/* roulang page: index */
/* ===== 1. Design Tokens ===== */
:root {
  --primary: #0891b2;
  --primary-dark: #0e7490;
  --primary-light: #06b6d4;
  --accent: #22d3ee;
  --dark: #0f172a;
  --dark-2: #1e293b;
  --light-bg: #f0f9ff;
  --light-bg-2: #e6f4f8;
  --white: #ffffff;
  --text: #1e293b;
  --text-muted: #64748b;
  --text-on-dark: #f1f5f9;
  --border: #e2e8f0;
  --border-dark: #334155;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 8px;
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, .06);
  --shadow-md: 0 8px 30px rgba(15, 23, 42, .08);
  --shadow-lg: 0 20px 50px rgba(2, 132, 199, .12);
  --shadow-drawer: 0 10px 40px rgba(15, 23, 42, .18);
  --transition: all .3s cubic-bezier(.25, .8, .25, 1);
  --container: 1200px;
  --header-h: 76px;
  --tabbar-h: 64px;
}
/* ===== 2. Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--light-bg);
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary); }
img { max-width: 100%; display: block; }
button, input, select, textarea { font: inherit; border: none; outline: none; background: none; }
ul, ol { list-style: none; }
i.fas, i.far, i.fab { pointer-events: none; }
/* ===== 3. Layout Helpers ===== */
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; position: relative; }
.section-alt { background: var(--white); }
.section-header { text-align: center; max-width: 680px; margin: 0 auto 60px; }
.section-header .eyebrow {
  display: inline-block;
  background: rgba(6, 182, 212, .1);
  color: var(--primary);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .08em;
  padding: 6px 18px;
  border-radius: 999px;
  margin-bottom: 18px;
  text-transform: uppercase;
}
.section-header h2 { font-size: clamp(30px, 4vw, 42px); font-weight: 800; line-height: 1.3; letter-spacing: -.02em; color: var(--dark); }
.section-header h2 span { color: var(--primary); }
.section-header p { margin-top: 14px; color: var(--text-muted); font-size: 17px; }
/* ===== 4. Buttons ===== */
.btn-primary, .btn-outline, .btn-light {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 14px 32px; border-radius: 999px; font-weight: 700; font-size: 15px;
  cursor: pointer; transition: var(--transition); letter-spacing: .01em;
  border: 2px solid transparent; gap: 8px; line-height: 1.2;
}
.btn-primary { background: linear-gradient(135deg, #06b6d4, #0891b2); color: #fff; box-shadow: 0 8px 24px rgba(6, 182, 212, .35); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 32px rgba(6, 182, 212, .45); color: #fff; }
.btn-outline { border-color: rgba(255, 255, 255, .7); color: #fff; background: transparent; }
.btn-outline:hover { background: rgba(255, 255, 255, .1); transform: translateY(-2px); color: #fff; }
.btn-light { background: #fff; color: var(--primary-dark); box-shadow: 0 4px 20px rgba(0, 0, 0, .08); }
.btn-light:hover { transform: translateY(-2px); box-shadow: 0 10px 30px rgba(0, 0, 0, .12); color: var(--primary); }
.btn-primary:focus-visible, .btn-outline:focus-visible, .btn-light:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
/* ===== 5. Header / Nav ===== */
.header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(15, 23, 42, .92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, .08);
  height: var(--header-h);
  display: flex; align-items: center;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; width: 100%; }
.logo { display: flex; align-items: center; gap: 10px; }
.logo-icon {
  width: 42px; height: 42px; border-radius: 12px;
  background: linear-gradient(135deg, #22d3ee, #0891b2);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 20px; box-shadow: 0 4px 16px rgba(6, 182, 212, .4);
}
.logo-text { font-size: 22px; font-weight: 800; color: #fff; letter-spacing: .02em; }
.logo-text span { color: var(--accent); }
.nav-menu { display: flex; align-items: center; gap: 26px; }
.nav-link { position: relative; font-size: 15px; font-weight: 600; color: rgba(255, 255, 255, .75); padding: 8px 2px; }
.nav-link::after { content: ""; position: absolute; left: 0; bottom: 0; width: 0; height: 2px; background: var(--accent); border-radius: 2px; transition: var(--transition); }
.nav-link:hover { color: #fff; }
.nav-link:hover::after { width: 100%; }
.nav-link.active { color: #fff; }
.nav-link.active::after { width: 100%; }
.nav-actions { display: flex; align-items: center; gap: 16px; }
.search-box { display: flex; align-items: center; background: rgba(255, 255, 255, .1); border: 1px solid rgba(255, 255, 255, .1); border-radius: 999px; padding: 0 16px; height: 42px; width: 220px; transition: var(--transition); }
.search-box:focus-within { border-color: var(--accent); background: rgba(255, 255, 255, .14); box-shadow: 0 0 0 4px rgba(34, 211, 238, .1); }
.search-box i { color: rgba(255, 255, 255, .6); font-size: 14px; margin-right: 8px; }
.search-box input { flex: 1; color: #fff; background: transparent; font-size: 14px; }
.search-box input::placeholder { color: rgba(255, 255, 255, .4); }
.nav-toggle { display: none; width: 44px; height: 44px; border-radius: 10px; background: rgba(255, 255, 255, .1); color: #fff; font-size: 18px; cursor: pointer; align-items: center; justify-content: center; }
.nav-toggle:hover { background: rgba(255, 255, 255, .2); }
/* ===== 6. Hero ===== */
.hero {
  position: relative;
  min-height: calc(100vh - var(--header-h));
  display: flex; align-items: center;
  background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  color: #fff;
  overflow: hidden;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(15, 23, 42, .94) 0%, rgba(15, 23, 42, .82) 45%, rgba(8, 145, 178, .35) 100%);
  z-index: 1;
}
.hero::after {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(circle at 80% 30%, rgba(6, 182, 212, .2) 0%, transparent 60%);
  z-index: 1;
}
.hero-inner { position: relative; z-index: 2; display: grid; grid-template-columns: 1.1fr .9fr; gap: 60px; align-items: center; padding: 80px 0; }
.hero-content h1 { font-size: clamp(38px, 5.5vw, 62px); font-weight: 900; line-height: 1.15; letter-spacing: -.03em; margin-bottom: 22px; }
.hero-content h1 .highlight {
  background: linear-gradient(135deg, #22d3ee, #818cf8);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-content p { font-size: 18px; line-height: 1.8; color: rgba(255, 255, 255, .75); max-width: 520px; margin-bottom: 36px; }
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-tags { display: flex; gap: 12px; margin-top: 40px; flex-wrap: wrap; }
.hero-tag { font-size: 13px; font-weight: 600; color: rgba(255, 255, 255, .7); background: rgba(255, 255, 255, .08); border: 1px solid rgba(255, 255, 255, .12); padding: 6px 16px; border-radius: 999px; }
.hero-console {
  background: rgba(15, 23, 42, .72);
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  overflow: hidden;
}
.console-header { display: flex; align-items: center; gap: 8px; padding: 16px 20px; border-bottom: 1px solid rgba(255, 255, 255, .08); background: rgba(255, 255, 255, .03); }
.console-dot { width: 12px; height: 12px; border-radius: 50%; }
.console-dot.red { background: #ef4444; }
.console-dot.yellow { background: #f59e0b; }
.console-dot.green { background: #10b981; }
.console-title { margin-left: 12px; font-size: 13px; color: rgba(255, 255, 255, .5); font-family: "SF Mono", "Cascadia Code", Consolas, monospace; }
.console-body { padding: 24px 24px 28px; font-family: "SF Mono", "Cascadia Code", Consolas, monospace; font-size: 14px; line-height: 2.1; }
.console-line { color: rgba(255, 255, 255, .7); }
.console-line .label { color: rgba(255, 255, 255, .4); }
.console-line .val { color: var(--accent); font-weight: 700; }
.console-line.status { color: #34d399; }
.console-line.status i { margin-right: 6px; }
/* ===== 7. Stats ===== */
.stats-band { background: var(--dark); border-bottom: 1px solid var(--border-dark); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; padding: 56px 0; }
.stat-item { text-align: center; padding: 20px 10px; border-radius: var(--radius-md); transition: var(--transition); }
.stat-item:hover { background: rgba(255, 255, 255, .04); transform: translateY(-4px); }
.stat-num { font-size: clamp(30px, 4vw, 46px); font-weight: 900; color: var(--accent); line-height: 1.2; letter-spacing: -.02em; }
.stat-num small { font-size: .5em; font-weight: 700; color: rgba(255, 255, 255, .6); margin-left: 2px; }
.stat-label { font-size: 15px; color: rgba(255, 255, 255, .6); margin-top: 8px; letter-spacing: .04em; }
/* ===== 8. Features ===== */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.feature-card { background: var(--white); border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--border); box-shadow: var(--shadow-sm); transition: var(--transition); }
.feature-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-6px); border-color: rgba(6, 182, 212, .3); }
.feature-img { height: 210px; overflow: hidden; position: relative; }
.feature-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.feature-card:hover .feature-img img { transform: scale(1.05); }
.feature-img::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 50%, rgba(15, 23, 42, .3) 100%); }
.feature-body { padding: 28px; }
.feature-body .feature-icon { width: 48px; height: 48px; border-radius: 14px; background: linear-gradient(135deg, rgba(6, 182, 212, .15), rgba(8, 145, 178, .1)); display: flex; align-items: center; justify-content: center; color: var(--primary); font-size: 20px; margin-bottom: 16px; }
.feature-body h3 { font-size: 20px; font-weight: 800; color: var(--dark); margin-bottom: 10px; letter-spacing: -.01em; }
.feature-body p { font-size: 15px; color: var(--text-muted); line-height: 1.7; }
/* ===== 9. Categories ===== */
.cat-band { background: var(--light-bg-2); }
.cat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.cat-card { position: relative; border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-md); cursor: pointer; transition: var(--transition); display: block; }
.cat-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-6px); }
.cat-card img { width: 100%; height: 280px; object-fit: cover; transition: transform .5s ease; }
.cat-card:hover img { transform: scale(1.06); }
.cat-overlay { position: absolute; inset: 0; background: linear-gradient(180deg, transparent 30%, rgba(15, 23, 42, .85) 100%); display: flex; flex-direction: column; justify-content: flex-end; padding: 28px; z-index: 2; }
.cat-overlay .cat-tag { font-size: 13px; font-weight: 700; color: var(--accent); text-transform: uppercase; letter-spacing: .1em; margin-bottom: 8px; }
.cat-overlay h3 { font-size: 24px; font-weight: 800; color: #fff; margin-bottom: 6px; }
.cat-overlay p { font-size: 14px; color: rgba(255, 255, 255, .75); margin-bottom: 14px; line-height: 1.5; }
.cat-overlay .cat-link { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; font-weight: 700; color: #fff; background: rgba(255, 255, 255, .14); backdrop-filter: blur(8px); padding: 8px 20px; border-radius: 999px; border: 1px solid rgba(255, 255, 255, .18); transition: var(--transition); }
.cat-card:hover .cat-link { background: var(--primary); border-color: var(--primary); transform: translateX(4px); }
/* ===== 10. News / CMS List ===== */
.news-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.news-card { background: var(--white); border-radius: var(--radius-lg); padding: 28px; border: 1px solid var(--border); box-shadow: var(--shadow-sm); transition: var(--transition); display: block; }
.news-card:hover { box-shadow: var(--shadow-md); border-color: rgba(6, 182, 212, .3); transform: translateY(-3px); }
.news-meta { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; }
.news-cat { background: rgba(6, 182, 212, .1); color: var(--primary); font-size: 12px; font-weight: 700; padding: 4px 14px; border-radius: 999px; letter-spacing: .04em; }
.news-date { font-size: 13px; color: var(--text-muted); display: flex; align-items: center; gap: 6px; }
.news-card h3 { font-size: 19px; font-weight: 800; color: var(--dark); line-height: 1.4; margin-bottom: 10px; letter-spacing: -.01em; transition: var(--transition); }
.news-card:hover h3 { color: var(--primary); }
.news-card .news-desc { font-size: 14px; color: var(--text-muted); line-height: 1.65; margin-bottom: 18px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-card .news-link { font-size: 14px; font-weight: 700; color: var(--primary); display: inline-flex; align-items: center; gap: 6px; }
.news-card .news-link i { transition: transform .2s ease; }
.news-card:hover .news-link i { transform: translateX(4px); }
.news-empty { text-align: center; padding: 60px 24px; background: var(--white); border-radius: var(--radius-lg); border: 1px dashed var(--border); color: var(--text-muted); font-size: 16px; grid-column: 1 / -1; }
/* ===== 11. Ranking ===== */
.rank-band { background: var(--dark-2); }
.rank-band .section-header h2 { color: #fff; }
.rank-band .section-header p { color: rgba(255, 255, 255, .6); }
.rank-grid { display: grid; grid-template-columns: 1fr; gap: 14px; max-width: 820px; margin: 0 auto; }
.rank-item { display: flex; align-items: center; gap: 20px; background: rgba(255, 255, 255, .04); border: 1px solid rgba(255, 255, 255, .08); border-radius: var(--radius-md); padding: 16px 24px; transition: var(--transition); }
.rank-item:hover { background: rgba(255, 255, 255, .08); border-color: rgba(34, 211, 238, .3); transform: translateX(6px); }
.rank-num { font-size: 26px; font-weight: 900; color: rgba(255, 255, 255, .3); width: 48px; text-align: center; font-style: italic; letter-spacing: -.03em; }
.rank-item:nth-child(1) .rank-num, .rank-item:nth-child(2) .rank-num, .rank-item:nth-child(3) .rank-num { color: var(--accent); }
.rank-thumb { width: 72px; height: 72px; border-radius: 14px; overflow: hidden; flex-shrink: 0; border: 2px solid rgba(255, 255, 255, .1); }
.rank-thumb img { width: 100%; height: 100%; object-fit: cover; }
.rank-info { flex: 1; }
.rank-info h4 { font-size: 18px; font-weight: 800; color: #fff; margin-bottom: 4px; }
.rank-tags { display: flex; gap: 8px; flex-wrap: wrap; }
.rank-tag { font-size: 12px; color: rgba(255, 255, 255, .6); background: rgba(255, 255, 255, .08); padding: 3px 12px; border-radius: 999px; border: 1px solid rgba(255, 255, 255, .06); }
.rank-score { font-size: 22px; font-weight: 900; color: var(--accent); letter-spacing: -.02em; }
.rank-item:nth-child(n+4) .rank-score { color: rgba(255, 255, 255, .5); }
/* ===== 12. Steps ===== */
.steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; }
.step-card { text-align: center; padding: 36px 24px; background: var(--white); border-radius: var(--radius-lg); border: 1px solid var(--border); box-shadow: var(--shadow-sm); transition: var(--transition); position: relative; }
.step-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.step-num { width: 56px; height: 56px; margin: 0 auto 20px; border-radius: 20px; background: linear-gradient(135deg, var(--primary-light), var(--primary)); display: flex; align-items: center; justify-content: center; color: #fff; font-size: 22px; font-weight: 900; box-shadow: 0 8px 20px rgba(6, 182, 212, .3); }
.step-card h3 { font-size: 18px; font-weight: 800; color: var(--dark); margin-bottom: 12px; }
.step-card p { font-size: 14px; color: var(--text-muted); line-height: 1.65; }
.step-line { position: absolute; top: 56px; left: calc(50% + 44px); width: calc(100% - 44px); height: 2px; background: linear-gradient(90deg, rgba(6, 182, 212, .4), rgba(129, 140, 248, .1)); z-index: 0; }
.step-card:last-child .step-line { display: none; }
/* ===== 13. FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { background: var(--white); border-radius: var(--radius-md); border: 1px solid var(--border); margin-bottom: 16px; overflow: hidden; box-shadow: var(--shadow-sm); transition: var(--transition); }
.faq-item.active { border-color: rgba(6, 182, 212, .35); box-shadow: var(--shadow-md); }
.faq-question { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 22px 28px; cursor: pointer; font-size: 16px; font-weight: 700; color: var(--dark); transition: var(--transition); }
.faq-question:hover { color: var(--primary); }
.faq-question .icon { width: 32px; height: 32px; border-radius: 50%; background: rgba(6, 182, 212, .1); display: flex; align-items: center; justify-content: center; color: var(--primary); font-size: 14px; flex-shrink: 0; transition: var(--transition); }
.faq-item.active .faq-question .icon { background: var(--primary); color: #fff; transform: rotate(45deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height .35s ease; padding: 0 28px; }
.faq-item.active .faq-answer { max-height: 200px; padding: 0 28px 24px; }
.faq-answer p { font-size: 15px; color: var(--text-muted); line-height: 1.75; }
/* ===== 14. CTA ===== */
.cta-band { background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat; position: relative; }
.cta-band::before { content: ""; position: absolute; inset: 0; background: linear-gradient(135deg, rgba(15, 23, 42, .92), rgba(8, 145, 178, .5)); }
.cta-inner { position: relative; z-index: 2; text-align: center; padding: 100px 24px; }
.cta-inner h2 { font-size: clamp(30px, 4vw, 46px); font-weight: 900; color: #fff; margin-bottom: 18px; letter-spacing: -.02em; }
.cta-inner p { max-width: 600px; margin: 0 auto 36px; font-size: 18px; color: rgba(255, 255, 255, .7); line-height: 1.7; }
.cta-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
/* ===== 15. Footer ===== */
.footer { background: var(--dark); padding: 72px 0 110px; color: rgba(255, 255, 255, .6); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; }
.footer-brand .logo-text { font-size: 24px; }
.footer-brand p { font-size: 14px; line-height: 1.75; margin-top: 16px; max-width: 360px; }
.footer-col h4 { font-size: 16px; font-weight: 700; color: #fff; margin-bottom: 20px; }
.footer-col ul li { margin-bottom: 12px; }
.footer-col ul a { font-size: 14px; color: rgba(255, 255, 255, .55); transition: var(--transition); }
.footer-col ul a:hover { color: var(--accent); padding-left: 6px; }
.footer-bottom { border-top: 1px solid var(--border-dark); margin-top: 56px; padding-top: 24px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px; font-size: 13px; }
.footer-bottom a { color: rgba(255, 255, 255, .4); }
.footer-bottom a:hover { color: var(--accent); }
/* ===== 16. Mobile Tab Bar ===== */
.mobile-tabbar { display: none; position: fixed; bottom: 0; left: 0; right: 0; height: var(--tabbar-h); background: rgba(15, 23, 42, .97); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); border-top: 1px solid rgba(255, 255, 255, .08); z-index: 200; }
.mobile-tabbar-inner { display: flex; height: 100%; }
.mobile-tab { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 4px; color: rgba(255, 255, 255, .5); font-size: 11px; font-weight: 600; transition: var(--transition); }
.mobile-tab i { font-size: 20px; transition: var(--transition); }
.mobile-tab:hover, .mobile-tab.active { color: var(--accent); }
.mobile-tab.active i { transform: translateY(-2px); }
.mobile-tab.active::before { content: ""; position: absolute; top: 0; width: 32px; height: 3px; background: var(--accent); border-radius: 0 0 4px 4px; }
.mobile-tab { position: relative; }
/* ===== 17. Responsive ===== */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 48px; }
  .hero-console { max-width: 560px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .cat-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .step-line { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .search-box { display: none; }
}
@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .header { height: 64px; }
  .nav-menu, .nav-actions .search-box { display: none; }
  .nav-toggle { display: flex; }
  .nav-menu.open { display: flex; position: absolute; top: 64px; left: 0; right: 0; background: var(--dark); flex-direction: column; padding: 24px; gap: 16px; border-bottom: 1px solid var(--border-dark); box-shadow: var(--shadow-drawer); }
  .nav-link { font-size: 18px; padding: 12px 0; width: 100%; text-align: center; }
  .nav-link::after { display: none; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .news-grid { grid-template-columns: 1fr; }
  .cta-inner { padding: 72px 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer { padding-bottom: 140px; }
  .mobile-tabbar { display: block; }
  .hero { min-height: auto; }
  .hero-inner { padding: 60px 0; }
  .step-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  .container { padding: 0 18px; }
  .hero-btns .btn-primary, .hero-btns .btn-outline { width: 100%; }
  .feature-grid { grid-template-columns: 1fr; }
  .stat-item { padding: 14px 6px; }
  .rank-item { flex-wrap: wrap; gap: 14px; }
  .rank-score { margin-left: auto; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .cta-btns .btn-primary, .cta-btns .btn-light { width: 100%; }
  .faq-question { font-size: 15px; padding: 20px 20px; }
  .faq-answer { padding: 0 20px; }
  .faq-item.active .faq-answer { padding: 0 20px 20px; }
}

/* roulang page: category1 */
:root{
      --primary: #2563eb;
      --primary-dark: #1e40af;
      --accent: #f97316;
      --accent-light: #fb923c;
      --bg: #f4f6fb;
      --bg-soft: #f8fafc;
      --bg-dark: #0b1120;
      --bg-dark-2: #111a2e;
      --surface: #ffffff;
      --text: #0f172a;
      --text-soft: #475569;
      --text-muted: #94a3b8;
      --border: #e2e8f0;
      --radius: 16px;
      --radius-lg: 24px;
      --radius-sm: 10px;
      --shadow: 0 8px 30px rgba(2, 6, 23, 0.08);
      --shadow-lg: 0 20px 45px rgba(2, 6, 23, 0.12);
      --transition: 0.25s ease;
      --header-h: 72px;
      --container: 1200px;
    }

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

    html{
      scroll-behavior: smooth;
    }

    body{
      font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
      background: var(--bg);
      color: var(--text);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }

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

    a{
      text-decoration: none;
      color: inherit;
      transition: color var(--transition);
    }

    ul{
      list-style: none;
    }

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

    input{
      font-family: inherit;
      outline: none;
    }

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

    /* ===== Buttons ===== */
    .btn-primary,
    .btn-light,
    .btn-outline{
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      font-weight: 700;
      font-size: 16px;
      padding: 14px 32px;
      border-radius: 999px;
      transition: all var(--transition);
      line-height: 1.4;
    }

    .btn-primary{
      background: var(--accent);
      color: #fff;
      box-shadow: 0 8px 24px rgba(249, 115, 22, 0.35);
    }

    .btn-primary:hover{
      background: #ea580c;
      transform: translateY(-2px);
      box-shadow: 0 12px 32px rgba(249, 115, 22, 0.45);
    }

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

    .btn-light{
      background: #fff;
      color: var(--text);
      box-shadow: 0 8px 24px rgba(2, 6, 23, 0.12);
    }

    .btn-light:hover{
      transform: translateY(-2px);
      box-shadow: 0 12px 32px rgba(2, 6, 23, 0.18);
    }

    .btn-outline{
      border: 2px solid var(--border);
      color: var(--text);
      background: transparent;
    }

    .btn-outline:hover{
      border-color: var(--primary);
      color: var(--primary);
      background: rgba(37, 99, 235, 0.05);
    }

    .btn-primary:focus-visible,
    .btn-light:focus-visible,
    .btn-outline:focus-visible{
      outline: 3px solid rgba(37, 99, 235, 0.4);
      outline-offset: 2px;
    }

    /* ===== Header ===== */
    .header{
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.88);
      backdrop-filter: blur(18px);
      border-bottom: 1px solid var(--border);
    }

    .header-inner{
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: var(--header-h);
      gap: 24px;
    }

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

    .logo-icon{
      width: 42px;
      height: 42px;
      border-radius: 12px;
      background: linear-gradient(135deg, var(--accent), #fbbf24);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 20px;
      box-shadow: 0 6px 18px rgba(249, 115, 22, 0.35);
    }

    .logo-text{
      font-size: 22px;
      font-weight: 900;
      color: var(--text);
      letter-spacing: 0.5px;
    }

    .logo-text span{
      color: var(--accent);
    }

    .nav-menu{
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .nav-link{
      position: relative;
      padding: 10px 16px;
      font-weight: 500;
      font-size: 15px;
      color: var(--text-soft);
      border-radius: 999px;
    }

    .nav-link:hover{
      color: var(--text);
      background: var(--bg-soft);
    }

    .nav-link.active{
      color: var(--primary);
      background: rgba(37, 99, 235, 0.08);
      font-weight: 700;
    }

    .nav-link.active::after{
      content: "";
      position: absolute;
      left: 16px;
      right: 16px;
      bottom: 4px;
      height: 3px;
      border-radius: 3px;
      background: var(--primary);
    }

    .nav-actions{
      display: flex;
      align-items: center;
      gap: 14px;
      flex-shrink: 0;
    }

    .search-box{
      display: flex;
      align-items: center;
      gap: 8px;
      background: var(--bg-soft);
      border: 1px solid var(--border);
      border-radius: 999px;
      padding: 8px 16px;
      width: 220px;
      transition: border-color var(--transition), box-shadow var(--transition);
    }

    .search-box i{
      color: var(--text-muted);
      font-size: 14px;
    }

    .search-box input{
      border: none;
      background: transparent;
      font-size: 14px;
      width: 100%;
      color: var(--text);
    }

    .search-box input::placeholder{
      color: var(--text-muted);
    }

    .search-box:focus-within{
      border-color: var(--primary);
      box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
    }

    .nav-toggle{
      display: none;
      width: 42px;
      height: 42px;
      border-radius: 10px;
      background: var(--bg-soft);
      border: 1px solid var(--border);
      color: var(--text);
      font-size: 18px;
      align-items: center;
      justify-content: center;
    }

    /* ===== Mobile Bottom Tab ===== */
    .bottom-tab-nav{
      display: none;
      position: fixed;
      bottom: 0;
      left: 0;
      right: 0;
      z-index: 200;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(18px);
      border-top: 1px solid var(--border);
      padding: 6px 0 calc(6px + env(safe-area-inset-bottom));
      box-shadow: 0 -8px 30px rgba(2, 6, 23, 0.08);
    }

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

    .tab-item{
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 4px;
      padding: 6px 4px;
      border-radius: 12px;
      color: var(--text-muted);
      font-size: 11px;
      font-weight: 500;
      transition: color var(--transition);
    }

    .tab-item i{
      font-size: 19px;
      line-height: 1;
    }

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

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

    /* ===== Hero Banner ===== */
    .page-hero{
      position: relative;
      padding: 90px 0 100px;
      background-image: url('/assets/images/backpic/back-1.png');
      background-size: cover;
      background-position: center;
      color: #fff;
      overflow: hidden;
    }

    .page-hero::before{
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(120deg, rgba(11, 17, 32, 0.92) 20%, rgba(11, 17, 32, 0.6) 60%, rgba(37, 99, 235, 0.35) 100%);
    }

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

    .breadcrumb{
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 8px;
      font-size: 14px;
      color: rgba(255, 255, 255, 0.7);
      margin-bottom: 22px;
    }

    .breadcrumb a{
      color: rgba(255, 255, 255, 0.85);
    }

    .breadcrumb a:hover{
      color: #fff;
    }

    .breadcrumb i{
      font-size: 11px;
      opacity: 0.6;
    }

    .page-hero .tagline{
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(255, 255, 255, 0.12);
      border: 1px solid rgba(255, 255, 255, 0.25);
      backdrop-filter: blur(6px);
      padding: 6px 16px;
      border-radius: 999px;
      font-size: 14px;
      font-weight: 500;
      color: rgba(255, 255, 255, 0.95);
      margin-bottom: 20px;
    }

    .page-hero h1{
      font-size: 48px;
      font-weight: 900;
      line-height: 1.25;
      letter-spacing: 1px;
      max-width: 640px;
      margin-bottom: 18px;
    }

    .page-hero h1 em{
      font-style: normal;
      color: #fbbf24;
    }

    .page-hero .hero-desc{
      font-size: 17px;
      line-height: 1.8;
      color: rgba(255, 255, 255, 0.85);
      max-width: 600px;
      margin-bottom: 32px;
    }

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

    .hero-badge-row{
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 40px;
    }

    .hero-badge{
      background: rgba(255, 255, 255, 0.1);
      border: 1px solid rgba(255, 255, 255, 0.18);
      backdrop-filter: blur(6px);
      padding: 8px 18px;
      border-radius: 999px;
      font-size: 13px;
      color: rgba(255, 255, 255, 0.9);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }

    .hero-badge i{
      color: #fbbf24;
    }

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

    .section-alt{
      background: var(--surface);
    }

    .section-head{
      display: flex;
      align-items: flex-end;
      justify-content: space-between;
      gap: 20px;
      margin-bottom: 42px;
    }

    .section-head .left{
      max-width: 720px;
    }

    .section-tag{
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      font-weight: 700;
      color: var(--primary);
      background: rgba(37, 99, 235, 0.08);
      padding: 6px 16px;
      border-radius: 999px;
      margin-bottom: 14px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .section-title{
      font-size: 34px;
      font-weight: 900;
      line-height: 1.35;
      margin-bottom: 12px;
    }

    .section-desc{
      font-size: 16px;
      color: var(--text-soft);
      line-height: 1.8;
    }

    .section-link{
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-weight: 700;
      color: var(--primary);
      padding: 10px 20px;
      border-radius: 999px;
      border: 1px solid var(--border);
      background: var(--surface);
      transition: all var(--transition);
      white-space: nowrap;
    }

    .section-link:hover{
      background: var(--primary);
      color: #fff;
      border-color: var(--primary);
    }

    /* ===== Intro Split ===== */
    .intro-grid{
      display: grid;
      grid-template-columns: 1.05fr 0.95fr;
      gap: 60px;
      align-items: center;
    }

    .intro-visual{
      position: relative;
    }

    .intro-visual .main-img{
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-lg);
      aspect-ratio: 4 / 3;
      object-fit: cover;
      width: 100%;
    }

    .intro-card{
      position: absolute;
      bottom: -20px;
      left: 30px;
      background: var(--surface);
      border-radius: var(--radius);
      box-shadow: var(--shadow-lg);
      padding: 18px 24px;
      display: flex;
      align-items: center;
      gap: 14px;
    }

    .intro-card i{
      width: 44px;
      height: 44px;
      border-radius: 12px;
      background: rgba(37, 99, 235, 0.12);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
    }

    .intro-card .intro-card-num{
      font-size: 20px;
      font-weight: 900;
      line-height: 1.2;
    }

    .intro-card .intro-card-label{
      font-size: 13px;
      color: var(--text-soft);
    }

    .intro-content h2{
      font-size: 30px;
      font-weight: 900;
      line-height: 1.4;
      margin-bottom: 16px;
    }

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

    .intro-points{
      margin: 24px 0 8px;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 14px;
    }

    .intro-point{
      display: flex;
      align-items: center;
      gap: 10px;
      background: var(--bg-soft);
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      padding: 12px 14px;
      font-size: 14px;
      font-weight: 500;
    }

    .intro-point i{
      color: var(--accent);
    }

    /* ===== Tags ===== */
    .tag-cloud{
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      justify-content: center;
      max-width: 800px;
      margin: 0 auto;
    }

    .tag-item-badge{
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--surface);
      border: 1px solid var(--border);
      padding: 10px 22px;
      border-radius: 999px;
      font-size: 14px;
      font-weight: 500;
      color: var(--text-soft);
      transition: all var(--transition);
      box-shadow: 0 2px 8px rgba(2, 6, 23, 0.04);
    }

    .tag-item-badge:hover{
      border-color: var(--primary);
      color: var(--primary);
      background: rgba(37, 99, 235, 0.05);
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(37, 99, 235, 0.12);
    }

    .tag-item-badge i{
      color: var(--accent);
      font-size: 13px;
    }

    /* ===== Guide Cards ===== */
    .guide-grid{
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

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

    .guide-card:hover{
      box-shadow: var(--shadow-lg);
      transform: translateY(-6px);
      border-color: rgba(37, 99, 235, 0.2);
    }

    .guide-card-cover{
      position: relative;
      aspect-ratio: 16 / 10;
      overflow: hidden;
    }

    .guide-card-cover img{
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

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

    .guide-card-cover::after{
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, transparent 60%, rgba(2, 6, 23, 0.45));
      pointer-events: none;
    }

    .guide-card-cat{
      position: absolute;
      top: 14px;
      left: 14px;
      z-index: 2;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(6px);
      color: var(--text);
      font-size: 12px;
      font-weight: 700;
      padding: 5px 14px;
      border-radius: 999px;
      box-shadow: 0 4px 12px rgba(2, 6, 23, 0.12);
    }

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

    .guide-card-body h3{
      font-size: 18px;
      font-weight: 900;
      line-height: 1.5;
      margin-bottom: 10px;
    }

    .guide-card-body h3 a{
      color: var(--text);
    }

    .guide-card-body h3 a:hover{
      color: var(--primary);
    }

    .guide-card-body p{
      font-size: 14px;
      color: var(--text-soft);
      line-height: 1.8;
      margin-bottom: 18px;
      flex: 1;
    }

    .guide-card-meta{
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-top: 1px solid var(--border);
      padding-top: 14px;
      font-size: 13px;
      color: var(--text-muted);
    }

    .guide-card-meta .meta-l{
      display: flex;
      align-items: center;
      gap: 14px;
    }

    .guide-card-meta i{
      margin-right: 5px;
      font-size: 12px;
    }

    .guide-card-meta .hot{
      color: var(--accent);
      font-weight: 700;
    }

    /* ===== Stats ===== */
    .stats-section{
      position: relative;
      background-image: url('/assets/images/backpic/back-2.png');
      background-size: cover;
      background-position: center;
      padding: 90px 0;
      color: #fff;
    }

    .stats-section::before{
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(11, 17, 32, 0.94), rgba(37, 99, 235, 0.55));
    }

    .stats-section .container{
      position: relative;
      z-index: 2;
    }

    .stats-grid{
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      text-align: center;
    }

    .stat-item{
      padding: 24px 16px;
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--radius-lg);
      backdrop-filter: blur(8px);
      transition: all var(--transition);
    }

    .stat-item:hover{
      background: rgba(255, 255, 255, 0.14);
      transform: translateY(-4px);
    }

    .stat-item .num{
      font-size: 42px;
      font-weight: 900;
      line-height: 1.2;
      background: linear-gradient(90deg, #fff, #fbbf24);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
      margin-bottom: 6px;
    }

    .stat-item .label{
      font-size: 15px;
      color: rgba(255, 255, 255, 0.85);
    }

    /* ===== Topic Cards ===== */
    .topic-grid{
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .topic-card{
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      min-height: 320px;
      display: flex;
      align-items: flex-end;
      box-shadow: var(--shadow);
      transition: all var(--transition);
    }

    .topic-card:hover{
      box-shadow: var(--shadow-lg);
      transform: translateY(-6px);
    }

    .topic-card img{
      position: absolute;
      inset: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .topic-card::after{
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(2, 6, 23, 0.1) 0%, rgba(2, 6, 23, 0.85) 78%);
    }

    .topic-card-content{
      position: relative;
      z-index: 2;
      padding: 28px;
      color: #fff;
      width: 100%;
    }

    .topic-card-content .topic-icon{
      width: 46px;
      height: 46px;
      border-radius: 12px;
      background: rgba(255, 255, 255, 0.18);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 19px;
      margin-bottom: 14px;
      backdrop-filter: blur(6px);
    }

    .topic-card-content h3{
      font-size: 20px;
      font-weight: 900;
      margin-bottom: 8px;
    }

    .topic-card-content p{
      font-size: 14px;
      color: rgba(255, 255, 255, 0.85);
      line-height: 1.7;
      margin-bottom: 16px;
    }

    .topic-card-link{
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 14px;
      font-weight: 700;
      color: #fbbf24;
    }

    /* ===== FAQ ===== */
    .faq-wrap{
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-item{
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      margin-bottom: 16px;
      transition: box-shadow var(--transition);
    }

    .faq-item:hover{
      box-shadow: var(--shadow);
    }

    .faq-question{
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 22px 26px;
      font-size: 17px;
      font-weight: 700;
      color: var(--text);
      text-align: left;
      background: transparent;
      border-radius: var(--radius);
    }

    .faq-question .icon{
      flex-shrink: 0;
      width: 30px;
      height: 30px;
      border-radius: 50%;
      background: rgba(37, 99, 235, 0.1);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
      transition: all var(--transition);
    }

    .faq-item.open .faq-question .icon{
      background: var(--primary);
      color: #fff;
      transform: rotate(45deg);
    }

    .faq-answer{
      display: none;
      padding: 0 26px 24px;
      color: var(--text-soft);
      font-size: 15px;
      line-height: 1.9;
    }

    .faq-answer p{
      margin-bottom: 8px;
    }

    .faq-item.open .faq-answer{
      display: block;
    }

    /* ===== CTA ===== */
    .cta-section{
      padding: 90px 0;
      background: linear-gradient(135deg, #0b1120 0%, #16224a 60%, #1e3a8a 100%);
      position: relative;
      overflow: hidden;
    }

    .cta-section::before{
      content: "";
      position: absolute;
      right: -80px;
      top: -80px;
      width: 320px;
      height: 320px;
      border-radius: 50%;
      background: rgba(249, 115, 22, 0.2);
      filter: blur(70px);
    }

    .cta-section::after{
      content: "";
      position: absolute;
      left: -40px;
      bottom: -60px;
      width: 260px;
      height: 260px;
      border-radius: 50%;
      background: rgba(37, 99, 235, 0.35);
      filter: blur(80px);
    }

    .cta-inner{
      position: relative;
      z-index: 2;
      text-align: center;
      color: #fff;
      max-width: 700px;
      margin: 0 auto;
    }

    .cta-inner h2{
      font-size: 38px;
      font-weight: 900;
      line-height: 1.35;
      margin-bottom: 16px;
    }

    .cta-inner p{
      font-size: 17px;
      color: rgba(255, 255, 255, 0.85);
      margin-bottom: 32px;
    }

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

    /* ===== Footer ===== */
    .footer{
      background: var(--bg-dark);
      color: rgba(255, 255, 255, 0.8);
      padding: 70px 0 30px;
    }

    .footer-grid{
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr;
      gap: 48px;
      padding-bottom: 40px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .footer-brand .logo{
      margin-bottom: 18px;
    }

    .footer-brand .logo-text{
      color: #fff;
    }

    .footer-brand p{
      font-size: 14px;
      line-height: 1.9;
      color: rgba(255, 255, 255, 0.65);
      max-width: 340px;
    }

    .footer-col h4{
      color: #fff;
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 20px;
    }

    .footer-col ul li{
      margin-bottom: 12px;
    }

    .footer-col ul a{
      color: rgba(255, 255, 255, 0.65);
      font-size: 14px;
    }

    .footer-col ul a:hover{
      color: #fbbf24;
    }

    .footer-bottom{
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
      padding-top: 28px;
      font-size: 14px;
      color: rgba(255, 255, 255, 0.5);
    }

    .footer-bottom a{
      color: rgba(255, 255, 255, 0.8);
    }

    .footer-bottom a:hover{
      color: #fbbf24;
    }

    /* ===== Responsive ===== */
    @media (max-width: 1024px){
      .guide-grid{
        grid-template-columns: repeat(2, 1fr);
      }

      .topic-grid{
        gap: 20px;
      }

      .topic-card{
        min-height: 280px;
      }

      .section{
        padding: 64px 0;
      }
    }

    @media (max-width: 768px){
      .header-inner{
        height: 62px;
      }

      .nav-menu{
        position: absolute;
        top: 62px;
        left: 0;
        right: 0;
        background: var(--surface);
        border-bottom: 1px solid var(--border);
        flex-direction: column;
        align-items: stretch;
        padding: 14px 20px 20px;
        gap: 6px;
        display: none;
        box-shadow: 0 20px 30px rgba(2, 6, 23, 0.08);
      }

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

      .nav-link{
        padding: 14px 18px;
        font-size: 16px;
      }

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

      .search-box{
        display: none;
      }

      .nav-toggle{
        display: flex;
      }

      .bottom-tab-nav{
        display: block;
      }

      body{
        padding-bottom: 68px;
      }

      .page-hero{
        padding: 56px 0 70px;
      }

      .page-hero h1{
        font-size: 32px;
      }

      .hero-desc{
        font-size: 15px;
      }

      .intro-grid{
        grid-template-columns: 1fr;
        gap: 48px;
      }

      .intro-card{
        left: 16px;
        bottom: -14px;
        padding: 14px 18px;
      }

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

      .section-head{
        flex-direction: column;
        align-items: flex-start;
        gap: 14px;
      }

      .guide-grid{
        grid-template-columns: 1fr;
        gap: 20px;
      }

      .topic-grid{
        grid-template-columns: 1fr;
        gap: 20px;
      }

      .stats-grid{
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
      }

      .stat-item .num{
        font-size: 32px;
      }

      .cta-inner h2{
        font-size: 28px;
      }

      .footer-grid{
        grid-template-columns: 1fr;
        gap: 36px;
      }

      .footer-bottom{
        flex-direction: column;
        align-items: flex-start;
      }
    }

    @media (max-width: 520px){
      .container{
        padding: 0 16px;
      }

      .logo-text{
        font-size: 19px;
      }

      .logo-icon{
        width: 36px;
        height: 36px;
        font-size: 17px;
      }

      .nav-actions .btn-primary{
        display: none;
      }

      .page-hero h1{
        font-size: 26px;
      }

      .page-hero .tagline{
        font-size: 12px;
        padding: 5px 12px;
      }

      .hero-buttons .btn-primary,
      .hero-buttons .btn-light{
        padding: 12px 22px;
        font-size: 15px;
      }

      .hero-badge-row{
        gap: 8px;
      }

      .hero-badge{
        padding: 6px 14px;
        font-size: 12px;
      }

      .intro-points{
        grid-template-columns: 1fr;
      }

      .section-title{
        font-size: 23px;
      }

      .faq-question{
        padding: 18px 18px;
        font-size: 15px;
      }

      .faq-answer{
        padding: 0 18px 18px;
        font-size: 14px;
      }

      .stats-grid{
        grid-template-columns: 1fr 1fr;
        gap: 12px;
      }

      .stat-item{
        padding: 16px 10px;
      }

      .stat-item .num{
        font-size: 28px;
      }

      .cta-buttons .btn-light{
        width: 100%;
      }

      .footer-bottom{
        align-items: center;
        text-align: center;
        justify-content: center;
      }
    }

/* roulang page: article */
:root {
            --primary: #6366f1;
            --primary-dark: #4f46e5;
            --primary-light: #818cf8;
            --accent: #22d3ee;
            --accent-2: #34d399;
            --bg: #0b0f1a;
            --bg-deep: #080c14;
            --bg-soft: #121a2a;
            --bg-card: rgba(255, 255, 255, 0.04);
            --text: #f3f4f6;
            --text-weak: #9ca3af;
            --text-muted: #6b7280;
            --border: rgba(255, 255, 255, 0.1);
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 24px 60px rgba(79, 70, 229, 0.25);
            --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color 0.25s ease;
        }

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

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

        button,
        input {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 28px;
        }

        /* Header */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(11, 15, 26, 0.82);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border);
            transition: background 0.3s ease, box-shadow 0.3s ease;
        }

        .header.scrolled {
            background: rgba(8, 12, 20, 0.95);
            box-shadow: var(--shadow);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 76px;
            gap: 24px;
        }

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

        .logo-icon {
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            box-shadow: 0 8px 24px rgba(99, 102, 241, 0.4);
        }

        .logo-text {
            font-size: 22px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .logo-text span {
            color: var(--accent);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 1;
            justify-content: center;
        }

        .nav-link {
            padding: 10px 18px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-weak);
            white-space: nowrap;
            transition: all 0.25s ease;
            position: relative;
        }

        .nav-link:hover {
            color: var(--text);
            background: rgba(255, 255, 255, 0.06);
        }

        .nav-link.active {
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            box-shadow: 0 6px 20px rgba(99, 102, 241, 0.3);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
        }

        .search-box {
            display: flex;
            align-items: center;
            gap: 10px;
            background: rgba(255, 255, 255, 0.07);
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: 8px 18px;
            color: var(--text-weak);
            transition: border-color 0.3s ease, background 0.3s ease;
        }

        .search-box:focus-within {
            border-color: var(--primary-light);
            background: rgba(255, 255, 255, 0.1);
        }

        .search-box input {
            background: transparent;
            border: none;
            color: var(--text);
            font-size: 14px;
            min-width: 130px;
        }

        .search-box input::placeholder {
            color: var(--text-muted);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            padding: 12px 28px;
            border-radius: 999px;
            border: none;
            cursor: pointer;
            white-space: nowrap;
            transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
            box-shadow: 0 10px 30px rgba(99, 102, 241, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 16px 40px rgba(99, 102, 241, 0.45);
            color: #fff;
        }

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

        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: rgba(255, 255, 255, 0.08);
            color: var(--text);
            font-size: 18px;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            border: 1px solid var(--border);
        }

        /* Main */
        .main {
            min-height: 70vh;
        }

        /* Article Hero */
        .article-hero {
            padding: 170px 0 70px;
            background: linear-gradient(rgba(11, 15, 26, 0.78), rgba(11, 15, 26, 0.92)), url('/assets/images/backpic/back-1.png') center / cover no-repeat;
            border-bottom: 1px solid var(--border);
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 14px;
            color: var(--text-weak);
            margin-bottom: 28px;
        }

        .breadcrumb a {
            color: var(--text-weak);
        }

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

        .breadcrumb i {
            font-size: 10px;
            opacity: 0.6;
        }

        .breadcrumb .current {
            color: var(--text);
            font-weight: 500;
            max-width: 260px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .article-head-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 20px;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-size: 13px;
            font-weight: 600;
            border-radius: 999px;
            box-shadow: 0 4px 14px rgba(99, 102, 241, 0.3);
        }

        .badge-soft {
            background: rgba(255, 255, 255, 0.1);
            box-shadow: none;
            color: var(--text);
            font-weight: 500;
        }

        .article-head h1 {
            font-size: 38px;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 18px;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #fff 30%, rgba(255, 255, 255, 0.75));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .article-desc {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.75);
            max-width: 720px;
            line-height: 1.8;
        }

        /* Article Layout */
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
            padding: 54px 0 64px;
        }

        .article-body {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 48px;
            font-size: 16px;
            line-height: 1.95;
            color: #d6dbe6;
        }

        .article-body h2,
        .article-body h3,
        .article-body h4 {
            color: var(--text);
            margin-top: 34px;
            margin-bottom: 16px;
            font-weight: 700;
            line-height: 1.4;
        }

        .article-body h2 {
            font-size: 26px;
            border-left: 4px solid var(--primary);
            padding-left: 16px;
        }

        .article-body h3 {
            font-size: 21px;
        }

        .article-body p {
            margin-bottom: 18px;
        }

        .article-body a {
            color: var(--accent);
            border-bottom: 1px solid rgba(34, 211, 238, 0.3);
        }

        .article-body a:hover {
            color: var(--accent-2);
            border-bottom-color: var(--accent-2);
        }

        .article-body ul,
        .article-body ol {
            margin: 16px 0 24px;
            padding-left: 28px;
        }

        .article-body ul {
            list-style: square;
        }

        .article-body li {
            margin-bottom: 8px;
        }

        .article-body img {
            border-radius: 14px;
            margin: 24px 0;
            box-shadow: var(--shadow);
        }

        .article-body blockquote {
            border-left: 4px solid var(--primary-light);
            background: rgba(99, 102, 241, 0.08);
            padding: 18px 24px;
            margin: 24px 0;
            border-radius: 0 14px 14px 0;
            color: var(--text);
            font-style: italic;
        }

        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            font-size: 15px;
            border-radius: 10px;
            overflow: hidden;
        }

        .article-body th,
        .article-body td {
            padding: 12px 16px;
            border: 1px solid var(--border);
            text-align: left;
        }

        .article-body th {
            background: rgba(99, 102, 241, 0.15);
            font-weight: 600;
            color: var(--text);
        }

        .article-body tr:nth-child(even) td {
            background: rgba(255, 255, 255, 0.03);
        }

        .article-body pre,
        .article-body code {
            font-family: "SF Mono", "Fira Code", Consolas, monospace;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 8px;
        }

        .article-body code {
            padding: 2px 8px;
            font-size: 14px;
        }

        .article-body pre {
            padding: 20px;
            overflow-x: auto;
            margin: 24px 0;
            border: 1px solid var(--border);
        }

        .article-body pre code {
            padding: 0;
            background: transparent;
        }

        .article-share {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 36px;
            padding-top: 28px;
            border-top: 1px solid var(--border);
            font-size: 15px;
            color: var(--text-weak);
        }

        .article-share a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: rgba(255, 255, 255, 0.07);
            color: var(--text-weak);
            font-size: 16px;
            border: 1px solid var(--border);
            transition: all 0.25s ease;
        }

        .article-share a:hover {
            color: #fff;
            background: var(--primary);
            border-color: var(--primary);
            transform: translateY(-3px);
            box-shadow: 0 8px 24px rgba(99, 102, 241, 0.3);
        }

        /* Sidebar */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .side-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 26px;
            transition: border-color 0.3s ease, background 0.3s ease;
        }

        .side-card:hover {
            border-color: rgba(99, 102, 241, 0.4);
            background: rgba(255, 255, 255, 0.06);
        }

        .side-card h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 18px;
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text);
        }

        .side-card h3 i {
            color: var(--primary-light);
        }

        .side-card ul {
            list-style: none;
        }

        .side-card li {
            margin-bottom: 14px;
        }

        .side-card li:last-child {
            margin-bottom: 0;
        }

        .side-card ul li a {
            color: var(--text-weak);
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 15px;
            transition: color 0.25s ease, padding-left 0.25s ease;
        }

        .side-card ul li a:hover {
            color: var(--accent);
            padding-left: 6px;
        }

        .side-card ul li a i {
            font-size: 12px;
            color: var(--primary-light);
        }

        .side-tip {
            background: linear-gradient(135deg, rgba(99, 102, 241, 0.15), rgba(34, 211, 238, 0.1));
            border: 1px solid rgba(99, 102, 241, 0.3);
            border-radius: var(--radius);
            padding: 24px;
            text-align: center;
        }

        .side-tip i {
            font-size: 30px;
            color: var(--primary-light);
            margin-bottom: 12px;
        }

        .side-tip p {
            font-size: 14px;
            color: var(--text-weak);
            margin-bottom: 16px;
            line-height: 1.7;
        }

        .side-tip .btn-primary {
            font-size: 13px;
            padding: 10px 22px;
        }

        /* Related Articles */
        .related-section {
            padding: 60px 0;
            background: var(--bg-deep);
            border-top: 1px solid var(--border);
        }

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

        .section-head h2 {
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }

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

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

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

        .article-card:hover {
            transform: translateY(-6px);
            border-color: rgba(99, 102, 241, 0.4);
            box-shadow: var(--shadow-hover);
        }

        .article-cover {
            position: relative;
            display: block;
            overflow: hidden;
            aspect-ratio: 16 / 10;
        }

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

        .article-card:hover .article-cover img {
            transform: scale(1.06);
        }

        .article-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            padding: 5px 14px;
            border-radius: 999px;
            box-shadow: 0 4px 14px rgba(0, 0, 0, 0.3);
        }

        .article-info {
            padding: 22px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .article-info h3 {
            font-size: 17px;
            font-weight: 700;
            line-height: 1.5;
            margin-bottom: 10px;
        }

        .article-info h3 a {
            color: var(--text);
        }

        .article-info h3 a:hover {
            color: var(--accent);
        }

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

        .article-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 13px;
            color: var(--text-muted);
            border-top: 1px solid var(--border);
            padding-top: 14px;
        }

        .article-meta i {
            margin-right: 4px;
        }

        /* Stats */
        .stats-section {
            padding: 70px 0;
            background: linear-gradient(135deg, rgba(99, 102, 241, 0.12), rgba(34, 211, 238, 0.06));
            border-top: 1px solid var(--border);
        }

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

        .stat-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 36px 24px;
            text-align: center;
            transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
        }

        .stat-card:hover {
            transform: translateY(-4px);
            border-color: rgba(99, 102, 241, 0.5);
            box-shadow: var(--shadow-hover);
        }

        .stat-card strong {
            display: block;
            font-size: 36px;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary-light), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 8px;
        }

        .stat-card span {
            font-size: 15px;
            color: var(--text-weak);
        }

        /* CTA */
        .cta-section {
            padding: 60px 0;
        }

        .cta-box {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark) 50%, #7c3aed);
            border-radius: 24px;
            padding: 54px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: 0 30px 70px rgba(99, 102, 241, 0.35);
        }

        .cta-box::before,
        .cta-box::after {
            content: "";
            position: absolute;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
        }

        .cta-box::before {
            width: 240px;
            height: 240px;
            top: -120px;
            right: -80px;
        }

        .cta-box::after {
            width: 180px;
            height: 180px;
            bottom: -90px;
            left: -60px;
        }

        .cta-box h2 {
            font-size: 30px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }

        .cta-box p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 16px;
            margin-bottom: 28px;
            position: relative;
            z-index: 1;
        }

        .cta-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }

        .btn-ghost {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 999px;
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(8px);
            transition: all 0.25s ease;
        }

        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.22);
            color: #fff;
            border-color: rgba(255, 255, 255, 0.5);
            transform: translateY(-2px);
        }

        /* FAQ */
        .faq-section {
            padding: 60px 0 80px;
            background: var(--bg-deep);
            border-top: 1px solid var(--border);
        }

        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: border-color 0.3s ease, background 0.3s ease;
        }

        .faq-item:hover {
            border-color: rgba(99, 102, 241, 0.4);
            background: rgba(255, 255, 255, 0.05);
        }

        .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            list-style: none;
            user-select: none;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary i {
            color: var(--primary-light);
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }

        .faq-item[open] summary i {
            transform: rotate(180deg);
        }

        .faq-item p {
            padding: 0 24px 20px;
            color: var(--text-weak);
            font-size: 15px;
            line-height: 1.8;
            border-top: 1px solid var(--border);
            margin: 0;
        }

        /* Footer */
        .footer {
            background: var(--bg-deep);
            border-top: 1px solid var(--border);
            padding: 60px 0 30px;
        }

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

        .footer-brand .logo {
            margin-bottom: 18px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.8;
            max-width: 380px;
        }

        .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 20px;
        }

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

        .footer-col li {
            margin-bottom: 12px;
        }

        .footer-col li a {
            color: var(--text-weak);
            font-size: 14px;
            transition: color 0.25s ease, padding-left 0.25s ease;
        }

        .footer-col li a:hover {
            color: var(--accent);
            padding-left: 6px;
        }

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

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

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

        /* Bottom Tab (Mobile) */
        .bottom-tab {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 999;
            background: rgba(11, 15, 26, 0.94);
            backdrop-filter: blur(16px);
            border-top: 1px solid var(--border);
            padding: 8px 12px;
            justify-content: space-around;
            box-shadow: 0 -10px 30px rgba(0, 0, 0, 0.3);
        }

        .bottom-tab-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 4px;
            font-size: 12px;
            color: var(--text-weak);
            padding: 6px 12px;
            border-radius: 12px;
            transition: all 0.25s ease;
            min-width: 64px;
        }

        .bottom-tab-item i {
            font-size: 19px;
        }

        .bottom-tab-item.active {
            color: var(--primary-light);
            background: rgba(99, 102, 241, 0.14);
        }

        .bottom-tab-item:hover {
            color: var(--accent);
        }

        /* Not Found */
        .not-found-section {
            min-height: 80vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 120px 24px 80px;
        }

        .not-found-box {
            text-align: center;
            max-width: 520px;
            margin: 0 auto;
        }

        .not-found-box i {
            font-size: 64px;
            color: var(--primary-light);
            margin-bottom: 24px;
            display: block;
        }

        .not-found-box h1 {
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 14px;
        }

        .not-found-box p {
            color: var(--text-weak);
            margin-bottom: 28px;
        }

        .empty-tip {
            text-align: center;
            color: var(--text-weak);
            padding: 40px 0;
            font-size: 15px;
        }

        /* Focus */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .nav-menu {
                display: none;
                position: absolute;
                top: 76px;
                left: 0;
                right: 0;
                background: rgba(11, 15, 26, 0.98);
                border-bottom: 1px solid var(--border);
                padding: 20px;
                flex-direction: column;
                align-items: stretch;
                gap: 10px;
                box-shadow: var(--shadow);
            }

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

            .nav-link {
                text-align: center;
                padding: 14px 20px;
            }

            .nav-toggle {
                display: inline-flex;
            }

            .header-inner {
                height: 72px;
            }

            .search-box {
                display: none;
            }

            .bottom-tab {
                display: flex;
            }

            body {
                padding-bottom: 68px;
            }

            .article-layout {
                grid-template-columns: 1fr;
            }

            .article-sidebar {
                display: grid;
                grid-template-columns: repeat(3, 1fr);
                gap: 20px;
            }

            .side-tip {
                grid-column: span 1;
            }

            .article-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 18px;
            }

            .logo-text {
                font-size: 19px;
            }

            .logo-icon {
                width: 38px;
                height: 38px;
                font-size: 16px;
            }

            .article-hero {
                padding: 140px 0 50px;
            }

            .article-head h1 {
                font-size: 28px;
            }

            .article-desc {
                font-size: 15px;
            }

            .article-body {
                padding: 28px 22px;
                font-size: 15px;
            }

            .article-body h2 {
                font-size: 22px;
            }

            .article-body h3 {
                font-size: 18px;
            }

            .breadcrumb .current {
                max-width: 160px;
            }

            .article-sidebar {
                grid-template-columns: 1fr;
            }

            .section-head h2 {
                font-size: 26px;
            }

            .faq-item summary {
                font-size: 15px;
            }

            .cta-box {
                padding: 40px 24px;
            }

            .cta-box h2 {
                font-size: 24px;
            }

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

        @media (max-width: 520px) {
            .header-inner {
                height: 66px;
            }

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

            .nav-toggle {
                width: 40px;
                height: 40px;
            }

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

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }

            .stat-card {
                padding: 24px 16px;
            }

            .stat-card strong {
                font-size: 28px;
            }

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

/* roulang page: category2 */
:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #818cf8;
  --accent: #22d3ee;
  --accent-dark: #0891b2;
  --bg: #0b1020;
  --bg-alt: #111827;
  --bg-card: #1a2332;
  --bg-card-hover: #1f2a3d;
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --text-weak: #64748b;
  --border: #2d3b4f;
  --border-light: #3b4a63;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --shadow-sm: 0 2px 12px rgba(0,0,0,0.25);
  --shadow-md: 0 8px 30px rgba(0,0,0,0.35);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.45);
  --gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #22d3ee 100%);
  --gradient-soft: linear-gradient(145deg, #1a2332 0%, #1e2a3f 100%);
  --spacing: 80px;
  --container: 1200px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  font-size: 16px;
}
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: var(--transition); }
button { font-family: inherit; border: none; cursor: pointer; background: none; }
input { font-family: inherit; outline: none; }
ul, ol { list-style: none; }
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
.section {
  padding: var(--spacing) 0;
  position: relative;
}
.section-alt { background: var(--bg-alt); }
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}
.section-label::before {
  content: "";
  width: 24px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}
.section-title {
  font-size: 36px;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}
.section-subtitle {
  font-size: 16px;
  color: var(--text-muted);
  max-width: 640px;
  margin-bottom: 48px;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--gradient);
  color: #fff;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 15px;
  font-weight: 700;
  border: none;
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.3);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(99, 102, 241, 0.4);
}
.btn-primary:active { transform: translateY(0); }
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: transparent;
  color: var(--text);
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid var(--border-light);
  transition: var(--transition);
}
.btn-secondary:hover {
  border-color: var(--primary);
  color: var(--primary-light);
  background: rgba(99, 102, 241, 0.08);
}
/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(11, 16, 32, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: var(--transition);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 800;
  color: var(--text);
  flex-shrink: 0;
}
.logo-icon {
  width: 40px;
  height: 40px;
  background: var(--gradient);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 18px;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}
.logo-text span { color: var(--accent); }
.nav-menu {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-link {
  padding: 10px 18px;
  border-radius: 50px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  transition: var(--transition);
  white-space: nowrap;
}
.nav-link:hover { color: var(--text); background: rgba(255,255,255,0.04); }
.nav-link.active {
  color: #fff;
  background: var(--gradient);
  font-weight: 600;
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.3);
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: 50px;
  padding: 8px 16px;
  width: 220px;
  transition: var(--transition);
}
.search-box:focus-within {
  border-color: var(--primary);
  background: rgba(255,255,255,0.08);
}
.search-box i {
  color: var(--text-muted);
  font-size: 14px;
}
.search-box input {
  background: none;
  border: none;
  color: var(--text);
  font-size: 14px;
  width: 100%;
}
.search-box input::placeholder { color: var(--text-weak); }
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(255,255,255,0.05);
  color: var(--text);
  font-size: 20px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
}
/* Hero */
.hero {
  padding: 160px 0 100px;
  background: var(--bg);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  opacity: 0.2;
  z-index: 0;
}
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11,16,32,0.7) 0%, var(--bg) 100%);
  z-index: 0;
}
.hero-ring {
  position: absolute;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  border: 1px solid rgba(99, 102, 241, 0.15);
  top: -100px;
  right: -100px;
  z-index: 1;
  animation: pulse 6s infinite;
}
.hero-ring::before, .hero-ring::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(34, 211, 238, 0.12);
}
.hero-ring::before { inset: 60px; }
.hero-ring::after { inset: 130px; }
@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.6; }
  50% { transform: scale(1.08); opacity: 1; }
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 2;
}
.hero-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.2);
  padding: 8px 20px;
  border-radius: 50px;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary-light);
  margin-bottom: 24px;
}
.hero-label i { font-size: 14px; }
.hero-title {
  font-size: 52px;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -1px;
  margin-bottom: 24px;
}
.hero-title .gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-desc {
  font-size: 17px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 36px;
  max-width: 480px;
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 32px;
  padding-top: 32px;
  border-top: 1px solid rgba(255,255,255,0.08);
}
.hero-stat-number {
  font-size: 28px;
  font-weight: 800;
  color: var(--text);
}
.hero-stat-number span { color: var(--accent); }
.hero-stat-label {
  font-size: 13px;
  color: var(--text-muted);
}
.hero-panel {
  background: var(--gradient-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
  position: relative;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.hero-panel::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient);
}
.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
    padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}
.panel-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  font-weight: 700;
}
.panel-title i { color: var(--accent); }
.panel-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  color: #34d399;
  background: rgba(52, 211, 153, 0.1);
  padding: 4px 12px;
  border-radius: 50px;
}
.panel-status::before {
  content: '';
  width: 6px;
  height: 6px;
  background: #34d399;
  border-radius: 50%;
  animation: blink 1.5s infinite;
}
@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}
.panel-score {
  display: flex;
  align-items: end;
  gap: 10px;
  margin-bottom: 24px;
}
.score-number {
  font-size: 64px;
  font-weight: 900;
  line-height: 1;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.score-total { font-size: 18px; color: var(--text-muted); margin-bottom: 8px; }
.score-label { font-size: 13px; color: var(--text-muted); }
.panel-bars {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 28px;
}
.panel-bar-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
}
.panel-bar-label { width: 60px; color: var(--text-muted); flex-shrink: 0; }
.panel-bar-track {
  flex: 1;
  height: 6px;
  background: rgba(255,255,255,0.06);
  border-radius: 10px;
  overflow: hidden;
}
.panel-bar-fill {
  height: 100%;
  background: var(--gradient);
  border-radius: 10px;
  transition: width 1s ease;
}
.panel-bar-value { width: 36px; text-align: right; font-weight: 600; font-size: 13px; }
.panel-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}
.panel-footer-text { font-size: 13px; color: var(--text-muted); }
/* Stats band */
.stats-band {
  padding: 60px 0;
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}
.stat-item {
  text-align: center;
  padding: 24px 16px;
  border-radius: var(--radius);
  background: rgba(255,255,255,0.02);
  border: 1px solid transparent;
  transition: var(--transition);
}
.stat-item:hover {
  border-color: var(--border);
  background: rgba(255,255,255,0.04);
}
.stat-icon {
  font-size: 28px;
  margin-bottom: 12px;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.stat-number {
  font-size: 36px;
  font-weight: 900;
  line-height: 1.2;
}
.stat-number sup { font-size: 16px; color: var(--accent); margin-left: 2px; }
.stat-label {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 4px;
}
/* Review cards */
.review-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.review-card {
  background: var(--gradient-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  position: relative;
}
.review-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-light);
}
.review-card-image {
  position: relative;
  height: 200px;
  overflow: hidden;
}
.review-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.review-card:hover .review-card-image img {
  transform: scale(1.05);
}
.review-card-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(11, 16, 32, 0.85) 100%);
}
.review-card-score {
  position: absolute;
  top: 16px;
  right: 16px;
  background: rgba(11, 16, 32, 0.8);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 12px;
  padding: 8px 14px;
  z-index: 2;
  text-align: center;
}
.review-card-score-number {
  font-size: 22px;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
}
.review-card-score-label {
  font-size: 10px;
  color: var(--text-muted);
}
.review-card-tag {
  position: absolute;
  bottom: 16px;
  left: 16px;
  z-index: 2;
  background: rgba(99, 102, 241, 0.9);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 50px;
}
.review-card-content {
  padding: 24px;
}
.review-card-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1.4;
}
.review-card-desc {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 16px;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.review-card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  color: var(--text-weak);
}
.review-card-meta i { font-size: 12px; }
/* Filter tabs */
.filter-tabs {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.filter-tab {
  padding: 10px 22px;
  border-radius: 50px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  transition: var(--transition);
}
.filter-tab:hover {
  color: var(--text);
  border-color: var(--border-light);
}
.filter-tab.active {
  color: #fff;
  background: var(--gradient);
  border-color: transparent;
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.25);
}
/* Compare section */
.compare-section {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.compare-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-card);
}
.compare-table {
  width: 100%;
  min-width: 860px;
  border-collapse: collapse;
}
.compare-table th,
.compare-table td {
  padding: 16px 20px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
  white-space: nowrap;
}
.compare-table th {
  background: rgba(99, 102, 241, 0.06);
  font-weight: 600;
  color: var(--text);
  font-size: 13px;
}
.compare-table th:first-child { border-radius: var(--radius) 0 0 0; }
.compare-table th:last-child { border-radius: 0 var(--radius) 0 0; }
.compare-table tr:last-child td { border-bottom: none; }
.compare-table tr:hover td { background: rgba(255,255,255,0.02); }
.compare-table .game-name {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
}
.compare-table .game-name img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  object-fit: cover;
}
.rating-badge {
  display: inline-flex;
  align-items: center;
  background: rgba(52, 211, 153, 0.12);
  color: #34d399;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 13px;
}
.rating-badge.high { background: rgba(99, 102, 241, 0.12); color: var(--primary-light); }
.rating-badge.medium { background: rgba(251, 191, 36, 0.12); color: #fbbf24; }
/* Review methodology */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.step-item {
  padding: 32px 28px;
  background: var(--gradient-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  position: relative;
  transition: var(--transition);
}
.step-item:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}
.step-number {
  font-size: 14px;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: 1px;
  margin-bottom: 12px;
}
.step-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}
.step-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}
/* Latest list */
.latest-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.latest-item {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 20px;
  background: var(--gradient-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: var(--transition);
}
.latest-item:hover {
  border-color: var(--border-light);
  background: var(--bg-card-hover);
  transform: translateX(4px);
}
.latest-item-index {
  font-size: 20px;
  font-weight: 800;
  color: var(--text-weak);
  width: 32px;
  text-align: center;
  flex-shrink: 0;
}
.latest-item-index.hot { color: var(--accent); }
.latest-item-thumb {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  flex-shrink: 0;
}
.latest-item-content {
  flex: 1;
  min-width: 0;
}
.latest-item-title {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.latest-item-meta {
  display: flex;
  gap: 16px;
  font-size: 12px;
  color: var(--text-muted);
}
.latest-item-rating {
  font-weight: 700;
  color: var(--accent);
  flex-shrink: 0;
}
.latest-item-arrow {
  color: var(--text-weak);
  opacity: 0;
  transform: translateX(-8px);
  transition: var(--transition);
  flex-shrink: 0;
}
.latest-item:hover .latest-item-arrow {
  opacity: 1;
  transform: translateX(0);
  color: var(--accent);
}
/* CTA */
.cta-section {
  padding: 100px 0;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  opacity: 0.15;
}
.cta-box {
  position: relative;
  background: var(--gradient-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 60px;
  text-align: center;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.cta-box::before {
  content: '';
  position: absolute;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, transparent 70%);
  top: -200px;
  left: -100px;
  pointer-events: none;
}
.cta-box::after {
  content: '';
  position: absolute;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.12) 0%, transparent 70%);
  bottom: -200px;
  right: -100px;
  pointer-events: none;
}
.cta-title {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 16px;
}
.cta-desc {
  font-size: 16px;
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto 36px;
}
.cta-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  position: relative;
  z-index: 2;
}
/* FAQ */
.faq-wrap {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  background: var(--gradient-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0;
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: var(--border-light); }
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 28px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  background: none;
  color: var(--text);
  width: 100%;
  text-align: left;
}
.faq-question i {
  color: var(--text-muted);
  transition: transform 0.3s ease;
  font-size: 14px;
}
.faq-item.open .faq-question i { transform: rotate(180deg); color: var(--accent); }
.faq-answer {
  display: none;
  padding: 0 28px 24px;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
}
.faq-answer.show { display: block; }
/* Footer */
.footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  padding: 60px 0 30px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--border);
}
.footer-brand p {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 16px;
  max-width: 360px;
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 20px;
}
.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.footer-col ul a {
  font-size: 14px;
  color: var(--text-muted);
  transition: var(--transition);
}
.footer-col ul a:hover { color: var(--accent); padding-left: 4px; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  font-size: 13px;
  color: var(--text-weak);
}
.footer-bottom a {
  color: var(--text-muted);
}
.footer-bottom a:hover { color: var(--accent); }
/* Mobile bottom nav */
.mobile-bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(17, 24, 39, 0.95);
  backdrop-filter: blur(20px);
  border-top: 1px solid var(--border);
  display: none;
  padding: 6px 0;
  padding-bottom: calc(6px + env(safe-area-inset-bottom));
}
.mobile-nav-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4px;
  max-width: 500px;
  margin: 0 auto;
}
.mobile-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 8px 4px;
  border-radius: 10px;
  color: var(--text-muted);
  font-size: 10px;
  font-weight: 500;
  transition: var(--transition);
}
.mobile-nav-item i {
  font-size: 20px;
  transition: var(--transition);
}
.mobile-nav-item:hover { color: var(--text); }
.mobile-nav-item.active {
  color: var(--accent);
}
.mobile-nav-item.active i {
  transform: scale(1.15);
}
/* Reveal animation */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
/* Responsive */
@media (max-width: 1024px) {
  :root { --spacing: 64px; }
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero { padding: 140px 0 60px; }
  .hero-title { font-size: 42px; }
  .hero-panel { max-width: 520px; }
  .review-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .search-box { width: 160px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .nav-actions .btn-primary { display: none; }
}
@media (max-width: 768px) {
  :root { --spacing: 56px; }
  .section-title { font-size: 30px; }
  .nav-menu {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(11, 16, 32, 0.95);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 16px 24px;
    gap: 4px;
    border-bottom: 1px solid var(--border);
    transform: translateY(-150%);
    transition: transform 0.3s ease;
    max-height: calc(100vh - 72px);
    overflow-y: auto;
  }
  .nav-menu.open { transform: translateY(0); }
  .nav-link { width: 100%; text-align: center; padding: 14px; }
  .nav-toggle { display: flex; }
  .search-box { width: 44px; padding: 8px; }
  .search-box input { display: none; }
  .search-box i { font-size: 18px; }
  .hero { padding: 120px 0 48px; }
  .hero-title { font-size: 36px; }
  .hero-actions .btn-secondary { display: none; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .hero-panel { padding: 28px; }
  .review-grid { grid-template-columns: 1fr; max-width: 420px; margin: 0 auto; }
  .steps-grid { grid-template-columns: 1fr; max-width: 420px; margin: 0 auto; }
  .stats-grid { gap: 12px; }
  .stat-number { font-size: 28px; }
  .cta-box { padding: 40px 24px; }
  .cta-title { font-size: 26px; }
  .cta-actions .btn-primary { padding: 12px 24px; font-size: 14px; }
  .footer-grid { grid-template-columns: 1fr; gap: 36px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
  .mobile-bottom-nav { display: block; }
  body { padding-bottom: 70px; }
  .latest-item { padding: 16px; }
  .latest-item-meta { flex-wrap: wrap; gap: 8px; }
  .compare-section .container { padding: 0 12px; }
  .faq-question { padding: 18px 20px; font-size: 15px; }
  .faq-answer { padding: 0 20px 20px; }
}
@media (max-width: 520px) {
  .hero-title { font-size: 28px; }
  .hero-label { font-size: 12px; }
  .section-title { font-size: 26px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-icon { font-size: 22px; }
  .stat-number { font-size: 24px; }
  .stat-label { font-size: 12px; }
  .filter-tabs { gap: 8px; }
  .filter-tab { padding: 8px 16px; font-size: 13px; }
  .review-card-content { padding: 18px; }
  .latest-item-thumb { width: 48px; height: 48px; }
  .latest-item-index { width: 24px; font-size: 16px; }
  .cta-box { padding: 32px 16px; }
  .cta-actions { flex-direction: column; align-items: center; }
  .footer-bottom span { font-size: 12px; }
}

/* roulang page: category3 */
:root {
    --primary: #4f46e5;
    --primary-dark: #3730a3;
    --primary-light: #818cf8;
    --primary-mist: #eef0fe;
    --accent: #06b6d4;
    --accent-dark: #0e7490;
    --accent-mist: #e0f7fc;
    --heat: #f59e0b;
    --heat-mist: #fef3c7;
    --success: #10b981;
    --deep: #0b1220;
    --deep-2: #0f172a;
    --body-bg: #f3f4f8;
    --card-bg: #ffffff;
    --text-title: #0d1b2e;
    --text-body: #3f4a5c;
    --text-muted: #7b8595;
    --line-gentle: #e9edf5;
    --radius-lg: 20px;
    --radius-md: 14px;
    --radius-sm: 9px;
    --shadow-xs: 0 1px 3px rgba(15,23,42,.04);
    --shadow-sm: 0 2px 10px rgba(15,23,42,.05);
    --shadow-md: 0 10px 32px rgba(15,23,42,.08);
    --shadow-lg: 0 24px 60px rgba(15,23,42,.12);
    --font-main: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'HarmonyOS Sans SC', 'Microsoft YaHei', sans-serif;
    --font-mono: ui-monospace, 'SF Mono', 'JetBrains Mono', Menlo, Monaco, Consolas, monospace;
    --space-section: 92px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-tap-highlight-color: transparent; }
body { font-family: var(--font-main); font-size: 16px; line-height: 1.7; color: var(--text-body); background: var(--body-bg); }
a { text-decoration: none; color: inherit; transition: color .25s; }
img { display: block; max-width: 100%; }
ul, ol { list-style: none; }
input, button, textarea { font-family: inherit; font-size: inherit; outline: none; }
button { cursor: pointer; background: none; border: none; }
:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }

.container { width: min(1200px, 100% - 48px); margin-inline: auto; }

.section { padding: var(--space-section) 0; }
.section-dark { background: var(--deep); color: #dfe7f5; }
.section-head { max-width: 640px; margin-bottom: 48px; }
.section-head.center { margin-inline: auto; text-align: center; }
.section-eyebrow { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--primary); background: var(--primary-mist); border: 1px solid #dfe3fd; padding: 6px 14px; border-radius: 999px; margin-bottom: 14px; }
.section-eyebrow.dark { background: rgba(79,70,229,.15); color: #b3baff; border-color: rgba(129,140,248,.25); }
.section-title { font-size: clamp(24px, 3vw, 34px); line-height: 1.35; font-weight: 800; color: var(--text-title); }
.section-dark .section-title { color: #f1f4ff; }
.section-sub { margin-top: 12px; font-size: 15px; color: var(--text-muted); }
.section-dark .section-sub { color: #93a1bd; }

.btn-primary, .btn-ghost, .btn-light, .btn-outline { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 13px 28px; border-radius: var(--radius-sm); font-size: 15px; font-weight: 600; transition: all .25s ease; text-align: center; }
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 8px 20px rgba(79,70,229,.22); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 12px 28px rgba(79,70,229,.28); }
.btn-primary:active { transform: translateY(0); }
.btn-ghost { background: transparent; color: #fff; border: 1px solid rgba(255,255,255,.35); backdrop-filter: blur(6px); }
.btn-ghost:hover { border-color: #fff; background: rgba(255,255,255,.1); transform: translateY(-2px); }
.btn-light { background: #fff; color: var(--primary-dark); box-shadow: var(--shadow-md); }
.btn-light:hover { background: #f1f2ff; transform: translateY(-2px); }
.btn-outline { background: transparent; color: var(--primary); border: 1px solid #d7dbef; }
.btn-outline:hover { border-color: var(--primary); background: var(--primary-mist); }

.header { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,.88); backdrop-filter: blur(18px); border-bottom: 1px solid rgba(233,237,245,.9); box-shadow: 0 1px 12px rgba(15,23,42,.04); }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; height: 72px; }
.logo { display: inline-flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-icon { width: 40px; height: 40px; display: inline-flex; align-items: center; justify-content: center; border-radius: 12px; background: linear-gradient(135deg, #4f46e5, #06b6d4); color: #fff; font-size: 18px; box-shadow: 0 6px 16px rgba(79,70,229,.25); }
.logo-text { font-size: 20px; font-weight: 800; color: var(--text-title); letter-spacing: -.02em; }
.logo-text span { color: var(--primary); }
.nav-menu { display: flex; align-items: center; gap: 4px; }
.nav-link { position: relative; padding: 8px 14px; border-radius: var(--radius-sm); font-size: 15px; font-weight: 500; color: #576274; transition: all .22s; }
.nav-link:hover { color: var(--primary); background: var(--primary-mist); }
.nav-link.active { color: var(--primary); font-weight: 700; }
.nav-link.active::after { content: ''; position: absolute; left: 14px; right: 14px; bottom: 2px; height: 3px; border-radius: 2px; background: var(--primary); }
.nav-actions { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.search-box { position: relative; width: 180px; transition: width .3s; }
.search-box input { width: 100%; height: 40px; padding: 0 14px 0 38px; border: 1px solid var(--line-gentle); border-radius: 999px; background: #f7f8fc; font-size: 14px; color: var(--text-title); transition: all .25s; }
.search-box input:focus { border-color: var(--primary); background: #fff; box-shadow: 0 0 0 3px rgba(79,70,229,.12); }
.search-box i { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); font-size: 14px; color: var(--text-muted); }
.nav-toggle { display: none; width: 42px; height: 42px; border-radius: 10px; background: var(--primary-mist); color: var(--primary); font-size: 18px; align-items: center; justify-content: center; }

.page-hero { position: relative; padding: 110px 0 96px; background-size: cover; background-position: center; color: #fff; isolation: isolate; }
.page-hero::before { content: ''; position: absolute; inset: 0; background: linear-gradient(115deg, rgba(11,18,32,.92) 0%, rgba(15,23,42,.75) 55%, rgba(79,70,229,.35) 100%); z-index: -1; }
.page-hero::after { content: ''; position: absolute; inset: 0; background: radial-gradient(ellipse at 80% 20%, rgba(6,182,212,.18) 0%, transparent 60%); z-index: -1; }
.page-hero .container { max-width: 820px; }
.page-hero h1 { font-size: clamp(30px, 5vw, 52px); line-height: 1.15; font-weight: 800; letter-spacing: -.03em; }
.page-hero h1 span { color: #a5b4fc; }
.page-hero p { margin-top: 16px; font-size: 16px; line-height: 1.8; color: rgba(255,255,255,.82); max-width: 620px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 30px; }

.stats-bar { position: relative; z-index: 2; margin-top: -38px; background: var(--card-bg); border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); border: 1px solid rgba(233,237,245,.7); display: grid; grid-template-columns: repeat(4, 1fr); overflow: hidden; }
.stat-item { padding: 22px 18px; text-align: center; position: relative; }
.stat-item + .stat-item::before { content: ''; position: absolute; left: 0; top: 22%; bottom: 22%; width: 1px; background: var(--line-gentle); }
.stat-num { font-family: var(--font-mono); font-size: 28px; font-weight: 700; color: var(--primary); line-height: 1.2; }
.stat-num small { font-size: 16px; margin-left: 2px; }
.stat-label { font-size: 13px; color: var(--text-muted); margin-top: 4px; }

.featured-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.feature-card { position: relative; border-radius: var(--radius-lg); overflow: hidden; background: var(--card-bg); box-shadow: var(--shadow-sm); transition: all .35s; border: 1px solid rgba(233,237,245,.6); }
.feature-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-6px); }
.feature-cover { position: relative; height: 230px; overflow: hidden; }
.feature-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.feature-card:hover .feature-cover img { transform: scale(1.04); }
.feature-cover::after { content: ''; position: absolute; inset: 0; background: linear-gradient(to top, rgba(11,18,32,.55), transparent 45%); }
.feature-tag { position: absolute; left: 16px; top: 16px; z-index: 2; display: inline-flex; align-items: center; gap: 6px; background: rgba(255,255,255,.94); color: var(--primary); font-size: 12px; font-weight: 700; padding: 5px 12px; border-radius: 999px; box-shadow: var(--shadow-xs); backdrop-filter: blur(4px); }
.feature-body { padding: 24px; }
.feature-body h3 { font-size: 19px; font-weight: 700; color: var(--text-title); line-height: 1.45; margin-bottom: 8px; }
.feature-body p { font-size: 14px; color: var(--text-muted); line-height: 1.7; }
.feature-meta { display: flex; gap: 16px; margin-top: 16px; font-size: 12px; color: var(--text-muted); }
.feature-meta span { display: inline-flex; align-items: center; gap: 5px; }

.news-wrap { display: grid; grid-template-columns: 1fr; gap: 16px; }
.filter-tabs { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 28px; }
.filter-btn { padding: 7px 18px; border-radius: 999px; border: 1px solid var(--line-gentle); background: #fff; font-size: 14px; font-weight: 500; color: var(--text-body); transition: all .25s; }
.filter-btn:hover { border-color: var(--primary); color: var(--primary); }
.filter-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); box-shadow: 0 6px 16px rgba(79,70,229,.2); }
.news-item { display: grid; grid-template-columns: 88px 1fr auto; gap: 18px; align-items: center; padding: 18px 22px; background: var(--card-bg); border-radius: var(--radius-md); border: 1px solid rgba(233,237,245,.7); box-shadow: var(--shadow-xs); transition: all .25s; }
.news-item:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); border-color: #dfe3fd; }
.news-date { text-align: center; background: var(--primary-mist); border-radius: var(--radius-sm); padding: 10px 8px; min-width: 72px; }
.news-date {
    background: var(--primary-mist);
    border-radius: var(--radius-sm);
    padding: 10px 8px;
    text-align: center;
    min-width: 72px;
}
.news-date b { display: block; font-size: 20px; line-height: 1.1; color: var(--primary); font-family: var(--font-mono); font-weight: 700; }
.news-date span { font-size: 12px; color: var(--text-muted); }
.news-main h4 { font-size: 16px; font-weight: 700; color: var(--text-title); margin-bottom: 4px; line-height: 1.5; }
.news-main h4:hover { color: var(--primary); }
.news-main p { font-size: 13px; color: var(--text-muted); line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-tag { display: inline-block; font-size: 12px; font-weight: 600; color: var(--primary); background: var(--primary-mist); padding: 4px 12px; border-radius: 999px; white-space: nowrap; }

.rank-panel { background: var(--deep-2); border-radius: var(--radius-lg); padding: 34px; color: #dfe7f5; position: relative; overflow: hidden; }
.rank-panel::before { content: ''; position: absolute; right: -40px; top: -40px; width: 220px; height: 220px; background: radial-gradient(circle, rgba(79,70,229,.25), transparent 65%); border-radius: 50%; }
.rank-panel::after { content: ''; position: absolute; left: -30px; bottom: -50px; width: 180px; height: 180px; background: radial-gradient(circle, rgba(6,182,212,.18), transparent 65%); border-radius: 50%; }
.rank-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 24px; position: relative; z-index: 1; }
.rank-head h3 { font-size: 22px; font-weight: 700; color: #fff; display: flex; align-items: center; gap: 10px; }
.rank-head h3 i { color: var(--heat); }
.rank-updated { font-size: 12px; color: #8794ad; display: flex; align-items: center; gap: 6px; }
.rank-list { display: flex; flex-direction: column; gap: 12px; position: relative; z-index: 1; }
.rank-row { display: grid; grid-template-columns: 40px 1fr auto auto; gap: 14px; align-items: center; padding: 14px 18px; background: rgba(255,255,255,.04); border: 1px solid rgba(255,255,255,.06); border-radius: 12px; transition: all .25s; }
.rank-row:hover { background: rgba(255,255,255,.08); transform: translateX(4px); border-color: rgba(129,140,248,.35); }
.rank-no { font-family: var(--font-mono); font-weight: 800; font-size: 20px; color: #94a3b8; text-align: center; }
.rank-row:nth-child(1) .rank-no { color: var(--heat); }
.rank-row:nth-child(2) .rank-no { color: #e2e8f0; }
.rank-row:nth-child(3) .rank-no { color: #fdba74; }
.rank-name { font-size: 15px; font-weight: 700; color: #f1f4ff; }
.rank-index { font-family: var(--font-mono); font-size: 18px; font-weight: 700; color: #a5b4fc; }
.rank-trend { font-family: var(--font-mono); font-size: 13px; padding: 3px 10px; border-radius: 999px; background: rgba(16,185,129,.14); color: #34d399; font-weight: 600; }
.rank-trend.down { background: rgba(244,63,94,.14); color: #fb7185; }

.flow-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.flow-step { position: relative; padding: 28px 22px; background: var(--card-bg); border-radius: var(--radius-lg); border: 1px solid rgba(233,237,245,.8); box-shadow: var(--shadow-sm); transition: all .3s; }
.flow-step:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.flow-step::before { content: attr(data-num); position: absolute; right: 18px; top: 14px; font-family: var(--font-mono); font-size: 32px; font-weight: 800; color: #eef0fe; line-height: 1; }
.flow-icon { width: 48px; height: 48px; border-radius: 14px; display: inline-flex; align-items: center; justify-content: center; background: linear-gradient(135deg, #4f46e5, #06b6d4); color: #fff; font-size: 20px; margin-bottom: 16px; box-shadow: 0 8px 18px rgba(79,70,229,.22); }
.flow-step h4 { font-size: 16px; font-weight: 700; color: var(--text-title); margin-bottom: 8px; }
.flow-step p { font-size: 13px; color: var(--text-muted); line-height: 1.7; }

.faq-wrap { display: grid; grid-template-columns: 1fr; gap: 14px; }
.faq-item { background: var(--card-bg); border: 1px solid rgba(233,237,245,.85); border-radius: var(--radius-md); box-shadow: var(--shadow-xs); overflow: hidden; transition: all .25s; }
.faq-item:hover { border-color: #dfe3fd; }
.faq-btn { width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 20px 24px; text-align: left; background: none; border: none; color: var(--text-title); font-size: 16px; font-weight: 600; }
.faq-btn i { color: var(--primary); font-size: 15px; transition: transform .3s; flex-shrink: 0; }
.faq-item.open .faq-btn i { transform: rotate(45deg); }
.faq-content { max-height: 0; overflow: hidden; transition: max-height .35s ease; }
.faq-content-inner { padding: 0 24px 22px; font-size: 14px; color: var(--text-muted); line-height: 1.8; border-top: 1px solid var(--line-gentle); padding-top: 16px; }

.cta { position: relative; padding: 90px 0; background-size: cover; background-position: center; color: #fff; isolation: isolate; }
.cta::before { content: ''; position: absolute; inset: 0; background: linear-gradient(120deg, rgba(11,18,32,.94), rgba(55,48,163,.76)); z-index: -1; }
.cta-box { max-width: 720px; margin-inline: auto; text-align: center; }
.cta-box h2 { font-size: clamp(26px, 4vw, 38px); font-weight: 800; line-height: 1.3; }
.cta-box p { margin-top: 14px; color: rgba(255,255,255,.82); font-size: 15px; }
.cta-form { display: flex; gap: 12px; margin-top: 32px; background: rgba(255,255,255,.1); padding: 8px; border-radius: 999px; border: 1px solid rgba(255,255,255,.15); backdrop-filter: blur(10px); max-width: 520px; margin-inline: auto; }
.cta-form input { flex: 1; height: 46px; background: transparent; border: none; color: #fff; padding: 0 16px; font-size: 14px; }
.cta-form input::placeholder { color: rgba(255,255,255,.55); }
.cta-form button { height: 46px; padding: 0 26px; border-radius: 999px; background: #fff; color: var(--primary-dark); font-weight: 700; font-size: 14px; transition: all .25s; }
.cta-form button:hover { background: var(--primary-mist); transform: scale(1.02); }

.footer { background: var(--deep); color: #9aa7c0; padding: 72px 0 30px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr .9fr .9fr; gap: 48px; margin-bottom: 48px; }
.footer-brand .logo-text { color: #fff; }
.footer-brand p { margin-top: 16px; font-size: 14px; line-height: 1.8; color: #8794ad; max-width: 340px; }
.footer-brand .logo-icon { background: linear-gradient(135deg, #4f46e5, #06b6d4); }
.footer-col h4 { color: #fff; font-size: 15px; font-weight: 700; margin-bottom: 18px; }
.footer-col ul { display: flex; flex-direction: column; gap: 12px; }
.footer-col a { font-size: 14px; color: #8794ad; transition: all .25s; }
.footer-col a:hover { color: #fff; padding-left: 6px; }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 10px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,.08); font-size: 13px; color: #64748b; }
.footer-bottom a { color: #8794ad; }
.footer-bottom a:hover { color: #fff; }

.bottom-tab { display: none; position: fixed; left: 0; right: 0; bottom: 0; z-index: 200; background: rgba(255,255,255,.94); backdrop-filter: blur(18px); border-top: 1px solid var(--line-gentle); box-shadow: 0 -6px 24px rgba(15,23,42,.06); padding-bottom: env(safe-area-inset-bottom); }
.bottom-tab-inner { display: grid; grid-template-columns: repeat(4, 1fr); }
.tab-item { display: flex; flex-direction: column; align-items: center; gap: 3px; padding: 10px 4px 8px; font-size: 11px; color: var(--text-muted); transition: all .2s; }
.tab-item i { font-size: 18px; }
.tab-item.active { color: var(--primary); font-weight: 700; }
.tab-item.active i { transform: translateY(-1px); }

@media (max-width: 1024px) {
    .featured-grid { grid-template-columns: 1fr; }
    .flow-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr .8fr .8fr; gap: 32px; }
    .nav-menu { display: none; position: absolute; top: 72px; left: 0; right: 0; background: #fff; border-bottom: 1px solid var(--line-gentle); box-shadow: var(--shadow-md); padding: 12px; flex-direction: column; align-items: stretch; gap: 4px; }
    .nav-menu.open { display: flex; }
    .nav-link { padding: 12px 18px; font-size: 15px; }
    .nav-link.active::after { display: none; }
    .nav-link.active { background: var(--primary-mist); }
    .nav-toggle { display: inline-flex; }
    .search-box { width: 140px; }
}

@media (max-width: 768px) {
    :root { --space-section: 64px; }
    .container { width: min(100% - 28px, 1200px); }
    .search-box { display: none; }
    .hero-actions .btn-hidden-m { display: none; }
    .stats-bar { grid-template-columns: repeat(2, 1fr); margin-top: -24px; }
    .stat-item:nth-child(3)::before { display: none; }
    .stat-item:nth-child(n+3) { border-top: 1px solid var(--line-gentle); }
    .news-item { grid-template-columns: 1fr; gap: 12px; padding: 18px; }
    .news-date { display: flex; align-items: center; gap: 8px; text-align: left; padding: 6px 14px; }
    .news-date b { font-size: 16px; }
    .news-tag { justify-self: start; }
    .rank-row { grid-template-columns: 32px 1fr auto; gap: 10px; }
    .rank-trend { display: none; }
    .footer-grid { grid-template-columns: 1fr; gap: 28px; }
    .bottom-tab { display: block; }
    body { padding-bottom: 60px; }
}

@media (max-width: 520px) {
    .page-hero { padding: 76px 0 64px; }
    .feature-cover { height: 180px; }
    .feature-body { padding: 18px; }
    .feature-body h3 { font-size: 17px; }
    .flow-grid { grid-template-columns: 1fr; }
    .cta-form { flex-direction: column; padding: 12px; border-radius: 18px; }
    .cta-form button { width: 100%; margin-top: 4px; }
    .rank-panel { padding: 22px; }
    .rank-head { flex-direction: column; align-items: flex-start; gap: 8px; }
    .footer-bottom { flex-direction: column; text-align: center; }
    .btn-primary, .btn-ghost, .btn-light, .btn-outline { width: auto; }
}