/* roulang page: index */
:root {
  --bg-primary: #0A0E17;
  --bg-secondary: rgba(255,255,255,0.04);
  --primary: #4F7CFF;
  --secondary: #35E0D4;
  --accent: #D9B36C;
  --text-primary: #E9EDF5;
  --text-secondary: #8A93A6;
  --text-muted: #4A5568;
  --border: rgba(255,255,255,0.08);
  --border-strong: rgba(255,255,255,0.1);
  --glass-bg: linear-gradient(135deg, rgba(255,255,255,0.08), rgba(255,255,255,0.02));
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-card: 0 12px 40px rgba(0,0,0,0.3);
  --shadow-hover: 0 16px 48px rgba(79,124,255,0.15);
  --transition: all 0.3s ease;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
button { font-family: inherit; cursor: pointer; }
input { font-family: inherit; }
:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 4px; }
.grid-container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* header */
.site-header {
  position: fixed; top: 0; left: 0; width: 100%; z-index: 100;
  background: transparent; transition: background 0.4s ease, box-shadow 0.4s ease, border-color 0.4s ease;
  border-bottom: 1px solid transparent; height: 72px;
  display: flex; align-items: center;
}
.site-header.scrolled {
  background: rgba(10,14,23,0.85);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
}
.nav-container { display: flex; align-items: center; justify-content: space-between; width: 100%; }
.site-logo {
  font-size: 20px; font-weight: 600; letter-spacing: 0.5px; white-space: nowrap;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.main-nav { display: flex; align-items: center; gap: 36px; }
.nav-link {
  position: relative; font-size: 15px; font-weight: 400; color: var(--text-secondary);
  padding: 10px 0; letter-spacing: 0.2px; transition: color 0.3s ease;
}
.nav-link:hover { color: var(--text-primary); }
.nav-link.active { color: var(--text-primary); }
.nav-link.active::after {
  content: ""; position: absolute; left: 50%; bottom: 4px; transform: translateX(-50%);
  width: 24px; height: 4px; border-radius: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  box-shadow: 0 0 12px rgba(79,124,255,0.5);
}
.menu-toggle {
  display: none; background: none; border: 1px solid var(--border-strong);
  color: var(--text-primary); font-size: 14px; letter-spacing: 2px;
  padding: 8px 18px; border-radius: var(--radius-sm);
  transition: var(--transition); background: rgba(255,255,255,0.04);
}
.menu-toggle:hover { border-color: var(--primary); color: var(--primary); }

/* mobile menu */
.mobile-menu {
  position: fixed; inset: 0; z-index: 90; background: rgba(10,14,23,0.96);
  backdrop-filter: blur(24px); -webkit-backdrop-filter: blur(24px);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; visibility: hidden; transition: opacity 0.4s ease, visibility 0.4s ease;
}
.mobile-menu.open { opacity: 1; visibility: visible; }
.mobile-menu-inner { display: flex; flex-direction: column; align-items: center; gap: 28px; }
.mobile-link {
  font-size: 24px; font-weight: 300; color: var(--text-secondary); letter-spacing: 4px;
  transition: color 0.3s ease;
}
.mobile-link:hover, .mobile-link.active { color: var(--text-primary); }
body.menu-open { overflow: hidden; }

/* hero */
.hero {
  position: relative; min-height: 100vh; display: flex; align-items: center;
  background-image: linear-gradient(to bottom, rgba(10,14,23,0.4) 0%, rgba(10,14,23,0.85) 100%), url('/assets/images/backpic/back-1.png');
  background-size: cover; background-position: center;
  padding-top: 72px;
}
.hero-overlay { position: absolute; inset: 0; background: rgba(10,14,23,0.25); pointer-events: none; }
.hero-content { position: relative; z-index: 2; max-width: 780px; padding: 60px 24px; }
.hero-badge {
  display: inline-block; font-size: 13px; color: var(--accent); letter-spacing: 3px;
  border: 1px solid rgba(217,179,108,0.4); border-radius: 6px;
  padding: 4px 14px; background: rgba(217,179,108,0.08); margin-bottom: 24px;
}
.hero-title {
  font-size: 38px; font-weight: 600; letter-spacing: 0.5px; line-height: 1.35; margin-bottom: 20px;
}
.hero-title .grad {
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.hero-subtitle {
  font-size: 16px; font-weight: 300; color: var(--text-secondary);
  line-height: 1.8; margin-bottom: 40px; max-width: 560px;
}
.hero-cta { display: flex; align-items: center; gap: 32px; flex-wrap: wrap; }
.btn-primary {
  display: inline-block; padding: 16px 40px; border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff; font-size: 16px; font-weight: 500; letter-spacing: 1px;
  box-shadow: 0 0 24px rgba(79,124,255,0.4); transition: all 0.3s ease; border: none;
}
.btn-primary:hover { box-shadow: 0 0 36px rgba(79,124,255,0.6); transform: translateY(-2px); color: #fff; }
.btn-primary:active { transform: translateY(0); }
.btn-text {
  font-size: 15px; color: var(--text-primary); padding-bottom: 4px;
  border-bottom: 2px solid transparent; transition: all 0.3s ease;
}
.btn-text:hover { color: var(--primary); border-bottom: 2px solid var(--primary); }
.scroll-indicator {
  position: absolute; bottom: 40px; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 10px; z-index: 3;
}
.scroll-line { width: 1px; height: 40px; background: rgba(255,255,255,0.3); position: relative; overflow: hidden; }
.scroll-line::after {
  content: ""; position: absolute; top: -100%; left: 0; width: 100%; height: 100%;
  background: var(--primary); animation: scrollPulse 2s ease infinite;
}
@keyframes scrollPulse { 0% { top: -100%; } 100% { top: 100%; } }
.scroll-text { font-size: 12px; color: var(--text-muted); letter-spacing: 2px; }

/* section common */
.section-head { text-align: center; margin-bottom: 56px; }
.section-tag {
  display: inline-block; font-size: 13px; color: var(--secondary); letter-spacing: 3px;
  border: 1px solid rgba(53,224,212,0.3); border-radius: 6px;
  padding: 4px 14px; background: rgba(53,224,212,0.05); margin-bottom: 16px;
}
.section-head h2, .section-head h3 {
  font-size: 28px; font-weight: 500; letter-spacing: 0.3px; line-height: 1.4;
  margin-bottom: 12px;
}
.section-sub { font-size: 15px; color: var(--text-secondary); max-width: 600px; margin: 0 auto; }

/* about section */
.about-section { padding: 100px 0 80px; position: relative; }
.about-section::before {
  content: ""; position: absolute; top: 0; left: 50%; transform: translateX(-50%);
  width: 80%; height: 1px; background: linear-gradient(90deg, transparent, var(--border-strong), transparent);
}
.about-grid { display: grid; grid-template-columns: 5fr 7fr; gap: 60px; align-items: center; }
.about-text .section-tag { margin-bottom: 12px; }
.about-text h2 { font-size: 28px; font-weight: 500; margin-bottom: 20px; line-height: 1.4; }
.about-text p { color: var(--text-secondary); font-size: 15px; line-height: 1.9; }
.about-cards { display: flex; flex-direction: column; gap: 24px; }
.mini-card {
  display: flex; gap: 24px; background: var(--glass-bg); border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  padding: 20px; box-shadow: var(--shadow-card); transition: var(--transition); align-items: center;
}
.mini-card:hover { border-color: rgba(79,124,255,0.5); box-shadow: var(--shadow-hover); transform: translateY(-3px); }
.mini-card-img { width: 96px; height: 96px; border-radius: var(--radius-md); overflow: hidden; flex-shrink: 0; }
.mini-card-img img { width: 100%; height: 100%; object-fit: cover; }
.mini-card-text h4 { font-size: 17px; font-weight: 500; margin-bottom: 8px; color: var(--text-primary); }
.mini-card-text p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

/* news section */
.news-section { padding: 90px 0; background: rgba(255,255,255,0.02); position: relative; }
.news-section::before {
  content: ""; position: absolute; inset: 0; opacity: 0.03;
  background-image: linear-gradient(rgba(255,255,255,0.3) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.3) 1px, transparent 1px);
  background-size: 48px 48px; pointer-events: none;
}
.news-section .grid-container { position: relative; }
.news-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.news-card {
  display: flex; flex-direction: column; background: var(--glass-bg);
  border: 1px solid var(--border-strong); border-radius: var(--radius-lg);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  overflow: hidden; box-shadow: var(--shadow-card); transition: var(--transition);
}
.news-card:hover { border-color: rgba(79,124,255,0.5); box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.news-card:hover .card-arrow { transform: translateX(4px); color: var(--secondary); }
.card-cover { position: relative; overflow: hidden; aspect-ratio: 16/9; background: #1A2233; }
.card-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.news-card:hover .card-cover img { transform: scale(1.04); }
.card-tag {
  position: absolute; top: 14px; left: 14px; font-size: 12px; color: var(--secondary);
  background: rgba(10,14,23,0.6); border: 1px solid rgba(53,224,212,0.3);
  border-radius: 6px; padding: 3px 10px; backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
}
.card-body { padding: 22px; display: flex; flex-direction: column; flex: 1; }
.card-body h3 {
  font-size: 18px; font-weight: 500; line-height: 1.5; color: var(--text-primary);
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
  margin-bottom: 12px;
}
.card-excerpt {
  font-size: 14px; color: var(--text-secondary); line-height: 1.7;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
  flex: 1; margin-bottom: 18px;
}
.card-meta { display: flex; align-items: center; justify-content: space-between; padding-top: 14px; border-top: 1px solid var(--border); }
.card-time { font-size: 13px; color: var(--text-muted); }
.card-arrow { font-size: 20px; color: var(--text-secondary); transition: all 0.3s ease; }
.news-card-wide { grid-column: span 2; flex-direction: row; }
.news-card-wide .card-cover { width: 40%; aspect-ratio: auto; min-height: 200px; }
.news-card-wide .card-body { width: 60%; }
.empty-state {
  grid-column: 1 / -1; text-align: center; padding: 80px 20px; color: var(--text-muted);
  border: 1px dashed var(--border-strong); border-radius: var(--radius-lg);
  background: rgba(255,255,255,0.02);
}
.empty-icon { font-size: 40px; display: block; margin-bottom: 16px; color: var(--text-muted); }
.empty-state p { font-size: 15px; }

/* trust section */
.trust-section { padding: 90px 0; }
.stats-row { display: flex; justify-content: center; gap: 0; margin-bottom: 60px; }
.stat-item {
  text-align: center; flex: 1; padding: 20px 0; border-right: 1px solid var(--border); position: relative;
}
.stat-item:last-child { border-right: none; }
.stat-num {
  display: block; font-size: 34px; font-weight: 700; color: var(--primary);
  text-shadow: 0 0 24px rgba(79,124,255,0.3); margin-bottom: 6px; line-height: 1.2;
}
.stat-item:nth-child(2) .stat-num { color: var(--secondary); text-shadow: 0 0 24px rgba(53,224,212,0.3); }
.stat-item:nth-child(3) .stat-num { color: var(--accent); text-shadow: 0 0 24px rgba(217,179,108,0.3); }
.stat-label { font-size: 14px; color: var(--text-secondary); letter-spacing: 0.5px; }
.testimonials-row { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; max-width: 900px; margin: 0 auto; }
.testimonial-card {
  background: var(--glass-bg); border: 1px solid var(--border-strong); border-radius: var(--radius-lg);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  padding: 28px 28px; transition: var(--transition);
}
.testimonial-card:hover { border-color: rgba(79,124,255,0.3); box-shadow: var(--shadow-hover); }
.testimonial-card p {
  font-size: 14px; line-height: 1.8; color: var(--text-primary); margin-bottom: 12px;
  position: relative; padding-left: 20px;
}
.testimonial-card p::before { content: "“"; position: absolute; left: 0; top: -4px; font-size: 24px; color: var(--primary); }
.testimonial-source { font-size: 13px; color: var(--text-muted); }

/* faq */
.faq-section { padding: 90px 0; background: rgba(255,255,255,0.02); }
.faq-list { max-width: 820px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid var(--border); }
.faq-item:first-child { border-top: 1px solid var(--border); }
.faq-question {
  width: 100%; background: none; border: none; display: flex; justify-content: space-between;
  align-items: center; padding: 24px 8px; font-size: 17px; font-weight: 500;
  color: var(--text-primary); text-align: left; transition: color 0.3s ease;
}
.faq-question:hover { color: var(--primary); }
.faq-toggle { font-size: 22px; color: var(--secondary); transition: transform 0.3s ease; }
.faq-answer {
  max-height: 0; overflow: hidden; transition: max-height 0.4s ease; padding: 0 8px;
}
.faq-item.active .faq-answer { max-height: 300px; }
.faq-answer p {
  font-size: 15px; color: var(--text-secondary); line-height: 1.7; padding: 0 0 20px;
}

/* cta */
.cta-section { padding: 100px 0; }
.cta-card {
  position: relative; border-radius: var(--radius-lg); overflow: hidden;
  background: linear-gradient(135deg, rgba(79,124,255,0.18), rgba(53,224,212,0.08)), var(--glass-bg);
  border: 1px solid var(--border-strong); backdrop-filter: blur(24px); -webkit-backdrop-filter: blur(24px);
  padding: 64px 48px; text-align: center; box-shadow: 0 24px 64px rgba(0,0,0,0.4);
}
.cta-card::before {
  content: ""; position: absolute; top: -120px; right: -120px; width: 280px; height: 280px;
  border-radius: 50%; background: rgba(79,124,255,0.12); filter: blur(40px); pointer-events: none;
}
.cta-card::after {
  content: ""; position: absolute; bottom: -80px; left: -80px; width: 200px; height: 200px;
  border-radius: 50%; background: rgba(53,224,212,0.1); filter: blur(36px); pointer-events: none;
}
.cta-card h2 { font-size: 32px; font-weight: 600; margin-bottom: 12px; letter-spacing: 0.5px; }
.cta-card > p { color: var(--text-secondary); font-size: 15px; margin-bottom: 32px; max-width: 480px; margin-left: auto; margin-right: auto; }
.cta-form {
  display: flex; gap: 12px; max-width: 520px; margin: 0 auto 36px; flex-wrap: wrap; justify-content: center;
}
.cta-form input {
  flex: 1; min-width: 220px; padding: 14px 18px; border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.2); background: rgba(255,255,255,0.04);
  color: var(--text-primary); font-size: 15px; transition: border-color 0.3s ease;
}
.cta-form input::placeholder { color: #5B6478; }
.cta-form input:focus { border-color: var(--primary); outline: none; }
.cta-form button {
  padding: 14px 28px; border-radius: var(--radius-sm); border: none;
  background: linear-gradient(135deg, var(--primary), var(--secondary)); color: #fff;
  font-size: 15px; font-weight: 500; box-shadow: 0 0 20px rgba(79,124,255,0.3);
  transition: all 0.3s ease;
}
.cta-form button:hover { box-shadow: 0 0 32px rgba(79,124,255,0.5); transform: translateY(-2px); }
.cta-btn-large {
  display: inline-block; padding: 18px 56px; border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--primary), var(--secondary)); color: #fff;
  font-size: 17px; font-weight: 500; letter-spacing: 2px;
  box-shadow: 0 0 28px rgba(79,124,255,0.45); transition: all 0.3s ease;
  position: relative; z-index: 2;
}
.cta-btn-large:hover { box-shadow: 0 0 40px rgba(79,124,255,0.55); transform: translateY(-3px); color: #fff; }
.cta-btn-large:active { transform: translateY(-1px); }

/* footer */
.site-footer { border-top: 1px solid var(--border); padding: 60px 0 24px; background: rgba(6,9,16,0.6); }
.footer-grid { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 48px; padding-bottom: 40px; border-bottom: 1px solid var(--border); margin-bottom: 24px; }
.footer-logo { font-size: 20px; font-weight: 600; letter-spacing: 0.5px; background: linear-gradient(90deg, var(--primary), var(--secondary)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.footer-brand p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; margin-top: 12px; max-width: 260px; }
.footer-nav h4, .footer-contact h4 { font-size: 15px; font-weight: 500; margin-bottom: 16px; color: var(--text-primary); }
.footer-nav a, .footer-contact a { display: block; font-size: 14px; color: var(--text-secondary); padding: 6px 0; transition: color 0.3s ease; }
.footer-nav a:hover, .footer-contact a:hover { color: var(--primary); }
.footer-contact p { font-size: 14px; color: var(--text-secondary); padding: 6px 0; margin: 0; }
.footer-bottom { text-align: center; font-size: 12px; color: var(--text-muted); padding-top: 8px; }

/* responsive */
@media (max-width: 1024px) {
  .hero-title { font-size: 32px; }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 768px) {
  .main-nav { display: none; }
  .menu-toggle { display: inline-block; }
  .hero { min-height: 75vh; }
  .hero-content { max-width: 100%; padding: 40px 24px; }
  .hero-title { font-size: 28px; line-height: 1.4; }
  .hero-subtitle { font-size: 15px; }
  .section-head h2, .section-head h3 { font-size: 24px; }
  .about-section, .news-section, .trust-section, .faq-section, .cta-section { padding: 60px 0; }
  .news-grid { grid-template-columns: 1fr; gap: 18px; }
  .news-card-wide { grid-column: span 1; flex-direction: column; }
  .news-card-wide .card-cover { width: 100%; aspect-ratio: 16/9; min-height: auto; }
  .news-card-wide .card-body { width: 100%; }
  .stats-row { flex-direction: column; gap: 24px; }
  .stat-item { border-right: none; border-bottom: 1px solid var(--border); padding: 16px 0; }
  .stat-item:last-child { border-bottom: none; }
  .stat-num { font-size: 30px; }
  .testimonials-row { grid-template-columns: 1fr; gap: 16px; }
  .cta-card { padding: 40px 24px; }
  .cta-form { flex-direction: column; }
  .cta-form input { min-width: 100%; }
  .cta-form button { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; padding-bottom: 24px; }
  .cta-card h2 { font-size: 26px; }
}
@media (max-width: 520px) {
  .grid-container { padding: 0 16px; }
  .hero-badge { font-size: 12px; }
  .mini-card { flex-direction: column; align-items: flex-start; }
  .mini-card-img { width: 100%; height: 140px; }
  .section-sub { font-size: 14px; }
  .card-body { padding: 18px; }
  .cta-card { padding: 32px 20px; }
  .cta-btn-large { width: 100%; text-align: center; }
}

/* roulang page: article */
:root {
    --bg-primary: #0A0E17;
    --bg-secondary: rgba(255,255,255,0.04);
    --primary: #4F7CFF;
    --secondary: #35E0D4;
    --gold: #D9B36C;
    --text-main: #E9EDF5;
    --text-secondary: #8A93A6;
    --text-placeholder: #4A5568;
    --border-color: rgba(255,255,255,0.08);
    --border-light: rgba(255,255,255,0.1);
    --radius-lg: 16px;
    --radius-md: 12px;
    --radius-sm: 8px;
    --radius-tag: 6px;
    --shadow-card: 0 12px 40px rgba(0,0,0,0.3);
    --shadow-hover: 0 16px 48px rgba(79,124,255,0.15);
    --shadow-glow: 0 0 24px rgba(79,124,255,0.4);
    --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    --font-mono: "JetBrains Mono", "Fira Code", Consolas, monospace;
    --container-max: 1200px;
    --content-max: 720px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font-main);
    background: var(--bg-primary);
    color: var(--text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: color .3s ease, opacity .3s ease; }
button { border: none; background: none; cursor: pointer; font-family: inherit; }
input, textarea { font-family: inherit; }
ul, ol { list-style: none; }
::selection { background: rgba(79,124,255,0.3); color: #fff; }
.grid-container { max-width: var(--container-max); margin: 0 auto; padding: 0 24px; }

/* ===== Header / Nav ===== */
.site-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    height: 72px;
    background: transparent;
    transition: background .35s ease, backdrop-filter .35s ease, border-color .35s ease;
    border-bottom: 1px solid transparent;
}
.site-header.scrolled {
    background: rgba(10,14,23,0.85);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(255,255,255,0.06);
}
.site-header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}
.site-logo {
    font-size: 20px;
    font-weight: 600;
    letter-spacing: .6px;
    color: var(--text-main);
    background: linear-gradient(90deg, #fff, rgba(255,255,255,.75));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    white-space: nowrap;
}
.main-nav {
    display: flex;
    align-items: center;
    gap: 36px;
}
.nav-link {
    font-size: 14px;
    color: var(--text-secondary);
    position: relative;
    padding: 10px 0;
    letter-spacing: .3px;
    transition: color .3s ease;
    white-space: nowrap;
}
.nav-link:hover { color: var(--text-main); }
.nav-link.active { color: var(--text-main); }
.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 4px;
    border-radius: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    box-shadow: 0 0 12px rgba(79,124,255,0.5);
}
.mobile-menu-toggle {
    display: none;
    font-size: 14px;
    color: var(--text-main);
    padding: 8px 18px;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-sm);
    letter-spacing: 3px;
    background: rgba(255,255,255,0.04);
    transition: background .3s ease;
}
.mobile-menu-toggle:hover { background: rgba(255,255,255,0.08); }

/* ===== Article Hero ===== */
.article-hero {
    position: relative;
    min-height: 240px;
    background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
    display: flex;
    align-items: flex-end;
    padding-top: 120px;
}
.article-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(10,14,23,.4) 0%, rgba(10,14,23,.88) 100%);
    z-index: 1;
}
.breadcrumb {
    position: relative;
    z-index: 2;
    padding: 24px 0 28px;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 13px;
    color: var(--text-secondary);
}
.breadcrumb a { color: var(--text-secondary); transition: color .3s ease; }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb-sep { color: var(--text-placeholder); opacity: .6; }
.breadcrumb .current { color: var(--text-main); max-width: 300px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* ===== Article Main ===== */
.article-main {
    padding: 50px 0 80px;
}
.article-container {
    max-width: var(--content-max);
    margin: 0 auto;
    position: relative;
}
.article-title {
    font-size: 36px;
    font-weight: 500;
    line-height: 1.35;
    letter-spacing: .5px;
    color: var(--text-main);
    margin-bottom: 20px;
}
.article-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    font-size: 13px;
    color: var(--text-secondary);
    padding-bottom: 28px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 36px;
}
.article-meta .meta-category {
    display: inline-flex;
    align-items: center;
    padding: 3px 12px;
    background: rgba(79,124,255,.12);
    border: 1px solid rgba(79,124,255,.25);
    border-radius: var(--radius-tag);
    color: var(--primary);
    font-size: 12px;
    letter-spacing: .4px;
}
.article-meta .meta-divider {
    width: 1px;
    height: 12px;
    background: var(--border-color);
}
.article-body {
    font-size: 17px;
    line-height: 1.9;
    color: #CBD2E0;
}
.article-body p { margin-bottom: 28px; }
.article-body h1, .article-body h2, .article-body h3, .article-body h4 {
    color: var(--text-main);
    margin: 40px 0 20px;
    font-weight: 500;
    letter-spacing: .3px;
}
.article-body h2 {
    font-size: 24px;
    padding-left: 14px;
    border-left: 3px solid var(--primary);
}
.article-body h3 { font-size: 20px; }
.article-body h4 { font-size: 17px; }
.article-body a { color: var(--primary); border-bottom: 1px solid rgba(79,124,255,.3); transition: border-color .3s; }
.article-body a:hover { border-bottom-color: var(--primary); }
.article-body img {
    max-width: 100%;
    border-radius: var(--radius-md);
    margin: 36px auto;
    box-shadow: var(--shadow-card);
}
.article-body blockquote {
    background: var(--bg-secondary);
    border-left: 3px solid var(--primary);
    padding: 20px 26px;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    color: var(--text-secondary);
    margin: 32px 0;
    font-size: 16px;
}
.article-body ul {
    margin: 20px 0 28px;
    padding-left: 4px;
}
.article-body ul li {
    position: relative;
    padding-left: 24px;
    margin-bottom: 12px;
    color: #CBD2E0;
}
.article-body ul li::before {
    content: '';
    position: absolute;
    left: 4px;
    top: 12px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    box-shadow: 0 0 8px rgba(79,124,255,.4);
}
.article-body ol {
    margin: 20px 0 28px;
    padding-left: 24px;
    list-style: decimal;
}
.article-body ol li {
    padding-left: 8px;
    margin-bottom: 12px;
    color: #CBD2E0;
}
.article-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 32px 0;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    overflow: hidden;
}
.article-body th, .article-body td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    font-size: 14px;
}
.article-body th { background: rgba(79,124,255,.1); color: var(--text-main); font-weight: 500; }
.article-body td { color: #A0A8BA; }
.article-body tr:last-child td { border-bottom: none; }
.article-body pre {
    background: #111927;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px 24px;
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 14px;
    color: var(--text-main);
    margin: 32px 0;
}
.article-body code {
    font-family: var(--font-mono);
    font-size: .9em;
    background: rgba(79,124,255,.1);
    padding: 2px 6px;
    border-radius: 4px;
    color: var(--secondary);
}
.article-body pre code { background: none; padding: 0; color: inherit; }
.article-body hr {
    border: none;
    height: 1px;
    background: var(--border-color);
    margin: 40px 0;
}

/* ===== Not Found ===== */
.not-found {
    text-align: center;
    padding: 80px 24px;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}
.not-found-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 24px;
    border-radius: 50%;
    background: rgba(79,124,255,.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: var(--primary);
}
.not-found p { font-size: 15px; color: var(--text-secondary); margin-bottom: 28px; }
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 32px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #fff;
    font-size: 14px;
    font-weight: 500;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-glow);
    transition: all .3s ease;
}
.btn-primary:hover { box-shadow: 0 0 36px rgba(79,124,255,.6); transform: translateY(-2px); color: #fff; }
.btn-primary:active { transform: translateY(0); }

/* ===== Related Section ===== */
.related-section {
    padding: 0 0 80px;
}
.related-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 36px;
}
.related-title {
    font-size: 26px;
    font-weight: 500;
    letter-spacing: .3px;
    color: var(--text-main);
    position: relative;
    padding-left: 16px;
}
.related-title::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 20px;
    border-radius: 2px;
    background: linear-gradient(180deg, var(--primary), var(--secondary));
    box-shadow: 0 0 12px rgba(79,124,255,.4);
}
.related-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}
.related-card {
    background: linear-gradient(135deg, rgba(255,255,255,.08), rgba(255,255,255,.02));
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: var(--shadow-card);
    transition: all .35s ease;
    display: flex;
    flex-direction: column;
}
.related-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(79,124,255,.5);
}
.related-card-cover {
    position: relative;
    aspect-ratio: 16/9;
    overflow: hidden;
    background: #1A2233;
}
.related-card-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .5s ease;
}
.related-card:hover .related-card-cover img { transform: scale(1.04); }
.related-card-tag {
    position: absolute;
    top: 14px;
    left: 14px;
    z-index: 2;
    padding: 3px 12px;
    background: rgba(10,14,23,.6);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255,255,255,.12);
    border-radius: var(--radius-tag);
    color: var(--text-main);
    font-size: 12px;
    letter-spacing: .4px;
}
.related-card-body {
    padding: 22px 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
}
.related-card-title {
    font-size: 18px;
    font-weight: 500;
    color: var(--text-main);
    line-height: 1.5;
    margin-bottom: 12px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.related-card-desc {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 18px;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.related-card-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: var(--primary);
    transition: gap .3s ease;
}
.related-card:hover .related-card-link { gap: 12px; }

/* ===== Back Home ===== */
.back-home {
    text-align: center;
    padding: 0 0 80px;
}
.back-home a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 14px;
    transition: color .3s ease, gap .3s ease;
}
.back-home a:hover { color: var(--primary); gap: 12px; }
.back-home a i { font-size: 12px; }

/* ===== Footer ===== */
.site-footer {
    border-top: 1px solid var(--border-color);
    padding: 48px 0 24px;
    background: #080C14;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
}
.footer-logo {
    font-size: 18px;
    font-weight: 600;
    background: linear-gradient(90deg, #fff, rgba(255,255,255,.7));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    display: block;
    margin-bottom: 12px;
}
.footer-brand p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 240px;
}
.footer-nav h4, .footer-contact h4 {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-main);
    margin-bottom: 16px;
    letter-spacing: .4px;
}
.footer-nav a {
    display: block;
    font-size: 13px;
    color: var(--text-secondary);
    padding: 5px 0;
    transition: color .3s ease;
}
.footer-nav a:hover { color: var(--primary); }
.footer-contact p {
    font-size: 13px;
    color: var(--text-secondary);
    padding: 5px 0;
}
.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 24px;
    text-align: center;
    font-size: 12px;
    color: var(--text-placeholder);
}

/* ===== Scroll Animation ===== */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(24px); }
    to { opacity: 1; transform: translateY(0); }
}
.article-main .article-container { animation: fadeInUp .6s ease both; }

/* ===== Responsive ===== */
@media screen and (max-width: 1024px) {
    .main-nav { gap: 28px; }
    .article-title { font-size: 30px; }
}
@media screen and (max-width: 768px) {
    .main-nav { display: none; }
    .mobile-menu-toggle { display: block; }
    .main-nav.mobile-open {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(10,14,23,.96);
        backdrop-filter: blur(24px);
        -webkit-backdrop-filter: blur(24px);
        gap: 38px;
        z-index: 999;
        border-bottom: 1px solid var(--border-light);
    }
    .main-nav.mobile-open .nav-link {
        font-size: 20px;
        font-weight: 300;
        letter-spacing: 2px;
    }
    .main-nav.mobile-open .nav-link.active::after {
        width: 32px;
        height: 4px;
    }
    .article-hero { min-height: 200px; padding-top: 100px; }
    .breadcrumb { padding: 18px 0 22px; font-size: 12px; }
    .breadcrumb .current { max-width: 200px; }
    .article-main { padding: 36px 0 50px; }
    .article-title { font-size: 26px; }
    .article-meta { gap: 12px; font-size: 12px; }
    .article-body { font-size: 16px; line-height: 1.85; }
    .article-body p { margin-bottom: 24px; }
    .related-grid { grid-template-columns: 1fr; gap: 18px; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
    .footer-brand { grid-column: 1 / -1; }
    .back-home { padding-bottom: 50px; }
}
@media screen and (max-width: 520px) {
    .grid-container { padding: 0 18px; }
    .site-logo { font-size: 17px; }
    .site-header-inner { height: 64px; }
    .site-header { height: 64px; }
    .mobile-menu-toggle { padding: 6px 14px; font-size: 13px; }
    .article-hero { min-height: 180px; }
    .breadcrumb { font-size: 11px; gap: 6px; }
    .article-title { font-size: 22px; }
    .article-meta { flex-wrap: wrap; gap: 10px; }
    .footer-grid { grid-template-columns: 1fr; gap: 24px; }
    .footer-nav h4, .footer-contact h4 { margin-bottom: 12px; }
    .related-card-body { padding: 18px; }
    .related-title { font-size: 22px; }
}

/* roulang page: category1 */
:root {
      --bg: #0A0E17;
      --bg-2: #101827;
      --card-bg: rgba(255, 255, 255, 0.04);
      --glass-1: rgba(255, 255, 255, 0.08);
      --glass-2: rgba(255, 255, 255, 0.02);
      --primary: #4F7CFF;
      --accent: #35E0D4;
      --gold: #D9B36C;
      --text: #E9EDF5;
      --text-secondary: #8A93A6;
      --placeholder: #5B6478;
      --border: rgba(255, 255, 255, 0.08);
      --radius-lg: 16px;
      --radius-md: 12px;
      --radius-sm: 8px;
      --shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
      --shadow-hover: 0 16px 48px rgba(79, 124, 255, 0.15);
      --container-width: 1200px;
      --transition: 0.3s ease;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, sans-serif;
      background: var(--bg);
      color: var(--text);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

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

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

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

    ul, ol {
      list-style: none;
    }

    h1, h2, h3, h4 {
      font-weight: 500;
      line-height: 1.4;
    }

    .grid-container {
      max-width: var(--container-width);
      margin: 0 auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    .section {
      padding: 80px 0;
    }

    /* ===== 导航 ===== */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 72px;
      z-index: 100;
      background: transparent;
      transition: background 0.4s ease, box-shadow 0.4s ease, border-color 0.4s ease;
      border-bottom: 1px solid transparent;
    }

    .site-header.scrolled {
      background: rgba(10, 14, 23, 0.85);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }

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

    .brand-logo {
      font-size: 20px;
      font-weight: 600;
      letter-spacing: 0.5px;
      color: var(--text);
      white-space: nowrap;
    }

    .main-nav {
      display: flex;
      align-items: center;
      gap: 36px;
    }

    .nav-link {
      position: relative;
      color: var(--text-secondary);
      font-size: 15px;
      font-weight: 400;
      padding: 4px 0;
      transition: color var(--transition);
    }

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

    .nav-link.active {
      color: var(--text);
    }

    .nav-link.active::after {
      content: "";
      position: absolute;
      left: 50%;
      transform: translateX(-50%);
      bottom: -6px;
      width: 24px;
      height: 4px;
      border-radius: 4px;
      background: linear-gradient(90deg, var(--primary), var(--accent));
      box-shadow: 0 0 12px rgba(79, 124, 255, 0.4);
    }

    .nav-toggle {
      display: none;
      background: none;
      border: none;
      color: var(--text);
      font-size: 15px;
      font-family: inherit;
      padding: 8px 12px;
      cursor: pointer;
      letter-spacing: 1px;
    }

    /* 移动端菜单 */
    .mobile-menu {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100vh;
      background: rgba(10, 14, 23, 0.95);
      backdrop-filter: blur(20px);
      z-index: 120;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 32px;
    }

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

    .mobile-menu .nav-link {
      font-size: 22px;
      color: var(--text);
      font-weight: 300;
      opacity: 0.85;
    }

    .mobile-menu .nav-link.active {
      opacity: 1;
      color: var(--accent);
    }

    .menu-close {
      position: absolute;
      top: 20px;
      right: 24px;
      background: none;
      border: none;
      color: var(--text);
      font-size: 16px;
      cursor: pointer;
      padding: 8px;
      font-family: inherit;
    }

    /* ===== Hero ===== */
    .category-hero {
      position: relative;
      min-height: 320px;
      display: flex;
      align-items: center;
      background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
      padding: 140px 0 80px;
    }

    .category-hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(10, 14, 23, 0.4) 0%, rgba(10, 14, 23, 0.85) 100%);
    }

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

    .breadcrumb {
      font-size: 13px;
      color: var(--text-secondary);
      margin-bottom: 18px;
    }

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

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

    .category-hero h1 {
      font-size: 38px;
      font-weight: 600;
      letter-spacing: 1px;
      line-height: 1.35;
      margin-bottom: 16px;
      background: linear-gradient(120deg, #ffffff 30%, var(--accent) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .hero-desc {
      font-size: 16px;
      color: rgba(233, 237, 245, 0.8);
      max-width: 760px;
      line-height: 1.9;
    }

    .hero-buttons {
      margin-top: 30px;
      display: flex;
      align-items: center;
      gap: 24px;
      flex-wrap: wrap;
    }

    .btn-primary {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 12px 28px;
      border-radius: var(--radius-sm);
      background: linear-gradient(135deg, var(--primary), var(--accent));
      color: #fff;
      font-weight: 500;
      font-size: 15px;
      box-shadow: 0 0 24px rgba(79, 124, 255, 0.4);
      cursor: pointer;
      transition: box-shadow var(--transition), transform var(--transition), filter var(--transition);
      border: none;
    }

    .btn-primary:hover {
      box-shadow: 0 0 36px rgba(79, 124, 255, 0.6);
      filter: brightness(1.1);
      transform: translateY(-2px);
      color: #fff;
    }

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

    .btn-text {
      display: inline-flex;
      align-items: center;
      color: var(--accent);
      font-size: 15px;
      border-bottom: 1px dashed rgba(53, 224, 212, 0.5);
      padding-bottom: 2px;
      transition: border-color var(--transition);
    }

    .btn-text:hover {
      border-bottom-color: var(--accent);
      color: var(--accent);
    }

    /* ===== 内容分区 ===== */
    .access-section {
      background: var(--bg);
    }

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

    .section-head h2 {
      font-size: 26px;
      font-weight: 500;
      letter-spacing: 0.3px;
      position: relative;
      padding-left: 16px;
      margin-bottom: 12px;
    }

    .section-head h2::before {
      content: "";
      position: absolute;
      left: 0;
      top: 6px;
      width: 4px;
      height: 22px;
      border-radius: 2px;
      background: linear-gradient(180deg, var(--primary), var(--accent));
    }

    .section-head p {
      color: var(--text-secondary);
      font-size: 15px;
      max-width: 640px;
      line-height: 1.8;
    }

    .glass-card {
      background: linear-gradient(135deg, var(--glass-1), var(--glass-2));
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-lg);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      box-shadow: var(--shadow);
      overflow: hidden;
      transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
    }

    .glass-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(79, 124, 255, 0.5);
    }

    .access-main {
      margin-bottom: 24px;
    }

    .access-main .card-img {
      height: 220px;
      width: 100%;
      object-fit: cover;
    }

    .card-img-wrap {
      position: relative;
    }

    .card-tag {
      position: absolute;
      top: 14px;
      left: 14px;
      background: rgba(10, 14, 23, 0.7);
      backdrop-filter: blur(10px);
      border: 1px solid rgba(255, 255, 255, 0.15);
      padding: 4px 14px;
      border-radius: 6px;
      font-size: 12px;
      color: var(--accent);
      letter-spacing: 0.5px;
    }

    .card-body {
      padding: 22px 24px 24px;
    }

    .card-body h3 {
      font-size: 18px;
      font-weight: 500;
      margin-bottom: 10px;
      line-height: 1.5;
    }

    .card-body p {
      color: var(--text-secondary);
      font-size: 15px;
      line-height: 1.8;
    }

    .card-bottom {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-top: 18px;
      padding-top: 14px;
      border-top: 1px solid var(--border);
    }

    .card-bottom span {
      font-size: 13px;
      color: var(--text-secondary);
    }

    .card-bottom .arrow {
      color: var(--accent);
      font-size: 14px;
      transition: transform 0.3s ease;
    }

    .glass-card:hover .card-bottom .arrow {
      transform: translateX(4px);
    }

    .access-subgrid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
      margin-bottom: 24px;
    }

    .access-subgrid .card-img {
      height: 160px;
      width: 100%;
      object-fit: cover;
    }

    .side-card {
      padding: 28px 24px;
      height: 100%;
      min-height: 420px;
      display: flex;
      flex-direction: column;
    }

    .side-card h3 {
      font-size: 18px;
      font-weight: 500;
      margin-bottom: 24px;
      padding-bottom: 16px;
      border-bottom: 1px solid var(--border);
    }

    .side-list li {
      display: flex;
      gap: 12px;
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.7;
      padding: 12px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    }

    .side-list li i {
      color: var(--gold);
      font-size: 12px;
      margin-top: 5px;
    }

    .side-list li span {
      color: var(--text);
      font-weight: 500;
    }

    .side-icon {
      margin-top: auto;
      padding-top: 30px;
      display: flex;
      align-items: center;
      gap: 12px;
      color: var(--text-secondary);
      font-size: 13px;
    }

    /* ===== 适用场景 ===== */
    .scene-section {
      background: var(--bg-2);
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
    }

    .scene-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

    .scene-item {
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 32px;
      transition: background var(--transition), border-color var(--transition), transform var(--transition);
    }

    .scene-item:hover {
      background: rgba(79, 124, 255, 0.06);
      border-color: rgba(79, 124, 255, 0.3);
      transform: translateY(-2px);
    }

    .scene-item .scene-icon {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      background: linear-gradient(135deg, rgba(79, 124, 255, 0.2), rgba(53, 224, 212, 0.2));
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--accent);
      margin-bottom: 18px;
      font-size: 18px;
    }

    .scene-item h3 {
      font-size: 17px;
      font-weight: 500;
      margin-bottom: 8px;
    }

    .scene-item p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.8;
    }

    /* ===== 流程 ===== */
    .process-steps {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 16px;
    }

    .process-step {
      text-align: center;
      padding: 30px 16px;
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      position: relative;
      transition: border-color var(--transition), transform var(--transition);
    }

    .process-step:hover {
      border-color: rgba(79, 124, 255, 0.4);
      transform: translateY(-3px);
    }

    .step-num {
      font-size: 32px;
      font-weight: 700;
      color: transparent;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      -webkit-background-clip: text;
      background-clip: text;
      margin-bottom: 10px;
      line-height: 1.2;
    }

    .process-step h3 {
      font-size: 15px;
      font-weight: 500;
      margin-bottom: 6px;
    }

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

    /* ===== FAQ ===== */
    .faq-section {
      background: var(--bg);
    }

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

    .faq-item {
      border-bottom: 1px solid var(--border);
    }

    .faq-item:first-of-type {
      border-top: 1px solid var(--border);
    }

    .faq-item summary {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 18px 0;
      cursor: pointer;
      font-size: 16px;
      font-weight: 500;
      color: var(--text);
      list-style: none;
      transition: color var(--transition);
    }

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

    .faq-item summary:hover {
      color: var(--accent);
    }

    .faq-item summary .faq-icon {
      flex-shrink: 0;
      width: 24px;
      height: 24px;
      display: flex;
      align-items: center;
      justify-content: center;
      border: 1px solid var(--border);
      border-radius: 50%;
      font-size: 14px;
      color: var(--text-secondary);
      transition: all var(--transition);
    }

    .faq-item[open] summary .faq-icon {
      background: linear-gradient(135deg, var(--primary), var(--accent));
      color: #fff;
      border-color: transparent;
      transform: rotate(180deg);
    }

    .faq-item .faq-answer {
      padding: 0 0 18px;
      font-size: 15px;
      color: var(--text-secondary);
      line-height: 1.8;
      max-width: 720px;
    }

    /* ===== CTA ===== */
    .cta-section {
      padding: 30px 0 80px;
    }

    .cta-card {
      background: linear-gradient(135deg, rgba(79, 124, 255, 0.18), rgba(53, 224, 212, 0.08)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
      border: 1px solid rgba(79, 124, 255, 0.3);
      border-radius: 20px;
      padding: 64px 48px;
      text-align: center;
      backdrop-filter: blur(12px);
      position: relative;
      overflow: hidden;
    }

    .cta-card::before {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(10, 14, 23, 0.3), rgba(10, 14, 23, 0.8));
    }

    .cta-card > * {
      position: relative;
      z-index: 2;
    }

    .cta-card h2 {
      font-size: 28px;
      margin-bottom: 14px;
    }

    .cta-card p {
      max-width: 640px;
      margin: 0 auto 30px;
      color: rgba(233, 237, 245, 0.85);
      line-height: 1.8;
    }

    .cta-buttons {
      display: flex;
      gap: 20px;
      justify-content: center;
      flex-wrap: wrap;
    }

    /* ===== 返回首页 ===== */
    .back-home {
      text-align: center;
      padding: 20px 0 60px;
    }

    .back-home a {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: var(--text-secondary);
      font-size: 14px;
      transition: color var(--transition);
    }

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

    /* ===== 页脚 ===== */
    .site-footer {
      border-top: 1px solid var(--border);
      padding: 48px 0 24px;
      background: rgba(10, 14, 23, 0.6);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr;
      gap: 48px;
      margin-bottom: 32px;
    }

    .footer-logo {
      font-size: 20px;
      font-weight: 600;
      letter-spacing: 0.5px;
      color: var(--text);
    }

    .footer-brand p {
      font-size: 13px;
      color: var(--text-secondary);
      margin-top: 12px;
      line-height: 1.8;
      max-width: 240px;
    }

    .footer-nav h4,
    .footer-contact h4 {
      font-size: 14px;
      font-weight: 500;
      margin-bottom: 16px;
      color: var(--text);
    }

    .footer-nav a {
      display: block;
      font-size: 13px;
      color: var(--text-secondary);
      padding: 4px 0;
      transition: color var(--transition);
    }

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

    .footer-contact p {
      font-size: 13px;
      color: var(--text-secondary);
      line-height: 2;
    }

    .footer-bottom {
      border-top: 1px solid var(--border);
      padding-top: 20px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 8px;
    }

    .footer-bottom span {
      font-size: 12px;
      color: var(--placeholder);
    }

    /* ===== 响应式 ===== */
    @media (max-width: 1024px) {
      .main-nav {
        gap: 24px;
      }
      .access-subgrid {
        grid-template-columns: 1fr;
      }
      .process-steps {
        grid-template-columns: repeat(3, 1fr);
      }
    }

    @media (max-width: 768px) {
      .section {
        padding: 48px 0;
      }
      .main-nav {
        display: none;
      }
      .nav-toggle {
        display: inline-block;
      }
      .category-hero {
        min-height: 280px;
        padding: 120px 0 60px;
      }
      .category-hero h1 {
        font-size: 28px;
      }
      .hero-desc {
        font-size: 15px;
      }
      .section-head h2 {
        font-size: 21px;
      }
      .scene-grid {
        grid-template-columns: 1fr;
      }
      .process-steps {
        grid-template-columns: 1fr 1fr;
      }
      .cta-card {
        padding: 40px 24px;
      }
      .cta-card h2 {
        font-size: 22px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
      }
      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }
      .access-main .card-img {
        height: 180px;
      }
      .access-subgrid .card-img {
        height: 160px;
      }
      .side-card {
        min-height: 0;
      }
    }

    @media (max-width: 520px) {
      .grid-container {
        padding-left: 16px;
        padding-right: 16px;
      }
      .process-steps {
        grid-template-columns: 1fr;
      }
      .hero-buttons {
        gap: 14px;
      }
      .btn-primary {
        padding: 10px 20px;
        font-size: 14px;
      }
      .cta-buttons {
        flex-direction: column;
        align-items: center;
      }
    }

/* roulang page: category2 */
:root {
            --bg-primary: #0A0E17;
            --bg-secondary: rgba(255, 255, 255, 0.04);
            --bg-card: rgba(255, 255, 255, 0.03);
            --primary-blue: #4F7CFF;
            --primary-cyan: #35E0D4;
            --primary-gradient: linear-gradient(135deg, #4F7CFF 0%, #35E0D4 100%);
            --accent-gold: #D9B36C;
            --text-primary: #E9EDF5;
            --text-secondary: #8A93A6;
            --text-placeholder: #4A5568;
            --border-color: rgba(255, 255, 255, 0.08);
            --border-light: rgba(255, 255, 255, 0.1);
            --border-blue: rgba(79, 124, 255, 0.5);
            --radius-large: 16px;
            --radius-medium: 12px;
            --radius-small: 8px;
            --shadow-card: 0 12px 40px rgba(0, 0, 0, 0.3);
            --shadow-hover: 0 16px 48px rgba(79, 124, 255, 0.15);
            --shadow-glow: 0 0 24px rgba(79, 124, 255, 0.4);
            --shadow-glow-lg: 0 0 36px rgba(79, 124, 255, 0.5);
            --spacing-xl: 90px;
            --spacing-lg: 70px;
            --spacing-md: 50px;
            --spacing-sm: 32px;
            --spacing-xs: 16px;
            --font-primary: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        }

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

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

        body {
            font-family: var(--font-primary);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.9;
            font-weight: 400;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-medium);
        }

        a {
            color: var(--text-primary);
            text-decoration: none;
            transition: all 0.3s ease;
        }

        button,
        input {
            font-family: var(--font-primary);
            outline: none;
        }

        ::selection {
            background-color: rgba(79, 124, 255, 0.3);
            color: var(--text-primary);
        }

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

        .container-full {
            width: 100%;
            padding: 0;
        }

        .text-gradient {
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            color: transparent;
        }

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

        .section-padding {
            padding: var(--spacing-xl) 0;
        }

        .section-padding-md {
            padding: var(--spacing-lg) 0;
        }

        .section-title {
            font-size: 26px;
            font-weight: 500;
            letter-spacing: 0.3px;
            line-height: 1.4;
            margin-bottom: 20px;
        }

        .section-title-bar {
            border-left: 3px solid var(--primary-blue);
            padding-left: 16px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--primary-gradient);
            color: #fff;
            border: none;
            padding: 14px 32px;
            border-radius: var(--radius-small);
            font-size: 15px;
            font-weight: 500;
            cursor: pointer;
            box-shadow: var(--shadow-glow);
            transition: all 0.3s ease;
            letter-spacing: 0.5px;
            line-height: 1.6;
        }

        .btn-primary:hover {
            box-shadow: var(--shadow-glow-lg);
            filter: brightness(1.1);
            color: #fff;
            transform: translateY(-1px);
        }

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

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            color: var(--text-primary);
            border: 1px solid var(--border-light);
            padding: 14px 32px;
            border-radius: var(--radius-small);
            font-size: 15px;
            font-weight: 400;
            cursor: pointer;
            transition: all 0.3s ease;
            letter-spacing: 0.5px;
        }

        .btn-outline:hover {
            border-color: var(--primary-blue);
            color: var(--text-primary);
            background: rgba(79, 124, 255, 0.06);
        }

        .btn-text {
            display: inline-flex;
            align-items: center;
            color: var(--text-primary);
            font-size: 15px;
            font-weight: 400;
            border-bottom: 1px solid transparent;
            padding-bottom: 2px;
            transition: all 0.3s ease;
            background: none;
            border: 0;
            cursor: pointer;
            letter-spacing: 0.3px;
        }

        .btn-text:hover {
            border-bottom-color: var(--primary-blue);
        }

        .glass-card {
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02));
            border: 1px solid var(--border-light);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-radius: var(--radius-large);
            box-shadow: var(--shadow-card);
            transition: all 0.3s ease;
        }

        .glass-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: rgba(79, 124, 255, 0.3);
            transform: translateY(-3px);
        }

        /* ===== 顶部导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: 72px;
            background: transparent;
            transition: background 0.3s ease, box-shadow 0.3s ease, backdrop-filter 0.3s ease;
        }

        .site-header.scrolled {
            background: rgba(10, 14, 23, 0.85);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

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

        .brand-logo {
            font-size: 20px;
            font-weight: 600;
            letter-spacing: 0.5px;
            color: var(--text-primary);
            white-space: nowrap;
            flex-shrink: 0;
        }

        .brand-logo span {
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 36px;
        }

        .nav-link {
            position: relative;
            color: var(--text-secondary);
            font-size: 15px;
            font-weight: 400;
            letter-spacing: 0.3px;
            padding: 6px 0;
            transition: color 0.3s ease;
        }

        .nav-link:hover {
            color: var(--text-primary);
        }

        .nav-link.active {
            color: var(--text-primary);
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 4px;
            border-radius: 2px;
            background: var(--primary-gradient);
            box-shadow: 0 0 12px rgba(79, 124, 255, 0.5);
        }

        .nav-menu-btn {
            display: none;
            background: none;
            border: 0;
            color: var(--text-primary);
            font-size: 14px;
            letter-spacing: 2px;
            cursor: pointer;
            padding: 8px 4px;
            line-height: 1;
            font-weight: 400;
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100vh;
            background: rgba(10, 14, 23, 0.97);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            z-index: 999;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 28px;
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.3s ease, visibility 0.3s ease;
        }

        .mobile-menu.open {
            opacity: 1;
            visibility: visible;
        }

        .mobile-menu a {
            font-size: 26px;
            font-weight: 300;
            letter-spacing: 2px;
            color: var(--text-primary);
            padding: 8px 0;
        }

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

        .mobile-menu-close {
            position: absolute;
            top: 24px;
            right: 24px;
            background: none;
            border: 0;
            color: var(--text-primary);
            font-size: 14px;
            letter-spacing: 2px;
            cursor: pointer;
        }

        @media (max-width: 768px) {
            .main-nav {
                display: none;
            }
            .nav-menu-btn {
                display: block;
            }
        }

        /* ===== Hero 区 ===== */
        .page-hero {
            position: relative;
            min-height: 320px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, #0A0E17 0%, #111827 100%);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            padding: 120px 0 60px 0;
            text-align: center;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(0, 0, 0, 0.5) 0%, rgba(10, 14, 23, 0.7) 100%);
        }

        .page-hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
            padding: 0 24px;
        }

        .page-hero h1 {
            font-size: 34px;
            line-height: 1.35;
            letter-spacing: 0.5px;
            font-weight: 600;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .page-hero h1 .text-gradient {
            font-weight: 600;
        }

        .page-hero p.subtitle {
            font-size: 16px;
            font-weight: 300;
            line-height: 1.8;
            color: rgba(233, 237, 245, 0.75);
            margin-bottom: 0;
        }

        .page-hero .hero-divider {
            width: 64px;
            height: 1px;
            background: var(--border-light);
            margin: 20px auto 0;
        }

        .breadcrumb-wrap {
            background: transparent;
            padding: 16px 0;
            border-bottom: 1px solid var(--border-color);
            font-size: 13px;
            line-height: 1.6;
        }

        .breadcrumb-wrap .grid-container {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 6px;
        }

        .breadcrumb-wrap a {
            color: var(--text-secondary);
            transition: color 0.2s;
            font-size: 13px;
        }

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

        .breadcrumb-wrap .separator {
            color: var(--text-placeholder);
            margin: 0 2px;
            font-size: 12px;
        }

        .breadcrumb-wrap .current {
            color: var(--text-primary);
            font-size: 13px;
        }

        /* ===== 平台核心功能 ===== */
        .feature-section {
            position: relative;
            background: var(--bg-primary);
        }

        .feature-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            margin-top: 40px;
        }

        .feature-card {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-large);
            padding: 36px 32px;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(79, 124, 255, 0.3), transparent);
            opacity: 0;
            transition: opacity 0.3s ease;
        }

        .feature-card:hover {
            background: rgba(255, 255, 255, 0.06);
            border-color: rgba(79, 124, 255, 0.3);
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
        }

        .feature-card:hover::before {
            opacity: 1;
        }

        .feature-card .icon-wrap {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: linear-gradient(135deg, rgba(79, 124, 255, 0.2), rgba(53, 224, 212, 0.2));
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            font-size: 20px;
            color: var(--primary-blue);
        }

        .feature-card h3 {
            font-size: 18px;
            font-weight: 500;
            line-height: 1.5;
            margin-bottom: 10px;
            color: var(--text-primary);
        }

        .feature-card p {
            font-size: 15px;
            line-height: 1.8;
            color: var(--text-secondary);
            margin-bottom: 0;
        }

        /* ===== 适用场景 ===== */
        .scenario-section {
            background: linear-gradient(180deg, var(--bg-primary) 0%, #0D1322 100%);
        }

        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 40px;
        }

        .scenario-item {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-large);
            padding: 32px 28px;
            text-align: left;
            transition: all 0.3s ease;
            position: relative;
        }

        .scenario-item:hover {
            border-color: rgba(53, 224, 212, 0.3);
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
            background: rgba(255, 255, 255, 0.05);
        }

        .scenario-item .num-tag {
            display: inline-block;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: rgba(79, 124, 255, 0.15);
            color: var(--primary-blue);
            font-size: 14px;
            font-weight: 500;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 18px;
            border: 1px solid rgba(79, 124, 255, 0.2);
        }

        .scenario-item h3 {
            font-size: 17px;
            font-weight: 500;
            margin-bottom: 8px;
            color: var(--text-primary);
            line-height: 1.5;
        }

        .scenario-item p {
            font-size: 14px;
            line-height: 1.8;
            color: var(--text-secondary);
            margin-bottom: 0;
        }

        /* ===== 数据指标区块 ===== */
        .metric-section {
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
            background: transparent;
        }

        .metric-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 40px;
            text-align: center;
        }

        .metric-item .number {
            font-size: 34px;
            font-weight: 700;
            line-height: 1.3;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-shadow: 0 0 30px rgba(79, 124, 255, 0.3);
        }

        .metric-item .label {
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: 6px;
        }

        .metric-divider {
            width: 1px;
            height: 48px;
            background: var(--border-color);
            align-self: center;
        }

        /* ===== 操作流程 ===== */
        .flow-section {
            background: var(--bg-primary);
        }

        .flow-steps {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            margin-top: 48px;
            position: relative;
        }

        .flow-steps::before {
            content: '';
            position: absolute;
            top: 32px;
            left: 10%;
            right: 10%;
            height: 1px;
            background: linear-gradient(90deg, rgba(79, 124, 255, 0.15), rgba(53, 224, 212, 0.15), rgba(79, 124, 255, 0.15));
        }

        .flow-step {
            text-align: center;
            position: relative;
            z-index: 1;
        }

        .flow-step .step-icon {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: linear-gradient(135deg, rgba(79, 124, 255, 0.2), rgba(53, 224, 212, 0.2));
            border: 1px solid rgba(79, 124, 255, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 22px;
            color: var(--primary-blue);
            backdrop-filter: blur(12px);
        }

        .flow-step .step-num {
            font-size: 13px;
            color: var(--accent-gold);
            letter-spacing: 1px;
            margin-bottom: 8px;
            display: block;
        }

        .flow-step h4 {
            font-size: 17px;
            font-weight: 500;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .flow-step p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 240px;
            margin: 0 auto;
        }

        /* ===== FAQ 手风琴 ===== */
        .faq-section {
            background: linear-gradient(180deg, var(--bg-primary) 0%, #0D1322 100%);
        }

        .faq-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            margin-top: 40px;
        }

        .faq-list {
            border-top: 1px solid var(--border-color);
        }

        .faq-item {
            border-bottom: 1px solid var(--border-color);
            padding: 20px 0;
            cursor: pointer;
        }

        .faq-question {
            font-size: 16px;
            font-weight: 500;
            color: var(--text-primary);
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: color 0.2s;
            line-height: 1.6;
            user-select: none;
        }

        .faq-question:hover {
            color: var(--primary-cyan);
        }

        .faq-question .icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            font-size: 16px;
            font-weight: 300;
            border: 1px solid var(--border-color);
            border-radius: 50%;
            margin-left: 16px;
            transition: transform 0.3s ease, color 0.3s ease;
        }

        .faq-item.active .faq-question .icon {
            transform: rotate(45deg);
            border-color: var(--primary-blue);
            color: var(--primary-blue);
        }

        .faq-answer {
            display: none;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            padding: 16px 32px 0 0;
        }

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

        .faq-side {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .faq-side-card {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-large);
            padding: 28px;
            transition: all 0.3s ease;
        }

        .faq-side-card:hover {
            border-color: rgba(79, 124, 255, 0.3);
            background: rgba(255, 255, 255, 0.05);
        }

        .faq-side-card h4 {
            font-size: 16px;
            font-weight: 500;
            margin-bottom: 12px;
            color: var(--text-primary);
        }

        .faq-side-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        .tag-mini {
            display: inline-block;
            padding: 3px 12px;
            border-radius: 6px;
            font-size: 13px;
            font-weight: 400;
            letter-spacing: 0.5px;
            background: rgba(79, 124, 255, 0.1);
            border: 1px solid rgba(79, 124, 255, 0.2);
            color: var(--primary-cyan);
        }

        /* ===== 内容图文区 ===== */
        .media-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: center;
        }

        .media-image {
            border-radius: var(--radius-large);
            overflow: hidden;
            position: relative;
            background: #1A2233;
        }

        .media-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
        }

        .media-content h3 {
            font-size: 22px;
            font-weight: 500;
            line-height: 1.5;
            margin-bottom: 16px;
        }

        .media-content p {
            font-size: 15px;
            line-height: 1.9;
            color: var(--text-secondary);
            margin-bottom: 16px;
        }

        .media-content .feature-lines {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-top: 24px;
        }

        .feature-line {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 15px;
            color: var(--text-primary);
        }

        .feature-line i {
            width: 20px;
            text-align: center;
            color: var(--primary-cyan);
            font-size: 14px;
        }

        /* ===== CTA 区 ===== */
        .cta-section {
            padding: 80px 0;
        }

        .cta-card {
            background: linear-gradient(135deg, rgba(79, 124, 255, 0.15) 0%, rgba(53, 224, 212, 0.1) 100%);
            border: 1px solid rgba(79, 124, 255, 0.2);
            border-radius: var(--radius-large);
            padding: 60px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
            backdrop-filter: blur(20px);
        }

        .cta-card::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(ellipse, rgba(79, 124, 255, 0.08) 0%, transparent 70%);
            pointer-events: none;
        }

        .cta-card h2 {
            font-size: 26px;
            font-weight: 500;
            margin-bottom: 12px;
            color: var(--text-primary);
            position: relative;
        }

        .cta-card p {
            font-size: 15px;
            color: var(--text-secondary);
            margin-bottom: 32px;
            max-width: 480px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.8;
        }

        .cta-btn-group {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
            position: relative;
        }

        /* ===== 返回首页链接 ===== */
        .back-home-wrap {
            padding: 40px 0 80px;
            text-align: center;
        }

        .back-home-wrap a {
            font-size: 15px;
            color: var(--text-secondary);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: all 0.3s ease;
            border-bottom: 1px solid transparent;
            padding-bottom: 4px;
        }

        .back-home-wrap a:hover {
            color: var(--primary-cyan);
            border-bottom-color: var(--primary-cyan);
        }

        .back-home-wrap a i {
            transition: transform 0.3s ease;
            font-size: 14px;
        }

        .back-home-wrap a:hover i {
            transform: translateX(-4px);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-primary);
            border-top: 1px solid var(--border-color);
            padding: 48px 0 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand .footer-logo {
            font-size: 20px;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 12px;
            display: inline-block;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 240px;
            margin-bottom: 0;
        }

        .footer-nav h4,
        .footer-contact h4 {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-primary);
            margin-bottom: 16px;
            letter-spacing: 1px;
        }

        .footer-nav a {
            display: block;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 2.2;
            transition: color 0.2s;
        }

        .footer-nav a:hover {
            color: var(--primary-cyan);
        }

        .footer-contact p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 2.2;
            margin-bottom: 0;
        }

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

        .footer-bottom span {
            font-size: 12px;
            color: var(--text-secondary);
        }

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

            .metric-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px;
            }

            .metric-divider {
                display: none;
            }
        }

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

            .section-padding-md {
                padding: 40px 0;
            }

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

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

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

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

            .flow-steps::before {
                display: none;
            }

            .media-row {
                grid-template-columns: 1fr;
            }

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

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

            .page-hero {
                min-height: 280px;
                padding: 100px 16px 40px 16px;
            }

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

            .section-title {
                font-size: 21px;
            }

            .grid-container {
                padding: 0 16px;
            }

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

        @media (max-width: 520px) {
            .metric-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }

            .metric-item .number {
                font-size: 28px;
            }

            .cta-btn-group {
                flex-direction: column;
                width: 100%;
            }

            .cta-btn-group .btn-primary,
            .cta-btn-group .btn-outline {
                width: 100%;
            }

            .nav-link {
                font-size: 13px;
            }
        }

/* roulang page: category3 */
:root {
            --bg-primary: #0A0E17;
            --bg-card: rgba(255, 255, 255, 0.04);
            --bg-glass: linear-gradient(135deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02));
            --accent-blue: #4F7CFF;
            --accent-cyan: #35E0D4;
            --accent-gold: #D9B36C;
            --text-primary: #E9EDF5;
            --text-secondary: #8A93A6;
            --text-placeholder: #4A5568;
            --border-color: rgba(255, 255, 255, 0.08);
            --border-light: rgba(255, 255, 255, 0.1);
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --radius-tag: 6px;
            --shadow-card: 0 12px 40px rgba(0, 0, 0, 0.3);
            --shadow-hover: 0 16px 48px rgba(79, 124, 255, 0.15);
            --glow: 0 0 24px rgba(79, 124, 255, 0.4);
            --spacing-section: 80px;
            --spacing-mobile: 40px;
            --transition: 0.3s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }

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

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

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

        .grid-container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 72px;
            z-index: 1000;
            background: transparent;
            transition: background var(--transition), border-color var(--transition);
            border-bottom: 1px solid transparent;
        }

        .site-header.scrolled {
            background: rgba(10, 14, 23, 0.85);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

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

        .brand-logo {
            font-size: 22px;
            font-weight: 600;
            color: var(--text-primary);
            letter-spacing: 0.3px;
            white-space: nowrap;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .brand-logo:hover {
            opacity: 0.85;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 36px;
        }

        .main-nav .nav-link {
            font-size: 15px;
            color: var(--text-secondary);
            position: relative;
            padding: 6px 0;
            letter-spacing: 0.3px;
            transition: color var(--transition);
        }

        .main-nav .nav-link:hover {
            color: var(--text-primary);
        }

        .main-nav .nav-link.active {
            color: var(--text-primary);
        }

        .main-nav .nav-link.active::after {
            content: "";
            position: absolute;
            bottom: -2px;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 4px;
            border-radius: 2px;
            background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
            box-shadow: 0 0 10px rgba(79, 124, 255, 0.5);
        }

        .menu-toggle {
            display: none;
            font-size: 15px;
            color: var(--text-primary);
            letter-spacing: 2px;
            padding: 6px 10px;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.04);
        }

        .menu-toggle:hover {
            border-color: rgba(255, 255, 255, 0.25);
        }

        .hero {
            position: relative;
            min-height: 300px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            padding: 140px 20px 80px;
        }

        .hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10, 14, 23, 0.55), rgba(10, 14, 23, 0.9));
            z-index: 1;
        }

        .hero-inner {
            position: relative;
            z-index: 2;
            max-width: 820px;
        }

        .hero-inner h1 {
            font-size: 34px;
            font-weight: 600;
            letter-spacing: 0.5px;
            line-height: 1.35;
            margin-bottom: 16px;
            background: linear-gradient(135deg, #ffffff, var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-inner p {
            font-size: 16px;
            font-weight: 400;
            color: rgba(233, 237, 245, 0.78);
            line-height: 1.8;
            max-width: 580px;
            margin: 0 auto 28px;
        }

        .hero-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 15px;
            color: var(--accent-cyan);
            border-bottom: 1px solid rgba(53, 224, 212, 0.5);
            padding-bottom: 2px;
            transition: border-color var(--transition), color var(--transition);
        }

        .hero-link:hover {
            color: #ffffff;
            border-color: #ffffff;
        }

        .section {
            padding: var(--spacing-section) 0;
        }

        .section-narrow {
            background: transparent;
        }

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

        .section-head h2 {
            font-size: 26px;
            font-weight: 500;
            letter-spacing: 0.3px;
            line-height: 1.4;
            position: relative;
            display: inline-block;
            padding-left: 18px;
        }

        .section-head h2::before {
            content: "";
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 28px;
            border-radius: 2px;
            background: linear-gradient(180deg, var(--accent-blue), var(--accent-cyan));
        }

        .keyword-wall {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px 20px;
            max-width: 900px;
            margin: 0 auto;
        }

        .keyword-wall .kw {
            display: inline-flex;
            align-items: center;
            padding: 8px 24px;
            border-radius: var(--radius-tag);
            border: 1px solid var(--border-light);
            background: rgba(255, 255, 255, 0.04);
            color: var(--text-primary);
            font-weight: 400;
            letter-spacing: 0.3px;
            transition: border-color var(--transition), background var(--transition), transform var(--transition);
        }

        .keyword-wall .kw.lg {
            font-size: 24px;
            padding: 14px 36px;
            border-color: rgba(79, 124, 255, 0.35);
            background: linear-gradient(135deg, rgba(79, 124, 255, 0.1), rgba(53, 224, 212, 0.06));
        }

        .keyword-wall .kw.md {
            font-size: 18px;
            padding: 10px 28px;
        }

        .keyword-wall .kw.sm {
            font-size: 14px;
            padding: 6px 18px;
            color: var(--text-secondary);
        }

        .keyword-wall .kw:hover {
            border-color: rgba(79, 124, 255, 0.6);
            background: rgba(79, 124, 255, 0.08);
            transform: translateY(-2px);
        }

        .wide-banner-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-card);
        }

        .wide-banner-img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
        }

        .wide-banner-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 14, 23, 0.7), rgba(10, 14, 23, 0.35), rgba(10, 14, 23, 0.82));
            z-index: 1;
        }

        .wide-banner-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 620px;
            padding: 40px 24px;
        }

        .wide-banner-content h2 {
            font-size: 28px;
            font-weight: 500;
            letter-spacing: 0.5px;
            margin-bottom: 14px;
            background: linear-gradient(135deg, #ffffff, var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .wide-banner-content p {
            font-size: 15px;
            color: rgba(233, 237, 245, 0.82);
            line-height: 1.8;
        }

        .pair-cards {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
        }

        .pair-card {
            flex: 1;
            min-width: 260px;
            background: var(--bg-glass);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 36px 30px;
            box-shadow: var(--shadow-card);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
        }

        .pair-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(79, 124, 255, 0.5);
        }

        .pair-card .card-icon {
            width: 48px;
            height: 48px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, rgba(79, 124, 255, 0.15), rgba(53, 224, 212, 0.1));
            color: var(--accent-cyan);
            font-size: 20px;
            margin-bottom: 20px;
        }

        .pair-card h3 {
            font-size: 18px;
            font-weight: 500;
            margin-bottom: 14px;
            letter-spacing: 0.3px;
        }

        .pair-card p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        .faq-section {
            border-top: 1px solid var(--border-color);
        }

        .faq-wrap {
            max-width: 780px;
            margin: 0 auto;
        }

        .accordion-item {
            list-style: none;
            border-bottom: 1px solid var(--border-color);
        }

        .accordion-item:first-child {
            border-top: 1px solid var(--border-color);
        }

        .accordion-title {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 4px;
            font-size: 17px;
            font-weight: 500;
            color: var(--text-primary);
            cursor: pointer;
            transition: color var(--transition);
        }

        .accordion-title:hover {
            color: var(--accent-cyan);
        }

        .accordion-title::after {
            content: "+";
            font-size: 22px;
            font-weight: 300;
            color: var(--accent-blue);
            transition: transform var(--transition), color var(--transition);
            line-height: 1;
        }

        .accordion-item.is-active .accordion-title::after {
            content: "−";
            color: var(--accent-cyan);
        }

        .accordion-content {
            padding: 0 4px 20px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .cta-section {
            padding: 100px 0 var(--spacing-section);
            background: linear-gradient(180deg, transparent, rgba(79, 124, 255, 0.06));
        }

        .cta-card {
            max-width: 860px;
            margin: 0 auto;
            background: linear-gradient(135deg, rgba(79, 124, 255, 0.18), rgba(53, 224, 212, 0.08));
            border: 1px solid rgba(79, 124, 255, 0.25);
            border-radius: var(--radius-lg);
            padding: 56px 40px;
            text-align: center;
            box-shadow: 0 20px 60px rgba(79, 124, 255, 0.2);
            position: relative;
            overflow: hidden;
        }

        .cta-card::before {
            content: "";
            position: absolute;
            top: -50%;
            right: -20%;
            width: 260px;
            height: 260px;
            background: radial-gradient(circle, rgba(53, 224, 212, 0.15), transparent 70%);
            border-radius: 50%;
        }

        .cta-card h2 {
            font-size: 28px;
            font-weight: 500;
            letter-spacing: 0.5px;
            margin-bottom: 12px;
            position: relative;
        }

        .cta-card p {
            font-size: 15px;
            color: var(--text-secondary);
            margin-bottom: 32px;
            position: relative;
        }

        .btn-primary {
            display: inline-block;
            padding: 14px 40px;
            font-size: 16px;
            font-weight: 500;
            color: #ffffff;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border-radius: var(--radius-sm);
            box-shadow: var(--glow);
            transition: box-shadow var(--transition), transform var(--transition), filter var(--transition);
            letter-spacing: 1px;
            position: relative;
        }

        .btn-primary:hover {
            box-shadow: 0 0 36px rgba(79, 124, 255, 0.5);
            filter: brightness(1.1);
            transform: translateY(-1px);
            color: #ffffff;
        }

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

        .back-home-wrap {
            text-align: center;
            margin-top: 40px;
        }

        .back-home-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 15px;
            color: var(--text-secondary);
            border-bottom: 1px solid rgba(255, 255, 255, 0.2);
            padding-bottom: 2px;
            transition: color var(--transition), border-color var(--transition);
        }

        .back-home-link:hover {
            color: var(--text-primary);
            border-color: var(--text-primary);
        }

        .site-footer {
            border-top: 1px solid var(--border-color);
            padding: 48px 0 24px;
            margin-top: 40px;
            background: rgba(255, 255, 255, 0.02);
        }

        .footer-grid {
            display: flex;
            gap: 40px;
            flex-wrap: wrap;
            justify-content: space-between;
        }

        .footer-brand {
            max-width: 260px;
        }

        .footer-logo {
            font-size: 20px;
            font-weight: 600;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-secondary);
            margin-top: 12px;
            line-height: 1.6;
        }

        .footer-nav h4,
        .footer-contact h4 {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-primary);
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }

        .footer-nav a {
            display: block;
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 10px;
            transition: color var(--transition);
        }

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

        .footer-contact p {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 8px;
        }

        .footer-bottom {
            margin-top: 48px;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
            text-align: center;
            font-size: 12px;
            color: var(--text-placeholder);
        }

        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--accent-blue);
            outline-offset: 2px;
        }

        @media (max-width: 1024px) {
            .main-nav {
                gap: 24px;
            }
            .section {
                padding: 64px 0;
            }
        }

        @media (max-width: 767px) {
            .main-nav {
                position: fixed;
                top: 72px;
                left: 0;
                right: 0;
                flex-direction: column;
                align-items: center;
                gap: 20px;
                background: rgba(10, 14, 23, 0.97);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                padding: 36px 24px;
                border-bottom: 1px solid var(--border-light);
                display: none;
                z-index: 999;
            }

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

            .main-nav .nav-link.active::after {
                bottom: -4px;
            }

            .menu-toggle {
                display: inline-block;
            }

            .hero {
                min-height: 260px;
                padding: 110px 20px 60px;
            }

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

            .hero-inner p {
                font-size: 15px;
            }

            .section {
                padding: var(--spacing-mobile) 0;
            }

            .section-head h2 {
                font-size: 21px;
            }

            .keyword-wall .kw.lg {
                font-size: 18px;
                padding: 10px 24px;
            }

            .keyword-wall .kw.md {
                font-size: 15px;
                padding: 8px 20px;
            }

            .keyword-wall .kw.sm {
                font-size: 13px;
                padding: 5px 14px;
            }

            .wide-banner-card {
                min-height: 240px;
            }

            .wide-banner-content h2 {
                font-size: 22px;
            }

            .wide-banner-content p {
                font-size: 14px;
            }

            .pair-card {
                min-width: 100%;
            }

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

            .cta-card h2 {
                font-size: 22px;
            }

            .footer-grid {
                flex-direction: column;
                gap: 32px;
            }

            .footer-brand {
                max-width: 100%;
            }
        }

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

            .hero-inner h1 {
                font-size: 23px;
            }

            .hero-inner p {
                font-size: 14px;
                line-height: 1.7;
            }

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

            .section-head h2 {
                font-size: 19px;
                padding-left: 14px;
            }

            .keyword-wall {
                gap: 10px 12px;
            }

            .keyword-wall .kw.lg {
                font-size: 16px;
                padding: 8px 18px;
            }

            .keyword-wall .kw.md {
                font-size: 14px;
                padding: 6px 14px;
            }

            .keyword-wall .kw.sm {
                font-size: 12px;
                padding: 4px 12px;
            }

            .wide-banner-content h2 {
                font-size: 20px;
            }

            .pair-card {
                padding: 28px 20px;
            }

            .btn-primary {
                padding: 13px 32px;
                font-size: 15px;
            }

            .accordion-title {
                font-size: 15px;
            }

            .accordion-content {
                font-size: 14px;
            }
        }