/* roulang page: index */
/* ===== 设计变量 ===== */
:root {
    --bg: #F7FAFC;
    --surface: #FFFFFF;
    --primary: #3B82F6;
    --primary-light: #EFF6FF;
    --primary-dark: #1D4ED8;
    --secondary: #F59E0B;
    --text-main: #1E293B;
    --text-sub: #64748B;
    --border: #E2E8F0;
    --shadow-card: 0 4px 20px rgba(30, 41, 59, 0.06);
    --shadow-card-hover: 0 10px 30px rgba(30, 41, 59, 0.12);
    --radius: 16px;
    --radius-btn: 8px;
    --radius-tag: 999px;
    --font-base: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}
/* ===== Reset / Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font-base);
    font-size: 1rem;
    line-height: 1.75;
    color: var(--text-main);
    background-color: var(--bg);
    -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; display: block; }
button { font-family: inherit; }
ul, ol { list-style: none; }
.container { max-width: 1200px; padding-left: 20px; padding-right: 20px; }
/* ===== 通用组件 ===== */
.btn {
    display: inline-flex; align-items: center; justify-content: center;
    gap: 6px; font-weight: 600; border-radius: var(--radius-btn);
    transition: all .25s ease; border: 1px solid transparent;
}
.btn-primary {
    background: var(--primary); color: #fff;
    padding: 10px 22px; box-shadow: 0 4px 12px rgba(59,130,246,.25);
}
.btn-primary:hover { background: var(--primary-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 6px 18px rgba(29,78,216,.3); }
.btn-outline {
    background: #fff; color: var(--primary); border-color: var(--primary);
    padding: 10px 22px;
}
.btn-outline:hover { background: var(--primary-light); color: var(--primary-dark); }
.btn-cta {
    background: var(--secondary); color: #fff;
    padding: 12px 32px; font-size: 1.05rem;
    box-shadow: 0 4px 16px rgba(245,158,11,.3);
}
.btn-cta:hover { background: #D97706; color: #fff; transform: translateY(-2px); box-shadow: 0 8px 22px rgba(245,158,11,.36); }
.btn-sm { padding: 6px 14px; font-size: .875rem; }
.btn-hero { font-size: 1.05rem; padding: 12px 28px; }
.btn:focus-visible, .nav-toggle:focus-visible, .accordion-button:focus-visible {
    outline: none; box-shadow: 0 0 0 3px rgba(59,130,246,.3);
}
.tag {
    display: inline-block; background: var(--primary-light); color: var(--primary-dark);
    padding: 4px 14px; border-radius: var(--radius-tag);
    font-size: .8125rem; font-weight: 600; letter-spacing: .02em;
}
.section-padding { padding: 72px 0; }
.section-head { margin-bottom: 40px; }
.section-title { font-size: 2.25rem; font-weight: 700; line-height: 1.25; color: var(--text-main); }
.section-subtitle { font-size: 1rem; color: var(--text-sub); margin-top: 8px; }
.section-link { font-size: .875rem; font-weight: 600; color: var(--primary); }
.section-link:hover { color: var(--primary-dark); }
/* ===== 公告条 ===== */
.announce-bar {
    background: var(--primary-light); color: var(--primary-dark);
    font-size: .875rem; text-align: center; padding: 8px 40px;
    position: relative; z-index: 1031;
}
.announce-close {
    position: absolute; right: 14px; top: 50%; transform: translateY(-50%);
    background: none; border: none; color: var(--primary-dark); font-size: 1rem; cursor: pointer;
    line-height: 1;
}
/* ===== 导航 ===== */
.site-header {
    position: sticky; top: 0; z-index: 1030;
    background: rgba(255,255,255,.92);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
}
.nav-wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand {
    font-size: 1.3rem; font-weight: 700; color: var(--text-main);
    display: inline-flex; align-items: center; gap: 8px; letter-spacing: .01em;
}
.brand i { color: var(--primary); font-size: 1.45rem; }
.brand:hover { color: var(--primary); }
.nav-menu { display: flex; align-items: center; gap: 28px; margin: 0; padding: 0; }
.nav-menu .nav-link {
    font-size: .9375rem; font-weight: 500; color: var(--text-main);
    padding: 20px 0; position: relative; transition: color .2s;
}
.nav-menu .nav-link:hover { color: var(--primary); }
.nav-menu .nav-link.active { color: var(--primary); font-weight: 700; }
.nav-menu .nav-link.active::after {
    content: ""; position: absolute; left: 0; right: 0; bottom: 10px;
    height: 2px; background: var(--primary); border-radius: 2px;
}
.nav-menu .nav-cta .btn { padding: 8px 18px; }
.nav-toggle {
    display: none; background: none; border: none; cursor: pointer;
    padding: 6px; flex-direction: column; gap: 5px;
}
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--text-main); border-radius: 2px; transition: all .3s; }
/* ===== Hero ===== */
.hero-section {
    min-height: 88vh; padding: 72px 0 56px;
    background:
        linear-gradient(135deg, rgba(239,246,255,.94) 0%, rgba(247,250,252,.85) 55%, rgba(224,242,254,.7) 100%),
        url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
    position: relative; overflow: hidden;
    display: flex; align-items: center;
}
.hero-section::before {
    content: ""; position: absolute; width: 480px; height: 480px; border-radius: 50%;
    background: rgba(59,130,246,.08); top: -160px; right: -80px; pointer-events: none;
}
.hero-section::after {
    content: ""; position: absolute; width: 320px; height: 320px; border-radius: 50%;
    background: rgba(245,158,11,.06); bottom: -100px; left: -60px; pointer-events: none;
}
.hero-container { position: relative; z-index: 2; }
.hero-left { padding-right: 40px; }
.hero-badge {
    display: inline-flex; align-items: center; gap: 6px;
    background: rgba(255,255,255,.85); border: 1px solid var(--border);
    border-radius: var(--radius-tag); padding: 6px 16px;
    font-size: .875rem; font-weight: 600; color: var(--primary-dark);
    margin-bottom: 20px; box-shadow: var(--shadow-card);
}
.hero-badge i { color: var(--primary); }
.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700; line-height: 1.15;
    color: var(--text-main); margin-bottom: 16px; letter-spacing: .01em;
}
.hero-title .highlight { color: var(--primary); }
.hero-subtitle { font-size: 1.125rem; color: var(--text-sub); margin-bottom: 28px; max-width: 500px; }
.hero-cta { display: flex; gap: 16px; margin-bottom: 20px; }
.hero-scroll { display: block; font-size: .8125rem; color: var(--text-sub); margin-top: 12px; }
/* 手机模型 */
.hero-right { display: flex; justify-content: center; align-items: center; }
.phone-mockup { position: relative; }
.phone-frame {
    width: 260px; aspect-ratio: 9 / 19;
    background: #0F172A; border-radius: 36px; border: 8px solid #fff;
    box-shadow: 0 20px 50px rgba(30,41,59,.25); padding: 12px;
}
.phone-screen {
    width: 100%; height: 100%; border-radius: 24px; overflow: hidden;
    background: linear-gradient(180deg, #F1F5F9 0%, #EFF6FF 100%);
    display: flex; flex-direction: column; gap: 10px; padding: 10px;
}
.mini-video-card {
    flex: 1; border-radius: 12px; overflow: hidden; position: relative;
    box-shadow: 0 4px 12px rgba(30,41,59,.1);
}
.mini-video-card img { width: 100%; height: 100%; object-fit: cover; }
.mini-video-card .play-icon {
    position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%);
    width: 36px; height: 36px; background: rgba(255,255,255,.85); border-radius: 50%;
    display: flex; align-items: center; justify-content: center; color: var(--primary);
    font-size: .75rem;
}
.mini-video-card p {
    position: absolute; bottom: 6px; left: 8px; right: 8px;
    font-size: .7rem; color: #fff; font-weight: 600;
    text-shadow: 0 1px 4px rgba(0,0,0,.6); margin: 0;
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.mini-video-card.offset-1 { transform: rotate(4deg) translateY(-2px); }
.mini-video-card.offset-2 { transform: rotate(-3deg) translateY(2px); }
/* ===== 爆款片段卡 ===== */
.viral-section { background: var(--bg); }
.viral-card {
    border-radius: var(--radius); overflow: hidden;
    background: var(--surface); box-shadow: var(--shadow-card);
    transition: box-shadow .3s, transform .3s;
    height: 100%; display: flex; flex-direction: column; border: 1px solid var(--border);
}
.viral-card:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-4px); }
.viral-cover { position: relative; aspect-ratio: 2/3; overflow: hidden; }
.viral-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.viral-card:hover .viral-cover img { transform: scale(1.04); }
.viral-cover .viral-tag {
    position: absolute; top: 12px; left: 12px; z-index: 2;
    background: var(--primary-light); color: var(--primary-dark);
    font-size: .75rem; font-weight: 600; padding: 3px 12px; border-radius: 999px;
}
.viral-cover .viral-play {
    position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%);
    width: 44px; height: 44px; background: rgba(255,255,255,.9); border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    color: var(--primary); box-shadow: 0 4px 12px rgba(0,0,0,.15);
}
.viral-body { padding: 18px 16px 16px; flex: 1; display: flex; flex-direction: column; }
.viral-body h3 { font-size: 1.0625rem; font-weight: 600; margin-bottom: 8px; line-height: 1.4; }
.viral-stats { display: flex; gap: 14px; font-size: .8125rem; color: var(--text-sub); margin-bottom: 14px; }
.viral-stats i { margin-right: 4px; color: var(--primary); }
.viral-btn { margin-top: auto; }
/* ===== 种草清单 ===== */
.list-section { background: var(--surface); }
.list-left { padding-right: 30px; }
.list-left .section-title { font-size: 1.875rem; margin-bottom: 14px; }
.list-left p { color: var(--text-sub); font-size: .9375rem; margin-bottom: 20px; }
.list-left img { border-radius: var(--radius); box-shadow: var(--shadow-card); }
.list-right { display: flex; flex-direction: column; gap: 16px; }
.list-item {
    display: flex; align-items: center; gap: 16px;
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 18px 20px;
    transition: box-shadow .3s, transform .3s, border-color .3s;
    cursor: default;
}
.list-item:hover { box-shadow: var(--shadow-card-hover); transform: translateX(4px); border-color: var(--primary); }
.list-num {
    width: 40px; height: 40px; flex-shrink: 0; border-radius: 10px;
    background: var(--primary-light); color: var(--primary-dark);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.125rem; font-weight: 700;
}
.list-info { flex: 1; min-width: 0; }
.list-info h4 { font-size: 1rem; font-weight: 600; margin-bottom: 2px; }
.list-info p { font-size: .8125rem; color: var(--text-sub); margin: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.list-price {
    font-size: .75rem; font-weight: 700; color: var(--secondary);
    background: rgba(245,158,11,.1); padding: 4px 10px; border-radius: 999px; flex-shrink: 0;
}
.list-arrow { color: var(--primary); font-size: .875rem; flex-shrink: 0; }
/* ===== 最新资讯 CMS ===== */
.latest-section { background: var(--bg); }
.article-card {
    border-radius: var(--radius); overflow: hidden;
    background: var(--surface); border: 1px solid var(--border);
    box-shadow: var(--shadow-card); transition: box-shadow .3s, transform .3s;
    height: 100%; display: flex; flex-direction: column;
}
.article-card:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-4px); }
.article-thumb { aspect-ratio: 16/10; overflow: hidden; position: relative; }
.article-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.article-card:hover .article-thumb img { transform: scale(1.05); }
.article-thumb .tag { position: absolute; top: 12px; left: 12px; box-shadow: 0 2px 8px rgba(0,0,0,.1); }
.article-body { padding: 20px 20px 18px; flex: 1; display: flex; flex-direction: column; }
.article-body h3 { font-size: 1.0625rem; font-weight: 600; margin-bottom: 8px; line-height: 1.4; }
.article-body h3 a { color: var(--text-main); }
.article-body h3 a:hover { color: var(--primary); }
.article-body p { font-size: .875rem; color: var(--text-sub); line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 14px; }
.article-meta { margin-top: auto; display: flex; align-items: center; justify-content: space-between; font-size: .8125rem; color: var(--text-sub); }
.article-meta a { font-weight: 600; }
.empty-state {
    background: var(--surface); border: 1px dashed var(--border);
    border-radius: var(--radius); min-height: 220px;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    gap: 12px; color: var(--text-sub);
}
.empty-state .empty-icon {
    width: 56px; height: 56px; border-radius: 50%;
    background: var(--primary-light); color: var(--primary-dark);
    display: flex; align-items: center; justify-content: center; font-size: 1.6rem;
}
/* ===== 口碑评论 ===== */
.reviews-section { background: var(--surface); }
.review-slider { display: flex; gap: 20px; overflow-x: auto; padding-bottom: 16px; scroll-snap-type: x mandatory; }
.review-card {
    min-width: 300px; max-width: 340px; flex-shrink: 0;
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 24px;
    scroll-snap-align: start; box-shadow: var(--shadow-card);
}
.review-header { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.review-avatar {
    width: 44px; height: 44px; border-radius: 50%;
    background: linear-gradient(135deg, #DBEAFE, #BFDBFE);
    display: flex; align-items: center; justify-content: center;
    color: var(--primary-dark); font-weight: 700; font-size: .875rem;
}
.review-name { font-weight: 600; font-size: .9375rem; }
.review-time { font-size: .75rem; color: var(--text-sub); }
.review-stars { margin-left: auto; color: var(--secondary); font-size: .8125rem; }
.review-card p { font-size: .875rem; color: var(--text-main); line-height: 1.6; margin: 0; }
.trust-bar {
    margin-top: 40px; background: var(--primary-light);
    border-radius: var(--radius); padding: 28px 32px;
    display: flex; align-items: center; justify-content: space-around; flex-wrap: wrap; gap: 20px;
}
.trust-item { text-align: center; }
.trust-item .num { font-size: 1.875rem; font-weight: 700; color: var(--primary-dark); line-height: 1.2; }
.trust-item .label { font-size: .8125rem; color: var(--text-sub); }
/* ===== CTA ===== */
.cta-section {
    padding: 80px 0; text-align: center; position: relative;
    background:
        linear-gradient(135deg, rgba(239,246,255,.92), rgba(224,242,254,.88)),
        url('/assets/images/backpic/back-2.png') center/cover no-repeat;
}
.cta-section::before {
    content: ""; position: absolute; inset: 0;
    background: rgba(255,255,255,.35); pointer-events: none;
}
.cta-inner { position: relative; z-index: 2; max-width: 600px; margin: 0 auto; }
.cta-title { font-size: 2rem; font-weight: 700; color: var(--text-main); margin-bottom: 12px; }
.cta-subtitle { font-size: 1rem; color: var(--text-sub); margin-bottom: 28px; }
.cta-badges { display: flex; justify-content: center; gap: 24px; margin-top: 28px; flex-wrap: wrap; }
.cta-badge {
    display: flex; align-items: center; gap: 6px;
    font-size: .875rem; font-weight: 600; color: var(--text-main);
    background: #fff; padding: 8px 18px; border-radius: 999px;
    box-shadow: var(--shadow-card); border: 1px solid var(--border);
}
.cta-badge i { color: var(--primary); }
/* ===== FAQ ===== */
.faq-section { background: var(--bg); }
.faq-wrap { max-width: 780px; margin: 0 auto; }
.faq-wrap .accordion-item {
    border: 1px solid var(--border) !important; border-radius: var(--radius) !important;
    margin-bottom: 14px; overflow: hidden; background: var(--surface);
}
.faq-wrap .accordion-button {
    font-size: 1rem; font-weight: 600; color: var(--text-main);
    padding: 18px 22px; background: var(--surface);
    box-shadow: none !important; transition: background .2s;
}
.faq-wrap .accordion-button:not(.collapsed) {
    background: var(--primary-light); color: var(--primary-dark);
}
.faq-wrap .accordion-button::after {
    background-size: 14px; filter: hue-rotate(0deg);
}
.faq-wrap .accordion-body { padding: 0 22px 18px; color: var(--text-sub); font-size: .9375rem; line-height: 1.7; background: var(--surface); }
/* ===== 页脚 ===== */
.site-footer { background: #0F172A; color: #94A3B8; padding: 60px 0 0; }
.footer-top { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 40px; }
.footer-brand { font-size: 1.25rem; font-weight: 700; color: #fff; margin-bottom: 14px; display: flex; align-items: center; gap: 8px; }
.footer-brand i { color: var(--primary); }
.footer-desc { font-size: .875rem; line-height: 1.7; }
.footer-col h5 { color: #fff; font-size: .9375rem; font-weight: 600; margin-bottom: 16px; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a { color: #94A3B8; font-size: .875rem; transition: color .2s; }
.footer-col ul li a:hover { color: #fff; text-decoration: underline; }
.footer-bottom {
    border-top: 1px solid rgba(148,163,184,.15);
    padding: 20px 0; font-size: .8125rem; text-align: center; color: #64748B;
}
.footer-bottom span { margin: 0 6px; }
/* ===== 响应式 ===== */
@media (max-width: 991px) {
    .nav-toggle { display: flex; }
    .nav-menu {
        display: none; position: absolute; top: 64px; left: 0; right: 0;
        background: #fff; flex-direction: column; align-items: flex-start;
        padding: 20px 24px; gap: 0;
        border-bottom: 1px solid var(--border);
        box-shadow: 0 12px 24px rgba(30,41,59,.08);
    }
    .nav-menu.open { display: flex; }
    .nav-menu .nav-link { width: 100%; padding: 14px 0; font-size: 1.125rem; border-bottom: 1px solid #F1F5F9; }
    .nav-menu .nav-link.active::after { display: none; }
    .nav-menu .nav-link.active { color: var(--primary); background: var(--primary-light); padding-left: 12px; border-radius: 8px; }
    .nav-menu .nav-cta { width: 100%; padding-top: 16px; }
    .nav-menu .nav-cta .btn { width: 100%; }
    .hero-section { min-height: auto; padding: 56px 0 48px; }
    .hero-left { text-align: center; padding-right: 0; margin-bottom: 48px; }
    .hero-cta { justify-content: center; }
    .hero-subtitle { margin-left: auto; margin-right: auto; }
    .hero-right { justify-content: center; }
    .footer-top { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 767px) {
    .section-padding { padding: 48px 0; }
    .section-title { font-size: 1.625rem; }
    .list-left { padding-right: 0; margin-bottom: 32px; text-align: center; }
    .review-card { min-width: 260px; }
    .cta-title { font-size: 1.5rem; }
    .footer-top { grid-template-columns: 1fr; gap: 28px; }
}
@media (max-width: 575px) {
    .announce-bar { display: none; }
    .section-padding { padding: 40px 0; }
    .section-title { font-size: 1.5rem; }
    .hero-title { font-size: 2rem; }
    .hero-cta { flex-direction: column; align-items: center; gap: 12px; }
    .btn-hero { width: 100%; max-width: 260px; }
    .phone-frame { width: 200px; }
    .viral-body h3 { font-size: .9375rem; }
    .list-item { padding: 14px 12px; gap: 12px; }
    .list-info p { font-size: .75rem; white-space: normal; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
    .trust-bar { padding: 20px 16px; }
    .cta-badges { gap: 12px; }
    .cta-badge { padding: 6px 14px; font-size: .8125rem; }
    .faq-wrap .accordion-button { font-size: .9375rem; padding: 16px 16px; }
    .faq-wrap .accordion-body { padding: 0 16px 14px; font-size: .875rem; }
}

/* roulang page: article */
:root {
    --bg: #F7FAFC;
    --surface: #FFFFFF;
    --primary: #3B82F6;
    --primary-light: #EFF6FF;
    --primary-dark: #1D4ED8;
    --secondary: #F59E0B;
    --text-main: #1E293B;
    --text-sub: #64748B;
    --border: #E2E8F0;
    --radius: 16px;
    --radius-sm: 8px;
    --shadow-card: 0 4px 20px rgba(30, 41, 59, 0.06);
    --shadow-card-hover: 0 10px 30px rgba(30, 41, 59, 0.12);
    --font-base: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    --header-h: 64px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font-base);
    background: var(--bg);
    color: var(--text-main);
    line-height: 1.75;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: color .2s ease; }
button { font-family: inherit; border: none; background: none; cursor: pointer; }
ul, ol { list-style: none; }
.container { max-width: 1200px; }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    border-radius: var(--radius-sm);
    padding: 10px 20px;
    font-weight: 600;
    font-size: 0.95rem;
    line-height: 1.4;
    border: 1px solid transparent;
    transition: all .25s ease;
}
.btn:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.3);
}
.btn-primary {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}
.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(59, 130, 246, 0.25);
}
.btn-outline-primary {
    background: #fff;
    border-color: var(--primary);
    color: var(--primary);
}
.btn-outline-primary:hover {
    background: var(--primary-light);
    color: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-2px);
}
.btn-cta {
    background: var(--secondary);
    border-color: var(--secondary);
    color: #fff;
}
.btn-cta:hover {
    background: #D97706;
    border-color: #D97706;
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(245, 158, 11, 0.25);
}
.btn-sm { padding: 8px 14px; font-size: 0.875rem; }

.badge {
    display: inline-block;
    background: var(--primary-light);
    color: var(--primary-dark);
    font-size: 0.8rem;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 999px;
    line-height: 1.4;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 1030;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    height: var(--header-h);
}
.nav-wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-h);
    gap: 16px;
}
.brand {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-dark);
    letter-spacing: 0.5px;
    white-space: nowrap;
}
.brand i { color: var(--primary); font-size: 1.35rem; }
.nav-menu {
    display: flex;
    align-items: center;
    gap: 4px;
    margin: 0;
    padding: 0;
}
.nav-menu li { position: relative; }
.nav-menu .nav-link {
    display: inline-flex;
    align-items: center;
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-main);
    transition: all .2s ease;
}
.nav-menu .nav-link:hover {
    color: var(--primary);
    background: var(--primary-light);
}
.nav-menu .nav-link.active {
    color: var(--primary);
    font-weight: 700;
    background: var(--primary-light);
}
.nav-menu .nav-link.active::after {
    content: '';
    position: absolute;
    left: 14px;
    right: 14px;
    bottom: 2px;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
}
.nav-menu .nav-cta { margin-left: 8px; }
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background: var(--primary-light);
    align-items: center;
    transition: background .2s ease;
}
.nav-toggle span {
    display: block;
    width: 18px;
    height: 2px;
    background: var(--primary-dark);
    border-radius: 2px;
    transition: all .3s ease;
}
.nav-toggle:hover { background: #DBEAFE; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.breadcrumb-wrap {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 14px 0;
}
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0;
    font-size: 0.875rem;
    color: var(--text-sub);
    flex-wrap: wrap;
}
.breadcrumb a { color: var(--primary); }
.breadcrumb a:hover { color: var(--primary-dark); }
.breadcrumb .sep { color: #CBD5E1; }
.breadcrumb .current {
    color: var(--text-sub);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 320px;
}

.page-main { padding: 56px 0 72px; }
.article-header {
    max-width: 720px;
    margin: 0 auto 36px;
    text-align: center;
}
.article-cat-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--primary-light);
    color: var(--primary-dark);
    font-size: 0.85rem;
    font-weight: 600;
    padding: 6px 16px;
    border-radius: 999px;
    margin-bottom: 16px;
}
.article-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1.3;
    color: var(--text-main);
    margin-bottom: 18px;
}
.article-meta {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 24px;
    color: var(--text-sub);
    font-size: 0.875rem;
    flex-wrap: wrap;
}
.meta-item { display: inline-flex; align-items: center; gap: 6px; }
.read-count {
    color: var(--primary);
    font-weight: 600;
}
.article-body-wrap {
    max-width: 720px;
    margin: 0 auto;
    background: var(--surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow-card);
    padding: 48px 56px;
}
.article-body {
    font-size: 1rem;
    line-height: 1.85;
    color: var(--text-main);
}
.article-body h2 {
    font-size: 1.6rem;
    font-weight: 700;
    margin: 36px 0 16px;
    line-height: 1.4;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
}
.article-body h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin: 28px 0 14px;
    line-height: 1.4;
}
.article-body p { margin: 0 0 18px; }
.article-body ul,
.article-body ol {
    margin: 0 0 18px 20px;
    padding: 0;
}
.article-body ul { list-style: disc; }
.article-body ol { list-style: decimal; }
.article-body li { margin-bottom: 6px; }
.article-body img {
    border-radius: calc(var(--radius) - 4px);
    margin: 24px 0;
    box-shadow: var(--shadow-card);
}
.article-body a { color: var(--primary); font-weight: 500; }
.article-body a:hover { color: var(--primary-dark); text-decoration: underline; }
.article-body blockquote {
    border-left: 4px solid var(--primary);
    background: var(--primary-light);
    padding: 16px 20px;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    margin: 24px 0;
    color: var(--text-sub);
}
.article-body table { width: 100%; border-collapse: collapse; margin: 24px 0; }
.article-body table th,
.article-body table td {
    border: 1px solid var(--border);
    padding: 10px 14px;
    font-size: 0.95rem;
}
.article-body table th { background: var(--bg); font-weight: 600; }

.article-share {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 40px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}
.share-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: #fff;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-main);
    transition: all .2s ease;
}
.share-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-light);
}
.share-btn.like:hover {
    border-color: var(--secondary);
    color: var(--secondary);
    background: #FFF7ED;
}

.article-empty {
    text-align: center;
    padding: 64px 24px;
}
.empty-icon {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: var(--primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 2rem;
    color: var(--primary);
}
.article-empty h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 10px;
}
.article-empty p {
    color: var(--text-sub);
    margin-bottom: 24px;
}

.related-section {
    background: var(--bg);
    padding: 72px 0 72px;
}
.section-head {
    text-align: center;
    margin-bottom: 44px;
}
.section-head h2 {
    font-size: 2.25rem;
    font-weight: 700;
    line-height: 1.25;
    color: var(--text-main);
}
.section-head p {
    color: var(--text-sub);
    margin-top: 10px;
    font-size: 1rem;
}
.related-card {
    display: block;
    height: 100%;
    background: var(--surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow-card);
    overflow: hidden;
    transition: transform .3s ease, box-shadow .3s ease;
}
.related-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-card-hover);
}
.related-card .thumb {
    aspect-ratio: 16 / 10;
    overflow: hidden;
    position: relative;
    background: var(--primary-light);
}
.related-card .thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .4s ease;
}
.related-card:hover .thumb img { transform: scale(1.04); }
.related-card .content { padding: 22px 20px 20px; }
.related-card .badge { margin-bottom: 10px; }
.related-card h3 {
    font-size: 1.15rem;
    font-weight: 600;
    line-height: 1.45;
    color: var(--text-main);
    margin: 8px 0 10px;
    transition: color .2s ease;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.related-card:hover h3 { color: var(--primary); }
.related-excerpt {
    font-size: 0.9rem;
    color: var(--text-sub);
    line-height: 1.65;
    margin-bottom: 14px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.related-meta {
    font-size: 0.8rem;
    color: #94A3B8;
    display: flex;
    align-items: center;
    gap: 6px;
}

.back-list {
    background: var(--bg);
    padding: 0 0 72px;
    text-align: center;
}
.back-list a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary);
    font-size: 0.95rem;
    font-weight: 600;
    padding: 10px 24px;
    border-radius: var(--radius-sm);
    background: var(--surface);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-card);
    transition: all .2s ease;
}
.back-list a:hover {
    background: var(--primary-light);
    color: var(--primary-dark);
    transform: translateY(-2px);
}

.site-footer {
    background: #0F172A;
    color: #94A3B8;
}
.footer-top {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 44px;
    padding: 56px 0 40px;
}
.footer-brand {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #fff;
    font-size: 1.25rem;
    font-weight: 700;
}
.footer-brand i { color: var(--primary); }
.footer-desc {
    margin-top: 14px;
    font-size: 0.9rem;
    line-height: 1.7;
    color: #94A3B8;
}
.footer-col h5 {
    color: #fff;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 16px;
}
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a {
    color: #94A3B8;
    font-size: 0.9rem;
    transition: color .2s ease;
}
.footer-col ul a:hover {
    color: #fff;
    text-decoration: underline;
}
.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 18px 0;
    text-align: center;
    font-size: 0.8rem;
    color: #64748B;
}

@media (max-width: 991px) {
    .nav-toggle { display: flex; }
    .nav-menu {
        position: fixed;
        top: var(--header-h);
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        align-items: stretch;
        gap: 4px;
        padding: 20px;
        box-shadow: 0 20px 40px rgba(30, 41, 59, 0.12);
        transform: translateY(-120%);
        transition: transform .3s ease;
        visibility: hidden;
        opacity: 0;
    }
    .nav-menu.open {
        transform: translateY(0);
        visibility: visible;
        opacity: 1;
    }
    .nav-menu .nav-link {
        display: flex;
        align-items: center;
        font-size: 1.05rem;
        line-height: 48px;
        padding: 0 14px;
        border-radius: var(--radius-sm);
    }
    .nav-menu .nav-link.active::after { display: none; }
    .nav-menu .nav-cta { margin-left: 0; margin-top: 12px; }
    .nav-menu .nav-cta .btn { width: 100%; justify-content: center; }
}

@media (max-width: 768px) {
    .footer-top {
        grid-template-columns: 1fr 1fr;
        gap: 28px;
        padding: 44px 0 32px;
    }
    .article-body-wrap { padding: 32px 24px; }
    .article-header h1 { font-size: 2rem; }
    .section-head h2 { font-size: 1.75rem; }
}

@media (max-width: 520px) {
    .container { padding-left: 20px; padding-right: 20px; }
    body { font-size: 15px; }
    .brand { font-size: 1.1rem; }
    .page-main { padding: 36px 0 56px; }
    .article-header h1 { font-size: 1.65rem; }
    .article-meta { gap: 14px; font-size: 0.8rem; }
    .article-body-wrap { padding: 24px 18px; border-radius: 12px; }
    .article-body { font-size: 0.95rem; }
    .article-body h2 { font-size: 1.35rem; }
    .article-body h3 { font-size: 1.15rem; }
    .related-section { padding: 48px 0 48px; }
    .section-head h2 { font-size: 1.5rem; }
    .back-list { padding-bottom: 48px; }
    .share-btn { padding: 8px 14px; font-size: 0.8rem; }
    .footer-top { grid-template-columns: 1fr; gap: 24px; }
    .breadcrumb .current { max-width: 200px; }
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --bg: #F7FAFC;
            --surface: #FFFFFF;
            --primary: #3B82F6;
            --primary-light: #EFF6FF;
            --primary-dark: #1D4ED8;
            --secondary: #F59E0B;
            --text-main: #1E293B;
            --text-sub: #64748B;
            --border: #E2E8F0;
            --shadow-card: 0 4px 20px rgba(30, 41, 59, 0.06);
            --shadow-card-hover: 0 10px 30px rgba(30, 41, 59, 0.12);
            --radius-lg: 16px;
            --radius-md: 8px;
            --section-space: 80px;
            --section-space-mobile: 48px;
            --header-h: 64px;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            color: var(--text-main);
            background: var(--bg);
            line-height: 1.75;
            font-size: 1rem;
            margin: 0;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color .2s ease;
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
        }
        button {
            font-family: inherit;
            cursor: pointer;
        }
        ul,
        ol {
            margin: 0;
            padding: 0;
        }
        .container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* ===== 按钮系统 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            border-radius: var(--radius-md);
            transition: all .25s ease;
            padding: 8px 20px;
            font-size: .95rem;
            border: 1px solid transparent;
        }
        .btn:focus,
        .btn-cta:focus {
            outline: none;
            box-shadow: 0 0 0 3px rgba(59, 130, 246, .3);
        }
        .btn-primary {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(59, 130, 246, .25);
        }
        .btn-outline {
            background: transparent;
            border-color: var(--primary);
            color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary-light);
            color: var(--primary-dark);
            transform: translateY(-2px);
        }
        .btn-cta {
            background: var(--secondary);
            border-color: var(--secondary);
            color: #fff;
            padding: 14px 36px;
            font-size: 1.05rem;
        }
        .btn-cta:hover {
            background: #d97706;
            border-color: #d97706;
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(245, 158, 11, .3);
        }
        .btn-lg {
            padding: 12px 28px;
            font-size: 1rem;
        }
        .btn-sm {
            padding: 6px 14px;
            font-size: .875rem;
        }

        /* ===== 导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
        }
        .navbar {
            min-height: var(--header-h);
            padding: 0;
        }
        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            min-height: var(--header-h);
        }
        .brand {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-main);
            white-space: nowrap;
        }
        .brand i {
            color: var(--primary);
            font-size: 1.35rem;
        }
        .brand:hover {
            color: var(--text-main);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            border: 0;
            padding: 8px 6px;
            border-radius: 6px;
            transition: background .2s;
        }
        .nav-toggle:hover {
            background: var(--primary-light);
        }
        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text-main);
            border-radius: 2px;
            transition: transform .3s, opacity .3s;
        }
        .nav-toggle[aria-expanded="true"] span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-toggle[aria-expanded="true"] span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle[aria-expanded="true"] span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-menu li {
            position: relative;
        }
        .nav-link {
            display: inline-block;
            padding: 8px 14px;
            border-radius: 8px;
            font-size: .925rem;
            font-weight: 500;
            color: var(--text-main);
            transition: background .2s, color .2s;
        }
        .nav-link:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-link.active::after {
            content: "";
            display: block;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            margin-top: 2px;
        }
        .nav-cta {
            margin-left: 8px;
        }

        /* ===== 面包屑 ===== */
        .breadcrumb-nav {
            margin-bottom: 32px;
        }
        .breadcrumb {
            background: transparent;
            padding: 0;
            margin: 0;
            font-size: .875rem;
            justify-content: flex-start;
        }
        .breadcrumb a {
            color: var(--text-sub);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .active {
            color: var(--text-main);
            font-weight: 500;
        }
        .breadcrumb-item+.breadcrumb-item::before {
            color: var(--border);
        }

        /* ===== Hero ===== */
        .page-hero {
            position: relative;
            padding: 64px 0 72px;
            background: linear-gradient(135deg, #EFF6FF 0%, #F7FAFC 60%, #FFFFFF 100%);
            overflow: hidden;
        }
        .page-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: .06;
            pointer-events: none;
        }
        .page-hero::after {
            content: "";
            position: absolute;
            width: 420px;
            height: 420px;
            border-radius: 50%;
            background: rgba(59, 130, 246, .08);
            top: -120px;
            right: -100px;
            pointer-events: none;
        }
        .page-hero .container {
            position: relative;
            z-index: 1;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-light);
            color: var(--primary-dark);
            font-size: .813rem;
            font-weight: 600;
            padding: 5px 14px;
            border-radius: 999px;
            margin-bottom: 18px;
        }
        .page-hero h1 {
            font-size: clamp(2rem, 4.5vw, 3.2rem);
            font-weight: 700;
            line-height: 1.2;
            margin-bottom: 16px;
            color: var(--text-main);
        }
        .hero-text {
            font-size: 1.05rem;
            color: var(--text-sub);
            max-width: 560px;
            margin-bottom: 24px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 32px;
        }
        .hero-stats {
            display: flex;
            gap: 32px;
            flex-wrap: wrap;
        }
        .hero-stats div {
            display: flex;
            flex-direction: column;
        }
        .hero-stats strong {
            font-size: 1.375rem;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
        }
        .hero-stats span {
            font-size: .813rem;
            color: var(--text-sub);
        }
        .hero-card {
            border-radius: 20px;
            overflow: hidden;
            box-shadow: var(--shadow-card-hover);
            border: 6px solid #fff;
            background: var(--surface);
            transform: rotate(1.5deg);
            transition: transform .3s;
        }
        .hero-card:hover {
            transform: rotate(0deg) scale(1.01);
        }
        .hero-card img {
            width: 100%;
            aspect-ratio: 4/3;
            object-fit: cover;
            display: block;
        }

        /* ===== 通用板块 ===== */
        .section-padding {
            padding: var(--section-space) 0;
        }
        .section-head {
            margin-bottom: 44px;
        }
        .section-head h2 {
            font-size: 2rem;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 12px;
            color: var(--text-main);
        }
        .section-head p {
            font-size: .938rem;
            color: var(--text-sub);
            max-width: 560px;
            margin: 0 auto;
        }
        .section-tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary-dark);
            font-size: .813rem;
            font-weight: 600;
            border-radius: 999px;
            padding: 4px 14px;
            margin-bottom: 10px;
        }
        .text-center {
            text-align: center;
        }

        /* ===== Intro ===== */
        .intro-section {
            background: var(--surface);
            border-bottom: 1px solid var(--border);
        }
        .intro-img-wrap {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }
        .intro-img-wrap img {
            width: 100%;
            aspect-ratio: 4/3;
            object-fit: cover;
            display: block;
        }
        .intro-section h2 {
            font-size: 1.75rem;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 16px;
        }
        .intro-section p {
            font-size: .938rem;
            color: var(--text-sub);
            margin-bottom: 16px;
        }
        .feature-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: .9rem;
            color: var(--text-main);
            margin-bottom: 12px;
        }
        .feature-list i {
            color: var(--primary);
            font-size: 1rem;
            margin-top: 3px;
            flex-shrink: 0;
        }

        /* ===== Guide Cards ===== */
        .guide-cards {
            background: var(--bg);
        }
        .guide-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            height: 100%;
            box-shadow: var(--shadow-card);
            transition: all .3s ease;
            position: relative;
            border: 1px solid transparent;
        }
        .guide-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
            border-color: var(--border);
        }
        .card-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            color: var(--primary);
            margin-bottom: 18px;
            transition: background .3s, color .3s;
        }
        .guide-card:hover .card-icon {
            background: var(--primary);
            color: #fff;
        }
        .guide-card h3 {
            font-size: 1.125rem;
            font-weight: 600;
            margin-bottom: 10px;
            color: var(--text-main);
        }
        .guide-card p {
            font-size: .9rem;
            color: var(--text-sub);
            margin-bottom: 18px;
            line-height: 1.65;
        }
        .card-tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary-dark);
            font-size: .781rem;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 999px;
        }

        /* ===== Steps ===== */
        .steps-section {
            background: var(--surface);
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .step-item {
            background: var(--bg);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            text-align: center;
            border: 1px solid var(--border);
            transition: all .3s;
            position: relative;
        }
        .step-item:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-card);
            transform: translateY(-4px);
        }
        .step-num {
            font-size: 2.25rem;
            font-weight: 800;
            color: var(--primary);
            opacity: .35;
            line-height: 1;
            display: block;
            margin-bottom: 14px;
            letter-spacing: 1px;
        }
        .step-item h3 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-main);
        }
        .step-item p {
            font-size: .875rem;
            color: var(--text-sub);
            margin-bottom: 0;
            line-height: 1.6;
        }

        /* ===== Scenario ===== */
        .scenario-section {
            background: var(--bg);
        }
        .scenario-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 26px 22px;
            height: 100%;
            box-shadow: var(--shadow-card);
            transition: all .3s;
            border: 1px solid transparent;
        }
        .scenario-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
            border-color: var(--border);
        }
        .scenario-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.125rem;
            margin-bottom: 16px;
            transition: background .3s, color .3s;
        }
        .scenario-card:hover .scenario-icon {
            background: var(--primary);
            color: #fff;
        }
        .scenario-card h3 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-main);
        }
        .scenario-card p {
            font-size: .875rem;
            color: var(--text-sub);
            margin-bottom: 0;
            line-height: 1.65;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--surface);
        }
        .faq-wrap {
            max-width: 820px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--surface);
            border-radius: 14px;
            box-shadow: var(--shadow-card);
            margin-bottom: 16px;
            overflow: hidden;
            border: 1px solid var(--border);
            transition: box-shadow .3s, border-color .3s;
        }
        .faq-item.open {
            border-color: var(--primary);
            box-shadow: 0 6px 24px rgba(59, 130, 246, .1);
        }
        .faq-toggle {
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            padding: 18px 20px;
            border: none;
            background: transparent;
            font-size: .95rem;
            font-weight: 600;
            color: var(--text-main);
            text-align: left;
            transition: background .2s;
        }
        .faq-toggle:hover {
            background: var(--primary-light);
        }
        .faq-toggle i {
            flex-shrink: 0;
            transition: transform .3s;
            color: var(--primary);
            font-size: .875rem;
        }
        .faq-item.open .faq-toggle i {
            transform: rotate(180deg);
        }
        .faq-content {
            max-height: 0;
            overflow: hidden;
            padding: 0 20px;
            transition: max-height .35s ease, padding .3s ease;
        }
        .faq-item.open .faq-content {
            max-height: 320px;
            padding: 0 20px 18px;
        }
        .faq-content p {
            margin: 0;
            font-size: .9rem;
            color: var(--text-sub);
            line-height: 1.7;
            border-top: 1px dashed var(--border);
            padding-top: 12px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-light) 0%, #F7FAFC 100%);
            padding: 88px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: "";
            position: absolute;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(59, 130, 246, .07);
            bottom: -120px;
            left: -80px;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: .95rem;
            color: var(--text-sub);
            margin-bottom: 28px;
        }
        .cta-badges {
            display: flex;
            justify-content: center;
            gap: 28px;
            margin-top: 28px;
            flex-wrap: wrap;
        }
        .cta-badges span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: .875rem;
            color: var(--text-sub);
        }
        .cta-badges i {
            color: var(--primary);
            font-size: .938rem;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0F172A;
            color: #94A3B8;
            padding: 56px 0 0;
        }
        .footer-top {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 32px;
            padding-bottom: 40px;
        }
        .footer-brand {
            font-size: 1.15rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .footer-brand i {
            color: var(--primary);
        }
        .footer-desc {
            font-size: .875rem;
            line-height: 1.75;
            color: #94A3B8;
            max-width: 320px;
            margin-bottom: 0;
        }
        .footer-col h5 {
            color: #fff;
            font-size: .938rem;
            font-weight: 600;
            margin-bottom: 14px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col li {
            margin-bottom: 8px;
        }
        .footer-col a {
            color: #94A3B8;
            font-size: .875rem;
            transition: color .2s;
        }
        .footer-col a:hover {
            color: #fff;
            text-decoration: underline;
        }
        .footer-col li:last-child {
            font-size: .875rem;
            color: #94A3B8;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .08);
            padding: 18px 0;
            font-size: .813rem;
            text-align: center;
            color: #64748B;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 991.98px) {
            .nav-toggle {
                display: flex;
            }
            .nav-menu {
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                padding: 16px 20px 24px;
                display: none;
                box-shadow: 0 20px 40px rgba(30, 41, 59, .1);
                border-bottom: 1px solid var(--border);
                max-height: calc(100vh - var(--header-h));
                overflow-y: auto;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-link {
                padding: 12px 10px;
                font-size: 1rem;
                border-radius: 8px;
                width: 100%;
            }
            .nav-link.active::after {
                display: none;
            }
            .nav-link.active {
                background: var(--primary-light);
            }
            .nav-cta {
                margin-left: 0;
                margin-top: 10px;
                padding-top: 12px;
                border-top: 1px solid var(--border);
            }
            .nav-cta .btn {
                width: 100%;
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .footer-top {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
        }

        @media (max-width: 767.98px) {
            .section-padding {
                padding: var(--section-space-mobile) 0;
            }
            .page-hero {
                padding: 40px 0 48px;
            }
            .hero-actions {
                gap: 10px;
            }
            .hero-stats {
                gap: 20px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .faq-toggle {
                font-size: .9rem;
                padding: 16px 16px;
            }
            .faq-content {
                padding: 0 16px;
            }
            .faq-item.open .faq-content {
                padding: 0 16px 16px;
            }
            .cta-section {
                padding: 56px 0;
            }
            .cta-badges {
                gap: 16px;
            }
            .footer-top {
                grid-template-columns: 1fr;
                gap: 24px;
                padding-bottom: 24px;
            }
        }

        @media (max-width: 575.98px) {
            .brand {
                font-size: 1.125rem;
            }
            .page-hero h1 {
                font-size: 1.75rem;
            }
            .hero-text {
                font-size: .95rem;
            }
            .section-head h2 {
                font-size: 1.5rem;
            }
            .guide-card {
                padding: 22px 18px;
            }
            .step-item {
                padding: 24px 18px;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
        }

/* roulang page: category3 */
:root {
            --bg: #F7FAFC;
            --surface: #FFFFFF;
            --primary: #3B82F6;
            --primary-light: #EFF6FF;
            --primary-dark: #1D4ED8;
            --secondary: #F59E0B;
            --text-main: #1E293B;
            --text-sub: #64748B;
            --border: #E2E8F0;
            --shadow-card: 0 4px 20px rgba(30, 41, 59, 0.06);
            --shadow-card-hover: 0 10px 30px rgba(30, 41, 59, 0.12);
            --radius-card: 16px;
            --radius-btn: 8px;
            --radius-tag: 999px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            margin: 0;
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            font-size: 1rem;
            line-height: 1.75;
            background-color: var(--bg);
            color: var(--text-main);
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color .2s ease;
        }
        a:hover {
            color: var(--primary-dark);
        }
        .container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border);
        }
        .navbar {
            padding: 0;
            min-height: 64px;
        }
        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: nowrap;
            position: relative;
        }
        .brand {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-main);
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
            letter-spacing: .2px;
        }
        .brand i {
            color: var(--primary);
            font-size: 1.3rem;
        }
        .brand:hover {
            color: var(--primary-dark);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: 0;
            padding: 6px;
            cursor: pointer;
            border-radius: 6px;
        }
        .nav-toggle span {
            width: 22px;
            height: 2px;
            background: var(--text-main);
            display: block;
            border-radius: 2px;
            transition: transform .25s ease, opacity .25s ease;
        }
        .nav-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-menu>li {
            margin: 0;
        }
        .nav-link {
            display: block;
            padding: 8px 14px;
            font-size: 0.95rem;
            color: var(--text-main);
            border-radius: 8px;
            position: relative;
            font-weight: 500;
            transition: background .2s ease, color .2s ease;
        }
        .nav-link:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 2px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .nav-cta {
            margin-left: 8px;
        }
        .btn {
            border-radius: var(--radius-btn);
            font-weight: 500;
            transition: all .25s ease;
            font-size: .95rem;
            padding: 8px 18px;
        }
        .btn-primary {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 8px 20px rgba(29, 78, 216, 0.25);
            color: #fff;
        }
        .btn-primary:focus {
            outline: none;
            box-shadow: 0 0 0 3px rgba(59, 130, 246, .3);
        }
        .btn-outline-primary {
            background: transparent;
            border: 1px solid var(--primary);
            color: var(--primary);
        }
        .btn-outline-primary:hover {
            background: var(--primary-light);
            color: var(--primary-dark);
            border-color: var(--primary-dark);
            transform: translateY(-1px);
        }
        .btn-outline-primary:focus {
            outline: none;
            box-shadow: 0 0 0 3px rgba(59, 130, 246, .3);
        }
        .btn-sm {
            padding: 6px 14px;
            font-size: 0.875rem;
        }
        .btn-cta {
            background: var(--secondary);
            border-color: var(--secondary);
            color: #fff;
            font-size: 1.1rem;
            padding: 14px 40px;
            border-radius: 10px;
            font-weight: 600;
            box-shadow: 0 6px 20px rgba(245, 158, 11, 0.3);
        }
        .btn-cta:hover {
            background: #d97706;
            border-color: #d97706;
            transform: translateY(-2px);
            color: #fff;
            box-shadow: 0 10px 28px rgba(217, 119, 6, 0.35);
        }
        .btn-cta:focus {
            outline: none;
            box-shadow: 0 0 0 3px rgba(245, 158, 11, .35);
        }
        .page-banner {
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            padding: 96px 0 84px;
            position: relative;
            z-index: 1;
        }
        .page-banner::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(110deg, rgba(15, 23, 42, 0.72) 20%, rgba(30, 41, 59, 0.35) 70%, rgba(30, 41, 59, 0.12));
            z-index: -1;
        }
        .breadcrumb-bar {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, 0.14);
            border-radius: 999px;
            padding: 6px 16px;
            font-size: .85rem;
            color: rgba(255, 255, 255, 0.92);
            margin-bottom: 24px;
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255, 255, 255, 0.16);
        }
        .breadcrumb-bar a {
            color: rgba(255, 255, 255, 0.85);
        }
        .breadcrumb-bar a:hover {
            color: #fff;
        }
        .page-banner h1 {
            font-size: clamp(1.8rem, 4vw, 3rem);
            font-weight: 700;
            color: #fff;
            line-height: 1.25;
            margin-bottom: 16px;
        }
        .page-banner p {
            color: rgba(255, 255, 255, 0.92);
            max-width: 640px;
            font-size: 1.02rem;
            line-height: 1.8;
            margin-bottom: 0;
        }
        .section-guide {
            padding: 72px 0 40px;
        }
        .guide-wrap {
            background: var(--surface);
            border-radius: 20px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-card);
            padding: 40px 44px;
            display: flex;
            gap: 32px;
            align-items: flex-start;
            position: relative;
            overflow: hidden;
        }
        .guide-wrap::after {
            content: "\f0a1";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            position: absolute;
            right: 24px;
            bottom: -6px;
            font-size: 120px;
            color: rgba(59, 130, 246, 0.06);
            pointer-events: none;
        }
        .guide-wrap .tag {
            flex-shrink: 0;
            background: var(--primary-light);
            color: var(--primary-dark);
            border-radius: 999px;
            font-size: 0.84rem;
            font-weight: 600;
            padding: 6px 16px;
            white-space: nowrap;
        }
        .guide-wrap p {
            margin: 0;
            color: var(--text-sub);
            line-height: 1.85;
        }
        .section-cards {
            padding: 48px 0 24px;
        }
        .section-head {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 52px;
        }
        .section-head .tag-line {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary-dark);
            font-size: .82rem;
            font-weight: 600;
            padding: 5px 16px;
            border-radius: 999px;
            margin-bottom: 16px;
        }
        .section-head h2 {
            font-size: clamp(1.6rem, 3vw, 2.25rem);
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.3;
            margin-bottom: 14px;
        }
        .section-head p {
            color: var(--text-sub);
            font-size: .98rem;
            line-height: 1.8;
            margin: 0;
        }
        .content-card {
            background: var(--surface);
            border-radius: var(--radius-card);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            height: 100%;
            transition: transform .3s ease, box-shadow .3s ease;
            display: flex;
            flex-direction: column;
        }
        .content-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }
        .card-img {
            position: relative;
            aspect-ratio: 4 / 3;
            overflow: hidden;
            background: var(--primary-light);
        }
        .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s ease;
        }
        .content-card:hover .card-img img {
            transform: scale(1.04);
        }
        .badge-soft {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(255, 255, 255, 0.92);
            color: var(--primary-dark);
            font-size: .78rem;
            font-weight: 600;
            border-radius: 999px;
            padding: 4px 12px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .badge-soft i {
            font-size: .7rem;
        }
        .card-body {
            padding: 24px 20px 20px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .card-body h3 {
            font-size: 1.2rem;
            font-weight: 600;
            margin-bottom: 10px;
            color: var(--text-main);
            transition: color .2s;
        }
        .content-card:hover .card-body h3 {
            color: var(--primary);
        }
        .card-body p {
            color: var(--text-sub);
            font-size: .92rem;
            line-height: 1.75;
            margin-bottom: 18px;
            flex: 1;
        }
        .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
        }
        .card-meta span {
            font-size: .82rem;
            color: var(--text-sub);
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }
        .section-scene {
            padding: 72px 0;
        }
        .scene-card {
            background: var(--surface);
            border-radius: var(--radius-card);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-card);
            padding: 36px 28px;
            height: 100%;
            transition: transform .3s, box-shadow .3s;
        }
        .scene-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }
        .scene-icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin-bottom: 20px;
        }
        .scene-card h3 {
            font-size: 1.15rem;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .scene-card p {
            color: var(--text-sub);
            font-size: .92rem;
            line-height: 1.8;
            margin-bottom: 0;
        }
        .section-steps {
            padding: 72px 0;
            background: var(--surface);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .step-card {
            text-align: center;
            padding: 36px 24px;
            background: var(--bg);
            border-radius: var(--radius-card);
            border: 1px solid var(--border);
            height: 100%;
            position: relative;
            transition: transform .3s, box-shadow .3s;
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            background: var(--surface);
        }
        .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 1.15rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            box-shadow: 0 4px 14px rgba(59, 130, 246, 0.3);
        }
        .step-card h3 {
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .step-card p {
            color: var(--text-sub);
            font-size: .9rem;
            line-height: 1.75;
            margin-bottom: 0;
        }
        .section-faq {
            padding: 72px 0;
        }
        .faq-wrap {
            max-width: 820px;
            margin: 0 auto;
        }
        .custom-accordion {
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            overflow: hidden;
            background: var(--surface);
            box-shadow: var(--shadow-card);
            margin-bottom: 12px;
        }
        .custom-accordion:last-child {
            margin-bottom: 0;
        }
        .accordion-header {
            margin: 0;
        }
        .accordion-header .accordion-button {
            width: 100%;
            background: var(--surface);
            border: 0;
            padding: 20px 24px;
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-main);
            text-align: left;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            transition: background .2s;
            font-family: inherit;
        }
        .accordion-header .accordion-button:hover {
            background: var(--primary-light);
        }
        .accordion-header .accordion-button:focus {
            outline: none;
            box-shadow: inset 0 0 0 3px rgba(59, 130, 246, 0.2);
        }
        .accordion-header .accordion-button::after {
            content: "\f078";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            font-size: .8rem;
            color: var(--primary);
            flex-shrink: 0;
            margin-left: 16px;
            transition: transform .3s;
        }
        .accordion-header .accordion-button:not(.collapsed)::after {
            transform: rotate(180deg);
        }
        .accordion-body {
            padding: 20px 24px 24px;
            border-top: 1px solid var(--border);
            background: #FAFCFE;
            color: var(--text-sub);
            font-size: .95rem;
            line-height: 1.85;
        }
        .section-cta {
            padding: 72px 0;
            background: var(--primary-light);
            border-radius: 0;
        }
        .cta-banner {
            background: linear-gradient(135deg, #EFF6FF 0%, #FFFFFF 100%);
            border-radius: 24px;
            border: 1px solid rgba(59, 130, 246, 0.16);
            padding: 64px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-banner::before {
            content: "";
            position: absolute;
            width: 240px;
            height: 240px;
            border-radius: 50%;
            background: rgba(59, 130, 246, 0.08);
            top: -80px;
            right: -60px;
        }
        .cta-banner::after {
            content: "";
            position: absolute;
            width: 180px;
            height: 180px;
            border-radius: 50%;
            background: rgba(245, 158, 11, 0.08);
            bottom: -70px;
            left: -40px;
        }
        .cta-banner h2 {
            font-size: clamp(1.6rem, 3.5vw, 2.4rem);
            font-weight: 700;
            margin-bottom: 14px;
            position: relative;
            z-index: 1;
        }
        .cta-banner p {
            color: var(--text-sub);
            font-size: 1.02rem;
            max-width: 560px;
            margin: 0 auto 32px;
            position: relative;
            z-index: 1;
        }
        .cta-banner .btn-cta {
            position: relative;
            z-index: 1;
        }
        .cta-trust {
            display: flex;
            justify-content: center;
            gap: 36px;
            margin-top: 36px;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }
        .cta-trust .trust-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: .88rem;
            color: var(--text-sub);
        }
        .cta-trust .trust-item i {
            color: var(--primary);
        }
        .site-footer {
            background: #0F172A;
            color: #94A3B8;
            padding-top: 64px;
            font-size: .9rem;
        }
        .footer-top {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 14px;
        }
        .footer-brand i {
            color: var(--primary);
        }
        .footer-desc {
            color: #94A3B8;
            line-height: 1.8;
            font-size: .88rem;
            margin-bottom: 0;
            max-width: 360px;
        }
        .footer-col h5 {
            color: #F1F5F9;
            font-size: .95rem;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col li {
            margin-bottom: 10px;
        }
        .footer-col a {
            color: #94A3B8;
            font-size: .88rem;
            transition: color .2s;
        }
        .footer-col a:hover {
            color: #fff;
            text-decoration: underline;
        }
        .footer-bottom {
            padding: 20px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            text-align: center;
            color: #64748B;
            font-size: .82rem;
        }
        .footer-bottom .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
        }
        @media (max-width: 991.98px) {
            .navbar {
                min-height: 56px;
            }
            .brand {
                font-size: 1rem;
            }
            .nav-toggle {
                display: flex;
            }
            .nav-menu {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                align-items: stretch;
                padding: 12px 20px 20px;
                box-shadow: 0 16px 40px rgba(15, 23, 42, 0.12);
                border-top: 1px solid var(--border);
                border-radius: 0 0 16px 16px;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu>li {
                padding: 2px 0;
            }
            .nav-link {
                font-size: 1.05rem;
                line-height: 44px;
                padding: 0 12px;
            }
            .nav-link.active::after {
                left: 12px;
                right: auto;
                width: 32px;
                bottom: 6px;
            }
            .nav-cta {
                margin: 12px 0 0;
            }
            .nav-cta .btn {
                display: block;
                text-align: center;
            }
            .footer-top {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .cta-banner {
                padding: 48px 24px;
            }
        }
        @media (max-width: 767.98px) {
            .section-guide,
            .section-scene,
            .section-steps,
            .section-faq,
            .section-cta {
                padding: 48px 0;
            }
            .page-banner {
                padding: 72px 0 64px;
            }
            .guide-wrap {
                flex-direction: column;
                padding: 28px 24px;
                gap: 16px;
            }
            .page-banner h1 {
                font-size: 1.8rem;
            }
            .cta-banner {
                padding: 40px 20px;
            }
            .cta-trust {
                gap: 20px;
            }
            .footer-top {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom .container {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width: 575.98px) {
            .section-cards .row {
                flex-direction: column;
            }
            .card-body {
                padding: 20px 16px 16px;
            }
            .scene-card {
                padding: 28px 20px;
            }
            .step-card {
                padding: 28px 16px;
            }
            .section-head {
                margin-bottom: 36px;
            }
            .accordion-header .accordion-button {
                font-size: .95rem;
                padding: 16px 16px;
            }
            .accordion-body {
                padding: 16px;
            }
        }

/* roulang page: category2 */
:root {
            --bg: #F7FAFC;
            --surface: #FFFFFF;
            --primary: #3B82F6;
            --primary-light: #EFF6FF;
            --primary-dark: #1D4ED8;
            --secondary: #F59E0B;
            --secondary-dark: #D97706;
            --text-main: #1E293B;
            --text-sub: #64748B;
            --border: #E2E8F0;
            --shadow-card: 0 4px 20px rgba(30, 41, 59, 0.06);
            --shadow-card-hover: 0 10px 30px rgba(30, 41, 59, 0.12);
            --radius: 16px;
            --radius-sm: 8px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            background: var(--bg);
            color: var(--text-main);
            line-height: 1.75;
            font-size: 1rem;
            -webkit-font-smoothing: antialiased;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

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

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

        .container {
            max-width: 1200px;
        }

        a:focus-visible,
        .btn:focus-visible,
        .nav-link:focus-visible {
            outline: none;
            box-shadow: 0 0 0 3px rgba(59, 130, 246, .3);
            border-radius: 6px;
        }

        /* ---------- Header / Nav ---------- */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
        }

        .navbar {
            padding: 0;
        }

        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 64px;
        }

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary-dark);
            white-space: nowrap;
        }

        .brand i {
            color: var(--primary);
            font-size: 1.45rem;
        }

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

        .nav-toggle {
            display: none;
            border: none;
            background: none;
            cursor: pointer;
            padding: 8px;
            border-radius: var(--radius-sm);
        }

        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--text-main);
            margin: 5px 0;
            border-radius: 2px;
            transition: transform .3s ease, opacity .3s ease;
        }

        .nav-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-menu .nav-link {
            padding: 8px 14px;
            font-weight: 500;
            color: var(--text-main);
            border-radius: var(--radius-sm);
            position: relative;
            font-size: .9375rem;
            transition: color .2s ease, background .2s ease;
        }

        .nav-menu .nav-link:hover {
            color: var(--primary);
            background: var(--primary-light);
        }

        .nav-menu .nav-link.active {
            color: var(--primary);
            font-weight: 700;
        }

        .nav-menu .nav-link.active::after {
            content: "";
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 2px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .nav-cta .btn {
            margin-left: 8px;
        }

        /* ---------- Buttons ---------- */
        .btn {
            border-radius: var(--radius-sm);
            padding: 8px 20px;
            font-weight: 600;
            border: 1px solid transparent;
            transition: all .25s ease;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            justify-content: center;
        }

        .btn-primary {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(59, 130, 246, .25);
        }

        .btn-outline-primary {
            background: transparent;
            border-color: var(--primary);
            color: var(--primary);
        }

        .btn-outline-primary:hover {
            background: var(--primary-light);
            color: var(--primary-dark);
            transform: translateY(-1px);
        }

        .btn-outline-light {
            background: transparent;
            border-color: rgba(255, 255, 255, .7);
            color: #fff;
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, .15);
            color: #fff;
            border-color: #fff;
        }

        .btn-cta {
            background: var(--secondary);
            border-color: var(--secondary);
            color: #fff;
            padding: 12px 32px;
            font-size: 1.0625rem;
        }

        .btn-cta:hover {
            background: var(--secondary-dark);
            border-color: var(--secondary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(245, 158, 11, .35);
        }

        .btn-sm {
            padding: 6px 16px;
            font-size: .875rem;
        }

        .btn-lg {
            padding: 12px 28px;
            font-size: 1.0625rem;
        }

        /* ---------- Page Hero ---------- */
        .page-hero {
            padding: 84px 0 72px;
            background: linear-gradient(115deg, rgba(29, 78, 216, .93) 0%, rgba(59, 130, 246, .78) 52%, rgba(239, 246, 255, .9) 100%),
                url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            color: #fff;
        }

        .breadcrumb-wrap {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: .875rem;
            color: rgba(255, 255, 255, .85);
            margin-bottom: 24px;
        }

        .breadcrumb-wrap a {
            color: rgba(255, 255, 255, .85);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .breadcrumb-wrap a:hover {
            color: #fff;
            text-decoration: underline;
        }

        .breadcrumb-wrap .sep {
            color: rgba(255, 255, 255, .5);
        }

        .hero-badge {
            display: inline-block;
            padding: 6px 14px;
            border-radius: 999px;
            background: rgba(255, 255, 255, .14);
            border: 1px solid rgba(255, 255, 255, .25);
            font-size: .8125rem;
            letter-spacing: 1px;
            margin-bottom: 16px;
        }

        .page-hero h1 {
            font-size: clamp(2.5rem, 5vw, 4rem);
            font-weight: 700;
            color: #fff;
            line-height: 1.15;
            margin-bottom: 16px;
        }

        .page-hero .hero-lead {
            font-size: 1.125rem;
            color: rgba(255, 255, 255, .9);
            max-width: 640px;
            margin-bottom: 28px;
            line-height: 1.8;
        }

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

        /* ---------- Section Common ---------- */
        .section-head {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 48px;
        }

        .section-tag {
            display: inline-block;
            padding: 5px 14px;
            border-radius: 999px;
            background: var(--primary-light);
            color: var(--primary-dark);
            font-size: .8125rem;
            font-weight: 600;
            letter-spacing: 1px;
            margin-bottom: 12px;
        }

        .section-head h2 {
            font-size: 2.25rem;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.25;
            margin-bottom: 12px;
        }

        .section-head p {
            color: var(--text-sub);
            font-size: 1rem;
        }

        /* ---------- Intro ---------- */
        .intro-section {
            padding: 72px 0;
            background: var(--surface);
        }

        .intro-section h2 {
            font-size: 2rem;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 16px;
            color: var(--text-main);
        }

        .intro-section .intro-text {
            color: var(--text-sub);
            font-size: 1rem;
            line-height: 1.8;
            margin-bottom: 20px;
        }

        .intro-list {
            list-style: none;
            padding: 0;
            margin: 0;
            display: grid;
            gap: 12px;
        }

        .intro-list li {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-main);
            font-weight: 500;
            font-size: .9375rem;
        }

        .intro-list li i {
            color: var(--primary);
            font-size: 1.0625rem;
        }

        .intro-media {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            aspect-ratio: 4 / 3;
        }

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

        .intro-media:hover img {
            transform: scale(1.03);
        }

        /* ---------- Feature Cards ---------- */
        .feature-cards {
            padding: 72px 0;
            background: linear-gradient(180deg, var(--bg) 0%, var(--primary-light) 100%);
        }

        .guide-card {
            background: var(--surface);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            height: 100%;
            transition: transform .25s ease, box-shadow .25s ease;
            border: 1px solid var(--border);
        }

        .guide-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }

        .card-img {
            position: relative;
            aspect-ratio: 4 / 3;
            overflow: hidden;
        }

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

        .guide-card:hover .card-img img {
            transform: scale(1.05);
        }

        .card-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--primary-light);
            color: var(--primary-dark);
            font-size: .8125rem;
            font-weight: 600;
            padding: 5px 12px;
            border-radius: 999px;
            box-shadow: 0 2px 8px rgba(30, 41, 59, .08);
        }

        .guide-card .card-body {
            padding: 24px 20px;
        }

        .guide-card h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin-bottom: 10px;
            color: var(--text-main);
        }

        .guide-card p {
            color: var(--text-sub);
            font-size: .9375rem;
            line-height: 1.75;
            margin-bottom: 16px;
        }

        .card-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-weight: 600;
            font-size: .9375rem;
            color: var(--primary);
            transition: color .2s ease;
        }

        .card-link i {
            transition: transform .2s ease;
        }

        .card-link:hover {
            color: var(--primary-dark);
        }

        .card-link:hover i {
            transform: translateX(4px);
        }

        /* ---------- Steps ---------- */
        .steps-section {
            padding: 72px 0;
            background: var(--surface);
        }

        .step-card {
            background: var(--bg);
            border-radius: var(--radius);
            padding: 24px 20px;
            height: 100%;
            border-left: 4px solid var(--primary);
            box-shadow: var(--shadow-card);
            transition: transform .25s ease, box-shadow .25s ease;
        }

        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }

        .step-num {
            display: inline-flex;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            color: #fff;
            border-radius: 12px;
            font-weight: 700;
            font-size: 1.125rem;
            margin-bottom: 14px;
        }

        .step-card h3 {
            font-size: 1.125rem;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-main);
        }

        .step-card p {
            color: var(--text-sub);
            font-size: .875rem;
            line-height: 1.7;
            margin: 0;
        }

        /* ---------- Scenario ---------- */
        .scenario-section {
            padding: 72px 0;
            background: var(--bg);
        }

        .scenario-card {
            background: var(--surface);
            border-radius: var(--radius);
            padding: 28px 24px;
            height: 100%;
            text-align: center;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            transition: transform .25s ease, box-shadow .25s ease;
        }

        .scenario-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }

        .scenario-icon {
            width: 56px;
            height: 56px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 16px;
            font-size: 1.375rem;
            margin-bottom: 16px;
        }

        .scenario-card h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin-bottom: 10px;
            color: var(--text-main);
        }

        .scenario-card p {
            color: var(--text-sub);
            font-size: .9375rem;
            margin: 0;
            line-height: 1.75;
        }

        /* ---------- Related ---------- */
        .related-section {
            padding: 72px 0;
            background: var(--surface);
        }

        .related-card {
            height: 100%;
            background: var(--surface);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            transition: transform .25s ease, box-shadow .25s ease;
        }

        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }

        .related-card img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
        }

        .related-body {
            padding: 20px;
        }

        .related-body h3 {
            font-size: 1.125rem;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-main);
        }

        .related-body p {
            color: var(--text-sub);
            font-size: .875rem;
            margin-bottom: 16px;
            line-height: 1.7;
        }

        /* ---------- FAQ ---------- */
        .faq-section {
            padding: 72px 0;
            background: var(--primary-light);
        }

        .faq-wrap {
            max-width: 860px;
            margin: 0 auto;
        }

        .faq-accordion .accordion-item {
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            margin-bottom: 14px;
            background: var(--surface);
            overflow: hidden;
            box-shadow: 0 2px 8px rgba(30, 41, 59, .04);
        }

        .faq-accordion .accordion-button {
            background: var(--surface);
            color: var(--text-main);
            font-weight: 600;
            font-size: 1rem;
            padding: 18px 22px;
            box-shadow: none;
            border: none;
            transition: background .2s ease, color .2s ease;
        }

        .faq-accordion .accordion-button:not(.collapsed) {
            background: var(--primary-light);
            color: var(--primary-dark);
        }

        .faq-accordion .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(59, 130, 246, .3);
            border: none;
        }

        .faq-accordion .accordion-button::after {
            background-size: 1.25rem;
            transition: transform .3s ease;
        }

        .faq-accordion .accordion-body {
            padding: 4px 22px 20px;
            color: var(--text-sub);
            line-height: 1.75;
            font-size: .9375rem;
        }

        /* ---------- CTA ---------- */
        .cta-section {
            padding: 72px 0;
            background: linear-gradient(135deg, var(--primary-light) 0%, var(--surface) 100%);
        }

        .cta-inner {
            background: var(--primary);
            border-radius: 24px;
            padding: 56px 32px;
            text-align: center;
            color: #fff;
            box-shadow: 0 12px 40px rgba(29, 78, 216, .25);
            position: relative;
            overflow: hidden;
        }

        .cta-inner::before {
            content: "";
            position: absolute;
            width: 340px;
            height: 340px;
            border-radius: 50%;
            background: rgba(255, 255, 255, .08);
            top: -120px;
            right: -80px;
        }

        .cta-inner::after {
            content: "";
            position: absolute;
            width: 240px;
            height: 240px;
            border-radius: 50%;
            background: rgba(255, 255, 255, .06);
            bottom: -100px;
            left: -60px;
        }

        .cta-inner h2 {
            font-size: 1.75rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: #fff;
            position: relative;
            z-index: 1;
            line-height: 1.3;
        }

        .cta-inner p {
            color: rgba(255, 255, 255, .9);
            margin-bottom: 24px;
            font-size: 1rem;
            position: relative;
            z-index: 1;
        }

        .cta-inner .btn-cta {
            position: relative;
            z-index: 1;
        }

        .cta-badges {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin-top: 24px;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }

        .cta-badges span {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: .875rem;
            color: rgba(255, 255, 255, .95);
        }

        .cta-badges i {
            color: #fff;
        }

        /* ---------- Footer ---------- */
        .site-footer {
            background: #0F172A;
            color: #94A3B8;
            padding-top: 56px;
        }

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

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 1.25rem;
            font-weight: 700;
            color: #F8FAFC;
            margin-bottom: 12px;
        }

        .footer-brand i {
            color: var(--primary);
        }

        .footer-desc {
            font-size: .875rem;
            line-height: 1.75;
            color: #94A3B8;
            margin: 0;
            max-width: 300px;
        }

        .footer-col h5 {
            font-size: 1rem;
            color: #F1F5F9;
            margin-bottom: 16px;
            font-weight: 600;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: grid;
            gap: 10px;
        }

        .footer-col a {
            color: #94A3B8;
            text-decoration: none;
            font-size: .875rem;
            transition: color .2s ease;
        }

        .footer-col a:hover {
            color: #fff;
            text-decoration: underline;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .08);
            padding: 16px 0;
            text-align: center;
            font-size: .8125rem;
            color: #64748B;
        }

        /* ---------- Responsive ---------- */
        @media (max-width: 991.98px) {
            .nav-toggle {
                display: block;
            }

            .nav-menu {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                align-items: stretch;
                padding: 16px;
                box-shadow: 0 16px 32px rgba(30, 41, 59, .1);
                border-bottom: 1px solid var(--border);
            }

            .nav-menu.open {
                display: flex;
            }

            .nav-menu .nav-link {
                padding: 12px 16px;
                font-size: 1.0625rem;
            }

            .nav-menu .nav-link.active::after {
                display: none;
            }

            .nav-cta {
                margin-top: 8px;
            }

            .nav-cta .btn {
                width: 100%;
            }

            .footer-top {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 767.98px) {
            .page-hero {
                padding: 48px 0;
            }

            .section-head h2 {
                font-size: 1.625rem;
            }

            .intro-section,
            .feature-cards,
            .steps-section,
            .scenario-section,
            .related-section,
            .faq-section,
            .cta-section {
                padding: 48px 0;
            }

            .cta-inner {
                padding: 40px 20px;
            }

            .cta-inner h2 {
                font-size: 1.375rem;
            }

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

        @media (max-width: 575.98px) {
            .footer-top {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .guide-card .card-body {
                padding: 20px 16px;
            }

            .cta-badges {
                gap: 10px;
            }

            .cta-badges span {
                font-size: .8125rem;
            }

            .intro-section h2 {
                font-size: 1.5rem;
            }

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

/* roulang page: category4 */
/* ===== 设计变量 ===== */
        :root {
            --bg: #F7FAFC;
            --surface: #FFFFFF;
            --primary: #3B82F6;
            --primary-light: #EFF6FF;
            --primary-dark: #1D4ED8;
            --secondary: #F59E0B;
            --secondary-light: #FEF3C7;
            --text-main: #1E293B;
            --text-sub: #64748B;
            --border: #E2E8F0;
            --shadow-card: 0 4px 20px rgba(30, 41, 59, 0.06);
            --shadow-card-hover: 0 10px 30px rgba(30, 41, 59, 0.12);
            --radius-card: 16px;
            --radius-btn: 8px;
            --radius-tag: 999px;
            --font-main: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-main);
            background-color: var(--bg);
            color: var(--text-main);
            line-height: 1.75;
            margin: 0;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            margin-top: 0;
            line-height: 1.4;
            color: var(--text-main);
        }
        p {
            margin-top: 0;
        }

        /* ===== 容器 ===== */
        .container {
            max-width: 1200px;
            margin-inline: auto;
            padding-inline: 20px;
        }

        /* ===== 顶部公告条 ===== */
        .top-notice {
            background: var(--primary-light);
            color: var(--primary-dark);
            text-align: center;
            font-size: 0.875rem;
            padding: 8px 16px;
            position: relative;
        }
        .top-notice .close-notice {
            position: absolute;
            right: 16px;
            background: none;
            border: none;
            color: var(--primary-dark);
            cursor: pointer;
            font-size: 0.875rem;
            padding: 4px 8px;
        }

        /* ===== 导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
        }
        .navbar {
            min-height: 64px;
            padding: 0;
        }
        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: nowrap;
            padding-block: 8px;
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-main);
            white-space: nowrap;
        }
        .brand i {
            color: var(--primary);
            font-size: 1.3rem;
        }
        .brand:hover {
            color: var(--text-main);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            padding: 8px;
            cursor: pointer;
        }
        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--text-main);
            border-radius: 2px;
            transition: transform 0.3s ease, opacity 0.3s ease;
        }
        .nav-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-menu li {
            position: relative;
        }
        .nav-menu .nav-link {
            display: block;
            padding: 10px 16px;
            font-size: 0.9375rem;
            font-weight: 500;
            color: var(--text-main);
            border-radius: var(--radius-btn);
            transition: background 0.2s ease, color 0.2s ease;
        }
        .nav-menu .nav-link:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-menu .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-menu .nav-link.active::after {
            content: "";
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: 2px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .nav-cta {
            margin-left: 8px;
        }
        .nav-cta .btn {
            white-space: nowrap;
            padding: 8px 16px;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            padding: 10px 20px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 0.9375rem;
            cursor: pointer;
            transition: all 0.25s ease;
            border: 1px solid transparent;
            text-decoration: none;
        }
        .btn:focus-visible {
            outline: none;
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.3);
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 18px rgba(59, 130, 246, 0.25);
        }
        .btn-primary:active {
            background: #1e40af;
            transform: translateY(0);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary-light);
            color: var(--primary-dark);
        }
        .btn-warning-custom {
            background: var(--secondary);
            color: #fff;
            border-color: var(--secondary);
        }
        .btn-warning-custom:hover {
            background: #d97706;
            border-color: #d97706;
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 18px rgba(245, 158, 11, 0.25);
        }
        .btn-sm {
            padding: 8px 14px;
            font-size: 0.875rem;
        }
        .btn-lg-custom {
            padding: 14px 32px;
            font-size: 1.0625rem;
        }

        /* ===== Hero ===== */
        .category-hero {
            position: relative;
            background: linear-gradient(135deg, #EFF6FF 0%, #F7FAFC 55%, #FFFFFF 100%);
            padding: 80px 0 96px;
            border-bottom: 1px solid var(--border);
            overflow: hidden;
        }
        .category-hero::before {
            content: "";
            position: absolute;
            width: 380px;
            height: 380px;
            border-radius: 50%;
            background: rgba(59, 130, 246, 0.08);
            top: -120px;
            right: -80px;
        }
        .category-hero::after {
            content: "";
            position: absolute;
            width: 220px;
            height: 220px;
            border-radius: 50%;
            background: rgba(245, 158, 11, 0.06);
            bottom: -60px;
            left: 30%;
        }
        .hero-inner {
            position: relative;
            z-index: 2;
            max-width: 820px;
        }
        .breadcrumb-line {
            font-size: 0.8125rem;
            color: var(--text-sub);
            margin-bottom: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }
        .breadcrumb-line a {
            color: var(--text-sub);
        }
        .breadcrumb-line a:hover {
            color: var(--primary);
        }
        .breadcrumb-line .separator {
            color: #94a3b8;
        }
        .category-hero h1 {
            font-size: clamp(2rem, 3.6vw, 2.875rem);
            font-weight: 700;
            line-height: 1.2;
            margin-bottom: 16px;
        }
        .category-hero h1 span {
            color: var(--primary);
        }
        .hero-desc {
            font-size: 1.0625rem;
            color: var(--text-sub);
            max-width: 640px;
            margin-bottom: 28px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }
        .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            margin-top: 40px;
            padding-top: 32px;
            border-top: 1px solid var(--border);
        }
        .hero-meta-item {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-sub);
            font-size: 0.875rem;
        }
        .hero-meta-item i {
            color: var(--primary);
            font-size: 1.125rem;
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 72px 0;
        }
        .section-alt {
            background: var(--surface);
            border-block: 1px solid var(--border);
        }
        .section-header {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 16px;
            margin-bottom: 36px;
            flex-wrap: wrap;
        }
        .section-header .tagline {
            display: inline-block;
            font-size: 0.8125rem;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            padding: 4px 14px;
            border-radius: var(--radius-tag);
            margin-bottom: 10px;
        }
        .section-header h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .section-header p {
            color: var(--text-sub);
            margin-bottom: 0;
            max-width: 600px;
        }

        /* ===== 卡片 ===== */
        .card-custom {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 28px 24px;
            height: 100%;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .card-custom:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }
        .card-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 1.25rem;
            margin-bottom: 16px;
        }
        .card-custom h3 {
            font-size: 1.125rem;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .card-custom p {
            color: var(--text-sub);
            font-size: 0.9375rem;
            margin-bottom: 0;
        }

        /* ===== 问题卡片 ===== */
        .qa-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 32px 24px;
            height: 100%;
            transition: box-shadow 0.3s ease, transform 0.3s ease;
            display: flex;
            flex-direction: column;
        }
        .qa-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }
        .qa-num {
            display: inline-block;
            font-size: 0.875rem;
            font-weight: 700;
            color: var(--primary);
            background: var(--primary-light);
            border-radius: var(--radius-tag);
            padding: 2px 12px;
            align-self: flex-start;
            margin-bottom: 16px;
        }
        .qa-card h3 {
            font-size: 1.125rem;
            font-weight: 600;
            margin-bottom: 12px;
        }
        .qa-card p {
            color: var(--text-sub);
            font-size: 0.9375rem;
            margin-bottom: 16px;
            flex: 1;
        }
        .qa-link {
            font-weight: 600;
            font-size: 0.875rem;
            color: var(--primary);
        }
        .qa-link i {
            transition: transform 0.2s ease;
        }
        .qa-link:hover i {
            transform: translateX(4px);
        }

        /* ===== 手风琴 ===== */
        .faq-accordion .accordion-item {
            border: 1px solid var(--border);
            border-radius: 14px !important;
            overflow: hidden;
            margin-bottom: 14px;
            box-shadow: var(--shadow-card);
            background: var(--surface);
        }
        .faq-accordion .accordion-button {
            padding: 20px 24px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-main);
            background: var(--surface);
            border: none;
            box-shadow: none;
            transition: background 0.2s ease, color 0.2s ease;
        }
        .faq-accordion .accordion-button:not(.collapsed) {
            background: var(--primary-light);
            color: var(--primary-dark);
            box-shadow: none;
        }
        .faq-accordion .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.25);
        }
        .faq-accordion .accordion-button::after {
            filter: hue-rotate(140deg);
        }
        .faq-accordion .accordion-body {
            padding: 20px 24px;
            color: var(--text-sub);
            line-height: 1.8;
            font-size: 0.9375rem;
            background: var(--surface);
            border-top: 1px solid var(--primary-light);
        }

        /* ===== 流程 ===== */
        .step-card {
            text-align: center;
            padding: 36px 20px;
            position: relative;
            height: 100%;
        }
        .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 18px;
            box-shadow: 0 8px 20px rgba(59, 130, 246, 0.2);
        }
        .step-card h3 {
            font-size: 1.125rem;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .step-card p {
            color: var(--text-sub);
            font-size: 0.9375rem;
            margin-bottom: 0;
        }

        /* ===== 推荐卡片 ===== */
        .recommend-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            height: 100%;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .recommend-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }
        .recommend-thumb {
            aspect-ratio: 16/9;
            overflow: hidden;
            background: var(--primary-light);
        }
        .recommend-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .recommend-card:hover .recommend-thumb img {
            transform: scale(1.04);
        }
        .recommend-body {
            padding: 22px 20px;
        }
        .recommend-body h3 {
            font-size: 1.0625rem;
            font-weight: 600;
            margin-bottom: 8px;
            line-height: 1.5;
        }
        .recommend-body p {
            color: var(--text-sub);
            font-size: 0.875rem;
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .recommend-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.8125rem;
            color: var(--text-sub);
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--primary-light);
            border-block: 1px solid var(--border);
            padding: 64px 0;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 1.75rem;
            font-weight: 700;
            margin-bottom: 14px;
        }
        .cta-section p {
            color: var(--text-sub);
            max-width: 520px;
            margin: 0 auto 28px;
        }
        .cta-badges {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 24px;
            margin-top: 32px;
        }
        .cta-badge {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.875rem;
            color: var(--text-sub);
        }
        .cta-badge i {
            color: var(--primary);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #0F172A;
            color: rgba(255, 255, 255, 0.75);
            padding-top: 56px;
        }
        .footer-top {
            display: grid;
            grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr;
            gap: 40px;
            padding-bottom: 44px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand {
            font-size: 1.375rem;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 14px;
        }
        .footer-brand i {
            color: var(--primary);
        }
        .footer-desc {
            font-size: 0.875rem;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            max-width: 360px;
        }
        .footer-col h5 {
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.875rem;
            transition: color 0.2s ease;
        }
        .footer-col ul a:hover {
            color: #fff;
            text-decoration: underline;
        }
        .footer-bottom {
            padding: 20px 0;
            text-align: center;
            font-size: 0.8125rem;
            color: rgba(255, 255, 255, 0.5);
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }

        /* ===== 移动端适配 ===== */
        @media (max-width: 991.98px) {
            .nav-toggle {
                display: flex;
            }
            .nav-menu {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                align-items: stretch;
                padding: 12px 20px 20px;
                border-bottom: 1px solid var(--border);
                box-shadow: 0 20px 30px rgba(30, 41, 59, 0.1);
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu .nav-link {
                font-size: 1.0625rem;
                line-height: 48px;
                padding: 0 12px;
                border-radius: 8px;
            }
            .nav-menu .nav-link.active::after {
                display: none;
            }
            .nav-cta {
                margin-left: 0;
                margin-top: 12px;
            }
            .nav-cta .btn {
                width: 100%;
            }
            .category-hero {
                padding: 60px 0 72px;
            }
            .section {
                padding: 48px 0;
            }
            .footer-top {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 767.98px) {
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn {
                justify-content: center;
            }
            .section-header {
                flex-direction: column;
                align-items: flex-start;
            }
            .section-header h2 {
                font-size: 1.625rem;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
        }

        @media (max-width: 575.98px) {
            .container {
                padding-inline: 16px;
            }
            .brand {
                font-size: 1.0625rem;
            }
            .category-hero {
                padding: 44px 0 56px;
            }
            .category-hero h1 {
                font-size: 1.75rem;
            }
            .hero-desc {
                font-size: 0.9375rem;
            }
            .hero-meta {
                gap: 14px;
                padding-top: 24px;
            }
            .hero-meta-item {
                font-size: 0.8125rem;
                width: calc(50% - 14px);
            }
            .section {
                padding: 40px 0;
            }
            .footer-top {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .btn-lg-custom {
                width: 100%;
            }
            .top-notice {
                display: none;
            }
        }