/* roulang page: index */
:root {
  --bg-base: #070B14;
  --bg-deep: #0B1220;
  --primary: #1EA8E6;
  --primary-glow: rgba(30, 168, 230, 0.45);
  --accent: #2DE3C0;
  --cta: #F59E0B;
  --cta-dark: #D97706;
  --warn: #F43F5E;
  --text-primary: #F1F5F9;
  --text-secondary: rgba(226, 232, 240, 0.72);
  --text-muted: rgba(148, 163, 184, 0.6);
  --glass-bg: rgba(15, 23, 42, 0.55);
  --glass-border: rgba(148, 163, 184, 0.14);
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 12px 40px rgba(2, 6, 23, 0.45);
  --shadow-hover: 0 20px 60px rgba(30, 168, 230, 0.18);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.75;
  font-size: 16px;
  overflow-x: hidden;
}
body::before {
  content: '';
  position: fixed;
  top: -20%;
  left: -10%;
  width: 80%;
  height: 60%;
  background: radial-gradient(circle, rgba(30,168,230,0.08), transparent 70%);
  pointer-events: none;
  z-index: 0;
}
body::after {
  content: '';
  position: fixed;
  bottom: -10%;
  right: -10%;
  width: 60%;
  height: 50%;
  background: radial-gradient(circle, rgba(45,227,192,0.05), transparent 70%);
  pointer-events: none;
  z-index: 0;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, select { font-family: inherit; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7, 11, 20, 0.85);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  border-bottom: 1px solid transparent;
  transition: border-color .3s;
}
.site-header.scrolled { border-bottom-color: rgba(148,163,184,0.12); }
.header-top { border-bottom: 1px solid rgba(148,163,184,0.08); }
.header-nav { border-bottom: 1px solid rgba(148,163,184,0.06); }
.logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-icon {
  width: 38px; height: 38px; border-radius: 10px;
  background: linear-gradient(135deg, rgba(30,168,230,0.25), rgba(45,227,192,0.15));
  border: 1px solid rgba(30,168,230,0.4);
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 0 16px rgba(30,168,230,0.2);
}
.logo-text { font-size: 17px; font-weight: 800; color: #fff; letter-spacing: 0.01em; white-space: nowrap; }
.logo-text strong {
  background: linear-gradient(90deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-weight: 900;
}
.search-form {
  display: flex; align-items: center; width: 320px; max-width: 100%;
  background: rgba(15,23,42,0.6);
  border: 1px solid rgba(148,163,184,0.2);
  border-radius: 999px; padding: 0 6px 0 14px; transition: border-color .3s, box-shadow .3s;
}
.search-form:focus-within { border-color: var(--primary); box-shadow: 0 0 0 2px rgba(30,168,230,0.15); }
.search-form input { flex: 1; background: transparent; border: none; outline: none; color: var(--text-primary); font-size: 14px; padding: 8px 0; }
.search-form input::placeholder { color: rgba(148,163,184,0.5); }
.search-form button {
  width: 32px; height: 32px; border-radius: 50%;
  background: rgba(30,168,230,0.15); color: var(--primary);
  display: flex; align-items: center; justify-content: center; transition: background .3s;
}
.search-form button:hover { background: rgba(30,168,230,0.3); }
.header-actions { display: flex; align-items: center; gap: 16px; flex-shrink: 0; }
.header-login { color: rgba(226,232,240,0.7); font-size: 14px; transition: color .3s; }
.header-login:hover { color: var(--primary); }
.nav-tabs {
  list-style: none; display: flex; align-items: center; gap: 6px;
  overflow-x: auto; scrollbar-width: none; padding: 8px 0;
}
.nav-tabs::-webkit-scrollbar { display: none; }
.nav-tabs li { flex-shrink: 0; }
.nav-tabs a {
  display: inline-block; padding: 7px 18px; border-radius: 999px;
  font-size: 14px; font-weight: 500; color: rgba(226,232,240,0.75);
  border: 1px solid transparent; transition: all .25s; white-space: nowrap;
}
.nav-tabs a:hover { color: var(--text-primary); background: rgba(148,163,184,0.1); }
.nav-tabs a.active {
  background: rgba(30,168,230,0.2); color: var(--primary);
  border-color: rgba(30,168,230,0.4); font-weight: 600;
}
.nav-tabs-wrap { position: relative; }
.nav-fade {
  position: absolute; top: 0; bottom: 0; width: 28px; pointer-events: none;
}
.nav-fade-left { left: 0; background: linear-gradient(to right, rgba(7,11,20,0.9), transparent); }
.nav-fade-right { right: 0; background: linear-gradient(to left, rgba(7,11,20,0.9), transparent); }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-weight: 700; border-radius: var(--radius-sm); min-height: 48px;
  padding: 0 24px; font-size: 15px; transition: all .3s; vertical-align: middle;
}
.btn-sm { min-height: 38px; padding: 0 18px; font-size: 13px; border-radius: 8px; }
.btn-cta {
  background: linear-gradient(135deg, #F59E0B, #D97706);
  color: #1F1F1F; box-shadow: 0 0 20px rgba(245,158,11,0.3);
}
.btn-cta:hover { filter: brightness(1.08); box-shadow: 0 0 32px rgba(245,158,11,0.5); transform: translateY(-1px); }
.btn-cta:active { transform: translateY(1px); }
.btn-ghost {
  background: rgba(15,23,42,0.45); color: var(--primary);
  border: 1px solid rgba(30,168,230,0.5); backdrop-filter: blur(8px);
}
.btn-ghost:hover { background: rgba(30,168,230,0.1); border-color: var(--primary); }
.btn-ghost:active { transform: translateY(1px); }
.btn-primary {
  background: rgba(30,168,230,0.15); color: var(--primary);
  border: 1px solid rgba(30,168,230,0.4);
}
.btn-primary:hover { background: rgba(30,168,230,0.25); }
a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2px solid var(--primary); outline-offset: 2px;
}

.hero {
  position: relative; min-height: 85vh; display: flex; align-items: center;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover; background-position: center;
  padding: 80px 0 60px;
}
.hero::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(115deg, rgba(7,11,20,0.9) 30%, rgba(7,11,20,0.65) 60%, rgba(7,11,20,0.45) 100%);
}
.hero::after {
  content: ''; position: absolute; top: -10%; right: 15%; width: 340px; height: 130%;
  background: linear-gradient(120deg, transparent, rgba(30,168,230,0.12), transparent);
  transform: rotate(22deg); pointer-events: none;
}
@media (min-width: 1025px) {
  .hero { background-attachment: fixed; }
}
.hero .container { position: relative; z-index: 2; }
.hero-inner { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 60px; align-items: center; }
.hero h1 {
  font-size: clamp(2rem, 4vw, 3.2rem); font-weight: 800; line-height: 1.15;
  color: #fff; margin-bottom: 16px;
}
.hero h1 .grad-primary {
  background: linear-gradient(120deg, var(--primary), var(--accent));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub {
  font-size: clamp(1rem, 1.6vw, 1.2rem); color: rgba(226,232,240,0.8);
  max-width: 500px; margin-bottom: 32px; font-weight: 400;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 36px; }
.hero-badges { display: flex; gap: 10px; flex-wrap: wrap; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 14px; border-radius: 999px; font-size: 13px; font-weight: 600;
  background: rgba(30,168,230,0.1); color: rgba(226,232,240,0.85);
  border: 1px solid rgba(30,168,230,0.2);
}
.hero-badge .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 8px var(--accent); }
.hero-visual { position: relative; display: flex; justify-content: center; }
.phone-frame {
  width: 260px; height: 520px; border-radius: 36px; background: rgba(15,23,42,0.7);
  border: 2px solid rgba(148,163,184,0.2); padding: 14px;
  backdrop-filter: blur(20px); box-shadow: 0 30px 80px rgba(2,6,23,0.6), 0 0 40px rgba(30,168,230,0.08);
  position: relative; transform: rotate(2deg);
}
.phone-screen {
  width: 100%; height: 100%; border-radius: 24px; overflow: hidden;
  background: linear-gradient(180deg, rgba(30,168,230,0.08), rgba(7,11,20,0.9) 60%);
  border: 1px solid rgba(148,163,184,0.1);
  display: flex; flex-direction: column; padding: 20px 16px; gap: 12px;
}
.phone-notch {
  width: 90px; height: 20px; margin: 0 auto; border-radius: 999px;
  background: rgba(148,163,184,0.2); margin-bottom: 12px;
}
.phone-item {
  background: rgba(15,23,42,0.6); border: 1px solid rgba(148,163,184,0.12);
  border-radius: 12px; padding: 10px 12px; display: flex; align-items: center; gap: 10px;
}
.phone-item .icon {
  width: 30px; height: 30px; border-radius: 8px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  background: rgba(30,168,230,0.15); color: var(--primary);
}
.phone-item .label { font-size: 12px; color: rgba(148,163,184,0.6); }
.phone-item .value { font-size: 14px; font-weight: 700; color: #fff; }
.phone-item .value.accent { color: var(--accent); }
.phone-score {
  margin-top: auto; text-align: center; padding: 12px;
  background: linear-gradient(135deg, rgba(30,168,230,0.12), rgba(45,227,192,0.08));
  border: 1px solid rgba(30,168,230,0.2); border-radius: 12px;
}
.phone-score .num { font-size: 22px; font-weight: 800; color: var(--accent); }
.phone-score .desc { font-size: 12px; color: rgba(226,232,240,0.6); }
.float-chip {
  position: absolute; background: rgba(15,23,42,0.75); border: 1px solid rgba(148,163,184,0.2);
  border-radius: 12px; padding: 10px 16px; backdrop-filter: blur(12px);
  font-size: 13px; box-shadow: var(--shadow); z-index: 3;
}
.float-chip .chip-label { font-size: 11px; color: rgba(148,163,184,0.6); }
.float-chip .chip-value { font-size: 15px; font-weight: 700; color: #fff; }
.chip-1 { top: 30px; left: -40px; }
.chip-2 { bottom: 100px; right: -30px; }
.chip-3 { bottom: 30px; left: -10px; }

.section { padding: 96px 0; position: relative; z-index: 1; }
.section-deep { background: var(--bg-deep); }
.section-title-wrap { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-title { font-size: clamp(1.6rem, 2.8vw, 2.1rem); font-weight: 700; line-height: 1.3; margin-bottom: 12px; }
.section-sub { color: var(--text-secondary); font-size: 1rem; max-width: 600px; margin: 0 auto; }
.section-head-row { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; margin-bottom: 40px; flex-wrap: wrap; }
.section-head-row .section-title-wrap { text-align: left; margin: 0; }
.link-more { color: var(--primary); font-size: 14px; font-weight: 600; display: inline-flex; align-items: center; gap: 6px; white-space: nowrap; }
.link-more:hover { gap: 10px; }

.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: all .35s ease;
}
.glass-card:hover {
  box-shadow: var(--shadow-hover);
  border-color: rgba(148,163,184,0.28);
  transform: translateY(-3px);
}
.card-body { padding: 24px; }

.feature-card { position: relative; padding: 28px 24px; }
.feature-card .feature-icon {
  width: 48px; height: 48px; border-radius: 12px;
  background: rgba(30,168,230,0.1); border: 1px solid rgba(30,168,230,0.2);
  display: flex; align-items: center; justify-content: center;
  color: var(--primary); margin-bottom: 18px; font-size: 22px;
}
.feature-card:hover .feature-icon { background: rgba(30,168,230,0.2); }
.feature-card h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 8px; color: #fff; }
.feature-card p { color: var(--text-secondary); font-size: 0.95rem; }
.feature-card .corner {
  position: absolute; top: 12px; right: 12px; font-size: 28px; font-weight: 800;
  color: rgba(30,168,230,0.08); line-height: 1;
}

.step-wrap { display: flex; gap: 0; margin-top: 40px; position: relative; }
.step-item { flex: 1; position: relative; padding: 0 12px; text-align: center; }
.step-item::before {
  content: ''; position: absolute; top: 22px; left: calc(50% + 28px);
  width: calc(100% - 56px); height: 2px;
  background: linear-gradient(90deg, rgba(30,168,230,0.5), rgba(30,168,230,0.1));
  border-radius: 2px;
}
.step-item:last-child::before { display: none; }
.step-num {
  width: 44px; height: 44px; border-radius: 50%;
  background: rgba(30,168,230,0.15); border: 2px solid rgba(30,168,230,0.5);
  color: var(--primary); font-size: 16px; font-weight: 800;
  display: inline-flex; align-items: center; justify-content: center;
  margin-bottom: 12px; position: relative; z-index: 2;
}
.step-item h4 { font-size: 1rem; font-weight: 700; margin-bottom: 6px; color: #fff; }
.step-item p { font-size: 0.85rem; color: var(--text-secondary); }

.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat-card { text-align: center; padding: 32px 20px; }
.stat-num {
  font-size: clamp(2rem, 3vw, 2.6rem); font-weight: 900;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  display: inline-block; margin-bottom: 8px; font-style: normal;
}
.stat-label { color: var(--text-secondary); font-size: 14px; }

.testimonial-card { padding: 28px 26px; display: flex; flex-direction: column; gap: 16px; }
.testimonial-stars { display: flex; gap: 3px; color: var(--cta); font-size: 15px; }
.testimonial-text { color: rgba(226,232,240,0.82); font-size: 0.95rem; line-height: 1.75; flex: 1; }
.testimonial-user { display: flex; align-items: center; gap: 12px; border-top: 1px solid rgba(148,163,184,0.08); padding-top: 14px; }
.testimonial-avatar {
  width: 40px; height: 40px; border-radius: 50%;
  background: linear-gradient(135deg, rgba(30,168,230,0.3), rgba(45,227,192,0.2));
  display: flex; align-items: center; justify-content: center;
  font-size: 15px; font-weight: 700; color: var(--text-primary);
}
.testimonial-user .name { font-size: 14px; font-weight: 600; color: #fff; }
.testimonial-user .time { font-size: 12px; color: var(--text-muted); }

.news-card { display: flex; gap: 20px; padding: 16px; }
.news-thumb { width: 160px; height: 120px; border-radius: 12px; overflow: hidden; flex-shrink: 0; position: relative; }
.news-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.news-card:hover .news-thumb img { transform: scale(1.04); }
.news-body { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 6px; }
.news-cat {
  display: inline-block; width: fit-content;
  padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 600;
  background: rgba(30,168,230,0.12); color: var(--primary);
  border: 1px solid rgba(30,168,230,0.2);
}
.news-title { font-size: 1rem; font-weight: 700; color: #fff; line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden; transition: color .3s; }
.news-card:hover .news-title { color: var(--primary); }
.news-summary { font-size: 0.85rem; color: var(--text-secondary); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-date { font-size: 0.78rem; color: var(--text-muted); display: flex; align-items: center; gap: 5px; }
.empty-state {
  min-height: 220px; display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 12px; background: var(--glass-bg); border: 1px dashed rgba(148,163,184,0.25);
  border-radius: var(--radius); color: rgba(148,163,184,0.7); font-size: 15px;
}
.empty-state svg { color: rgba(148,163,184,0.4); }

.faq-item {
  background: rgba(15,23,42,0.45); border: 1px solid rgba(148,163,184,0.14);
  border-radius: 12px; margin-bottom: 12px; overflow: hidden; transition: border-color .3s;
}
.faq-item.active { border-color: rgba(30,168,230,0.35); }
.faq-question {
  width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 18px 22px; font-size: 15px; font-weight: 600; color: var(--text-primary); text-align: left;
  transition: color .3s;
}
.faq-question:hover { color: var(--primary); }
.faq-icon {
  width: 28px; height: 28px; border-radius: 50%; flex-shrink: 0;
  background: rgba(30,168,230,0.1); color: var(--primary);
  display: flex; align-items: center; justify-content: center; font-size: 18px; font-weight: 300;
  transition: transform .3s;
}
.faq-item.active .faq-icon { transform: rotate(45deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height .35s ease; }
.faq-answer-inner { padding: 0 22px 18px; color: var(--text-secondary); font-size: 0.92rem; }
.faq-item.active .faq-answer { max-height: 300px; }
.faq-item.active .faq-answer-inner { padding-top: 4px; border-top: 1px solid rgba(30,168,230,0.12); }

.cta-section {
  position: relative; overflow: hidden;
  background-image: url('/assets/images/backpic/back-2.webp');
  background-size: cover; background-position: center;
  padding: 80px 0; text-align: center;
}
.cta-section::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(7,11,20,0.88), rgba(11,18,32,0.78));
}
.cta-inner { position: relative; z-index: 2; }
.cta-inner h2 { font-size: clamp(1.4rem, 2.6vw, 2rem); font-weight: 700; margin-bottom: 14px; }
.cta-inner p { color: rgba(226,232,240,0.7); max-width: 560px; margin: 0 auto 30px; }
.cta-security {
  margin-top: 18px; font-size: 13px; color: rgba(148,163,184,0.6);
  display: inline-flex; align-items: center; gap: 8px;
}

.site-footer {
  background: #05080F;
  border-top: 1px solid rgba(148,163,184,0.06);
  padding: 60px 0 0; position: relative; z-index: 1;
}
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 40px; }
.footer-brand p { color: var(--text-muted); font-size: 14px; margin-top: 12px; max-width: 280px; }
.footer-col h4 { font-size: 14px; font-weight: 700; color: #fff; margin-bottom: 16px; }
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer-col ul a { color: var(--text-muted); font-size: 14px; transition: color .3s; }
.footer-col ul a:hover { color: var(--primary); }
.footer-security {
  border-top: 1px solid rgba(148,163,184,0.06); border-bottom: 1px solid rgba(148,163,184,0.06);
  padding: 20px 0; margin-bottom: 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap;
}
.security-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 16px; border-radius: 999px; font-size: 13px;
  background: rgba(245,158,11,0.08); border: 1px solid rgba(245,158,11,0.25); color: #F59E0B;
}
.security-badge.dark { background: rgba(15,23,42,0.6); border-color: rgba(148,163,184,0.2); color: rgba(226,232,240,0.7); }
.footer-copyright {
  padding: 20px 0; display: flex; align-items: center; justify-content: space-between;
  gap: 16px; flex-wrap: wrap; color: rgba(148,163,184,0.5); font-size: 13px;
}
.footer-icp { color: rgba(148,163,184,0.4); }

.reveal { opacity: 0; transform: translateY(20px); transition: opacity .6s ease, transform .6s ease; }
.reveal.revealed { opacity: 1; transform: translateY(0); }
.no-reveal .reveal { opacity: 1; transform: none; }

@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 48px; }
  .hero { min-height: auto; padding: 60px 0 80px; }
  .hero-visual { order: -1; }
  .phone-frame { transform: none; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .header-search { display: none; }
  .header-actions .header-login { display: none; }
  .logo-text { font-size: 15px; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }
  .step-wrap { flex-direction: column; gap: 24px; }
  .step-item::before { display: none; }
  .step-item { text-align: left; display: flex; gap: 16px; padding: 0; align-items: center; }
  .step-num { margin-bottom: 0; flex-shrink: 0; }
  .step-item .step-content { flex: 1; }
  .news-card { flex-direction: column; }
  .news-thumb { width: 100%; height: auto; aspect-ratio: 16/9; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .testimonial-card { padding: 20px; }
  .cta-section { padding: 60px 0; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-security { flex-direction: column; align-items: flex-start; }
  .footer-copyright { flex-direction: column; align-items: flex-start; }
  .chip-1, .chip-2, .chip-3 { display: none; }
}
@media (max-width: 480px) {
  .logo-text strong { display: block; }
  .logo-text { font-size: 13px; line-height: 1.2; }
  .btn-cta, .btn-ghost { font-size: 14px; padding: 0 16px; }
  .faq-question { padding: 14px 16px; font-size: 14px; }
  .faq-answer-inner { padding: 0 16px 16px; }
  .hero-badges { gap: 6px; }
  .hero-badge { padding: 4px 10px; font-size: 11px; }
}

/* roulang page: category1 */
:root {
      --bg-base: #070B14;
      --bg-deep: #0B1220;
      --primary: #1EA8E6;
      --primary-glow: rgba(30, 168, 230, 0.45);
      --accent: #2DE3C0;
      --cta: #F59E0B;
      --cta-deep: #D97706;
      --warn: #F43F5E;
      --text-primary: #F1F5F9;
      --text-secondary: rgba(226, 232, 240, 0.72);
      --text-muted: rgba(148, 163, 184, 0.6);
      --glass-bg: rgba(15, 23, 42, 0.55);
      --glass-border: rgba(148, 163, 184, 0.14);
      --radius-sm: 10px;
      --radius-md: 16px;
      --radius-lg: 20px;
      --shadow-card: 0 12px 40px rgba(2, 6, 23, 0.45);
      --shadow-hover: 0 20px 60px rgba(30, 168, 230, 0.18);
      --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
      scroll-padding-top: 120px;
    }

    body {
      font-family: var(--font-sans);
      background: var(--bg-base);
      color: var(--text-primary);
      line-height: 1.75;
      font-size: 16px;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: color 0.25s, border-color 0.25s, background 0.25s, box-shadow 0.25s, transform 0.25s;
    }

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

    button,
    input {
      font-family: inherit;
    }

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

    @media (max-width: 640px) {
      .container {
        padding: 0 16px;
      }
    }

    /* ===== Header ===== */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(7, 11, 20, 0.85);
      backdrop-filter: blur(16px) saturate(150%);
      -webkit-backdrop-filter: blur(16px) saturate(150%);
      border-bottom: 1px solid rgba(148, 163, 184, 0.12);
    }

    .site-header .header-top {
      border-bottom: 1px solid rgba(148, 163, 184, 0.08);
    }

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

    .logo-icon {
      width: 38px;
      height: 38px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: 12px;
      background: linear-gradient(135deg, rgba(30, 168, 230, 0.2), rgba(45, 227, 192, 0.12));
      border: 1px solid rgba(30, 168, 230, 0.35);
      color: var(--primary);
      flex-shrink: 0;
    }

    .logo-text {
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--text-primary);
      letter-spacing: 0.01em;
    }

    .logo-text strong {
      background: linear-gradient(90deg, var(--primary), var(--accent));
      -webkit-background-clip: text;
      background-clip: text;
      -webkit-text-fill-color: transparent;
      font-weight: 800;
    }

    .search-form {
      display: flex;
      align-items: center;
      background: rgba(15, 23, 42, 0.55);
      border: 1px solid rgba(148, 163, 184, 0.16);
      border-radius: 999px;
      padding: 6px 8px 6px 16px;
      width: 320px;
      transition: border-color 0.2s, box-shadow 0.2s;
    }

    .search-form:focus-within {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(30, 168, 230, 0.15);
    }

    .search-form input {
      background: transparent;
      border: 0;
      outline: none;
      color: var(--text-primary);
      font-size: 0.875rem;
      flex: 1;
      min-width: 0;
    }

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

    .search-form button {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      background: rgba(30, 168, 230, 0.15);
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border: 0;
      cursor: pointer;
      transition: background 0.2s;
      flex-shrink: 0;
    }

    .search-form button:hover {
      background: rgba(30, 168, 230, 0.3);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 14px;
    }

    .header-login {
      color: var(--text-secondary);
      font-size: 0.875rem;
      font-weight: 600;
      transition: color 0.2s;
    }

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

    .header-nav {
      position: relative;
    }

    .nav-tabs-wrap {
      position: relative;
      overflow: hidden;
    }

    .nav-tabs {
      display: flex;
      gap: 8px;
      padding: 10px 0;
      list-style: none;
      overflow-x: auto;
      white-space: nowrap;
      scrollbar-width: none;
      -ms-overflow-style: none;
    }

    .nav-tabs::-webkit-scrollbar {
      display: none;
    }

    .nav-tabs li {
      flex-shrink: 0;
    }

    .nav-tabs a {
      display: inline-block;
      padding: 6px 16px;
      border-radius: 999px;
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--text-secondary);
      border: 1px solid transparent;
      transition: all 0.2s;
    }

    .nav-tabs a:hover {
      color: var(--primary);
      border-color: rgba(30, 168, 230, 0.3);
    }

    .nav-tabs a.active {
      color: #fff;
      background: rgba(30, 168, 230, 0.18);
      border-color: rgba(30, 168, 230, 0.4);
      box-shadow: 0 0 16px rgba(30, 168, 230, 0.15);
    }

    .nav-fade {
      position: absolute;
      top: 0;
      bottom: 0;
      width: 40px;
      z-index: 2;
      pointer-events: none;
    }

    .nav-fade-left {
      left: 0;
      background: linear-gradient(90deg, rgba(7, 11, 20, 0.9), transparent);
    }

    .nav-fade-right {
      right: 0;
      background: linear-gradient(-90deg, rgba(7, 11, 20, 0.9), transparent);
    }

    /* ===== Buttons ===== */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      border-radius: var(--radius-sm);
      font-weight: 700;
      min-height: 48px;
      padding: 0 24px;
      font-size: 0.95rem;
      border: 0;
      cursor: pointer;
      transition: all 0.25s ease;
    }

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

    .btn-cta {
      background: linear-gradient(135deg, var(--cta), var(--cta-deep));
      color: #1F1F1F;
      box-shadow: 0 0 20px rgba(245, 158, 11, 0.3);
    }

    .btn-cta:hover {
      box-shadow: 0 0 32px rgba(245, 158, 11, 0.5);
      transform: translateY(-1px);
      filter: brightness(1.05);
    }

    .btn-cta:active {
      transform: translateY(1px);
    }

    .btn-ghost {
      background: rgba(15, 23, 42, 0.55);
      border: 1px solid rgba(30, 168, 230, 0.4);
      color: var(--primary);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
    }

    .btn-ghost:hover {
      background: rgba(30, 168, 230, 0.1);
      box-shadow: 0 0 20px rgba(30, 168, 230, 0.12);
    }

    .btn-sm {
      min-height: 38px;
      padding: 0 16px;
      font-size: 0.85rem;
    }

    /* ===== Section ===== */
    .section {
      padding: 96px 0;
    }

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

    .section-header {
      text-align: center;
      margin-bottom: 48px;
      max-width: 720px;
      margin-left: auto;
      margin-right: auto;
    }

    .section-header h2 {
      font-size: clamp(1.6rem, 2.8vw, 2.2rem);
      font-weight: 700;
      line-height: 1.3;
    }

    .section-header p {
      color: var(--text-secondary);
      margin-top: 8px;
      font-size: 0.95rem;
    }

    .section-eyebrow {
      display: inline-block;
      font-size: 0.72rem;
      font-weight: 700;
      letter-spacing: 0.04em;
      text-transform: uppercase;
      color: var(--accent);
      background: rgba(45, 227, 192, 0.12);
      border: 1px solid rgba(45, 227, 192, 0.2);
      border-radius: 999px;
      padding: 4px 14px;
      margin-bottom: 16px;
    }

    /* ===== Glass card ===== */
    .glass-card {
      background: var(--glass-bg);
      backdrop-filter: blur(16px) saturate(150%);
      -webkit-backdrop-filter: blur(16px) saturate(150%);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-card);
      transition: all 0.3s ease;
    }

    .glass-card:hover {
      border-color: rgba(148, 163, 184, 0.28);
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }

    /* ===== Hero ===== */
    .hero {
      position: relative;
      padding: 72px 0 80px;
      min-height: 72vh;
      display: flex;
      align-items: center;
      isolation: isolate;
    }

    .hero-bg {
      position: absolute;
      inset: 0;
      background-size: cover;
      background-position: center;
      z-index: -2;
    }

    .hero-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(7, 11, 20, 0.92) 20%, rgba(7, 11, 20, 0.65) 55%, rgba(7, 11, 20, 0.35));
      z-index: -1;
    }

    .hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(120deg, transparent, rgba(30, 168, 230, 0.1), transparent);
      z-index: -1;
      pointer-events: none;
    }

    .hero-breadcrumb {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.8rem;
      color: var(--text-muted);
      margin-bottom: 24px;
    }

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

    .hero-breadcrumb .current {
      color: var(--text-secondary);
    }

    .hero-badge {
      display: inline-block;
      padding: 5px 14px;
      font-size: 0.75rem;
      font-weight: 700;
      letter-spacing: 0.02em;
      color: var(--accent);
      background: rgba(45, 227, 192, 0.1);
      border: 1px solid rgba(45, 227, 192, 0.25);
      border-radius: 999px;
      margin-bottom: 20px;
    }

    .hero h1 {
      font-size: clamp(2rem, 4vw, 3.1rem);
      font-weight: 800;
      line-height: 1.15;
      margin-bottom: 16px;
    }

    .gradient-text {
      background: linear-gradient(92deg, var(--primary), var(--accent));
      -webkit-background-clip: text;
      background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-sub {
      color: var(--text-secondary);
      font-size: 1.05rem;
      max-width: 500px;
      margin-bottom: 32px;
    }

    .hero-actions {
      display: flex;
      gap: 14px;
      flex-wrap: wrap;
      margin-bottom: 36px;
    }

    .hero-trust {
      display: flex;
      flex-wrap: wrap;
      gap: 10px 18px;
    }

    .hero-trust span {
      font-size: 0.78rem;
      font-weight: 600;
      color: var(--text-secondary);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .hero-trust span::before {
      content: "";
      width: 5px;
      height: 5px;
      border-radius: 50%;
      background: var(--accent);
      box-shadow: 0 0 8px rgba(45, 227, 192, 0.6);
    }

    .hero-frame {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid rgba(148, 163, 184, 0.16);
      box-shadow: 0 24px 80px rgba(2, 6, 23, 0.55);
    }

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

    .hero-frame-meta {
      position: absolute;
      left: 16px;
      right: 16px;
      bottom: 16px;
      background: rgba(7, 11, 20, 0.75);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border: 1px solid rgba(148, 163, 184, 0.14);
      border-radius: 14px;
      padding: 14px 16px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .version-badge {
      display: inline-block;
      background: rgba(30, 168, 230, 0.2);
      color: var(--primary);
      font-size: 0.75rem;
      font-weight: 700;
      border-radius: 999px;
      padding: 3px 10px;
      border: 1px solid rgba(30, 168, 230, 0.3);
    }

    .hero-frame-info {
      display: flex;
      gap: 12px;
      font-size: 0.75rem;
      color: var(--text-secondary);
    }

    .hero-float-card {
      position: absolute;
      padding: 10px 14px;
      font-size: 0.78rem;
      font-weight: 600;
      color: var(--text-primary);
      border-radius: 12px;
      z-index: 3;
      animation: floatY 3.5s ease-in-out infinite alternate;
    }

    .float-card-1 {
      top: -14px;
      right: 10px;
    }

    .float-card-2 {
      bottom: 64px;
      left: -16px;
      animation-delay: 1.2s;
    }

    @keyframes floatY {
      from {
        transform: translateY(-4px);
      }
      to {
        transform: translateY(6px);
      }
    }

    /* ===== Version cards ===== */
    .version-card {
      background: linear-gradient(180deg, rgba(15, 23, 42, 0.8), rgba(11, 18, 32, 0.92));
      border: 1px solid rgba(30, 168, 230, 0.12);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }

    .version-card:hover {
      border-color: rgba(30, 168, 230, 0.32);
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }

    .version-cover {
      position: relative;
      aspect-ratio: 16/9;
      overflow: hidden;
    }

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

    .version-card:hover .version-cover img {
      transform: scale(1.04);
    }

    .version-cover .version-chip {
      position: absolute;
      top: 12px;
      left: 12px;
      background: rgba(7, 11, 20, 0.8);
      backdrop-filter: blur(8px);
      color: var(--accent);
      font-size: 0.72rem;
      font-weight: 700;
      border-radius: 999px;
      padding: 3px 10px;
      border: 1px solid rgba(45, 227, 192, 0.25);
    }

    .version-body {
      padding: 20px 20px 24px;
      display: flex;
      flex-direction: column;
      flex: 1;
    }

    .version-body h3 {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 6px;
    }

    .version-meta {
      font-size: 0.78rem;
      color: var(--text-muted);
      margin-bottom: 10px;
      display: flex;
      gap: 12px;
    }

    .version-desc {
      font-size: 0.88rem;
      color: var(--text-secondary);
      line-height: 1.65;
      flex: 1;
      margin-bottom: 16px;
    }

    /* ===== Flow steps ===== */
    .flow-steps {
      position: relative;
    }

    .step-item {
      position: relative;
      padding: 24px;
      border-radius: var(--radius-md);
      background: rgba(15, 23, 42, 0.5);
      border: 1px solid rgba(148, 163, 184, 0.1);
      transition: border-color 0.25s, box-shadow 0.25s, transform 0.25s;
    }

    .step-item:hover {
      border-color: rgba(30, 168, 230, 0.25);
      box-shadow: 0 12px 40px rgba(2, 6, 23, 0.4);
      transform: translateY(-3px);
    }

    .step-num {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: linear-gradient(135deg, rgba(30, 168, 230, 0.15), rgba(45, 227, 192, 0.08));
      border: 1px solid rgba(30, 168, 230, 0.4);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1rem;
      margin-bottom: 14px;
      box-shadow: 0 0 14px rgba(30, 168, 230, 0.12);
    }

    .step-item h3 {
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 6px;
    }

    .step-item p {
      font-size: 0.85rem;
      color: var(--text-secondary);
      line-height: 1.6;
    }

    /* ===== Security ===== */
    .security-panel {
      background: linear-gradient(135deg, rgba(11, 18, 32, 0.95), rgba(13, 24, 40, 0.98));
      border: 1px solid rgba(30, 168, 230, 0.14);
      border-radius: var(--radius-lg);
      padding: 40px;
    }

    .security-panel h2 {
      font-size: clamp(1.5rem, 2.4vw, 2rem);
      font-weight: 700;
      margin-bottom: 8px;
    }

    .security-panel>p {
      color: var(--text-secondary);
      margin-bottom: 28px;
      max-width: 540px;
    }

    .security-list {
      list-style: none;
      display: grid;
      gap: 16px;
    }

    .security-list li {
      display: flex;
      gap: 12px;
      align-items: flex-start;
      font-size: 0.9rem;
      color: var(--text-secondary);
    }

    .security-list li .check-icon {
      width: 22px;
      height: 22px;
      border-radius: 50%;
      background: rgba(45, 227, 192, 0.15);
      border: 1px solid rgba(45, 227, 192, 0.3);
      color: var(--accent);
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
      margin-top: 2px;
    }

    .security-side-card {
      border: 1px solid rgba(30, 168, 230, 0.2);
      background: linear-gradient(160deg, rgba(15, 23, 42, 0.75), rgba(11, 18, 32, 0.85));
      border-radius: var(--radius-lg);
      padding: 36px 28px;
      text-align: center;
      box-shadow: var(--shadow-card);
      position: relative;
      overflow: hidden;
    }

    .security-side-card::after {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 2px;
      background: linear-gradient(90deg, transparent, var(--primary), var(--accent), transparent);
    }

    .shield-wrap {
      width: 72px;
      height: 72px;
      margin: 0 auto 18px;
      border-radius: 20px;
      background: rgba(45, 227, 192, 0.12);
      border: 1px solid rgba(45, 227, 192, 0.3);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--accent);
    }

    .security-side-card h3 {
      font-size: 1.2rem;
      font-weight: 700;
      margin-bottom: 6px;
    }

    .security-side-card p {
      font-size: 0.85rem;
      color: var(--text-secondary);
      margin-bottom: 20px;
    }

    .security-metric {
      display: inline-block;
      font-size: 0.75rem;
      color: var(--accent);
      background: rgba(45, 227, 192, 0.08);
      border: 1px solid rgba(45, 227, 192, 0.2);
      border-radius: 999px;
      padding: 4px 12px;
      margin-top: 12px;
    }

    /* ===== Timeline ===== */
    .timeline {
      list-style: none;
      position: relative;
      max-width: 760px;
      margin: 0 auto;
    }

    .timeline::before {
      content: "";
      position: absolute;
      left: 8px;
      top: 0;
      bottom: 0;
      width: 2px;
      background: linear-gradient(180deg, rgba(30, 168, 230, 0.4), rgba(45, 227, 192, 0.2));
    }

    .timeline-item {
      position: relative;
      padding-left: 36px;
      padding-bottom: 28px;
    }

    .timeline-item:last-child {
      padding-bottom: 0;
    }

    .timeline-item::before {
      content: "";
      position: absolute;
      left: 3px;
      top: 6px;
      width: 12px;
      height: 12px;
      border-radius: 50%;
      background: var(--primary);
      box-shadow: 0 0 0 4px rgba(30, 168, 230, 0.15), 0 0 12px var(--primary-glow);
    }

    .timeline-item h3 {
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 4px;
    }

    .timeline-item .timeline-date {
      font-size: 0.78rem;
      color: var(--text-muted);
      margin-bottom: 4px;
    }

    .timeline-item p {
      font-size: 0.88rem;
      color: var(--text-secondary);
    }

    /* ===== FAQ ===== */
    .faq-list {
      max-width: 780px;
      margin: 0 auto;
      display: grid;
      gap: 12px;
    }

    .faq-item {
      border: 1px solid rgba(148, 163, 184, 0.16);
      border-radius: 12px;
      background: rgba(15, 23, 42, 0.45);
      transition: border-color 0.25s, box-shadow 0.25s;
      overflow: hidden;
    }

    .faq-item:hover {
      border-color: rgba(30, 168, 230, 0.25);
    }

    .faq-item[open] {
      border-color: rgba(30, 168, 230, 0.35);
      box-shadow: 0 0 20px rgba(30, 168, 230, 0.06);
    }

    .faq-item summary {
      padding: 16px 20px;
      cursor: pointer;
      font-weight: 600;
      font-size: 0.95rem;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      list-style: none;
      outline: none;
    }

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

    .faq-item summary::after {
      content: "+";
      font-size: 1.2rem;
      color: var(--primary);
      font-weight: 400;
      transition: transform 0.25s;
      flex-shrink: 0;
    }

    .faq-item[open] summary::after {
      transform: rotate(45deg);
    }

    .faq-item .faq-body {
      padding: 0 20px 18px;
      font-size: 0.9rem;
      color: var(--text-secondary);
      line-height: 1.7;
    }

    /* ===== CTA ===== */
    .cta-section {
      position: relative;
      padding: 80px 0;
      isolation: isolate;
      border-radius: 0;
    }

    .cta-bg {
      position: absolute;
      inset: 0;
      background-size: cover;
      background-position: center;
      z-index: -2;
    }

    .cta-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(7, 11, 20, 0.92), rgba(11, 18, 32, 0.78));
      z-index: -1;
    }

    .cta-inner {
      text-align: center;
      max-width: 680px;
      margin: 0 auto;
      padding: 48px 40px;
      border-radius: var(--radius-lg);
      background: rgba(15, 23, 42, 0.55);
      backdrop-filter: blur(16px) saturate(150%);
      -webkit-backdrop-filter: blur(16px) saturate(150%);
      border: 1px solid rgba(148, 163, 184, 0.14);
    }

    .cta-inner h2 {
      font-size: clamp(1.5rem, 3vw, 2.2rem);
      font-weight: 700;
      margin-bottom: 12px;
      line-height: 1.3;
    }

    .cta-inner p {
      color: var(--text-secondary);
      margin-bottom: 28px;
      font-size: 0.95rem;
    }

    .cta-note {
      margin-top: 16px;
      font-size: 0.78rem;
      color: var(--text-muted);
    }

    /* ===== Footer ===== */
    .site-footer {
      background: #050910;
      color: var(--text-muted);
      padding: 64px 0 0;
      margin-top: 0;
      border-top: 1px solid rgba(148, 163, 184, 0.06);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      padding-bottom: 40px;
      border-bottom: 1px solid rgba(148, 163, 184, 0.08);
    }

    .footer-brand .logo {
      margin-bottom: 14px;
    }

    .footer-brand p {
      font-size: 0.85rem;
      line-height: 1.7;
      max-width: 320px;
      color: var(--text-muted);
    }

    .footer-col h4 {
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 14px;
    }

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

    .footer-col ul a {
      font-size: 0.84rem;
      color: var(--text-muted);
      transition: color 0.2s;
    }

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

    .footer-security {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      padding: 24px 0;
      border-bottom: 1px solid rgba(148, 163, 184, 0.08);
      align-items: center;
    }

    .security-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 0.8rem;
      font-weight: 600;
      color: var(--text-secondary);
      background: rgba(30, 168, 230, 0.08);
      border: 1px solid rgba(30, 168, 230, 0.18);
      border-radius: 999px;
      padding: 6px 14px;
    }

    .security-badge.dark {
      background: rgba(148, 163, 184, 0.06);
      border-color: rgba(148, 163, 184, 0.12);
    }

    .footer-copyright {
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      gap: 12px;
      padding: 20px 0;
      font-size: 0.78rem;
      color: var(--text-muted);
    }

    .footer-icp {
      color: rgba(148, 163, 184, 0.4);
    }

    /* ===== Responsive ===== */
    @media (max-width: 1023px) {
      .search-form {
        width: 240px;
      }

      .hero {
        padding: 64px 0;
      }

      .hero-float-card {
        display: none;
      }

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

    @media (max-width: 767px) {
      .section {
        padding: 64px 0;
      }

      .header-search {
        display: none;
      }

      .hero {
        min-height: auto;
        padding: 48px 0 56px;
        text-align: center;
      }

      .hero-sub {
        margin-left: auto;
        margin-right: auto;
      }

      .hero-actions {
        justify-content: center;
      }

      .hero-trust {
        justify-content: center;
      }

      .hero-visual {
        margin-top: 32px;
      }

      .hero h1 {
        font-size: clamp(1.7rem, 5vw, 2.3rem);
      }

      .header-actions .btn-sm {
        min-height: 36px;
        padding: 0 12px;
        font-size: 0.8rem;
      }

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

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

      .footer-copyright {
        flex-direction: column;
      }

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

      .security-panel {
        padding: 28px 20px;
      }

      .hero-breadcrumb {
        justify-content: center;
      }
    }

    @media (max-width: 520px) {
      .nav-tabs a {
        font-size: 0.8rem;
        padding: 5px 12px;
      }

      .header-actions {
        gap: 8px;
      }

      .header-login {
        display: none;
      }

      .btn {
        font-size: 0.88rem;
        min-height: 44px;
      }

      .hero-actions {
        flex-direction: column;
      }

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

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

      .version-body {
        padding: 16px;
      }
    }

    /* ===== Misc ===== */
    .reveal {
      opacity: 1;
      transform: none;
    }

/* roulang page: article */
:root {
    --bg-base: #070B14;
    --bg-deep: #0B1220;
    --primary: #1EA8E6;
    --primary-glow: rgba(30, 168, 230, 0.45);
    --accent: #2DE3C0;
    --cta: #F59E0B;
    --warn: #F43F5E;
    --text-primary: #F1F5F9;
    --text-secondary: rgba(226, 232, 240, 0.72);
    --text-muted: rgba(148, 163, 184, 0.6);
    --card-bg: rgba(15, 23, 42, 0.55);
    --card-border: rgba(148, 163, 184, 0.14);
    --radius-btn: 10px;
    --radius-card: 16px;
    --shadow-card: 0 12px 40px rgba(2, 6, 23, 0.45);
    --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
section[id] { scroll-margin-top: 120px; }
body {
    font-family: var(--font-sans);
    background: var(--bg-base);
    background-image: radial-gradient(ellipse at 20% -10%, rgba(30, 168, 230, 0.12), transparent 50%), radial-gradient(ellipse at 100% 100%, rgba(45, 227, 192, 0.06), transparent 40%);
    color: var(--text-primary);
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}
.container { max-width: 1200px; margin: 0 auto; }
@media (min-width: 1024px) {
    .container { padding-left: 24px; padding-right: 24px; }
}
@media (max-width: 767px) {
    .container { padding-left: 16px; padding-right: 16px; }
}
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }
button { font-family: inherit; }
::selection { background: rgba(30, 168, 230, 0.3); color: #fff; }

/* 按钮系统 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 40px;
    padding: 10px 24px;
    border-radius: var(--radius-btn);
    font-weight: 700;
    font-size: 0.95rem;
    border: none;
    cursor: pointer;
    transition: all .25s ease;
    line-height: 1.2;
    white-space: nowrap;
    text-align: center;
}
.btn-sm { min-height: 36px; padding: 6px 18px; font-size: 0.875rem; }
.btn-lg { min-height: 48px; padding: 14px 32px; font-size: 1rem; }
.btn-cta {
    background: linear-gradient(135deg, #F59E0B, #D97706);
    color: #1F1F1F;
    box-shadow: 0 0 20px rgba(245, 158, 11, 0.25);
}
.btn-cta:hover {
    background: linear-gradient(135deg, #FBBF24, #F59E0B);
    box-shadow: 0 0 32px rgba(245, 158, 11, 0.5);
    transform: translateY(-2px);
}
.btn-cta:active { transform: translateY(0); box-shadow: 0 0 16px rgba(245, 158, 11, 0.35); }
.btn-cta:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.btn-ghost {
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid rgba(30, 168, 230, 0.45);
    color: var(--primary);
}
.btn-ghost:hover {
    background: rgba(30, 168, 230, 0.12);
    box-shadow: 0 0 20px rgba(30, 168, 230, 0.15);
    transform: translateY(-2px);
}
.btn-ghost:active { transform: translateY(0); }
.btn-ghost:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }

/* 导航 */
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(7, 11, 20, 0.85);
    backdrop-filter: blur(16px) saturate(150%);
    -webkit-backdrop-filter: blur(16px) saturate(150%);
    border-bottom: 1px solid rgba(148, 163, 184, 0.12);
}
.header-top { border-bottom: 1px solid rgba(148, 163, 184, 0.08); }
.header-top .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
}
.logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 1.02rem;
    flex-shrink: 0;
}
.logo-icon {
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(30, 168, 230, 0.15);
    border: 1px solid rgba(30, 168, 230, 0.3);
    border-radius: 10px;
    color: var(--primary);
    flex-shrink: 0;
}
.logo-text { color: var(--text-primary); font-weight: 500; white-space: nowrap; }
.logo-text strong { color: var(--primary); font-weight: 800; margin-right: 2px; }
.search-form {
    display: flex;
    align-items: center;
    width: 320px;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid rgba(148, 163, 184, 0.2);
    border-radius: 999px;
    overflow: hidden;
    transition: border-color .25s, box-shadow .25s;
}
.search-form input {
    flex: 1;
    min-width: 0;
    background: transparent;
    border: none;
    outline: none;
    padding: 9px 16px;
    color: var(--text-primary);
    font-size: 0.85rem;
}
.search-form input::placeholder { color: var(--text-muted); }
.search-form button {
    padding: 8px 16px;
    color: var(--text-muted);
    background: transparent;
    border: none;
    cursor: pointer;
    transition: color .2s;
    display: flex;
    align-items: center;
    justify-content: center;
}
.search-form button:hover { color: var(--primary); }
.search-form:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 1px var(--primary-glow);
}
.header-actions { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.header-login { font-size: 0.88rem; color: var(--text-secondary); transition: color .2s; }
.header-login:hover { color: var(--primary); }
.header-nav { border-top: 1px solid rgba(148, 163, 184, 0.08); }
.nav-tabs-wrap { position: relative; }
.nav-tabs {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding: 12px 0;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}
.nav-tabs::-webkit-scrollbar { display: none; }
.nav-tabs li { flex-shrink: 0; }
.nav-tabs a {
    display: flex;
    align-items: center;
    padding: 8px 20px;
    border-radius: 999px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    border: 1px solid transparent;
    transition: all .25s ease;
    white-space: nowrap;
}
.nav-tabs a:hover {
    color: var(--text-primary);
    border-color: rgba(30, 168, 230, 0.3);
    background: rgba(30, 168, 230, 0.08);
}
.nav-tabs a.active {
    color: #fff;
    background: rgba(30, 168, 230, 0.15);
    border-color: rgba(30, 168, 230, 0.4);
    box-shadow: 0 0 16px rgba(30, 168, 230, 0.15);
}
.nav-tabs a:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 999px; }
.nav-fade {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 32px;
    pointer-events: none;
    z-index: 2;
}
.nav-fade-left { left: 0; background: linear-gradient(to right, var(--bg-base), transparent); }
.nav-fade-right { right: 0; background: linear-gradient(to left, var(--bg-base), transparent); }

/* 面包屑 */
.breadcrumb-wrap {
    padding: 20px 0 4px;
}
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-muted);
    overflow-x: auto;
    white-space: nowrap;
    scrollbar-width: none;
    padding: 4px 0;
}
.breadcrumb::-webkit-scrollbar { display: none; }
.breadcrumb a { color: var(--text-muted); transition: color .2s; }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { color: rgba(148, 163, 184, 0.4); flex-shrink: 0; }
.breadcrumb .current { color: var(--text-secondary); overflow: hidden; text-overflow: ellipsis; max-width: 300px; }

/* 文章主体 */
.page-main { flex: 1; padding-bottom: 40px; }
.article-layout { padding: 24px 0 8px; }
.article-card {
    background: var(--card-bg);
    backdrop-filter: blur(16px) saturate(150%);
    -webkit-backdrop-filter: blur(16px) saturate(150%);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    box-shadow: var(--shadow-card);
    padding: 40px;
    max-width: 860px;
    margin: 0 auto;
    transition: border-color .3s;
}
.article-card:hover { border-color: rgba(148, 163, 184, 0.22); }
.article-header { margin-bottom: 32px; }
.article-header h1 {
    font-size: clamp(1.6rem, 2.8vw, 2.2rem);
    font-weight: 800;
    line-height: 1.3;
    color: var(--text-primary);
    margin-bottom: 20px;
    letter-spacing: 0.01em;
}
.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 18px;
    font-size: 0.82rem;
    color: var(--text-muted);
    padding-top: 18px;
    border-top: 1px solid rgba(148, 163, 184, 0.1);
}
.article-meta span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.article-meta svg { color: var(--primary); opacity: 0.8; }

/* 正文排版 */
.article-content {
    font-size: 1.05rem;
    line-height: 1.85;
    color: var(--text-secondary);
}
.article-content p { margin-bottom: 1.25em; }
.article-content h2 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin: 2em 0 0.8em;
    font-weight: 700;
    padding-left: 12px;
    border-left: 3px solid var(--primary);
    line-height: 1.4;
}
.article-content h3 {
    font-size: 1.25rem;
    color: var(--text-primary);
    margin: 1.5em 0 0.6em;
    font-weight: 600;
}
.article-content h4 {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin: 1.25em 0 0.5em;
    font-weight: 600;
}
.article-content img {
    border-radius: 12px;
    margin: 1.5em 0;
    box-shadow: var(--shadow-card);
}
.article-content blockquote {
    border-left: 3px solid var(--accent);
    background: rgba(45, 227, 192, 0.06);
    padding: 16px 20px;
    border-radius: 0 12px 12px 0;
    margin: 1.5em 0;
    color: var(--text-secondary);
}
.article-content ul,
.article-content ol {
    margin: 1em 0 1.25em;
    padding-left: 1.5em;
}
.article-content ul { list-style: disc; }
.article-content ol { list-style: decimal; }
.article-content li { margin-bottom: 0.4em; }
.article-content code {
    background: rgba(30, 168, 230, 0.1);
    color: var(--accent);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.9em;
}
.article-content pre {
    background: var(--bg-deep);
    border: 1px solid rgba(148, 163, 184, 0.12);
    padding: 16px 20px;
    border-radius: 12px;
    overflow-x: auto;
    margin: 1.5em 0;
}
.article-content pre code { background: none; padding: 0; color: var(--text-secondary); }
.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5em 0;
    font-size: 0.9rem;
}
.article-content th,
.article-content td {
    padding: 10px 14px;
    border: 1px solid rgba(148, 163, 184, 0.15);
    text-align: left;
}
.article-content th { background: rgba(30, 168, 230, 0.08); color: var(--text-primary); font-weight: 600; }
.article-content a { color: var(--primary); border-bottom: 1px solid transparent; transition: border-color .2s; }
.article-content a:hover { border-color: var(--primary); }

/* 标签 */
.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid rgba(148, 163, 184, 0.12);
}
.tag-pill {
    display: inline-flex;
    align-items: center;
    font-size: 0.78rem;
    background: rgba(30, 168, 230, 0.12);
    color: var(--primary);
    border: 1px solid rgba(30, 168, 230, 0.25);
    padding: 6px 14px;
    border-radius: 999px;
    transition: all .2s;
    cursor: default;
}
.tag-pill:hover {
    background: rgba(30, 168, 230, 0.28);
    border-color: rgba(30, 168, 230, 0.45);
}

/* 上下篇 */
.article-pager {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 36px;
}
.pager-link {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 16px 20px;
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid rgba(148, 163, 184, 0.14);
    border-radius: 14px;
    transition: all .25s;
}
.pager-link:hover {
    border-color: rgba(30, 168, 230, 0.4);
    background: rgba(30, 168, 230, 0.08);
    transform: translateY(-2px);
}
.pager-link:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.pager-label { font-size: 0.75rem; color: var(--text-muted); }
.pager-title { font-size: 0.9rem; color: var(--text-primary); font-weight: 600; line-height: 1.4; }
.pager-next { text-align: right; }

/* 软 CTA 条 */
.soft-cta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-top: 36px;
    padding: 20px 24px;
    background: linear-gradient(135deg, rgba(30, 168, 230, 0.12), rgba(45, 227, 192, 0.06));
    border: 1px solid rgba(30, 168, 230, 0.25);
    border-radius: 16px;
}
.soft-cta p { font-size: 0.95rem; color: var(--text-primary); font-weight: 600; }
.soft-cta .btn { flex-shrink: 0; }

/* 空状态 */
.article-empty {
    text-align: center;
    padding: 72px 20px;
}
.empty-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(148, 163, 184, 0.1);
    border-radius: 50%;
    color: rgba(148, 163, 184, 0.7);
}
.article-empty h1 { font-size: 1.8rem; margin-bottom: 12px; color: var(--text-primary); }
.article-empty p { color: var(--text-secondary); margin-bottom: 28px; font-size: 0.95rem; }

/* 相关推荐 */
.related-section { margin-top: 56px; }
.section-title {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
}
.section-title .bar {
    width: 4px;
    height: 22px;
    background: linear-gradient(to bottom, var(--primary), var(--accent));
    border-radius: 2px;
    flex-shrink: 0;
}
.section-title h2 { font-size: 1.5rem; font-weight: 700; color: var(--text-primary); }
.card-grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}
.news-card {
    background: var(--card-bg);
    backdrop-filter: blur(16px) saturate(150%);
    -webkit-backdrop-filter: blur(16px) saturate(150%);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-card);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: all .3s ease;
}
.news-card:hover {
    transform: translateY(-4px);
    border-color: rgba(148, 163, 184, 0.28);
    box-shadow: 0 20px 60px rgba(30, 168, 230, 0.18);
}
.news-card:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.news-card .card-cover {
    aspect-ratio: 16 / 9;
    overflow: hidden;
    border-radius: 12px 12px 0 0;
    background: var(--bg-deep);
}
.news-card .card-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .4s ease;
}
.news-card:hover .card-cover img { transform: scale(1.04); }
.news-card .card-body {
    padding: 18px 20px 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex: 1;
}
.news-card .card-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.5;
    transition: color .2s;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.news-card:hover .card-title { color: var(--primary); }
.news-card .card-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.6;
    margin-bottom: 4px;
}
.news-card .card-meta { font-size: 0.78rem; color: var(--text-muted); margin-top: auto; }

/* CTA 区 */
.cta-section {
    margin-top: 64px;
    position: relative;
    border-radius: 24px;
    overflow: hidden;
    padding: 56px 40px;
    text-align: center;
    background: url('/assets/images/backpic/back-2.webp') center / cover no-repeat;
}
.cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(7, 11, 20, 0.92), rgba(7, 11, 20, 0.72));
}
.cta-inner { position: relative; z-index: 1; max-width: 640px; margin: 0 auto; }
.cta-inner h2 { font-size: clamp(1.6rem, 2.6vw, 2rem); margin-bottom: 14px; color: #fff; font-weight: 800; line-height: 1.3; }
.cta-inner p { color: var(--text-secondary); margin-bottom: 28px; font-size: 0.95rem; }
.cta-note { font-size: 0.75rem; color: var(--text-muted); margin-top: 16px; }

/* 页脚 */
.site-footer {
    margin-top: 80px;
    background: #05080F;
    border-top: 1px solid rgba(148, 163, 184, 0.08);
    padding: 56px 0 24px;
    color: var(--text-muted);
    flex-shrink: 0;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(148, 163, 184, 0.08);
}
.footer-brand p { margin-top: 14px; font-size: 0.9rem; max-width: 320px; line-height: 1.7; }
.footer-col h4 { color: var(--text-primary); font-size: 0.95rem; margin-bottom: 14px; font-weight: 600; }
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col a { font-size: 0.85rem; color: var(--text-muted); transition: color .2s; }
.footer-col a:hover { color: var(--primary); }
.footer-security {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    padding: 24px 0;
    border-bottom: 1px solid rgba(148, 163, 184, 0.08);
}
.security-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: 999px;
    font-size: 0.82rem;
    border: 1px solid rgba(245, 158, 11, 0.4);
    background: rgba(245, 158, 11, 0.08);
    color: #FBBF24;
}
.security-badge.dark {
    border-color: rgba(148, 163, 184, 0.2);
    background: rgba(148, 163, 184, 0.06);
    color: var(--text-secondary);
}
.footer-copyright {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 12px;
    font-size: 0.8rem;
    padding-top: 20px;
}

/* 滚动浮现动画 */
.js .reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.js .reveal.visible { opacity: 1; transform: translateY(0); }

/* 响应式 */
@media (max-width: 1023px) {
    .card-grid-3 { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .search-form { width: 260px; }
}
@media (max-width: 767px) {
    .card-grid-3 { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 28px; }
    .article-card { padding: 24px 20px; border-radius: 16px; }
    .article-pager { grid-template-columns: 1fr; }
    .pager-next { text-align: left; }
    .cta-section { padding: 40px 20px; border-radius: 18px; }
    .soft-cta { padding: 18px 16px; }
    .soft-cta .btn { width: 100%; }
    .btn-cta { width: auto; }
    .article-meta { gap: 12px; row-gap: 8px; flex-direction: column; align-items: flex-start; }
    .breadcrumb .current { max-width: 180px; }
    .footer-copyright { flex-direction: column; }
    .header-login { display: none; }
    .header-actions .btn-sm { min-height: 34px; padding: 4px 14px; font-size: 0.8rem; }
}
@media (max-width: 520px) {
    .article-header h1 { font-size: 1.4rem; }
    .article-content { font-size: 0.98rem; }
    .section-title h2 { font-size: 1.25rem; }
    .card-grid-3 { gap: 14px; }
}

/* roulang page: category2 */
:root {
            --bg-base: #070B14;
            --bg-deep: #0B1220;
            --primary: #1EA8E6;
            --primary-glow: rgba(30, 168, 230, 0.45);
            --accent: #2DE3C0;
            --cta: #F59E0B;
            --cta-deep: #D97706;
            --warn: #F43F5E;
            --text-primary: #F1F5F9;
            --text-secondary: rgba(226, 232, 240, 0.72);
            --text-muted: rgba(148, 163, 184, 0.6);
            --glass-bg: rgba(15, 23, 42, 0.55);
            --glass-border: rgba(148, 163, 184, 0.14);
            --radius-card: 16px;
            --radius-btn: 10px;
            --radius-badge: 999px;
            --shadow-card: 0 12px 40px rgba(2, 6, 23, 0.45);
            --shadow-hover: 0 20px 60px rgba(30, 168, 230, 0.18);
            --font-main: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

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

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color .2s ease, border-color .2s ease, box-shadow .2s ease, background .2s ease, transform .2s ease;
        }

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

        button {
            cursor: pointer;
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 6px;
        }

        .container {
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 48px;
            padding: 0 26px;
            border-radius: var(--radius-btn);
            font-weight: 700;
            font-size: 0.95rem;
            letter-spacing: 0.02em;
            transition: box-shadow .25s ease, transform .2s ease, background .25s ease, border-color .25s ease;
            white-space: nowrap;
        }
        .btn:active {
            transform: translateY(1px);
        }
        .btn-sm {
            min-height: 40px;
            padding: 0 20px;
            font-size: 0.88rem;
        }
        .btn-cta {
            background: linear-gradient(135deg, #F59E0B, #D97706);
            color: #1F1F1F;
            box-shadow: 0 0 20px rgba(245, 158, 11, 0.3);
        }
        .btn-cta:hover {
            box-shadow: 0 0 32px rgba(245, 158, 11, 0.5);
            filter: brightness(1.05);
            transform: translateY(-2px);
        }
        .btn-cta:active {
            filter: brightness(.96);
            transform: translateY(0);
        }
        .btn-ghost {
            background: rgba(30, 168, 230, 0.06);
            border: 1px solid rgba(30, 168, 230, 0.5);
            color: var(--primary);
        }
        .btn-ghost:hover {
            background: rgba(30, 168, 230, 0.12);
            transform: translateY(-2px);
            box-shadow: 0 0 18px rgba(30, 168, 230, 0.15);
        }
        .btn-ghost:active {
            transform: translateY(0);
        }

        /* ===== Badges & Pills ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 12px;
            border-radius: var(--radius-badge);
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            background: rgba(30, 168, 230, 0.12);
            color: var(--primary);
            border: 1px solid rgba(30, 168, 230, 0.2);
        }
        .badge-amber {
            background: rgba(245, 158, 11, 0.08);
            color: #F59E0B;
            border: 1px solid rgba(245, 158, 11, 0.35);
        }
        .pill {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 38px;
            padding: 0 20px;
            border-radius: var(--radius-badge);
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-secondary);
            background: rgba(15, 23, 42, 0.65);
            border: 1px solid rgba(148, 163, 184, 0.16);
            white-space: nowrap;
            transition: all .2s ease;
        }
        .pill:hover {
            color: var(--primary);
            border-color: rgba(30, 168, 230, 0.4);
            background: rgba(30, 168, 230, 0.08);
        }
        .pill.active {
            color: #fff;
            background: var(--primary);
            border-color: var(--primary);
            box-shadow: 0 0 18px rgba(30, 168, 230, 0.3);
        }

        /* ===== Glass Card ===== */
        .glass-card {
            background: rgba(15, 23, 42, 0.55);
            backdrop-filter: blur(16px) saturate(150%);
            -webkit-backdrop-filter: blur(16px) saturate(150%);
            border: 1px solid rgba(148, 163, 184, 0.14);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            transition: box-shadow .25s ease, transform .25s ease, border-color .25s ease;
        }
        .glass-card:hover {
            border-color: rgba(148, 163, 184, 0.28);
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        /* ===== Section ===== */
        .section {
            padding: 96px 0;
            position: relative;
        }
        .section-deep {
            background: var(--bg-deep);
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            font-size: 0.82rem;
            font-weight: 700;
            letter-spacing: 0.06em;
            color: var(--accent);
            text-transform: uppercase;
            margin-bottom: 12px;
        }
        .section-title {
            font-size: 1.75rem;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-primary);
            margin-bottom: 16px;
        }
        .section-desc {
            color: var(--text-secondary);
            font-size: 0.95rem;
            max-width: 640px;
            line-height: 1.75;
        }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(7, 11, 20, 0.85);
            backdrop-filter: blur(20px) saturate(160%);
            -webkit-backdrop-filter: blur(20px) saturate(160%);
            border-bottom: 1px solid transparent;
            transition: border-color .3s ease, box-shadow .3s ease;
        }
        .site-header.scrolled {
            border-bottom: 1px solid rgba(148, 163, 184, 0.12);
            box-shadow: 0 8px 32px rgba(2, 6, 23, 0.4);
        }
        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            color: #fff;
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            background: linear-gradient(135deg, rgba(30, 168, 230, 0.2), rgba(45, 227, 192, 0.1));
            border: 1px solid rgba(30, 168, 230, 0.3);
            color: var(--accent);
            flex-shrink: 0;
        }
        .logo-text {
            font-size: 1.05rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            color: #F1F5F9;
            line-height: 1.2;
        }
        .logo-text strong {
            background: linear-gradient(90deg, #1EA8E6, #2DE3C0);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            font-weight: 800;
            margin-right: 2px;
        }

        .search-form {
            display: flex;
            align-items: center;
            width: 320px;
            height: 40px;
            background: rgba(15, 23, 42, 0.7);
            border: 1px solid rgba(148, 163, 184, 0.18);
            border-radius: var(--radius-badge);
            padding: 0 6px 0 16px;
            transition: border-color .2s, box-shadow .2s;
        }
        .search-form:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(30, 168, 230, 0.12);
        }
        .search-form input {
            flex: 1;
            background: transparent;
            border: none;
            color: var(--text-primary);
            font-size: 0.85rem;
            min-width: 0;
        }
        .search-form input::placeholder {
            color: var(--text-muted);
        }
        .search-form button {
            flex-shrink: 0;
            width: 30px;
            height: 30px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            color: var(--text-muted);
            transition: all .2s;
        }
        .search-form button:hover {
            color: var(--primary);
            background: rgba(30, 168, 230, 0.1);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .header-login {
            font-size: 0.88rem;
            color: var(--text-secondary);
            padding: 6px 8px;
            border-radius: 8px;
        }
        .header-login:hover {
            color: var(--primary);
        }

        .header-nav {
            border-top: 1px solid rgba(148, 163, 184, 0.08);
            background: rgba(7, 11, 20, 0.45);
        }
        .nav-tabs-wrap {
            position: relative;
            overflow: hidden;
        }
        .nav-fade {
            position: absolute;
            top: 0;
            bottom: 0;
            width: 32px;
            z-index: 2;
            pointer-events: none;
        }
        .nav-fade-left {
            left: 0;
            background: linear-gradient(to right, rgba(7, 11, 20, 0.9), transparent);
        }
        .nav-fade-right {
            right: 0;
            background: linear-gradient(to left, rgba(7, 11, 20, 0.9), transparent);
        }
        .nav-tabs {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
            padding: 10px 0;
            overflow-x: auto;
            scrollbar-width: none;
            -webkit-overflow-scrolling: touch;
        }
        .nav-tabs::-webkit-scrollbar {
            display: none;
        }
        .nav-tabs a {
            display: inline-flex;
            align-items: center;
            min-height: 38px;
            padding: 0 20px;
            border-radius: var(--radius-badge);
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--text-secondary);
            background: transparent;
            border: 1px solid transparent;
            white-space: nowrap;
            transition: all .22s ease;
        }
        .nav-tabs a:hover {
            color: var(--primary);
            border-color: rgba(30, 168, 230, 0.3);
            background: rgba(30, 168, 230, 0.06);
        }
        .nav-tabs a.active {
            color: #fff;
            background: var(--primary);
            border-color: var(--primary);
            box-shadow: 0 0 18px rgba(30, 168, 230, 0.35);
        }

        /* ===== Hero ===== */
        .cat-hero {
            position: relative;
            min-height: 480px;
            display: flex;
            align-items: center;
            padding: 100px 0 72px;
            overflow: hidden;
            background-image: url('/assets/images/backpic/back-1.png');
            background-position: center;
            background-size: cover;
        }
        .cat-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(7, 11, 20, 0.92) 0%, rgba(7, 11, 20, 0.78) 50%, rgba(7, 11, 20, 0.6) 100%);
            z-index: 0;
        }
        .cat-hero::after {
            content: '';
            position: absolute;
            top: 0;
            right: -10%;
            width: 45%;
            height: 100%;
            background: linear-gradient(120deg, rgba(30, 168, 230, 0.18), transparent 70%);
            z-index: 0;
            pointer-events: none;
        }
        .cat-hero .container {
            position: relative;
            z-index: 1;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(30, 168, 230, 0.1);
            border: 1px solid rgba(30, 168, 230, 0.25);
            color: var(--accent);
            border-radius: var(--radius-badge);
            padding: 6px 16px;
            font-size: 0.82rem;
            font-weight: 600;
            margin-bottom: 24px;
            backdrop-filter: blur(12px);
        }
        .cat-hero h1 {
            font-size: clamp(2rem, 4vw, 3.2rem);
            font-weight: 800;
            line-height: 1.15;
            margin-bottom: 16px;
            color: #fff;
            letter-spacing: 0.01em;
        }
        .cat-hero .hero-sub {
            font-size: 1.3rem;
            font-weight: 600;
            color: var(--accent);
            margin-bottom: 16px;
            line-height: 1.4;
        }
        .cat-hero .hero-desc {
            font-size: 1rem;
            color: var(--text-secondary);
            max-width: 620px;
            line-height: 1.8;
            margin-bottom: 32px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 36px;
        }
        .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        .hero-meta .badge {
            background: rgba(7, 11, 20, 0.6);
            border-color: rgba(148, 163, 184, 0.18);
            color: var(--text-secondary);
            backdrop-filter: blur(8px);
        }

        /* ===== Sub navigation pills ===== */
        .subnav-section {
            border-bottom: 1px solid rgba(148, 163, 184, 0.1);
            background: rgba(11, 18, 32, 0.8);
            padding: 20px 0;
            position: relative;
            z-index: 5;
        }
        .subnav-pills {
            display: flex;
            gap: 10px;
            overflow-x: auto;
            scrollbar-width: none;
            padding: 4px 0;
        }
        .subnav-pills::-webkit-scrollbar {
            display: none;
        }

        /* ===== Stat cards ===== */
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .stat-card {
            text-align: center;
            padding: 32px 20px;
        }
        .stat-num {
            font-size: 2.5rem;
            font-weight: 800;
            line-height: 1.2;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            font-variant-numeric: tabular-nums;
        }
        .stat-label {
            font-size: 0.88rem;
            color: var(--text-secondary);
            margin-top: 8px;
        }

        /* ===== Features ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .feature-card {
            padding: 32px 28px;
            position: relative;
            overflow: hidden;
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--primary), transparent);
            opacity: 0.4;
        }
        .feature-icon {
            width: 52px;
            height: 52px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 14px;
            background: rgba(30, 168, 230, 0.12);
            border: 1px solid rgba(30, 168, 230, 0.2);
            color: var(--accent);
            margin-bottom: 20px;
        }
        .feature-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
        }
        .feature-card p {
            color: var(--text-secondary);
            font-size: 0.92rem;
            line-height: 1.7;
        }

        /* ===== Scenario ===== */
        .scenario-wrap {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .scenario-box {
            background: rgba(15, 23, 42, 0.45);
            border: 1px solid rgba(148, 163, 184, 0.14);
            border-radius: var(--radius-card);
            padding: 36px 28px;
            position: relative;
            overflow: hidden;
            transition: all .25s ease;
        }
        .scenario-box:hover {
            border-color: rgba(30, 168, 230, 0.3);
            transform: translateY(-3px);
            background: rgba(15, 23, 42, 0.7);
        }
        .scenario-num {
            font-size: 0.82rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.1em;
            margin-bottom: 14px;
            display: block;
        }
        .scenario-box h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 10px;
        }
        .scenario-box p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.7;
        }

        /* ===== Steps ===== */
        .steps-wrap {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            position: relative;
            counter-reset: step;
        }
        .steps-wrap::before {
            content: '';
            position: absolute;
            top: 24px;
            left: 10%;
            right: 10%;
            height: 1px;
            background: repeating-linear-gradient(to right, var(--primary) 0 8px, transparent 8px 16px);
            opacity: 0.3;
            z-index: 0;
        }
        .step-box {
            position: relative;
            z-index: 1;
            text-align: center;
            padding: 24px 16px 8px;
        }
        .step-dot {
            width: 48px;
            height: 48px;
            margin: 0 auto 16px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            font-weight: 700;
            background: rgba(30, 168, 230, 0.1);
            border: 1px solid rgba(30, 168, 230, 0.4);
            color: var(--primary);
            box-shadow: 0 0 0 8px rgba(30, 168, 230, 0.04);
        }
        .step-box h3 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        .step-box p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== Topic Cards ===== */
        .topic-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .topic-card {
            padding: 32px;
            display: flex;
            gap: 20px;
            background: rgba(15, 23, 42, 0.55);
            backdrop-filter: blur(16px) saturate(150%);
            -webkit-backdrop-filter: blur(16px) saturate(150%);
            border: 1px solid rgba(148, 163, 184, 0.14);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            transition: all .25s ease;
        }
        .topic-card:hover {
            transform: translateY(-4px);
            border-color: rgba(30, 168, 230, 0.3);
            box-shadow: var(--shadow-hover);
        }
        .topic-icon {
            width: 56px;
            height: 56px;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 16px;
            background: linear-gradient(135deg, rgba(30, 168, 230, 0.18), rgba(45, 227, 192, 0.08));
            border: 1px solid rgba(30, 168, 230, 0.2);
            color: var(--accent);
        }
        .topic-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        .topic-card p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.65;
            margin-bottom: 10px;
        }
        .topic-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            margin-top: 12px;
        }
        .topic-tags span {
            font-size: 0.72rem;
            font-weight: 600;
            color: var(--accent);
            background: rgba(45, 227, 192, 0.08);
            border: 1px solid rgba(45, 227, 192, 0.15);
            border-radius: var(--radius-badge);
            padding: 3px 10px;
        }

        /* ===== Security Banner ===== */
        .security-banner {
            display: flex;
            align-items: center;
            gap: 18px;
            background: rgba(244, 63, 94, 0.04);
            border: 1px solid rgba(244, 63, 94, 0.25);
            border-radius: var(--radius-card);
            padding: 24px 28px;
            margin-top: 40px;
        }
        .security-icon {
            width: 40px;
            height: 40px;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 12px;
            background: rgba(244, 63, 94, 0.1);
            color: var(--warn);
        }
        .security-banner .text {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-wrap {
            max-width: 840px;
            margin: 0 auto;
        }
        .faq-item {
            border: 1px solid rgba(148, 163, 184, 0.14);
            background: rgba(15, 23, 42, 0.45);
            border-radius: var(--radius-card);
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color .25s ease;
        }
        .faq-item.open {
            border-color: rgba(30, 168, 230, 0.35);
            box-shadow: 0 0 0 1px rgba(30, 168, 230, 0.15);
        }
        .faq-q {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            text-align: left;
            font-size: 0.98rem;
            font-weight: 600;
            color: var(--text-primary);
        }
        .faq-q:hover {
            color: var(--primary);
        }
        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: rgba(30, 168, 230, 0.1);
            color: var(--primary);
            transition: transform .3s;
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
        }
        .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height .32s ease, padding .32s ease;
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.7;
            padding: 0 24px;
        }
        .faq-item.open .faq-a {
            max-height: 200px;
            padding: 0 24px 20px;
        }
        .faq-note {
            text-align: center;
            margin-top: 24px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .faq-note a {
            color: var(--primary);
            font-weight: 600;
        }
        .faq-note a:hover {
            text-decoration: underline;
        }

        /* ===== CTA ===== */
        .cta-section {
            position: relative;
            overflow: hidden;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-position: center;
            background-size: cover;
            padding: 96px 0;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(7, 11, 20, 0.78);
            z-index: 0;
        }
        .cta-box {
            position: relative;
            z-index: 1;
            text-align: center;
            background: rgba(15, 23, 42, 0.5);
            backdrop-filter: blur(20px) saturate(150%);
            -webkit-backdrop-filter: blur(20px) saturate(150%);
            border: 1px solid rgba(148, 163, 184, 0.16);
            border-radius: 20px;
            padding: 64px 40px;
            max-width: 820px;
            margin: 0 auto;
        }
        .cta-box h2 {
            font-size: clamp(1.5rem, 2.5vw, 2rem);
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
        }
        .cta-box p {
            color: var(--text-secondary);
            font-size: 1rem;
            margin-bottom: 32px;
            max-width: 520px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }
        .cta-safe {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            margin-top: 24px;
            font-size: 0.82rem;
            color: rgba(148, 163, 184, 0.6);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #05080F;
            padding: 64px 0 0;
            border-top: 1px solid rgba(148, 163, 184, 0.08);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 48px;
        }
        .footer-brand p {
            color: var(--text-muted);
            font-size: 0.88rem;
            line-height: 1.7;
            margin-top: 16px;
            max-width: 320px;
        }
        .footer-col h4 {
            color: var(--text-primary);
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col a {
            color: var(--text-muted);
            font-size: 0.88rem;
            transition: color .2s;
        }
        .footer-col a:hover {
            color: var(--primary);
        }
        .footer-security {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 12px;
            padding: 20px 0;
            border-top: 1px solid rgba(148, 163, 184, 0.08);
            border-bottom: 1px solid rgba(148, 163, 184, 0.08);
            margin-bottom: 20px;
        }
        .security-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.8rem;
            color: var(--text-secondary);
            background: rgba(15, 23, 42, 0.6);
            border: 1px solid rgba(148, 163, 184, 0.12);
            border-radius: var(--radius-badge);
            padding: 8px 16px;
        }
        .security-badge.dark {
            background: rgba(30, 168, 230, 0.06);
            border-color: rgba(30, 168, 230, 0.15);
            color: var(--primary);
        }
        .footer-copyright {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            padding: 20px 0 28px;
            color: var(--text-muted);
            font-size: 0.82rem;
        }
        .footer-icp {
            color: var(--text-muted);
        }

        /* ===== Reveal Animation ===== */
        .reveal {
            opacity: 0;
            transform: translateY(20px);
            transition: opacity .55s ease, transform .55s ease;
        }
        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }
        @media (prefers-reduced-motion: reduce) {
            .reveal {
                opacity: 1;
                transform: none;
            }
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .section {
                padding: 72px 0;
            }
            .stat-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .features-grid {
                grid-template-columns: 1fr 1fr;
                gap: 18px;
            }
            .topic-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .steps-wrap {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .steps-wrap::before {
                display: none;
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: 60px 0;
            }
            .cat-hero {
                min-height: 70vh;
                padding: 80px 0 56px;
            }
            .cat-hero h1 {
                font-size: 1.9rem;
            }
            .cat-hero .hero-sub {
                font-size: 1.1rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .scenario-wrap {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .topic-grid {
                grid-template-columns: 1fr;
            }
            .stat-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .stat-num {
                font-size: 1.9rem;
            }
            .steps-wrap {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .step-box {
                text-align: left;
                display: flex;
                align-items: flex-start;
                gap: 16px;
            }
            .step-dot {
                margin: 0;
                flex-shrink: 0;
            }
            .cta-box {
                padding: 48px 24px;
            }
            .cta-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .security-banner {
                flex-direction: column;
                align-items: flex-start;
            }
            .footer-security {
                flex-direction: column;
                align-items: flex-start;
            }
            .scenario-box {
                padding: 28px 20px;
            }
            .topic-card {
                padding: 24px 20px;
                flex-direction: column;
                gap: 16px;
            }
            .search-form {
                width: 100%;
            }
        }

        @media (max-width: 520px) {
            .header-actions .header-login {
                display: none;
            }
            .nav-tabs a {
                padding: 0 14px;
                min-height: 34px;
                font-size: 0.85rem;
            }
            .footer-security {
                gap: 8px;
            }
            .security-badge {
                width: 100%;
                font-size: 0.78rem;
            }
            .logo-text {
                font-size: 0.95rem;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
            }
        }

/* roulang page: category3 */
:root{
    --bg-base:#070B14;
    --bg-deep:#0B1220;
    --primary:#1EA8E6;
    --primary-glow:rgba(30,168,230,.45);
    --accent:#2DE3C0;
    --cta:#F59E0B;
    --cta-deep:#D97706;
    --warn:#F43F5E;
    --text-primary:#F1F5F9;
    --text-secondary:rgba(226,232,240,.72);
    --text-muted:rgba(148,163,184,.6);
    --radius-sm:10px;
    --radius-md:16px;
    --radius-lg:20px;
    --shadow-card:0 12px 40px rgba(2,6,23,.45);
    --shadow-hover:0 20px 60px rgba(30,168,230,.18);
    --font-cn:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  }
  *{box-sizing:border-box;margin:0;padding:0}
  html{scroll-behavior:smooth;scroll-padding-top:120px}
  body{
    font-family:var(--font-cn);
    background:var(--bg-base);
    color:var(--text-primary);
    line-height:1.75;
    overflow-x:hidden;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block}
  a{color:inherit;text-decoration:none;transition:color .2s ease, border-color .2s ease, box-shadow .2s ease}
  a:focus-visible,button:focus-visible,input:focus-visible{
    outline:2px solid var(--primary);
    outline-offset:2px;
    border-radius:4px;
  }
  .container{max-width:1200px;margin:0 auto;padding:0 24px}
  @media(max-width:640px){.container{padding:0 16px}}

  /* Header */
  .site-header{
    position:sticky;top:0;z-index:100;
    background:rgba(7,11,20,.85);
    backdrop-filter:blur(16px) saturate(150%);
    -webkit-backdrop-filter:blur(16px) saturate(150%);
    border-bottom:1px solid rgba(148,163,184,.12);
    transition:box-shadow .3s ease;
  }
  .site-header.scrolled{box-shadow:0 8px 30px rgba(2,6,23,.5)}
  .header-top{border-bottom:1px solid rgba(148,163,184,.08)}
  .logo{display:inline-flex;align-items:center;gap:10px;font-size:1.05rem;letter-spacing:.01em;white-space:nowrap}
  .logo-icon{
    width:34px;height:34px;border-radius:10px;
    display:flex;align-items:center;justify-content:center;
    background:linear-gradient(135deg,rgba(30,168,230,.18),rgba(45,227,192,.1));
    border:1px solid rgba(30,168,230,.3);
    color:var(--primary);
    flex-shrink:0;
  }
  .logo-text{color:var(--text-primary);font-weight:500}
  .logo-text strong{color:var(--primary);font-weight:800;background:linear-gradient(90deg,#1EA8E6,#2DE3C0);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
  .header-search{width:320px}
  .search-form{
    display:flex;align-items:center;
    background:rgba(15,23,42,.6);
    border:1px solid rgba(148,163,184,.16);
    border-radius:999px;
    padding:4px 6px 4px 16px;
    transition:border-color .2s ease,box-shadow .2s ease;
  }
  .search-form:focus-within{border-color:var(--primary);box-shadow:0 0 0 1px var(--primary-glow)}
  .search-form input{
    flex:1;background:transparent;border:none;outline:none;
    color:var(--text-primary);font-size:.85rem;min-width:0;
  }
  .search-form input::placeholder{color:var(--text-muted)}
  .search-form button{
    width:30px;height:30px;border-radius:50%;
    background:rgba(30,168,230,.15);border:none;
    color:var(--primary);display:flex;align-items:center;justify-content:center;
    cursor:pointer;transition:background .2s ease;
  }
  .search-form button:hover{background:rgba(30,168,230,.3)}
  .header-actions{display:flex;align-items:center;gap:14px}
  .header-login{font-size:.85rem;color:var(--text-secondary);padding:6px 0;border-bottom:1px solid transparent}
  .header-login:hover{color:var(--primary);border-color:var(--primary)}
  .header-nav{position:relative}
  .nav-tabs-wrap{position:relative;display:flex;align-items:center}
  .nav-tabs{
    display:flex;align-items:center;gap:6px;
    list-style:none;overflow-x:auto;scrollbar-width:none;
    padding:10px 0;
    -webkit-overflow-scrolling:touch;
  }
  .nav-tabs::-webkit-scrollbar{display:none}
  .nav-tabs li{flex-shrink:0}
  .nav-tabs a{
    display:inline-flex;align-items:center;gap:6px;
    padding:8px 18px;border-radius:999px;
    font-size:.88rem;font-weight:500;color:var(--text-secondary);
    background:rgba(148,163,184,.08);
    border:1px solid transparent;
    white-space:nowrap;
    transition:all .2s ease;
  }
  .nav-tabs a:hover{color:var(--text-primary);background:rgba(30,168,230,.12);border-color:rgba(30,168,230,.25)}
  .nav-tabs a.active{
    color:var(--text-primary);
    background:rgba(30,168,230,.18);
    border-color:var(--primary);
    box-shadow:0 0 16px rgba(30,168,230,.2);
  }
  .nav-fade{position:absolute;top:0;bottom:0;width:40px;pointer-events:none;z-index:2}
  .nav-fade-left{left:0;background:linear-gradient(90deg,rgba(7,11,20,.9),transparent)}
  .nav-fade-right{right:0;background:linear-gradient(-90deg,rgba(7,11,20,.9),transparent)}

  /* Buttons */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    min-height:48px;padding:0 28px;border-radius:10px;
    font-size:.92rem;font-weight:700;line-height:1;
    border:none;cursor:pointer;transition:all .25s ease;
    text-align:center;
  }
  .btn-sm{min-height:40px;padding:0 20px;font-size:.85rem}
  .btn-cta{
    background:linear-gradient(135deg,var(--cta),var(--cta-deep));
    color:#1F1F1F;font-weight:800;
    box-shadow:0 0 20px rgba(245,158,11,.3);
  }
  .btn-cta:hover{
    filter:brightness(1.08);
    box-shadow:0 0 32px rgba(245,158,11,.5);
    transform:translateY(-1px);
  }
  .btn-cta:active{transform:translateY(1px);box-shadow:0 0 12px rgba(245,158,11,.3)}
  .btn-outline{
    background:rgba(15,23,42,.45);
    border:1px solid var(--primary);
    color:var(--primary);
    backdrop-filter:blur(8px);
  }
  .btn-outline:hover{background:rgba(30,168,230,.1);box-shadow:0 0 20px rgba(30,168,230,.15);transform:translateY(-1px)}
  .btn-outline:active{transform:translateY(0)}
  .btn-dark{
    background:rgba(148,163,184,.12);
    color:var(--text-primary);
  }
  .btn-dark:hover{background:rgba(148,163,184,.2)}

  /* Hero */
  .category-hero{
    position:relative;
    padding:88px 0 72px;
    background:url('/assets/images/backpic/back-1.png') center/cover no-repeat;
    overflow:hidden;
  }
  .category-hero::before{
    content:"";
    position:absolute;inset:0;
    background:linear-gradient(180deg,rgba(7,11,20,.72),rgba(7,11,20,.9) 80%);
    z-index:1;
  }
  .category-hero::after{
    content:"";
    position:absolute;top:0;right:0;left:0;height:1px;
    background:linear-gradient(90deg,transparent,rgba(30,168,230,.4),transparent);
  }
  .category-hero .hero-inner{position:relative;z-index:2;text-align:center}
  .hero-badge{
    display:inline-flex;align-items:center;gap:8px;
    padding:6px 16px;border-radius:999px;
    background:rgba(30,168,230,.12);
    border:1px solid rgba(30,168,230,.3);
    color:var(--primary);font-size:.78rem;font-weight:600;
    margin-bottom:20px;
  }
  .category-hero h1{
    font-size:clamp(1.8rem,3.6vw,2.6rem);
    font-weight:800;line-height:1.2;letter-spacing:.02em;
    margin-bottom:16px;color:var(--text-primary);
  }
  .category-hero h1 span{background:linear-gradient(90deg,#1EA8E6,#2DE3C0);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
  .hero-desc{
    font-size:1rem;color:var(--text-secondary);
    max-width:600px;margin:0 auto 32px;
  }
  .hero-actions{display:flex;justify-content:center;gap:16px;flex-wrap:wrap}
  .hero-safety{
    display:flex;justify-content:center;gap:12px;flex-wrap:wrap;
    margin-top:36px;
  }
  .hero-safety span{
    display:inline-flex;align-items:center;gap:6px;
    font-size:.76rem;color:var(--text-muted);
    padding:5px 14px;border-radius:999px;
    background:rgba(15,23,42,.5);
    border:1px solid rgba(148,163,184,.12);
  }
  .hero-safety svg{width:13px;height:13px;color:var(--accent)}

  /* Sub tabs */
  .sub-tabs{
    background:var(--bg-deep);
    border-bottom:1px solid rgba(30,168,230,.12);
    padding:16px 0;
  }
  .sub-tabs .container{
    display:flex;align-items:center;gap:10px;overflow-x:auto;scrollbar-width:none;
    -webkit-overflow-scrolling:touch;
  }
  .sub-tabs .container::-webkit-scrollbar{display:none}
  .sub-tab{
    padding:7px 18px;border-radius:999px;
    font-size:.82rem;font-weight:600;color:var(--text-secondary);
    background:rgba(148,163,184,.08);
    border:1px solid transparent;
    white-space:nowrap;
    transition:all .2s ease;
  }
  .sub-tab:hover{color:var(--text-primary);border-color:rgba(30,168,230,.3)}
  .sub-tab.active{
    color:var(--text-primary);background:rgba(30,168,230,.16);
    border-color:var(--primary);
  }

  /* Content area */
  .category-main{padding:56px 0 72px;background:var(--bg-base)}
  .content-grid{display:grid;grid-template-columns:1fr 360px;gap:40px;align-items:start}
  @media(max-width:1023px){.content-grid{grid-template-columns:1fr}}

  /* Article list cards */
  .post-list{display:flex;flex-direction:column;gap:24px}
  .post-card{
    display:grid;grid-template-columns:280px 1fr;gap:0;
    background:rgba(15,23,42,.55);
    border:1px solid rgba(148,163,184,.14);
    border-radius:var(--radius-md);
    overflow:hidden;
    backdrop-filter:blur(16px) saturate(150%);
    transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
  }
  .post-card:hover{
    transform:translateY(-4px);
    box-shadow:var(--shadow-hover);
    border-color:rgba(148,163,184,.28);
  }
  .post-cover{position:relative;min-height:180px;overflow:hidden;background:var(--bg-deep)}
  .post-cover img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0;transition:transform .4s ease}
  .post-card:hover .post-cover img{transform:scale(1.04)}
  .post-cover .badge{
    position:absolute;top:12px;left:12px;z-index:2;
    padding:4px 10px;border-radius:999px;
    background:rgba(30,168,230,.85);
    color:#071C2C;font-size:.72rem;font-weight:700;
    backdrop-filter:blur(4px);
  }
  .post-body{padding:24px 24px 20px;display:flex;flex-direction:column;gap:10px}
  .post-body h3{
    font-size:1.12rem;font-weight:700;line-height:1.4;color:var(--text-primary);
    display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;
    transition:color .2s ease;
  }
  .post-card:hover .post-body h3{color:var(--primary)}
  .post-excerpt{
    font-size:.88rem;color:var(--text-secondary);line-height:1.7;
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  }
  .post-meta{
    display:flex;align-items:center;gap:16px;
    font-size:.78rem;color:var(--text-muted);
    margin-top:auto;padding-top:4px;
  }
  .post-meta svg{width:13px;height:13px}
  .post-meta .read-more{
    margin-left:auto;display:inline-flex;align-items:center;gap:4px;
    color:var(--primary);font-weight:600;font-size:.8rem;
  }
  .post-meta .read-more:hover{text-decoration:underline}
  @media(max-width:640px){
    .post-card{grid-template-columns:1fr}
    .post-cover{min-height:190px;aspect-ratio:16/9;position:relative}
    .post-cover img{position:absolute}
  }

  /* Sidebar */
  .sidebar{display:flex;flex-direction:column;gap:24px;position:sticky;top:130px}
  @media(max-width:1023px){.sidebar{position:static}}
  .side-card{
    background:rgba(15,23,42,.55);
    border:1px solid rgba(148,163,184,.14);
    border-radius:var(--radius-md);
    padding:24px;
    backdrop-filter:blur(16px) saturate(150%);
  }
  .side-card h3{
    font-size:1rem;font-weight:700;color:var(--text-primary);
    margin-bottom:16px;padding-bottom:12px;
    border-bottom:1px solid rgba(148,163,184,.1);
    position:relative;
  }
  .side-card h3::after{
    content:"";position:absolute;left:0;bottom:-1px;width:32px;height:2px;
    background:linear-gradient(90deg,var(--primary),transparent);
  }
  .hot-list{list-style:none;display:flex;flex-direction:column;gap:12px}
  .hot-list li{
    display:flex;gap:12px;align-items:center;
    padding-bottom:10px;border-bottom:1px solid rgba(148,163,184,.06);
  }
  .hot-list li:last-child{border-bottom:none;padding-bottom:0}
  .hot-num{
    width:26px;height:26px;border-radius:8px;
    display:flex;align-items:center;justify-content:center;
    background:rgba(30,168,230,.12);
    color:var(--primary);font-size:.75rem;font-weight:800;flex-shrink:0;
  }
  .hot-list li:first-child .hot-num{background:rgba(245,158,11,.15);color:var(--cta)}
  .hot-list li:nth-child(2) .hot-num{background:rgba(45,227,192,.12);color:var(--accent)}
  .hot-list a{
    font-size:.84rem;color:var(--text-secondary);line-height:1.5;
    display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;
  }
  .hot-list a:hover{color:var(--primary)}
  .side-warn{
    border:1px solid rgba(244,63,94,.3);
    background:rgba(244,63,94,.05);
  }
  .side-warn h3{color:#FECDD3;border-color:rgba(244,63,94,.2)}
  .side-warn h3::after{background:linear-gradient(90deg,var(--warn),transparent)}
  .warn-text{font-size:.8rem;color:var(--text-secondary);line-height:1.7;margin-bottom:14px}
  .warn-text strong{color:#FDA4AF}
  .side-warn .btn{width:100%}
  .side-cta{
    background:linear-gradient(135deg,rgba(30,168,230,.12),rgba(45,227,192,.06));
    border:1px solid rgba(30,168,230,.2);
    text-align:center;
  }
  .side-cta .icon-wrap{
    width:52px;height:52px;margin:0 auto 14px;border-radius:16px;
    background:rgba(30,168,230,.15);
    display:flex;align-items:center;justify-content:center;
    color:var(--primary);
  }
  .side-cta h3{font-size:1.05rem;margin-bottom:8px;padding-bottom:0;border:none}
  .side-cta h3::after{display:none}
  .side-cta p{font-size:.8rem;color:var(--text-secondary);margin-bottom:16px}
  .side-cta .btn{width:100%}

  /* CTA */
  .cta-section{
    position:relative;padding:72px 0;
    background:url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
    overflow:hidden;
  }
  .cta-section::before{
    content:"";position:absolute;inset:0;
    background:rgba(7,11,20,.78);
  }
  .cta-section::after{
    content:"";
    position:absolute;top:0;left:-10%;right:-10%;height:1px;
    background:linear-gradient(90deg,transparent,rgba(30,168,230,.5),transparent);
  }
  .cta-inner{
    position:relative;z-index:2;
    max-width:700px;margin:0 auto;text-align:center;
    background:rgba(15,23,42,.5);
    border:1px solid rgba(148,163,184,.16);
    border-radius:var(--radius-lg);
    padding:48px 40px;
    backdrop-filter:blur(16px);
  }
  .cta-inner h2{
    font-size:clamp(1.3rem,2.5vw,1.8rem);
    font-weight:800;color:var(--text-primary);margin-bottom:14px;
  }
  .cta-inner h2 span{color:var(--cta)}
  .cta-inner p{font-size:.9rem;color:var(--text-secondary);margin-bottom:28px}
  .cta-inner .btn{min-width:220px}
  .cta-safe-note{
    margin-top:18px;font-size:.74rem;color:var(--text-muted);
    display:flex;align-items:center;justify-content:center;gap:6px;
  }

  /* Footer */
  .site-footer{background:var(--bg-deep);border-top:1px solid rgba(148,163,184,.08);padding:56px 0 24px}
  .footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
  @media(max-width:1023px){.footer-grid{grid-template-columns:1fr 1fr;gap:32px}}
  @media(max-width:560px){.footer-grid{grid-template-columns:1fr}}
  .footer-brand p{font-size:.85rem;color:var(--text-muted);margin-top:14px;max-width:280px}
  .footer-col h4{
    font-size:.9rem;font-weight:700;color:var(--text-primary);
    margin-bottom:16px;letter-spacing:.02em;
  }
  .footer-col ul{list-style:none;display:flex;flex-direction:column;gap:10px}
  .footer-col a{font-size:.82rem;color:var(--text-muted);transition:color .2s ease}
  .footer-col a:hover{color:var(--primary)}
  .footer-security{
    display:flex;flex-wrap:wrap;gap:12px;align-items:center;
    padding:20px 0;border-top:1px solid rgba(148,163,184,.08);
    border-bottom:1px solid rgba(148,163,184,.08);
    margin-bottom:20px;
  }
  .security-badge{
    display:inline-flex;align-items:center;gap:7px;
    padding:6px 14px;border-radius:999px;
    font-size:.76rem;color:var(--accent);
    background:rgba(45,227,192,.08);
    border:1px solid rgba(45,227,192,.2);
  }
  .security-badge.dark{
    color:var(--text-secondary);
    background:rgba(148,163,184,.06);
    border-color:rgba(148,163,184,.12);
  }
  .footer-copyright{
    display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
    font-size:.76rem;color:var(--text-muted);
  }
  .footer-icp{color:var(--text-muted)}

  /* Reveal */
  .reveal{opacity:1}
  .reveal-visible{animation:fadeUp .6s ease forwards}
  @keyframes fadeUp{
    from{opacity:0;transform:translateY(16px)}
    to{opacity:1;transform:translateY(0)}
  }
  @media(prefers-reduced-motion:reduce){
    *{animation:none!important;transition:none!important}
    html{scroll-behavior:auto}
  }

  /* Hero diagonal light line */
  .light-sweep{position:relative}
  .light-sweep::before{
    content:"";
    position:absolute;top:0;left:-10%;width:120%;height:2px;
    background:linear-gradient(120deg,transparent,rgba(30,168,230,.25),transparent);
    z-index:2;
  }