/* roulang page: index */
/* ===== Design Variables ===== */
:root {
  --clr-primary: #7c3aed;
  --clr-primary-light: #8b5cf6;
  --clr-primary-dark: #5b21b6;
  --clr-accent: #06b6d4;
  --clr-accent-light: #22d3ee;
  --clr-accent-dark: #0891b2;
  --clr-bg: #0b0b1a;
  --clr-bg-alt: #111128;
  --clr-bg-card: #17173a;
  --clr-bg-card-hover: #1e1e4a;
  --clr-surface: #1a1a3e;
  --clr-text: #f1f5f9;
  --clr-text-muted: #94a3b8;
  --clr-text-dim: #64748b;
  --clr-border: rgba(124, 58, 237, 0.25);
  --clr-border-light: rgba(6, 182, 212, 0.2);
  --clr-success: #10b981;
  --clr-warning: #f59e0b;
  --clr-error: #ef4444;
  --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(124,58,237,0.15);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --container-max: 1200px;
  --header-h: 72px;
}

/* ===== 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);
  background: var(--clr-bg);
  color: var(--clr-text);
  line-height: 1.7;
  font-size: 16px;
}
a { color: var(--clr-accent-light); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--clr-primary-light); }
img { max-width: 100%; height: auto; display: block; }
button, input, textarea { font-family: inherit; font-size: inherit; }
button { cursor: pointer; border: none; background: none; color: inherit; }
ul, ol { list-style: none; }

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

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 700; color: var(--clr-text); }
h1 { font-size: clamp(2.2rem, 5.5vw, 4rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.6rem); letter-spacing: -0.01em; }
h3 { font-size: clamp(1.2rem, 2.2vw, 1.6rem); }
h4 { font-size: 1.15rem; }
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--clr-accent-light);
  margin-bottom: 10px;
}
.section-label::before {
  content: '';
  width: 24px;
  height: 2px;
  background: var(--clr-accent);
  border-radius: 2px;
}
.section-title { margin-bottom: 12px; }
.section-sub {
  color: var(--clr-text-muted);
  max-width: 640px;
  font-size: 1.05rem;
  line-height: 1.7;
}
.text-center { text-align: center; }
.text-muted { color: var(--clr-text-muted); }

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  transition: all var(--transition);
  border: 2px solid transparent;
  white-space: nowrap;
}
.btn-primary {
  background: var(--clr-primary);
  color: #fff !important;
  border-color: var(--clr-primary);
  box-shadow: 0 4px 20px rgba(124,58,237,0.3);
}
.btn-primary:hover {
  background: var(--clr-primary-light);
  border-color: var(--clr-primary-light);
  box-shadow: 0 8px 30px rgba(124,58,237,0.4);
  transform: translateY(-2px);
}
.btn-primary:active { transform: translateY(0); box-shadow: 0 2px 10px rgba(124,58,237,0.2); }
.btn-outline {
  background: transparent;
  color: var(--clr-text) !important;
  border-color: var(--clr-border);
}
.btn-outline:hover {
  border-color: var(--clr-primary-light);
  background: rgba(124,58,237,0.08);
  transform: translateY(-2px);
}
.btn-outline:active { transform: translateY(0); }
.btn-accent {
  background: var(--clr-accent);
  color: #0b0b1a !important;
  border-color: var(--clr-accent);
  box-shadow: 0 4px 20px rgba(6,182,212,0.25);
}
.btn-accent:hover {
  background: var(--clr-accent-light);
  border-color: var(--clr-accent-light);
  box-shadow: 0 8px 30px rgba(6,182,212,0.35);
  transform: translateY(-2px);
}
.btn-sm { padding: 10px 20px; font-size: 0.85rem; border-radius: var(--radius-sm); }
.btn-icon { width: 44px; height: 44px; padding: 0; justify-content: center; border-radius: 50%; }

/* ===== Badge / Tag ===== */
.badge {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  background: rgba(124,58,237,0.15);
  color: var(--clr-primary-light);
  border: 1px solid rgba(124,58,237,0.2);
}
.badge-accent {
  background: rgba(6,182,212,0.12);
  color: var(--clr-accent-light);
  border-color: rgba(6,182,212,0.2);
}
.badge-success {
  background: rgba(16,185,129,0.12);
  color: var(--clr-success);
  border-color: rgba(16,185,129,0.2);
}
.tag {
  display: inline-block;
  padding: 2px 12px;
  border-radius: 50px;
  font-size: 0.7rem;
  font-weight: 500;
  background: rgba(255,255,255,0.06);
  color: var(--clr-text-muted);
  border: 1px solid rgba(255,255,255,0.06);
}

/* ===== Header & Nav ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-h);
  background: rgba(11,11,26,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(124,58,237,0.08);
  transition: background var(--transition), border-color var(--transition);
}
.site-header.scrolled {
  background: rgba(11,11,26,0.96);
  border-color: rgba(124,58,237,0.15);
}
.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(--clr-text) !important;
  letter-spacing: -0.02em;
}
.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
}
.logo span { color: var(--clr-accent-light); }
.nav-list {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-list a {
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--clr-text-muted) !important;
  transition: all var(--transition);
  position: relative;
}
.nav-list a:hover {
  color: var(--clr-text) !important;
  background: rgba(255,255,255,0.04);
}
.nav-list a.active {
  color: var(--clr-text) !important;
  background: rgba(124,58,237,0.12);
}
.nav-list a.active::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: var(--clr-primary-light);
}
.nav-cta {
  background: var(--clr-primary) !important;
  color: #fff !important;
  padding: 8px 22px !important;
  border-radius: var(--radius-sm) !important;
  font-weight: 600 !important;
}
.nav-cta:hover {
  background: var(--clr-primary-light) !important;
  transform: translateY(-1px);
}
.mobile-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: var(--clr-text);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  background: transparent;
  transition: all var(--transition);
}
.mobile-toggle:hover { border-color: var(--clr-primary-light); color: var(--clr-primary-light); }
@media (max-width: 768px) {
  .nav-list {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: rgba(11,11,26,0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 20px 24px 30px;
    gap: 6px;
    border-bottom: 1px solid var(--clr-border);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: all 0.4s cubic-bezier(0.4,0,0.2,1);
  }
  .nav-list.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }
  .nav-list a { width: 100%; padding: 12px 18px; }
  .nav-list a.active::after { display: none; }
  .nav-list a.active { background: rgba(124,58,237,0.15); }
  .mobile-toggle { display: flex; }
}

/* ===== Hero ===== */
.hero {
  padding: 140px 0 80px;
  min-height: 90vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  background: var(--clr-bg);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  opacity: 0.2;
  z-index: 1;
}
.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(11,11,26,0.85) 0%, rgba(11,11,26,0.4) 50%, rgba(11,11,26,0.85) 100%);
}
.hero-glow {
  position: absolute;
  top: -20%;
  right: -10%;
  width: 70%;
  height: 80%;
  background: radial-gradient(ellipse at center, rgba(124,58,237,0.12) 0%, transparent 70%);
  z-index: 1;
  pointer-events: none;
}
.hero .container { position: relative; z-index: 2; }
.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.hero-content { max-width: 600px; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(6,182,212,0.1);
  border: 1px solid rgba(6,182,212,0.2);
  padding: 6px 18px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--clr-accent-light);
  margin-bottom: 24px;
}
.hero-badge i { font-size: 0.7rem; }
.hero h1 { margin-bottom: 20px; }
.hero h1 .highlight {
  background: linear-gradient(135deg, var(--clr-primary-light), var(--clr-accent-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: 1.1rem;
  color: var(--clr-text-muted);
  margin-bottom: 32px;
  max-width: 520px;
  line-height: 1.8;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  background: var(--clr-bg-alt);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  backdrop-filter: blur(10px);
}
.stat-item { text-align: center; }
.stat-number {
  font-size: 2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--clr-primary-light), var(--clr-accent-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}
.stat-label { font-size: 0.8rem; color: var(--clr-text-dim); margin-top: 4px; font-weight: 500; }
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-stats { max-width: 480px; }
  .hero { padding: 120px 0 60px; min-height: auto; }
}
@media (max-width: 520px) {
  .hero-stats { grid-template-columns: 1fr; gap: 16px; padding: 24px 20px; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }
}

/* ===== Section Shared ===== */
.section { padding: 80px 0; }
.section-alt { background: var(--clr-bg-alt); }
.section-header { margin-bottom: 48px; }
.section-header.text-center .section-sub { margin-left: auto; margin-right: auto; }

/* ===== Feature / Intro ===== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.feature-card {
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: all var(--transition);
}
.feature-card:hover {
  background: var(--clr-bg-card-hover);
  border-color: rgba(124,58,237,0.3);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}
.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 20px;
  background: rgba(124,58,237,0.12);
  color: var(--clr-primary-light);
}
.feature-icon.accent { background: rgba(6,182,212,0.1); color: var(--clr-accent-light); }
.feature-icon.success { background: rgba(16,185,129,0.1); color: var(--clr-success); }
.feature-card h3 { margin-bottom: 10px; font-size: 1.15rem; }
.feature-card p { color: var(--clr-text-muted); font-size: 0.92rem; line-height: 1.7; }
@media (max-width: 768px) {
  .feature-grid { grid-template-columns: 1fr; }
}

/* ===== Category / Topic ===== */
.topic-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}
.topic-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}
.topic-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
  border-color: rgba(124,58,237,0.3);
}
.topic-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
}
.topic-body { padding: 24px 28px; flex: 1; display: flex; flex-direction: column; }
.topic-body h3 { margin-bottom: 8px; }
.topic-body p { color: var(--clr-text-muted); font-size: 0.92rem; line-height: 1.7; margin-bottom: 16px; flex: 1; }
.topic-meta { display: flex; align-items: center; gap: 12px; font-size: 0.8rem; color: var(--clr-text-dim); }
.topic-meta i { font-size: 0.75rem; }
@media (max-width: 768px) {
  .topic-grid { grid-template-columns: 1fr; }
  .topic-img { height: 180px; }
}

/* ===== CMS News List ===== */
.news-list { display: flex; flex-direction: column; gap: 16px; }
.news-item {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  transition: all var(--transition);
}
.news-item:hover {
  background: var(--clr-bg-card-hover);
  border-color: rgba(124,58,237,0.25);
  transform: translateX(4px);
}
.news-item .badge { flex-shrink: 0; margin-top: 2px; }
.news-content { flex: 1; min-width: 0; }
.news-content h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 4px;
  line-height: 1.4;
}
.news-content h4 a { color: var(--clr-text) !important; }
.news-content h4 a:hover { color: var(--clr-primary-light) !important; }
.news-content p {
  font-size: 0.88rem;
  color: var(--clr-text-muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-foot {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 8px;
  font-size: 0.78rem;
  color: var(--clr-text-dim);
}
.news-foot i { font-size: 0.7rem; margin-right: 4px; }
.news-empty {
  text-align: center;
  padding: 40px 20px;
  color: var(--clr-text-muted);
  background: var(--clr-bg-card);
  border-radius: var(--radius-md);
  border: 1px dashed var(--clr-border);
}
@media (max-width: 640px) {
  .news-item { flex-direction: column; gap: 12px; padding: 16px; }
}

/* ===== Data / Stats Block ===== */
.data-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.data-card {
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  padding: 28px 20px;
  text-align: center;
  transition: all var(--transition);
}
.data-card:hover {
  transform: translateY(-3px);
  border-color: rgba(6,182,212,0.25);
  box-shadow: 0 8px 30px rgba(6,182,212,0.06);
}
.data-number {
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1.2;
  color: var(--clr-text);
}
.data-number.primary { color: var(--clr-primary-light); }
.data-number.accent { color: var(--clr-accent-light); }
.data-number.success { color: var(--clr-success); }
.data-label { font-size: 0.85rem; color: var(--clr-text-dim); margin-top: 6px; }
@media (max-width: 768px) {
  .data-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .data-grid { grid-template-columns: 1fr; }
}

/* ===== Process / Steps ===== */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  counter-reset: step;
}
.step-card {
  text-align: center;
  padding: 36px 24px;
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  position: relative;
  transition: all var(--transition);
}
.step-card:hover {
  background: var(--clr-bg-card-hover);
  border-color: rgba(124,58,237,0.25);
  transform: translateY(-3px);
}
.step-num {
  counter-increment: step;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 700;
  color: #fff;
  margin: 0 auto 18px;
}
.step-card h3 { font-size: 1.1rem; margin-bottom: 8px; }
.step-card p { color: var(--clr-text-muted); font-size: 0.9rem; line-height: 1.7; }
@media (max-width: 768px) {
  .steps-grid { grid-template-columns: 1fr; gap: 20px; }
}

/* ===== FAQ ===== */
.faq-list { max-width: 820px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition);
}
.faq-item:hover { border-color: rgba(124,58,237,0.2); }
.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  user-select: none;
  transition: background var(--transition);
  gap: 12px;
}
.faq-q:hover { background: rgba(255,255,255,0.02); }
.faq-q i { font-size: 0.8rem; color: var(--clr-text-dim); transition: transform var(--transition); }
.faq-item.open .faq-q i { transform: rotate(180deg); color: var(--clr-accent-light); }
.faq-a {
  padding: 0 24px 18px;
  font-size: 0.9rem;
  color: var(--clr-text-muted);
  line-height: 1.8;
  display: none;
}
.faq-item.open .faq-a { display: block; }
@media (max-width: 640px) {
  .faq-q { padding: 14px 16px; font-size: 0.9rem; }
  .faq-a { padding: 0 16px 14px; }
}

/* ===== CTA ===== */
.cta-block {
  background: linear-gradient(135deg, rgba(124,58,237,0.08), rgba(6,182,212,0.06));
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  padding: 60px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-block::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -30%;
  width: 60%;
  height: 200%;
  background: radial-gradient(ellipse at center, rgba(124,58,237,0.06) 0%, transparent 70%);
  pointer-events: none;
}
.cta-block h2 { margin-bottom: 12px; }
.cta-block p { color: var(--clr-text-muted); max-width: 520px; margin: 0 auto 28px; font-size: 1.05rem; }
.cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; position: relative; z-index: 2; }
@media (max-width: 640px) {
  .cta-block { padding: 40px 24px; }
  .cta-actions { flex-direction: column; align-items: center; }
  .cta-actions .btn { width: 100%; max-width: 300px; justify-content: center; }
}

/* ===== Footer ===== */
.site-footer {
  background: var(--clr-bg-alt);
  border-top: 1px solid var(--clr-border);
  padding: 52px 0 28px;
  margin-top: 80px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 36px;
}
.footer-brand .logo { margin-bottom: 14px; }
.footer-brand p { color: var(--clr-text-muted); font-size: 0.88rem; max-width: 320px; line-height: 1.7; }
.footer-col h4 { font-size: 0.9rem; font-weight: 600; margin-bottom: 16px; color: var(--clr-text); }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul a {
  color: var(--clr-text-muted) !important;
  font-size: 0.88rem;
  transition: all var(--transition);
}
.footer-col ul a:hover { color: var(--clr-primary-light) !important; padding-left: 4px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.04);
  padding-top: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.82rem;
  color: var(--clr-text-dim);
}
.footer-bottom a { color: var(--clr-text-dim) !important; }
.footer-bottom a:hover { color: var(--clr-text-muted) !important; }
.footer-socials { display: flex; gap: 12px; }
.footer-socials a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.04);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-text-dim) !important;
  font-size: 0.9rem;
  transition: all var(--transition);
  border: 1px solid transparent;
}
.footer-socials a:hover {
  background: rgba(124,58,237,0.12);
  color: var(--clr-primary-light) !important;
  border-color: rgba(124,58,237,0.2);
}
@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 520px) {
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--clr-bg); }
::-webkit-scrollbar-thumb { background: var(--clr-border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(124,58,237,0.3); }

/* ===== Focus ===== */
a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2px solid var(--clr-accent-light);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ===== Animations ===== */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Responsive Helpers ===== */
@media (max-width: 1024px) {
  .section { padding: 60px 0; }
}
@media (max-width: 768px) {
  .section { padding: 48px 0; }
  .section-header { margin-bottom: 32px; }
}

/* roulang page: article */
/* ===== CSS Design Variables ===== */
        :root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #3b82f6;
            --primary-bg: #eff6ff;
            --secondary: #0f172a;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --bg: #ffffff;
            --bg-alt: #f8fafc;
            --bg-dark: #0f172a;
            --text: #1e293b;
            --text-light: #64748b;
            --text-white: #f1f5f9;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 24px rgba(0,0,0,0.06);
            --shadow-lg: 0 12px 48px rgba(0,0,0,0.10);
            --shadow-hover: 0 8px 32px rgba(37,99,235,0.12);
            --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --max-width: 1200px;
            --nav-height: 72px;
        }

        /* ===== 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);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
        }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--primary-dark); }
        img { max-width: 100%; height: auto; display: block; }
        ul, ol { list-style: none; }
        button, input, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; }
        button { cursor: pointer; background: none; }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            height: var(--nav-height);
            display: flex;
            align-items: center;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: var(--secondary);
            letter-spacing: -0.5px;
        }
        .logo .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 800;
        }
        .logo span { color: var(--primary); font-weight: 800; }
        .logo:hover { color: var(--secondary); }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-list li a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
            transition: all var(--transition);
            position: relative;
        }
        .nav-list li a::after {
            content: '';
            position: absolute;
            left: 18px;
            right: 18px;
            bottom: 4px;
            height: 2px;
            background: var(--primary);
            transform: scaleX(0);
            transition: transform var(--transition);
            border-radius: 2px;
        }
        .nav-list li a:hover::after,
        .nav-list li a.active::after { transform: scaleX(1); }
        .nav-list li a:hover { color: var(--primary); background: var(--primary-bg); }
        .nav-list li a.active { color: var(--primary); font-weight: 600; }
        .nav-list li a.nav-cta {
            background: var(--primary);
            color: #fff;
            padding: 10px 24px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 8px;
            box-shadow: 0 4px 12px rgba(37,99,235,0.25);
        }
        .nav-list li a.nav-cta::after { display: none; }
        .nav-list li a.nav-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(37,99,235,0.35);
        }
        .nav-toggle {
            display: none;
            font-size: 24px;
            color: var(--text);
            padding: 8px;
            border-radius: var(--radius-sm);
            background: var(--bg-alt);
        }

        /* ===== Article Hero / Banner ===== */
        .article-banner {
            position: relative;
            padding: 80px 0 60px;
            background: var(--secondary);
            background-image: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
            overflow: hidden;
            min-height: 300px;
            display: flex;
            align-items: center;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.12;
            mix-blend-mode: overlay;
        }
        .article-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .article-banner .breadcrumb {
            display: flex;
            justify-content: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255,255,255,0.6);
            margin-bottom: 20px;
        }
        .article-banner .breadcrumb a { color: rgba(255,255,255,0.7); }
        .article-banner .breadcrumb a:hover { color: #fff; }
        .article-banner .breadcrumb span { color: rgba(255,255,255,0.4); }
        .article-banner h1 {
            font-size: clamp(28px, 4vw, 48px);
            font-weight: 800;
            color: #fff;
            line-height: 1.25;
            max-width: 800px;
            margin: 0 auto 16px;
            letter-spacing: -0.5px;
        }
        .article-banner .meta {
            display: flex;
            justify-content: center;
            gap: 24px;
            font-size: 15px;
            color: rgba(255,255,255,0.7);
            flex-wrap: wrap;
        }
        .article-banner .meta i { margin-right: 6px; }
        .article-banner .meta .category-tag {
            background: var(--primary);
            color: #fff;
            padding: 2px 14px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
        }

        /* ===== Article Content ===== */
        .article-main {
            padding: 60px 0 80px;
            background: var(--bg);
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
            align-items: start;
        }
        .article-body {
            background: var(--bg);
            border-radius: var(--radius);
            padding: 40px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }
        .article-body .content {
            font-size: 17px;
            line-height: 1.9;
            color: var(--text);
        }
        .article-body .content p { margin-bottom: 20px; }
        .article-body .content h2, 
        .article-body .content h3 { 
            margin-top: 40px; 
            margin-bottom: 16px; 
            font-weight: 700; 
            color: var(--secondary); 
        }
        .article-body .content h2 { font-size: 26px; }
        .article-body .content h3 { font-size: 20px; }
        .article-body .content img {
            border-radius: var(--radius-sm);
            margin: 24px 0;
            box-shadow: var(--shadow);
        }
        .article-body .content ul, 
        .article-body .content ol { 
            padding-left: 24px; 
            margin-bottom: 20px; 
        }
        .article-body .content ul { list-style: disc; }
        .article-body .content ol { list-style: decimal; }
        .article-body .content li { margin-bottom: 8px; }
        .article-body .content blockquote {
            border-left: 4px solid var(--primary);
            padding: 16px 24px;
            background: var(--primary-bg);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 24px 0;
            font-style: italic;
            color: var(--text-light);
        }
        .article-body .content a { color: var(--primary); text-decoration: underline; }
        .article-body .content a:hover { color: var(--primary-dark); }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 40px;
            padding-top: 28px;
            border-top: 1px solid var(--border);
        }
        .article-tags .tag {
            padding: 4px 16px;
            border-radius: 20px;
            background: var(--bg-alt);
            color: var(--text-light);
            font-size: 13px;
            font-weight: 500;
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .article-tags .tag:hover { background: var(--primary-bg); color: var(--primary); border-color: var(--primary); }
        .article-nav {
            display: flex;
            justify-content: space-between;
            margin-top: 40px;
            padding-top: 28px;
            border-top: 1px solid var(--border);
            gap: 16px;
            flex-wrap: wrap;
        }
        .article-nav a {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            border-radius: var(--radius-sm);
            background: var(--bg-alt);
            color: var(--text);
            font-size: 14px;
            font-weight: 500;
            border: 1px solid var(--border);
            transition: all var(--transition);
            max-width: 45%;
        }
        .article-nav a:hover { background: var(--primary-bg); color: var(--primary); border-color: var(--primary); }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }
        .sidebar-card {
            background: var(--bg);
            border-radius: var(--radius);
            padding: 28px 24px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }
        .sidebar-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 18px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--primary-bg);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h3 i { color: var(--primary); }
        .sidebar-related li {
            padding: 12px 0;
            border-bottom: 1px solid var(--border-light);
        }
        .sidebar-related li:last-child { border-bottom: none; }
        .sidebar-related a {
            display: flex;
            gap: 12px;
            align-items: flex-start;
            color: var(--text);
            font-size: 14px;
            line-height: 1.5;
            transition: all var(--transition);
        }
        .sidebar-related a:hover { color: var(--primary); }
        .sidebar-related .thumb {
            width: 64px;
            height: 48px;
            border-radius: 6px;
            object-fit: cover;
            flex-shrink: 0;
            background: var(--bg-alt);
        }
        .sidebar-related .info { flex: 1; }
        .sidebar-related .info .title { font-weight: 600; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .sidebar-related .info .date { font-size: 12px; color: var(--text-light); margin-top: 4px; }
        .sidebar-cta {
            text-align: center;
        }
        .sidebar-cta p { font-size: 14px; color: var(--text-light); margin-bottom: 16px; }
        .sidebar-cta .btn-block {
            display: block;
            width: 100%;
            padding: 12px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-weight: 600;
            text-align: center;
            transition: all var(--transition);
        }
        .sidebar-cta .btn-block:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: 0 6px 20px rgba(37,99,235,0.3); }

        /* ===== Not Found ===== */
        .not-found-box {
            text-align: center;
            padding: 80px 24px;
            background: var(--bg);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }
        .not-found-box i { font-size: 56px; color: var(--text-light); margin-bottom: 20px; }
        .not-found-box h2 { font-size: 28px; color: var(--text); margin-bottom: 12px; }
        .not-found-box p { color: var(--text-light); margin-bottom: 24px; }
        .not-found-box .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-weight: 600;
            transition: all var(--transition);
        }
        .not-found-box .btn-back:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: 0 6px 20px rgba(37,99,235,0.3); }

        /* ===== FAQ Section ===== */
        .faq-section {
            padding: 60px 0;
            background: var(--bg-alt);
        }
        .faq-section .section-title {
            text-align: center;
            font-size: 28px;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 40px;
        }
        .faq-grid {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover { border-color: var(--primary-light); box-shadow: var(--shadow); }
        .faq-question {
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
            transition: color var(--transition);
        }
        .faq-question i { color: var(--primary); transition: transform var(--transition); font-size: 14px; }
        .faq-question.open i { transform: rotate(180deg); }
        .faq-question:hover { color: var(--primary); }
        .faq-answer {
            padding: 0 24px 18px;
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.8;
            display: none;
        }
        .faq-answer.open { display: block; }

        /* ===== CTA Section ===== */
        .cta-section {
            padding: 60px 0;
            background: var(--secondary);
            background-image: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .cta-section h2 {
            font-size: clamp(24px, 3vw, 36px);
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .cta-section p {
            color: rgba(255,255,255,0.7);
            max-width: 640px;
            margin: 0 auto 28px;
            font-size: 16px;
        }
        .cta-section .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 40px;
            background: var(--accent);
            color: var(--secondary);
            border-radius: var(--radius-sm);
            font-size: 17px;
            font-weight: 700;
            transition: all var(--transition);
            box-shadow: 0 6px 24px rgba(245,158,11,0.3);
        }
        .cta-section .btn-cta:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 10px 32px rgba(245,158,11,0.4); }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.7);
            padding: 60px 0 0;
        }
        .site-footer .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .footer-brand .logo { color: #fff; font-size: 24px; margin-bottom: 16px; }
        .footer-brand .logo span { color: var(--primary-light); }
        .footer-brand p { font-size: 14px; line-height: 1.8; color: rgba(255,255,255,0.6); max-width: 320px; }
        .footer-col h4 { color: #fff; font-size: 16px; font-weight: 600; margin-bottom: 18px; }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a { color: rgba(255,255,255,0.6); font-size: 14px; transition: all var(--transition); }
        .footer-col ul li a:hover { color: var(--primary-light); padding-left: 4px; }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 24px 0;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 13px;
            color: rgba(255,255,255,0.5);
        }
        .footer-bottom a { color: rgba(255,255,255,0.6); }
        .footer-bottom a:hover { color: var(--primary-light); }
        .footer-socials { display: flex; gap: 12px; }
        .footer-socials a {
            width: 36px; height: 36px;
            border-radius: 50%;
            background: rgba(255,255,255,0.08);
            display: flex; align-items: center; justify-content: center;
            color: rgba(255,255,255,0.7);
            transition: all var(--transition);
            font-size: 16px;
        }
        .footer-socials a:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; }
            .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .nav-list { display: none; position: absolute; top: var(--nav-height); left: 0; right: 0; background: var(--bg); flex-direction: column; padding: 16px 24px; border-bottom: 1px solid var(--border); box-shadow: var(--shadow-lg); gap: 4px; }
            .nav-list.open { display: flex; }
            .nav-list li a { padding: 12px 16px; width: 100%; border-radius: var(--radius-sm); }
            .nav-list li a::after { display: none; }
            .nav-list li a.nav-cta { justify-content: center; }
            .nav-toggle { display: block; }
            .article-banner { padding: 60px 0 40px; min-height: 220px; }
            .article-banner h1 { font-size: 24px; }
            .article-banner .meta { gap: 12px; font-size: 13px; }
            .article-body { padding: 24px; }
            .article-body .content { font-size: 16px; }
            .article-sidebar { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 32px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .article-banner { padding: 40px 0 32px; min-height: 180px; }
            .article-banner h1 { font-size: 20px; }
            .article-body { padding: 16px; }
            .article-body .content { font-size: 15px; }
            .article-nav { flex-direction: column; }
            .article-nav a { max-width: 100%; justify-content: center; }
            .faq-question { font-size: 15px; padding: 14px 16px; }
            .faq-answer { padding: 0 16px 14px; }
            .cta-section .btn-cta { width: 100%; justify-content: center; }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1e40af;
            --primary-light: #3b82f6;
            --primary-dark: #1e3a8a;
            --secondary: #f59e0b;
            --secondary-light: #fbbf24;
            --accent: #10b981;
            --bg-body: #f8fafc;
            --bg-card: #ffffff;
            --bg-dark: #0f172a;
            --bg-dark-alt: #1e293b;
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --text-light: #94a3b8;
            --text-white: #ffffff;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
            --shadow-xl: 0 24px 60px rgba(0, 0, 0, 0.18);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --container: 1200px;
            --header-h: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

        a:hover {
            color: var(--primary-light);
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }

        button {
            cursor: pointer;
            background: none;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text-primary);
        }

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

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-h);
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
            z-index: 1000;
            transition: background var(--transition), box-shadow var(--transition);
        }

        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.98);
            box-shadow: var(--shadow-sm);
        }

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

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.5px;
        }

        .logo .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: #fff;
            border-radius: 8px;
            font-size: 18px;
            font-weight: 700;
        }

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

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

        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-list li a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
            position: relative;
        }

        .nav-list li a::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%) scaleX(0);
            width: 60%;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: transform var(--transition);
        }

        .nav-list li a:hover {
            color: var(--primary);
            background: rgba(30, 64, 175, 0.06);
        }

        .nav-list li a:hover::after {
            transform: translateX(-50%) scaleX(1);
        }

        .nav-list li a.active {
            color: var(--primary);
            font-weight: 600;
        }

        .nav-list li a.active::after {
            transform: translateX(-50%) scaleX(1);
            background: var(--primary);
        }

        .nav-list li a.nav-cta {
            background: var(--primary);
            color: #fff;
            padding: 8px 22px;
            border-radius: 8px;
            font-weight: 600;
            box-shadow: 0 2px 8px rgba(30, 64, 175, 0.25);
        }

        .nav-list li a.nav-cta::after {
            display: none;
        }

        .nav-list li a.nav-cta:hover {
            background: var(--primary-dark);
            box-shadow: 0 4px 16px rgba(30, 64, 175, 0.35);
            transform: translateY(-1px);
            color: #fff;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            cursor: pointer;
            background: none;
            border: none;
        }

        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--text-primary);
            border-radius: 4px;
            transition: var(--transition);
        }

        /* ===== Mobile Nav ===== */
        @media (max-width: 768px) {
            .nav-toggle {
                display: flex;
            }

            .nav-list {
                position: fixed;
                top: var(--header-h);
                left: 0;
                width: 100%;
                flex-direction: column;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(16px);
                padding: 16px 24px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
                box-shadow: var(--shadow);
            }

            .nav-list.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }

            .nav-list li a {
                width: 100%;
                padding: 12px 16px;
                font-size: 16px;
                border-radius: 8px;
            }

            .nav-list li a::after {
                display: none;
            }

            .nav-list li a.nav-cta {
                text-align: center;
                justify-content: center;
                margin-top: 8px;
            }

            .nav-toggle.active span:nth-child(1) {
                transform: rotate(45deg) translate(5px, 5px);
            }

            .nav-toggle.active span:nth-child(2) {
                opacity: 0;
            }

            .nav-toggle.active span:nth-child(3) {
                transform: rotate(-45deg) translate(5px, -5px);
            }
        }

        /* ===== Page Banner ===== */
        .page-banner {
            padding: 140px 0 80px;
            background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-dark-alt) 100%);
            position: relative;
            overflow: hidden;
            min-height: 360px;
            display: flex;
            align-items: center;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }

        .page-banner::after {
            content: '';
            position: absolute;
            top: -40%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(59, 130, 246, 0.15), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .page-banner .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }

        .page-banner h1 {
            font-size: 48px;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 16px;
            letter-spacing: -1px;
        }

        .page-banner h1 span {
            color: var(--secondary-light);
        }

        .page-banner p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.75);
            max-width: 640px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }

        .banner-tags {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
        }

        .banner-tags .tag {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 24px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.85);
            transition: var(--transition);
        }

        .banner-tags .tag:hover {
            background: rgba(255, 255, 255, 0.2);
            border-color: rgba(255, 255, 255, 0.3);
        }

        /* ===== Section Common ===== */
        .section {
            padding: 80px 0;
        }

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

        .section-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }

        .section-header {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 48px;
        }

        .section-header h2 {
            font-size: 34px;
            font-weight: 700;
            margin-bottom: 14px;
            letter-spacing: -0.5px;
        }

        .section-header h2 span {
            color: var(--primary-light);
        }

        .section-header p {
            font-size: 17px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .section-dark .section-header h2 {
            color: var(--text-white);
        }

        .section-dark .section-header p {
            color: rgba(255, 255, 255, 0.65);
        }

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

        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }

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

        .card-img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            display: block;
        }

        .card-body {
            padding: 20px 22px 24px;
        }

        .card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            margin-bottom: 10px;
        }

        .card-tags .badge {
            display: inline-block;
            padding: 3px 12px;
            background: rgba(30, 64, 175, 0.08);
            color: var(--primary);
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.3px;
        }

        .card-tags .badge.green {
            background: rgba(16, 185, 129, 0.1);
            color: var(--accent);
        }

        .card-tags .badge.orange {
            background: rgba(245, 158, 11, 0.12);
            color: #d97706;
        }

        .card-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .card-title a {
            color: var(--text-primary);
        }

        .card-title a:hover {
            color: var(--primary-light);
        }

        .card-text {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.65;
            margin-bottom: 14px;
        }

        .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-light);
            border-top: 1px solid var(--border-light);
            padding-top: 14px;
        }

        .card-meta .meta-left {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .card-meta .meta-left i {
            font-size: 14px;
        }

        /* ===== Featured Article (图文区块) ===== */
        .feature-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }

        .feature-block .feature-img {
            width: 100%;
            height: 420px;
            object-fit: cover;
        }

        .feature-block .feature-content {
            padding: 40px 48px 40px 0;
        }

        .feature-block .feature-content .badge {
            display: inline-block;
            padding: 4px 14px;
            background: rgba(30, 64, 175, 0.08);
            color: var(--primary);
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 14px;
        }

        .feature-block .feature-content h3 {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 14px;
            line-height: 1.3;
        }

        .feature-block .feature-content p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 20px;
        }

        /* ===== Stats / 数据块 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .stat-item {
            text-align: center;
            padding: 32px 20px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: var(--radius);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: var(--transition);
        }

        .stat-item:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.15);
            transform: translateY(-2px);
        }

        .stat-number {
            font-size: 40px;
            font-weight: 800;
            color: var(--secondary-light);
            line-height: 1.2;
            margin-bottom: 6px;
        }

        .stat-label {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.7);
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }

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

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            transition: var(--transition);
            gap: 16px;
        }

        .faq-question i {
            font-size: 14px;
            color: var(--text-light);
            transition: transform var(--transition);
            flex-shrink: 0;
        }

        .faq-item.active .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.7;
        }

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

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -30%;
            width: 700px;
            height: 700px;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.06), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-section h2 {
            font-size: 36px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
        }

        .cta-section p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 560px;
            margin: 0 auto 28px;
        }

        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 40px;
            background: #fff;
            color: var(--primary);
            border-radius: 12px;
            font-size: 17px;
            font-weight: 700;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
            transition: all var(--transition);
        }

        .cta-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
            color: var(--primary-dark);
            background: #f8fafc;
        }

        .cta-btn i {
            font-size: 18px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .footer-brand .logo {
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-brand .logo span {
            color: var(--secondary-light);
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.55);
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul li a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            transition: var(--transition);
        }

        .footer-col ul li a:hover {
            color: var(--secondary-light);
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 24px 0 32px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
            flex-wrap: wrap;
            gap: 16px;
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }

        .footer-bottom a:hover {
            color: var(--secondary-light);
        }

        .footer-socials {
            display: flex;
            gap: 14px;
        }

        .footer-socials a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            color: rgba(255, 255, 255, 0.5);
            font-size: 16px;
            transition: var(--transition);
        }

        .footer-socials a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }

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

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

            .footer-brand {
                grid-column: 1 / -1;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }

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

            .feature-block .feature-content {
                padding: 24px 28px 32px;
            }

            .feature-block .feature-img {
                height: 300px;
            }
        }

        @media (max-width: 768px) {
            .page-banner {
                padding: 120px 0 60px;
                min-height: 280px;
            }

            .page-banner h1 {
                font-size: 32px;
            }

            .page-banner p {
                font-size: 16px;
            }

            .section {
                padding: 56px 0;
            }

            .section-header h2 {
                font-size: 26px;
            }

            .cards-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }

            .stat-number {
                font-size: 32px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

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

            .feature-block .feature-content h3 {
                font-size: 22px;
            }

            .cta-section h2 {
                font-size: 28px;
            }

            .cta-btn {
                padding: 14px 28px;
                font-size: 15px;
            }

            .faq-question {
                font-size: 15px;
                padding: 14px 18px;
            }
        }

        @media (max-width: 480px) {
            .page-banner h1 {
                font-size: 26px;
            }

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

            .section-header h2 {
                font-size: 22px;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }

            .stat-item {
                padding: 20px 12px;
            }

            .stat-number {
                font-size: 28px;
            }

            .card-body {
                padding: 16px 18px 20px;
            }

            .card-title {
                font-size: 16px;
            }

            .feature-block .feature-content {
                padding: 20px 18px 24px;
            }

            .feature-block .feature-content h3 {
                font-size: 20px;
            }
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }

        .mt-12 {
            margin-top: 12px;
        }

        .mb-8 {
            margin-bottom: 8px;
        }

        .gap-8 {
            gap: 8px;
        }

        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* ===== Load More ===== */
        .load-more {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            background: var(--bg-card);
            border: 1.5px solid var(--border);
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-secondary);
            transition: all var(--transition);
            cursor: pointer;
            margin-top: 36px;
        }

        .load-more:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(30, 64, 175, 0.04);
            transform: translateY(-1px);
            box-shadow: var(--shadow-sm);
        }

        .load-more i {
            font-size: 14px;
            transition: transform var(--transition);
        }

        .load-more:hover i {
            transform: translateY(2px);
        }

        /* ===== Sub-nav Tabs ===== */
        .sub-nav {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 8px;
            margin-bottom: 40px;
        }

        .sub-nav a {
            display: inline-block;
            padding: 8px 20px;
            border-radius: 24px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }

        .sub-nav a:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(30, 64, 175, 0.04);
        }

        .sub-nav a.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            box-shadow: 0 2px 12px rgba(30, 64, 175, 0.25);
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-light);
            padding: 16px 0 8px;
            flex-wrap: wrap;
        }

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

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

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

        .breadcrumb .sep {
            color: var(--border);
            font-size: 12px;
        }