/* roulang page: index */
/* ===== 设计变量 ===== */
:root {
    --bg-0: #0A0C12;
    --bg-1: #111722;
    --bg-2: #1A2230;
    --primary: #FF4D1C;
    --primary-hover: #FF6A3D;
    --primary-dim: rgba(255, 77, 28, .15);
    --accent: #33E6FF;
    --text: #F4F6FA;
    --text-secondary: #A8B4C8;
    --text-muted: #6E7B90;
    --border: rgba(255, 255, 255, .08);
    --border-strong: rgba(255, 255, 255, .18);
    --shadow-card: 0 4px 20px rgba(0, 0, 0, .35);
    --glow-primary: 0 0 0 1px rgba(255, 77, 28, .25), 0 0 24px rgba(255, 77, 28, .12);
    --radius-card: 14px;
    --radius-btn: 10px;
    --font-family: "Inter", "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", sans-serif;
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-family);
    background: var(--bg-0);
    color: var(--text);
    line-height: 1.8;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--primary-hover); }
button { font-family: var(--font-family); cursor: pointer; border: none; background: none; }
input, textarea { font-family: var(--font-family); }
ul { list-style: none; }

h1, h2, h3, h4 { font-weight: 700; line-height: 1.3; }
h1 { font-size: clamp(30px, 4.5vw, 46px); line-height: 1.15; font-weight: 800; }
h2 { font-size: clamp(22px, 3vw, 32px); line-height: 1.25; }
h3 { font-size: 18px; line-height: 1.35; }

.container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== 布局框架 ===== */
.app-shell { display: flex; min-height: 100vh; }

.sidebar {
    width: 240px;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    background: var(--bg-1);
    border-right: 1px solid var(--border);
    z-index: 100;
    display: flex;
    flex-direction: column;
    transition: transform .3s ease;
}

.main-content {
    margin-left: 240px;
    flex: 1;
    min-height: 100vh;
    background: var(--bg-0);
}

/* ===== 侧边栏 Logo ===== */
.sidebar-logo {
    padding: 28px 20px 20px;
    border-bottom: 1px solid var(--border);
}

.logo-mark {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #FF4D1C, #FF8A50);
    border-radius: 12px;
    font-size: 20px;
    color: #0A0C12;
    flex-shrink: 0;
}

.logo-name {
    font-size: 18px;
    font-weight: 800;
    color: var(--text);
    letter-spacing: 0.5px;
    line-height: 1.3;
}
.logo-name span { color: var(--primary); }

/* ===== 侧边栏导航 ===== */
.sidebar-nav { flex: 1; padding: 20px 12px; overflow-y: auto; }

.sidebar-nav .nav-group-title {
    font-size: 11px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 8px 12px 8px;
    font-weight: 600;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    color: var(--text-secondary);
    border-radius: 10px;
    font-size: 14px;
    font-weight: 500;
    transition: all .25s ease;
    margin-bottom: 2px;
    border-left: 3px solid transparent;
    position: relative;
}

.nav-item i { width: 20px; text-align: center; font-size: 16px; }

.nav-item:hover {
    background: rgba(255, 255, 255, .06);
    color: var(--text);
}

.nav-item:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: -2px;
}

.nav-item.active {
    background: var(--primary-dim);
    color: var(--text);
    border-left-color: var(--primary);
    font-weight: 600;
}

.nav-item.active::before {
    content: "";
    position: absolute;
    left: -3px;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 24px;
    background: var(--primary);
    border-radius: 0 3px 3px 0;
}

.nav-item:active { transform: scale(.98); }

.sidebar-footer {
    padding: 20px;
    border-top: 1px solid var(--border);
    font-size: 12px;
    color: var(--text-muted);
}

.sidebar-footer a { color: var(--text-muted); }
.sidebar-footer a:hover { color: var(--primary); }

/* ===== 移动端顶部栏 ===== */
.mobile-header {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 56px;
    background: var(--bg-1);
    border-bottom: 1px solid var(--border);
    z-index: 150;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
}

.mobile-logo { display: flex; align-items: center; gap: 8px; }
.mobile-logo .logo-icon { width: 32px; height: 32px; border-radius: 8px; font-size: 15px; }
.mobile-logo .logo-name { font-size: 16px; }

.menu-toggle {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text);
    font-size: 18px;
    border-radius: 8px;
    transition: background .2s;
}
.menu-toggle:hover { background: rgba(255, 255, 255, .06); }
.menu-toggle:focus-visible { outline: 2px solid var(--accent); }

/* 抽屉遮罩 */
.drawer-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, .55);
    z-index: 120;
    opacity: 0;
    transition: opacity .3s ease;
    pointer-events: none;
    backdrop-filter: blur(2px);
}
.drawer-overlay.show { opacity: 1; pointer-events: auto; }

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    height: 48px;
    padding: 0 28px;
    border-radius: var(--radius-btn);
    font-size: 15px;
    font-weight: 700;
    line-height: 1;
    transition: all .25s ease;
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
    white-space: nowrap;
}

.btn:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.btn:active { transform: scale(.97); filter: brightness(.95); }

.btn-primary {
    background: var(--primary);
    color: #0A0C12;
}

.btn-primary:hover {
    background: var(--primary-hover);
    box-shadow: var(--glow-primary);
    transform: translateY(-2px);
    color: #0A0C12;
}

.btn-secondary {
    background: var(--bg-2);
    color: var(--text);
    border-color: var(--border);
}

.btn-secondary:hover {
    border-color: var(--primary);
    color: var(--text);
    transform: translateY(-2px);
    box-shadow: 0 0 16px rgba(255, 77, 28, .12);
}

.btn-lg { height: 56px; padding: 0 40px; font-size: 16px; }
.btn-sm { height: 36px; padding: 0 18px; font-size: 13px; }

/* ===== 徽章 / 标签 ===== */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
    background: var(--primary-dim);
    color: var(--primary-hover);
    border: 1px solid rgba(255, 77, 28, .2);
}

.badge-cyan {
    background: rgba(51, 230, 255, .1);
    color: var(--accent);
    border-color: rgba(51, 230, 255, .2);
}

.badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--primary);
    display: inline-block;
}
.badge-dot.cyan { background: var(--accent); }
.badge-dot.yellow { background: #F5C542; }

/* ===== Hero 区块 ===== */
.hero {
    position: relative;
    background: var(--bg-0);
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('/assets/images/backpic/back-1.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    z-index: 0;
}

.hero-bg::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, rgba(10, 12, 18, .65) 0%, rgba(10, 12, 18, .55) 50%, var(--bg-0) 100%);
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 640px;
}

.hero h1 {
    margin-bottom: 18px;
    font-weight: 800;
    letter-spacing: 0.5px;
}

.hero h1 .gradient-text {
    background: linear-gradient(135deg, #FF4D1C, #FF8A50);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-fill-color: transparent;
    text-shadow: none;
}

.hero-lead {
    font-size: 18px;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 36px;
    max-width: 520px;
}

.hero-badges { margin-top: 36px; display: flex; gap: 12px; flex-wrap: wrap; }

/* ===== 区块通用 ===== */
.section { padding: 96px 0; position: relative; }

.section-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 12px;
}

.section-label::before {
    content: "";
    width: 24px;
    height: 2px;
    background: var(--primary);
    display: inline-block;
}

.section-title { margin-bottom: 16px; }

.section-sub {
    color: var(--text-secondary);
    font-size: 16px;
    line-height: 1.8;
    max-width: 640px;
    margin-bottom: 48px;
}

/* 斜切装饰 */
.clip-block { clip-path: polygon(0 0, 100% 0, calc(100% - 48px) 100%, 0 100%); }

/* ===== 演示区块（交错布局） ===== */
.demo-row { display: flex; align-items: center; gap: 64px; margin-bottom: 96px; }
.demo-row:last-child { margin-bottom: 0; }
.demo-row.reverse { flex-direction: row-reverse; }

.demo-media { flex: 1; }
.demo-content { flex: 1; }

.demo-media .media-frame {
    position: relative;
    border-radius: var(--radius-card);
    overflow: hidden;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-card);
}

.demo-media .media-frame img { width: 100%; aspect-ratio: 4/3; object-fit: cover; }

.demo-media .media-frame::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
}

.demo-media .media-frame:hover { transform: translateY(-2px); border-color: var(--border-strong); transition: all .3s ease; }

.demo-content h3 { font-size: 20px; font-weight: 700; margin-bottom: 14px; }

.demo-content p { color: var(--text-secondary); font-size: 15px; margin-bottom: 20px; line-height: 1.9; }

.feature-list li { display: flex; align-items: center; gap: 10px; padding: 6px 0; color: var(--text); font-size: 14px; }

.feature-list li i { color: var(--accent); font-size: 14px; width: 16px; }

/* ===== 证据数据区 ===== */
.evidence {
    background: var(--bg-1);
    position: relative;
    padding: 80px 0;
}

.evidence::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary), var(--accent), transparent);
}

.evidence-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; text-align: center; }

.evidence-item { padding: 32px 24px; }

.evidence-item .number {
    font-size: 74px;
    font-weight: 800;
    line-height: 1;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-fill-color: transparent;
    margin-bottom: 8px;
}

.evidence-item .label { color: var(--text-secondary); font-size: 14px; }

/* ===== 内容卡片网格（CMS） ===== */
.grid-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }

.content-card {
    background: var(--bg-1);
    border-radius: var(--radius-card);
    border: 1px solid var(--border);
    overflow: hidden;
    transition: all .3s ease;
    display: flex;
    flex-direction: column;
}

.content-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-strong);
    box-shadow: var(--shadow-card);
}

.card-thumb { position: relative; overflow: hidden; aspect-ratio: 16/10; background: var(--bg-2); display: flex; align-items: center; justify-content: center; }

.card-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }

.content-card:hover .card-thumb img { transform: scale(1.03); }

.card-thumb .thumb-placeholder { color: var(--text-muted); font-size: 32px; }

.card-body { padding: 20px; flex: 1; display: flex; flex-direction: column; }

.card-title { font-size: 15px; font-weight: 700; color: var(--text); margin-bottom: 8px; line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden; }

.card-summary { font-size: 13px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 16px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; flex: 1; }

.card-meta { display: flex; align-items: center; justify-content: space-between; border-top: 1px solid var(--border); padding-top: 12px; }

.card-meta .time { font-size: 12px; color: var(--text-muted); }

.card-meta .category-tag { font-size: 11px; padding: 3px 10px; border-radius: 20px; background: var(--primary-dim); color: var(--primary-hover); font-weight: 500; }

.card-meta .category-tag.cyan { background: rgba(51, 230, 255, .1); color: var(--accent); }

.card-meta .category-tag.yellow { background: rgba(245, 197, 66, .12); color: #F5C542; }

.empty-state { padding: 60px; border: 2px dashed var(--border); border-radius: var(--radius-card); text-align: center; color: var(--text-muted); font-size: 14px; }

/* ===== 价格区 ===== */
.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; align-items: stretch; }

.price-card {
    background: var(--bg-1);
    border: 1px solid var(--border);
    border-radius: var(--radius-card);
    padding: 36px 28px;
    display: flex;
    flex-direction: column;
    position: relative;
    transition: all .3s ease;
}

.price-card:hover { transform: translateY(-4px); border-color: var(--border-strong); box-shadow: var(--shadow-card); }

.price-card.featured {
    border-color: var(--primary);
    box-shadow: var(--glow-primary);
    background: linear-gradient(180deg, rgba(255, 77, 28, .06), var(--bg-1));
}

.price-card.featured::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--primary-hover));
    border-radius: var(--radius-card) var(--radius-card) 0 0;
}

.price-card.featured::after {
    content: "热门";
    position: absolute;
    top: 12px; right: -24px;
    background: var(--primary);
    color: #0A0C12;
    font-size: 12px;
    font-weight: 700;
    padding: 4px 10px;
    transform: rotate(45deg);
    width: 80px;
    text-align: center;
    box-shadow: 0 2px 8px rgba(255, 77, 28, .4);
}

.price-plan { font-size: 14px; font-weight: 700; color: var(--text-secondary); margin-bottom: 12px; text-transform: uppercase; letter-spacing: 0.5px; }

.price-amount { font-size: 42px; font-weight: 800; color: var(--text); line-height: 1.2; margin-bottom: 4px; }

.price-amount .unit { font-size: 18px; font-weight: 500; color: var(--text-muted); }

.price-period { font-size: 13px; color: var(--text-muted); margin-bottom: 24px; }

.price-features { flex: 1; margin-bottom: 28px; }

.price-features li { display: flex; gap: 8px; align-items: flex-start; font-size: 13px; color: var(--text-secondary); padding: 6px 0; }

.price-features li i { color: var(--primary); font-size: 12px; margin-top: 6px; flex-shrink: 0; }

/* ===== FAQ 手风琴 ===== */
.faq-wrap { max-width: 720px; margin: 0 auto; }

.accordion-item { border-bottom: 1px solid var(--border); }

.accordion-item:last-child { border-bottom: none; }

.accordion-header {
    width: 100%;
    text-align: left;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 16px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
    background: none;
    transition: color .2s ease;
    gap: 16px;
}

.accordion-header:hover { color: var(--primary); }
.accordion-header:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }
.accordion-header.active { color: var(--primary); }

.accordion-header i { font-size: 14px; color: var(--text-muted); transition: transform .2s ease; }

.accordion-header.active i { transform: rotate(45deg); color: var(--primary); }

.accordion-body { max-height: 0; overflow: hidden; transition: max-height .2s ease; }

.accordion-content { padding: 0 16px 20px; font-size: 13px; color: var(--text-secondary); line-height: 1.8; }

/* ===== CTA 区 ===== */
.cta-section { position: relative; text-align: center; padding: 120px 0; }

.cta-section::before {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80%;
    height: 80%;
    background: radial-gradient(ellipse, rgba(255, 77, 28, .08), transparent 70%);
    pointer-events: none;
    z-index: 0;
}

.cta-section > * { position: relative; z-index: 1; }

.cta-section h2 { margin-bottom: 16px; }

.cta-section p { color: var(--text-secondary); font-size: 16px; margin-bottom: 32px; }

.cta-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ===== 浮动 CTA ===== */
.float-cta {
    position: fixed;
    right: 24px;
    bottom: 24px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--primary);
    color: #0A0C12;
    font-size: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 16px rgba(255, 77, 28, .4);
    opacity: 0;
    visibility: hidden;
    transition: all .3s ease;
    z-index: 200;
    cursor: pointer;
}

.float-cta.visible { opacity: 1; visibility: visible; }
.float-cta:hover { transform: scale(1.06); box-shadow: var(--glow-primary); background: var(--primary-hover); }
.float-cta:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.float-cta:active { transform: scale(.96); }

/* ===== 页脚 ===== */
.site-footer {
    background: var(--bg-1);
    border-top: 1px solid var(--border);
    padding: 48px 0 24px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 40px;
}

.footer-brand .logo-name { font-size: 20px; margin-bottom: 12px; }

.footer-brand p { font-size: 13px; color: var(--text-muted); line-height: 1.8; max-width: 360px; }

.footer-title { font-size: 14px; font-weight: 700; color: var(--text); margin-bottom: 16px; }

.footer-links li { margin-bottom: 10px; }

.footer-links a { font-size: 13px; color: var(--text-secondary); }
.footer-links a:hover { color: var(--primary); }

.footer-bottom { border-top: 1px solid var(--border); padding-top: 24px; text-align: center; }

.footer-bottom p { font-size: 12px; color: var(--text-muted); }

/* ===== 弹窗/对话框 ===== */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(10, 12, 18, .75);
    z-index: 300;
    align-items: center;
    justify-content: center;
    padding: 16px;
    backdrop-filter: blur(4px);
}
.modal-overlay.show { display: flex; }

.modal-box {
    background: var(--bg-1);
    border-radius: 14px;
    border: 1px solid var(--border);
    max-width: 420px;
    width: 100%;
    padding: 36px;
    position: relative;
    box-shadow: var(--shadow-card);
}

.modal-close {
    position: absolute;
    top: 14px;
    right: 14px;
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: var(--text-muted);
    font-size: 14px;
    transition: all .2s;
}
.modal-close:hover { background: rgba(255, 255, 255, .08); color: var(--text); }
.modal-close:focus-visible { outline: 2px solid var(--accent); }

.modal-box h3 { margin-bottom: 8px; font-size: 20px; }

.modal-box > p { font-size: 13px; color: var(--text-secondary); margin-bottom: 20px; line-height: 1.7; }

.form-group { margin-bottom: 16px; }

.form-group label { font-size: 12px; color: var(--text-secondary); display: block; margin-bottom: 6px; }

.form-group input {
    width: 100%;
    height: 44px;
    background: var(--bg-2);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0 14px;
    color: var(--text);
    font-size: 14px;
    transition: border-color .2s, box-shadow .2s;
}
.form-group input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 2px rgba(51, 230, 255, .15); }

/* ===== 响应式 ===== */
@media (max-width: 1023.98px) {
    .sidebar { transform: translateX(-100%); width: 280px; }
    .sidebar.open { transform: translateX(0); box-shadow: 4px 0 32px rgba(0, 0, 0, .5); }
    .mobile-header { display: flex; }
    .main-content { margin-left: 0; }
    .hero { padding-top: 100px; }
    .section { padding: 64px 0; }
    .grid-cards { grid-template-columns: repeat(2, 1fr); }
    .pricing-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }
    .demo-row { flex-direction: column; gap: 32px; margin-bottom: 64px; }
    .demo-row.reverse { flex-direction: column; }
    .evidence-grid { grid-template-columns: repeat(3, 1fr); gap: 24px; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .drawer-overlay { display: block; }
}

@media (max-width: 640px) {
    .grid-cards { grid-template-columns: 1fr; }
    .evidence-grid { grid-template-columns: 1fr; gap: 16px; }
    .evidence-item .number { font-size: 54px; }
    .section { padding: 48px 0; }
    .container { padding: 0 16px; }
    .hero h1 { font-size: 30px; }
    .hero-lead { font-size: 16px; }
    .cta-buttons .btn { width: 100%; }
    .pricing-grid { max-width: 100%; }
    .badge { font-size: 11px; padding: 3px 10px; }
}

/* ===== 可访问性 ===== */
@media (prefers-reduced-motion: reduce) {
    * { animation: none !important; transition: none !important; }
}

/* roulang page: article */
:root {
            --bg-0: #0A0C12;
            --bg-1: #111722;
            --bg-2: #1A2230;
            --primary: #FF4D1C;
            --primary-hover: #FF6A3D;
            --primary-dim: rgba(255,77,28,.15);
            --accent: #33E6FF;
            --text: #F4F6FA;
            --text-secondary: #A8B4C8;
            --text-muted: #6E7B90;
            --border: rgba(255,255,255,.08);
            --border-strong: rgba(255,255,255,.18);
            --shadow-card: 0 4px 20px rgba(0,0,0,.35);
            --glow-primary: 0 0 0 1px rgba(255,77,28,.25), 0 0 24px rgba(255,77,28,.12);
            --font-stack: "Inter", "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", sans-serif;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-stack);
            background: var(--bg-0);
            color: var(--text);
            line-height: 1.75;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
        }

        img {
            max-width: 100%;
            display: block;
            border: 0;
        }

        a {
            color: var(--accent);
            text-decoration: none;
            transition: color .2s ease, background .2s ease, border-color .2s ease, opacity .2s ease, transform .2s ease;
        }

        a:hover {
            color: var(--primary-hover);
        }

        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        ul,
        ol {
            list-style: none;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ============ App Shell 导航 ============ */
        .app-shell {
            display: flex;
            min-height: 100vh;
        }

        .sidebar {
            width: 240px;
            background: var(--bg-1);
            border-right: 1px solid var(--border);
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            z-index: 100;
            display: flex;
            flex-direction: column;
            padding: 24px 0;
            overflow-y: auto;
        }

        .sidebar-header {
            padding: 0 20px;
            margin-bottom: 32px;
        }

        .logo-mark {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            letter-spacing: .5px;
            color: var(--text);
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), #FF8A50);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--bg-0);
            font-size: 18px;
            flex-shrink: 0;
        }

        .logo-name {
            white-space: nowrap;
        }

        .logo-name span {
            color: var(--primary);
        }

        .sidebar-nav {
            flex: 1;
            padding: 0 12px;
        }

        .nav-section-label {
            font-size: 11px;
            font-weight: 700;
            text-transform: uppercase;
            color: var(--text-muted);
            letter-spacing: 1.5px;
            padding: 0 12px;
            margin-bottom: 12px;
        }

        .nav-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 11px 14px;
            border-radius: 10px;
            color: var(--text-secondary);
            font-size: 15px;
            font-weight: 500;
            margin-bottom: 4px;
            transition: background .18s ease, color .18s ease;
            border-left: 4px solid transparent;
        }

        .nav-item i {
            width: 20px;
            text-align: center;
            font-size: 14px;
            color: var(--text-muted);
            transition: color .18s ease;
        }

        .nav-item:hover {
            background: rgba(255,255,255,.06);
            color: var(--text);
        }

        .nav-item:hover i {
            color: var(--accent);
        }

        .nav-item.active {
            background: var(--primary-dim);
            color: var(--text);
            border-left-color: var(--primary);
        }

        .nav-item.active i {
            color: var(--primary);
        }

        .sidebar-footer {
            padding: 20px 24px 8px;
            border-top: 1px solid var(--border);
            margin-top: 20px;
        }

        .sidebar-footer a {
            font-size: 13px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .sidebar-footer a:hover {
            color: var(--accent);
        }

        .main-content {
            margin-left: 240px;
            flex: 1;
        }

        /* 移动端 */
        .mobile-header {
            display: none;
        }

        .menu-overlay {
            display: none;
        }

        @media (max-width: 1023px) {
            .sidebar {
                transform: translateX(-100%);
                transition: transform .25s ease;
                box-shadow: 4px 0 24px rgba(0,0,0,.4);
            }

            .sidebar.open {
                transform: translateX(0);
            }

            .menu-overlay {
                display: block;
                position: fixed;
                inset: 0;
                background: rgba(0,0,0,.55);
                z-index: 99;
                opacity: 0;
                pointer-events: none;
                transition: opacity .25s ease;
                backdrop-filter: blur(2px);
            }

            .menu-overlay.open {
                opacity: 1;
                pointer-events: auto;
            }

            .mobile-header {
                display: flex;
                align-items: center;
                justify-content: space-between;
                height: 56px;
                padding: 0 16px;
                background: var(--bg-1);
                border-bottom: 1px solid var(--border);
                position: sticky;
                top: 0;
                z-index: 90;
            }

            .mobile-logo {
                display: inline-flex;
                align-items: center;
                gap: 10px;
                font-size: 18px;
                font-weight: 800;
                color: var(--text);
            }

            .mobile-logo .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 14px;
                border-radius: 8px;
            }

            .menu-toggle {
                background: transparent;
                border: 1px solid var(--border);
                color: var(--text);
                width: 40px;
                height: 40px;
                border-radius: 10px;
                font-size: 16px;
                cursor: pointer;
                transition: border-color .2s ease, background .2s ease;
                display: flex;
                align-items: center;
                justify-content: center;
            }

            .menu-toggle:hover {
                border-color: var(--primary);
                background: var(--primary-dim);
            }

            .main-content {
                margin-left: 0;
            }
        }

        /* ============ 文章页样式 ============ */
        .article-wrap {
            padding: 40px 0 80px;
        }

        .breadcrumb-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 28px;
            padding: 0 24px;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
        }

        .breadcrumb a {
            color: var(--text-secondary);
            transition: color .2s;
        }

        .breadcrumb a:hover {
            color: var(--primary);
        }

        .breadcrumb .sep {
            color: var(--text-muted);
            opacity: .5;
        }

        .breadcrumb .current {
            color: var(--text-muted);
            max-width: 240px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .back-link {
            background: var(--bg-1);
            border: 1px solid var(--border);
            padding: 8px 18px;
            border-radius: 10px;
            font-size: 13px;
            color: var(--text-secondary);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: all .2s ease;
        }

        .back-link:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        .tdk-preview {
            max-width: 860px;
            margin: 0 auto 40px;
            background: var(--bg-1);
            border: 1px solid var(--border);
            border-radius: 14px;
            padding: 32px 28px;
            position: relative;
            overflow: hidden;
        }

        .tdk-preview::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--primary-hover), var(--accent));
        }

        .tdk-preview h1 {
            font-size: clamp(26px, 3.2vw, 36px);
            line-height: 1.25;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 18px;
            letter-spacing: -.02em;
        }

        .article-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 18px;
            font-size: 12px;
            color: var(--text-muted);
        }

        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .article-meta i {
            color: var(--accent);
            font-size: 11px;
        }

        .article-body {
            max-width: 720px;
            margin: 0 auto;
            font-size: 15.5px;
            line-height: 1.9;
            color: var(--text-secondary);
        }

        .article-body p {
            margin-bottom: 24px;
        }

        .article-body h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text);
            margin: 40px 0 16px;
            line-height: 1.35;
        }

        .article-body h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text);
            margin: 32px 0 14px;
            line-height: 1.4;
        }

        .article-body img {
            border-radius: 14px;
            margin: 24px 0;
        }

        .article-body blockquote {
            border-left: 3px solid var(--primary);
            background: var(--bg-1);
            padding: 16px 20px;
            border-radius: 0 10px 10px 0;
            margin: 24px 0;
            color: var(--text-secondary);
            font-size: 15px;
        }

        .article-body ul,
        .article-body ol {
            margin: 16px 0 24px;
            padding-left: 24px;
        }

        .article-body ul li,
        .article-body ol li {
            margin-bottom: 8px;
            position: relative;
        }

        .article-body ul li::before {
            content: '';
            position: absolute;
            left: -18px;
            top: 10px;
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--primary);
        }

        .article-empty {
            max-width: 720px;
            margin: 0 auto;
            background: var(--bg-1);
            border: 2px dashed var(--border-strong);
            border-radius: 14px;
            padding: 60px 24px;
            text-align: center;
            color: var(--text-muted);
            font-size: 15px;
        }

        .article-empty a {
            display: inline-block;
            margin-top: 16px;
            color: var(--primary);
            font-weight: 600;
        }

        /* 相关推荐 */
        .related-section {
            max-width: 1080px;
            margin: 60px auto 0;
            padding: 40px 24px 0;
            border-top: 1px solid var(--border);
        }

        .related-section h2 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 24px;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .related-card {
            background: var(--bg-1);
            border: 1px solid var(--border);
            border-radius: 14px;
            overflow: hidden;
            transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
        }

        .related-card:hover {
            transform: translateY(-3px);
            border-color: var(--border-strong);
            box-shadow: var(--shadow-card);
        }

        .related-card .thumb {
            aspect-ratio: 16/10;
            overflow: hidden;
            background: var(--bg-2);
            position: relative;
        }

        .related-card .thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .3s ease;
        }

        .related-card:hover .thumb img {
            transform: scale(1.04);
        }

        .related-info {
            padding: 18px;
        }

        .related-info h3 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text);
            line-height: 1.4;
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-info p {
            font-size: 13px;
            color: var(--text-muted);
        }

        .related-bottom {
            text-align: center;
            margin-top: 32px;
        }

        @media (max-width: 900px) {
            .related-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 640px) {
            .related-grid {
                grid-template-columns: 1fr;
            }

            .tdk-preview {
                padding: 24px 18px;
            }

            .breadcrumb-row {
                padding: 0 16px;
            }
        }

        /* ============ 页脚 ============ */
        .site-footer {
            background: var(--bg-1);
            border-top: 1px solid var(--border);
            padding: 56px 0 32px;
            margin-top: 40px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 40px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-top: 12px;
        }

        .footer-title {
            font-size: 14px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 18px;
            letter-spacing: .5px;
        }

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: color .2s ease, padding-left .2s ease;
        }

        .footer-links a:hover {
            color: var(--primary);
            padding-left: 4px;
        }

        .footer-bottom {
            border-top: 1px solid var(--border);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }

/* roulang page: category1 */
:root {
            --bg-0: #0A0C12;
            --bg-1: #111722;
            --bg-2: #1A2230;
            --primary: #FF4D1C;
            --primary-hover: #FF6A3D;
            --primary-dim: rgba(255, 77, 28, .15);
            --accent: #33E6FF;
            --text: #F4F6FA;
            --text-secondary: #A8B4C8;
            --text-muted: #6E7B90;
            --border: rgba(255, 255, 255, .08);
            --border-strong: rgba(255, 255, 255, .18);
            --radius-card: 14px;
            --radius-btn: 10px;
            --shadow-card: 0 4px 20px rgba(0, 0, 0, .35);
            --glow-primary: 0 0 0 1px rgba(255, 77, 28, .25), 0 0 24px rgba(255, 77, 28, .12);
            --font-sans: "Inter", "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: var(--font-sans);
            background: var(--bg-0);
            color: var(--text);
            line-height: 1.8;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
        }

        img {
            max-width: 100%;
            display: block;
            border: 0;
        }

        a {
            color: var(--accent);
            text-decoration: none;
            transition: color .2s ease;
        }

        a:hover {
            color: var(--primary-hover);
        }

        button {
            font-family: var(--font-sans);
            cursor: pointer;
        }

        .container {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        .main-content {
            margin-left: 240px;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            position: relative;
            transition: margin-left .25s ease;
        }

        /* ===== Left Sidebar ===== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            width: 240px;
            background: var(--bg-1);
            border-right: 1px solid var(--border);
            z-index: 300;
            display: flex;
            flex-direction: column;
            transition: transform .25s ease;
        }

        .sidebar-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 28px 24px 20px;
            border-bottom: 1px solid var(--border);
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), #FF8A50);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0A0C12;
            font-size: 16px;
            flex-shrink: 0;
        }

        .logo-name {
            font-size: 19px;
            font-weight: 800;
            letter-spacing: .5px;
            color: var(--text);
            white-space: nowrap;
        }

        .logo-name span {
            color: var(--primary);
        }

        .sidebar-nav {
            padding: 20px 12px;
            display: flex;
            flex-direction: column;
            gap: 4px;
            flex: 1;
            overflow-y: auto;
        }

        .nav-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 11px 14px;
            border-radius: 10px;
            color: var(--text-secondary);
            font-size: 14px;
            font-weight: 500;
            position: relative;
            transition: background .2s ease, color .2s ease, border-color .2s ease;
            border-left: 4px solid transparent;
        }

        .nav-item i {
            width: 18px;
            text-align: center;
            font-size: 15px;
            color: var(--text-muted);
            transition: color .2s ease;
        }

        .nav-item:hover {
            background: rgba(255, 255, 255, .06);
            color: var(--text);
        }

        .nav-item:hover i {
            color: var(--primary);
        }

        .nav-item.active {
            background: var(--primary-dim);
            border-left-color: var(--primary);
            color: var(--text);
        }

        .nav-item.active i {
            color: var(--primary);
        }

        .nav-item:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        .sidebar-foot {
            padding: 16px 24px;
            border-top: 1px solid var(--border);
        }

        .sidebar-foot a,
        .sidebar-foot span {
            font-size: 12px;
            color: var(--text-muted);
            display: block;
        }

        /* ===== Mobile Header ===== */
        .mobile-header {
            display: none;
            width: 100%;
            height: 56px;
            position: sticky;
            top: 0;
            z-index: 350;
            background: rgba(10, 12, 18, .92);
            -webkit-backdrop-filter: blur(12px);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            align-items: center;
            justify-content: space-between;
            padding: 0 20px;
        }

        .mobile-logo {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .menu-toggle {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: var(--bg-2);
            border: 1px solid var(--border);
            color: var(--text);
            font-size: 17px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: background .2s ease, border-color .2s ease;
        }

        .menu-toggle:hover {
            border-color: var(--primary);
            background: var(--primary-dim);
        }

        .menu-toggle:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        .nav-overlay {
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, .55);
            z-index: 290;
            opacity: 0;
            visibility: hidden;
            transition: opacity .25s ease, visibility .25s ease;
            -webkit-backdrop-filter: blur(2px);
            backdrop-filter: blur(2px);
        }

        .nav-overlay.show {
            opacity: 1;
            visibility: visible;
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-wrap {
            padding: 24px 0 0;
        }

        .breadcrumb-wrap .container {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
        }

        .breadcrumb-wrap a {
            color: var(--text-secondary);
            transition: color .2s ease;
        }

        .breadcrumb-wrap a:hover {
            color: var(--primary);
        }

        .breadcrumb-wrap .sep {
            color: var(--text-muted);
        }

        .breadcrumb-wrap .current {
            color: var(--text-muted);
            max-width: 240px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 48px;
            padding: 0 28px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 700;
            border: 1px solid transparent;
            transition: all .2s ease;
            text-decoration: none;
            white-space: nowrap;
        }

        .btn:focus-visible,
        a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        .btn-primary {
            background: var(--primary);
            color: #0A0C12;
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            color: #0A0C12;
            box-shadow: var(--glow-primary);
            transform: translateY(-1px);
        }

        .btn-primary:active {
            transform: translateY(0);
            filter: brightness(.92);
        }

        .btn-ghost {
            background: transparent;
            border-color: var(--border-strong);
            color: var(--text);
        }

        .btn-ghost:hover {
            border-color: var(--primary);
            color: var(--primary-hover);
            background: var(--primary-dim);
        }

        .btn-ghost:active {
            filter: brightness(.9);
        }

        .btn-dark {
            background: var(--bg-2);
            color: var(--text);
            border-color: var(--border);
        }

        .btn-dark:hover {
            border-color: var(--primary);
            color: var(--primary-hover);
        }

        /* ===== Category Hero ===== */
        .category-hero {
            position: relative;
            padding: 72px 0 64px;
            overflow: hidden;
        }

        .category-hero .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: .35;
        }

        .category-hero .hero-bg::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10, 12, 18, .55) 0%, var(--bg-0) 100%);
        }

        .category-hero .container {
            position: relative;
            z-index: 2;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 5px 14px;
            border-radius: 20px;
            background: var(--primary-dim);
            color: var(--primary-hover);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: .3px;
            margin-bottom: 16px;
            border: 1px solid rgba(255, 77, 28, .25);
        }

        .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            display: inline-block;
            flex-shrink: 0;
        }

        .dot-match {
            background: var(--primary);
            box-shadow: 0 0 8px var(--primary);
        }

        .category-hero h1 {
            font-size: clamp(30px, 4.5vw, 46px);
            line-height: 1.15;
            font-weight: 800;
            margin: 0 0 14px;
            letter-spacing: .5px;
        }

        .category-hero h1 .highlight {
            background: linear-gradient(135deg, var(--primary), #FF8A50);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-sub {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 0 28px;
            line-height: 1.8;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        /* ===== Section ===== */
        .section-pad {
            padding: 64px 0;
        }

        .section-head {
            margin-bottom: 32px;
        }

        .section-head h2 {
            font-size: clamp(22px, 3vw, 32px);
            font-weight: 700;
            line-height: 1.25;
            margin: 0 0 10px;
        }

        .section-head p {
            color: var(--text-secondary);
            font-size: 14px;
            margin: 0;
            max-width: 640px;
        }

        /* ===== Stat Board ===== */
        .stat-board {
            padding: 48px 0 56px;
            background: var(--bg-1);
            position: relative;
            clip-path: polygon(0 0, 100% 3%, 100% 100%, 0 100%);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .stat-card {
            background: rgba(255, 255, 255, .02);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 28px 20px;
            text-align: center;
            transition: border-color .2s ease, transform .2s ease;
            margin-bottom: 16px;
        }

        .stat-card:hover {
            border-color: var(--border-strong);
            transform: translateY(-2px);
        }

        .stat-num {
            font-size: 74px;
            font-weight: 800;
            line-height: 1;
            display: block;
            color: var(--primary);
            text-shadow: 0 0 24px rgba(255, 77, 28, .2);
        }

        .stat-card:nth-child(2) .stat-num {
            color: var(--accent);
            text-shadow: 0 0 24px rgba(51, 230, 255, .15);
        }

        .stat-label {
            font-size: 14px;
            color: var(--text-secondary);
            margin-top: 10px;
            display: block;
            letter-spacing: 1px;
        }

        /* ===== Match List ===== */
        .match-list-section {
            padding: 64px 0 72px;
        }

        .match-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .match-item {
            display: flex;
            gap: 24px;
            background: var(--bg-1);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 20px;
            transition: border-color .2s ease, transform .2s ease, background .2s ease;
        }

        .match-item:hover {
            border-color: var(--border-strong);
            transform: translateY(-2px);
            background: var(--bg-2);
        }

        .match-item:focus-within {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        .item-thumb {
            width: 180px;
            flex-shrink: 0;
            border-radius: 12px;
            overflow: hidden;
            background: var(--bg-2);
            aspect-ratio: 16/10;
        }

        .item-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .3s ease;
        }

        .match-item:hover .item-thumb img {
            transform: scale(1.03);
        }

        .item-body {
            flex: 1;
            display: flex;
            flex-direction: column;
            min-width: 0;
        }

        .item-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-bottom: 6px;
            font-size: 12px;
            color: var(--text-muted);
        }

        .category-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary-hover);
            font-weight: 600;
        }

        .item-meta .dot {
            width: 5px;
            height: 5px;
        }

        .item-title {
            margin: 0 0 8px;
            font-size: 18px;
            font-weight: 700;
            line-height: 1.4;
        }

        .item-title a {
            color: var(--text);
            transition: color .2s ease;
        }

        .item-title a:hover {
            color: var(--primary-hover);
        }

        .item-excerpt {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin: 0 0 14px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .item-footer {
            margin-top: auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }

        .match-info {
            font-size: 12px;
            color: var(--text-muted);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .read-more {
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: color .2s ease, gap .2s ease;
        }

        .read-more:hover {
            color: var(--primary-hover);
            gap: 10px;
        }

        /* ===== Workflow ===== */
        .workflow-section {
            background: var(--bg-1);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
            padding: 64px 0;
        }

        .step-card {
            text-align: center;
            padding: 32px 20px;
            background: rgba(255, 255, 255, .02);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            height: 100%;
            transition: border-color .2s ease, transform .2s ease;
            margin-bottom: 16px;
        }

        .step-card:hover {
            border-color: var(--border-strong);
            transform: translateY(-2px);
        }

        .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary-dim);
            color: var(--primary);
            font-size: 16px;
            font-weight: 800;
            margin-bottom: 14px;
        }

        .step-card h3 {
            font-size: 17px;
            font-weight: 700;
            margin: 0 0 8px;
        }

        .step-card p {
            font-size: 13px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 64px 0 72px;
        }

        .faq-list {
            max-width: 720px;
            margin: 0 auto;
            background: var(--bg-1);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            overflow: hidden;
        }

        .faq-item {
            border-bottom: 1px solid var(--border);
        }

        .faq-item:last-child {
            border-bottom: 0;
        }

        .faq-question {
            width: 100%;
            background: transparent;
            border: 0;
            padding: 20px 24px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            text-align: left;
            transition: color .2s ease, background .2s ease;
        }

        .faq-question i {
            font-size: 14px;
            color: var(--text-muted);
            transition: transform .2s ease, color .2s ease;
            flex-shrink: 0;
        }

        .faq-question:hover {
            color: var(--primary-hover);
            background: rgba(255, 255, 255, .02);
        }

        .faq-question:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: -2px;
        }

        .faq-item.active .faq-question {
            color: var(--primary);
        }

        .faq-item.active .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .2s ease;
        }

        .faq-answer p {
            padding: 0 24px 20px;
            margin: 0;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        /* ===== CTA ===== */
        .cta-section {
            position: relative;
            padding: 72px 0;
            text-align: center;
            background: radial-gradient(ellipse at center, rgba(255, 77, 28, .08) 0%, transparent 65%);
            border-top: 1px solid var(--border);
        }

        .cta-section h2 {
            font-size: clamp(22px, 3vw, 30px);
            font-weight: 700;
            margin: 0 0 10px;
        }

        .cta-section p {
            color: var(--text-secondary);
            font-size: 14px;
            margin: 0 0 28px;
        }

        .cta-btns {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 12px;
        }

        /* ===== Other Categories ===== */
        .other-cats {
            padding: 56px 0 72px;
        }

        .other-cats-inner {
            background: var(--bg-1);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 32px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 20px;
        }

        .other-cats h2 {
            font-size: 20px;
            font-weight: 700;
            margin: 0 0 4px;
        }

        .other-cats-desc {
            font-size: 13px;
            color: var(--text-secondary);
            margin: 0;
        }

        .other-cats-links {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .cat-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 18px;
            border-radius: 8px;
            background: var(--bg-2);
            border: 1px solid var(--border);
            color: var(--text-secondary);
            font-size: 13px;
            font-weight: 500;
            transition: all .2s ease;
        }

        .cat-link:hover {
            border-color: var(--primary);
            color: var(--primary-hover);
            transform: translateY(-1px);
        }

        .cat-link:active {
            transform: translateY(0);
            filter: brightness(.92);
        }

        .cat-link .dot {
            width: 5px;
            height: 5px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-1);
            border-top: 1px solid var(--border);
            padding: 56px 0 0;
            margin-top: auto;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid var(--border);
        }

        .footer-brand .logo-mark {
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .footer-brand p {
            font-size: 13px;
            color: var(--text-muted);
            margin: 16px 0 0;
            max-width: 360px;
            line-height: 1.8;
        }

        .footer-title {
            font-size: 15px;
            font-weight: 700;
            margin: 0 0 14px;
            color: var(--text);
        }

        .footer-links {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links li {
            margin: 0;
        }

        .footer-links a {
            font-size: 13px;
            color: var(--text-secondary);
            transition: color .2s ease;
        }

        .footer-links a:hover {
            color: var(--primary-hover);
        }

        .footer-bottom {
            padding: 20px 0;
            text-align: center;
            font-size: 12px;
            color: var(--text-muted);
        }

        .footer-bottom a {
            color: var(--text-muted);
        }

        .footer-bottom a:hover {
            color: var(--primary-hover);
        }

        /* ===== Floating CTA ===== */
        .floating-cta {
            position: fixed;
            right: 24px;
            bottom: 24px;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--primary);
            color: #0A0C12;
            font-size: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 8px 24px rgba(255, 77, 28, .35);
            opacity: 0;
            visibility: hidden;
            transform: scale(.8);
            transition: all .25s ease;
            z-index: 400;
        }

        .floating-cta.visible {
            opacity: 1;
            visibility: visible;
            transform: scale(1);
        }

        .floating-cta:hover {
            background: var(--primary-hover);
            box-shadow: 0 8px 28px rgba(255, 77, 28, .5), var(--glow-primary);
            transform: scale(1.06);
            color: #0A0C12;
        }

        .floating-cta:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
        }

        /* ===== Foundation Overrides ===== */
        .grid-container {
            max-width: 1240px;
            padding: 0 24px;
        }

        .grid-margin-x {
            margin-left: -12px;
            margin-right: -12px;
        }

        .grid-margin-x>.cell {
            padding-left: 12px;
            padding-right: 12px;
        }

        /* ===== Responsive ===== */
        @media screen and (max-width: 1023px) {
            .sidebar {
                transform: translateX(-100%);
                box-shadow: none;
            }

            .sidebar.open {
                transform: translateX(0);
                box-shadow: 0 0 60px rgba(0, 0, 0, .5);
            }

            .mobile-header {
                display: flex;
            }

            .main-content {
                margin-left: 0;
            }

            .match-item {
                flex-direction: column;
            }

            .item-thumb {
                width: 100%;
                aspect-ratio: 16/8;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media screen and (max-width: 639px) {
            .container {
                padding: 0 16px;
            }

            .category-hero {
                padding: 48px 0 44px;
            }

            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }

            .hero-actions .btn {
                width: 100%;
            }

            .stat-num {
                font-size: 52px;
            }

            .match-list-section {
                padding: 48px 0;
            }

            .item-footer {
                flex-wrap: wrap;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .other-cats-inner {
                flex-direction: column;
                align-items: flex-start;
                padding: 24px;
            }

            .other-cats-links {
                width: 100%;
            }

            .cat-link {
                flex: 1;
                justify-content: center;
            }

            .floating-cta {
                right: 16px;
                bottom: 16px;
                width: 48px;
                height: 48px;
                font-size: 17px;
            }
        }

/* roulang page: category2 */
:root {
            --bg-0: #0A0C12;
            --bg-1: #111722;
            --bg-2: #1A2230;
            --bg-3: rgba(255, 77, 28, .08);
            --primary: #FF4D1C;
            --primary-hover: #FF6A3D;
            --primary-dim: rgba(255, 77, 28, .15);
            --accent: #33E6FF;
            --text: #F4F6FA;
            --text-secondary: #A8B4C8;
            --text-muted: #6E7B90;
            --border: rgba(255, 255, 255, .08);
            --border-strong: rgba(255, 255, 255, .18);
            --shadow-card: 0 4px 20px rgba(0, 0, 0, .35);
            --glow-primary: 0 0 0 1px rgba(255, 77, 28, .25), 0 0 24px rgba(255, 77, 28, .12);
            --radius-card: 14px;
            --radius-btn: 10px;
            --radius-tag: 20px;
            --sidebar-w: 240px;
            --trans: .2s ease;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "Inter", "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", sans-serif;
            background: var(--bg-0);
            color: var(--text);
            font-size: 15px;
            line-height: 1.8;
            min-height: 100vh;
            display: flex;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: var(--accent);
            text-decoration: none;
            transition: color var(--trans);
        }
        a:hover {
            color: var(--primary-hover);
        }
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 48px;
            padding: 0 28px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 700;
            text-decoration: none;
            border: 1px solid transparent;
            cursor: pointer;
            transition: all var(--trans);
            white-space: nowrap;
            line-height: 1;
        }
        .btn-primary {
            background: var(--primary);
            color: #0A0C12;
            box-shadow: 0 4px 16px rgba(255, 77, 28, .25);
        }
        .btn-primary:hover {
            background: var(--primary-hover);
            box-shadow: var(--glow-primary);
            transform: translateY(-1px);
            color: #0A0C12;
        }
        .btn-primary:focus-visible {
            box-shadow: 0 0 0 2px var(--accent);
        }
        .btn-primary:active {
            transform: scale(.96);
            filter: brightness(.9);
        }
        .btn-ghost {
            background: var(--bg-2);
            color: var(--text);
            border-color: var(--border);
        }
        .btn-ghost:hover {
            border-color: var(--primary);
            color: var(--primary-hover);
            transform: translateY(-1px);
        }
        .btn-ghost:active {
            transform: scale(.96);
            filter: brightness(.92);
        }

        /* ===== Sidebar ===== */
        .sidebar {
            width: var(--sidebar-w);
            position: fixed;
            top: 0;
            bottom: 0;
            left: 0;
            z-index: 120;
            display: flex;
            flex-direction: column;
            padding: 28px 16px 20px;
            background: var(--bg-1);
            border-right: 1px solid var(--border);
            overflow-y: auto;
            transition: transform .28s ease;
            scrollbar-width: thin;
            scrollbar-color: var(--border-strong) transparent;
        }
        .logo-mark {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 0 8px;
            margin-bottom: 32px;
            text-decoration: none;
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary) 0%, #FF8A50 100%);
            color: #0A0C12;
            font-size: 18px;
            flex-shrink: 0;
        }
        .logo-name {
            font-size: 20px;
            font-weight: 800;
            letter-spacing: 1px;
            color: var(--text);
            line-height: 1.2;
        }
        .logo-name span {
            color: var(--primary);
        }
        .site-nav {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .nav-link {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 11px 14px;
            border-radius: 8px;
            color: var(--text-secondary);
            font-size: 14px;
            font-weight: 600;
            text-decoration: none;
            border-left: 3px solid transparent;
            transition: background var(--trans), color var(--trans);
        }
        .nav-link i {
            width: 18px;
            text-align: center;
            font-size: 14px;
        }
        .nav-link:hover {
            background: rgba(255, 255, 255, .06);
            color: var(--text);
        }
        .nav-link.active {
            background: var(--primary-dim);
            border-left-color: var(--primary);
            color: var(--text);
        }
        .sidebar-foot {
            margin-top: auto;
            padding: 16px 8px 0;
            border-top: 1px solid var(--border);
            font-size: 12px;
            color: var(--text-muted);
        }
        .sidebar-foot a {
            color: var(--text-muted);
            font-weight: 600;
        }
        .sidebar-foot a:hover {
            color: var(--primary-hover);
        }

        /* ===== Mobile Header ===== */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 130;
            height: 56px;
            align-items: center;
            justify-content: space-between;
            padding: 0 16px;
            background: rgba(17, 23, 34, .95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border);
        }
        .mobile-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            text-decoration: none;
        }
        .mobile-logo .logo-icon {
            width: 32px;
            height: 32px;
            font-size: 15px;
            border-radius: 8px;
        }
        .mobile-logo .logo-name {
            font-size: 17px;
        }
        .menu-toggle {
            width: 40px;
            height: 40px;
            border: 1px solid var(--border);
            border-radius: 8px;
            background: var(--bg-2);
            color: var(--text);
            font-size: 17px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all var(--trans);
        }
        .menu-toggle:hover {
            border-color: var(--primary);
            color: var(--primary-hover);
        }
        .menu-toggle:active {
            transform: scale(.94);
        }
        .sidebar-overlay {
            position: fixed;
            inset: 0;
            z-index: 110;
            background: rgba(0, 0, 0, .55);
            opacity: 0;
            visibility: hidden;
            transition: all .25s ease;
        }
        .sidebar-overlay.show {
            opacity: 1;
            visibility: visible;
        }

        /* ===== Main ===== */
        .main-content {
            margin-left: var(--sidebar-w);
            flex: 1;
            min-width: 0;
            padding-top: 0;
        }

        /* ===== Page Hero ===== */
        .page-hero {
            position: relative;
            padding: 88px 40px 72px;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(100deg, rgba(10, 12, 18, .92) 30%, rgba(10, 12, 18, .55) 68%, rgba(10, 12, 18, .35) 100%);
            z-index: 1;
        }
        .page-hero .hero-content {
            position: relative;
            z-index: 2;
            max-width: 760px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 14px;
            border-radius: var(--radius-tag);
            background: var(--primary-dim);
            color: var(--primary-hover);
            font-size: 13px;
            font-weight: 700;
            border: 1px solid rgba(255, 77, 28, .25);
            margin-bottom: 24px;
        }
        .page-hero h1 {
            font-size: clamp(32px, 4.5vw, 48px);
            line-height: 1.15;
            font-weight: 800;
            letter-spacing: 1px;
            margin-bottom: 18px;
            color: var(--text);
        }
        .page-hero h1 span {
            color: var(--primary);
            text-shadow: 0 0 28px rgba(255, 77, 28, .35);
        }
        .hero-sub {
            font-size: 16px;
            line-height: 1.9;
            color: var(--text-secondary);
            max-width: 620px;
            margin-bottom: 32px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 40px;
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
        }
        .hero-stats span {
            font-size: 13px;
            color: var(--text-muted);
            display: flex;
            flex-direction: column;
            line-height: 1.6;
        }
        .hero-stats strong {
            font-size: 24px;
            font-weight: 800;
            color: var(--text);
            line-height: 1.3;
        }

        /* ===== Section Common ===== */
        .section-pad {
            padding: 80px 40px;
        }
        .section-head {
            max-width: 720px;
            margin-bottom: 48px;
        }
        .section-tag {
            display: inline-block;
            padding: 5px 14px;
            border-radius: var(--radius-tag);
            background: var(--primary-dim);
            color: var(--primary-hover);
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 1px;
            margin-bottom: 14px;
            text-transform: uppercase;
        }
        .section-head h2 {
            font-size: clamp(22px, 3vw, 32px);
            line-height: 1.25;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 12px;
        }
        .section-head p {
            font-size: 15px;
            line-height: 1.8;
            color: var(--text-secondary);
        }

        /* ===== Features ===== */
        .features-section {
            background: var(--bg-0);
            padding: 80px 40px;
        }
        .feature-card {
            background: var(--bg-1);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            height: 100%;
            transition: all var(--trans);
            position: relative;
            overflow: hidden;
        }
        .feature-card::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), transparent);
            opacity: 0;
            transition: opacity var(--trans);
        }
        .feature-card:hover {
            transform: translateY(-3px);
            border-color: var(--border-strong);
            box-shadow: var(--shadow-card);
        }
        .feature-card:hover::after {
            opacity: 1;
        }
        .feature-icon {
            width: 46px;
            height: 46px;
            border-radius: 12px;
            background: var(--primary-dim);
            color: var(--primary-hover);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 19px;
            margin-bottom: 18px;
        }
        .feature-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 14px;
            line-height: 1.8;
            color: var(--text-secondary);
        }

        /* ===== Guides List ===== */
        .guides-section {
            background: var(--bg-1);
            padding: 80px 40px;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .guide-list {
            display: flex;
            flex-direction: column;
            gap: 0;
            border-top: 1px solid var(--border);
        }
        .guide-item {
            display: flex;
            gap: 20px;
            align-items: flex-start;
            padding: 20px 8px;
            border-bottom: 1px solid var(--border);
            transition: background var(--trans);
        }
        .guide-item:hover {
            background: rgba(255, 255, 255, .025);
        }
        .guide-item:hover .guide-info h3 a {
            color: var(--primary-hover);
        }
        .guide-thumb {
            width: 120px;
            height: 90px;
            object-fit: cover;
            border-radius: 10px;
            flex-shrink: 0;
            background: var(--bg-2);
        }
        .guide-info {
            flex: 1;
            min-width: 0;
        }
        .guide-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 6px;
            flex-wrap: wrap;
        }
        .tag {
            display: inline-block;
            padding: 3px 12px;
            border-radius: var(--radius-tag);
            font-size: 11px;
            font-weight: 700;
            line-height: 1.5;
        }
        .tag-guide {
            background: rgba(51, 230, 255, .12);
            color: var(--accent);
        }
        .tag-time {
            color: var(--text-muted);
            font-size: 12px;
        }
        .guide-info h3 {
            font-size: 15px;
            font-weight: 700;
            line-height: 1.5;
            margin-bottom: 6px;
        }
        .guide-info h3 a {
            color: var(--text);
            text-decoration: none;
        }
        .guide-info p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .guide-footer {
            display: flex;
            gap: 18px;
            font-size: 12px;
            color: var(--text-muted);
        }
        .guide-footer i {
            margin-right: 4px;
            font-size: 11px;
        }

        /* ===== Scene ===== */
        .scene-section {
            background: var(--bg-0);
            padding: 80px 40px;
        }
        .scene-card {
            background: var(--bg-1);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 26px 22px;
            height: 100%;
            transition: all var(--trans);
            text-align: center;
        }
        .scene-card:hover {
            transform: translateY(-2px);
            border-color: var(--border-strong);
            box-shadow: var(--shadow-card);
        }
        .scene-card i {
            font-size: 28px;
            color: var(--accent);
            margin-bottom: 14px;
        }
        .scene-card h3 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text);
        }
        .scene-card p {
            font-size: 13px;
            line-height: 1.75;
            color: var(--text-secondary);
        }

        /* ===== Steps ===== */
        .steps-section {
            background: var(--bg-1);
            padding: 80px 40px;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .step-item {
            position: relative;
            padding: 24px 20px;
            background: var(--bg-0);
            border-radius: var(--radius-card);
            border: 1px solid var(--border);
            transition: all var(--trans);
        }
        .step-item:hover {
            border-color: var(--primary);
            box-shadow: var(--glow-primary);
            transform: translateY(-2px);
        }
        .step-num {
            font-size: 13px;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: 2px;
            display: block;
            margin-bottom: 12px;
        }
        .step-item h3 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
        }
        .step-item p {
            font-size: 13px;
            line-height: 1.7;
            color: var(--text-secondary);
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg-0);
            padding: 80px 40px;
        }
        .faq-wrap {
            max-width: 720px;
            margin: 0 auto;
        }
        .faq-item {
            border-bottom: 1px solid var(--border);
        }
        .faq-q {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 16px;
            background: none;
            border: none;
            color: var(--text);
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            text-align: left;
            transition: color var(--trans);
            font-family: inherit;
        }
        .faq-q:hover {
            color: var(--primary-hover);
        }
        .faq-q i {
            font-size: 13px;
            color: var(--text-muted);
            transition: transform var(--trans), color var(--trans);
            flex-shrink: 0;
        }
        .faq-item.open .faq-q {
            color: var(--primary);
        }
        .faq-item.open .faq-q i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-a {
            display: none;
            padding: 0 16px 20px;
            font-size: 14px;
            line-height: 1.8;
            color: var(--text-secondary);
        }
        .faq-item.open .faq-a {
            display: block;
            animation: fadeSlide .2s ease;
        }
        @keyframes fadeSlide {
            from {
                opacity: 0;
                transform: translateY(-6px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* ===== Other Categories ===== */
        .other-cats {
            background: var(--bg-1);
            border-top: 1px solid var(--border);
            padding: 32px 40px;
            text-align: center;
        }
        .other-cats span {
            font-size: 14px;
            color: var(--text-secondary);
            margin-right: 8px;
        }
        .other-cats a {
            display: inline-block;
            margin: 4px 10px;
            padding: 6px 18px;
            border-radius: var(--radius-tag);
            background: var(--bg-2);
            color: var(--text);
            font-size: 13px;
            font-weight: 600;
            border: 1px solid var(--border);
            transition: all var(--trans);
        }
        .other-cats a:hover {
            border-color: var(--primary);
            color: var(--primary-hover);
            transform: translateY(-1px);
        }

        /* ===== CTA ===== */
        .cta-section {
            position: relative;
            background: var(--bg-0);
            padding: 96px 40px;
            text-align: center;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            width: 640px;
            height: 640px;
            transform: translate(-50%, -50%);
            background: radial-gradient(circle, rgba(255, 77, 28, .08) 0%, transparent 70%);
            pointer-events: none;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: clamp(24px, 3vw, 34px);
            font-weight: 800;
            margin-bottom: 14px;
            color: var(--text);
        }
        .cta-section p {
            font-size: 15px;
            color: var(--text-secondary);
            margin-bottom: 32px;
            max-width: 480px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-actions {
            display: flex;
            justify-content: center;
            gap: 14px;
            flex-wrap: wrap;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-1);
            border-top: 1px solid var(--border);
            padding: 48px 0 28px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 32px;
            border-bottom: 1px solid var(--border);
        }
        .footer-brand p {
            font-size: 13px;
            line-height: 1.8;
            color: var(--text-secondary);
            max-width: 360px;
            margin-top: 12px;
        }
        .footer-title {
            font-size: 14px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 14px;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 8px;
        }
        .footer-links a {
            font-size: 13px;
            color: var(--text-secondary);
            transition: color var(--trans);
        }
        .footer-links a:hover {
            color: var(--primary-hover);
        }
        .footer-bottom {
            padding-top: 24px;
            font-size: 12px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
        }
        .footer-bottom a {
            color: var(--text-muted);
        }
        .footer-bottom a:hover {
            color: var(--primary-hover);
        }

        /* ===== Float CTA ===== */
        .float-cta {
            position: fixed;
            right: 26px;
            bottom: 26px;
            z-index: 140;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--primary);
            color: #0A0C12;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            box-shadow: 0 8px 24px rgba(255, 77, 28, .35);
            opacity: 0;
            visibility: hidden;
            transform: scale(.85);
            transition: all .25s ease;
            text-decoration: none;
        }
        .float-cta.show {
            opacity: 1;
            visibility: visible;
            transform: scale(1);
        }
        .float-cta:hover {
            transform: scale(1.06);
            box-shadow: var(--glow-primary);
            color: #0A0C12;
        }
        .float-cta:active {
            transform: scale(.94);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1023.98px) {
            .sidebar {
                transform: translateX(-100%);
                box-shadow: none;
            }
            .sidebar.open {
                transform: translateX(0);
                box-shadow: 4px 0 30px rgba(0, 0, 0, .45);
            }
            .sidebar-overlay.show {
                opacity: 1;
                visibility: visible;
            }
            .mobile-header {
                display: flex;
            }
            .main-content {
                margin-left: 0;
                padding-top: 56px;
            }
            .page-hero {
                padding: 64px 24px 56px;
            }
            .features-section,
            .guides-section,
            .scene-section,
            .steps-section,
            .faq-section,
            .cta-section {
                padding: 56px 24px;
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 639.98px) {
            .page-hero {
                padding: 48px 16px 44px;
            }
            .page-hero h1 {
                font-size: 28px;
            }
            .hero-sub {
                font-size: 14px;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .hero-stats {
                gap: 18px;
            }
            .hero-stats strong {
                font-size: 20px;
            }
            .guide-item {
                flex-direction: column;
            }
            .guide-thumb {
                width: 100%;
                height: auto;
                aspect-ratio: 16 / 9;
            }
            .features-section,
            .guides-section,
            .scene-section,
            .steps-section,
            .faq-section,
            .cta-section {
                padding: 44px 16px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                justify-content: center;
                text-align: center;
            }
            .other-cats {
                padding: 24px 16px;
            }
            .float-cta {
                right: 16px;
                bottom: 16px;
                width: 52px;
                height: 52px;
            }
        }

/* roulang page: category3 */
:root {
            --bg-0: #0A0C12;
            --bg-1: #111722;
            --bg-2: #1A2230;
            --primary: #FF4D1C;
            --primary-hover: #FF6A3D;
            --primary-dim: rgba(255, 77, 28, .15);
            --accent: #33E6FF;
            --text: #F4F6FA;
            --text-secondary: #A8B4C8;
            --text-muted: #6E7B90;
            --border: rgba(255, 255, 255, .08);
            --border-strong: rgba(255, 255, 255, .18);
            --radius-card: 14px;
            --radius-btn: 10px;
            --radius-tag: 20px;
            --shadow-card: 0 4px 20px rgba(0, 0, 0, .35);
            --glow-primary: 0 0 0 1px rgba(255, 77, 28, .25), 0 0 24px rgba(255, 77, 28, .12);
            --font-base: "Inter", "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", sans-serif;
            --sidebar-width: 240px;
            --header-height: 56px;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background: var(--bg-0);
            color: var(--text);
            font-family: var(--font-base);
            font-size: 15px;
            line-height: 1.8;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: inherit;
            text-decoration: none;
        }
        img {
            max-width: 100%;
            display: block;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            color: inherit;
        }
        ul,
        ol {
            list-style: none;
        }

        .grid-container.container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .main-content {
            margin-left: var(--sidebar-width);
            min-height: 100vh;
        }

        .sidebar-nav {
            position: fixed;
            left: 0;
            top: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--bg-1);
            border-right: 1px solid var(--border);
            display: flex;
            flex-direction: column;
            padding: 24px 16px;
            z-index: 100;
        }

        .logo-mark {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 8px 12px;
            margin-bottom: 32px;
            border-radius: 12px;
            transition: background .2s;
        }
        .logo-mark:hover {
            background: rgba(255, 255, 255, .04);
        }
        .logo-icon {
            width: 34px;
            height: 34px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), #FF8A50);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0A0C12;
            font-size: 16px;
            box-shadow: var(--glow-primary);
        }
        .logo-name {
            font-size: 19px;
            font-weight: 800;
            letter-spacing: .02em;
        }
        .logo-name span {
            color: var(--primary);
        }

        .sidebar-links {
            display: flex;
            flex-direction: column;
            gap: 4px;
            flex: 1;
        }
        .nav-link {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 11px 12px;
            color: var(--text-secondary);
            font-size: 14px;
            font-weight: 600;
            border-radius: 10px;
            border-left: 3px solid transparent;
            transition: background .2s, color .2s, transform .2s;
        }
        .nav-link i {
            width: 18px;
            text-align: center;
            font-size: 14px;
            color: var(--text-muted);
            transition: color .2s;
        }
        .nav-link:hover {
            background: rgba(255, 255, 255, .06);
            color: var(--text);
        }
        .nav-link:hover i {
            color: var(--accent);
        }
        .nav-link.active {
            background: var(--primary-dim);
            border-left-color: var(--primary);
            color: var(--text);
        }
        .nav-link.active i {
            color: var(--primary);
        }
        .nav-link:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        .sidebar-footer {
            border-top: 1px solid var(--border);
            padding-top: 16px;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .external-link {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 10px 12px;
            color: var(--text-muted);
            font-size: 13px;
            border-radius: 8px;
            transition: background .2s, color .2s;
        }
        .external-link:hover {
            background: rgba(255, 255, 255, .04);
            color: var(--accent);
        }
        .external-link i {
            width: 16px;
            text-align: center;
        }

        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-height);
            background: rgba(10, 12, 18, .92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            align-items: center;
            justify-content: space-between;
            padding: 0 16px;
            z-index: 200;
        }
        .mobile-logo {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .mobile-logo .logo-name {
            font-size: 17px;
        }
        .menu-toggle {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text);
            font-size: 18px;
            transition: background .2s;
        }
        .menu-toggle:hover {
            background: rgba(255, 255, 255, .08);
        }
        .menu-toggle:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }
        .nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, .55);
            z-index: 150;
        }

        section {
            padding: 96px 0;
        }

        .hero-section {
            position: relative;
            min-height: 90vh;
            display: flex;
            align-items: center;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            padding: 96px 0 80px;
        }
        .hero-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(100deg, rgba(10, 12, 18, .88) 30%, rgba(10, 12, 18, .45) 70%, rgba(10, 12, 18, .6) 100%);
        }
        .hero-content {
            position: relative;
            max-width: 680px;
            z-index: 2;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary-dim);
            border: 1px solid rgba(255, 77, 28, .3);
            color: var(--primary-hover);
            padding: 6px 14px;
            border-radius: var(--radius-tag);
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 24px;
        }
        .hero-section h1 {
            font-size: clamp(30px, 4.5vw, 46px);
            line-height: 1.15;
            font-weight: 800;
            margin-bottom: 20px;
            letter-spacing: .01em;
        }
        .hero-section h1 .gradient-text {
            background: linear-gradient(90deg, var(--primary), #FF8A50);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        .geo-dot {
            display: inline-block;
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: #FFD166;
            box-shadow: 0 0 10px rgba(255, 209, 102, .7);
            margin-right: 6px;
            vertical-align: middle;
        }
        .hero-subtitle {
            font-size: 17px;
            color: var(--text-secondary);
            margin-bottom: 32px;
            max-width: 560px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 36px;
        }
        .hero-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 0 28px;
            height: 48px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 700;
            transition: all .2s ease;
            outline: none;
        }
        .btn:focus-visible {
            box-shadow: 0 0 0 2px var(--accent);
        }
        .btn:active {
            transform: scale(.97);
        }
        .btn-primary {
            background: var(--primary);
            color: #0A0C12;
        }
        .btn-primary:hover {
            background: var(--primary-hover);
            box-shadow: var(--glow-primary);
        }
        .btn-ghost {
            background: var(--bg-2);
            color: var(--text);
            border: 1px solid var(--border-strong);
        }
        .btn-ghost:hover {
            border-color: var(--primary);
            color: var(--primary-hover);
        }

        .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--bg-2);
            border: 1px solid var(--border);
            border-radius: var(--radius-tag);
            padding: 6px 14px;
            font-size: 13px;
            color: var(--text-secondary);
        }
        .tag-accent {
            color: var(--accent);
            border-color: rgba(51, 230, 255, .3);
            background: rgba(51, 230, 255, .08);
        }

        .section-head {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 56px;
        }
        .section-kicker {
            display: inline-block;
            font-size: 12px;
            font-weight: 700;
            letter-spacing: .18em;
            color: var(--primary);
            margin-bottom: 12px;
            background: var(--primary-dim);
            padding: 6px 16px 6px 20px;
            clip-path: polygon(10px 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
        }
        .section-head h2 {
            font-size: clamp(22px, 3vw, 32px);
            font-weight: 700;
            line-height: 1.25;
            margin-bottom: 14px;
        }
        .section-desc {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        .feature-grid {
            display: flex;
            flex-direction: column;
            gap: 64px;
        }
        .feature-row {
            display: flex;
            align-items: center;
            gap: 56px;
        }
        .feature-row.row-reverse {
            flex-direction: row-reverse;
        }
        .feature-media {
            flex: 1;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
        }
        .feature-media img {
            width: 100%;
            height: 320px;
            object-fit: cover;
            filter: saturate(.9);
            transition: transform .4s ease;
        }
        .feature-media:hover img {
            transform: scale(1.02);
        }
        .feature-body {
            flex: 1;
        }
        .feature-body h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .feature-body p {
            color: var(--text-secondary);
            margin-bottom: 20px;
            font-size: 14px;
            line-height: 1.9;
        }
        .feature-points {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .feature-points li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text);
        }
        .feature-points li i {
            color: var(--accent);
        }

        .stats-section {
            background: var(--bg-1);
            border-block: 1px solid var(--border);
            position: relative;
        }
        .stats-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 70% 40%, rgba(51, 230, 255, .06), transparent 60%);
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            position: relative;
        }
        .stat-card {
            text-align: center;
            padding: 32px 20px;
            border-radius: var(--radius-card);
            transition: transform .2s, border-color .2s;
            background: rgba(255, 255, 255, .02);
            border: 1px solid var(--border);
        }
        .stat-card:hover {
            transform: translateY(-2px);
            border-color: var(--border-strong);
        }
        .stat-number {
            font-size: 74px;
            font-weight: 800;
            line-height: 1.1;
            background: linear-gradient(135deg, var(--primary), #FF8A50);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            display: block;
        }
        .stat-card:nth-child(2) .stat-number {
            background: linear-gradient(135deg, var(--accent), #7BE9FF);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        .stat-card:nth-child(3) .stat-number {
            background: linear-gradient(135deg, #FFD166, #FFB347);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        .stat-label {
            display: block;
            margin-top: 12px;
            font-size: 14px;
            color: var(--text-secondary);
        }

        .timeline {
            position: relative;
            max-width: 820px;
            margin: 0 auto;
            padding-left: 32px;
        }
        .timeline::before {
            content: "";
            position: absolute;
            left: 12px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: linear-gradient(var(--primary), var(--accent));
            opacity: .5;
        }
        .timeline-item {
            position: relative;
            margin-bottom: 40px;
        }
        .timeline-dot {
            position: absolute;
            left: -28px;
            top: 8px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--primary);
            box-shadow: 0 0 0 4px var(--primary-dim);
        }
        .timeline-card {
            background: var(--bg-1);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 24px 28px;
            transition: border-color .2s, transform .2s;
        }
        .timeline-card:hover {
            border-color: var(--border-strong);
            transform: translateX(4px);
        }
        .timeline-card .card-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: var(--radius-tag);
            margin-bottom: 12px;
        }
        .tag-primary {
            color: var(--primary-hover);
            border: 1px solid rgba(255, 77, 28, .35);
            background: var(--primary-dim);
        }
        .tag-accent {
            color: var(--accent);
            border-color: rgba(51, 230, 255, .3);
            background: rgba(51, 230, 255, .08);
        }
        .tag-warning {
            color: #FFD166;
            border: 1px solid rgba(255, 209, 102, .3);
            background: rgba(255, 209, 102, .08);
        }
        .timeline-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .timeline-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        .audience-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .audience-card {
            background: var(--bg-1);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 32px 28px;
            transition: transform .2s, border-color .2s;
        }
        .audience-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-strong);
        }
        .audience-icon {
            width: 46px;
            height: 46px;
            border-radius: 12px;
            background: var(--primary-dim);
            border: 1px solid rgba(255, 77, 28, .25);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            margin-bottom: 20px;
        }
        .audience-card:nth-child(2) .audience-icon {
            background: rgba(51, 230, 255, .1);
            border-color: rgba(51, 230, 255, .25);
            color: var(--accent);
        }
        .audience-card:nth-child(3) .audience-icon {
            background: rgba(255, 209, 102, .1);
            border-color: rgba(255, 209, 102, .25);
            color: #FFD166;
        }
        .audience-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .audience-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .step-item {
            background: var(--bg-2);
            border-radius: var(--radius-card);
            padding: 36px 28px;
            position: relative;
            border: 1px solid var(--border);
            transition: border-color .2s, transform .2s;
        }
        .step-item:hover {
            border-color: var(--primary);
            transform: translateY(-4px);
        }
        .step-num {
            font-size: 42px;
            font-weight: 800;
            color: transparent;
            -webkit-text-stroke: 2px var(--primary);
            display: block;
            margin-bottom: 16px;
            font-family: var(--font-base);
        }
        .step-item h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .step-item p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        .faq-wrapper {
            max-width: 720px;
            margin: 0 auto;
        }
        .faq-item {
            border-bottom: 1px solid var(--border);
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            width: 100%;
            padding: 20px 16px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            text-align: left;
            transition: color .2s;
            outline: none;
        }
        .faq-question:focus-visible {
            box-shadow: 0 0 0 2px var(--accent);
            border-radius: 8px;
        }
        .faq-question:hover {
            color: var(--primary-hover);
        }
        .faq-question i {
            color: var(--text-muted);
            transition: transform .2s ease;
        }
        .faq-item.active .faq-question {
            color: var(--primary);
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .2s ease;
            padding: 0 16px;
        }
        .faq-answer p {
            padding-bottom: 20px;
            font-size: 14px;
            line-height: 1.8;
            color: var(--text-secondary);
        }

        .cta-section {
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(255, 77, 28, .12), transparent 70%);
        }
        .cta-inner {
            position: relative;
            text-align: center;
            max-width: 680px;
            margin: 0 auto;
            padding: 32px 0;
        }
        .cta-inner h2 {
            font-size: clamp(24px, 3vw, 34px);
            font-weight: 800;
            margin-bottom: 16px;
        }
        .cta-inner p {
            color: var(--text-secondary);
            margin-bottom: 32px;
            font-size: 15px;
        }
        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }

        .site-footer {
            border-top: 1px solid var(--border);
            background: var(--bg-1);
            margin-left: var(--sidebar-width);
            padding: 64px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 48px;
        }
        .footer-brand p {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.8;
        }
        .footer-title {
            font-size: 13px;
            font-weight: 700;
            letter-spacing: .06em;
            color: var(--text);
            margin-bottom: 16px;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a {
            color: var(--text-secondary);
            font-size: 14px;
            transition: color .2s;
        }
        .footer-links a:hover {
            color: var(--primary-hover);
        }
        .footer-bottom {
            border-top: 1px solid var(--border);
            padding-top: 24px;
            text-align: center;
            color: var(--text-muted);
            font-size: 13px;
        }
        .footer-bottom a {
            color: var(--text-muted);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }

        @media (max-width: 1023px) {
            .mobile-header {
                display: flex;
            }
            .main-content {
                margin-left: 0;
                padding-top: var(--header-height);
            }
            .site-footer {
                margin-left: 0;
            }
            .sidebar-nav {
                transform: translateX(-100%);
                transition: transform .25s ease;
                box-shadow: 4px 0 24px rgba(0, 0, 0, .4);
            }
            .sidebar-nav.open {
                transform: translateX(0);
            }
            .nav-overlay.show {
                display: block;
            }
            section {
                padding: 64px 0;
            }
            .feature-row,
            .feature-row.row-reverse {
                flex-direction: column;
                gap: 32px;
            }
            .feature-media img {
                height: 240px;
            }
            .stats-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 16px;
            }
            .stat-number {
                font-size: 48px;
            }
            .hero-section {
                min-height: 70vh;
            }
        }

        @media (min-width: 1024px) {
            .nav-overlay,
            .mobile-header {
                display: none !important;
            }
        }

        @media (max-width: 767px) {
            section {
                padding: 48px 0;
            }
            .grid-container.container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .stat-number {
                font-size: 44px;
            }
            .audience-grid,
            .steps-grid,
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .hero-section h1 {
                font-size: 28px;
            }
            .hero-actions {
                flex-direction: column;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .feature-row {
                gap: 24px;
            }
            .feature-media img {
                height: 200px;
            }
            .timeline {
                padding-left: 24px;
            }
            .timeline-dot {
                left: -24px;
            }
            .footer-grid {
                gap: 32px;
            }
        }

        @media (max-width: 520px) {
            .hero-badges {
                flex-direction: column;
                align-items: flex-start;
            }
            .hero-actions .btn {
                padding: 0 20px;
                font-size: 14px;
            }
            .timeline-card {
                padding: 20px;
            }
            .section-head {
                margin-bottom: 40px;
            }
        }

/* roulang page: category4 */
:root {
            --bg-0: #0A0C12;
            --bg-1: #111722;
            --bg-2: #1A2230;
            --primary: #FF4D1C;
            --primary-hover: #FF6A3D;
            --primary-dim: rgba(255, 77, 28, .15);
            --accent: #33E6FF;
            --text: #F4F6FA;
            --text-secondary: #A8B4C8;
            --text-muted: #6E7B90;
            --border: rgba(255, 255, 255, .08);
            --border-strong: rgba(255, 255, 255, .18);
            --radius-card: 14px;
            --radius-btn: 10px;
            --shadow-card: 0 4px 20px rgba(0, 0, 0, .35);
            --glow-primary: 0 0 0 1px rgba(255, 77, 28, .25), 0 0 24px rgba(255, 77, 28, .12);
            --sidebar-width: 240px;
            --font-stack: "Inter", "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            margin: 0;
            font-family: var(--font-stack);
            font-size: 16px;
            line-height: 1.8;
            background: var(--bg-0);
            color: var(--text);
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: var(--accent);
            text-decoration: none;
            transition: color .2s ease, border-color .2s ease, background .2s ease;
        }
        a:hover {
            color: var(--primary-hover);
        }
        a:focus,
        button:focus {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }
        p {
            margin: 0 0 16px;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .section {
            padding: 80px 0;
            position: relative;
        }
        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 1px;
            text-transform: uppercase;
            color: var(--accent);
            background: rgba(51, 230, 255, .08);
            border-radius: 20px;
            padding: 4px 14px;
            margin-bottom: 16px;
        }
        .section-title {
            font-size: clamp(24px, 3vw, 34px);
            font-weight: 800;
            line-height: 1.25;
            color: var(--text);
            margin: 0 0 12px;
        }
        .section-subtitle {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 620px;
            margin: 0 0 40px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 48px;
            padding: 0 28px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 700;
            border: 1px solid transparent;
            cursor: pointer;
            transition: all .2s ease;
            white-space: nowrap;
            text-decoration: none;
        }
        .btn i {
            font-size: 14px;
        }
        .btn-primary {
            background: var(--primary);
            color: #0A0C12;
        }
        .btn-primary:hover {
            background: var(--primary-hover);
            box-shadow: var(--glow-primary);
            color: #0A0C12;
        }
        .btn-primary:active {
            filter: brightness(.95);
        }
        .btn-secondary {
            background: var(--bg-2);
            border-color: var(--border-strong);
            color: var(--text);
        }
        .btn-secondary:hover {
            border-color: var(--primary);
            background: rgba(255, 77, 28, .08);
            color: var(--primary-hover);
        }
        .btn-lg {
            height: 54px;
            padding: 0 36px;
            font-size: 16px;
        }
        /* ========== 左侧导航 ========== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            width: var(--sidebar-width);
            background: var(--bg-1);
            border-right: 1px solid var(--border);
            display: flex;
            flex-direction: column;
            z-index: 100;
            transition: transform .25s ease;
        }
        .sidebar-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 24px 20px 20px;
            border-bottom: 1px solid var(--border);
        }
        .sidebar-logo:hover {
            color: var(--text);
        }
        .logo-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), #FF8A50);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0A0C12;
            font-size: 18px;
            flex-shrink: 0;
        }
        .logo-name {
            font-size: 20px;
            font-weight: 800;
            color: var(--text);
        }
        .logo-name span {
            color: var(--primary);
        }
        .sidebar-nav {
            flex: 1;
            padding: 16px 12px;
            display: flex;
            flex-direction: column;
            gap: 2px;
            overflow-y: auto;
        }
        .nav-link {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 11px 16px;
            border-radius: 10px;
            color: var(--text-secondary);
            font-size: 14px;
            font-weight: 600;
            border-left: 3px solid transparent;
            transition: all .2s ease;
        }
        .nav-link i {
            width: 20px;
            text-align: center;
            font-size: 15px;
            color: var(--text-muted);
            transition: color .2s ease;
        }
        .nav-link:hover {
            background: rgba(255, 255, 255, .06);
            color: var(--text);
        }
        .nav-link:hover i {
            color: var(--primary);
        }
        .nav-link.active {
            background: var(--primary-dim);
            border-left-color: var(--primary);
            color: var(--text);
        }
        .nav-link.active i {
            color: var(--primary);
        }
        .sidebar-footer {
            padding: 16px 20px;
            border-top: 1px solid var(--border);
            font-size: 13px;
            color: var(--text-muted);
        }
        .sidebar-footer a {
            color: var(--text-muted);
        }
        .sidebar-footer a:hover {
            color: var(--primary);
        }
        /* ========== 移动端头部 ========== */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 56px;
            background: var(--bg-1);
            border-bottom: 1px solid var(--border);
            align-items: center;
            justify-content: space-between;
            padding: 0 16px;
            z-index: 101;
        }
        .mobile-logo {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .mobile-logo .logo-icon {
            width: 34px;
            height: 34px;
            font-size: 15px;
            border-radius: 8px;
        }
        .mobile-logo .logo-name {
            font-size: 18px;
        }
        .menu-toggle {
            background: none;
            border: none;
            color: var(--text);
            font-size: 20px;
            width: 40px;
            height: 40px;
            border-radius: 8px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: background .2s ease;
        }
        .menu-toggle:hover {
            background: rgba(255, 255, 255, .08);
        }
        .sidebar-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, .5);
            z-index: 99;
        }
        .sidebar-overlay.show {
            display: block;
        }
        /* ========== 主内容区 ========== */
        .main-content {
            margin-left: var(--sidebar-width);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        /* ========== Hero ========== */
        .page-hero {
            position: relative;
            background: url('/assets/images/backpic/back-1.png') no-repeat center center/cover;
            padding: 100px 0 80px;
            display: flex;
            align-items: center;
            min-height: 520px;
        }
        .page-hero::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(10, 12, 18, .75);
        }
        .hero-content {
            position: relative;
            z-index: 1;
            max-width: 720px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary-dim);
            color: var(--primary-hover);
            border: 1px solid rgba(255, 77, 28, .35);
            border-radius: 20px;
            padding: 6px 16px;
            font-size: 13px;
            font-weight: 700;
            margin-bottom: 20px;
        }
        .hero-badge i {
            font-size: 12px;
        }
        .hero-title {
            font-size: clamp(30px, 4.5vw, 46px);
            line-height: 1.15;
            font-weight: 800;
            margin: 0 0 16px;
            color: var(--text);
        }
        .hero-title .text-gradient {
            background: linear-gradient(120deg, var(--primary), #FF8A50);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero-desc {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.9;
            margin-bottom: 32px;
            max-width: 560px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 40px;
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
        }
        .hero-stat strong {
            display: block;
            font-size: 30px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
        }
        .hero-stat span {
            font-size: 13px;
            color: var(--text-muted);
        }
        /* ========== 数据证据 ========== */
        .stats-board {
            background: var(--bg-1);
            border-radius: var(--radius-card);
            padding: 48px 24px;
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            justify-content: space-around;
            clip-path: polygon(0 0, calc(100% - 24px) 0, 100% 24px, 100% 100%, 24px 100%, 0 calc(100% - 24px));
            border: 1px solid var(--border);
        }
        .stat-item {
            text-align: center;
            padding: 0 24px;
        }
        .stat-item .stat-num {
            font-size: 74px;
            font-weight: 800;
            line-height: 1.1;
            background: linear-gradient(180deg, var(--primary), #FF8A50);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .stat-item:nth-child(2) .stat-num {
            background: linear-gradient(180deg, var(--accent), #66EEFF);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .stat-item .stat-label {
            font-size: 14px;
            color: var(--text-secondary);
            margin-top: 8px;
        }
        /* ========== 卖点卡 ========== */
        .feature-card {
            background: var(--bg-1);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            height: 100%;
            transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
        }
        .feature-card:hover {
            transform: translateY(-2px);
            border-color: var(--border-strong);
            box-shadow: var(--shadow-card);
        }
        .feature-card .f-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--primary-dim);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--primary);
            margin-bottom: 16px;
        }
        .feature-card h3 {
            font-size: 17px;
            font-weight: 700;
            margin: 0 0 8px;
            color: var(--text);
        }
        .feature-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }
        .feature-card .f-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 12px;
            font-size: 12px;
            color: var(--accent);
        }
        .feature-card .f-tag .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: #FF8A50;
        }
        /* ========== 场景卡 ========== */
        .scene-card {
            background: var(--bg-1);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 24px;
            height: 100%;
            transition: all .2s ease;
        }
        .scene-card:hover {
            border-color: rgba(255, 77, 28, .5);
            box-shadow: var(--glow-primary);
            transform: translateY(-2px);
        }
        .scene-card .scene-num {
            font-size: 13px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 1px;
        }
        .scene-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin: 8px 0 8px;
            color: var(--text);
        }
        .scene-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }
        .scene-card .scene-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: rgba(51, 230, 255, .1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 16px;
            margin-bottom: 12px;
        }
        /* ========== 流程 ========== */
        .steps-row {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
        }
        .step-item {
            background: var(--bg-1);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            position: relative;
            text-align: center;
            flex: 1;
            min-width: 200px;
            transition: border-color .2s ease, transform .2s ease;
        }
        .step-item:hover {
            border-color: var(--primary);
            transform: translateY(-2px);
        }
        .step-num {
            width: 44px;
            height: 44px;
            margin: 0 auto 12px;
            border-radius: 50%;
            background: var(--primary);
            color: #0A0C12;
            font-size: 18px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .step-item h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            margin: 0 0 8px;
        }
        .step-item p {
            font-size: 13px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.6;
        }
        .step-arrow {
            display: flex;
            align-items: center;
            color: var(--primary);
            font-size: 20px;
            padding-top: 40px;
        }
        /* ========== 活动精选卡片 ========== */
        .event-card {
            background: var(--bg-1);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            overflow: hidden;
            height: 100%;
            transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
        }
        .event-card:hover {
            transform: translateY(-3px);
            border-color: var(--border-strong);
            box-shadow: var(--shadow-card);
        }
        .event-thumb {
            width: 100%;
            aspect-ratio: 16/10;
            object-fit: cover;
            overflow: hidden;
        }
        .event-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .3s ease;
        }
        .event-card:hover .event-thumb img {
            transform: scale(1.03);
        }
        .event-body {
            padding: 20px 20px 24px;
        }
        .event-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 600;
            color: #FF8A50;
            background: rgba(255, 138, 80, .1);
            border-radius: 20px;
            padding: 3px 10px;
            margin-bottom: 10px;
        }
        .event-tag .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: #FF8A50;
        }
        .event-body h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text);
            margin: 0 0 8px;
        }
        .event-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 12px;
        }
        .event-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-muted);
            border-top: 1px solid var(--border);
            padding-top: 12px;
        }
        .event-meta .btn-link {
            color: var(--primary);
            font-weight: 600;
            font-size: 13px;
        }
        .event-meta .btn-link:hover {
            color: var(--primary-hover);
        }
        /* ========== FAQ ========== */
        .faq-wrap {
            max-width: 720px;
            margin: 0 auto;
        }
        .faq-item {
            border-bottom: 1px solid var(--border);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 16px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            border: none;
            background: none;
            width: 100%;
            text-align: left;
            transition: color .2s ease;
        }
        .faq-question:hover,
        .faq-question.active {
            color: var(--primary);
        }
        .faq-question i {
            font-size: 14px;
            transition: transform .2s ease;
            color: var(--text-muted);
            flex-shrink: 0;
        }
        .faq-question.active i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .2s ease, padding .2s ease;
            padding: 0 16px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
        }
        .faq-answer.open {
            max-height: 300px;
            padding-bottom: 20px;
        }
        /* ========== CTA ========== */
        .cta-section {
            background: var(--bg-1);
            border-radius: var(--radius-card);
            text-align: center;
            padding: 64px 24px;
            position: relative;
            overflow: hidden;
            border: 1px solid var(--border);
        }
        .cta-section::before {
            content: "";
            position: absolute;
            top: -60px;
            left: 50%;
            transform: translateX(-50%);
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(255, 77, 28, .08);
            filter: blur(60px);
            pointer-events: none;
        }
        .cta-section h2 {
            font-size: clamp(24px, 3vw, 34px);
            font-weight: 800;
            color: var(--text);
            margin-bottom: 12px;
            position: relative;
        }
        .cta-section p {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 480px;
            margin: 0 auto 32px;
            position: relative;
        }
        .cta-actions {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
            position: relative;
        }
        /* ========== Footer ========== */
        .site-footer {
            background: var(--bg-1);
            border-top: 1px solid var(--border);
            padding: 48px 0 0;
            margin-top: auto;
        }
        .footer-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            padding-bottom: 32px;
            border-bottom: 1px solid var(--border);
        }
        .footer-brand {
            flex: 1 1 280px;
        }
        .footer-brand .logo-mark {
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin: 16px 0 0;
            max-width: 320px;
        }
        .footer-title {
            font-size: 14px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 12px;
            letter-spacing: .5px;
        }
        .footer-links {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .footer-links li {
            margin-bottom: 8px;
        }
        .footer-links a {
            font-size: 14px;
            color: var(--text-muted);
        }
        .footer-links a:hover {
            color: var(--primary);
        }
        .footer-bottom {
            padding: 20px 0;
            font-size: 13px;
            color: var(--text-muted);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 8px;
        }
        .footer-bottom p {
            margin: 0;
        }
        /* ========== 浮动 CTA ========== */
        .float-cta {
            position: fixed;
            bottom: 32px;
            right: 32px;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--primary);
            color: #0A0C12;
            font-size: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            border: none;
            cursor: pointer;
            box-shadow: var(--glow-primary);
            z-index: 1000;
            opacity: 0;
            visibility: hidden;
            transform: scale(.8);
            transition: all .25s ease;
        }
        .float-cta.show {
            opacity: 1;
            visibility: visible;
            transform: scale(1);
        }
        .float-cta:hover {
            transform: scale(1.06);
            background: var(--primary-hover);
            color: #0A0C12;
        }
        /* ========== 分类色标 ========== */
        .cat-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            display: inline-block;
            margin-right: 4px;
            background: #FF8A50;
        }
        /* ========== 响应式 ========== */
        @media (max-width: 1024px) {
            .sidebar {
                transform: translateX(-100%);
                box-shadow: 4px 0 24px rgba(0, 0, 0, .4);
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .mobile-header {
                display: flex;
            }
            .main-content {
                margin-left: 0;
                padding-top: 56px;
            }
            .section {
                padding: 48px 0;
            }
        }
        @media (max-width: 640px) {
            .container {
                padding: 0 16px;
            }
            .hero-stats {
                gap: 16px;
            }
            .hero-stat strong {
                font-size: 22px;
            }
            .stat-item .stat-num {
                font-size: 48px;
            }
            .step-arrow {
                display: none;
            }
            .steps-row {
                gap: 16px;
            }
            .step-item {
                min-width: calc(50% - 16px);
            }
            .footer-grid {
                flex-direction: column;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
            .float-cta {
                bottom: 20px;
                right: 20px;
                width: 48px;
                height: 48px;
                font-size: 17px;
            }
        }
        @media (max-width: 420px) {
            .step-item {
                min-width: 100%;
            }
        }