/* roulang page: index */
:root {
    --zk-green: #2E4B3C;
    --zk-green-light: #3A604D;
    --zk-gold: #B8860B;
    --zk-gold-light: #D4A017;
    --zk-amber: #D9823D;
    --zk-bg: #F7F5F0;
    --zk-surface: #FFFFFF;
    --zk-dark: #24342B;
    --zk-ink: #1B2922;
    --zk-text: #202620;
    --zk-text-2: #5A625D;
    --zk-text-3: #8A928D;
    --zk-border: rgba(46, 75, 60, 0.12);
    --zk-radius-card: 14px;
    --zk-radius-btn: 999px;
    --zk-radius-input: 12px;
    --zk-shadow: 0 2px 10px rgba(36, 52, 43, 0.06);
    --zk-shadow-lg: 0 10px 24px rgba(36, 52, 43, 0.12);
    --zk-font: 'Noto Sans SC', 'PingFang SC', 'HarmonyOS Sans SC', 'Microsoft YaHei', sans-serif;
    --zk-mono: 'IBM Plex Mono', 'SF Mono', Consolas, monospace;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--zk-font);
    background: var(--zk-bg);
    color: var(--zk-text);
    line-height: 1.75;
    font-size: 16px;
    padding-bottom: calc(64px + env(safe-area-inset-bottom));
}
@media (min-width: 768px) { body { padding-bottom: 0; } }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--zk-green); text-decoration: none; transition: color .2s; }
a:hover { color: var(--zk-gold); }
h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; color: var(--zk-text); }
.container { max-width: 1200px; padding-left: 20px; padding-right: 20px; }
section { padding: 80px 0; }
@media (max-width: 767px) { section { padding: 56px 0; } }

.btn {
    display: inline-flex; align-items: center; justify-content: center;
    border-radius: var(--zk-radius-btn); font-weight: 600; padding: 12px 28px;
    border: 1px solid transparent; transition: all .25s ease; font-size: 15px; line-height: 1.4;
}
.btn:focus { box-shadow: 0 0 0 3px rgba(46, 75, 60, .2); }
.btn-primary {
    background: var(--zk-green); color: #fff; border-color: var(--zk-green);
}
.btn-primary:hover { background: var(--zk-gold); border-color: var(--zk-gold); color: #fff; transform: translateY(-1px); }
.btn-primary:active { transform: scale(.98); }
.btn-outline {
    background: transparent; color: var(--zk-green); border: 1px solid var(--zk-green);
}
.btn-outline:hover { background: rgba(46, 75, 60, .08); border-color: var(--zk-green); color: var(--zk-green); }
.btn-outline:active { transform: scale(.98); }

.site-header {
    position: sticky; top: 0; z-index: 1000;
    background: var(--zk-bg);
    height: 72px;
    border-bottom: 1px solid var(--zk-border);
    display: flex; align-items: center;
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; }
.brand { display: flex; align-items: center; gap: 10px; }
.brand-logo {
    width: 38px; height: 38px; border-radius: 12px;
    background: var(--zk-green); display: flex; align-items: center; justify-content: center;
    color: #fff; font-weight: 700; font-size: 16px;
    border: 1px solid var(--zk-gold);
}
.brand-text { font-size: 20px; font-weight: 700; color: var(--zk-text); letter-spacing: .5px; }
.main-nav { display: flex; align-items: center; gap: 4px; }
.nav-link-custom {
    padding: 8px 16px !important; font-size: 15px; font-weight: 500;
    color: var(--zk-text-2) !important; border-radius: 999px;
    position: relative; transition: color .2s;
}
.nav-link-custom:hover { color: var(--zk-green) !important; background: rgba(46, 75, 60, .06); }
.nav-link-custom.active { color: var(--zk-green) !important; font-weight: 600; }
.nav-link-custom.active::after {
    content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%);
    width: 20px; height: 3px; border-radius: 3px; background: var(--zk-gold);
}
.header-cta { margin-left: 12px; }
.header-cta .btn { padding: 9px 22px; font-size: 14px; }

.dropdown-menu {
    border-radius: 12px; border: 1px solid var(--zk-border);
    box-shadow: var(--zk-shadow-lg); padding: 8px; background: var(--zk-surface);
}
.dropdown-item { border-radius: 8px; padding: 8px 14px; font-size: 14px; color: var(--zk-text); }
.dropdown-item:hover { background: rgba(46, 75, 60, .06); color: var(--zk-green); }

.hero-section {
    min-height: 78vh;
    display: flex; align-items: center;
    background: linear-gradient(135deg, rgba(247, 245, 240, .95) 0%, rgba(247, 245, 240, .85) 40%, rgba(46, 75, 60, .55) 100%),
                url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
    position: relative;
}
@media (max-width: 767px) { .hero-section { min-height: 60vh; } }
.hero-badge {
    display: inline-block; padding: 6px 18px; border: 1px solid var(--zk-gold);
    border-radius: 999px; color: var(--zk-gold); font-size: 13px; font-weight: 600;
    background: rgba(255, 255, 255, .6); margin-bottom: 20px; letter-spacing: 1px;
}
.hero-section h1 {
    font-size: clamp(2.4rem, 5vw, 3.5rem);
    font-weight: 700; line-height: 1.2; margin-bottom: 18px; max-width: 700px;
}
.hero-section .hero-subtitle {
    font-size: 18px; color: var(--zk-text-2); line-height: 1.6; max-width: 520px; margin-bottom: 32px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-scroll {
    position: absolute; bottom: 24px; left: 50%; transform: translateX(-50%);
    color: var(--zk-text-3); font-size: 13px;
    display: flex; flex-direction: column; align-items: center; gap: 4px;
}
.hero-scroll svg { width: 22px; height: 22px; animation: bounce 2s infinite; }
@keyframes bounce { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(6px); } }

.stats-section { background: var(--zk-surface); padding: 50px 0; border-bottom: 1px solid var(--zk-border); }
.stats-row { display: flex; justify-content: space-around; text-align: center; }
.stat-item { padding: 10px 20px; position: relative; }
.stat-item + .stat-item::before {
    content: ''; position: absolute; left: 0; top: 50%; transform: translateY(-50%);
    width: 1px; height: 48px; background: var(--zk-border);
}
.stat-num { font-family: var(--zk-mono); font-size: 36px; font-weight: 700; color: var(--zk-green); display: block; line-height: 1.2; }
.stat-label { font-size: 14px; color: var(--zk-text-2); }
@media (max-width: 576px) {
    .stats-row { flex-direction: column; gap: 16px; }
    .stat-item + .stat-item::before { display: none; }
}

.features-section { background: var(--zk-bg); }
.section-title {
    text-align: center; font-size: clamp(1.5rem, 3vw, 2.1rem);
    font-weight: 700; margin-bottom: 14px;
}
.section-subtitle { text-align: center; color: var(--zk-text-2); font-size: 15px; max-width: 640px; margin: 0 auto 50px; line-height: 1.7; }
.features-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; max-width: 960px; margin: 0 auto; }
.feature-card {
    background: var(--zk-surface); border: 1px solid var(--zk-border);
    border-radius: var(--zk-radius-card); padding: 28px;
    box-shadow: var(--zk-shadow); transition: box-shadow .3s, transform .3s;
}
.feature-card:hover { box-shadow: var(--zk-shadow-lg); transform: translateY(-2px); }
.feature-center { grid-column: 1 / -1; max-width: 50%; justify-self: center; width: 100%; }
.feature-icon {
    width: 48px; height: 48px; border-radius: 12px;
    background: rgba(46, 75, 60, .08); display: flex; align-items: center; justify-content: center;
    margin-bottom: 18px; color: var(--zk-green); transition: background .3s, color .3s;
}
.feature-icon svg { width: 24px; height: 24px; }
.feature-card:hover .feature-icon { background: rgba(184, 134, 11, .12); color: var(--zk-gold); }
.feature-card h3 { font-size: 1.25rem; font-weight: 600; margin-bottom: 8px; }
.feature-card p { color: var(--zk-text-2); font-size: 14px; line-height: 1.7; margin: 0; }
@media (max-width: 767px) {
    .features-grid { grid-template-columns: 1fr; }
    .feature-center { grid-column: 1; max-width: 100%; }
}

.screenshot-section { background: var(--zk-surface); }
.carousel-inner { border-radius: var(--zk-radius-card); overflow: hidden; max-width: 900px; margin: 0 auto; }
.carousel-item { background: var(--zk-bg); padding: 20px; }
.screenshot-frame {
    border-radius: 12px; border: 2px solid var(--zk-border);
    background: var(--zk-surface); overflow: hidden; box-shadow: var(--zk-shadow);
}
.frame-browser-bar {
    display: flex; align-items: center; gap: 6px; padding: 8px 14px;
    background: #f0ede8; border-bottom: 1px solid var(--zk-border);
}
.frame-dot { width: 10px; height: 10px; border-radius: 50%; }
.frame-dot.red { background: #e07a6a; }
.frame-dot.yellow { background: #e0c06a; }
.frame-dot.green { background: #7ab57a; }
.frame-url { flex: 1; height: 10px; background: #ddd; border-radius: 5px; margin-left: 10px; max-width: 200px; }
.frame-body { padding: 24px; display: flex; gap: 20px; min-height: 240px; }
.frame-line { background: #e8e5df; height: 12px; border-radius: 6px; margin-bottom: 10px; }
.frame-line.short { width: 60%; }
.frame-line.tiny { width: 35%; height: 8px; }
.frame-thumb { flex: 1; background: linear-gradient(135deg, #e0dcd4, #c5d0c6); border-radius: 10px; min-height: 180px; display: flex; align-items: center; justify-content: center; color: var(--zk-text-3); font-size: 13px; }
.phone-frame {
    max-width: 300px; margin: 0 auto; border-radius: 32px;
    border: 4px solid var(--zk-text); background: var(--zk-surface);
    overflow: hidden; box-shadow: var(--zk-shadow-lg);
}
.phone-notch { height: 28px; background: var(--zk-text); display: flex; align-items: center; justify-content: center; gap: 4px; }
.phone-notch span { width: 40px; height: 6px; background: #444; border-radius: 3px; }
.phone-screen { padding: 20px; min-height: 300px; }
.carousel-caption-custom { text-align: center; padding: 20px 0 10px; max-width: 600px; margin: 0 auto; }
.carousel-caption-custom h3 { font-size: 1.25rem; font-weight: 600; margin-bottom: 4px; }
.carousel-caption-custom p { color: var(--zk-text-2); font-size: 14px; margin: 0; }
.carousel-control-prev, .carousel-control-next {
    width: 44px; height: 44px; border-radius: 50%; background: var(--zk-surface);
    border: 1px solid var(--zk-green); top: 40%; transform: translateY(-50%);
    opacity: 1; transition: background .3s;
}
.carousel-control-prev:hover, .carousel-control-next:hover { background: var(--zk-green); }
.carousel-control-prev-icon, .carousel-control-next-icon { filter: invert(1) sepia(1) saturate(5) hue-rotate(60deg); }
.carousel-indicators { bottom: -10px; }
.carousel-indicators button {
    width: 8px; height: 8px; border-radius: 4px; background: var(--zk-gold);
    border: none; transition: width .3s; opacity: .4;
}
.carousel-indicators button.active { width: 24px; opacity: 1; }

.requirements-section { background: var(--zk-bg); }
.req-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; max-width: 960px; margin: 0 auto; }
.req-card {
    background: var(--zk-surface); border: 1px solid var(--zk-border);
    border-radius: var(--zk-radius-card); padding: 30px; box-shadow: var(--zk-shadow);
    display: flex; flex-direction: column;
}
.req-card h3 { font-size: 1.25rem; font-weight: 600; margin-bottom: 20px; display: flex; align-items: center; gap: 8px; }
.platform-badges { display: flex; flex-wrap: wrap; gap: 10px; margin-top: auto; }
.platform-badge {
    padding: 8px 16px; border-radius: 10px; background: rgba(46, 75, 60, .06);
    color: var(--zk-green); font-size: 14px; font-weight: 600; border: 1px solid transparent;
    transition: border .3s, background .3s;
}
.platform-badge:hover { border-color: var(--zk-gold); background: rgba(184, 134, 11, .06); }
.req-list { display: flex; flex-direction: column; gap: 12px; }
.req-item { display: flex; align-items: center; justify-content: space-between; padding: 10px 14px; background: var(--zk-bg); border-radius: 10px; }
.req-label { color: var(--zk-text-2); font-size: 14px; }
.req-value { font-family: var(--zk-mono); font-size: 14px; color: var(--zk-green); font-weight: 600; }
@media (max-width: 767px) {
    .req-cards { grid-template-columns: 1fr; }
}

.reviews-section { background: var(--zk-surface); }
.reviews-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; max-width: 1100px; margin: 0 auto; }
.review-card {
    background: var(--zk-surface); border: 1px solid var(--zk-border);
    border-radius: var(--zk-radius-card); padding: 24px; box-shadow: var(--zk-shadow);
    transition: box-shadow .3s;
}
.review-card:hover { box-shadow: var(--zk-shadow-lg); }
.review-stars { display: flex; gap: 2px; margin-bottom: 12px; color: var(--zk-amber); }
.review-stars svg { width: 18px; height: 18px; }
.review-text { font-size: 14px; color: var(--zk-text); line-height: 1.7; margin-bottom: 16px; }
.review-user { display: flex; align-items: center; gap: 10px; }
.review-avatar {
    width: 36px; height: 36px; border-radius: 50%;
    background: var(--zk-green); color: #fff; display: flex; align-items: center; justify-content: center;
    font-size: 14px; font-weight: 700;
}
.review-name { font-size: 13px; color: var(--zk-text-2); }
.review-role { font-size: 12px; color: var(--zk-text-3); }
@media (max-width: 991px) {
    .reviews-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 576px) {
    .reviews-grid { grid-template-columns: 1fr; }
}

.download-section {
    background: var(--zk-dark); color: #ebefe8;
}
.download-section .section-title { color: #f0f3ee; }
.download-section .section-subtitle { color: #a8b5aa; }
.download-buttons { display: flex; flex-wrap: wrap; justify-content: center; gap: 20px; margin-bottom: 30px; }
.download-btn {
    display: flex; align-items: center; gap: 10px;
    background: var(--zk-surface); color: var(--zk-green);
    border-radius: var(--zk-radius-btn); padding: 14px 28px;
    border: none; transition: all .3s; min-width: 220px;
}
.download-btn:hover { background: var(--zk-gold); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 20px rgba(0, 0, 0, .15); }
.download-btn svg { width: 28px; height: 28px; }
.download-btn-info { display: flex; flex-direction: column; text-align: left; line-height: 1.3; }
.download-btn-platform { font-size: 16px; font-weight: 600; }
.download-btn-meta { font-size: 12px; opacity: .65; font-family: var(--zk-mono); }
.qr-block {
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    background: var(--zk-surface); border-radius: var(--zk-radius-card);
    padding: 18px; width: 140px; margin: 0 auto;
}
.qr-placeholder {
    width: 100px; height: 100px; background: linear-gradient(45deg, #2e4b3c 25%, #fff 25%, #fff 50%, #2e4b3c 50%, #2e4b3c 75%, #fff 75%, #fff);
    background-size: 20px 20px; border: 1px solid var(--zk-border); border-radius: 8px;
}
.qr-text { font-size: 12px; color: var(--zk-text-2); margin-top: 8px; }
.download-note { text-align: center; font-size: 13px; color: #8fa396; margin-top: 24px; font-family: var(--zk-mono); }

.news-section { background: var(--zk-bg); }
.news-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 40px; }
.news-header .section-title { margin-bottom: 0; text-align: left; }
.news-more { color: var(--zk-green); font-size: 14px; font-weight: 500; }
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-card {
    background: var(--zk-surface); border: 1px solid var(--zk-border);
    border-radius: var(--zk-radius-card); padding: 24px;
    box-shadow: var(--zk-shadow); transition: box-shadow .3s, transform .3s;
    display: flex; flex-direction: column;
}
.news-card:hover { box-shadow: var(--zk-shadow-lg); transform: translateY(-2px); }
.news-meta { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.news-date { font-family: var(--zk-mono); font-size: 12px; color: var(--zk-text-3); }
.news-tag {
    padding: 3px 12px; border: 1px solid var(--zk-gold); border-radius: 999px;
    font-size: 11px; color: var(--zk-gold); font-weight: 600;
}
.news-card h3 { font-size: 16px; font-weight: 600; line-height: 1.5; margin-bottom: 10px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-card h3 a { color: var(--zk-text); }
.news-card h3 a:hover { color: var(--zk-gold); }
.news-card .news-excerpt { font-size: 14px; color: var(--zk-text-2); line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; flex: 1; margin-bottom: 14px; }
.read-more { font-size: 13px; color: var(--zk-green); font-weight: 500; margin-top: auto; }
.read-more:hover { color: var(--zk-gold); }
.empty-state {
    border: 2px dashed var(--zk-border); border-radius: var(--zk-radius-card);
    padding: 60px 20px; text-align: center; color: var(--zk-text-3); background: var(--zk-surface);
}
.empty-state svg { width: 40px; height: 40px; margin-bottom: 10px; opacity: .4; }
.empty-state p { font-size: 14px; margin: 0; }
@media (max-width: 991px) {
    .news-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 576px) {
    .news-grid { grid-template-columns: 1fr; }
}

.site-footer { background: var(--zk-ink); color: #a8b5aa; padding: 0; }
.footer-main { padding: 60px 0 30px; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 40px; }
.footer-brand { font-size: 20px; font-weight: 700; color: #fff; margin-bottom: 10px; display: flex; align-items: center; gap: 10px; }
.footer-brand-logo {
    width: 34px; height: 34px; border-radius: 10px; background: var(--zk-green);
    display: flex; align-items: center; justify-content: center; color: #fff; font-size: 14px;
    border: 1px solid var(--zk-gold);
}
.footer-desc { font-size: 14px; line-height: 1.7; margin-bottom: 20px; max-width: 280px; }
.social-links { display: flex; gap: 10px; }
.social-link {
    width: 34px; height: 34px; border-radius: 50%; background: rgba(255, 255, 255, .08);
    display: flex; align-items: center; justify-content: center; color: #a8b5aa;
    transition: background .3s, color .3s;
}
.social-link:hover { background: var(--zk-gold); color: #fff; }
.footer-col h4 { font-size: 15px; color: #fff; margin-bottom: 16px; font-weight: 600; }
.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul a { color: #a8b5aa; font-size: 14px; transition: color .2s; }
.footer-col ul a:hover { color: var(--zk-gold); }
.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, .06); padding: 18px 0;
    background: #141c17; font-size: 13px; text-align: center; color: rgba(255, 255, 255, .45);
}
.footer-bottom a { color: rgba(255, 255, 255, .55); }
.footer-bottom a:hover { color: var(--zk-gold); }
@media (max-width: 991px) {
    .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 576px) {
    .footer-grid { grid-template-columns: 1fr; gap: 24px; }
}

.mobile-tabbar {
    position: fixed; bottom: 0; left: 0; right: 0; z-index: 1050;
    background: var(--zk-surface); border-top: 1px solid var(--zk-border);
    height: 64px; padding-bottom: env(safe-area-inset-bottom);
    display: flex; align-items: center; justify-content: space-around;
}
.mobile-tab {
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    gap: 2px; padding: 6px 10px; color: var(--zk-text-3); font-size: 12px;
    transition: color .2s;
}
.mobile-tab svg { width: 24px; height: 24px; }
.mobile-tab:hover { color: var(--zk-green); }
.mobile-tab.active { color: var(--zk-green); font-weight: 600; }
.mobile-tab.active svg { stroke-width: 2.4; }
@media (min-width: 768px) {
    .mobile-tabbar { display: none; }
}

@media (max-width: 767px) {
    .site-header { height: 64px; }
    .main-nav, .header-cta { display: none; }
    .brand-text { font-size: 18px; }
}

.dropdown-toggle::after { border-top-color: var(--zk-green); }

/* roulang page: article */
:root {
    --zk-green: #2E4B3C;
    --zk-gold: #B8860B;
    --zk-amber: #D9823D;
    --zk-bg: #F7F5F0;
    --zk-surface: #FFFFFF;
    --zk-dark: #24342B;
    --zk-ink: #1B2922;
    --zk-text: #202620;
    --zk-sub: #5A625D;
    --zk-muted: #8A928D;
    --zk-border: rgba(46, 75, 60, 0.12);
    --zk-radius-card: 14px;
    --zk-radius-btn: 999px;
    --zk-shadow-sm: 0 2px 10px rgba(36, 52, 43, 0.06);
    --zk-shadow-lg: 0 10px 24px rgba(36, 52, 43, 0.12);
    --zk-font-cn: 'Noto Sans SC', 'PingFang SC', 'HarmonyOS Sans SC', 'Microsoft YaHei', sans-serif;
    --zk-font-mono: 'IBM Plex Mono', 'SF Mono', 'Consolas', monospace;
}
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
html {
    scroll-behavior: smooth;
}
body {
    font-family: var(--zk-font-cn);
    background: var(--zk-bg);
    color: var(--zk-text);
    font-size: 16px;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
    padding-bottom: calc(64px + env(safe-area-inset-bottom));
}
@media (min-width: 768px) {
    body { padding-bottom: 0; }
}
a {
    color: var(--zk-green);
    text-decoration: none;
    transition: color 0.25s ease;
}
a:hover {
    color: var(--zk-gold);
}
img {
    max-width: 100%;
    height: auto;
}
.container {
    max-width: 1200px;
    padding-left: 20px;
    padding-right: 20px;
}
/* ── Header ── */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(247, 245, 240, 0.97);
    border-bottom: 1px solid var(--zk-border);
    height: 72px;
    display: flex;
    align-items: center;
}
.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}
.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}
.brand-logo {
    width: 34px;
    height: 34px;
    background: var(--zk-green);
    color: #fff;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 14px;
    letter-spacing: 0.5px;
    box-shadow: 0 2px 8px rgba(46, 75, 60, 0.2);
}
.brand-text {
    font-size: 18px;
    font-weight: 700;
    color: var(--zk-text);
    letter-spacing: 0.02em;
}
.main-nav {
    display: none;
    align-items: center;
    gap: 28px;
}
@media (min-width: 768px) {
    .main-nav { display: flex; }
}
.nav-link-custom {
    font-size: 15px;
    font-weight: 500;
    color: var(--zk-sub);
    padding: 6px 2px;
    position: relative;
    transition: color 0.25s ease;
}
.nav-link-custom::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--zk-gold);
    transition: width 0.3s ease;
}
.nav-link-custom:hover {
    color: var(--zk-green);
}
.nav-link-custom:hover::after,
.nav-link-custom.active::after {
    width: 100%;
}
.nav-link-custom.active {
    color: var(--zk-green);
    font-weight: 600;
}
.dropdown-menu {
    border-radius: 12px;
    border: 1px solid var(--zk-border);
    box-shadow: var(--zk-shadow-lg);
    padding: 8px;
    margin-top: 8px;
    background: var(--zk-surface);
}
.dropdown-item {
    border-radius: 8px;
    padding: 8px 14px;
    font-size: 14px;
    color: var(--zk-text);
    transition: all 0.2s ease;
}
.dropdown-item:hover {
    background: rgba(46, 75, 60, 0.08);
    color: var(--zk-green);
}
.header-cta {
    display: none;
    flex-shrink: 0;
}
@media (min-width: 768px) {
    .header-cta { display: block; }
}
.btn-primary {
    background: var(--zk-green);
    color: #fff;
    border: 1px solid var(--zk-green);
    border-radius: var(--zk-radius-btn);
    padding: 10px 24px;
    font-weight: 600;
    font-size: 14px;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.btn-primary:hover {
    background: var(--zk-gold);
    border-color: var(--zk-gold);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(184, 134, 11, 0.25);
}
.btn-primary:active {
    transform: scale(0.98);
}
.btn-outline-zk {
    background: transparent;
    border: 1px solid var(--zk-green);
    color: var(--zk-green);
    border-radius: var(--zk-radius-btn);
    padding: 10px 24px;
    font-weight: 600;
    font-size: 14px;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.btn-outline-zk:hover {
    background: rgba(46, 75, 60, 0.1);
    color: var(--zk-green);
}
.btn-outline-zk:active {
    transform: scale(0.98);
}
/* ── Mobile Bottom Tabs ── */
.mobile-tabs {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 1100;
    display: flex;
    background: var(--zk-surface);
    border-top: 1px solid var(--zk-border);
    height: calc(64px + env(safe-area-inset-bottom));
    padding-bottom: env(safe-area-inset-bottom);
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.04);
}
@media (min-width: 768px) {
    .mobile-tabs { display: none; }
}
.tab-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    color: var(--zk-muted);
    font-size: 12px;
    font-weight: 500;
    transition: color 0.25s ease;
    position: relative;
}
.tab-item svg {
    width: 22px;
    height: 22px;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.8;
    stroke-linecap: round;
    stroke-linejoin: round;
}
.tab-item.active {
    color: var(--zk-green);
    font-weight: 600;
}
.tab-item.active::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 3px;
    border-radius: 0 0 4px 4px;
    background: var(--zk-gold);
}
.tab-dropdown .dropdown-menu {
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    min-width: 160px;
    border-radius: 12px;
}
/* ── Breadcrumb ── */
.breadcrumb-wrap {
    padding: 28px 0 8px;
    font-size: 13px;
    color: var(--zk-muted);
    font-family: var(--zk-font-mono);
}
.breadcrumb-wrap a {
    color: var(--zk-muted);
    text-decoration: none;
    transition: color 0.2s ease;
}
.breadcrumb-wrap a:hover {
    color: var(--zk-gold);
}
.breadcrumb-wrap .current {
    color: var(--zk-green);
    font-weight: 500;
}
.breadcrumb-sep {
    margin: 0 8px;
    color: var(--zk-muted);
}
/* ── Article Layout ── */
.article-page {
    padding: 20px 0 60px;
}
.article-shell {
    max-width: 860px;
    margin: 0 auto;
    background: var(--zk-surface);
    border-radius: 18px;
    border: 1px solid var(--zk-border);
    box-shadow: var(--zk-shadow-sm);
    padding: 32px 24px;
    position: relative;
}
@media (min-width: 768px) {
    .article-shell {
        padding: 48px 56px;
    }
}
.article-shell::before {
    content: '';
    position: absolute;
    top: 0;
    left: 24px;
    right: 24px;
    height: 3px;
    background: linear-gradient(90deg, var(--zk-green) 0%, var(--zk-gold) 50%, var(--zk-green) 100%);
    border-radius: 0 0 6px 6px;
}
.article-category-pill {
    display: inline-block;
    padding: 4px 16px;
    border: 1px solid var(--zk-gold);
    border-radius: 999px;
    font-size: 12px;
    font-weight: 600;
    color: var(--zk-gold);
    letter-spacing: 0.03em;
    margin-bottom: 18px;
    background: rgba(184, 134, 11, 0.06);
}
.article-title {
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    font-weight: 700;
    line-height: 1.25;
    color: var(--zk-text);
    margin-bottom: 16px;
    letter-spacing: -0.01em;
}
.article-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 16px;
    font-family: var(--zk-font-mono);
    font-size: 13px;
    color: var(--zk-muted);
    padding-bottom: 24px;
    border-bottom: 1px dashed var(--zk-border);
    margin-bottom: 28px;
}
.article-meta .meta-item {
    display: inline-flex;
    align-items: center;
    gap: 5px;
}
.article-meta .meta-dot {
    width: 3px;
    height: 3px;
    border-radius: 50%;
    background: var(--zk-gold);
    display: inline-block;
}
/* ── Article Body ── */
.article-body {
    font-size: 16px;
    line-height: 1.85;
    color: var(--zk-text);
}
.article-body p {
    margin-bottom: 1.5em;
}
.article-body p:first-of-type {
    font-weight: 500;
}
.article-body h2 {
    font-size: 1.55rem;
    font-weight: 700;
    margin-top: 2em;
    margin-bottom: 0.8em;
    color: var(--zk-green);
    position: relative;
    padding-left: 14px;
}
.article-body h2::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.18em;
    bottom: 0.18em;
    width: 4px;
    border-radius: 4px;
    background: linear-gradient(180deg, var(--zk-gold), var(--zk-green));
}
.article-body h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-top: 1.6em;
    margin-bottom: 0.6em;
    color: var(--zk-text);
}
.article-body blockquote {
    border-left: 4px solid var(--zk-green);
    background: rgba(46, 75, 60, 0.05);
    padding: 16px 20px;
    border-radius: 0 12px 12px 0;
    margin: 1.5em 0;
    font-style: normal;
    color: var(--zk-sub);
}
.article-body blockquote p:last-child {
    margin-bottom: 0;
}
.article-body img {
    border-radius: 14px;
    border: 1px solid var(--zk-border);
    margin: 1.5em 0;
    box-shadow: var(--zk-shadow-sm);
}
.article-body code {
    font-family: var(--zk-font-mono);
    background: rgba(46, 75, 60, 0.08);
    padding: 2px 8px;
    border-radius: 6px;
    font-size: 0.9em;
    color: var(--zk-green);
}
.article-body pre {
    background: var(--zk-ink);
    color: #E8E0D0;
    border-radius: 12px;
    padding: 20px 24px;
    overflow-x: auto;
    margin: 1.5em 0;
    font-family: var(--zk-font-mono);
    font-size: 14px;
    line-height: 1.7;
}
.article-body pre code {
    background: transparent;
    color: inherit;
    padding: 0;
}
.article-body ul, .article-body ol {
    margin: 1em 0 1.5em;
    padding-left: 1.4em;
}
.article-body li {
    margin-bottom: 0.5em;
}
.article-body a {
    color: var(--zk-green);
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-color: rgba(46, 75, 60, 0.3);
}
.article-body a:hover {
    color: var(--zk-gold);
    text-decoration-color: var(--zk-gold);
}
/* ── Empty State ── */
.article-empty {
    text-align: center;
    padding: 80px 24px;
    max-width: 860px;
    margin: 0 auto;
    background: var(--zk-surface);
    border-radius: 18px;
    border: 2px dashed var(--zk-border);
}
.article-empty svg {
    width: 56px;
    height: 56px;
    color: var(--zk-muted);
    margin-bottom: 20px;
}
.article-empty p {
    font-size: 18px;
    color: var(--zk-sub);
    margin-bottom: 16px;
}
.article-empty a {
    color: var(--zk-green);
    font-weight: 600;
}
/* ── Tags & Footer Nav ── */
.article-tags {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    margin-top: 36px;
    padding-top: 24px;
    border-top: 1px dashed var(--zk-border);
}
.tag-pill {
    display: inline-block;
    padding: 4px 14px;
    border: 1px solid var(--zk-gold);
    border-radius: 999px;
    font-size: 12px;
    font-weight: 500;
    color: var(--zk-gold);
    background: rgba(184, 134, 11, 0.04);
    transition: all 0.25s ease;
}
.tag-pill:hover {
    background: var(--zk-gold);
    color: #fff;
    transform: translateY(-1px);
}
.article-back-row {
    margin-top: 24px;
    display: flex;
    justify-content: center;
}
/* ── Related Reads ── */
.related-section {
    max-width: 860px;
    margin: 48px auto 0;
}
.related-section .section-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--zk-text);
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
}
.related-section .section-title::after {
    content: '';
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, var(--zk-gold), transparent);
}
.related-card {
    background: var(--zk-surface);
    border-radius: 14px;
    border: 1px solid var(--zk-border);
    box-shadow: var(--zk-shadow-sm);
    overflow: hidden;
    display: flex;
    transition: all 0.3s ease;
    height: 100%;
}
.related-card:hover {
    box-shadow: var(--zk-shadow-lg);
    transform: translateY(-3px);
}
.related-thumb {
    width: 160px;
    min-height: 120px;
    flex-shrink: 0;
    overflow: hidden;
    position: relative;
}
.related-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}
.related-card:hover .related-thumb img {
    transform: scale(1.05);
}
.related-body {
    padding: 18px 20px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}
.related-body h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--zk-text);
    line-height: 1.4;
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.related-body p {
    font-size: 14px;
    color: var(--zk-sub);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 10px;
}
.related-more-link {
    font-size: 13px;
    font-weight: 600;
    color: var(--zk-green);
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: color 0.25s ease;
}
.related-more-link:hover {
    color: var(--zk-gold);
}
@media (max-width: 767px) {
    .related-thumb {
        width: 120px;
        min-height: 100px;
    }
    .related-body {
        padding: 14px 16px;
    }
    .related-body h3 {
        font-size: 15px;
    }
}
/* ── Footer ── */
.site-footer {
    background: var(--zk-ink);
    color: rgba(255, 255, 255, 0.8);
    margin-top: 60px;
}
.footer-main {
    padding: 56px 20px 40px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 36px;
}
@media (min-width: 768px) {
    .footer-grid {
        grid-template-columns: 1.4fr 1fr 1fr 1fr;
        gap: 48px;
    }
}
.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 18px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 14px;
}
.footer-brand-logo {
    width: 30px;
    height: 30px;
    background: var(--zk-gold);
    color: var(--zk-ink);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
}
.footer-desc {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.55);
    line-height: 1.7;
    margin-bottom: 18px;
    max-width: 280px;
}
.social-links {
    display: flex;
    gap: 10px;
}
.social-link {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, 0.6);
    transition: all 0.3s ease;
}
.social-link:hover {
    background: var(--zk-gold);
    border-color: var(--zk-gold);
    color: var(--zk-ink);
}
.footer-col h4 {
    font-size: 15px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 16px;
    letter-spacing: 0.03em;
}
.footer-col ul {
    list-style: none;
    padding: 0;
    margin: 0;
}
.footer-col li {
    margin-bottom: 10px;
}
.footer-col a {
    color: rgba(255, 255, 255, 0.55);
    font-size: 14px;
    transition: color 0.25s ease;
}
.footer-col a:hover {
    color: var(--zk-gold);
}
.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 20px 0;
    background: rgba(0, 0, 0, 0.2);
}
.footer-bottom-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.4);
    font-family: var(--zk-font-mono);
}
@media (max-width: 767px) {
    .footer-bottom-inner {
        flex-direction: column;
        text-align: center;
        justify-content: center;
    }
}
/* ── Responsive ── */
@media (max-width: 767px) {
    .site-header {
        height: 60px;
    }
    .brand-text {
        font-size: 16px;
    }
    .brand-logo {
        width: 30px;
        height: 30px;
        font-size: 12px;
    }
    .article-shell {
        padding: 24px 18px;
        border-radius: 14px;
    }
    .article-title {
        font-size: 1.6rem;
    }
    .article-meta {
        gap: 10px;
        font-size: 12px;
    }
    .breadcrumb-wrap {
        font-size: 12px;
        padding-top: 20px;
    }
}
@media (max-width: 576px) {
    .article-shell {
        padding: 20px 14px;
    }
    .related-thumb {
        width: 96px;
    }
    .related-body h3 {
        font-size: 14px;
    }
    .related-body p {
        font-size: 13px;
        -webkit-line-clamp: 2;
    }
}

/* roulang page: category1 */
:root {
            --zk-green: #2E4B3C;
            --zk-green-light: #3A5C4A;
            --zk-green-dark: #1F2F28;
            --zk-gold: #B8860B;
            --zk-gold-light: #D4A830;
            --zk-amber: #D9823D;
            --zk-bg: #F7F5F0;
            --zk-surface: #FFFFFF;
            --zk-dark: #24342B;
            --zk-ink: #1B2922;
            --zk-text: #202620;
            --zk-text-secondary: #5A625D;
            --zk-text-muted: #8A928D;
            --zk-border: rgba(46, 75, 60, 0.12);
            --zk-border-strong: rgba(46, 75, 60, 0.22);
            --radius-card: 14px;
            --radius-btn: 999px;
            --radius-input: 12px;
            --shadow-card: 0 2px 10px rgba(36, 52, 43, 0.06);
            --shadow-card-hover: 0 10px 24px rgba(36, 52, 43, 0.12);
            --font-sans: "Noto Sans SC", "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", sans-serif;
            --font-mono: "IBM Plex Mono", "SF Mono", "Consolas", monospace;
            --header-h: 72px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--zk-bg);
            color: var(--zk-text);
            font-size: 16px;
            line-height: 1.75;
            margin: 0;
            -webkit-font-smoothing: antialiased;
        }

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

        a:hover {
            color: var(--zk-gold);
        }

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

        button,
        input {
            font-family: inherit;
        }

        .container {
            max-width: 1200px;
        }

        .btn {
            border-radius: var(--radius-btn);
            font-weight: 600;
            padding: 12px 28px;
            transition: all .25s ease;
            border: 1px solid transparent;
        }

        .btn:focus,
        .btn:active:focus {
            box-shadow: 0 0 0 2px rgba(46, 75, 60, 0.18);
            outline: none;
        }

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

        .btn-primary:hover {
            background-color: var(--zk-gold);
            border-color: var(--zk-gold);
            color: #fff;
            transform: translateY(-1px);
        }

        .btn-primary:active {
            transform: scale(0.98);
        }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: rgba(247, 245, 240, 0.97);
            border-bottom: 1px solid var(--zk-border);
            height: var(--header-h);
            display: flex;
            align-items: center;
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--zk-green);
            border-radius: 10px;
            color: #fff;
            font-weight: 700;
            font-family: var(--font-mono);
            font-size: 14px;
            letter-spacing: -0.5px;
        }

        .brand-text {
            font-size: 18px;
            font-weight: 700;
            color: var(--zk-text);
            line-height: 1.2;
            letter-spacing: 0.5px;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            flex: 1;
            justify-content: center;
        }

        .nav-link-custom {
            display: inline-flex;
            align-items: center;
            padding: 8px 14px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 500;
            color: var(--zk-text-secondary);
            position: relative;
            transition: all .2s ease;
        }

        .nav-link-custom:hover {
            color: var(--zk-green);
            background: rgba(46, 75, 60, 0.06);
        }

        .nav-link-custom.active {
            color: var(--zk-green);
            font-weight: 600;
            background: rgba(46, 75, 60, 0.08);
        }

        .nav-link-custom.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 14px;
            right: 14px;
            height: 2px;
            border-radius: 2px;
            background: var(--zk-gold);
        }

        .dropdown-menu {
            border: 1px solid var(--zk-border);
            border-radius: 12px;
            box-shadow: 0 8px 30px rgba(36, 52, 43, 0.10);
            padding: 8px;
            margin-top: 6px;
            background: var(--zk-surface);
        }

        .dropdown-item {
            border-radius: 8px;
            padding: 10px 14px;
            font-size: 14px;
            color: var(--zk-text);
            font-weight: 500;
            transition: all .15s ease;
        }

        .dropdown-item:hover {
            background: rgba(46, 75, 60, 0.06);
            color: var(--zk-green);
        }

        .dropdown-item.active {
            background: rgba(46, 75, 60, 0.08);
            color: var(--zk-green);
            font-weight: 600;
        }

        .dropdown-item.active::before {
            content: '·';
            margin-right: 6px;
            color: var(--zk-gold);
            font-weight: 700;
        }

        .header-cta {
            flex-shrink: 0;
        }

        .header-cta .btn {
            padding: 8px 20px;
            font-size: 14px;
        }

        /* ===== Mobile Bottom Tab ===== */
        .mobile-bottom-tab {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: var(--zk-surface);
            border-top: 1px solid var(--zk-border);
            display: none;
            height: calc(64px + env(safe-area-inset-bottom));
            padding-bottom: env(safe-area-inset-bottom);
        }

        .mobile-bottom-tab .bottom-tab-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            flex: 1;
            font-size: 11px;
            color: var(--zk-text-muted);
            gap: 3px;
            transition: color .2s ease;
        }

        .mobile-bottom-tab .bottom-tab-item svg {
            width: 22px;
            height: 22px;
        }

        .mobile-bottom-tab .bottom-tab-item.active {
            color: var(--zk-green);
            font-weight: 600;
        }

        .mobile-bottom-tab .bottom-tab-item:hover {
            color: var(--zk-green);
        }

        /* ===== Category Hero ===== */
        .category-hero {
            position: relative;
            padding: 84px 0 72px;
            background: linear-gradient(120deg, rgba(247, 245, 240, 0.96) 0%, rgba(247, 245, 240, 0.88) 55%, rgba(46, 75, 60, 0.10) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            border-bottom: 1px solid var(--zk-border);
        }

        .category-hero .hero-badge {
            display: inline-block;
            padding: 5px 16px;
            border: 1px solid var(--zk-gold);
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
            color: var(--zk-gold);
            background: rgba(255, 255, 255, 0.6);
            margin-bottom: 18px;
            letter-spacing: 1px;
        }

        .category-hero h1 {
            font-size: clamp(2.4rem, 5vw, 3.4rem);
            font-weight: 700;
            line-height: 1.2;
            color: var(--zk-text);
            margin: 0 0 16px;
        }

        .category-hero .hero-sub {
            font-size: 17px;
            line-height: 1.7;
            color: var(--zk-text-secondary);
            max-width: 640px;
            margin-bottom: 32px;
        }

        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        .btn-outline-custom {
            background: transparent;
            border: 1px solid var(--zk-green);
            color: var(--zk-green);
            border-radius: var(--radius-btn);
        }

        .btn-outline-custom:hover {
            background: rgba(46, 75, 60, 0.08);
            border-color: var(--zk-gold);
            color: var(--zk-gold);
        }

        .hero-scroll {
            position: absolute;
            bottom: 24px;
            left: 50%;
            transform: translateX(-50%);
            display: flex;
            flex-direction: column;
            align-items: center;
            color: var(--zk-text-muted);
            font-size: 12px;
            gap: 4px;
            letter-spacing: 1px;
        }

        .hero-scroll .scroll-line {
            width: 24px;
            height: 36px;
            border: 1.5px solid var(--zk-text-muted);
            border-radius: 12px;
            position: relative;
        }

        .hero-scroll .scroll-line::after {
            content: '';
            position: absolute;
            top: 6px;
            left: 50%;
            width: 3px;
            height: 6px;
            border-radius: 2px;
            background: var(--zk-gold);
            transform: translateX(-50%);
            animation: scrollHint 1.8s infinite;
        }

        @keyframes scrollHint {
            0% { opacity: 1; transform: translate(-50%, 0); }
            70% { opacity: 0; transform: translate(-50%, 10px); }
            100% { opacity: 0; transform: translate(-50%, 10px); }
        }

        /* ===== Category Intro ===== */
        .category-intro {
            padding: 48px 0;
            background: var(--zk-bg);
            border-bottom: 1px solid var(--zk-border);
        }

        .category-intro .intro-text {
            font-size: 15px;
            line-height: 1.8;
            color: var(--zk-text-secondary);
            max-width: 860px;
            margin: 0 auto;
            text-align: center;
            padding: 0 16px;
        }

        .category-intro .intro-text strong {
            color: var(--zk-green);
            font-weight: 600;
        }

        /* ===== Guide Cards ===== */
        .guide-section {
            padding: 64px 0 72px;
            background: var(--zk-surface);
        }

        .guide-section .section-head {
            text-align: center;
            margin-bottom: 44px;
        }

        .guide-section .section-head h2 {
            font-size: clamp(1.6rem, 3vw, 2.1rem);
            font-weight: 700;
            color: var(--zk-text);
            margin-bottom: 10px;
        }

        .guide-section .section-head p {
            font-size: 15px;
            color: var(--zk-text-muted);
            max-width: 620px;
            margin: 0 auto;
        }

        .guide-card {
            background: var(--zk-surface);
            border: 1px solid var(--zk-border);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: box-shadow .3s ease, transform .3s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .guide-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }

        .guide-card-media {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 9;
            background: var(--zk-bg);
        }

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

        .guide-card:hover .guide-card-media img {
            transform: scale(1.04);
        }

        .guide-card-body {
            padding: 22px 22px 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .guide-tag {
            display: inline-block;
            padding: 3px 12px;
            border: 1px solid var(--zk-gold);
            color: var(--zk-gold);
            border-radius: 999px;
            font-size: 12px;
            font-weight: 500;
            letter-spacing: 0.5px;
            margin-bottom: 12px;
            align-self: flex-start;
            background: rgba(184, 134, 11, 0.05);
        }

        .guide-card-body h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--zk-text);
            margin: 0 0 10px;
            line-height: 1.4;
        }

        .guide-card-body p {
            font-size: 14px;
            color: var(--zk-text-secondary);
            line-height: 1.7;
            margin: 0;
            flex: 1;
        }

        /* ===== Audience Section ===== */
        .audience-section {
            padding: 64px 0;
            background: var(--zk-dark);
            color: #f0efe9;
        }

        .audience-section .section-head {
            text-align: center;
            margin-bottom: 44px;
        }

        .audience-section .section-head h2 {
            font-size: clamp(1.5rem, 3vw, 2rem);
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }

        .audience-section .section-head p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.60);
            max-width: 600px;
            margin: 0 auto;
        }

        .audience-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .audience-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-card);
            padding: 26px 22px;
            text-align: center;
            transition: all .3s ease;
        }

        .audience-card:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(184, 134, 11, 0.4);
            transform: translateY(-2px);
        }

        .audience-card .audience-icon {
            width: 52px;
            height: 52px;
            margin: 0 auto 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(184, 134, 11, 0.15);
            border-radius: 50%;
            color: var(--zk-gold-light);
        }

        .audience-card h3 {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin: 0 0 8px;
        }

        .audience-card p {
            font-size: 13px;
            line-height: 1.6;
            color: rgba(255, 255, 255, 0.55);
            margin: 0;
        }

        /* ===== Steps Section ===== */
        .steps-section {
            padding: 64px 0;
            background: var(--zk-bg);
            border-bottom: 1px solid var(--zk-border);
        }

        .steps-section .section-head {
            text-align: center;
            margin-bottom: 48px;
        }

        .steps-section .section-head h2 {
            font-size: clamp(1.5rem, 3vw, 2rem);
            font-weight: 700;
            color: var(--zk-text);
            margin-bottom: 10px;
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .step-card {
            position: relative;
            background: var(--zk-surface);
            border: 1px solid var(--zk-border);
            border-radius: var(--radius-card);
            padding: 28px 22px 24px;
            box-shadow: var(--shadow-card);
            text-align: center;
        }

        .step-num {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: var(--zk-green);
            color: #fff;
            font-family: var(--font-mono);
            font-size: 16px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
        }

        .step-card h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--zk-text);
            margin-bottom: 8px;
        }

        .step-card p {
            font-size: 13px;
            color: var(--zk-text-secondary);
            line-height: 1.6;
            margin: 0;
        }

        .step-card::after {
            content: '→';
            position: absolute;
            top: 50%;
            right: -18px;
            transform: translateY(-50%);
            color: var(--zk-gold);
            font-size: 20px;
            z-index: 2;
        }

        .step-card:last-child::after {
            display: none;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 64px 0;
            background: var(--zk-surface);
        }

        .faq-section .section-head {
            text-align: center;
            margin-bottom: 40px;
        }

        .faq-section .section-head h2 {
            font-size: clamp(1.5rem, 3vw, 2rem);
            font-weight: 700;
            color: var(--zk-text);
        }

        .accordion-custom {
            max-width: 760px;
            margin: 0 auto;
        }

        .accordion-custom .accordion-item {
            border: 1px solid var(--zk-border);
            border-radius: 12px;
            margin-bottom: 10px;
            overflow: hidden;
            box-shadow: var(--shadow-card);
            background: var(--zk-surface);
        }

        .accordion-custom .accordion-button {
            background: var(--zk-surface);
            color: var(--zk-text);
            font-weight: 600;
            font-size: 15px;
            padding: 18px 22px;
            box-shadow: none;
            border: none;
            transition: background .2s ease;
        }

        .accordion-custom .accordion-button:not(.collapsed) {
            background: rgba(46, 75, 60, 0.04);
            color: var(--zk-green);
        }

        .accordion-custom .accordion-button:focus {
            box-shadow: 0 0 0 2px rgba(46, 75, 60, 0.15);
            border-radius: 12px;
        }

        .accordion-custom .accordion-button::after {
            content: '+';
            background-image: none;
            font-size: 22px;
            font-weight: 300;
            color: var(--zk-green);
            width: auto;
            height: auto;
            line-height: 1;
        }

        .accordion-custom .accordion-button:not(.collapsed)::after {
            content: '−';
        }

        .accordion-custom .accordion-body {
            padding: 0 22px 20px;
            font-size: 14px;
            color: var(--zk-text-secondary);
            line-height: 1.75;
            border-top: 1px solid var(--zk-border);
            background: rgba(247, 245, 240, 0.3);
        }

        .accordion-custom .accordion-body {
            padding-top: 16px;
        }

        /* ===== CTA ===== */
        .category-cta {
            padding: 72px 0;
            background: var(--zk-ink);
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .category-cta::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -80px;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            background: rgba(184, 134, 11, 0.12);
        }

        .category-cta .cta-inner {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            gap: 14px;
            position: relative;
            z-index: 1;
        }

        .category-cta h2 {
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            font-weight: 700;
            color: #fff;
            margin: 0;
        }

        .category-cta p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.70);
            max-width: 560px;
            margin: 0 auto;
        }

        .cta-buttons {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            justify-content: center;
            margin-top: 10px;
        }

        .btn-light-download {
            background: #fff;
            color: var(--zk-green);
            border: 1px solid #fff;
            border-radius: var(--radius-btn);
            padding: 12px 28px;
            font-weight: 600;
            transition: all .25s ease;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-light-download:hover {
            background: var(--zk-gold);
            border-color: var(--zk-gold);
            color: #fff;
            transform: translateY(-1px);
        }

        .btn-outline-light {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.4);
            color: #fff;
            border-radius: var(--radius-btn);
            padding: 12px 28px;
            font-weight: 600;
            transition: all .25s ease;
        }

        .btn-outline-light:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--zk-ink);
            color: rgba(255, 255, 255, 0.75);
            font-size: 14px;
        }

        .footer-main {
            padding: 52px 0 32px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.1fr;
            gap: 40px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }

        .footer-brand-logo {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            background: var(--zk-gold);
            border-radius: 8px;
            color: var(--zk-ink);
            font-family: var(--font-mono);
            font-size: 13px;
            font-weight: 700;
        }

        .footer-desc {
            font-size: 13px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.55);
            margin-bottom: 16px;
        }

        .social-links {
            display: flex;
            gap: 10px;
        }

        .social-link {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            color: rgba(255, 255, 255, 0.70);
            transition: all .25s ease;
        }

        .social-link:hover {
            background: var(--zk-gold);
            color: #fff;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 14px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-col ul li {
            margin-bottom: 8px;
        }

        .footer-col ul a {
            color: rgba(255, 255, 255, 0.55);
            font-size: 13px;
            transition: color .2s ease;
        }

        .footer-col ul a:hover {
            color: var(--zk-gold-light);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.07);
            padding: 18px 0;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.40);
        }

        .footer-bottom .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }

        /* ===== Responsive ===== */
        @media (max-width: 991px) {
            .audience-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }

            .step-card::after {
                display: none;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
        }

        @media (max-width: 767px) {
            .site-header {
                height: 60px;
            }

            .main-nav {
                display: none;
            }

            .header-cta .btn {
                font-size: 13px;
                padding: 6px 14px;
            }

            .mobile-bottom-tab {
                display: flex;
            }

            body {
                padding-bottom: calc(64px + env(safe-area-inset-bottom));
            }

            .brand-text {
                font-size: 16px;
            }

            .category-hero {
                padding: 64px 0 56px;
            }

            .category-hero h1 {
                font-size: 2rem;
            }

            .category-hero .hero-sub {
                font-size: 15px;
            }

            .hero-actions .btn {
                padding: 10px 20px;
                font-size: 14px;
            }

            .category-intro {
                padding: 32px 0;
            }

            .guide-section {
                padding: 48px 0;
            }

            .audience-section {
                padding: 48px 0;
            }

            .audience-grid {
                grid-template-columns: 1fr;
            }

            .steps-section {
                padding: 48px 0;
            }

            .steps-grid {
                grid-template-columns: 1fr;
            }

            .faq-section {
                padding: 48px 0;
            }

            .category-cta {
                padding: 48px 0;
            }

            .cta-buttons .btn {
                padding: 10px 20px;
                font-size: 14px;
            }

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

            .footer-main {
                padding: 40px 0 24px;
            }

            .footer-bottom .container {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 575px) {
            .brand-logo {
                width: 30px;
                height: 30px;
                font-size: 12px;
                border-radius: 8px;
            }

            .brand-text {
                font-size: 15px;
            }

            .header-cta .btn {
                display: none;
            }

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

            .category-hero .hero-badge {
                font-size: 12px;
                padding: 4px 12px;
            }

            .hero-scroll {
                display: none;
            }

            .audience-grid,
            .steps-grid {
                grid-template-columns: 1fr;
            }

            .guide-card-body {
                padding: 18px;
            }

            .guide-card-body h3 {
                font-size: 16px;
            }
        }

/* roulang page: category2 */
/* ============ 设计变量 ============ */
        :root {
            --zk-green: #2E4B3C;
            --zk-gold: #B8860B;
            --zk-amber: #D9823D;
            --zk-bg: #F7F5F0;
            --zk-surface: #FFFFFF;
            --zk-dark: #24342B;
            --zk-ink: #1B2922;
            --zk-text: #202620;
            --zk-muted: #5A625D;
            --zk-faint: #8A928D;
            --zk-border: rgba(46, 75, 60, 0.12);
            --radius-card: 14px;
            --radius-btn: 999px;
            --radius-input: 12px;
            --shadow-card: 0 2px 10px rgba(36, 52, 43, 0.06);
            --shadow-hover: 0 10px 24px rgba(36, 52, 43, 0.12);
            --font-sans: 'Noto Sans SC', 'PingFang SC', 'HarmonyOS Sans SC', 'Microsoft YaHei', sans-serif;
            --font-mono: 'IBM Plex Mono', 'SF Mono', 'Consolas', monospace;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background: var(--zk-bg);
            color: var(--zk-text);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: all 0.25s ease;
        }
        a:hover {
            color: var(--zk-gold);
        }
        img {
            max-width: 100%;
            height: auto;
        }
        button,
        input {
            font-family: inherit;
        }
        .container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* ============ 顶部导航 ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: var(--zk-bg);
            border-bottom: 1px solid var(--zk-border);
            height: 72px;
            display: flex;
            align-items: center;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .brand-logo {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: var(--zk-green);
            color: #fff;
            border-radius: 10px;
            font-weight: 700;
            font-size: 15px;
            letter-spacing: 1px;
            font-family: var(--font-mono);
        }
        .brand-text {
            font-size: 19px;
            font-weight: 700;
            color: var(--zk-text);
            letter-spacing: 0.5px;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .nav-link-custom {
            display: inline-block;
            padding: 8px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--zk-text);
            border-radius: var(--radius-btn);
            border: 1px solid transparent;
            position: relative;
        }
        .nav-link-custom:hover {
            color: var(--zk-green);
            background: rgba(46, 75, 60, 0.05);
        }
        .nav-link-custom.active {
            color: var(--zk-green);
            font-weight: 600;
        }
        .nav-link-custom.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 3px;
            background: var(--zk-gold);
        }
        .dropdown-menu {
            border-radius: var(--radius-card);
            border: 1px solid var(--zk-border);
            box-shadow: var(--shadow-hover);
            padding: 8px;
            min-width: 180px;
        }
        .dropdown-item {
            border-radius: 10px;
            padding: 10px 14px;
            font-size: 14px;
            color: var(--zk-text);
            transition: background 0.2s;
        }
        .dropdown-item:hover {
            background: rgba(46, 75, 60, 0.06);
            color: var(--zk-green);
        }
        .dropdown-item.active {
            background: rgba(46, 75, 60, 0.08);
            color: var(--zk-green);
            font-weight: 600;
        }
        .header-cta {
            flex-shrink: 0;
        }
        .header-cta .btn {
            font-size: 14px;
            padding: 10px 22px;
        }

        /* ============ 按钮 ============ */
        .btn {
            border-radius: var(--radius-btn);
            font-weight: 600;
            transition: all 0.25s ease;
            border: 1px solid transparent;
            font-size: 15px;
            padding: 12px 28px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
        }
        .btn-primary {
            background: var(--zk-green);
            color: #fff;
            border-color: var(--zk-green);
        }
        .btn-primary:hover {
            background: var(--zk-gold);
            border-color: var(--zk-gold);
            color: #fff;
            transform: translateY(-1px);
        }
        .btn-outline {
            background: transparent;
            color: var(--zk-green);
            border-color: var(--zk-green);
        }
        .btn-outline:hover {
            background: rgba(46, 75, 60, 0.08);
            color: var(--zk-green);
        }
        .btn:active {
            transform: scale(0.98);
        }

        /* ============ Hero ============ */
        .category-hero {
            position: relative;
            background:
                linear-gradient(to bottom, rgba(247, 245, 240, 0.92), rgba(247, 245, 240, 0.88)),
                url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            padding: 96px 0 80px;
            text-align: center;
        }
        .hero-badge {
            display: inline-block;
            padding: 6px 18px;
            border: 1px solid var(--zk-gold);
            color: var(--zk-gold);
            border-radius: var(--radius-btn);
            font-size: 13px;
            letter-spacing: 1px;
            font-weight: 600;
            margin-bottom: 24px;
        }
        .category-hero h1 {
            font-size: clamp(2.4rem, 5vw, 3.5rem);
            font-weight: 700;
            line-height: 1.2;
            color: var(--zk-text);
            margin-bottom: 16px;
        }
        .hero-sub {
            font-size: 17px;
            color: var(--zk-muted);
            max-width: 620px;
            margin: 0 auto 32px;
            line-height: 1.6;
        }
        .hero-actions {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .hero-scroll {
            margin-top: 48px;
            color: var(--zk-faint);
            font-size: 13px;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 6px;
        }
        .scroll-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--zk-gold);
            display: inline-block;
            animation: scrollPulse 2s infinite;
        }
        @keyframes scrollPulse {
            0%,
            100% {
                opacity: 1;
                transform: translateY(0);
            }
            50% {
                opacity: 0.5;
                transform: translateY(4px);
            }
        }

        /* ============ 分类说明 ============ */
        .category-intro {
            padding: 40px 0 20px;
        }
        .category-intro .row {
            justify-content: center;
        }
        .category-intro p {
            font-size: 15px;
            color: var(--zk-muted);
            line-height: 1.8;
            max-width: 820px;
            margin: 0 auto;
            text-align: center;
        }

        /* ============ 通用区块标题 ============ */
        .section-title {
            font-size: clamp(1.5rem, 3vw, 2.1rem);
            font-weight: 700;
            line-height: 1.3;
            text-align: center;
            margin-bottom: 12px;
            color: var(--zk-text);
        }
        .section-subtitle {
            font-size: 15px;
            color: var(--zk-muted);
            text-align: center;
            max-width: 640px;
            margin: 0 auto 40px;
        }

        /* ============ 卖点 ============ */
        .features-block {
            background: var(--zk-bg);
            padding: 80px 0;
        }
        .feature-card {
            background: var(--zk-surface);
            border: 1px solid var(--zk-border);
            border-radius: var(--radius-card);
            padding: 32px 28px;
            box-shadow: var(--shadow-card);
            height: 100%;
            transition: box-shadow 0.3s ease, transform 0.3s ease;
        }
        .feature-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .feature-card .icon-wrap {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(46, 75, 60, 0.08);
            margin-bottom: 20px;
            transition: all 0.3s ease;
        }
        .feature-card:hover .icon-wrap {
            background: rgba(184, 134, 11, 0.12);
        }
        .feature-card:hover .icon-wrap svg {
            stroke: var(--zk-gold);
            fill: var(--zk-gold);
        }
        .feature-card h3 {
            font-size: 19px;
            font-weight: 600;
            margin-bottom: 10px;
            color: var(--zk-text);
        }
        .feature-card p {
            font-size: 14px;
            color: var(--zk-muted);
            line-height: 1.65;
            margin-bottom: 0;
        }

        /* ============ 适用场景 ============ */
        .scenarios-block {
            background: var(--zk-surface);
            padding: 80px 0;
        }
        .scenario-item {
            text-align: center;
            padding: 32px 18px;
            border-radius: var(--radius-card);
            transition: background 0.3s;
        }
        .scenario-item:hover {
            background: rgba(46, 75, 60, 0.03);
        }
        .scenario-icon {
            width: 56px;
            height: 56px;
            margin: 0 auto 18px;
            border-radius: 50%;
            border: 2px solid rgba(46, 75, 60, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--zk-green);
        }
        .scenario-item h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .scenario-item p {
            font-size: 14px;
            color: var(--zk-muted);
            line-height: 1.6;
            margin-bottom: 0;
        }

        /* ============ 下载流程 ============ */
        .steps-block {
            background: var(--zk-bg);
            padding: 80px 0;
        }
        .step-item {
            position: relative;
            text-align: center;
            padding: 0 16px;
        }
        .step-number {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--zk-green);
            color: #fff;
            font-family: var(--font-mono);
            font-size: 18px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            box-shadow: 0 4px 12px rgba(46, 75, 60, 0.25);
            position: relative;
            z-index: 2;
        }
        .step-item h3 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .step-item p {
            font-size: 13px;
            color: var(--zk-muted);
            line-height: 1.6;
            margin-bottom: 0;
        }
        .step-item::after {
            content: '';
            position: absolute;
            top: 26px;
            left: 50%;
            width: 100%;
            height: 2px;
            background: rgba(46, 75, 60, 0.15);
            z-index: 1;
        }
        .step-item:last-child::after {
            display: none;
        }
        @media (max-width: 767px) {
            .step-item::after {
                display: none;
            }
            .step-item {
                margin-bottom: 32px;
            }
        }

        /* ============ 教程卡片 ============ */
        .tutorials-block {
            background: var(--zk-surface);
            padding: 80px 0;
        }
        .tutorial-card {
            background: var(--zk-surface);
            border: 1px solid var(--zk-border);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            height: 100%;
            display: flex;
            flex-direction: column;
            transition: box-shadow 0.3s ease, transform 0.3s ease;
        }
        .tutorial-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .tutorial-card .thumb {
            position: relative;
            aspect-ratio: 16/9;
            overflow: hidden;
        }
        .tutorial-card .thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .tutorial-card:hover .thumb img {
            transform: scale(1.04);
        }
        .tutorial-card .card-body {
            padding: 20px 22px 24px;
            display: flex;
            flex-direction: column;
            flex: 1 1 auto;
        }
        .card-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 10px;
        }
        .card-meta .tag {
            font-size: 12px;
            color: var(--zk-gold);
            border: 1px solid rgba(184, 134, 11, 0.4);
            border-radius: var(--radius-btn);
            padding: 2px 10px;
            font-weight: 500;
            white-space: nowrap;
        }
        .card-meta .date {
            font-family: var(--font-mono);
            font-size: 12px;
            color: var(--zk-faint);
        }
        .tutorial-card h3 {
            font-size: 17px;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 8px;
            color: var(--zk-text);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .tutorial-card p {
            font-size: 14px;
            color: var(--zk-muted);
            line-height: 1.6;
            margin-bottom: 14px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .tutorial-card .read-more {
            font-size: 13px;
            font-weight: 600;
            color: var(--zk-green);
            margin-top: auto;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .tutorial-card .read-more:hover {
            color: var(--zk-gold);
        }

        /* ============ FAQ ============ */
        .faq-block {
            background: var(--zk-bg);
            padding: 80px 0;
        }
        .accordion-item {
            border: 1px solid var(--zk-border);
            border-radius: var(--radius-card) !important;
            margin-bottom: 12px;
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }
        .accordion-button {
            font-size: 15px;
            font-weight: 600;
            color: var(--zk-text);
            padding: 18px 22px;
            background: var(--zk-surface);
            box-shadow: none;
            border: none;
        }
        .accordion-button:not(.collapsed) {
            color: var(--zk-green);
            background: rgba(46, 75, 60, 0.04);
            box-shadow: none;
        }
        .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(46, 75, 60, 0.12);
            border-radius: var(--radius-card);
        }
        .accordion-button::after {
            background-image: none;
            content: '+';
            font-size: 22px;
            font-weight: 400;
            color: var(--zk-green);
            width: auto;
            height: auto;
            line-height: 1;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: transform 0.3s ease;
        }
        .accordion-button:not(.collapsed)::after {
            content: '−';
            transform: rotate(0deg);
        }
        .accordion-body {
            font-size: 14px;
            color: var(--zk-muted);
            line-height: 1.75;
            padding: 16px 22px 20px;
            border-top: 1px solid rgba(46, 75, 60, 0.05);
        }

        /* ============ CTA 下载 ============ */
        .download-cta {
            background: var(--zk-dark);
            padding: 80px 0 96px;
            text-align: center;
        }
        .download-cta .section-title {
            color: #F7F5F0;
        }
        .download-cta .section-subtitle {
            color: rgba(247, 245, 240, 0.7);
        }
        .platform-buttons {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
            margin-bottom: 40px;
        }
        .platform-btn {
            width: 230px;
            padding: 20px 24px;
            background: #fff;
            border-radius: var(--radius-card);
            display: flex;
            align-items: center;
            gap: 14px;
            text-align: left;
            color: var(--zk-text);
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
            border: 2px solid transparent;
            transition: all 0.3s ease;
        }
        .platform-btn:hover {
            background: var(--zk-gold);
            border-color: var(--zk-gold);
            color: #fff;
            transform: translateY(-3px);
        }
        .platform-btn .p-icon {
            flex-shrink: 0;
            width: 32px;
            height: 32px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .platform-btn .p-text {
            display: flex;
            flex-direction: column;
        }
        .platform-btn .p-name {
            font-size: 16px;
            font-weight: 600;
            line-height: 1.3;
        }
        .platform-btn .p-meta {
            font-size: 12px;
            opacity: 0.7;
            font-family: var(--font-mono);
            line-height: 1.4;
        }
        .qr-wrap {
            display: inline-flex;
            flex-direction: column;
            align-items: center;
            gap: 10px;
            background: #fff;
            border-radius: var(--radius-card);
            padding: 16px;
            width: 140px;
            margin: 0 auto;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
        }
        .qr-placeholder {
            width: 96px;
            height: 96px;
            background: repeating-conic-gradient(var(--zk-ink) 0% 25%, #fff 0% 50%) 50% / 12px 12px;
            border-radius: 8px;
        }
        .qr-wrap span {
            font-size: 12px;
            color: var(--zk-muted);
            font-weight: 500;
        }
        .version-note {
            font-size: 12px;
            color: rgba(247, 245, 240, 0.55);
            font-family: var(--font-mono);
            margin-top: 24px;
        }

        /* ============ 返回首页 ============ */
        .back-home {
            text-align: center;
            padding: 40px 0;
            background: var(--zk-dark);
        }
        .back-home a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: rgba(247, 245, 240, 0.7);
            font-size: 14px;
            font-weight: 500;
            padding: 10px 24px;
            border: 1px solid rgba(247, 245, 240, 0.3);
            border-radius: var(--radius-btn);
            transition: all 0.3s;
        }
        .back-home a:hover {
            color: #fff;
            border-color: var(--zk-gold);
            background: rgba(184, 134, 11, 0.1);
        }

        /* ============ 页脚 ============ */
        .site-footer {
            background: var(--zk-ink);
            color: rgba(247, 245, 240, 0.75);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }
        .footer-brand-logo {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--zk-gold);
            color: #fff;
            border-radius: 9px;
            font-family: var(--font-mono);
            font-weight: 700;
            font-size: 14px;
        }
        .footer-desc {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(247, 245, 240, 0.6);
            margin-bottom: 20px;
            max-width: 280px;
        }
        .social-links {
            display: flex;
            gap: 10px;
        }
        .social-link {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            border: 1px solid rgba(247, 245, 240, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(247, 245, 240, 0.7);
            transition: all 0.3s;
        }
        .social-link:hover {
            background: var(--zk-gold);
            border-color: var(--zk-gold);
            color: #fff;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 18px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col li {
            margin-bottom: 10px;
        }
        .footer-col a {
            color: rgba(247, 245, 240, 0.65);
            font-size: 14px;
            transition: color 0.2s;
        }
        .footer-col a:hover {
            color: var(--zk-gold);
        }
        .footer-bottom {
            border-top: 1px solid rgba(247, 245, 240, 0.1);
            padding: 20px 0;
            text-align: center;
            font-size: 13px;
            color: rgba(247, 245, 240, 0.4);
        }
        .footer-bottom .container {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }

        /* ============ 移动端底部 Tab ============ */
        .mobile-bottom-nav {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            height: calc(64px + env(safe-area-inset-bottom));
            padding-bottom: env(safe-area-inset-bottom);
            background: var(--zk-surface);
            border-top: 1px solid var(--zk-border);
            z-index: 1090;
            grid-template-columns: repeat(5, 1fr);
            box-shadow: 0 -2px 16px rgba(0, 0, 0, 0.06);
        }
        .bottom-nav-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 3px;
            font-size: 12px;
            color: var(--zk-faint);
            transition: color 0.2s;
        }
        .bottom-nav-item svg {
            width: 22px;
            height: 22px;
            stroke: currentColor;
            fill: none;
            stroke-width: 1.8;
        }
        .bottom-nav-item.active {
            color: var(--zk-green);
            font-weight: 600;
        }

        /* ============ 响应式 ============ */
        @media (max-width: 991.98px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 767.98px) {
            body {
                padding-bottom: calc(64px + env(safe-area-inset-bottom));
            }
            .site-header {
                height: 64px;
            }
            .main-nav,
            .header-cta .btn span {
                display: none;
            }
            .header-cta .btn {
                font-size: 13px;
                padding: 10px 18px;
            }
            .brand-text {
                font-size: 17px;
            }
            .brand-logo {
                width: 34px;
                height: 34px;
                font-size: 13px;
            }
            .category-hero {
                padding: 72px 0 56px;
            }
            .category-hero h1 {
                font-size: 2rem;
            }
            .hero-sub {
                font-size: 15px;
                padding: 0 16px;
            }
            .mobile-bottom-nav {
                display: grid;
            }
            .features-block,
            .scenarios-block,
            .steps-block,
            .tutorials-block,
            .faq-block,
            .download-cta {
                padding: 56px 0;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .platform-btn {
                width: 100%;
                max-width: 280px;
            }
            .step-item::after {
                display: none;
            }
            .section-title {
                font-size: 1.5rem;
            }
        }

        @media (max-width: 575.98px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-desc {
                max-width: none;
            }
            .category-intro p {
                font-size: 14px;
                text-align: left;
                padding: 0 4px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .hero-actions .btn {
                width: 80%;
            }
        }

        @media (max-width: 768px) {
            .step-item {
                padding: 0 8px;
                margin-bottom: 24px;
            }
        }
        @media (min-width: 768px) and (max-width: 991px) {
            .step-item::after {
                top: 26px;
            }
        }
        @media (min-width: 992px) {
            .step-item::after {
                top: 26px;
            }
        }