/* roulang page: index */
:root {
  --primary: #14F1D9;
  --primary-gradient: linear-gradient(120deg, #14F1D9 0%, #3D7EFF 50%, #F5A623 100%);
  --secondary: #F5A623;
  --secondary-gradient: linear-gradient(135deg, #F5A623, #FF6B35);
  --bg-dark: #0B1120;
  --bg-card: #151E2E;
  --bg-elevated: #1E293B;
  --text-primary: #F1F5F9;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --border: rgba(148,163,184,0.14);
  --radius-lg: 24px;
  --shadow-card: 0 8px 30px rgba(0,0,0,0.25);
  --shadow-hover: 0 20px 50px rgba(0,0,0,0.4);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { background: var(--bg-dark); color: var(--text-primary); font-family: 'PingFang SC','Microsoft YaHei','Noto Sans SC',sans-serif; line-height: 1.75; overflow-x: hidden; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
::selection { background: rgba(20,241,217,0.3); color: #0B1120; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.nav-header { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; background: rgba(11,17,32,0.85); backdrop-filter: blur(24px); border-bottom: 1px solid var(--border); height: 72px; }
.nav-wrap { max-width: 1280px; margin: 0 auto; height: 72px; padding: 0 32px; display: flex; align-items: center; justify-content: space-between; gap: 32px; }
.logo-area { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.logo-icon { width: 36px; height: 36px; border-radius: 10px; background: var(--primary-gradient); display: flex; align-items: center; justify-content: center; color: #0B1120; font-weight: 900; font-size: 20px; }
.logo-text { font-size: 20px; font-weight: 800; color: #fff; white-space: nowrap; }
.nav-links { display: flex; align-items: center; gap: 36px; list-style: none; }
.nav-links a { font-size: 15px; color: var(--text-secondary); font-weight: 500; transition: color .3s, opacity .3s; position: relative; padding: 6px 0; }
.nav-links a:hover { color: #fff; }
.nav-links a.active { color: #fff; font-weight: 600; }
.nav-links a.active::after { content: ''; position: absolute; bottom: 0; left: 0; width: 100%; height: 2px; border-radius: 2px; background: var(--primary-gradient); }
.nav-cta { display: flex; align-items: center; gap: 14px; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: 44px; padding: 0 28px; border-radius: 12px; font-weight: 700; font-size: 15px; transition: all .3s ease; border: none; white-space: nowrap; }
.btn:active { transform: scale(0.97); }
.btn:focus-visible { outline: 2px solid rgba(255,255,255,0.3); outline-offset: 2px; }
.btn-primary { background: linear-gradient(120deg, #14F1D9, #3D7EFF); color: #0B1120; }
.btn-primary:hover { box-shadow: 0 0 30px rgba(20,241,217,0.35); filter: brightness(1.1); }
.btn-outline { background: transparent; border: 1.5px solid var(--primary); color: var(--primary); }
.btn-outline:hover { background: rgba(20,241,217,0.1); }
.btn-ghost { background: transparent; border: 1.5px solid rgba(255,255,255,0.3); color: #fff; }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); background: rgba(20,241,217,0.08); }
.btn-dark { background: #0B1120; color: #fff; }
.btn-dark:hover { transform: scale(1.02); box-shadow: 0 10px 30px rgba(0,0,0,0.4); }
.btn-lg { height: 56px; padding: 0 40px; font-size: 18px; border-radius: 14px; }
.badge-pill { display: inline-flex; align-items: center; gap: 6px; background: rgba(20,241,217,0.12); border: 1px solid rgba(20,241,217,0.3); border-radius: 999px; padding: 6px 16px; font-size: 13px; color: var(--text-secondary); }
.badge-pill .num { color: var(--primary); font-weight: 800; font-size: 16px; }
.hero-section { position: relative; min-height: 100vh; display: flex; align-items: center; background: url('/assets/images/backpic/back-1.png') center/cover no-repeat; background-attachment: fixed; }
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(11,17,32,0.95) 0%, rgba(11,17,32,0.75) 50%, rgba(11,17,32,0.4) 100%); }
.hero-content { position: relative; z-index: 10; max-width: 1280px; margin: 0 auto; padding: 120px 32px 80px; display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 80px; align-items: center; }
.hero-left { padding-right: 20px; }
.hero-title { font-size: 56px; font-weight: 800; line-height: 1.2; letter-spacing: -0.02em; margin: 24px 0; color: #fff; }
.hero-title .gradient-text { background: var(--primary-gradient); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.hero-subtitle { font-size: 18px; color: var(--text-secondary); margin-bottom: 36px; max-width: 480px; line-height: 1.8; }
.hero-cta { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 48px; }
.hero-stats { display: flex; gap: 32px; flex-wrap: wrap; }
.stat-badge { display: inline-flex; flex-direction: column; background: rgba(11,17,32,0.6); border: 1px solid var(--border); border-radius: 16px; padding: 12px 22px; backdrop-filter: blur(12px); }
.stat-badge .value { font-size: 22px; font-weight: 800; color: var(--primary); }
.stat-badge .label { font-size: 12px; color: var(--text-secondary); margin-top: 2px; }
.hero-right { position: relative; }
.hero-card { border-radius: 24px; overflow: hidden; border: 2px solid rgba(20,241,217,0.3); box-shadow: 0 0 60px rgba(20,241,217,0.15), 0 20px 60px rgba(0,0,0,0.5); position: relative; }
.hero-card img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
.hero-card-overlay { position: absolute; inset: 0; background: linear-gradient(to top, rgba(11,17,32,0.9), transparent 60%); }
.hero-card-content { position: absolute; bottom: 20px; left: 20px; right: 20px; }
.hero-card-tag { position: absolute; top: 16px; right: 16px; background: var(--secondary-gradient); color: #0B1120; font-weight: 700; font-size: 13px; padding: 6px 14px; border-radius: 999px; box-shadow: 0 4px 16px rgba(245,166,35,0.4); }
.hero-card-title { font-weight: 700; font-size: 20px; color: #fff; }
.hero-card-desc { font-size: 13px; color: var(--text-secondary); line-height: 1.6; }
/* Section */
.section { padding: 96px 0; }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; margin-bottom: 48px; gap: 24px; }
.section-title { font-size: 36px; font-weight: 800; line-height: 1.3; }
.section-subtitle { color: var(--text-secondary); margin-top: 8px; font-size: 15px; }
.section-link { color: var(--primary); font-weight: 600; font-size: 15px; display: inline-flex; align-items: center; gap: 8px; transition: gap .3s; white-space: nowrap; }
.section-link:hover { gap: 12px; }
/* Feature cards */
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.feature-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 28px; transition: all .3s ease; box-shadow: var(--shadow-card); }
.feature-card:nth-child(2), .feature-card:nth-child(4) { transform: translateY(24px); }
.feature-card:hover { transform: translateY(-6px); border-color: rgba(20,241,217,0.4); box-shadow: var(--shadow-hover); }
.feature-card:nth-child(2):hover, .feature-card:nth-child(4):hover { transform: translateY(18px); }
.feature-icon { width: 48px; height: 48px; border-radius: 16px; background: rgba(20,241,217,0.12); border: 1px solid rgba(20,241,217,0.3); display: flex; align-items: center; justify-content: center; font-size: 22px; margin-bottom: 20px; }
.feature-name { font-size: 18px; font-weight: 700; margin-bottom: 10px; color: #fff; }
.feature-desc { color: var(--text-secondary); font-size: 14px; line-height: 1.7; margin-bottom: 18px; }
.feature-link { color: var(--primary); font-size: 14px; font-weight: 600; display: inline-flex; align-items: center; gap: 6px; }
.feature-link:hover { gap: 10px; }
/* Scenario */
.scenario-wrap { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: 60px; align-items: center; }
.scenario-image { position: relative; border-radius: 24px; overflow: hidden; }
.scenario-image img { width: 100%; aspect-ratio: 4/5; object-fit: cover; border-radius: 24px; }
.scenario-float { position: absolute; bottom: 24px; left: 24px; background: rgba(11,17,32,0.85); backdrop-filter: blur(16px); border: 1px solid var(--border); border-radius: 16px; padding: 16px 20px; display: flex; align-items: center; gap: 14px; }
.scenario-float .num { font-size: 28px; font-weight: 800; color: var(--secondary); }
.scenario-float .txt { font-size: 13px; color: var(--text-secondary); line-height: 1.4; }
.scenario-list { display: flex; flex-direction: column; }
.scenario-item { display: flex; gap: 24px; padding: 28px 16px; border-bottom: 1px solid var(--border); transition: background .3s, padding-left .3s; border-radius: 16px; }
.scenario-item:first-child { padding-top: 8px; }
.scenario-item:hover { background: var(--bg-elevated); padding-left: 24px; }
.scenario-index { font-size: 28px; font-weight: 800; color: var(--secondary); line-height: 1.2; min-width: 48px; }
.scenario-name { font-size: 18px; font-weight: 700; color: #fff; margin-bottom: 8px; }
.scenario-desc { font-size: 14px; color: var(--text-secondary); line-height: 1.75; max-width: 480px; }
/* News */
.news-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; }
.news-main { border-radius: 24px; overflow: hidden; border: 1px solid var(--border); background: var(--bg-elevated); transition: all .3s; cursor: pointer; position: relative; }
.news-main:hover { transform: translateY(-4px); border-color: rgba(20,241,217,0.4); box-shadow: var(--shadow-hover); }
.news-main-img { position: relative; overflow: hidden; }
.news-main-img img { width: 100%; aspect-ratio: 16/9; object-fit: cover; transition: transform .5s ease; }
.news-main:hover .news-main-img img { transform: scale(1.05); }
.news-main-img::after { content: ''; position: absolute; inset: 0; background: linear-gradient(to top, rgba(11,17,32,0.8), transparent 60%); }
.news-main-body { padding: 24px 28px; }
.news-main-title { font-size: 22px; font-weight: 700; color: #fff; margin-bottom: 10px; line-height: 1.4; }
.news-main-desc { color: var(--text-secondary); font-size: 14px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 14px; }
.news-meta { display: flex; align-items: center; gap: 14px; color: var(--text-muted); font-size: 13px; flex-wrap: wrap; }
.news-list { display: flex; flex-direction: column; gap: 0; }
.news-list-item { padding: 16px 12px; border-bottom: 1px solid var(--border); transition: all .3s; border-radius: 12px; cursor: pointer; }
.news-list-item:last-child { border-bottom: none; }
.news-list-item:hover { background: var(--bg-elevated); padding-left: 20px; }
.news-list-title { font-size: 16px; font-weight: 600; color: #fff; margin-bottom: 6px; display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden; }
.news-list-desc { font-size: 14px; color: var(--text-secondary); display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 8px; }
.news-empty { border: 2px dashed var(--border); border-radius: 24px; padding: 60px 40px; text-align: center; color: var(--text-secondary); grid-column: 1 / -1; }
/* Reviews */
.reviews-section { background: var(--bg-elevated); }
.reviews-scroll { display: flex; gap: 24px; overflow-x: auto; padding: 12px 4px 24px; scroll-snap-type: x mandatory; scrollbar-width: thin; scrollbar-color: var(--bg-elevated) transparent; }
.reviews-scroll::-webkit-scrollbar { height: 6px; }
.reviews-scroll::-webkit-scrollbar-track { background: transparent; }
.reviews-scroll::-webkit-scrollbar-thumb { background: var(--bg-elevated); border-radius: 6px; }
.review-card { min-width: 320px; max-width: 320px; background: var(--bg-card); border-radius: var(--radius-lg); padding: 28px; border: 1px solid var(--border); scroll-snap-align: start; transition: all .3s; }
.review-card:hover { border-color: rgba(20,241,217,0.3); transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.review-user { display: flex; align-items: center; gap: 14px; margin-bottom: 18px; }
.review-avatar { width: 48px; height: 48px; border-radius: 50%; background: var(--primary-gradient); display: flex; align-items: center; justify-content: center; font-weight: 800; color: #0B1120; font-size: 18px; padding: 2px; }
.review-avatar span { background: var(--bg-card); border-radius: 50%; width: 100%; height: 100%; display: flex; align-items: center; justify-content: center; }
.review-name { font-weight: 700; color: #fff; font-size: 15px; }
.review-tag { font-size: 12px; color: var(--text-secondary); margin-top: 2px; }
.review-stars { color: #F5A623; font-size: 14px; margin-bottom: 12px; letter-spacing: 2px; }
.review-text { color: var(--text-secondary); font-size: 14px; line-height: 1.8; }
/* Pricing */
.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; align-items: stretch; }
.price-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 24px; padding: 36px 32px; display: flex; flex-direction: column; transition: all .3s; position: relative; }
.price-card:hover { border-color: rgba(20,241,217,0.3); transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.price-card.popular { border: 2px solid transparent; background: linear-gradient(var(--bg-card), var(--bg-card)) padding-box, var(--primary-gradient) border-box; transform: scale(1.05); box-shadow: 0 20px 60px rgba(20,241,217,0.15); }
.price-card.popular:hover { transform: scale(1.05) translateY(-4px); }
.popular-badge { position: absolute; top: -14px; left: 50%; transform: translateX(-50%); background: var(--secondary-gradient); color: #0B1120; font-weight: 700; font-size: 13px; padding: 6px 18px; border-radius: 999px; white-space: nowrap; }
.price-name { font-size: 18px; font-weight: 700; color: #fff; margin-bottom: 16px; }
.price-amount { font-size: 48px; font-weight: 800; background: var(--primary-gradient); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; line-height: 1.1; margin-bottom: 8px; }
.price-unit { font-size: 16px; color: var(--text-secondary); font-weight: 400; }
.price-features { list-style: none; margin: 24px 0; display: flex; flex-direction: column; gap: 12px; flex: 1; }
.price-features li { display: flex; align-items: center; gap: 10px; font-size: 14px; color: var(--text-secondary); }
.price-features li i { color: var(--primary); font-size: 14px; width: 18px; }
.price-card .btn { width: 100%; margin-top: 12px; }
/* FAQ */
.faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.faq-item { background: var(--bg-card); border: 1px solid var(--border); border-radius: 16px; overflow: hidden; transition: border-color .3s; }
.faq-item:hover { border-color: rgba(20,241,217,0.3); }
.faq-item.open { border-color: rgba(20,241,217,0.4); }
.faq-question { display: flex; justify-content: space-between; align-items: center; padding: 20px 24px; cursor: pointer; font-size: 16px; font-weight: 600; color: #fff; }
.faq-icon { width: 24px; height: 24px; display: flex; align-items: center; justify-content: center; font-size: 20px; color: var(--primary); transition: transform .3s; flex-shrink: 0; }
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height .4s ease, padding .4s ease, opacity .4s ease; opacity: 0; padding: 0 24px; }
.faq-item.open .faq-answer { max-height: 300px; opacity: 1; padding: 0 24px 20px; }
.faq-answer p { font-size: 14px; color: var(--text-secondary); line-height: 1.8; }
/* CTA banner */
.cta-banner { border-radius: 32px; background: var(--primary-gradient); padding: 80px 60px; text-align: center; position: relative; overflow: hidden; }
.cta-banner::before { content: ''; position: absolute; width: 400px; height: 400px; border-radius: 50%; background: rgba(255,255,255,0.1); top: -150px; right: -100px; }
.cta-banner::after { content: ''; position: absolute; width: 300px; height: 300px; border-radius: 50%; background: rgba(255,255,255,0.08); bottom: -120px; left: -80px; }
.cta-banner h2 { font-size: 32px; font-weight: 800; color: #fff; margin-bottom: 14px; position: relative; z-index: 1; }
.cta-banner p { color: rgba(255,255,255,0.85); font-size: 16px; margin-bottom: 32px; position: relative; z-index: 1; }
.cta-banner .btn { position: relative; z-index: 1; }
/* Footer */
.site-footer { background: var(--bg-dark); border-top: 1px solid var(--border); padding: 64px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 48px; }
.footer-brand .logo-text { font-size: 18px; }
.footer-desc { color: var(--text-secondary); font-size: 14px; margin-top: 16px; max-width: 320px; line-height: 1.8; }
.footer-social { display: flex; gap: 12px; margin-top: 20px; }
.footer-social a { width: 36px; height: 36px; border-radius: 50%; border: 1px solid var(--border); display: flex; align-items: center; justify-content: center; color: var(--text-secondary); font-size: 14px; transition: all .3s; }
.footer-social a:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-3px); }
.footer-col-title { font-size: 15px; font-weight: 700; color: #fff; margin-bottom: 20px; }
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 12px; }
.footer-col a { color: var(--text-secondary); font-size: 14px; transition: color .3s, padding-left .3s; }
.footer-col a:hover { color: var(--primary); padding-left: 6px; }
.footer-bottom { border-top: 1px solid var(--border); padding: 24px 0; display: flex; justify-content: space-between; align-items: center; color: var(--text-muted); font-size: 13px; flex-wrap: wrap; gap: 12px; }
/* Mobile nav */
.mobile-menu-toggle { display: none; width: 44px; height: 44px; border-radius: 10px; border: 1px solid var(--border); background: transparent; flex-direction: column; align-items: center; justify-content: center; gap: 5px; }
.mobile-menu-toggle span { display: block; width: 20px; height: 2px; border-radius: 2px; background: var(--primary); transition: all .3s; }
.mobile-drawer { display: none; position: fixed; inset: 0; background: rgba(11,17,32,0.98); z-index: 999; flex-direction: column; justify-content: center; align-items: center; gap: 32px; padding: 40px; }
.mobile-drawer a { font-size: 24px; color: #fff; font-weight: 700; }
.mobile-drawer a.active { color: var(--primary); }
.mobile-drawer .btn { width: 200px; }
/* Breadcrumb & page */
.page-hero { position: relative; padding: 120px 0 60px; background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat; }
.page-hero-overlay { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(11,17,32,0.92), rgba(11,17,32,0.7)); }
.page-hero-content { position: relative; z-index: 1; max-width: 1280px; margin: 0 auto; padding: 0 32px; }
.breadcrumb { display: flex; gap: 10px; align-items: center; color: var(--text-muted); font-size: 14px; margin-bottom: 16px; flex-wrap: wrap; }
.breadcrumb a { color: var(--text-secondary); transition: color .3s; }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .current { color: #fff; }
.page-title { font-size: 36px; font-weight: 800; color: #fff; margin-bottom: 12px; }
.page-desc { color: var(--text-secondary); font-size: 14px; max-width: 600px; }
/* Article */
.article-section { padding: 40px 0 96px; }
.article-meta { display: flex; align-items: center; gap: 8px; color: var(--text-muted); font-size: 14px; flex-wrap: wrap; }
.article-share { display: flex; gap: 10px; margin-top: 20px; }
.article-share a { width: 40px; height: 40px; border-radius: 50%; border: 1px solid var(--border); display: flex; align-items: center; justify-content: center; color: var(--text-secondary); transition: all .3s; font-size: 15px; }
.article-share a:hover { color: var(--primary); border-color: var(--primary); transform: translateY(-3px); }
.article-content { max-width: 760px; margin: 0 auto; }
.article-body { margin-top: 40px; }
.article-body h2 { font-size: 24px; font-weight: 700; border-left: 4px solid var(--primary); padding-left: 16px; margin: 40px 0 16px; color: #fff; }
.article-body h3 { font-size: 20px; font-weight: 700; margin: 32px 0 12px; color: #fff; }
.article-body p { margin-bottom: 24px; font-size: 16px; line-height: 1.75; color: var(--text-secondary); }
.article-body blockquote { border-left: 4px solid var(--primary); background: var(--bg-elevated); border-radius: 12px; padding: 20px 24px; margin: 24px 0; color: var(--text-secondary); font-style: italic; }
.article-body ul { margin: 20px 0 24px; padding-left: 0; list-style: none; display: flex; flex-direction: column; gap: 10px; }
.article-body ul li { padding-left: 24px; position: relative; color: var(--text-secondary); }
.article-body ul li::before { content: ''; position: absolute; left: 4px; top: 10px; width: 6px; height: 6px; border-radius: 50%; background: var(--primary); }
.article-body ol { margin: 20px 0 24px; padding-left: 20px; display: flex; flex-direction: column; gap: 10px; }
.article-body ol li { color: var(--text-secondary); padding-left: 8px; }
.article-body ol li::marker { color: var(--secondary); font-weight: 700; }
.article-body img { border-radius: 16px; margin: 24px 0; }
.article-tags { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--border); }
.tag { background: var(--bg-elevated); border: 1px solid transparent; padding: 8px 18px; border-radius: 999px; font-size: 13px; color: var(--text-secondary); transition: all .3s; cursor: pointer; }
.tag:hover { border-color: var(--primary); color: var(--primary); }
/* Related */
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.related-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 20px; overflow: hidden; transition: all .3s; cursor: pointer; }
.related-card:hover { transform: translateY(-6px); border-color: rgba(20,241,217,0.4); box-shadow: var(--shadow-hover); }
.related-card img { width: 100%; aspect-ratio: 4/3; object-fit: cover; }
.related-card-body { padding: 20px; }
.related-card-title { font-weight: 600; font-size: 15px; color: #fff; line-height: 1.5; margin-bottom: 10px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
/* Category */
.cat-layout { display: grid; grid-template-columns: 1.6fr 1fr; gap: 40px; align-items: start; }
.cat-news-card { display: grid; grid-template-columns: 220px 1fr; gap: 24px; background: var(--bg-card); border: 1px solid var(--border); border-radius: 20px; padding: 20px; transition: all .3s; margin-bottom: 24px; }
.cat-news-card:hover { border-color: rgba(20,241,217,0.4); transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.cat-news-card img { width: 100%; aspect-ratio: 4/3; object-fit: cover; border-radius: 14px; }
.cat-news-body { display: flex; flex-direction: column; justify-content: center; }
.cat-news-title { font-size: 18px; font-weight: 700; color: #fff; margin-bottom: 10px; line-height: 1.5; }
.cat-news-desc { color: var(--text-secondary); font-size: 14px; margin-bottom: 14px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.cat-news-meta { display: flex; align-items: center; gap: 16px; font-size: 13px; color: var(--text-muted); }
.sidebar { position: sticky; top: 90px; display: flex; flex-direction: column; gap: 24px; }
.sidebar-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 20px; padding: 24px; }
.sidebar-title { font-size: 16px; font-weight: 700; color: #fff; margin-bottom: 16px; padding-bottom: 12px; border-bottom: 1px solid var(--border); }
.tag-cloud { display: flex; flex-wrap: wrap; gap: 10px; }
.recommend-list { display: flex; flex-direction: column; gap: 14px; }
.recommend-item { display: flex; gap: 12px; cursor: pointer; align-items: center; }
.recommend-item img { width: 64px; height: 64px; border-radius: 12px; object-fit: cover; flex-shrink: 0; }
.recommend-item-title { font-size: 14px; color: var(--text-secondary); line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; transition: color .3s; }
.recommend-item:hover .recommend-item-title { color: var(--primary); }
.pagination { display: flex; gap: 8px; margin-top: 40px; justify-content: center; }
.page-num { width: 40px; height: 40px; border-radius: 10px; display: flex; align-items: center; justify-content: center; background: var(--bg-card); color: var(--text-secondary); font-size: 14px; transition: all .3s; border: 1px solid var(--border); }
.page-num:hover { border-color: var(--primary); color: var(--primary); }
.page-num.active { background: var(--primary-gradient); color: #0B1120; font-weight: 700; border-color: transparent; }
/* Category guide grid */
.guide-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.guide-card { overflow: hidden; border-radius: 20px; background: var(--bg-card); border: 1px solid var(--border); transition: all .3s; }
.guide-card:hover { border-color: rgba(20,241,217,0.4); box-shadow: var(--shadow-hover); transform: translateY(-6px); }
.guide-card-img { overflow: hidden; }
.guide-card-img img { width: 100%; aspect-ratio: 16/9; object-fit: cover; transition: transform .5s ease; }
.guide-card:hover .guide-card-img img { transform: scale(1.05); }
.guide-card-body { padding: 24px; }
.guide-card-title { font-size: 20px; font-weight: 700; color: #fff; margin-bottom: 12px; }
.guide-card-desc { font-size: 14px; color: var(--text-secondary); line-height: 1.7; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 18px; }
.guide-card-link { color: var(--primary); font-weight: 600; font-size: 14px; display: inline-flex; align-items: center; gap: 6px; }
.guide-card-link:hover { gap: 10px; }
.light-cta { background: rgba(20,241,217,0.06); border: 1px solid rgba(20,241,217,0.2); border-radius: 24px; padding: 48px; text-align: center; }
@media (max-width: 1024px) {
  .nav-links { display: none; }
  .nav-cta .btn-outline { display: none; }
  .mobile-menu-toggle { display: flex; }
  .mobile-drawer { display: flex; }
  .hero-content { grid-template-columns: 1fr; gap: 48px; }
  .hero-title { font-size: 44px; }
  .hero-right { max-width: 560px; }
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .feature-card:nth-child(2), .feature-card:nth-child(4) { transform: none; }
  .feature-card:nth-child(2):hover, .feature-card:nth-child(4):hover { transform: translateY(-6px); }
  .scenario-wrap { grid-template-columns: 1fr; gap: 40px; }
  .news-grid { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }
  .price-card.popular { transform: scale(1); }
  .price-card.popular:hover { transform: scale(1) translateY(-4px); }
  .faq-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .cat-layout { grid-template-columns: 1fr; }
  .sidebar { position: static; }
  .guide-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .nav-wrap { padding: 0 16px; }
  .logo-text { font-size: 16px; }
  .hero-content { padding: 100px 16px 60px; }
  .hero-title { font-size: 34px; }
  .hero-subtitle { font-size: 16px; }
  .hero-cta .btn { padding: 0 20px; }
  .container { padding: 0 16px; }
  .section { padding: 64px 0; }
  .section-title { font-size: 28px; }
  .section-head { flex-direction: column; align-items: flex-start; gap: 12px; }
  .feature-grid { grid-template-columns: 1fr; gap: 16px; }
  .feature-card:nth-child(2), .feature-card:nth-child(4) { transform: none; }
  .feature-card:nth-child(2):hover, .feature-card:nth-child(4):hover { transform: translateY(-6px); }
  .scenario-item { padding: 20px 8px; }
  .scenario-item:hover { padding-left: 16px; }
  .news-main-body { padding: 20px; }
  .news-main-title { font-size: 18px; }
  .cat-news-card { grid-template-columns: 1fr; }
  .cat-news-card img { aspect-ratio: 16/9; }
  .cta-banner { padding: 48px 24px; border-radius: 20px; }
  .cta-banner h2 { font-size: 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .related-grid { grid-template-columns: 1fr; }
  .page-title { font-size: 28px; }
  .page-hero { padding: 100px 0 40px; }
}

/* roulang page: article */
:root {
            --primary: #14F1D9;
            --primary-gradient: linear-gradient(120deg, #14F1D9 0%, #3D7EFF 50%, #F5A623 100%);
            --secondary: #F5A623;
            --secondary-gradient: linear-gradient(135deg, #F5A623, #FF6B35);
            --bg-dark: #0B1120;
            --bg-card: #151E2E;
            --bg-elevated: #1E293B;
            --text-primary: #F1F5F9;
            --text-secondary: #94A3B8;
            --text-muted: #64748B;
            --border: rgba(148, 163, 184, 0.14);
            --radius-lg: 24px;
            --radius-md: 16px;
            --radius-sm: 12px;
            --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.25);
            --shadow-hover: 0 20px 50px rgba(0, 0, 0, 0.4);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background-color: var(--bg-dark);
            color: var(--text-primary);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: all 0.3s ease;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
            font-family: inherit;
        }

        ::selection {
            background: rgba(20, 241, 217, 0.3);
            color: var(--bg-dark);
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: 72px;
            background: rgba(11, 17, 32, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
            transition: all 0.3s ease;
        }

        .header-inner {
            height: 72px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
        }

        .logo-area {
            display: flex;
            align-items: center;
            gap: 12px;
            cursor: pointer;
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--primary-gradient);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 800;
            color: #0B1120;
            box-shadow: 0 0 20px rgba(20, 241, 217, 0.3);
        }

        .logo-text {
            font-size: 20px;
            font-weight: 800;
            color: #ffffff;
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
            list-style: none;
        }

        .nav-links a {
            font-size: 15px;
            color: var(--text-secondary);
            font-weight: 500;
            position: relative;
            padding: 8px 0;
        }

        .nav-links a:hover {
            color: #ffffff;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 2px;
            transition: width 0.3s ease;
        }

        .nav-links a:hover::after,
        .nav-links a.active::after {
            width: 100%;
        }

        .nav-links a.active {
            color: #ffffff;
        }

        .nav-cta {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 44px;
            padding: 0 28px;
            border-radius: 12px;
            font-size: 15px;
            font-weight: 700;
            color: #0B1120;
            background: linear-gradient(120deg, #14F1D9, #3D7EFF);
            box-shadow: 0 0 20px rgba(20, 241, 217, 0.2);
            border: 2px solid rgba(255, 255, 255, 0.1);
            transition: all 0.3s ease;
            white-space: nowrap;
        }

        .btn-primary:hover {
            filter: brightness(1.1);
            box-shadow: 0 0 30px rgba(20, 241, 217, 0.35);
            transform: translateY(-2px);
        }

        .btn-primary:active {
            transform: scale(0.97);
        }

        .btn-primary:focus-visible {
            outline: 2px solid rgba(255, 255, 255, 0.3);
            outline-offset: 2px;
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 44px;
            padding: 0 28px;
            border-radius: 12px;
            font-size: 15px;
            font-weight: 700;
            color: var(--primary);
            border: 1.5px solid var(--primary);
            background: transparent;
            transition: all 0.3s ease;
            white-space: nowrap;
        }

        .btn-outline:hover {
            background: rgba(20, 241, 217, 0.1);
            box-shadow: 0 0 20px rgba(20, 241, 217, 0.15);
            transform: translateY(-2px);
        }

        .btn-outline:active {
            transform: scale(0.97);
        }

        .btn-outline:focus-visible {
            outline: 2px solid rgba(255, 255, 255, 0.3);
            outline-offset: 2px;
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 6px;
            padding: 8px;
            cursor: pointer;
        }

        .hamburger span {
            width: 24px;
            height: 2px;
            background: var(--primary-gradient);
            border-radius: 2px;
            transition: all 0.3s ease;
        }

        .mobile-drawer {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(11, 17, 32, 0.98);
            backdrop-filter: blur(20px);
            z-index: 999;
            display: none;
            flex-direction: column;
            padding: 100px 32px 40px;
        }

        .mobile-drawer.open {
            display: flex;
        }

        .mobile-drawer .drawer-close {
            position: absolute;
            top: 24px;
            right: 24px;
            font-size: 32px;
            color: var(--text-secondary);
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .mobile-drawer .drawer-close:hover {
            color: var(--primary);
            transform: rotate(90deg);
        }

        .mobile-drawer ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .mobile-drawer ul a {
            font-size: 26px;
            font-weight: 800;
            color: var(--text-primary);
            padding: 8px 0;
            border-bottom: 1px solid var(--border);
            transition: all 0.3s ease;
        }

        .mobile-drawer ul a:hover,
        .mobile-drawer ul a.active {
            color: var(--primary);
            border-bottom-color: var(--primary);
        }

        .mobile-drawer .drawer-cta {
            display: flex;
            flex-direction: column;
            gap: 16px;
            margin-top: 40px;
        }

        .mobile-drawer .drawer-cta a {
            width: 100%;
        }

        .page-breadcrumb {
            padding-top: 120px;
            padding-bottom: 20px;
            border-bottom: 1px solid var(--border);
        }

        .breadcrumb-list {
            font-size: 14px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
        }

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

        .breadcrumb-list .current {
            color: #ffffff;
            max-width: 320px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .article-hero {
            padding: 48px 0 32px;
        }

        .article-header-area {
            max-width: 800px;
            margin: 0 auto;
            text-align: center;
        }

        .article-meta {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 14px;
            color: var(--text-secondary);
            margin-top: 20px;
        }

        .article-meta .dot {
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: var(--text-muted);
        }

        .article-meta .category-badge {
            display: inline-block;
            background: rgba(20, 241, 217, 0.12);
            border: 1px solid rgba(20, 241, 217, 0.3);
            color: var(--primary);
            font-size: 12px;
            font-weight: 700;
            padding: 4px 14px;
            border-radius: 999px;
        }

        .share-buttons {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
            margin-top: 24px;
        }

        .share-btn {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: var(--bg-elevated);
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            font-size: 16px;
            transition: all 0.3s ease;
        }

        .share-btn:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(20, 241, 217, 0.15);
        }

        .article-cover {
            max-width: 960px;
            margin: 32px auto 0;
            padding: 0 24px;
        }

        .article-cover .cover-wrap {
            border-radius: 24px;
            overflow: hidden;
            position: relative;
            aspect-ratio: 16/9;
            border: 1px solid rgba(20, 241, 217, 0.2);
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
        }

        .article-cover .cover-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .article-cover .cover-wrap::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(11, 17, 32, 0.5), transparent 50%);
            pointer-events: none;
        }

        .cover-caption {
            font-size: 13px;
            color: var(--text-muted);
            text-align: center;
            margin-top: 12px;
        }

        .article-body-wrap {
            max-width: 760px;
            margin: 48px auto 0;
            padding: 0 24px;
        }

        .article-body {
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-primary);
        }

        .article-body h2 {
            font-size: 24px;
            font-weight: 700;
            line-height: 1.3;
            margin: 40px 0 16px;
            padding-left: 16px;
            border-left: 4px solid var(--primary);
            color: #ffffff;
        }

        .article-body h3 {
            font-size: 20px;
            font-weight: 700;
            line-height: 1.3;
            margin: 32px 0 14px;
            color: #ffffff;
        }

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

        .article-body blockquote {
            margin: 32px 0;
            padding: 20px 24px;
            background: var(--bg-elevated);
            border-left: 4px solid var(--primary);
            border-radius: 12px;
            font-style: normal;
            color: var(--text-secondary);
        }

        .article-body blockquote p:last-child {
            margin-bottom: 0;
        }

        .article-body pre {
            background: #0B1120;
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 20px 24px;
            overflow-x: auto;
            margin: 24px 0;
            font-size: 14px;
            line-height: 1.6;
            color: var(--primary);
        }

        .article-body code {
            font-family: "SF Mono", "Consolas", monospace;
        }

        .article-body ul {
            margin: 24px 0;
            padding-left: 24px;
            list-style: none;
        }

        .article-body ul li {
            position: relative;
            margin-bottom: 12px;
            padding-left: 8px;
        }

        .article-body ul li::before {
            content: '';
            position: absolute;
            left: -16px;
            top: 12px;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--primary);
        }

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

        .article-body ol li {
            margin-bottom: 12px;
            padding-left: 8px;
        }

        .article-body ol li::marker {
            color: var(--secondary);
            font-weight: 800;
        }

        .article-body img {
            border-radius: 16px;
            margin: 24px 0;
        }

        .article-body table {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0;
            border: 1px solid var(--border);
            border-radius: 12px;
            overflow: hidden;
            margin: 24px 0;
            font-size: 15px;
        }

        .article-body table th {
            background: var(--bg-elevated);
            padding: 12px 16px;
            font-weight: 700;
            text-align: left;
            color: #ffffff;
        }

        .article-body table td {
            padding: 12px 16px;
            border-top: 1px solid var(--border);
        }

        .article-tags {
            max-width: 760px;
            margin: 48px auto 0;
            padding: 0 24px;
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }

        .tag-label {
            font-size: 14px;
            color: var(--text-secondary);
            font-weight: 700;
        }

        .tag-pill {
            display: inline-block;
            padding: 6px 18px;
            border-radius: 999px;
            background: var(--bg-elevated);
            border: 1px solid var(--border);
            font-size: 13px;
            color: var(--text-secondary);
            transition: all 0.3s ease;
        }

        .tag-pill:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        .related-section {
            max-width: 1280px;
            margin: 60px auto 0;
            padding: 0 24px;
        }

        .section-header {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            margin-bottom: 32px;
        }

        .section-title {
            font-size: 32px;
            font-weight: 800;
            color: #ffffff;
            line-height: 1.3;
        }

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

        .post-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 24px;
            overflow: hidden;
            transition: all 0.3s ease;
            box-shadow: var(--shadow-card);
            display: flex;
            flex-direction: column;
        }

        .post-card:hover {
            transform: translateY(-6px);
            border-color: rgba(20, 241, 217, 0.4);
            box-shadow: var(--shadow-hover);
        }

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

        .post-card .card-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

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

        .post-card .card-cover::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(11, 17, 32, 0.4), transparent 60%);
            pointer-events: none;
        }

        .post-card .card-body {
            padding: 24px 28px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .post-card .card-title {
            font-size: 18px;
            font-weight: 700;
            color: #ffffff;
            line-height: 1.4;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .post-card .card-excerpt {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 16px;
        }

        .post-card .card-meta {
            margin-top: auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-muted);
        }

        .post-card .card-meta .badge {
            background: rgba(20, 241, 217, 0.12);
            border: 1px solid rgba(20, 241, 217, 0.3);
            color: var(--primary);
            font-size: 12px;
            font-weight: 700;
            padding: 3px 12px;
            border-radius: 999px;
        }

        .prev-next {
            max-width: 760px;
            margin: 56px auto 0;
            padding: 0 24px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        .prev-next-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 20px 24px;
            display: flex;
            flex-direction: column;
            gap: 8px;
            transition: all 0.3s ease;
        }

        .prev-next-card:hover {
            border-color: rgba(20, 241, 217, 0.4);
            background: var(--bg-elevated);
        }

        .prev-next-card .pn-label {
            font-size: 13px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .prev-next-card .pn-label i {
            color: var(--primary);
        }

        .prev-next-card .pn-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.5;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .back-to-list {
            text-align: center;
            margin-top: 40px;
        }

        .cta-banner {
            max-width: 1280px;
            margin: 80px auto 0;
            padding: 0 24px;
        }

        .cta-inner {
            background: var(--primary-gradient);
            border-radius: 32px;
            padding: 48px 56px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-inner::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -20%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.2), transparent 70%);
            pointer-events: none;
        }

        .cta-title {
            font-size: 32px;
            font-weight: 800;
            color: #0B1120;
            margin-bottom: 12px;
        }

        .cta-sub {
            font-size: 16px;
            color: rgba(11, 17, 32, 0.8);
            margin-bottom: 28px;
        }

        .cta-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 56px;
            padding: 0 36px;
            background: #0B1120;
            color: #ffffff;
            border-radius: 12px;
            font-size: 18px;
            font-weight: 700;
            transition: all 0.3s ease;
            border: none;
        }

        .cta-btn:hover {
            transform: scale(1.02);
            box-shadow: 0 12px 40px rgba(11, 17, 32, 0.3);
        }

        .cta-btn:active {
            transform: scale(0.97);
        }

        .site-footer {
            background: var(--bg-dark);
            border-top: 1px solid var(--border);
            padding: 60px 0 0;
            margin-top: 80px;
        }

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

        .footer-brand .logo-text {
            font-size: 20px;
        }

        .footer-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 20px;
            max-width: 320px;
        }

        .footer-social {
            display: flex;
            gap: 12px;
        }

        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--bg-elevated);
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            font-size: 14px;
            transition: all 0.3s ease;
        }

        .footer-social a:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-3px);
        }

        .footer-col-title {
            font-size: 15px;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 16px;
        }

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

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

        .footer-col ul a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: all 0.3s ease;
        }

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

        .footer-bottom {
            border-top: 1px solid var(--border);
            padding: 20px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
        }

        @media (max-width: 1024px) {
            .nav-links {
                display: none;
            }

            .nav-cta {
                display: none;
            }

            .hamburger {
                display: flex;
            }

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

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

        @media (max-width: 768px) {
            .container {
                padding: 0 20px;
            }

            .logo-text {
                font-size: 18px;
            }

            .article-hero {
                padding: 32px 0 24px;
            }

            .section-title {
                font-size: 26px;
            }

            .cta-inner {
                padding: 36px 24px;
            }

            .cta-title {
                font-size: 24px;
            }

            .cta-sub {
                font-size: 14px;
            }

            .prev-next {
                grid-template-columns: 1fr;
            }

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

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

            .related-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }

        @media (max-width: 520px) {
            .logo-text {
                font-size: 16px;
            }

            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 18px;
            }

            .breadcrumb-list .current {
                max-width: 200px;
            }

            .article-meta {
                flex-wrap: wrap;
            }

            .share-buttons {
                gap: 8px;
            }

            .article-body-wrap {
                padding: 0 16px;
                margin-top: 32px;
            }

            .article-tags {
                padding: 0 16px;
            }

            .related-section {
                padding: 0 16px;
            }

            .prev-next {
                padding: 0 16px;
            }

            .cta-banner {
                padding: 0 16px;
            }

            .cta-inner {
                border-radius: 20px;
                padding: 32px 20px;
            }
        }

/* roulang page: category1 */
:root {
      --primary: #14F1D9;
      --primary-gradient: linear-gradient(120deg, #14F1D9 0%, #3D7EFF 50%, #F5A623 100%);
      --secondary: #F5A623;
      --secondary-gradient: linear-gradient(135deg, #F5A623, #FF6B35);
      --bg-dark: #0B1120;
      --bg-card: #151E2E;
      --bg-elevated: #1E293B;
      --text-primary: #F1F5F9;
      --text-secondary: #94A3B8;
      --text-muted: #64748B;
      --border: rgba(148, 163, 184, 0.14);
      --success: #34D399;
      --warning: #FBBF24;
      --error: #F87171;
      --info: #60A5FA;
      --radius-lg: 24px;
      --radius-md: 16px;
      --radius-sm: 12px;
      --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.25);
      --shadow-hover: 0 20px 50px rgba(0, 0, 0, 0.4);
      --transition: 300ms ease;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      font-size: 16px;
      line-height: 1.75;
      background: var(--bg-dark);
      color: var(--text-primary);
      -webkit-font-smoothing: antialiased;
    }
    img {
      max-width: 100%;
      display: block;
    }
    a {
      color: inherit;
      text-decoration: none;
    }
    ul {
      list-style: none;
    }
    button {
      font-family: inherit;
      cursor: pointer;
      border: none;
      background: none;
    }
    ::selection {
      background: rgba(20, 241, 217, 0.3);
      color: #0B1120;
    }
    .container {
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* ===== Header ===== */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 100;
      height: 72px;
      background: rgba(11, 17, 32, 0.85);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-bottom: 1px solid var(--border);
      box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
    }
    .header-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .logo-area {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-shrink: 0;
    }
    .logo-icon {
      width: 36px;
      height: 36px;
      border-radius: 10px;
      background: var(--primary-gradient);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      font-weight: 800;
      color: #0B1120;
      flex-shrink: 0;
    }
    .logo-text {
      font-size: 20px;
      font-weight: 800;
      color: #fff;
      white-space: nowrap;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
    }
    .nav-links a {
      font-size: 15px;
      color: var(--text-secondary);
      font-weight: 500;
      transition: color 300ms;
      position: relative;
      padding: 4px 0;
    }
    .nav-links a:hover {
      color: #fff;
    }
    .nav-links a:hover::after,
    .nav-links a.active::after {
      content: "";
      position: absolute;
      left: 0;
      bottom: -2px;
      width: 100%;
      height: 2px;
      background: var(--primary-gradient);
      border-radius: 2px;
    }
    .nav-links a.active {
      color: #fff;
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    /* ===== Buttons ===== */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      height: 44px;
      padding: 0 24px;
      border-radius: 12px;
      font-size: 15px;
      font-weight: 700;
      transition: all 300ms ease;
      border: none;
      white-space: nowrap;
      cursor: pointer;
    }
    .btn:active {
      transform: scale(0.97);
    }
    .btn:focus-visible {
      outline: 2px solid rgba(255, 255, 255, 0.3);
      outline-offset: 2px;
    }
    .btn-primary {
      background: var(--primary-gradient);
      color: #0B1120;
      box-shadow: 0 0 20px rgba(20, 241, 217, 0.15);
    }
    .btn-primary:hover {
      filter: brightness(1.1);
      box-shadow: 0 0 30px rgba(20, 241, 217, 0.35);
      transform: translateY(-2px);
    }
    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--primary);
      color: var(--primary);
    }
    .btn-outline:hover {
      background: rgba(20, 241, 217, 0.1);
      box-shadow: 0 0 20px rgba(20, 241, 217, 0.15);
    }
    .btn-dark {
      background: #0B1120;
      color: #fff;
      border: 1.5px solid rgba(255, 255, 255, 0.15);
      box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
    }
    .btn-dark:hover {
      transform: scale(1.02);
      box-shadow: 0 10px 40px rgba(0, 0, 0, 0.45);
      border-color: rgba(255, 255, 255, 0.3);
    }
    .btn-light {
      background: rgba(255, 255, 255, 0.95);
      color: #0B1120;
      border: none;
    }
    .btn-light:hover {
      transform: scale(1.02);
      box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
    }

    /* ===== Hamburger ===== */
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      padding: 8px;
      border-radius: 8px;
    }
    .hamburger span {
      width: 24px;
      height: 2px;
      background: var(--primary-gradient);
      border-radius: 2px;
      transition: all 300ms;
    }
    .hamburger:hover span {
      box-shadow: 0 0 12px rgba(20, 241, 217, 0.5);
    }

    /* ===== Mobile Menu ===== */
    .mobile-menu {
      position: fixed;
      top: 72px;
      left: 0;
      right: 0;
      bottom: 0;
      background: rgba(11, 17, 32, 0.98);
      backdrop-filter: blur(24px);
      -webkit-backdrop-filter: blur(24px);
      z-index: 99;
      padding: 48px 32px;
      display: flex;
      flex-direction: column;
      gap: 8px;
      transform: translateX(100%);
      transition: transform 350ms ease;
      overflow-y: auto;
    }
    .mobile-menu.open {
      transform: translateX(0);
    }
    .mobile-menu a {
      font-size: 24px;
      font-weight: 800;
      color: var(--text-primary);
      padding: 14px 0;
      border-bottom: 1px solid var(--border);
      transition: color 300ms;
    }
    .mobile-menu a:hover {
      color: var(--primary);
    }
    .mobile-menu a.active {
      color: var(--primary);
    }
    .mobile-menu .mobile-actions {
      display: flex;
      flex-direction: column;
      gap: 16px;
      margin-top: 24px;
    }

    /* ===== Hero ===== */
    .category-hero {
      position: relative;
      padding: 160px 0 88px;
      background: linear-gradient(120deg, rgba(11, 17, 32, 0.95) 0%, rgba(11, 17, 32, 0.78) 55%, rgba(20, 241, 217, 0.08) 100%), url('/assets/images/backpic/back-1.png') center / cover no-repeat;
      border-bottom: 1px solid var(--border);
    }
    .breadcrumb {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .breadcrumb a {
      color: var(--text-secondary);
      transition: color 300ms;
    }
    .breadcrumb a:hover {
      color: var(--primary);
    }
    .breadcrumb .sep {
      color: var(--text-muted);
    }
    .breadcrumb .current {
      color: #fff;
    }
    .category-hero h1 {
      font-size: 42px;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 16px;
      background: linear-gradient(120deg, #fff 0%, rgba(255, 255, 255, 0.85) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .category-hero .hero-desc {
      font-size: 17px;
      color: var(--text-secondary);
      max-width: 560px;
      margin-bottom: 32px;
      line-height: 1.75;
    }
    .hero-buttons {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 40px;
    }
    .hero-stats {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
    }
    .stat-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(20, 241, 217, 0.12);
      border: 1px solid rgba(20, 241, 217, 0.3);
      border-radius: 999px;
      padding: 6px 16px;
      backdrop-filter: blur(10px);
    }
    .stat-badge strong {
      font-size: 20px;
      font-weight: 800;
      color: var(--primary);
    }
    .stat-badge span {
      font-size: 13px;
      color: var(--text-secondary);
    }

    /* ===== Section Common ===== */
    .section {
      padding: 80px 0;
      position: relative;
    }
    .section-header {
      display: flex;
      align-items: flex-end;
      justify-content: space-between;
      margin-bottom: 48px;
      gap: 16px;
      flex-wrap: wrap;
    }
    .section-header h2 {
      font-size: 36px;
      font-weight: 800;
      line-height: 1.3;
      color: #fff;
      margin: 0;
    }
    .section-header h2 .highlight {
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .section-header .header-link {
      font-size: 15px;
      color: var(--text-secondary);
      transition: color 300ms;
      white-space: nowrap;
    }
    .section-header .header-link:hover {
      color: var(--primary);
    }
    .section-header .header-link i {
      margin-left: 6px;
      transition: transform 300ms;
    }
    .section-header .header-link:hover i {
      transform: translateX(4px);
    }

    /* ===== Cards ===== */
    .card {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-card);
      transition: all var(--transition);
      overflow: hidden;
    }
    .card:hover {
      border-color: rgba(20, 241, 217, 0.4);
      box-shadow: var(--shadow-hover);
      transform: translateY(-6px);
    }

    /* ===== Feature Grid ===== */
    .feature-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 28px;
      box-shadow: var(--shadow-card);
      transition: all var(--transition);
      position: relative;
      overflow: hidden;
    }
    .feature-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 3px;
      background: var(--primary-gradient);
      opacity: 0;
      transition: opacity 300ms;
    }
    .feature-card:hover::before {
      opacity: 1;
    }
    .feature-card:hover {
      border-color: rgba(20, 241, 217, 0.35);
      box-shadow: var(--shadow-hover);
      transform: translateY(-6px);
    }
    .feature-card .icon-wrap {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: rgba(20, 241, 217, 0.1);
      border: 1px solid rgba(20, 241, 217, 0.25);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      font-size: 20px;
      color: var(--primary);
    }
    .feature-card h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
      color: #fff;
    }
    .feature-card p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.7;
      margin-bottom: 16px;
    }
    .feature-card .card-link {
      font-size: 14px;
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .feature-card .card-link i {
      transition: transform 300ms;
      font-size: 12px;
    }
    .feature-card .card-link:hover i {
      transform: translateX(4px);
    }
    .feature-grid .offset {
      transform: translateY(24px);
    }
    .feature-grid .offset:hover {
      transform: translateY(16px);
    }

    /* ===== Content Type Section ===== */
    .content-type-section {
      background: linear-gradient(180deg, var(--bg-dark) 0%, rgba(30, 41, 59, 0.3) 50%, var(--bg-dark) 100%);
    }
    .content-type-grid {
      display: grid;
      grid-template-columns: repeat(6, 1fr);
      gap: 24px;
    }
    .content-type-card {
      grid-column: span 2;
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 28px;
      box-shadow: var(--shadow-card);
      transition: all var(--transition);
      display: flex;
      flex-direction: column;
    }
    .content-type-card:first-child {
      grid-column: span 3;
    }
    .content-type-card:nth-child(2) {
      grid-column: span 3;
    }
    .content-type-card:nth-child(3) {
      grid-column: span 2;
    }
    .content-type-card:nth-child(4) {
      grid-column: span 2;
    }
    .content-type-card:nth-child(5) {
      grid-column: span 2;
    }
    .content-type-card:hover {
      border-color: rgba(20, 241, 217, 0.4);
      box-shadow: var(--shadow-hover);
      transform: translateY(-6px);
    }
    .content-type-card .thumb {
      border-radius: var(--radius-md);
      overflow: hidden;
      margin-bottom: 18px;
      aspect-ratio: 4 / 3;
      background: var(--bg-elevated);
      position: relative;
    }
    .content-type-card .thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 500ms ease;
    }
    .content-type-card:hover .thumb img {
      transform: scale(1.05);
    }
    .content-type-card .thumb::after {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(to top, rgba(11, 17, 32, 0.35), transparent 60%);
    }
    .content-type-card .type-icon {
      width: 40px;
      height: 40px;
      border-radius: 12px;
      background: rgba(20, 241, 217, 0.1);
      border: 1px solid rgba(20, 241, 217, 0.25);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 17px;
      color: var(--primary);
      margin-bottom: 14px;
    }
    .content-type-card h3 {
      font-size: 20px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 10px;
    }
    .content-type-card p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.7;
      flex: 1;
    }
    .content-type-card .type-tag {
      margin-top: 14px;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 13px;
      color: var(--secondary);
      font-weight: 600;
    }

    /* ===== Process Section ===== */
    .process-section {
      background: var(--bg-elevated);
    }
    .process-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      counter-reset: step;
    }
    .process-item {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 28px;
      position: relative;
      transition: all var(--transition);
      box-shadow: var(--shadow-card);
    }
    .process-item:hover {
      border-color: rgba(20, 241, 217, 0.35);
      box-shadow: var(--shadow-hover);
      transform: translateY(-6px);
    }
    .process-item .step-num {
      font-size: 32px;
      font-weight: 800;
      color: var(--secondary);
      line-height: 1;
      margin-bottom: 18px;
      display: block;
    }
    .process-item h3 {
      font-size: 17px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 8px;
    }
    .process-item p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.7;
    }
    .process-item .step-line {
      position: absolute;
      top: 50%;
      right: -24px;
      width: 24px;
      height: 1px;
      background: linear-gradient(90deg, var(--primary), transparent);
      transform: translateY(-50%);
    }
    .process-item:last-child .step-line {
      display: none;
    }

    /* ===== Hot Section ===== */
    .hot-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-bottom: 48px;
    }
    .hot-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: 999px;
      padding: 8px 18px;
      font-size: 14px;
      color: var(--text-secondary);
      transition: all var(--transition);
      cursor: pointer;
    }
    .hot-tag:hover {
      border-color: rgba(20, 241, 217, 0.4);
      color: var(--primary);
      background: rgba(20, 241, 217, 0.05);
      box-shadow: 0 0 20px rgba(20, 241, 217, 0.1);
    }
    .hot-tag i {
      font-size: 12px;
      color: var(--secondary);
    }
    .hot-scroll {
      display: flex;
      gap: 20px;
      overflow-x: auto;
      padding: 4px 4px 16px;
      scrollbar-width: thin;
      scrollbar-color: var(--bg-elevated) transparent;
      scroll-snap-type: x mandatory;
    }
    .hot-scroll::-webkit-scrollbar {
      height: 6px;
    }
    .hot-scroll::-webkit-scrollbar-track {
      background: transparent;
    }
    .hot-scroll::-webkit-scrollbar-thumb {
      background: var(--bg-elevated);
      border-radius: 999px;
    }
    .hot-card {
      flex: 0 0 320px;
      scroll-snap-align: start;
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      transition: all var(--transition);
      box-shadow: var(--shadow-card);
    }
    .hot-card:hover {
      border-color: rgba(20, 241, 217, 0.4);
      box-shadow: var(--shadow-hover);
      transform: translateY(-6px);
    }
    .hot-card .hot-thumb {
      aspect-ratio: 4 / 3;
      overflow: hidden;
      position: relative;
    }
    .hot-card .hot-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 500ms ease;
    }
    .hot-card:hover .hot-thumb img {
      transform: scale(1.05);
    }
    .hot-card .hot-thumb::after {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(to top, rgba(11, 17, 32, 0.5), transparent 60%);
    }
    .hot-card .hot-badge {
      position: absolute;
      left: 16px;
      top: 16px;
      z-index: 1;
      background: rgba(11, 17, 32, 0.75);
      border: 1px solid rgba(20, 241, 217, 0.3);
      color: var(--primary);
      font-size: 13px;
      font-weight: 700;
      padding: 4px 12px;
      border-radius: 999px;
      backdrop-filter: blur(8px);
    }
    .hot-card .hot-body {
      padding: 20px 24px 24px;
    }
    .hot-card .hot-body h3 {
      font-size: 17px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 8px;
      line-height: 1.4;
    }
    .hot-card .hot-body p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.6;
      margin-bottom: 12px;
    }
    .hot-card .hot-meta {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      color: var(--text-muted);
    }
    .hot-card .hot-meta .dot {
      width: 4px;
      height: 4px;
      border-radius: 50%;
      background: var(--text-muted);
    }

    /* ===== FAQ ===== */
    .faq-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }
    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      transition: all var(--transition);
      overflow: hidden;
    }
    .faq-item:hover {
      border-color: rgba(20, 241, 217, 0.3);
    }
    .faq-item.open {
      border-color: rgba(20, 241, 217, 0.4);
    }
    .faq-question {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 20px 24px;
      font-size: 16px;
      font-weight: 600;
      color: #fff;
      cursor: pointer;
      width: 100%;
      text-align: left;
      transition: color 300ms;
    }
    .faq-question:hover {
      color: var(--primary);
    }
    .faq-icon {
      flex-shrink: 0;
      width: 28px;
      height: 28px;
      border-radius: 50%;
      background: rgba(20, 241, 217, 0.1);
      border: 1px solid rgba(20, 241, 217, 0.25);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-size: 14px;
      transition: transform 400ms ease, background 300ms;
    }
    .faq-item.open .faq-icon {
      transform: rotate(45deg);
      background: rgba(20, 241, 217, 0.2);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      opacity: 0;
      transition: max-height 400ms ease, opacity 300ms ease;
      padding: 0 24px;
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.75;
    }
    .faq-item.open .faq-answer {
      max-height: 300px;
      opacity: 1;
      padding-bottom: 20px;
    }

    /* ===== CTA ===== */
    .cta-section {
      padding: 80px 0;
    }
    .cta-banner {
      background: var(--primary-gradient);
      border-radius: 32px;
      padding: 64px 48px;
      text-align: center;
      position: relative;
      overflow: hidden;
      box-shadow: 0 20px 60px rgba(20, 241, 217, 0.25);
    }
    .cta-banner::before {
      content: "";
      position: absolute;
      top: -60px;
      right: -60px;
      width: 200px;
      height: 200px;
      background: rgba(255, 255, 255, 0.12);
      border-radius: 50%;
      pointer-events: none;
    }
    .cta-banner::after {
      content: "";
      position: absolute;
      bottom: -80px;
      left: -30px;
      width: 160px;
      height: 160px;
      background: rgba(11, 17, 32, 0.12);
      border-radius: 50%;
      pointer-events: none;
    }
    .cta-banner h2 {
      font-size: 32px;
      font-weight: 800;
      color: #fff;
      margin-bottom: 12px;
      position: relative;
      z-index: 1;
    }
    .cta-banner p {
      font-size: 16px;
      color: rgba(255, 255, 255, 0.9);
      margin-bottom: 28px;
      position: relative;
      z-index: 1;
    }
    .cta-banner .btn {
      position: relative;
      z-index: 1;
    }

    /* ===== Footer ===== */
    .site-footer {
      background: var(--bg-dark);
      border-top: 1px solid var(--border);
      padding: 64px 0 0;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1fr;
      gap: 48px;
      padding-bottom: 48px;
    }
    .footer-desc {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.75;
      margin-bottom: 20px;
    }
    .footer-social {
      display: flex;
      gap: 12px;
    }
    .footer-social a {
      width: 40px;
      height: 40px;
      border-radius: 12px;
      background: var(--bg-card);
      border: 1px solid var(--border);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--text-secondary);
      font-size: 16px;
      transition: all var(--transition);
    }
    .footer-social a:hover {
      color: var(--primary);
      border-color: rgba(20, 241, 217, 0.35);
      background: rgba(20, 241, 217, 0.08);
      transform: translateY(-3px);
    }
    .footer-col-title {
      font-size: 16px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 20px;
    }
    .footer-col ul {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .footer-col ul a {
      font-size: 14px;
      color: var(--text-secondary);
      transition: color 300ms;
    }
    .footer-col ul a:hover {
      color: var(--primary);
    }
    .footer-bottom {
      border-top: 1px solid var(--border);
      padding: 20px 0;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 8px;
      font-size: 13px;
      color: var(--text-muted);
    }

    /* ===== Responsive ===== */
    @media (max-width: 1024px) {
      .nav-links {
        display: none;
      }
      .nav-actions {
        display: none;
      }
      .hamburger {
        display: flex;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
      }
      .category-hero h1 {
        font-size: 36px;
      }
      .feature-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
      }
      .feature-grid .offset {
        transform: none;
      }
      .feature-grid .offset:hover {
        transform: translateY(-6px);
      }
      .content-type-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .content-type-card,
      .content-type-card:first-child,
      .content-type-card:nth-child(2),
      .content-type-card:nth-child(3),
      .content-type-card:nth-child(4),
      .content-type-card:nth-child(5) {
        grid-column: span 1;
      }
      .process-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
      }
      .process-item .step-line {
        display: none;
      }
    }
    @media (max-width: 640px) {
      .container {
        padding: 0 20px;
      }
      .section {
        padding: 56px 0;
      }
      .section-header h2 {
        font-size: 28px;
      }
      .category-hero {
        padding: 130px 0 64px;
      }
      .category-hero h1 {
        font-size: 30px;
      }
      .hero-buttons .btn {
        flex: 1;
      }
      .stat-badge {
        padding: 4px 12px;
      }
      .stat-badge strong {
        font-size: 16px;
      }
      .stat-badge span {
        font-size: 12px;
      }
      .feature-grid {
        grid-template-columns: 1fr;
      }
      .content-type-grid {
        grid-template-columns: 1fr;
      }
      .process-grid {
        grid-template-columns: 1fr;
      }
      .faq-grid {
        grid-template-columns: 1fr;
      }
      .cta-banner {
        padding: 40px 24px;
        border-radius: 24px;
      }
      .cta-banner h2 {
        font-size: 26px;
      }
      .cta-banner p {
        font-size: 14px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
      }
      .footer-bottom {
        flex-direction: column;
        text-align: center;
        justify-content: center;
      }
      .hot-card {
        flex-basis: 280px;
      }
    }
    @media (max-width: 375px) {
      .logo-text {
        font-size: 17px;
      }
      .hot-card {
        flex-basis: 250px;
      }
      .category-hero h1 {
        font-size: 26px;
      }
      .hero-desc {
        font-size: 15px;
      }
    }

/* roulang page: category2 */
:root {
            --primary: #14F1D9;
            --secondary: #F5A623;
            --primary-gradient: linear-gradient(120deg, #14F1D9 0%, #3D7EFF 50%, #F5A623 100%);
            --secondary-gradient: linear-gradient(135deg, #F5A623, #FF6B35);
            --bg-dark: #0B1120;
            --bg-card: #151E2E;
            --bg-elevated: #1E293B;
            --text-primary: #F1F5F9;
            --text-secondary: #94A3B8;
            --text-muted: #64748B;
            --border: rgba(148, 163, 184, 0.14);
            --success: #34D399;
            --warning: #FBBF24;
            --error: #F87171;
            --info: #60A5FA;
            --radius: 24px;
            --radius-sm: 12px;
            --shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
            --shadow-hover: 0 20px 50px rgba(0, 0, 0, 0.4);
        }

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

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background: var(--bg-dark);
            color: var(--text-primary);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color .3s ease;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
            font-family: inherit;
        }

        ::selection {
            background: rgba(20, 241, 217, 0.3);
            color: var(--text-primary);
        }

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

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* Header */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            height: 72px;
            background: rgba(11, 17, 32, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 24px;
        }

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

        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--primary-gradient);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 800;
            color: #0B1120;
            flex-shrink: 0;
        }

        .logo-text {
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            white-space: nowrap;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
            list-style: none;
        }

        .nav-links a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 0;
            position: relative;
            transition: color .3s;
        }

        .nav-links a:hover {
            color: #fff;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 100%;
            height: 2px;
            background: var(--primary-gradient);
            border-radius: 2px;
            transform: scaleX(0);
            transition: transform .3s;
        }

        .nav-links a:hover::after,
        .nav-links a.active::after {
            transform: scaleX(1);
        }

        .nav-links a.active {
            color: #fff;
            font-weight: 600;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 44px;
            padding: 0 32px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 700;
            transition: all .3s ease;
            white-space: nowrap;
            line-height: 1;
        }

        .btn-primary {
            background: var(--primary-gradient);
            color: #0B1120;
            box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.1), 0 0 20px rgba(20, 241, 217, 0.2);
        }

        .btn-primary:hover {
            filter: brightness(1.1);
            box-shadow: 0 0 30px rgba(20, 241, 217, 0.35), 0 0 0 2px rgba(255, 255, 255, 0.15);
        }

        .btn-ghost {
            border: 1.5px solid var(--primary);
            color: var(--primary);
            background: transparent;
        }

        .btn-ghost:hover {
            background: rgba(20, 241, 217, 0.1);
            box-shadow: 0 0 20px rgba(20, 241, 217, 0.15);
        }

        .btn-dark {
            background: #0B1120;
            color: #fff;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }

        .btn-dark:hover {
            transform: scale(1.02);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
        }

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

        .btn:active {
            transform: scale(0.97);
        }

        .btn:focus-visible {
            outline: 2px solid rgba(255, 255, 255, 0.3);
            outline-offset: 2px;
        }

        /* Menu Toggle */
        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            z-index: 102;
        }

        .menu-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: all .3s;
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 72px;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(11, 17, 32, 0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            z-index: 99;
            padding: 32px 24px;
            flex-direction: column;
            overflow-y: auto;
        }

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

        .mobile-menu a {
            font-size: 24px;
            font-weight: 600;
            color: var(--text-secondary);
            padding: 16px 0;
            border-bottom: 1px solid var(--border);
            transition: color .3s;
        }

        .mobile-menu a.active,
        .mobile-menu a:hover {
            color: var(--primary);
        }

        .mobile-menu-actions {
            display: flex;
            flex-direction: column;
            gap: 16px;
            margin-top: 32px;
        }

        @media (max-width: 1024px) {
            .nav-links {
                display: none;
            }
            .header-actions {
                display: none;
            }
            .menu-toggle {
                display: flex;
            }
        }

        /* Hero */
        .category-hero {
            position: relative;
            min-height: 240px;
            padding: 120px 0 48px;
            background-size: cover;
            background-position: center;
            display: flex;
            align-items: center;
        }

        .category-hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(11, 17, 32, 0.95) 0%, rgba(11, 17, 32, 0.75) 50%, rgba(11, 17, 32, 0.45) 100%);
        }

        .category-hero-content {
            position: relative;
            z-index: 1;
            width: 100%;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--text-secondary);
            transition: color .3s;
        }

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

        .breadcrumb .current {
            color: #fff;
        }

        .category-hero-content h1 {
            font-size: 42px;
            font-weight: 800;
            line-height: 1.3;
            color: #fff;
            margin-bottom: 12px;
        }

        .category-hero-content p {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 640px;
        }

        @media (max-width: 640px) {
            .category-hero {
                padding: 100px 0 36px;
            }
            .category-hero-content h1 {
                font-size: 32px;
            }
        }

        /* Section */
        .section {
            padding: 80px 0;
        }

        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
        }

        .section-head {
            margin-bottom: 48px;
        }

        .section-head h2 {
            font-size: 36px;
            font-weight: 800;
            color: #fff;
            line-height: 1.3;
            margin-bottom: 8px;
        }

        .section-head p {
            font-size: 16px;
            color: var(--text-secondary);
        }

        @media (max-width: 640px) {
            .section-head h2 {
                font-size: 28px;
            }
            .section-head p {
                font-size: 14px;
            }
        }

        /* Quick Guide */
        .quick-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        @media (max-width: 1024px) {
            .quick-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

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

        .feature-card {
            display: block;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 28px;
            transition: all .3s ease;
        }

        .feature-card:hover {
            transform: translateY(-6px);
            border-color: rgba(20, 241, 217, 0.4);
            box-shadow: var(--shadow-hover);
        }

        .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: 16px;
            background: rgba(20, 241, 217, 0.12);
            border: 1px solid rgba(20, 241, 217, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 16px;
        }

        .feature-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }

        .feature-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .link-arrow {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap .3s ease;
        }

        .feature-card:hover .link-arrow {
            gap: 8px;
        }

        /* Guide Cards */
        .guide-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

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

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

        .guide-card:hover {
            transform: translateY(-6px);
            border-color: rgba(20, 241, 217, 0.4);
            box-shadow: var(--shadow-hover);
        }

        .guide-thumb {
            width: 100%;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            position: relative;
        }

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

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

        .guide-body {
            padding: 24px 28px 28px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .guide-body h3 {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }

        .guide-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

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

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

        .step-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 32px 28px;
            position: relative;
            transition: all .3s ease;
        }

        .step-card:hover {
            background: var(--bg-elevated);
            transform: translateY(-4px);
            border-color: rgba(20, 241, 217, 0.3);
        }

        .step-num {
            font-size: 40px;
            font-weight: 800;
            color: var(--secondary);
            line-height: 1;
            display: block;
            margin-bottom: 16px;
        }

        .step-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }

        .step-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* Stats */
        .stats-section {
            background: var(--bg-elevated);
        }

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

        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
        }

        .stat-item {
            text-align: center;
            padding: 32px 16px;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            transition: all .3s ease;
        }

        .stat-item:hover {
            border-color: rgba(20, 241, 217, 0.4);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
        }

        .stat-num {
            font-size: 36px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            display: block;
        }

        .stat-label {
            font-size: 14px;
            color: var(--text-secondary);
            display: block;
            margin-top: 8px;
        }

        /* FAQ */
        .faq-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

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

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 16px;
            overflow: hidden;
            transition: border-color .3s ease;
        }

        .faq-item.active {
            border-color: rgba(20, 241, 217, 0.4);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            text-align: left;
            transition: background .3s;
        }

        .faq-question:hover {
            background: rgba(148, 163, 184, 0.05);
        }

        .faq-icon {
            font-size: 22px;
            color: var(--primary);
            line-height: 1;
            flex-shrink: 0;
            transition: transform .3s;
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .4s ease;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
        }

        .faq-answer p {
            padding: 0 24px 20px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
        }

        /* CTA */
        .cta-banner {
            background: var(--primary-gradient);
            border-radius: 32px;
            padding: 56px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-banner h2 {
            font-size: 32px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 8px;
        }

        .cta-banner p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 24px;
        }

        @media (max-width: 640px) {
            .cta-banner {
                padding: 40px 24px;
                border-radius: 24px;
            }
            .cta-banner h2 {
                font-size: 24px;
            }
            .cta-banner p {
                font-size: 14px;
            }
        }

        /* Footer */
        .site-footer {
            background: var(--bg-dark);
            border-top: 1px solid var(--border);
            padding: 64px 0 0;
        }

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

        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 20px;
            max-width: 320px;
        }

        .footer-social {
            display: flex;
            gap: 12px;
        }

        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--bg-card);
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            transition: all .3s;
        }

        .footer-social a:hover {
            color: var(--primary);
            border-color: rgba(20, 241, 217, 0.4);
            transform: translateY(-2px);
        }

        .footer-col-title {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

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

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

        .footer-col ul a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: color .3s;
        }

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

        .footer-bottom {
            border-top: 1px solid var(--border);
            padding: 20px 0;
            display: flex;
            justify-content: center;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px 24px;
            font-size: 13px;
            color: var(--text-muted);
        }

        @media (max-width: 640px) {
            .footer-bottom {
                flex-direction: column;
                gap: 6px;
                text-align: center;
            }
        }