/* roulang page: index */
:root {
  --primary: #00f5d4;
  --primary-glow: rgba(0, 245, 212, 0.35);
  --secondary: #7b2ff7;
  --secondary-glow: rgba(123, 47, 247, 0.35);
  --accent: #ff6b9d;
  --accent-glow: rgba(255, 107, 157, 0.3);
  --bg-dark: #0a0a1a;
  --bg-card: #12122a;
  --bg-card-hover: #1a1a3a;
  --bg-elevated: #1e1e40;
  --text-primary: #ffffff;
  --text-secondary: #c8c8e0;
  --text-muted: #8888aa;
  --border-color: #2a2a5a;
  --border-glow: rgba(0, 245, 212, 0.2);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 30px;
  --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 60px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 30px rgba(0, 245, 212, 0.15);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --container-max: 1200px;
  --header-height: 72px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--bg-dark);
  overflow-x: hidden;
}
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: #66ffe6; text-shadow: 0 0 12px var(--primary-glow); }
img { max-width: 100%; height: auto; display: block; }
button, input, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 700; color: var(--text-primary); }
h1 { font-size: clamp(2.2rem, 6vw, 4rem); }
h2 { font-size: clamp(1.8rem, 4vw, 2.8rem); }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.6rem); }
h4 { font-size: clamp(1rem, 2vw, 1.25rem); }
p { color: var(--text-secondary); margin-bottom: 1rem; }
.container { width: 100%; max-width: var(--container-max); margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-dark { background: var(--bg-dark); }
.section-card { background: var(--bg-card); }
.section-divider { border-top: 1px solid var(--border-color); }
.text-center { text-align: center; }
.text-gradient { background: linear-gradient(135deg, var(--primary), var(--secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--primary);
  background: rgba(0, 245, 212, 0.1);
  border: 1px solid rgba(0, 245, 212, 0.2);
  padding: 4px 16px;
  border-radius: 40px;
  margin-bottom: 16px;
}
.section-title { margin-bottom: 12px; }
.section-subtitle { font-size: 1.1rem; color: var(--text-muted); max-width: 640px; margin: 0 auto 48px; }

/* Header & Nav */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background: rgba(10, 10, 26, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: var(--transition);
}
.site-header.scrolled { background: rgba(10, 10, 26, 0.96); box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5); }
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}
.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 10px;
  transition: var(--transition);
}
.logo:hover { color: var(--primary); text-shadow: 0 0 20px var(--primary-glow); }
.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 900;
  color: #0a0a1a;
}
.nav-list { display: flex; align-items: center; gap: 4px; }
.nav-link {
  display: block;
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
  position: relative;
}
.nav-link:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}
.nav-link.active {
  color: var(--primary);
  background: rgba(0, 245, 212, 0.08);
  text-shadow: 0 0 10px var(--primary-glow);
}
.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  box-shadow: 0 0 12px var(--primary-glow);
}
.nav-cta {
  background: linear-gradient(135deg, var(--primary), #00c9a7);
  color: #0a0a1a !important;
  font-weight: 700;
  padding: 10px 24px;
  border-radius: 40px;
  margin-left: 8px;
  transition: var(--transition);
}
.nav-cta:hover {
  transform: scale(1.04);
  box-shadow: 0 0 30px var(--primary-glow);
  color: #0a0a1a !important;
}
.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 1.4rem;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.menu-toggle:hover { background: rgba(255,255,255,0.05); border-color: var(--primary); }

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding-top: var(--header-height);
  overflow: hidden;
  background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10,10,26,0.88) 30%, rgba(10,10,26,0.5) 70%, rgba(10,10,26,0.3));
  z-index: 1;
}
.hero::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(0,245,212,0.08) 0%, transparent 70%);
  z-index: 0;
  pointer-events: none;
}
.hero-content { position: relative; z-index: 2; max-width: 720px; padding: 60px 0 80px; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0,245,212,0.12);
  border: 1px solid rgba(0,245,212,0.25);
  padding: 6px 20px;
  border-radius: 40px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 24px;
  backdrop-filter: blur(4px);
}
.hero-badge .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--primary); box-shadow: 0 0 12px var(--primary-glow); animation: pulse-dot 2s infinite; }
@keyframes pulse-dot { 0%, 100% { opacity: 1; transform: scale(1); } 50% { opacity: 0.6; transform: scale(0.85); } }
.hero-title { font-size: clamp(2.4rem, 7vw, 4.2rem); font-weight: 900; line-height: 1.1; margin-bottom: 20px; }
.hero-title .highlight { background: linear-gradient(135deg, var(--primary), #66ffe6); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-desc { font-size: clamp(1rem, 2vw, 1.2rem); color: var(--text-secondary); max-width: 580px; margin-bottom: 36px; line-height: 1.8; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  line-height: 1.2;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), #00c9a7);
  color: #0a0a1a;
  box-shadow: 0 0 30px rgba(0,245,212,0.25);
}
.btn-primary:hover { transform: translateY(-2px) scale(1.02); box-shadow: 0 0 50px rgba(0,245,212,0.4); color: #0a0a1a; }
.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1.5px solid var(--border-color);
}
.btn-outline:hover { border-color: var(--primary); color: var(--primary); box-shadow: 0 0 25px var(--primary-glow); transform: translateY(-2px); }
.btn-lg { padding: 18px 44px; font-size: 1.1rem; }
.hero-stats { display: flex; gap: 40px; margin-top: 48px; padding-top: 32px; border-top: 1px solid rgba(255,255,255,0.06); flex-wrap: wrap; }
.hero-stat-item { }
.hero-stat-number { font-size: 1.8rem; font-weight: 800; color: var(--text-primary); }
.hero-stat-number .num-highlight { color: var(--primary); }
.hero-stat-label { font-size: 0.85rem; color: var(--text-muted); margin-top: 2px; }

/* Features Grid */
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 24px; }
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  opacity: 0;
  transition: var(--transition);
}
.feature-card:hover { transform: translateY(-6px); border-color: rgba(0,245,212,0.2); box-shadow: var(--shadow-glow); }
.feature-card:hover::before { opacity: 1; }
.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
  background: rgba(0,245,212,0.1);
  color: var(--primary);
}
.feature-card h3 { margin-bottom: 10px; }
.feature-card p { font-size: 0.95rem; color: var(--text-muted); margin-bottom: 0; }

/* Category Cards */
.category-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 28px; }
.category-card {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  transition: var(--transition);
  display: block;
  color: var(--text-primary);
}
.category-card:hover { transform: translateY(-6px); border-color: rgba(0,245,212,0.25); box-shadow: var(--shadow-glow); color: var(--text-primary); }
.category-card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: var(--transition);
}
.category-card:hover .category-card-img { transform: scale(1.04); }
.category-card-body { padding: 24px; }
.category-card-body h3 { margin-bottom: 8px; }
.category-card-body p { font-size: 0.95rem; color: var(--text-muted); margin-bottom: 16px; }
.category-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 40px;
  background: rgba(123, 47, 247, 0.15);
  color: var(--secondary);
  border: 1px solid rgba(123, 47, 247, 0.2);
}

/* Features Showcase */
.showcase-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 28px; }
.showcase-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}
.showcase-card:hover { transform: translateY(-4px); border-color: rgba(0,245,212,0.2); box-shadow: var(--shadow-glow); }
.showcase-img { width: 100%; height: 180px; object-fit: cover; }
.showcase-body { padding: 24px; }
.showcase-body h4 { margin-bottom: 8px; }
.showcase-body p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 0; }
.showcase-meta { display: flex; align-items: center; gap: 12px; margin-top: 14px; font-size: 0.82rem; color: var(--text-muted); }
.showcase-meta .badge {
  display: inline-block;
  padding: 2px 12px;
  border-radius: 40px;
  font-size: 0.72rem;
  font-weight: 600;
  background: rgba(0,245,212,0.1);
  color: var(--primary);
  border: 1px solid rgba(0,245,212,0.15);
}

/* News / CMS List */
.news-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 24px; }
.news-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: var(--transition);
  display: block;
  color: var(--text-primary);
}
.news-card:hover { transform: translateY(-4px); border-color: rgba(0,245,212,0.2); box-shadow: var(--shadow-glow); color: var(--text-primary); }
.news-card .news-cat {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 3px 14px;
  border-radius: 40px;
  background: rgba(123,47,247,0.12);
  color: var(--secondary);
  border: 1px solid rgba(123,47,247,0.15);
  margin-bottom: 12px;
}
.news-card h4 { margin-bottom: 8px; font-size: 1.1rem; }
.news-card p { font-size: 0.92rem; color: var(--text-muted); margin-bottom: 16px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-card .news-time { font-size: 0.8rem; color: var(--text-muted); display: flex; align-items: center; gap: 6px; }
.news-empty {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px dashed var(--border-color);
}

/* Stats Section */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 24px; }
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  text-align: center;
  transition: var(--transition);
}
.stat-card:hover { border-color: rgba(0,245,212,0.2); box-shadow: var(--shadow-glow); transform: translateY(-3px); }
.stat-number { font-size: 2.4rem; font-weight: 900; background: linear-gradient(135deg, var(--primary), var(--secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.stat-label { font-size: 0.9rem; color: var(--text-muted); margin-top: 6px; }

/* FAQ */
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: rgba(0,245,212,0.15); }
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  background: transparent;
  color: var(--text-primary);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  transition: var(--transition);
  gap: 16px;
}
.faq-question:hover { color: var(--primary); }
.faq-question .faq-icon { font-size: 1.2rem; transition: var(--transition); color: var(--primary); flex-shrink: 0; }
.faq-item.open .faq-question .faq-icon { transform: rotate(45deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  padding: 0 24px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
}
.faq-item.open .faq-answer { max-height: 300px; padding: 0 24px 20px; }

/* CTA */
.cta-section {
  background: linear-gradient(135deg, rgba(0,245,212,0.06), rgba(123,47,247,0.06));
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}
.cta-box {
  background: var(--bg-card);
  border: 1px solid rgba(0,245,212,0.15);
  border-radius: var(--radius-lg);
  padding: 60px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-glow);
}
.cta-box::before {
  content: '';
  position: absolute;
  top: -60%;
  left: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(0,245,212,0.06) 0%, transparent 60%);
  pointer-events: none;
}
.cta-box h2 { margin-bottom: 16px; }
.cta-box p { color: var(--text-muted); max-width: 560px; margin: 0 auto 32px; font-size: 1.05rem; }

/* Footer */
.site-footer {
  background: #08081a;
  border-top: 1px solid var(--border-color);
  padding: 60px 0 30px;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand .logo { font-size: 1.3rem; margin-bottom: 16px; }
.footer-brand p { font-size: 0.9rem; color: var(--text-muted); max-width: 320px; }
.footer-col h5 { font-size: 0.9rem; font-weight: 600; color: var(--text-primary); margin-bottom: 16px; letter-spacing: 0.04em; }
.footer-col a {
  display: block;
  font-size: 0.88rem;
  color: var(--text-muted);
  padding: 4px 0;
  transition: var(--transition);
}
.footer-col a:hover { color: var(--primary); padding-left: 4px; }
.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.footer-bottom a { color: var(--text-muted); }
.footer-bottom a:hover { color: var(--primary); }

/* Responsive */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .cta-box { padding: 40px 28px; }
}
@media (max-width: 768px) {
  .menu-toggle { display: flex; }
  .nav-list {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background: rgba(10,10,26,0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 16px 24px 24px;
    gap: 2px;
    border-bottom: 1px solid var(--border-color);
    transform: translateY(-110%);
    opacity: 0;
    transition: var(--transition);
    pointer-events: none;
  }
  .nav-list.open { transform: translateY(0); opacity: 1; pointer-events: all; }
  .nav-link { padding: 12px 16px; width: 100%; border-radius: var(--radius-sm); }
  .nav-cta { margin-left: 0; margin-top: 8px; text-align: center; }
  .hero { min-height: 90vh; }
  .hero-content { padding: 40px 0 60px; }
  .hero-stats { gap: 24px; }
  .hero-stat-number { font-size: 1.4rem; }
  .section { padding: 56px 0; }
  .features-grid { grid-template-columns: 1fr; }
  .category-grid { grid-template-columns: 1fr; }
  .showcase-grid { grid-template-columns: 1fr; }
  .news-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .cta-box { padding: 32px 20px; }
  .cta-box .btn-lg { width: 100%; justify-content: center; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .hero-title { font-size: 1.8rem; }
  .hero-actions { flex-direction: column; width: 100%; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .stat-card { padding: 20px 12px; }
  .stat-number { font-size: 1.6rem; }
  .section { padding: 40px 0; }
  .faq-question { padding: 16px 18px; font-size: 0.95rem; }
  .faq-answer { padding: 0 18px; font-size: 0.9rem; }
  .faq-item.open .faq-answer { padding: 0 18px 16px; }
  .news-card { padding: 20px; }
  .feature-card { padding: 24px 20px; }
  .category-card-body { padding: 18px; }
  .showcase-body { padding: 18px; }
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #ff6b35;
            --primary-dark: #e55a2b;
            --primary-glow: rgba(255, 107, 53, 0.4);
            --primary-light: rgba(255, 107, 53, 0.12);
            --secondary: #7c3aed;
            --secondary-glow: rgba(124, 58, 237, 0.3);
            --accent: #f59e0b;
            --bg-dark: #0d0d1a;
            --bg-card: #14142a;
            --bg-card-hover: #1c1c3a;
            --bg-section: #0a0a16;
            --bg-input: rgba(255, 255, 255, 0.06);
            --text-primary: #f1f5f9;
            --text-secondary: #94a3b8;
            --text-muted: #64748b;
            --border-color: rgba(255, 255, 255, 0.08);
            --border-glow: rgba(255, 107, 53, 0.2);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 30px rgba(255, 107, 53, 0.15);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --container: 1200px;
            --header-h: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-dark);
            min-height: 100vh;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
            background: none;
            color: inherit;
        }
        button {
            cursor: pointer;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-primary);
        }
        ::selection {
            background: var(--primary);
            color: #fff;
        }
        :focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

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

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-h);
            background: rgba(13, 13, 26, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .site-header.scrolled {
            background: rgba(13, 13, 26, 0.98);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-h);
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.5px;
        }
        .logo .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: var(--radius-sm);
            font-size: 18px;
            font-weight: 900;
            color: #fff;
            box-shadow: 0 0 20px var(--primary-glow);
        }
        .logo:hover {
            color: var(--primary);
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-list .nav-link {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            position: relative;
        }
        .nav-list .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: var(--transition);
            box-shadow: 0 0 12px var(--primary-glow);
        }
        .nav-list .nav-link:hover {
            color: var(--text-primary);
        }
        .nav-list .nav-link:hover::after {
            width: 60%;
        }
        .nav-list .nav-link.active {
            color: var(--primary);
        }
        .nav-list .nav-link.active::after {
            width: 70%;
            background: var(--primary);
            box-shadow: 0 0 16 px var(--primary-glow);
        }
        .nav-list .nav-link.nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            padding: 10px 24px;
            border-radius: var(--radius-md);
            font-weight: 600;
            box-shadow: 0 4px 20px var(--primary-glow);
        }
        .nav-list .nav-link.nav-cta::after {
            display: none;
        }
        .nav-list .nav-link.nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px var(--primary-glow);
        }
        .mobile-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 6px;
            background: none;
            border: none;
            cursor: pointer;
        }
        .mobile-toggle span {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: var(--transition);
        }
        .mobile-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .mobile-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .mobile-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ===== Hero / Banner ===== */
        .category-hero {
            padding: 140px 0 80px;
            background: linear-gradient(135deg, #0d0d1a 0%, #1a0a2e 50%, #0d0d1a 100%);
            position: relative;
            overflow: hidden;
            min-height: 360px;
            display: flex;
            align-items: center;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.15;
            z-index: 0;
        }
        .category-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(13, 13, 26, 0.85) 0%, rgba(26, 10, 46, 0.7) 100%);
            z-index: 1;
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
        }
        .category-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 18px;
            background: var(--primary-light);
            border: 1px solid var(--border-glow);
            border-radius: 50px;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 20px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .category-hero .hero-badge i {
            font-size: 14px;
        }
        .category-hero h1 {
            font-size: 48px;
            font-weight: 900;
            line-height: 1.15;
            margin-bottom: 16px;
            background: linear-gradient(135deg, #fff 40%, var(--primary) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .category-hero p {
            font-size: 18px;
            color: var(--text-secondary);
            max-width: 640px;
            line-height: 1.8;
        }
        .category-hero .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 30px;
            flex-wrap: wrap;
        }
        .category-hero .hero-stats .stat-item {
            text-align: left;
        }
        .category-hero .hero-stats .stat-num {
            font-size: 32px;
            font-weight: 800;
            color: var(--text-primary);
            line-height: 1.2;
        }
        .category-hero .hero-stats .stat-num span {
            color: var(--primary);
        }
        .category-hero .hero-stats .stat-label {
            font-size: 14px;
            color: var(--text-muted);
        }

        /* ===== Section通用 ===== */
        .section {
            padding: 80px 0;
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            font-size: 34px;
            font-weight: 800;
            margin-bottom: 12px;
        }
        .section-header p {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto;
        }
        .section-header .section-line {
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 4px;
            margin: 16px auto 0;
            box-shadow: 0 0 20px var(--primary-glow);
        }
        .section-bg-alt {
            background: var(--bg-section);
        }

        /* ===== 分类筛选Tabs ===== */
        .filter-tabs {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            margin-bottom: 40px;
        }
        .filter-tabs .tab-btn {
            padding: 10px 24px;
            border-radius: 50px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-secondary);
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            cursor: pointer;
        }
        .filter-tabs .tab-btn:hover {
            color: var(--text-primary);
            border-color: var(--primary);
            background: var(--primary-light);
        }
        .filter-tabs .tab-btn.active {
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border-color: transparent;
            box-shadow: 0 4px 20px var(--primary-glow);
        }

        /* ===== 卡片网格 ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .card-guide {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .card-guide:hover {
            transform: translateY(-6px);
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow), var(--shadow-md);
            background: var(--bg-card-hover);
        }
        .card-guide .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 0;
            display: block;
        }
        .card-guide .card-body {
            padding: 24px 22px 26px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card-guide .card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 12px;
        }
        .card-guide .card-tags .tag {
            padding: 4px 12px;
            border-radius: 50px;
            font-size: 12px;
            font-weight: 600;
            background: var(--primary-light);
            color: var(--primary);
            border: 1px solid var(--border-glow);
        }
        .card-guide .card-tags .tag.tag-secondary {
            background: rgba(124, 58, 237, 0.12);
            color: var(--secondary);
            border-color: rgba(124, 58, 237, 0.2);
        }
        .card-guide .card-tags .tag.tag-accent {
            background: rgba(245, 158, 11, 0.12);
            color: var(--accent);
            border-color: rgba(245, 158, 11, 0.2);
        }
        .card-guide h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
            line-height: 1.35;
        }
        .card-guide h3 a {
            color: var(--text-primary);
        }
        .card-guide h3 a:hover {
            color: var(--primary);
        }
        .card-guide .card-excerpt {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
        }
        .card-guide .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 14px;
            border-top: 1px solid var(--border-color);
            font-size: 13px;
            color: var(--text-muted);
        }
        .card-guide .card-meta .meta-left {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .card-guide .card-meta .meta-left i {
            margin-right: 4px;
        }
        .card-guide .card-meta .read-more {
            color: var(--primary);
            font-weight: 600;
            font-size: 13px;
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .card-guide .card-meta .read-more:hover {
            gap: 8px;
        }

        /* ===== 图文区块 ===== */
        .feature-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }
        .feature-block .feature-img {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border-color);
        }
        .feature-block .feature-img img {
            width: 100%;
            height: 380px;
            object-fit: cover;
            border-radius: 0;
        }
        .feature-block .feature-content h2 {
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 16px;
        }
        .feature-block .feature-content p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 20px;
        }
        .feature-block .feature-content .feature-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .feature-block .feature-content .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            font-size: 15px;
            color: var(--text-secondary);
        }
        .feature-block .feature-content .feature-list li i {
            color: var(--primary);
            font-size: 18px;
            margin-top: 2px;
            flex-shrink: 0;
        }

        /* ===== 排行榜/列表 ===== */
        .rank-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .rank-item {
            display: flex;
            align-items: center;
            gap: 18px;
            padding: 18px 22px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .rank-item:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-glow);
            transform: translateX(4px);
        }
        .rank-item .rank-num {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            font-size: 16px;
            font-weight: 800;
            color: var(--text-muted);
            background: rgba(255, 255, 255, 0.04);
            flex-shrink: 0;
        }
        .rank-item .rank-num.top {
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            box-shadow: 0 0 16px var(--primary-glow);
        }
        .rank-item .rank-info {
            flex: 1;
        }
        .rank-item .rank-info h4 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 4px;
        }
        .rank-item .rank-info p {
            font-size: 13px;
            color: var(--text-muted);
        }
        .rank-item .rank-badge {
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 12px;
            font-weight: 600;
            background: var(--primary-light);
            color: var(--primary);
            flex-shrink: 0;
        }

        /* ===== FAQ ===== */
        .faq-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 24px 26px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-sm);
        }
        .faq-item .faq-q {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .faq-item .faq-q::before {
            content: 'Q';
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 800;
            flex-shrink: 0;
        }
        .faq-item .faq-a {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            padding-left: 38px;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, #1a0a2e 0%, #0d0d1a 100%);
            position: relative;
            overflow: hidden;
            text-align: center;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.08;
            z-index: 0;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            font-size: 36px;
            font-weight: 900;
            margin-bottom: 16px;
        }
        .cta-section p {
            font-size: 18px;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto 32px;
        }
        .cta-section .cta-btns {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .cta-section .btn-primary {
            padding: 16px 40px;
            border-radius: var(--radius-md);
            font-size: 17px;
            font-weight: 700;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            box-shadow: 0 6px 30px var(--primary-glow);
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .cta-section .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px var(--primary-glow);
        }
        .cta-section .btn-secondary {
            padding: 16px 40px;
            border-radius: var(--radius-md);
            font-size: 17px;
            font-weight: 700;
            background: transparent;
            color: var(--text-primary);
            border: 2px solid var(--border-color);
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .cta-section .btn-secondary:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #080812;
            border-top: 1px solid var(--border-color);
            padding: 60px 0 30px;
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .site-footer .footer-brand .logo {
            margin-bottom: 16px;
        }
        .site-footer .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.8;
            max-width: 340px;
        }
        .site-footer .footer-col h5 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 18px;
            letter-spacing: 0.3px;
        }
        .site-footer .footer-col a {
            display: block;
            font-size: 14px;
            color: var(--text-muted);
            padding: 5px 0;
            transition: var(--transition);
        }
        .site-footer .footer-col a:hover {
            color: var(--primary);
            padding-left: 4px;
        }
        .site-footer .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
            font-size: 13px;
            color: var(--text-muted);
            flex-wrap: wrap;
            gap: 12px;
        }
        .site-footer .footer-bottom a {
            color: var(--text-muted);
        }
        .site-footer .footer-bottom a:hover {
            color: var(--primary);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .feature-block {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .feature-block .feature-img img {
                height: 280px;
            }
            .faq-grid {
                grid-template-columns: 1fr;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .category-hero h1 {
                font-size: 38px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-h: 64px;
            }
            .nav-list {
                display: none;
                position: absolute;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: rgba(13, 13, 26, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 16px 24px 24px;
                border-bottom: 1px solid var(--border-color);
                gap: 4px;
                box-shadow: var(--shadow-lg);
            }
            .nav-list.open {
                display: flex;
            }
            .nav-list .nav-link {
                padding: 12px 16px;
                width: 100%;
                border-radius: var(--radius-sm);
            }
            .nav-list .nav-link.nav-cta {
                margin-top: 8px;
                text-align: center;
            }
            .mobile-toggle {
                display: flex;
            }
            .category-hero {
                padding: 110px 0 60px;
                min-height: auto;
            }
            .category-hero h1 {
                font-size: 30px;
            }
            .category-hero p {
                font-size: 16px;
            }
            .category-hero .hero-stats {
                gap: 24px;
            }
            .category-hero .hero-stats .stat-num {
                font-size: 26px;
            }
            .section {
                padding: 56px 0;
            }
            .section-header h2 {
                font-size: 26px;
            }
            .card-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .card-guide .card-img {
                height: 180px;
            }
            .feature-block .feature-img img {
                height: 220px;
            }
            .faq-grid {
                grid-template-columns: 1fr;
            }
            .faq-item {
                padding: 18px 20px;
            }
            .cta-section h2 {
                font-size: 28px;
            }
            .cta-section .btn-primary,
            .cta-section .btn-secondary {
                padding: 14px 28px;
                font-size: 15px;
                width: 100%;
                justify-content: center;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .filter-tabs {
                flex-wrap: nowrap;
                overflow-x: auto;
                padding-bottom: 8px;
                justify-content: flex-start;
                -webkit-overflow-scrolling: touch;
            }
            .filter-tabs .tab-btn {
                white-space: nowrap;
                flex-shrink: 0;
            }
            .rank-item {
                padding: 14px 16px;
                flex-wrap: wrap;
            }
            .rank-item .rank-badge {
                margin-left: auto;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .category-hero h1 {
                font-size: 26px;
            }
            .category-hero .hero-stats .stat-num {
                font-size: 22px;
            }
            .section-header h2 {
                font-size: 22px;
            }
            .card-guide h3 {
                font-size: 18px;
            }
            .card-guide .card-body {
                padding: 18px 16px 20px;
            }
            .feature-block .feature-content h2 {
                font-size: 24px;
            }
            .cta-section h2 {
                font-size: 24px;
            }
            .cta-section p {
                font-size: 15px;
            }
            .rank-item .rank-info h4 {
                font-size: 15px;
            }
            .logo {
                font-size: 18px;
            }
            .logo .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 15px;
            }
        }

/* roulang page: category2 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #00f5ff;
            --primary-dark: #00c4cc;
            --primary-glow: rgba(0, 245, 255, 0.25);
            --secondary: #ff6bcb;
            --secondary-glow: rgba(255, 107, 203, 0.2);
            --accent: #ffd700;
            --bg-dark: #0a0e1a;
            --bg-card: #111827;
            --bg-elevated: #1a2236;
            --bg-input: #0d1321;
            --text-primary: #f0f4ff;
            --text-secondary: #94a3b8;
            --text-muted: #64748b;
            --border-color: #1e293b;
            --border-glow: rgba(0, 245, 255, 0.15);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 30px rgba(0, 245, 255, 0.08);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-dark);
            min-height: 100vh;
            overflow-x: hidden;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
            color: inherit;
        }
        button {
            cursor: pointer;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-primary);
        }
        h1 {
            font-size: clamp(2rem, 5vw, 3.5rem);
        }
        h2 {
            font-size: clamp(1.5rem, 3.5vw, 2.5rem);
        }
        h3 {
            font-size: clamp(1.2rem, 2.5vw, 1.75rem);
        }
        h4 {
            font-size: 1.25rem;
        }
        h5 {
            font-size: 1.05rem;
        }
        p {
            color: var(--text-secondary);
            margin-bottom: 1rem;
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 霓虹装饰线 ===== */
        .neon-line {
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 2px;
            margin: 16px 0 24px;
            box-shadow: 0 0 20px var(--primary-glow);
        }
        .neon-line.center {
            margin: 16px auto 24px;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(10, 14, 26, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
            transition: background var(--transition), border-color var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.5px;
            transition: opacity var(--transition);
        }
        .logo:hover {
            opacity: 0.9;
            color: var(--text-primary);
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: var(--radius-sm);
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--bg-dark);
            box-shadow: 0 0 20px var(--primary-glow);
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-link {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
            position: relative;
            letter-spacing: 0.3px;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 1px;
            transition: width var(--transition);
            box-shadow: 0 0 12px var(--primary-glow);
        }
        .nav-link:hover {
            color: var(--text-primary);
            background: rgba(0, 245, 255, 0.06);
        }
        .nav-link:hover::after {
            width: 60%;
        }
        .nav-link.active {
            color: var(--primary);
            background: rgba(0, 245, 255, 0.08);
        }
        .nav-link.active::after {
            width: 70%;
            background: var(--primary);
            box-shadow: 0 0 20px var(--primary-glow);
        }
        .nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: var(--bg-dark) !important;
            font-weight: 700;
            padding: 10px 26px;
            border-radius: var(--radius-sm);
            box-shadow: 0 0 25px var(--primary-glow);
            transition: all var(--transition);
            letter-spacing: 0.5px;
        }
        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 40px var(--primary-glow), 0 8px 25px rgba(0, 245, 255, 0.15);
            background: linear-gradient(135deg, var(--primary-dark), var(--secondary));
            color: var(--bg-dark) !important;
        }
        .nav-cta::after {
            display: none;
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            cursor: pointer;
            background: none;
            border: none;
        }
        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: all var(--transition);
        }
        .nav-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ===== Hero / Banner ===== */
        .page-hero {
            padding: calc(var(--header-height) + 60px) 0 80px;
            background: linear-gradient(135deg, #0a0e1a 0%, #111827 50%, #0d1321 100%);
            position: relative;
            overflow: hidden;
            min-height: 420px;
            display: flex;
            align-items: center;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.12;
            z-index: 0;
            mask-image: radial-gradient(ellipse at 30% 50%, black 30%, transparent 70%);
            -webkit-mask-image: radial-gradient(ellipse at 30% 50%, black 30%, transparent 70%);
        }
        .page-hero::after {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(0, 245, 255, 0.06), transparent 70%);
            border-radius: 50%;
            z-index: 0;
            pointer-events: none;
        }
        .page-hero .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }
        .page-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 18px;
            background: rgba(0, 245, 255, 0.1);
            border: 1px solid rgba(0, 245, 255, 0.2);
            border-radius: 50px;
            font-size: 0.85rem;
            color: var(--primary);
            margin-bottom: 20px;
            letter-spacing: 0.5px;
        }
        .page-hero .hero-badge i {
            font-size: 0.75rem;
        }
        .page-hero h1 {
            font-size: clamp(2.2rem, 5vw, 3.8rem);
            font-weight: 800;
            background: linear-gradient(135deg, var(--text-primary) 30%, var(--primary) 70%, var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 16px;
            letter-spacing: -1px;
        }
        .page-hero p {
            font-size: 1.15rem;
            color: var(--text-secondary);
            max-width: 680px;
            margin: 0 auto 32px;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
            letter-spacing: 0.3px;
            border: 1px solid transparent;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: var(--bg-dark);
            box-shadow: 0 0 30px var(--primary-glow);
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 0 50px var(--primary-glow), 0 12px 35px rgba(0, 245, 255, 0.15);
            color: var(--bg-dark);
        }
        .btn-outline {
            background: transparent;
            border-color: var(--border-color);
            color: var(--text-primary);
        }
        .btn-outline:hover {
            border-color: var(--primary);
            background: rgba(0, 245, 255, 0.06);
            color: var(--primary);
            transform: translateY(-3px);
        }
        .btn-glow {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(0, 245, 255, 0.06);
            box-shadow: 0 0 20px var(--primary-glow);
        }
        .btn-glow:hover {
            background: rgba(0, 245, 255, 0.12);
            color: var(--primary);
            transform: translateY(-3px);
            box-shadow: 0 0 40px var(--primary-glow);
        }
        .btn-sm {
            padding: 10px 20px;
            font-size: 0.85rem;
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 80px 0;
            position: relative;
        }
        .section-alt {
            background: var(--bg-card);
        }
        .section-divider {
            border: none;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--border-color), transparent);
            margin: 0;
        }
        .section-header {
            text-align: center;
            margin-bottom: 52px;
        }
        .section-header h2 {
            margin-bottom: 12px;
        }
        .section-header p {
            font-size: 1.05rem;
            max-width: 600px;
            margin: 0 auto;
            color: var(--text-muted);
        }

        /* ===== 安全核心卡片 ===== */
        .security-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .security-card {
            background: var(--bg-elevated);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 36px 28px;
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }
        .security-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            opacity: 0;
            transition: opacity var(--transition);
        }
        .security-card:hover {
            border-color: rgba(0, 245, 255, 0.25);
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg), var(--shadow-glow);
        }
        .security-card:hover::before {
            opacity: 1;
        }
        .security-card .icon-wrap {
            width: 52px;
            height: 52px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            background: rgba(0, 245, 255, 0.08);
            color: var(--primary);
            font-size: 1.5rem;
            margin-bottom: 20px;
            transition: all var(--transition);
        }
        .security-card:hover .icon-wrap {
            background: rgba(0, 245, 255, 0.15);
            box-shadow: 0 0 25px var(--primary-glow);
        }
        .security-card h3 {
            font-size: 1.2rem;
            margin-bottom: 10px;
        }
        .security-card p {
            font-size: 0.92rem;
            color: var(--text-muted);
            margin-bottom: 0;
            line-height: 1.7;
        }

        /* ===== 安全攻略列表 ===== */
        .guide-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .guide-item {
            display: flex;
            gap: 20px;
            padding: 24px;
            background: var(--bg-elevated);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            transition: all var(--transition);
            align-items: flex-start;
        }
        .guide-item:hover {
            border-color: rgba(0, 245, 255, 0.2);
            transform: translateY(-3px);
            box-shadow: var(--shadow-md), var(--shadow-glow);
        }
        .guide-item .num {
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            background: rgba(0, 245, 255, 0.08);
            color: var(--primary);
            font-weight: 700;
            font-size: 1.1rem;
            transition: all var(--transition);
        }
        .guide-item:hover .num {
            background: rgba(0, 245, 255, 0.15);
            box-shadow: 0 0 20px var(--primary-glow);
        }
        .guide-item .content {
            flex: 1;
        }
        .guide-item .content h4 {
            font-size: 1.05rem;
            margin-bottom: 6px;
            color: var(--text-primary);
        }
        .guide-item .content p {
            font-size: 0.88rem;
            color: var(--text-muted);
            margin-bottom: 0;
            line-height: 1.6;
        }
        .guide-item .tag {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 500;
            background: rgba(0, 245, 255, 0.08);
            color: var(--primary);
            margin-top: 8px;
        }
        .guide-item .tag.warning {
            background: rgba(255, 107, 203, 0.1);
            color: var(--secondary);
        }

        /* ===== 数据统计 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }
        .stat-card {
            padding: 32px 20px;
            background: var(--bg-elevated);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            transition: all var(--transition);
        }
        .stat-card:hover {
            border-color: rgba(0, 245, 255, 0.2);
            transform: translateY(-4px);
            box-shadow: var(--shadow-md), var(--shadow-glow);
        }
        .stat-card .num {
            font-size: 2.4rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }
        .stat-card .label {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 8px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-elevated);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(0, 245, 255, 0.15);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            transition: color var(--transition);
            gap: 16px;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question i {
            font-size: 0.85rem;
            color: var(--text-muted);
            transition: transform var(--transition), color var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, rgba(0, 245, 255, 0.04), rgba(255, 107, 203, 0.04));
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
            text-align: center;
        }
        .cta-section h2 {
            margin-bottom: 16px;
        }
        .cta-section p {
            max-width: 560px;
            margin: 0 auto 32px;
            font-size: 1.05rem;
        }
        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-card);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            font-size: 1.3rem;
            margin-bottom: 16px;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 360px;
        }
        .footer-col h5 {
            font-size: 0.95rem;
            color: var(--text-primary);
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .footer-col a {
            display: block;
            font-size: 0.88rem;
            color: var(--text-muted);
            padding: 5px 0;
            transition: color var(--transition), padding-left var(--transition);
        }
        .footer-col a:hover {
            color: var(--primary);
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--text-muted);
        }
        .footer-bottom a:hover {
            color: var(--primary);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .security-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
        }
        @media (max-width: 768px) {
            :root {
                --header-height: 64px;
            }
            .nav-list {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(10, 14, 26, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px 24px;
                gap: 6px;
                border-bottom: 1px solid var(--border-color);
                transform: translateY(-120%);
                opacity: 0;
                transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
                pointer-events: none;
            }
            .nav-list.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: all;
            }
            .nav-link {
                width: 100%;
                padding: 12px 16px;
                font-size: 1rem;
            }
            .nav-cta {
                text-align: center;
                margin-top: 8px;
            }
            .nav-toggle {
                display: flex;
            }
            .page-hero {
                padding: calc(var(--header-height) + 40px) 0 60px;
                min-height: auto;
            }
            .page-hero h1 {
                font-size: 2rem;
            }
            .page-hero p {
                font-size: 1rem;
            }
            .section {
                padding: 56px 0;
            }
            .section-header {
                margin-bottom: 36px;
            }
            .security-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .guide-list {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .guide-item {
                padding: 20px;
                flex-direction: column;
                gap: 12px;
            }
            .guide-item .num {
                width: 32px;
                height: 32px;
                font-size: 0.95rem;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-card {
                padding: 24px 16px;
            }
            .stat-card .num {
                font-size: 1.8rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 8px;
                text-align: center;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .cta-actions {
                flex-direction: column;
                align-items: center;
            }
            .faq-question {
                padding: 16px 18px;
                font-size: 0.92rem;
            }
            .faq-answer {
                font-size: 0.88rem;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .page-hero h1 {
                font-size: 1.7rem;
            }
            .btn {
                padding: 12px 24px;
                font-size: 0.88rem;
            }
            .security-card {
                padding: 24px 20px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-card .num {
                font-size: 1.5rem;
            }
        }

        /* ===== 动画 ===== */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .fade-in {
            animation: fadeInUp 0.6s ease forwards;
        }
        .fade-in-delay-1 {
            animation-delay: 0.1s;
        }
        .fade-in-delay-2 {
            animation-delay: 0.2s;
        }
        .fade-in-delay-3 {
            animation-delay: 0.3s;
        }

/* roulang page: article */
:root {
  --primary: #ff6a00;
  --primary-dark: #e55d00;
  --primary-glow: rgba(255, 106, 0, 0.4);
  --secondary: #9b59b6;
  --accent: #f1c40f;
  --bg-dark: #0a0a1a;
  --bg-card: #12122a;
  --bg-card-hover: #1a1a3a;
  --bg-section: #0e0e24;
  --text-light: #f0f0f0;
  --text-muted: #a0a0c0;
  --text-dim: #6a6a8a;
  --border-color: #2a2a4a;
  --border-glow: rgba(255, 106, 0, 0.2);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 30px rgba(255, 106, 0, 0.15);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --container: 1140px;
  --header-h: 76px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-main);
  background: var(--bg-dark);
  color: var(--text-light);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; transition: var(--transition); }
img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
button { cursor: pointer; font-family: inherit; border: none; background: none; color: inherit; }
input, textarea { font-family: inherit; outline: none; border: none; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; }

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

/* ===== Header / Nav ===== */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(10, 10, 26, 0.92);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255, 106, 0, 0.12);
  height: var(--header-h);
  display: flex; align-items: center;
  box-shadow: 0 2px 40px rgba(0, 0, 0, 0.5);
}

.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px;
  height: 100%;
}

.logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 24px; font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
}

.logo-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff; font-size: 20px; font-weight: 800;
  -webkit-text-fill-color: #fff;
  box-shadow: 0 0 20px rgba(255, 106, 0, 0.3);
}

.nav-list { display: flex; align-items: center; gap: 6px; }

.nav-link {
  padding: 8px 18px; border-radius: var(--radius-sm);
  font-size: 15px; font-weight: 500; color: var(--text-muted);
  transition: var(--transition); position: relative;
  white-space: nowrap;
}

.nav-link:hover { color: var(--text-light); background: rgba(255, 255, 255, 0.05); }

.nav-link.active {
  color: var(--primary); background: rgba(255, 106, 0, 0.1);
  box-shadow: inset 0 -2px 0 var(--primary);
}

.nav-link.active::after {
  content: ''; position: absolute; bottom: -2px; left: 50%; transform: translateX(-50%);
  width: 60%; height: 2px; background: var(--primary);
  box-shadow: 0 0 12px var(--primary-glow); border-radius: 2px;
}

.nav-cta {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff !important; font-weight: 600; padding: 8px 24px;
  border-radius: 50px; box-shadow: 0 4px 20px rgba(255, 106, 0, 0.3);
}
.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(255, 106, 0, 0.4); background: linear-gradient(135deg, var(--primary-dark), var(--primary)); }

.nav-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 6px; background: none; border: none; }
.nav-toggle span { display: block; width: 26px; height: 2.5px; background: var(--text-light); border-radius: 4px; transition: var(--transition); }

/* ===== Hero / Banner ===== */
.page-banner {
  margin-top: var(--header-h);
  padding: 80px 0 60px;
  background: linear-gradient(135deg, rgba(10,10,26,0.95), rgba(18,18,42,0.9)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  border-bottom: 1px solid rgba(255, 106, 0, 0.08);
  position: relative;
}
.page-banner::after {
  content: ''; position: absolute; bottom: 0; left: 0; right: 0;
  height: 80px; background: linear-gradient(to top, var(--bg-dark), transparent);
}
.banner-content { position: relative; z-index: 2; }
.banner-category {
  display: inline-block; padding: 4px 16px; border-radius: 50px;
  background: rgba(255, 106, 0, 0.15); color: var(--primary);
  font-size: 13px; font-weight: 600; letter-spacing: 1px;
  border: 1px solid rgba(255, 106, 0, 0.2);
  margin-bottom: 16px;
}
.banner-title { font-size: 40px; font-weight: 800; margin-bottom: 16px; line-height: 1.2; background: linear-gradient(135deg, #fff, var(--text-muted)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.banner-meta { display: flex; flex-wrap: wrap; gap: 20px; color: var(--text-muted); font-size: 14px; }
.banner-meta i { color: var(--primary); margin-right: 6px; }

/* ===== Main Article ===== */
.article-main { padding: 60px 0 80px; }
.article-grid { display: grid; grid-template-columns: 1fr 320px; gap: 48px; }

.article-body {
  background: var(--bg-card); border-radius: var(--radius-lg);
  padding: 40px 44px; border: 1px solid var(--border-color);
  box-shadow: var(--shadow);
}

.article-body h2 { font-size: 26px; margin-top: 40px; margin-bottom: 16px; color: var(--primary); }
.article-body h3 { font-size: 20px; margin-top: 32px; margin-bottom: 12px; color: var(--text-light); }
.article-body p { margin-bottom: 20px; color: var(--text-muted); font-size: 16px; line-height: 1.8; }
.article-body ul, .article-body ol { margin-bottom: 20px; padding-left: 24px; color: var(--text-muted); }
.article-body li { margin-bottom: 8px; position: relative; }
.article-body ul li::before { content: '▸'; color: var(--primary); position: absolute; left: -18px; }
.article-body img { border-radius: var(--radius); margin: 24px 0; box-shadow: var(--shadow); }
.article-body blockquote {
  border-left: 4px solid var(--primary); padding: 16px 24px; margin: 24px 0;
  background: rgba(255, 106, 0, 0.05); border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-muted); font-style: italic;
}
.article-body a { color: var(--primary); border-bottom: 1px solid transparent; }
.article-body a:hover { border-bottom-color: var(--primary); }

/* Sidebar */
.article-sidebar { display: flex; flex-direction: column; gap: 32px; }

.sidebar-card {
  background: var(--bg-card); border-radius: var(--radius);
  padding: 28px; border: 1px solid var(--border-color);
  box-shadow: var(--shadow);
}
.sidebar-card h4 { font-size: 18px; margin-bottom: 20px; color: var(--text-light); display: flex; align-items: center; gap: 10px; }
.sidebar-card h4 i { color: var(--primary); }

.sidebar-list { display: flex; flex-direction: column; gap: 12px; }
.sidebar-item {
  display: flex; gap: 14px; align-items: flex-start;
  padding: 12px; border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.03); transition: var(--transition);
  cursor: pointer;
}
.sidebar-item:hover { background: rgba(255, 106, 0, 0.08); transform: translateX(4px); }
.sidebar-item img { width: 60px; height: 60px; border-radius: var(--radius-sm); object-fit: cover; flex-shrink: 0; }
.sidebar-item-text { flex: 1; }
.sidebar-item-text h5 { font-size: 14px; font-weight: 600; color: var(--text-light); margin-bottom: 4px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.sidebar-item-text span { font-size: 12px; color: var(--text-dim); }

.sidebar-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  display: inline-block; padding: 4px 14px; border-radius: 50px;
  background: rgba(255, 106, 0, 0.08); color: var(--text-muted);
  font-size: 13px; border: 1px solid rgba(255, 106, 0, 0.1);
  transition: var(--transition);
}
.tag:hover { background: rgba(255, 106, 0, 0.2); color: var(--primary); border-color: var(--primary); }

.sidebar-cta {
  background: linear-gradient(135deg, rgba(255,106,0,0.12), rgba(155,89,182,0.12));
  border: 1px solid rgba(255, 106, 0, 0.2);
  text-align: center;
}
.sidebar-cta h4 { justify-content: center; }
.sidebar-cta p { font-size: 14px; color: var(--text-muted); margin-bottom: 20px; }
.cta-btn {
  display: inline-block; padding: 12px 36px; border-radius: 50px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff; font-weight: 600; font-size: 16px;
  box-shadow: 0 4px 20px rgba(255, 106, 0, 0.3);
  transition: var(--transition);
}
.cta-btn:hover { transform: translateY(-3px); box-shadow: 0 8px 30px rgba(255, 106, 0, 0.4); }

/* ===== Not Found ===== */
.not-found { text-align: center; padding: 100px 24px; }
.not-found i { font-size: 64px; color: var(--primary); margin-bottom: 24px; opacity: 0.6; }
.not-found h2 { font-size: 32px; margin-bottom: 12px; }
.not-found p { color: var(--text-muted); font-size: 18px; margin-bottom: 32px; }
.not-found .back-home { display: inline-block; padding: 12px 36px; border-radius: 50px; background: var(--primary); color: #fff; font-weight: 600; transition: var(--transition); }
.not-found .back-home:hover { background: var(--primary-dark); transform: translateY(-2px); }

/* ===== Footer ===== */
.site-footer {
  background: linear-gradient(180deg, var(--bg-section), #060612);
  border-top: 1px solid rgba(255, 106, 0, 0.08);
  padding: 60px 0 32px;
  margin-top: 20px;
}
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand .logo { margin-bottom: 16px; font-size: 22px; }
.footer-brand p { font-size: 14px; color: var(--text-dim); line-height: 1.8; max-width: 320px; }
.footer-col h5 { font-size: 15px; font-weight: 600; color: var(--text-light); margin-bottom: 18px; letter-spacing: 0.5px; }
.footer-col a { display: block; font-size: 14px; color: var(--text-dim); padding: 5px 0; transition: var(--transition); }
.footer-col a:hover { color: var(--primary); padding-left: 4px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.05); padding-top: 24px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; font-size: 13px; color: var(--text-dim); }
.footer-bottom a { color: var(--text-dim); }
.footer-bottom a:hover { color: var(--primary); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .article-grid { grid-template-columns: 1fr; }
  .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav-list { display: none; position: absolute; top: var(--header-h); left: 0; right: 0; background: rgba(10,10,26,0.98); flex-direction: column; padding: 16px 24px; gap: 4px; border-bottom: 2px solid var(--primary); backdrop-filter: blur(18px); }
  .nav-list.open { display: flex; }
  .nav-link { width: 100%; padding: 12px 16px; }
  .nav-cta { text-align: center; }
  .nav-toggle { display: flex; }

  .banner-title { font-size: 28px; }
  .page-banner { padding: 60px 0 40px; }
  .article-body { padding: 24px 20px; }
  .article-body h2 { font-size: 22px; }
  .article-sidebar { grid-template-columns: 1fr; }

  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 520px) {
  .banner-title { font-size: 24px; }
  .banner-meta { flex-direction: column; gap: 8px; }
  .article-body { padding: 16px; }
  .article-body p { font-size: 15px; }
  .container { padding: 0 16px; }
}