/* roulang page: index */
:root {
  --primary: #0f0f1a;
  --primary-light: #1a1a2e;
  --secondary: #16213e;
  --accent: #c9a84c;
  --accent-light: #e8c468;
  --accent-dark: #b8922e;
  --bg-card: rgba(255,255,255,0.04);
  --bg-card-hover: rgba(255,255,255,0.08);
  --text-primary: #f0f0f5;
  --text-secondary: #a0a0b5;
  --text-muted: #6b6b80;
  --border-color: rgba(255,255,255,0.08);
  --border-hover: rgba(255,255,255,0.18);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --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 16px 50px rgba(0,0,0,0.5);
  --transition: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

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

html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }

body {
  font-family: var(--font-sans);
  background: var(--primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}

a { color: var(--accent); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent-light); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }
input, textarea { font-family: inherit; }

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header / Navigation */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(15,15,26,0.88);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.site-header.scrolled {
  background: rgba(15,15,26,0.96);
  box-shadow: var(--shadow-md);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.5px;
}

.logo i {
  color: var(--accent);
  font-size: 1.5rem;
}

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

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

.nav-desktop a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}

.nav-desktop a i { font-size: 0.9rem; color: var(--accent); opacity: 0.7; }

.nav-desktop a:hover,
.nav-desktop a.active {
  color: var(--text-primary);
  background: var(--bg-card);
}

.nav-desktop a.active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 3px;
  background: var(--accent);
  border-radius: 3px;
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 26px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #0f0f1a !important;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.9rem;
  transition: var(--transition);
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(201,168,76,0.35);
  color: #0f0f1a !important;
  background: linear-gradient(135deg, var(--accent-light), var(--accent));
}

.nav-toggle {
  display: none;
  font-size: 1.5rem;
  color: var(--text-primary);
  padding: 8px;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
}

/* Mobile Nav */
.mobile-nav {
  display: none;
  position: fixed;
  top: 70px;
  left: 0;
  width: 100%;
  background: rgba(15,15,26,0.98);
  backdrop-filter: blur(18px);
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-color);
  z-index: 999;
  flex-direction: column;
  gap: 8px;
}

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

.mobile-nav a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 1rem;
  font-weight: 500;
  border: 1px solid transparent;
  transition: var(--transition);
}

.mobile-nav a i { color: var(--accent); width: 20px; text-align: center; }

.mobile-nav a:hover,
.mobile-nav a.active {
  color: var(--text-primary);
  background: var(--bg-card);
  border-color: var(--border-color);
}

.mobile-nav .nav-cta {
  margin-top: 8px;
  justify-content: center;
  padding: 14px;
}

/* Hero */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  overflow: hidden;
  background: linear-gradient(135deg, #0f0f1a 0%, #1a1a2e 40%, #16213e 100%);
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  opacity: 0.15;
  z-index: 0;
}

.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(201,168,76,0.08) 0%, transparent 60%),
              radial-gradient(ellipse at 70% 20%, rgba(201,168,76,0.05) 0%, transparent 50%);
  z-index: 1;
}

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

.hero-content {
  max-width: 700px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background: rgba(201,168,76,0.12);
  border: 1px solid rgba(201,168,76,0.25);
  border-radius: 50px;
  color: var(--accent-light);
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 24px;
}

.hero-badge i { font-size: 0.75rem; }

.hero h1 {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.5px;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #ffffff 0%, var(--accent-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 36px;
  max-width: 580px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 34px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #0f0f1a;
  font-size: 1rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  border: none;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(201,168,76,0.35);
  color: #0f0f1a;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 34px;
  background: var(--bg-card);
  color: var(--text-primary);
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-3px);
  color: var(--text-primary);
}

.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 50px;
  padding-top: 30px;
  border-top: 1px solid var(--border-color);
}

.hero-stat h3 {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent-light);
  line-height: 1.2;
}

.hero-stat p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Section common */
.section {
  padding: 90px 0;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 54px;
}

.section-header h2 {
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 14px;
  letter-spacing: -0.3px;
}

.section-header p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.8;
}

.section-header .accent-line {
  width: 50px;
  height: 4px;
  background: var(--accent);
  border-radius: 4px;
  margin: 16px auto 0;
}

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

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 36px 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(--accent), var(--accent-light));
  opacity: 0;
  transition: var(--transition);
}

.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}

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

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: var(--accent);
  background: rgba(201,168,76,0.1);
  margin-bottom: 20px;
  border: 1px solid rgba(201,168,76,0.15);
}

.feature-card h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.7;
}

/* Stats / Data */
.stats-section {
  background: linear-gradient(135deg, #1a1a2e 0%, #0f0f1a 100%);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  text-align: center;
}

.stat-item {
  padding: 30px 20px;
}

.stat-item .number {
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--accent-light);
  line-height: 1.2;
  letter-spacing: -1px;
}

.stat-item .label {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-top: 8px;
}

/* Showcase / Feature Detail */
.showcase-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
}

.showcase-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  aspect-ratio: 4 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
}

.showcase-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

.showcase-image:hover img {
  transform: scale(1.03);
}

.showcase-text h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.3px;
}

.showcase-text p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 20px;
}

.showcase-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.showcase-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.showcase-list li i {
  color: var(--accent);
  margin-top: 4px;
  flex-shrink: 0;
}

/* Posts / CMS List */
.posts-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.post-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}

.post-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.post-card-img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-bottom: 1px solid var(--border-color);
  background: var(--primary-light);
}

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

.post-card-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.post-card-meta span {
  display: flex;
  align-items: center;
  gap: 5px;
}

.post-card-meta i { font-size: 0.75rem; }

.post-card-body h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 8px;
  line-height: 1.5;
}

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

.post-card-body h3 a:hover { color: var(--accent); }

.post-card-body p {
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-empty {
  grid-column: 1 / -1;
  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);
}

.post-empty i {
  font-size: 2.5rem;
  margin-bottom: 16px;
  color: var(--text-muted);
}

/* Testimonials */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 30px 28px;
  transition: var(--transition);
}

.testimonial-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-4px);
}

.testimonial-stars {
  color: var(--accent);
  font-size: 0.9rem;
  margin-bottom: 14px;
  letter-spacing: 2px;
}

.testimonial-card blockquote {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.8;
  margin-bottom: 18px;
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.testimonial-author img {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border-color);
}

.testimonial-author strong {
  font-size: 0.9rem;
  font-weight: 600;
}

.testimonial-author span {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* FAQ */
.faq-list {
  max-width: 780px;
  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: var(--border-hover);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-primary);
  text-align: left;
  transition: var(--transition);
  gap: 16px;
}

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

.faq-question i {
  font-size: 0.85rem;
  color: var(--accent);
  transition: var(--transition);
  flex-shrink: 0;
}

.faq-item.open .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 24px;
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.8;
}

.faq-item.open .faq-answer {
  max-height: 300px;
  padding: 0 24px 20px;
}

/* CTA */
.cta-section {
  position: relative;
  padding: 100px 0;
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f0f1a 100%);
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
  opacity: 0.08;
  z-index: 0;
}

.cta-section .container {
  position: relative;
  z-index: 1;
  text-align: center;
}

.cta-content h2 {
  font-size: 2.4rem;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.3px;
}

.cta-content p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 560px;
  margin: 0 auto 32px;
  line-height: 1.8;
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
}

/* Footer */
.site-footer {
  background: #0a0a14;
  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: 1.2rem;
  margin-bottom: 14px;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.8;
  max-width: 280px;
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.footer-col a {
  display: block;
  padding: 5px 0;
  color: var(--text-muted);
  font-size: 0.88rem;
  transition: var(--transition);
}

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

.footer-bottom p {
  color: var(--text-muted);
  font-size: 0.82rem;
}

.footer-social {
  display: flex;
  gap: 12px;
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: var(--transition);
}

.footer-social a:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #0f0f1a;
}

/* Responsive */
@media (max-width: 1024px) {
  .hero h1 { font-size: 2.8rem; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .testimonials-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav-desktop { display: none; }
  .nav-toggle { display: block; }

  .hero { min-height: auto; padding: 100px 0 60px; }
  .hero h1 { font-size: 2.2rem; }
  .hero-sub { font-size: 1rem; }
  .hero-stats { flex-wrap: wrap; gap: 20px; }
  .hero-stat h3 { font-size: 1.4rem; }

  .section { padding: 60px 0; }
  .section-header h2 { font-size: 1.7rem; }

  .features-grid { grid-template-columns: 1fr; }
  .showcase-grid { grid-template-columns: 1fr; gap: 30px; }
  .showcase-text h2 { font-size: 1.6rem; }
  .posts-grid { grid-template-columns: 1fr; }
  .testimonials-grid { grid-template-columns: 1fr; }

  .cta-content h2 { font-size: 1.8rem; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .hero h1 { font-size: 1.8rem; }
  .hero-actions { flex-direction: column; width: 100%; }
  .hero-actions .btn-primary,
  .hero-actions .btn-secondary { width: 100%; justify-content: center; }
  .stats-grid { grid-template-columns: 1fr; }
  .stat-item .number { font-size: 2.2rem; }
  .section-header h2 { font-size: 1.4rem; }
  .cta-content h2 { font-size: 1.5rem; }
}

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #7c3aed;
            --primary-dark: #5b21b6;
            --primary-light: #a78bfa;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --accent-light: #fcd34d;
            --bg-dark: #0a0a1a;
            --bg-card: #1a1a2e;
            --bg-card-hover: #222244;
            --bg-elevated: #16213e;
            --text-primary: #e2e8f0;
            --text-secondary: #94a3b8;
            --text-muted: #64748b;
            --border-color: #2d2d4a;
            --border-light: #3d3d5a;
            --radius-sm: 8px;
            --radius-md: 14px;
            --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 40px rgba(124,58,237,0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --max-width: 1200px;
            --header-height: 76px;
        }

        /* ===== Reset & Base ===== */
        *, *::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);
            min-height: 100vh;
        }
        a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--accent); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        button, input, textarea { font-family: inherit; font-size: inherit; border: none; outline: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-primary); }
        h1 { font-size: 2.6rem; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.5rem; }
        h4 { font-size: 1.2rem; }
        p { margin-bottom: 1rem; color: var(--text-secondary); }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(10, 10, 26, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(45, 45, 74, 0.5);
            height: var(--header-height);
            transition: var(--transition);
        }
        .site-header.scrolled {
            background: rgba(10, 10, 26, 0.96);
            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-height);
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.5px;
        }
        .logo i {
            color: var(--primary-light);
            font-size: 1.8rem;
        }
        .logo span {
            color: var(--accent);
        }
        .logo:hover { color: var(--text-primary); }

        .nav-desktop {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-desktop a {
            padding: 10px 18px;
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 6px;
            position: relative;
        }
        .nav-desktop a i { font-size: 1rem; }
        .nav-desktop a:hover {
            color: var(--text-primary);
            background: rgba(124, 58, 237, 0.1);
        }
        .nav-desktop a.active {
            color: var(--accent);
            background: rgba(245, 158, 11, 0.1);
        }
        .nav-desktop a.active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--accent);
            border-radius: 2px;
        }
        .nav-desktop a.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 15px rgba(124,58,237,0.3);
        }
        .nav-desktop a.nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(124,58,237,0.4);
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
        }
        .nav-toggle {
            display: none;
            background: transparent;
            color: var(--text-primary);
            font-size: 1.5rem;
            cursor: pointer;
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(124,58,237,0.1);
            border-color: var(--primary);
        }
        .mobile-nav {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            background: rgba(10, 10, 26, 0.98);
            backdrop-filter: blur(20px);
            padding: 20px 24px;
            border-bottom: 1px solid var(--border-color);
            box-shadow: var(--shadow-lg);
            flex-direction: column;
            gap: 8px;
            z-index: 999;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
        }
        .mobile-nav.open {
            max-height: 400px;
            padding: 20px 24px;
        }
        .mobile-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 14px 18px;
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 1.05rem;
            transition: var(--transition);
        }
        .mobile-nav a i { width: 22px; text-align: center; font-size: 1.1rem; }
        .mobile-nav a:hover {
            background: rgba(124,58,237,0.1);
            color: var(--text-primary);
        }
        .mobile-nav a.active {
            color: var(--accent);
            background: rgba(245,158,11,0.1);
        }
        .mobile-nav a.nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            border-radius: var(--radius-md);
            justify-content: center;
            margin-top: 8px;
        }

        /* ===== Article Hero ===== */
        .article-hero {
            padding: 140px 0 60px;
            position: relative;
            background: linear-gradient(135deg, rgba(10,10,26,0.92), rgba(26,26,46,0.88)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            border-bottom: 1px solid var(--border-color);
        }
        .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 .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .article-hero .article-meta {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 20px;
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        .article-hero .article-meta .badge {
            background: rgba(124,58,237,0.2);
            color: var(--primary-light);
            padding: 4px 16px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            border: 1px solid rgba(124,58,237,0.3);
        }
        .article-hero .article-meta .date {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-hero .article-meta .date i { font-size: 0.85rem; }
        .article-hero h1 {
            font-size: 3rem;
            font-weight: 800;
            max-width: 900px;
            margin: 0 auto 16px;
            line-height: 1.25;
            background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary-light) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .article-hero p {
            max-width: 720px;
            margin: 0 auto;
            font-size: 1.1rem;
            color: var(--text-secondary);
        }

        /* ===== Article Content ===== */
        .article-section {
            padding: 60px 0 80px;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
        }
        .article-main {
            min-height: 300px;
        }
        .article-main .article-body {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 40px 44px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-md);
        }
        .article-body h2, .article-body h3, .article-body h4 {
            margin-top: 1.8em;
            margin-bottom: 0.8em;
            color: var(--text-primary);
        }
        .article-body h2 { font-size: 1.8rem; border-bottom: 1px solid var(--border-color); padding-bottom: 12px; }
        .article-body h3 { font-size: 1.4rem; }
        .article-body p {
            margin-bottom: 1.2rem;
            color: var(--text-secondary);
            font-size: 1.05rem;
            line-height: 1.8;
        }
        .article-body ul, .article-body ol {
            margin: 1rem 0 1.5rem 1.8rem;
            color: var(--text-secondary);
        }
        .article-body ul li { list-style: disc; margin-bottom: 8px; }
        .article-body ol li { list-style: decimal; margin-bottom: 8px; }
        .article-body a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
        .article-body a:hover { color: var(--accent-light); }
        .article-body blockquote {
            border-left: 4px solid var(--primary);
            background: rgba(124,58,237,0.08);
            padding: 16px 24px;
            margin: 1.5rem 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-body code {
            background: rgba(124,58,237,0.15);
            padding: 2px 10px;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--primary-light);
        }
        .article-body pre {
            background: var(--bg-elevated);
            border-radius: var(--radius-md);
            padding: 24px;
            overflow-x: auto;
            border: 1px solid var(--border-color);
            margin: 1.5rem 0;
        }
        .article-body pre code { background: transparent; padding: 0; color: var(--text-primary); }
        .article-body img {
            border-radius: var(--radius-md);
            margin: 1.5rem auto;
            box-shadow: var(--shadow-sm);
        }

        .article-not-found {
            text-align: center;
            padding: 80px 40px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
        }
        .article-not-found i {
            font-size: 4rem;
            color: var(--text-muted);
            margin-bottom: 24px;
            display: block;
        }
        .article-not-found h3 {
            font-size: 1.8rem;
            margin-bottom: 12px;
        }
        .article-not-found p {
            color: var(--text-muted);
            font-size: 1.1rem;
            margin-bottom: 24px;
        }
        .article-not-found a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-md);
            font-weight: 600;
            transition: var(--transition);
        }
        .article-not-found a:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(124,58,237,0.3);
        }

        /* ===== Article Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }
        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 28px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }
        .sidebar-card h4 {
            font-size: 1.1rem;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--accent);
        }
        .sidebar-card h4 i { font-size: 1rem; }
        .sidebar-card ul li {
            padding: 10px 0;
            border-bottom: 1px solid var(--border-color);
        }
        .sidebar-card ul li:last-child { border-bottom: none; }
        .sidebar-card ul li a {
            color: var(--text-secondary);
            font-size: 0.95rem;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
        }
        .sidebar-card ul li a:hover {
            color: var(--accent);
            transform: translateX(4px);
        }
        .sidebar-card ul li a i {
            font-size: 0.7rem;
            color: var(--primary-light);
        }
        .sidebar-cta {
            background: linear-gradient(135deg, rgba(124,58,237,0.12), rgba(245,158,11,0.08));
            border: 1px solid rgba(124,58,237,0.2);
            text-align: center;
        }
        .sidebar-cta p {
            font-size: 0.95rem;
            margin-bottom: 16px;
            color: var(--text-secondary);
        }
        .sidebar-cta .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: #0a0a1a;
            font-weight: 700;
            border-radius: var(--radius-md);
            font-size: 0.95rem;
            transition: var(--transition);
        }
        .sidebar-cta .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(245,158,11,0.3);
        }

        /* ===== Tags & Share ===== */
        .article-tags {
            margin-top: 40px;
            padding-top: 28px;
            border-top: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
        }
        .article-tags .tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .article-tags .tags span {
            background: rgba(124,58,237,0.1);
            color: var(--primary-light);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 500;
            border: 1px solid rgba(124,58,237,0.2);
            transition: var(--transition);
            cursor: default;
        }
        .article-tags .tags span:hover {
            background: rgba(124,58,237,0.2);
        }
        .article-share {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .article-share span {
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        .article-share a {
            width: 38px;
            height: 38px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
            font-size: 1rem;
            transition: var(--transition);
        }
        .article-share a:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-2px);
        }

        /* ===== Related Posts ===== */
        .related-section {
            padding: 60px 0;
            background: rgba(26, 26, 46, 0.3);
        }
        .related-section h2 {
            text-align: center;
            margin-bottom: 40px;
            font-size: 2rem;
        }
        .related-section h2 i {
            color: var(--accent);
            margin-right: 10px;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .related-card:hover {
            transform: translateY(-6px);
            border-color: var(--primary);
            box-shadow: var(--shadow-lg), var(--shadow-glow);
        }
        .related-card .card-img {
            height: 200px;
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .related-card .card-img .tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(124,58,237,0.85);
            color: #fff;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 600;
            backdrop-filter: blur(4px);
        }
        .related-card .card-body {
            padding: 22px 24px 24px;
        }
        .related-card .card-body h3 {
            font-size: 1.1rem;
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .related-card .card-body h3 a {
            color: var(--text-primary);
        }
        .related-card .card-body h3 a:hover {
            color: var(--accent);
        }
        .related-card .card-body p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 14px;
            line-height: 1.6;
        }
        .related-card .card-body .meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .related-card .card-body .meta i { font-size: 0.75rem; }

        /* ===== FAQ Section ===== */
        .faq-section {
            padding: 70px 0;
            background: var(--bg-dark);
        }
        .faq-section h2 {
            text-align: center;
            margin-bottom: 12px;
            font-size: 2rem;
        }
        .faq-section .faq-sub {
            text-align: center;
            color: var(--text-muted);
            margin-bottom: 44px;
            font-size: 1.05rem;
        }
        .faq-grid {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .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-light);
        }
        .faq-item .faq-question {
            padding: 20px 28px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--text-primary);
            transition: var(--transition);
            user-select: none;
        }
        .faq-item .faq-question i {
            color: var(--primary-light);
            font-size: 0.9rem;
            transition: transform 0.3s ease;
        }
        .faq-item.active .faq-question i {
            transform: rotate(45deg);
            color: var(--accent);
        }
        .faq-item .faq-question:hover {
            color: var(--accent);
        }
        .faq-item .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
        }
        .faq-item .faq-answer p {
            padding: 0 28px 20px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
            margin: 0;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, rgba(124,58,237,0.08), rgba(245,158,11,0.06));
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
            text-align: center;
        }
        .cta-section h2 {
            font-size: 2.2rem;
            margin-bottom: 16px;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto 32px;
        }
        .cta-buttons {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 18px;
            flex-wrap: wrap;
        }
        .cta-buttons .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 40px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            border-radius: var(--radius-md);
            font-weight: 700;
            font-size: 1.05rem;
            box-shadow: 0 6px 25px rgba(124,58,237,0.3);
            transition: var(--transition);
        }
        .cta-buttons .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(124,58,237,0.4);
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
            color: #fff;
        }
        .cta-buttons .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 36px;
            background: transparent;
            color: var(--text-primary);
            border: 2px solid var(--border-color);
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 1.05rem;
            transition: var(--transition);
        }
        .cta-buttons .btn-secondary:hover {
            border-color: var(--primary);
            color: var(--primary-light);
            background: rgba(124,58,237,0.05);
            transform: translateY(-3px);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: rgba(10, 10, 26, 0.95);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid var(--border-color);
        }
        .footer-brand .logo {
            margin-bottom: 16px;
            font-size: 1.3rem;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin: 0;
        }
        .footer-col h4 {
            font-size: 1rem;
            margin-bottom: 18px;
            color: var(--accent);
            font-weight: 600;
        }
        .footer-col a {
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--text-muted);
            font-size: 0.9rem;
            padding: 6px 0;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: var(--accent);
            transform: translateX(4px);
        }
        .footer-col a i { width: 18px; font-size: 0.85rem; }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            padding: 24px 0;
        }
        .footer-bottom p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin: 0;
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            color: var(--text-muted);
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-3px);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .article-hero h1 { font-size: 2.4rem; }
        }

        @media (max-width: 768px) {
            .nav-desktop { display: none; }
            .nav-toggle { display: block; }
            .mobile-nav { display: flex; }

            .article-hero { padding: 120px 0 40px; }
            .article-hero h1 { font-size: 1.9rem; }
            .article-hero p { font-size: 1rem; }
            .article-main .article-body { padding: 28px 20px; }
            .article-body p { font-size: 1rem; }

            .related-grid { grid-template-columns: 1fr; }
            .related-card .card-img { height: 180px; }

            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }

            .cta-section h2 { font-size: 1.8rem; }
            .cta-buttons .btn-primary,
            .cta-buttons .btn-secondary { width: 100%; justify-content: center; }

            .faq-item .faq-question { font-size: 0.95rem; padding: 16px 20px; }
            .faq-item .faq-answer p { padding: 0 20px 16px; font-size: 0.9rem; }

            .article-tags { flex-direction: column; align-items: flex-start; }
            .article-hero .article-meta { font-size: 0.8rem; gap: 10px; }
            .sidebar-card { padding: 20px; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .article-hero h1 { font-size: 1.6rem; }
            .article-hero .article-meta { flex-direction: column; gap: 6px; }
            .article-main .article-body { padding: 20px 16px; border-radius: var(--radius-md); }
            .article-body h2 { font-size: 1.4rem; }
            .article-body h3 { font-size: 1.2rem; }
            .related-card .card-body { padding: 18px 18px 20px; }
            .cta-section { padding: 50px 0; }
            .cta-section h2 { font-size: 1.5rem; }
            .footer-bottom p { font-size: 0.78rem; }
            .logo { font-size: 1.2rem; }
            .logo i { font-size: 1.4rem; }
            .article-not-found { padding: 40px 20px; }
            .article-not-found i { font-size: 3rem; }
        }

        /* ===== Accessibility ===== */
        a:focus-visible, button:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
            border-radius: 4px;
        }
        @media (prefers-reduced-motion: reduce) {
            *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1e2a4a;
            --primary-light: #2a3d6b;
            --primary-dark: #0f1729;
            --accent: #f5a623;
            --accent-light: #f7c35a;
            --accent-dark: #d4891a;
            --secondary: #e8491d;
            --secondary-light: #f05a2e;
            --bg: #f8f9fc;
            --bg-alt: #edf0f7;
            --bg-dark: #0f1729;
            --text: #1e2a4a;
            --text-light: #5a6a8a;
            --text-muted: #8a9bb8;
            --text-inverse: #ffffff;
            --border: #dce1ec;
            --border-light: #e8ecf3;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(30, 42, 74, 0.06);
            --shadow-md: 0 8px 28px rgba(30, 42, 74, 0.08);
            --shadow-lg: 0 16px 48px rgba(30, 42, 74, 0.12);
            --shadow-xl: 0 24px 64px rgba(30, 42, 74, 0.16);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --transition: all 0.25s 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-family);
            background: var(--bg);
            color: var(--text);
            line-height: 1.6;
            font-size: 16px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.25;
            color: var(--text);
        }
        h1 {
            font-size: clamp(2rem, 5vw, 3.2rem);
        }
        h2 {
            font-size: clamp(1.6rem, 3.5vw, 2.4rem);
        }
        h3 {
            font-size: clamp(1.2rem, 2.5vw, 1.6rem);
        }
        h4 {
            font-size: 1.1rem;
        }
        p {
            margin-bottom: 1rem;
        }

        /* ===== 容器 ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: var(--transition);
            border: 2px solid transparent;
            background: var(--accent);
            color: var(--primary-dark);
            box-shadow: 0 4px 14px rgba(245, 166, 35, 0.3);
        }
        .btn:hover {
            background: var(--accent-light);
            color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(245, 166, 35, 0.35);
        }
        .btn:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(245, 166, 35, 0.2);
        }
        .btn:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }
        .btn-secondary {
            background: transparent;
            color: var(--text-inverse);
            border-color: rgba(255, 255, 255, 0.35);
            box-shadow: none;
        }
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: rgba(255, 255, 255, 0.6);
            color: var(--text-inverse);
            box-shadow: none;
        }
        .btn-ghost {
            background: transparent;
            color: var(--primary);
            border-color: var(--border);
            box-shadow: none;
        }
        .btn-ghost:hover {
            background: var(--bg-alt);
            border-color: var(--primary-light);
            color: var(--primary);
            box-shadow: none;
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 0.85rem;
        }
        .btn-lg {
            padding: 16px 36px;
            font-size: 1.05rem;
        }
        .btn .fa-arrow-right {
            transition: var(--transition);
        }
        .btn:hover .fa-arrow-right {
            transform: translateX(4px);
        }

        /* ===== 徽章 ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.78rem;
            font-weight: 600;
            background: rgba(245, 166, 35, 0.15);
            color: var(--accent-dark);
            border: 1px solid rgba(245, 166, 35, 0.25);
        }
        .badge-primary {
            background: rgba(30, 42, 74, 0.08);
            color: var(--primary);
            border-color: rgba(30, 42, 74, 0.12);
        }
        .badge-success {
            background: rgba(52, 199, 89, 0.12);
            color: #2c8f4a;
            border-color: rgba(52, 199, 89, 0.2);
        }

        /* ===== 标签 ===== */
        .tag {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 4px;
            font-size: 0.75rem;
            font-weight: 500;
            background: var(--bg-alt);
            color: var(--text-light);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .tag:hover {
            background: var(--primary);
            color: var(--text-inverse);
            border-color: var(--primary);
        }

        /* ===== Header / 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(15, 23, 41, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: var(--transition);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-inverse);
            letter-spacing: -0.5px;
        }
        .logo i {
            font-size: 1.5rem;
            color: var(--accent);
            background: rgba(245, 166, 35, 0.15);
            padding: 8px;
            border-radius: 12px;
        }
        .logo span {
            color: var(--accent);
        }
        .logo:hover {
            color: var(--text-inverse);
        }
        .nav-desktop {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-desktop a {
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.7);
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-desktop a i {
            font-size: 0.85rem;
        }
        .nav-desktop a:hover {
            color: var(--text-inverse);
            background: rgba(255, 255, 255, 0.08);
        }
        .nav-desktop a.active {
            color: var(--text-inverse);
            background: rgba(245, 166, 35, 0.18);
            font-weight: 600;
        }
        .nav-desktop a.nav-cta {
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 700;
            padding: 8px 24px;
            box-shadow: 0 4px 14px rgba(245, 166, 35, 0.25);
        }
        .nav-desktop a.nav-cta:hover {
            background: var(--accent-light);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(245, 166, 35, 0.35);
        }
        .nav-toggle {
            display: none;
            background: transparent;
            color: var(--text-inverse);
            font-size: 1.5rem;
            padding: 6px 10px;
            border-radius: 8px;
            cursor: pointer;
            border: 1px solid rgba(255, 255, 255, 0.12);
        }
        .nav-toggle:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }
        .mobile-nav {
            display: none;
            position: absolute;
            top: var(--header-height);
            left: 0;
            right: 0;
            background: rgba(15, 23, 41, 0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            padding: 12px 20px 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            flex-direction: column;
            gap: 4px;
        }
        .mobile-nav a {
            padding: 12px 16px;
            border-radius: 12px;
            font-size: 0.95rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.7);
            display: flex;
            align-items: center;
            gap: 10px;
            transition: var(--transition);
        }
        .mobile-nav a i {
            width: 20px;
            font-size: 0.9rem;
        }
        .mobile-nav a:hover {
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-inverse);
        }
        .mobile-nav a.active {
            color: var(--accent);
            background: rgba(245, 166, 35, 0.1);
        }
        .mobile-nav a.nav-cta {
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 700;
            margin-top: 8px;
            text-align: center;
            justify-content: center;
        }
        .mobile-nav.open {
            display: flex;
        }

        @media (max-width: 820px) {
            .nav-desktop {
                display: none;
            }
            .nav-toggle {
                display: block;
            }
        }
        @media (min-width: 821px) {
            .mobile-nav {
                display: none !important;
            }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 520px;
            display: flex;
            align-items: center;
            padding: 120px 0 80px;
            background: var(--bg-dark);
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.3;
            transform: scale(1.05);
            transition: transform 8s ease;
        }
        .hero:hover .hero-bg {
            transform: scale(1);
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 41, 0.88) 30%, rgba(15, 23, 41, 0.5) 70%, rgba(15, 23, 41, 0.3) 100%);
        }
        .hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            background: rgba(245, 166, 35, 0.15);
            color: var(--accent);
            border: 1px solid rgba(245, 166, 35, 0.2);
            margin-bottom: 20px;
            letter-spacing: 0.3px;
        }
        .hero h1 {
            color: var(--text-inverse);
            margin-bottom: 16px;
            max-width: 800px;
            margin-left: auto;
            margin-right: auto;
        }
        .hero h1 i {
            color: var(--accent);
        }
        .hero p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 1.1rem;
            max-width: 640px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
            align-items: center;
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 32px 48px;
            justify-content: center;
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }
        .hero-stat {
            text-align: center;
        }
        .hero-stat-number {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--text-inverse);
        }
        .hero-stat-number span {
            color: var(--accent);
        }
        .hero-stat-label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
            margin-top: 2px;
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-inverse);
        }
        .section-dark h2,
        .section-dark h3,
        .section-dark h4 {
            color: var(--text-inverse);
        }
        .section-header {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 48px;
        }
        .section-header h2 {
            margin-bottom: 12px;
        }
        .section-header p {
            color: var(--text-light);
            font-size: 1.05rem;
        }
        .section-dark .section-header p {
            color: rgba(255, 255, 255, 0.6);
        }
        .section-subtitle {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 16px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            background: rgba(245, 166, 35, 0.12);
            color: var(--accent-dark);
            margin-bottom: 12px;
            letter-spacing: 0.3px;
        }
        .section-dark .section-subtitle {
            background: rgba(245, 166, 35, 0.15);
            color: var(--accent);
        }

        /* ===== 功能卡片 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 24px;
        }
        .feature-card {
            background: var(--text-inverse);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: var(--accent);
            opacity: 0;
            transition: var(--transition);
        }
        .feature-card:hover::before {
            opacity: 1;
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: rgba(245, 166, 35, 0.2);
        }
        .feature-card-icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            margin-bottom: 18px;
            background: rgba(245, 166, 35, 0.1);
            color: var(--accent-dark);
        }
        .feature-card-icon.icon-blue {
            background: rgba(30, 42, 74, 0.08);
            color: var(--primary);
        }
        .feature-card-icon.icon-green {
            background: rgba(52, 199, 89, 0.1);
            color: #2c8f4a;
        }
        .feature-card-icon.icon-red {
            background: rgba(232, 73, 29, 0.08);
            color: var(--secondary);
        }
        .feature-card h3 {
            margin-bottom: 10px;
            font-size: 1.15rem;
        }
        .feature-card p {
            color: var(--text-light);
            font-size: 0.92rem;
            margin-bottom: 16px;
        }
        .feature-card .tag {
            font-size: 0.7rem;
        }
        .feature-card-img {
            margin: 20px -8px 0;
            border-radius: var(--radius-sm);
            overflow: hidden;
        }
        .feature-card-img img {
            width: 100%;
            height: 160px;
            object-fit: cover;
            transition: var(--transition);
        }
        .feature-card:hover .feature-card-img img {
            transform: scale(1.04);
        }

        /* ===== 场景卡片 ===== */
        .scenarios-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 20px;
        }
        .scenario-card {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            min-height: 260px;
            display: flex;
            align-items: flex-end;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .scenario-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .scenario-card img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .scenario-card:hover img {
            transform: scale(1.06);
        }
        .scenario-card-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(0deg, rgba(15, 23, 41, 0.85) 20%, rgba(15, 23, 41, 0.1) 70%);
        }
        .scenario-card-content {
            position: relative;
            z-index: 2;
            padding: 24px 20px;
            width: 100%;
        }
        .scenario-card-content h4 {
            color: var(--text-inverse);
            margin-bottom: 4px;
            font-size: 1.1rem;
        }
        .scenario-card-content p {
            color: rgba(255, 255, 255, 0.65);
            font-size: 0.85rem;
            margin-bottom: 0;
        }
        .scenario-card-tag {
            position: absolute;
            top: 16px;
            right: 16px;
            z-index: 3;
            padding: 4px 12px;
            border-radius: 50px;
            font-size: 0.7rem;
            font-weight: 600;
            background: rgba(245, 166, 35, 0.9);
            color: var(--primary-dark);
        }

        /* ===== 流程步骤 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 32px;
            counter-reset: step;
        }
        .step-item {
            text-align: center;
            counter-increment: step;
            position: relative;
        }
        .step-item::before {
            content: counter(step);
            display: block;
            width: 48px;
            height: 48px;
            line-height: 48px;
            border-radius: 50%;
            background: var(--accent);
            color: var(--primary-dark);
            font-size: 1.2rem;
            font-weight: 800;
            margin: 0 auto 16px;
            box-shadow: 0 4px 14px rgba(245, 166, 35, 0.25);
        }
        .step-item h4 {
            margin-bottom: 8px;
            font-size: 1.05rem;
        }
        .step-item p {
            color: var(--text-light);
            font-size: 0.9rem;
            margin-bottom: 0;
        }
        .step-item:not(:last-child)::after {
            content: '→';
            position: absolute;
            right: -20px;
            top: 12px;
            font-size: 1.8rem;
            color: var(--accent);
            opacity: 0.4;
            font-weight: 300;
        }
        @media (max-width: 768px) {
            .steps-grid {
                gap: 28px;
            }
            .step-item:not(:last-child)::after {
                display: none;
            }
        }

        /* ===== 数据统计 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            gap: 24px;
            text-align: center;
        }
        .stat-item {
            padding: 28px 16px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-md);
            border: 1px solid rgba(255, 255, 255, 0.06);
            transition: var(--transition);
        }
        .stat-item:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-2px);
        }
        .stat-item .number {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
        }
        .stat-item .label {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.55);
            margin-top: 6px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--text-inverse);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(245, 166, 35, 0.2);
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            cursor: pointer;
            font-weight: 600;
            font-size: 0.98rem;
            gap: 12px;
            user-select: none;
            transition: var(--transition);
        }
        .faq-question:hover {
            background: rgba(245, 166, 35, 0.03);
        }
        .faq-question i {
            color: var(--accent);
            font-size: 0.9rem;
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 24px;
            color: var(--text-light);
            font-size: 0.92rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 18px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-dark);
            position: relative;
            overflow: hidden;
        }
        .cta-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.12;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 80px 24px;
        }
        .cta-section h2 {
            color: var(--text-inverse);
            margin-bottom: 12px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.65);
            font-size: 1.05rem;
            max-width: 540px;
            margin: 0 auto 32px;
        }
        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .cta-section .btn {
            font-size: 1.05rem;
            padding: 16px 36px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 56px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-brand .logo {
            margin-bottom: 14px;
            font-size: 1.2rem;
        }
        .footer-brand p {
            font-size: 0.88rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.5);
            max-width: 360px;
        }
        .footer-col h4 {
            color: var(--text-inverse);
            font-size: 0.95rem;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .footer-col a {
            display: block;
            padding: 4px 0;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.5);
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-col a i {
            width: 20px;
            color: var(--accent);
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 0;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.35);
        }
        .footer-bottom p {
            margin-bottom: 0;
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(255, 255, 255, 0.06);
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.95rem;
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--accent);
            color: var(--primary-dark);
            transform: translateY(-2px);
        }

        @media (max-width: 900px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== 响应式微调 ===== */
        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .hero {
                min-height: 420px;
                padding: 100px 0 60px;
            }
            .hero p {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 20px 32px;
                margin-top: 32px;
                padding-top: 24px;
            }
            .hero-stat-number {
                font-size: 1.4rem;
            }
            .features-grid {
                grid-template-columns: 1fr 1fr;
            }
            .scenarios-grid {
                grid-template-columns: 1fr 1fr;
            }
            .section-header {
                margin-bottom: 32px;
            }
            .cta-section .container {
                padding: 56px 16px;
            }
        }
        @media (max-width: 520px) {
            .features-grid {
                grid-template-columns: 1fr;
            }
            .scenarios-grid {
                grid-template-columns: 1fr;
            }
            .hero {
                min-height: 360px;
                padding: 80px 0 40px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn {
                width: 100%;
                justify-content: center;
            }
            .cta-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .cta-actions .btn {
                width: 100%;
                justify-content: center;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 380px) {
            .stats-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 工具类 ===== */
        .text-center {
            text-align: center;
        }
        .mt-12 {
            margin-top: 12px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .mb-12 {
            margin-bottom: 12px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }
        .gap-16 {
            gap: 16px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .flex-wrap {
            display: flex;
            flex-wrap: wrap;
        }