/* roulang page: index */
:root {
  --primary: #00e5ff;
  --primary-dark: #00b8d4;
  --primary-glow: rgba(0, 229, 255, 0.35);
  --secondary: #7c4dff;
  --secondary-dark: #651fff;
  --accent: #ff6d00;
  --bg-dark: #0a0e1a;
  --bg-card: #111827;
  --bg-card-hover: #1a2236;
  --bg-section: #0f1422;
  --bg-section-alt: #0c1120;
  --text-primary: #f0f4ff;
  --text-secondary: #a0b4d0;
  --text-muted: #6a7f9e;
  --border-color: #1e2a45;
  --border-glow: rgba(0, 229, 255, 0.15);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-card: 0 4px 30px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 30px rgba(0, 229, 255, 0.08);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-body: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section-padding { padding: 90px 0; }
.section-padding-sm { padding: 60px 0; }
.section-title {
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
  line-height: 1.3;
}
.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 680px;
  margin-bottom: 48px;
  line-height: 1.6;
}
.text-gradient {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.neon-glow { text-shadow: 0 0 30px var(--primary-glow); }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 34px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  line-height: 1.2;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  box-shadow: 0 4px 25px rgba(0, 229, 255, 0.25);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 40px rgba(0, 229, 255, 0.4);
  color: #fff;
}
.btn-outline {
  background: transparent;
  border: 2px solid var(--primary);
  color: var(--primary);
}
.btn-outline:hover {
  background: var(--primary);
  color: var(--bg-dark);
  transform: translateY(-2px);
}
.btn-accent {
  background: linear-gradient(135deg, var(--accent), #ff9100);
  color: #fff;
  box-shadow: 0 4px 25px rgba(255, 109, 0, 0.3);
}
.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 40px rgba(255, 109, 0, 0.45);
  color: #fff;
}
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  transition: var(--transition);
  box-shadow: var(--shadow-card);
}
.card:hover {
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow), var(--shadow-card);
  transform: translateY(-4px);
}
.badge {
  display: inline-block;
  padding: 4px 16px;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.3px;
  text-transform: uppercase;
}
.badge-primary {
  background: rgba(0, 229, 255, 0.12);
  color: var(--primary);
  border: 1px solid rgba(0, 229, 255, 0.2);
}
.badge-secondary {
  background: rgba(124, 77, 255, 0.12);
  color: var(--secondary);
  border: 1px solid rgba(124, 77, 255, 0.2);
}
.badge-accent {
  background: rgba(255, 109, 0, 0.12);
  color: var(--accent);
  border: 1px solid rgba(255, 109, 0, 0.2);
}
/* ===== Header / Nav ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(10, 14, 26, 0.92);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(0, 229, 255, 0.08);
  transition: var(--transition);
}
.site-header.scrolled { box-shadow: 0 4px 30px rgba(0, 0, 0, 0.6); }
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}
.logo {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, var(--primary), #fff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: 0 0 40px rgba(0, 229, 255, 0.2);
  text-decoration: none;
}
.logo:hover { opacity: 0.9; }
.nav-menu { display: flex; align-items: center; gap: 8px; }
.nav-menu a {
  color: var(--text-secondary);
  padding: 8px 18px;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}
.nav-menu a:hover,
.nav-menu a.active {
  color: var(--primary);
  background: rgba(0, 229, 255, 0.06);
}
.nav-menu a.active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  box-shadow: 0 0 12px var(--primary-glow);
}
.nav-cta {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff !important;
  padding: 10px 24px !important;
  border-radius: 50px;
  font-weight: 600;
  box-shadow: 0 0 25px rgba(0, 229, 255, 0.15);
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 0 40px rgba(0, 229, 255, 0.3); }
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.6rem;
  cursor: pointer;
  padding: 4px;
}
/* ===== Hero ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding: 120px 0 80px;
  background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10, 14, 26, 0.92) 40%, rgba(10, 14, 26, 0.7) 70%, rgba(10, 14, 26, 0.4));
  z-index: 1;
}
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(0, 229, 255, 0.05) 0%, transparent 70%);
  z-index: 1;
}
.hero-content { position: relative; z-index: 2; max-width: 820px; }
.hero-badge {
  display: inline-block;
  padding: 6px 20px;
  border-radius: 50px;
  background: rgba(0, 229, 255, 0.1);
  border: 1px solid rgba(0, 229, 255, 0.2);
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 24px;
  letter-spacing: 0.5px;
}
.hero h1 {
  font-size: 3.6rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: -1px;
}
.hero p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin-bottom: 36px;
  line-height: 1.7;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 50px;
  padding-top: 30px;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.stat-item { text-align: left; }
.stat-number {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
}
.stat-label { font-size: 0.9rem; color: var(--text-muted); margin-top: 4px; }
/* ===== Features / 核心卖点 ===== */
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 18px;
  background: rgba(0, 229, 255, 0.08);
  color: var(--primary);
  border: 1px solid rgba(0, 229, 255, 0.1);
}
.feature-card h3 { font-size: 1.25rem; font-weight: 700; margin-bottom: 10px; }
.feature-card p { color: var(--text-secondary); font-size: 0.95rem; line-height: 1.7; }
/* ===== Info / 资讯列表 ===== */
.info-section { background: var(--bg-section-alt); }
.info-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.info-item {
  display: flex;
  gap: 18px;
  padding: 20px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: var(--transition);
  align-items: flex-start;
}
.info-item:hover {
  border-color: rgba(0, 229, 255, 0.15);
  box-shadow: var(--shadow-glow);
  transform: translateX(4px);
}
.info-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: rgba(0, 229, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 1rem;
  flex-shrink: 0;
}
.info-body { flex: 1; min-width: 0; }
.info-body .badge { margin-bottom: 6px; }
.info-body h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 6px;
  line-height: 1.4;
}
.info-body h4 a { color: var(--text-primary); }
.info-body h4 a:hover { color: var(--primary); }
.info-body p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.info-meta {
  display: flex;
  gap: 16px;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 8px;
}
.info-meta span { display: flex; align-items: center; gap: 4px; }
/* ===== Categories / 分类入口 ===== */
.cat-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.cat-card {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.cat-card:hover {
  border-color: rgba(0, 229, 255, 0.2);
  box-shadow: var(--shadow-glow), var(--shadow-card);
  transform: translateY(-4px);
}
.cat-card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
}
.cat-card-body { padding: 24px 28px; flex: 1; display: flex; flex-direction: column; }
.cat-card-body .badge { align-self: flex-start; margin-bottom: 12px; }
.cat-card-body h3 { font-size: 1.3rem; font-weight: 700; margin-bottom: 8px; }
.cat-card-body p { color: var(--text-secondary); font-size: 0.95rem; line-height: 1.7; flex: 1; }
.cat-card-body .btn { align-self: flex-start; margin-top: 16px; padding: 10px 28px; font-size: 0.9rem; }
/* ===== Testimonial / 用户评价 ===== */
.testimonial-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  transition: var(--transition);
}
.testimonial-card:hover {
  border-color: rgba(0, 229, 255, 0.12);
  box-shadow: var(--shadow-glow);
}
.testimonial-stars { color: #ffc107; font-size: 0.9rem; margin-bottom: 14px; letter-spacing: 2px; }
.testimonial-card blockquote {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  font-style: italic;
  margin-bottom: 16px;
}
.testimonial-author { display: flex; align-items: center; gap: 12px; }
.testimonial-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
  color: #fff;
  flex-shrink: 0;
}
.testimonial-name { font-size: 0.9rem; font-weight: 600; }
.testimonial-role { font-size: 0.8rem; color: var(--text-muted); }
/* ===== FAQ ===== */
.faq-list { max-width: 860px; 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-md);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: rgba(0, 229, 255, 0.1); }
.faq-question {
  width: 100%;
  background: none;
  border: none;
  padding: 22px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  color: var(--text-primary);
  font-size: 1.05rem;
  font-weight: 600;
  text-align: left;
  transition: var(--transition);
  gap: 16px;
}
.faq-question:hover { color: var(--primary); }
.faq-question i { transition: var(--transition); color: var(--primary); font-size: 0.9rem; }
.faq-item.active .faq-question i { transform: rotate(180deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  padding: 0 28px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}
.faq-item.active .faq-answer {
  max-height: 400px;
  padding: 0 28px 22px;
}
/* ===== CTA ===== */
.cta-section {
  background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
  position: relative;
  padding: 100px 0;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10, 14, 26, 0.92) 30%, rgba(10, 14, 26, 0.7));
  z-index: 1;
}
.cta-content { position: relative; z-index: 2; text-align: center; max-width: 700px; margin: 0 auto; }
.cta-content h2 { font-size: 2.4rem; font-weight: 800; margin-bottom: 16px; }
.cta-content p { color: var(--text-secondary); font-size: 1.1rem; margin-bottom: 32px; line-height: 1.7; }
.cta-content .btn { font-size: 1.1rem; padding: 16px 42px; }
/* ===== Footer ===== */
.site-footer {
  background: #070b14;
  border-top: 1px solid rgba(0, 229, 255, 0.06);
  padding: 56px 0 28px;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand .logo { font-size: 1.4rem; }
.footer-brand p {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.7;
  margin-top: 14px;
  max-width: 320px;
}
.footer-col h4 { font-size: 1rem; font-weight: 700; margin-bottom: 18px; color: var(--text-primary); }
.footer-col a {
  display: block;
  color: var(--text-muted);
  font-size: 0.9rem;
  padding: 4px 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: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  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); }
/* ===== Mobile ===== */
@media (max-width: 1024px) {
  .hero h1 { font-size: 2.8rem; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .testimonial-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
}
@media (max-width: 768px) {
  .mobile-toggle { display: block; }
  .nav-menu {
    position: fixed;
    top: 70px;
    left: 0;
    width: 100%;
    background: rgba(10, 14, 26, 0.98);
    backdrop-filter: blur(18px);
    flex-direction: column;
    padding: 20px 24px;
    gap: 6px;
    transform: translateY(-120%);
    opacity: 0;
    transition: var(--transition);
    border-bottom: 1px solid rgba(0, 229, 255, 0.08);
    pointer-events: none;
  }
  .nav-menu.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-menu a { width: 100%; padding: 12px 18px; }
  .nav-menu a.active::after { display: none; }
  .hero { min-height: auto; padding: 100px 0 60px; }
  .hero h1 { font-size: 2.2rem; }
  .hero p { font-size: 1rem; }
  .hero-stats { gap: 24px; flex-wrap: wrap; }
  .stat-number { font-size: 1.6rem; }
  .section-title { font-size: 1.8rem; }
  .features-grid { grid-template-columns: 1fr; }
  .info-grid { grid-template-columns: 1fr; }
  .cat-grid { grid-template-columns: 1fr; }
  .testimonial-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .section-padding { padding: 60px 0; }
  .cta-content h2 { font-size: 1.8rem; }
}
@media (max-width: 520px) {
  .hero h1 { font-size: 1.8rem; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .container { padding: 0 16px; }
  .card { padding: 24px 18px; }
  .faq-question { padding: 18px 20px; font-size: 0.95rem; }
  .faq-answer { padding: 0 20px; }
  .faq-item.active .faq-answer { padding: 0 20px 18px; }
}

/* roulang page: article */
:root {
            --primary: #00f0ff;
            --primary-dark: #009dab;
            --primary-glow: rgba(0, 240, 255, 0.25);
            --accent: #ff2d95;
            --accent-glow: rgba(255, 45, 149, 0.25);
            --bg-dark: #0a0e1a;
            --bg-card: #111827;
            --bg-card-hover: #1a2332;
            --bg-section: #0d1225;
            --bg-footer: #070b14;
            --text-main: #e8edf5;
            --text-muted: #8892a8;
            --text-dim: #5a6478;
            --border-color: #1e293b;
            --border-glow: rgba(0, 240, 255, 0.12);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(0, 240, 255, 0.06);
            --shadow-glow: 0 0 40px rgba(0, 240, 255, 0.08);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
        }
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font-body);
            background: var(--bg-dark);
            color: var(--text-main);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: #fff; text-shadow: 0 0 12px var(--primary-glow); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-md); }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

        /* header / nav */
        .site-header {
            background: rgba(10, 14, 26, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 1000;
            padding: 0 24px;
        }
        .header-inner {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }
        .logo {
            font-size: 1.4rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary), #7b61ff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: 1px;
            text-shadow: none;
        }
        .logo:hover {
            -webkit-text-fill-color: transparent;
            filter: brightness(1.2);
        }
        .nav-menu { display: flex; align-items: center; gap: 6px; }
        .nav-menu a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-muted);
            transition: var(--transition);
            position: relative;
        }
        .nav-menu a::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 2px;
            background: var(--primary);
            box-shadow: 0 0 12px var(--primary-glow);
            transition: var(--transition);
            border-radius: 2px;
        }
        .nav-menu a:hover { color: #fff; background: rgba(0, 240, 255, 0.06); }
        .nav-menu a:hover::after { width: 60%; }
        .nav-menu a.active {
            color: var(--primary);
            background: rgba(0, 240, 255, 0.08);
        }
        .nav-menu a.active::after { width: 70%; }
        .nav-cta {
            background: linear-gradient(135deg, var(--primary), #7b61ff) !important;
            color: #0a0e1a !important;
            font-weight: 700 !important;
            padding: 8px 22px !important;
            border-radius: var(--radius-sm) !important;
            box-shadow: 0 0 24px rgba(0, 240, 255, 0.15);
            transition: var(--transition) !important;
        }
        .nav-cta::after { display: none !important; }
        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 40px rgba(0, 240, 255, 0.3) !important;
            color: #0a0e1a !important;
        }
        .nav-cta i { margin-right: 6px; }
        .menu-toggle {
            display: none;
            background: none;
            border: 1px solid var(--border-color);
            color: var(--text-main);
            font-size: 1.4rem;
            padding: 6px 14px;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: var(--transition);
        }
        .menu-toggle:hover { background: rgba(0, 240, 255, 0.06); border-color: var(--primary); }

        /* hero banner */
        .article-hero {
            position: relative;
            padding: 100px 0 80px;
            background: linear-gradient(160deg, #0a0e1a 0%, #0d1a2e 50%, #0a0e1a 100%);
            overflow: hidden;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -10%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.04) 0%, transparent 70%);
            pointer-events: none;
        }
        .article-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--bg-dark), transparent);
            pointer-events: none;
        }
        .article-hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center 30% / cover no-repeat;
            opacity: 0.12;
            pointer-events: none;
        }
        .article-hero .container { position: relative; z-index: 2; }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px 28px;
            margin-bottom: 18px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .article-meta span { display: flex; align-items: center; gap: 6px; }
        .article-meta i { color: var(--primary); font-size: 0.8rem; }
        .article-category-badge {
            display: inline-block;
            padding: 4px 16px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            text-transform: uppercase;
            background: rgba(0, 240, 255, 0.12);
            color: var(--primary);
            border: 1px solid rgba(0, 240, 255, 0.15);
            margin-bottom: 14px;
        }
        .article-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 20px;
            background: linear-gradient(135deg, #fff 40%, var(--primary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .article-hero .lead {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 720px;
            line-height: 1.8;
        }

        /* main content */
        .article-main {
            padding: 60px 0 80px;
            background: var(--bg-dark);
        }
        .article-content-wrap {
            max-width: 860px;
            margin: 0 auto;
        }
        .article-content {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 48px 52px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text-main);
        }
        .article-content h2 {
            font-size: 1.7rem;
            font-weight: 700;
            margin: 36px 0 16px;
            color: #fff;
            border-left: 4px solid var(--primary);
            padding-left: 18px;
        }
        .article-content h3 {
            font-size: 1.3rem;
            font-weight: 600;
            margin: 28px 0 12px;
            color: #e0e8f5;
        }
        .article-content p { margin-bottom: 18px; color: var(--text-muted); }
        .article-content ul, .article-content ol { margin: 14px 0 18px 22px; color: var(--text-muted); }
        .article-content li { margin-bottom: 8px; }
        .article-content a { color: var(--primary); border-bottom: 1px solid rgba(0, 240, 255, 0.2); }
        .article-content a:hover { border-bottom-color: var(--primary); }
        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: rgba(0, 240, 255, 0.04);
            padding: 18px 24px;
            margin: 24px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-muted);
            font-style: italic;
        }
        .article-content img { margin: 28px auto; border-radius: var(--radius-md); box-shadow: var(--shadow-card); }
        .article-content code {
            background: rgba(0, 240, 255, 0.08);
            padding: 2px 10px;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--primary);
        }
        .article-content pre {
            background: #050810;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px;
            overflow-x: auto;
            margin: 24px 0;
        }
        .article-content pre code { background: none; padding: 0; color: #c9d1d9; }

        .article-not-found {
            text-align: center;
            padding: 80px 20px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
        }
        .article-not-found i { font-size: 3.6rem; color: var(--text-dim); margin-bottom: 20px; }
        .article-not-found h2 { font-size: 1.6rem; color: var(--text-main); margin-bottom: 12px; }
        .article-not-found p { color: var(--text-muted); margin-bottom: 24px; }
        .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--primary), #7b61ff);
            color: #0a0e1a;
            font-weight: 700;
            transition: var(--transition);
        }
        .btn-back:hover { transform: translateY(-2px); box-shadow: 0 0 32px rgba(0, 240, 255, 0.25); color: #0a0e1a; }

        /* related posts */
        .related-section {
            padding: 60px 0 80px;
            background: var(--bg-section);
            border-top: 1px solid var(--border-color);
        }
        .related-section h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 36px;
            text-align: center;
            color: #fff;
        }
        .related-section h2 span { color: var(--primary); }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }
        .related-card:hover {
            transform: translateY(-6px);
            border-color: rgba(0, 240, 255, 0.2);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(0, 240, 255, 0.06);
        }
        .related-card .card-img {
            height: 180px;
            background: var(--bg-card-hover);
            overflow: hidden;
        }
        .related-card .card-img img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
        .related-card:hover .card-img img { transform: scale(1.05); }
        .related-card .card-body { padding: 20px 22px 24px; }
        .related-card .card-body h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 8px; }
        .related-card .card-body h3 a { color: var(--text-main); }
        .related-card .card-body h3 a:hover { color: var(--primary); }
        .related-card .card-body p { font-size: 0.88rem; color: var(--text-muted); line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .related-card .card-meta { display: flex; justify-content: space-between; align-items: center; margin-top: 14px; font-size: 0.78rem; color: var(--text-dim); }

        /* CTA */
        .article-cta {
            padding: 60px 0;
            background: linear-gradient(160deg, #0a0e1a, #0d1a2e);
            border-top: 1px solid var(--border-color);
            text-align: center;
        }
        .article-cta h2 { font-size: 1.8rem; font-weight: 700; margin-bottom: 12px; color: #fff; }
        .article-cta p { color: var(--text-muted); max-width: 560px; margin: 0 auto 28px; font-size: 1.05rem; }
        .cta-btn-group { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 34px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 1rem;
            transition: var(--transition);
        }
        .cta-btn.primary {
            background: linear-gradient(135deg, var(--primary), #7b61ff);
            color: #0a0e1a;
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.15);
        }
        .cta-btn.primary:hover { transform: translateY(-3px); box-shadow: 0 0 50px rgba(0, 240, 255, 0.3); color: #0a0e1a; }
        .cta-btn.outline {
            border: 1px solid var(--border-color);
            color: var(--text-main);
            background: transparent;
        }
        .cta-btn.outline:hover { border-color: var(--primary); color: var(--primary); background: rgba(0, 240, 255, 0.04); }

        /* footer */
        .site-footer {
            background: var(--bg-footer);
            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: 12px; display: inline-block; }
        .footer-brand p { font-size: 0.85rem; color: var(--text-muted); line-height: 1.7; margin-top: 8px; max-width: 340px; }
        .footer-col h4 { font-size: 0.95rem; font-weight: 700; color: #fff; margin-bottom: 16px; letter-spacing: 0.5px; }
        .footer-col a {
            display: block;
            font-size: 0.85rem;
            color: var(--text-muted);
            padding: 5px 0;
            transition: var(--transition);
        }
        .footer-col a:hover { color: var(--primary); padding-left: 4px; }
        .footer-col a i { width: 20px; margin-right: 4px; color: var(--primary); }
        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--text-dim);
        }
        .footer-bottom a { color: var(--text-muted); }
        .footer-bottom a:hover { color: var(--primary); }

        /* breadcrumb */
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            align-items: center;
            font-size: 0.82rem;
            color: var(--text-muted);
            margin-bottom: 20px;
        }
        .breadcrumb a { color: var(--text-muted); }
        .breadcrumb a:hover { color: var(--primary); }
        .breadcrumb .sep { color: var(--text-dim); margin: 0 4px; }
        .breadcrumb .current { color: var(--primary); }

        /* responsive */
        @media screen and (max-width: 1024px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .article-hero h1 { font-size: 2.2rem; }
        }
        @media screen and (max-width: 768px) {
            .menu-toggle { display: block; }
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: rgba(10, 14, 26, 0.98);
                backdrop-filter: blur(20px);
                border-bottom: 1px solid var(--border-color);
                padding: 16px 24px;
                gap: 4px;
            }
            .nav-menu.open { display: flex; }
            .nav-menu a { padding: 12px 18px; width: 100%; }
            .nav-menu a::after { display: none; }
            .nav-cta { text-align: center; }
            .article-content { padding: 28px 24px; }
            .article-hero { padding: 70px 0 50px; }
            .article-hero h1 { font-size: 1.8rem; }
            .related-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .article-hero .lead { font-size: 1rem; }
        }
        @media screen and (max-width: 520px) {
            .container { padding: 0 16px; }
            .article-hero h1 { font-size: 1.5rem; }
            .article-content { padding: 20px 16px; font-size: 0.97rem; }
            .article-meta { gap: 10px 16px; font-size: 0.78rem; }
            .cta-btn { padding: 12px 24px; font-size: 0.9rem; }
            .related-card .card-body { padding: 16px; }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #00d4ff;
            --primary-dim: #009bb8;
            --primary-glow: rgba(0, 212, 255, 0.35);
            --accent: #7c3aed;
            --accent-glow: rgba(124, 58, 237, 0.35);
            --bg-dark: #0b0e17;
            --bg-card: #121827;
            --bg-card-hover: #1a2237;
            --bg-elevated: #1e2a3d;
            --text-main: #f1f5f9;
            --text-muted: #94a3b8;
            --text-dim: #64748b;
            --border-color: rgba(0, 212, 255, 0.15);
            --border-glow: rgba(0, 212, 255, 0.3);
            --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, 212, 255, 0.15);
            --space-xs: 0.5rem;
            --space-sm: 1rem;
            --space-md: 2rem;
            --space-lg: 4rem;
            --space-xl: 6rem;
            --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font-main);
            background: var(--bg-dark);
            color: var(--text-main);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: #fff;
            text-shadow: 0 0 12px var(--primary-glow);
        }
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
            border-radius: 4px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        ul,
        ol {
            list-style: none;
        }
        ::selection {
            background: var(--primary);
            color: #000;
        }
        /* ===== Container ===== */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--space-md);
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 var(--space-sm);
            }
        }
        /* ===== Header / Nav (暗色霓虹) ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(11, 14, 23, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
            transition: var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }
        .logo {
            font-size: 1.5rem;
            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;
            text-shadow: 0 0 30px var(--primary-glow);
            transition: var(--transition);
        }
        .logo:hover {
            text-shadow: 0 0 50px var(--primary-glow);
            -webkit-text-fill-color: transparent;
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 1.8rem;
        }
        .nav-menu a {
            color: var(--text-muted);
            font-size: 0.95rem;
            font-weight: 500;
            padding: 0.4rem 0;
            position: relative;
            transition: var(--transition);
            letter-spacing: 0.3px;
        }
        .nav-menu a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            box-shadow: 0 0 12px var(--primary-glow);
            transition: var(--transition);
            border-radius: 2px;
        }
        .nav-menu a:hover {
            color: #fff;
        }
        .nav-menu a:hover::after {
            width: 100%;
        }
        .nav-menu a.active {
            color: var(--primary);
            text-shadow: 0 0 20px var(--primary-glow);
        }
        .nav-menu a.active::after {
            width: 100%;
            background: var(--primary);
            box-shadow: 0 0 20px var(--primary-glow);
        }
        .nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff !important;
            padding: 0.65rem 1.6rem !important;
            border-radius: 50px;
            font-weight: 600 !important;
            box-shadow: 0 0 25px var(--primary-glow);
            transition: var(--transition);
            border: none;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        .nav-cta i {
            font-size: 0.85rem;
        }
        .nav-cta:hover {
            transform: translateY(-2px) scale(1.03);
            box-shadow: 0 0 45px var(--primary-glow);
            color: #fff !important;
            text-shadow: none !important;
        }
        .nav-cta::after {
            display: none !important;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-main);
            font-size: 1.6rem;
            cursor: pointer;
            padding: 0.3rem;
            transition: var(--transition);
        }
        .nav-toggle:hover {
            color: var(--primary);
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .nav-menu {
                position: fixed;
                top: 70px;
                left: 0;
                right: 0;
                background: rgba(11, 14, 23, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 1.5rem 2rem;
                gap: 1rem;
                border-bottom: 1px solid var(--border-color);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
                box-shadow: var(--shadow-lg);
            }
            .nav-menu.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: all;
            }
            .nav-menu a {
                font-size: 1.05rem;
                padding: 0.6rem 0;
                width: 100%;
                text-align: center;
            }
            .nav-cta {
                justify-content: center;
                width: 100%;
                padding: 0.8rem 1.6rem !important;
            }
            .logo {
                font-size: 1.25rem;
            }
        }
        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 88vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 120px 0 80px;
            overflow: hidden;
            background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(11, 14, 23, 0.3) 0%, rgba(11, 14, 23, 0.85) 70%, var(--bg-dark) 100%);
            z-index: 1;
        }
        .hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(0, 212, 255, 0.05) 0%, transparent 40%, transparent 60%, rgba(124, 58, 237, 0.05) 100%);
            z-index: 1;
        }
        .hero .container {
            position: relative;
            z-index: 2;
            max-width: 900px;
        }
        .hero-badge {
            display: inline-block;
            background: rgba(0, 212, 255, 0.12);
            border: 1px solid rgba(0, 212, 255, 0.25);
            padding: 0.4rem 1.2rem;
            border-radius: 50px;
            font-size: 0.85rem;
            color: var(--primary);
            letter-spacing: 1px;
            text-transform: uppercase;
            margin-bottom: 1.5rem;
            backdrop-filter: blur(4px);
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.08);
        }
        .hero h1 {
            font-size: 3.6rem;
            font-weight: 900;
            line-height: 1.2;
            margin-bottom: 1.2rem;
            background: linear-gradient(135deg, #ffffff 0%, var(--primary) 50%, var(--accent) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-shadow: none;
            letter-spacing: -0.5px;
        }
        .hero .subtitle {
            font-size: 1.25rem;
            color: var(--text-muted);
            max-width: 680px;
            margin: 0 auto 2.2rem;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            justify-content: center;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            padding: 0.9rem 2.4rem;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.05rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 0 30px var(--primary-glow);
        }
        .btn-primary:hover {
            transform: translateY(-3px) scale(1.02);
            box-shadow: 0 0 55px var(--primary-glow);
            color: #fff;
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            background: transparent;
            color: var(--text-main);
            padding: 0.85rem 2.2rem;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1.05rem;
            border: 1.5px solid var(--border-color);
            cursor: pointer;
            transition: var(--transition);
        }
        .btn-secondary:hover {
            border-color: var(--primary);
            color: var(--primary);
            box-shadow: 0 0 25px var(--primary-glow);
            transform: translateY(-2px);
        }
        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 3rem;
            margin-top: 3.5rem;
            flex-wrap: wrap;
        }
        .hero-stat {
            text-align: center;
        }
        .hero-stat .num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            text-shadow: 0 0 20px var(--primary-glow);
        }
        .hero-stat .label {
            font-size: 0.9rem;
            color: var(--text-dim);
            margin-top: 0.2rem;
        }
        @media (max-width: 768px) {
            .hero {
                min-height: 70vh;
                padding: 100px 0 60px;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
            .hero .subtitle {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 1.5rem;
            }
            .hero-stat .num {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 520px) {
            .hero h1 {
                font-size: 1.8rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .btn-primary,
            .btn-secondary {
                width: 100%;
                justify-content: center;
            }
        }
        /* ===== Section通用 ===== */
        .section {
            padding: var(--space-xl) 0;
        }
        .section-title {
            font-size: 2.4rem;
            font-weight: 800;
            text-align: center;
            margin-bottom: 0.8rem;
            background: linear-gradient(135deg, #fff, var(--primary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .section-subtitle {
            text-align: center;
            color: var(--text-muted);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto var(--space-lg);
            line-height: 1.7;
        }
        .section-divider {
            width: 80px;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            margin: 1rem auto 2.5rem;
            border-radius: 3px;
            box-shadow: 0 0 20px var(--primary-glow);
        }
        @media (max-width: 768px) {
            .section {
                padding: var(--space-lg) 0;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
            }
        }
        /* ===== 卡片网格 ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.8rem;
        }
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 640px) {
            .card-grid {
                grid-template-columns: 1fr;
            }
        }
        .card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 2rem 1.8rem;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: var(--transition);
        }
        .card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-glow);
            transform: translateY(-6px);
            box-shadow: var(--shadow-glow), var(--shadow-md);
        }
        .card:hover::before {
            opacity: 1;
        }
        .card .icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            background: rgba(0, 212, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--primary);
            margin-bottom: 1.2rem;
            border: 1px solid rgba(0, 212, 255, 0.1);
            transition: var(--transition);
        }
        .card:hover .icon {
            background: rgba(0, 212, 255, 0.15);
            box-shadow: 0 0 25px var(--primary-glow);
        }
        .card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 0.6rem;
            color: #fff;
        }
        .card p {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .card .tag {
            display: inline-block;
            background: rgba(0, 212, 255, 0.1);
            color: var(--primary);
            font-size: 0.75rem;
            padding: 0.2rem 0.8rem;
            border-radius: 50px;
            margin-top: 0.8rem;
            border: 1px solid rgba(0, 212, 255, 0.1);
        }
        /* ===== 流程步骤 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
            counter-reset: step;
        }
        @media (max-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .steps-grid {
                grid-template-columns: 1fr;
            }
        }
        .step-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 1.8rem 1.5rem;
            text-align: center;
            transition: var(--transition);
            position: relative;
        }
        .step-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-glow);
            transform: translateY(-4px);
            box-shadow: var(--shadow-glow);
        }
        .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            font-weight: 800;
            color: #fff;
            margin: 0 auto 1rem;
            box-shadow: 0 0 25px var(--primary-glow);
        }
        .step-card h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.4rem;
        }
        .step-card p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.6;
        }
        /* ===== 图文区块 ===== */
        .feature-row {
            display: flex;
            align-items: center;
            gap: 3rem;
            margin-bottom: 3rem;
            flex-wrap: wrap;
        }
        .feature-row.reverse {
            flex-direction: row-reverse;
        }
        .feature-row .text-col {
            flex: 1;
            min-width: 280px;
        }
        .feature-row .img-col {
            flex: 1;
            min-width: 280px;
        }
        .feature-row .img-col img {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border-color);
            width: 100%;
            height: auto;
            object-fit: cover;
        }
        .feature-row h3 {
            font-size: 1.6rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.8rem;
        }
        .feature-row p {
            color: var(--text-muted);
            line-height: 1.8;
            font-size: 1rem;
        }
        .feature-row ul {
            margin-top: 1rem;
        }
        .feature-row ul li {
            color: var(--text-muted);
            padding: 0.3rem 0;
            padding-left: 1.8rem;
            position: relative;
            font-size: 0.95rem;
        }
        .feature-row ul li::before {
            content: '\f00c';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            color: var(--primary);
            position: absolute;
            left: 0;
            top: 0.3rem;
            font-size: 0.85rem;
        }
        @media (max-width: 768px) {
            .feature-row {
                flex-direction: column !important;
                gap: 1.5rem;
            }
            .feature-row h3 {
                font-size: 1.3rem;
            }
        }
        /* ===== 场景卡片 ===== */
        .scene-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.8rem;
        }
        @media (max-width: 1024px) {
            .scene-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .scene-grid {
                grid-template-columns: 1fr;
            }
        }
        .scene-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 2rem 1.8rem;
            text-align: center;
            transition: var(--transition);
        }
        .scene-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-glow);
            transform: translateY(-5px);
            box-shadow: var(--shadow-glow), var(--shadow-md);
        }
        .scene-card .scene-icon {
            font-size: 2.4rem;
            color: var(--primary);
            margin-bottom: 1rem;
            text-shadow: 0 0 25px var(--primary-glow);
        }
        .scene-card h4 {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.5rem;
        }
        .scene-card p {
            color: var(--text-muted);
            font-size: 0.92rem;
            line-height: 1.7;
        }
        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
        }
        .faq-question {
            width: 100%;
            background: none;
            border: none;
            padding: 1.2rem 1.8rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            color: var(--text-main);
            font-size: 1.05rem;
            font-weight: 600;
            text-align: left;
            transition: var(--transition);
            gap: 1rem;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question .faq-toggle {
            font-size: 1.2rem;
            color: var(--primary);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .faq-toggle {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 1.8rem 1.2rem;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
            display: none;
        }
        .faq-item.active .faq-answer {
            display: block;
        }
        /* ===== CTA区块 ===== */
        .cta-section {
            background: linear-gradient(135deg, rgba(0, 212, 255, 0.05), rgba(124, 58, 237, 0.05));
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle at 30% 50%, rgba(0, 212, 255, 0.03) 0%, transparent 50%),
                radial-gradient(circle at 70% 50%, rgba(124, 58, 237, 0.03) 0%, transparent 50%);
            pointer-events: none;
        }
        .cta-box {
            text-align: center;
            padding: var(--space-lg) 0;
            position: relative;
            z-index: 1;
        }
        .cta-box h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 1rem;
        }
        .cta-box p {
            color: var(--text-muted);
            font-size: 1.1rem;
            max-width: 560px;
            margin: 0 auto 2rem;
            line-height: 1.7;
        }
        .cta-box .btn-primary {
            font-size: 1.1rem;
            padding: 1rem 2.8rem;
        }
        @media (max-width: 768px) {
            .cta-box h2 {
                font-size: 1.6rem;
            }
            .cta-box p {
                font-size: 0.95rem;
            }
        }
        /* ===== Footer ===== */
        .site-footer {
            background: #080b13;
            border-top: 1px solid var(--border-color);
            padding: var(--space-lg) 0 var(--space-md);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.8rem;
            }
        }
        .footer-brand .logo {
            display: inline-block;
            margin-bottom: 1rem;
            font-size: 1.4rem;
        }
        .footer-brand p {
            color: var(--text-dim);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 1.2rem;
            letter-spacing: 0.5px;
        }
        .footer-col a {
            display: block;
            color: var(--text-dim);
            font-size: 0.9rem;
            padding: 0.35rem 0;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: var(--primary);
            padding-left: 4px;
        }
        .footer-col a i {
            width: 20px;
            color: var(--primary);
            margin-right: 0.3rem;
        }
        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 1.5rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 0.8rem;
            color: var(--text-dim);
            font-size: 0.85rem;
        }
        .footer-bottom a {
            color: var(--text-muted);
        }
        .footer-bottom a:hover {
            color: var(--primary);
        }
        @media (max-width: 520px) {
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        /* ===== 额外工具类 ===== */
        .text-center {
            text-align: center;
        }
        .mt-sm {
            margin-top: var(--space-sm);
        }
        .mt-md {
            margin-top: var(--space-md);
        }
        .mt-lg {
            margin-top: var(--space-lg);
        }
        .mb-lg {
            margin-bottom: var(--space-lg);
        }
        .gap-sm {
            gap: var(--space-sm);
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .bg-card-alt {
            background: rgba(18, 24, 39, 0.6);
        }
        /* ===== 暗色霓虹点缀 ===== */
        .neon-line {
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--primary), var(--accent), transparent);
            opacity: 0.3;
            margin: var(--space-lg) 0;
        }
        .glow-dot {
            display: inline-block;
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--primary);
            box-shadow: 0 0 15px var(--primary-glow);
            margin-right: 0.4rem;
            vertical-align: middle;
        }
        /* ===== 响应式微调 ===== */
        @media (max-width: 1024px) {
            .hero h1 {
                font-size: 2.8rem;
            }
        }
        @media (max-width: 768px) {
            .hero {
                min-height: 60vh;
                padding: 90px 0 50px;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .hero .subtitle {
                font-size: 0.95rem;
            }
            .hero-stats {
                gap: 1.2rem;
                margin-top: 2rem;
            }
            .hero-stat .num {
                font-size: 1.3rem;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .card {
                padding: 1.5rem 1.2rem;
            }
            .step-card {
                padding: 1.3rem 1rem;
            }
            .scene-card {
                padding: 1.5rem 1.2rem;
            }
            .faq-question {
                padding: 1rem 1.2rem;
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 1.2rem 1rem;
                font-size: 0.9rem;
            }
        }
        @media (max-width: 520px) {
            .hero h1 {
                font-size: 1.6rem;
            }
            .hero .subtitle {
                font-size: 0.88rem;
            }
            .btn-primary,
            .btn-secondary {
                font-size: 0.95rem;
                padding: 0.75rem 1.8rem;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .section-subtitle {
                font-size: 0.88rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .footer-brand p {
                max-width: 100%;
            }
            .cta-box h2 {
                font-size: 1.4rem;
            }
            .cta-box p {
                font-size: 0.9rem;
            }
        }
        /* ===== 滚动条美化 ===== */
        ::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-dark);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--primary-dim);
            border-radius: 3px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--primary);
        }
        /* ===== 加载动画 ===== */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-in {
            animation: fadeInUp 0.7s ease forwards;
        }
        .delay-1 {
            animation-delay: 0.1s;
        }
        .delay-2 {
            animation-delay: 0.2s;
        }
        .delay-3 {
            animation-delay: 0.3s;
        }
        .delay-4 {
            animation-delay: 0.4s;
        }