/* roulang page: index */
/* ===== Design Variables ===== */
:root {
  --primary: #1a2d4a;
  --primary-light: #2c4a6e;
  --primary-dark: #0f1a2e;
  --accent: #f0a500;
  --accent-hover: #d49400;
  --accent-light: #fff3d6;
  --bg: #ffffff;
  --bg-alt: #f5f7fa;
  --bg-dark: #0f1a2e;
  --text: #1a1a2e;
  --text-light: #6b7280;
  --text-muted: #9ca3af;
  --text-white: #ffffff;
  --border: #e5e7eb;
  --border-light: #f0f2f5;
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
  --shadow-hover: 0 16px 48px rgba(0,0,0,0.15);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', 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);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent); }
button { cursor: pointer; font-family: inherit; border: none; background: none; }
input, textarea { font-family: inherit; font-size: 1rem; }
ul, ol { list-style: none; }

/* ===== Container ===== */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}
@media (max-width: 768px) {
  .container { padding: 0 16px; }
}

/* ===== Header & Navigation ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  z-index: 1000;
  transition: box-shadow var(--transition);
}
.site-header.scrolled { box-shadow: var(--shadow); }
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}
.nav-left, .nav-right {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-left { flex: 1; justify-content: flex-start; }
.nav-right { flex: 1; justify-content: flex-end; }
.site-logo {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.5px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
  padding: 0 16px;
}
.site-logo i { color: var(--accent); font-size: 1.4rem; }
.site-logo span { background: linear-gradient(135deg, var(--primary), var(--primary-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-light);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  position: relative;
}
.nav-link:hover { color: var(--primary); background: var(--bg-alt); }
.nav-link.active { color: var(--primary); background: var(--accent-light); font-weight: 600; }
.nav-link.active::after { content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%); width: 20px; height: 3px; background: var(--accent); border-radius: 2px; }
.mobile-toggle { display: none; font-size: 1.4rem; color: var(--primary); padding: 8px; border-radius: var(--radius-sm); transition: background var(--transition); }
.mobile-toggle:hover { background: var(--bg-alt); }

@media (max-width: 768px) {
  .nav-left, .nav-right { display: none; }
  .mobile-toggle { display: block; }
  .header-inner { justify-content: space-between; }
  .site-logo { font-size: 1.4rem; padding: 0; }
  .mobile-menu-open .nav-left,
  .mobile-menu-open .nav-right {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    gap: 4px;
    align-items: stretch;
  }
  .mobile-menu-open .nav-left { z-index: 1001; }
  .mobile-menu-open .nav-right { z-index: 1000; top: calc(var(--header-height) + 200px); }
  .mobile-menu-open .nav-link { padding: 12px 16px; font-size: 1.05rem; justify-content: center; }
  .mobile-menu-open .nav-link.active::after { display: none; }
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 24px 80px;
  background: linear-gradient(135deg, rgba(15,26,46,0.85) 0%, rgba(26,45,74,0.75) 100%), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  color: var(--text-white);
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(240,165,0,0.15) 0%, transparent 70%);
  pointer-events: none;
}
.hero-content { position: relative; z-index: 2; max-width: 800px; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(240,165,0,0.2);
  border: 1px solid rgba(240,165,0,0.3);
  padding: 8px 20px;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 24px;
  backdrop-filter: blur(4px);
}
.hero h1 {
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -1px;
}
.hero h1 span { color: var(--accent); }
.hero p {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: rgba(255,255,255,0.85);
  max-width: 600px;
  margin: 0 auto 36px;
  line-height: 1.8;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  line-height: 1.2;
}
.btn-primary {
  background: var(--accent);
  color: var(--primary-dark);
  box-shadow: 0 4px 16px rgba(240,165,0,0.35);
}
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: 0 8px 28px rgba(240,165,0,0.4); color: var(--primary-dark); }
.btn-outline {
  border: 2px solid rgba(255,255,255,0.4);
  color: var(--text-white);
  background: transparent;
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent); background: rgba(240,165,0,0.1); transform: translateY(-2px); }
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  justify-content: center;
  margin-top: 56px;
  padding-top: 40px;
  border-top: 1px solid rgba(255,255,255,0.1);
}
.hero-stat { text-align: center; }
.hero-stat .num { font-size: 2rem; font-weight: 800; color: var(--accent); display: block; }
.hero-stat .label { font-size: 0.85rem; color: rgba(255,255,255,0.6); margin-top: 4px; }

@media (max-width: 768px) {
  .hero { min-height: 80vh; padding: 100px 16px 60px; }
  .hero-stats { gap: 24px; padding-top: 28px; margin-top: 36px; }
  .hero-stat .num { font-size: 1.6rem; }
}

/* ===== Section Common ===== */
.section {
  padding: 80px 0;
}
.section-alt { background: var(--bg-alt); }
.section-dark { background: var(--bg-dark); color: var(--text-white); }
.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 48px;
}
.section-header .tag {
  display: inline-block;
  padding: 4px 16px;
  background: var(--accent-light);
  color: var(--accent-hover);
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: 50px;
  margin-bottom: 12px;
  letter-spacing: 0.5px;
}
.section-header h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}
.section-header p {
  color: var(--text-light);
  font-size: 1.05rem;
  line-height: 1.7;
}
.section-dark .section-header h2 { color: var(--text-white); }
.section-dark .section-header p { color: rgba(255,255,255,0.7); }

@media (max-width: 768px) {
  .section { padding: 56px 0; }
  .section-header { margin-bottom: 32px; }
}

/* ===== Features ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.feature-card {
  background: var(--bg);
  border-radius: var(--radius);
  padding: 36px 28px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: all var(--transition);
  text-align: center;
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: var(--accent-light); }
.feature-icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  background: var(--accent-light);
  color: var(--accent-hover);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin: 0 auto 20px;
  transition: all var(--transition);
}
.feature-card:hover .feature-icon { background: var(--accent); color: var(--text-white); }
.feature-card h3 { font-size: 1.2rem; font-weight: 600; margin-bottom: 10px; }
.feature-card p { color: var(--text-light); font-size: 0.95rem; line-height: 1.7; }

@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .features-grid { grid-template-columns: 1fr; }
  .feature-card { padding: 28px 20px; }
}

/* ===== Category Cards ===== */
.category-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}
.category-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  aspect-ratio: 16 / 9;
  background: var(--bg-dark);
}
.category-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.category-card img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s ease; opacity: 0.7; }
.category-card:hover img { transform: scale(1.05); }
.category-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 32px 24px 24px;
  background: linear-gradient(transparent, rgba(15,26,46,0.85));
  color: var(--text-white);
}
.category-overlay h3 { font-size: 1.4rem; font-weight: 700; margin-bottom: 6px; }
.category-overlay p { font-size: 0.9rem; color: rgba(255,255,255,0.75); }
.category-card .tag {
  position: absolute;
  top: 16px;
  left: 16px;
  background: var(--accent);
  color: var(--primary-dark);
  padding: 4px 14px;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
}

@media (max-width: 768px) {
  .category-grid { grid-template-columns: 1fr; gap: 20px; }
}

/* ===== Content / News Grid ===== */
.content-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.content-card {
  background: var(--bg);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}
.content-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.content-card .card-img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  transition: transform 0.6s ease;
}
.content-card:hover .card-img { transform: scale(1.03); }
.content-card .card-body { padding: 20px 22px 24px; flex: 1; display: flex; flex-direction: column; }
.content-card .card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}
.content-card .card-meta .cat {
  background: var(--accent-light);
  color: var(--accent-hover);
  padding: 2px 12px;
  border-radius: 50px;
  font-weight: 500;
  font-size: 0.75rem;
}
.content-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 8px;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.content-card h3 a { color: var(--text); }
.content-card h3 a:hover { color: var(--accent-hover); }
.content-card p {
  color: var(--text-light);
  font-size: 0.9rem;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 12px;
}
.content-card .card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-light);
  padding-top: 14px;
  margin-top: auto;
}
.empty-news {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 20px;
  color: var(--text-light);
  font-size: 1.05rem;
  background: var(--bg-alt);
  border-radius: var(--radius);
}

@media (max-width: 1024px) {
  .content-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .content-grid { grid-template-columns: 1fr; gap: 20px; }
}

/* ===== Process / Steps ===== */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.step-card {
  text-align: center;
  padding: 32px 20px;
  position: relative;
}
.step-num {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--primary-dark);
  font-size: 1.4rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  position: relative;
  z-index: 1;
}
.step-card::after {
  content: '→';
  position: absolute;
  top: 32px;
  right: -16px;
  font-size: 1.6rem;
  color: var(--accent);
  opacity: 0.5;
  font-weight: 300;
}
.step-card:last-child::after { display: none; }
.step-card h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 8px; }
.step-card p { color: var(--text-light); font-size: 0.9rem; line-height: 1.6; }
.section-dark .step-card h3 { color: var(--text-white); }
.section-dark .step-card p { color: rgba(255,255,255,0.7); }
.section-dark .step-card::after { color: var(--accent); opacity: 0.4; }

@media (max-width: 1024px) {
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .step-card:nth-child(2)::after { display: none; }
}
@media (max-width: 640px) {
  .steps-grid { grid-template-columns: 1fr; gap: 16px; }
  .step-card::after { display: none !important; }
}

/* ===== FAQ ===== */
.faq-list { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--bg);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: all var(--transition);
}
.faq-item:hover { border-color: var(--accent-light); }
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text);
  text-align: left;
  background: none;
  transition: all var(--transition);
  gap: 16px;
}
.faq-question:hover { color: var(--accent-hover); }
.faq-question i { color: var(--accent); transition: transform var(--transition); font-size: 0.9rem; }
.faq-item.open .faq-question i { transform: rotate(180deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  padding: 0 24px;
  color: var(--text-light);
  font-size: 0.95rem;
  line-height: 1.7;
}
.faq-item.open .faq-answer {
  max-height: 300px;
  padding: 0 24px 20px;
}
.section-dark .faq-item { background: rgba(255,255,255,0.05); border-color: rgba(255,255,255,0.1); }
.section-dark .faq-question { color: var(--text-white); }
.section-dark .faq-answer { color: rgba(255,255,255,0.7); }

/* ===== CTA ===== */
.cta-section {
  position: relative;
  padding: 100px 0;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
  text-align: center;
  color: var(--text-white);
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
  opacity: 0.08;
  pointer-events: none;
}
.cta-section .container { position: relative; z-index: 2; }
.cta-section h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 700;
  margin-bottom: 16px;
}
.cta-section p {
  color: rgba(255,255,255,0.8);
  font-size: 1.1rem;
  max-width: 560px;
  margin: 0 auto 32px;
}
.cta-section .btn-primary { font-size: 1.1rem; padding: 16px 40px; }

/* ===== Footer ===== */
.site-footer {
  background: var(--bg-dark);
  color: rgba(255,255,255,0.7);
  padding: 60px 0 32px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand .site-logo { color: var(--text-white); padding: 0; margin-bottom: 16px; }
.footer-brand p { font-size: 0.9rem; line-height: 1.7; max-width: 320px; color: rgba(255,255,255,0.5); }
.footer-col h4 {
  color: var(--text-white);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 16px;
}
.footer-col a {
  display: block;
  color: rgba(255,255,255,0.5);
  font-size: 0.9rem;
  padding: 4px 0;
  transition: color var(--transition);
}
.footer-col a:hover { color: var(--accent); }
.footer-social { display: flex; gap: 12px; margin-top: 16px; }
.footer-social a {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.6);
  transition: all var(--transition);
}
.footer-social a:hover { background: var(--accent); color: var(--primary-dark); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 24px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.4);
}

@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 640px) {
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
}

/* ===== Utility ===== */
.text-accent { color: var(--accent); }
.text-center { text-align: center; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mb-32 { margin-bottom: 32px; }
.gap-16 { gap: 16px; }
.gap-24 { gap: 24px; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-wrap { flex-wrap: wrap; }

/* ===== Responsive Fine-tune ===== */
@media (max-width: 480px) {
  .hero h1 { font-size: 2rem; }
  .hero p { font-size: 0.95rem; }
  .btn { padding: 12px 24px; font-size: 0.9rem; }
  .section-header h2 { font-size: 1.6rem; }
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #e63946;
            --primary-dark: #c1121f;
            --primary-light: #ff6b6b;
            --secondary: #1d3557;
            --secondary-light: #457b9d;
            --accent: #f4a261;
            --bg-body: #f8f9fa;
            --bg-white: #ffffff;
            --bg-dark: #0a0a0a;
            --bg-section-alt: #f0f2f5;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-light: #7a7a9a;
            --text-white: #ffffff;
            --border-color: #e0e0e8;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.10);
            --shadow-hover: 0 20px 40px rgba(0, 0, 0, 0.12);
            --transition: 0.3s ease;
            --font-sans: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
            --spacing-section: 80px;
            --spacing-block: 48px;
        }

        /* ===== 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-body);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }
        a {
            color: var(--secondary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary);
        }
        a:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
            border-radius: 4px;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        button:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            color: var(--text-primary);
            font-weight: 700;
        }
        h1 {
            font-size: 2.8rem;
        }
        h2 {
            font-size: 2rem;
        }
        h3 {
            font-size: 1.4rem;
        }
        h4 {
            font-size: 1.1rem;
        }
        p {
            margin-bottom: 1rem;
            color: var(--text-secondary);
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .section {
            padding: var(--spacing-section) 0;
        }
        .section-alt {
            background: var(--bg-section-alt);
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .section-dark h2,
        .section-dark h3,
        .section-dark p {
            color: var(--text-white);
        }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            position: relative;
            display: inline-block;
            margin-bottom: 16px;
        }
        .section-title h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: var(--primary);
            border-radius: 4px;
            margin: 12px auto 0;
        }
        .section-title p {
            max-width: 640px;
            margin: 0 auto;
            font-size: 1.1rem;
            color: var(--text-light);
        }
        .text-center {
            text-align: center;
        }

        /* ===== Header & Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(224, 224, 232, 0.5);
            z-index: 1000;
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.04);
        }
        .header-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            position: relative;
        }
        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            white-space: nowrap;
        }
        .nav-link i {
            font-size: 0.9rem;
        }
        .nav-link:hover {
            color: var(--primary);
            background: rgba(230, 57, 70, 0.06);
        }
        .nav-link.active {
            color: var(--primary);
            background: rgba(230, 57, 70, 0.10);
            font-weight: 600;
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.5px;
            transition: opacity var(--transition);
            flex-shrink: 0;
        }
        .site-logo i {
            color: var(--primary);
            font-size: 1.8rem;
        }
        .site-logo span {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .site-logo:hover {
            opacity: 0.85;
        }
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.6rem;
            color: var(--text-primary);
            cursor: pointer;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .mobile-toggle:hover {
            background: rgba(0, 0, 0, 0.04);
        }

        /* ===== Hero / Banner ===== */
        .page-hero {
            position: relative;
            padding: 140px 0 80px;
            background: linear-gradient(135deg, rgba(29, 53, 87, 0.92), rgba(0, 0, 0, 0.80)), url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            color: var(--text-white);
            text-align: center;
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: radial-gradient(ellipse at 30% 50%, rgba(230, 57, 70, 0.20), transparent 70%);
        }
        .page-hero .container {
            position: relative;
            z-index: 1;
        }
        .page-hero h1 {
            font-size: 3.2rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .page-hero h1 i {
            color: var(--primary-light);
            margin-right: 12px;
        }
        .page-hero p {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 680px;
            margin: 0 auto 24px;
            line-height: 1.8;
        }
        .page-hero .hero-tags {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
            margin-top: 20px;
        }
        .page-hero .hero-tags .tag {
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(4px);
            padding: 6px 20px;
            border-radius: 100px;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.92);
            border: 1px solid rgba(255, 255, 255, 0.12);
        }
        .breadcrumb {
            display: flex;
            justify-content: center;
            gap: 8px;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 24px;
        }
        .breadcrumb a {
            color: rgba(255, 255, 255, 0.8);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .breadcrumb a:hover {
            color: #fff;
        }
        .breadcrumb span {
            color: rgba(255, 255, 255, 0.5);
        }

        /* ===== Cards ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 28px;
        }
        .card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: transform var(--transition), box-shadow var(--transition);
            border: 1px solid var(--border-color);
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .card-img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
            border-radius: var(--radius-md) var(--radius-md) 0 0;
        }
        .card-body {
            padding: 24px 20px 20px;
        }
        .card-body .badge {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 3px 14px;
            border-radius: 100px;
            background: rgba(230, 57, 70, 0.10);
            color: var(--primary);
            margin-bottom: 10px;
            letter-spacing: 0.3px;
        }
        .card-body h3 {
            font-size: 1.15rem;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .card-body h3 a {
            color: var(--text-primary);
        }
        .card-body h3 a:hover {
            color: var(--primary);
        }
        .card-body p {
            font-size: 0.92rem;
            color: var(--text-light);
            margin-bottom: 0;
            line-height: 1.6;
        }
        .card-body .meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.82rem;
            color: var(--text-light);
            margin-top: 14px;
            padding-top: 14px;
            border-top: 1px solid var(--border-color);
        }
        .card-body .meta i {
            margin-right: 4px;
        }

        /* ===== 图文交替板块 ===== */
        .alt-grid {
            display: flex;
            flex-direction: column;
            gap: 48px;
        }
        .alt-row {
            display: flex;
            align-items: center;
            gap: 48px;
            flex-wrap: wrap;
        }
        .alt-row.reverse {
            flex-direction: row-reverse;
        }
        .alt-row .alt-img {
            flex: 1 1 42%;
            min-width: 280px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }
        .alt-row .alt-img img {
            width: 100%;
            aspect-ratio: 4 / 3;
            object-fit: cover;
        }
        .alt-row .alt-text {
            flex: 1 1 48%;
            min-width: 280px;
        }
        .alt-row .alt-text .subtitle {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: 1.5px;
            margin-bottom: 8px;
        }
        .alt-row .alt-text h3 {
            font-size: 1.6rem;
            margin-bottom: 16px;
        }
        .alt-row .alt-text p {
            font-size: 1rem;
            color: var(--text-secondary);
            margin-bottom: 16px;
        }
        .alt-row .alt-text .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 12px;
        }
        .alt-row .alt-text .tag-list .tag {
            padding: 4px 16px;
            border-radius: 100px;
            font-size: 0.82rem;
            background: var(--bg-section-alt);
            color: var(--text-secondary);
            border: 1px solid var(--border-color);
        }

        /* ===== 赛事日历/时间线 ===== */
        .timeline {
            position: relative;
            padding: 0 0 0 40px;
            max-width: 720px;
            margin: 0 auto;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 16px;
            top: 0;
            bottom: 0;
            width: 3px;
            background: linear-gradient(to bottom, var(--primary), var(--secondary));
            border-radius: 4px;
        }
        .timeline-item {
            position: relative;
            padding: 0 0 36px 32px;
        }
        .timeline-item:last-child {
            padding-bottom: 0;
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: -24px;
            top: 6px;
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background: var(--primary);
            border: 4px solid var(--bg-white);
            box-shadow: 0 0 0 3px var(--primary);
        }
        .timeline-item .t-date {
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 4px;
            letter-spacing: 0.5px;
        }
        .timeline-item h4 {
            font-size: 1.1rem;
            margin-bottom: 4px;
        }
        .timeline-item p {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            gap: 16px;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: rgba(230, 57, 70, 0.03);
        }
        .faq-question i {
            font-size: 1.1rem;
            color: var(--primary);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 18px;
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-box {
            background: linear-gradient(135deg, var(--secondary), #0f1a2e);
            border-radius: var(--radius-lg);
            padding: 60px 48px;
            text-align: center;
            color: var(--text-white);
            position: relative;
            overflow: hidden;
        }
        .cta-box::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -30%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(230, 57, 70, 0.15), transparent 70%);
            border-radius: 50%;
        }
        .cta-box h3 {
            font-size: 1.8rem;
            color: var(--text-white);
            margin-bottom: 12px;
        }
        .cta-box p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 540px;
            margin: 0 auto 24px;
        }
        .cta-box .btn-group {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            border-radius: 100px;
            font-size: 0.95rem;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
            line-height: 1.4;
        }
        .btn-primary {
            background: var(--primary);
            color: var(--text-white);
            box-shadow: 0 4px 16px rgba(230, 57, 70, 0.30);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            color: var(--text-white);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(230, 57, 70, 0.35);
        }
        .btn-secondary {
            background: rgba(255, 255, 255, 0.12);
            color: var(--text-white);
            border: 1px solid rgba(255, 255, 255, 0.25);
            backdrop-filter: blur(4px);
        }
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.22);
            color: var(--text-white);
            transform: translateY(-2px);
        }
        .btn-outline {
            background: transparent;
            color: var(--text-primary);
            border: 2px solid var(--border-color);
        }
        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 0.85rem;
        }

        /* ===== Stats / 数据块 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 28px;
            text-align: center;
        }
        .stat-item {
            padding: 28px 16px;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
        }
        .stat-item .number {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .stat-item .label {
            font-size: 0.92rem;
            color: var(--text-light);
            margin-top: 6px;
        }

        /* ===== Tags ===== */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
        }
        .tag-cloud .tag {
            padding: 6px 20px;
            border-radius: 100px;
            font-size: 0.88rem;
            background: var(--bg-white);
            color: var(--text-secondary);
            border: 1px solid var(--border-color);
            transition: all var(--transition);
        }
        .tag-cloud .tag:hover {
            background: var(--primary);
            color: var(--text-white);
            border-color: var(--primary);
            transform: translateY(-2px);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--secondary);
            color: rgba(255, 255, 255, 0.85);
            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: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .site-logo {
            color: var(--text-white);
            font-size: 1.5rem;
            margin-bottom: 12px;
        }
        .footer-brand .site-logo span {
            background: none;
            -webkit-text-fill-color: #fff;
            color: #fff;
        }
        .footer-brand p {
            font-size: 0.92rem;
            color: rgba(255, 255, 255, 0.65);
            margin: 12px 0 16px;
            max-width: 320px;
        }
        .footer-social {
            display: flex;
            gap: 14px;
        }
        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.7);
            font-size: 1.2rem;
            transition: all var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-3px);
        }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }
        .footer-col a {
            display: block;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.65);
            margin-bottom: 10px;
            transition: color var(--transition);
        }
        .footer-col a:hover {
            color: var(--primary-light);
        }
        .footer-col a i {
            width: 20px;
            margin-right: 6px;
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            padding: 24px 0 28px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
            gap: 12px;
        }
        .footer-bottom span {
            color: rgba(255, 255, 255, 0.45);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .page-hero h1 {
                font-size: 2.6rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --spacing-section: 52px;
                --header-height: 64px;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            h3 {
                font-size: 1.2rem;
            }
            .nav-left,
            .nav-right {
                display: none;
                flex-direction: column;
                position: absolute;
                top: var(--header-height);
                left: 0;
                width: 100%;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                padding: 16px 24px;
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
                border-radius: 0 0 var(--radius-md) var(--radius-md);
                gap: 4px;
            }
            .nav-left.open,
            .nav-right.open {
                display: flex;
            }
            .nav-left {
                top: calc(var(--header-height) + 4px);
            }
            .nav-right {
                top: calc(var(--header-height) + 160px);
            }
            .nav-link {
                padding: 12px 16px;
                font-size: 1rem;
                width: 100%;
            }
            .mobile-toggle {
                display: block;
            }
            .header-inner {
                justify-content: space-between;
            }
            .site-logo {
                font-size: 1.3rem;
                order: 0;
            }
            .nav-left {
                order: 1;
            }
            .mobile-toggle {
                order: 2;
            }
            .page-hero {
                padding: 110px 0 52px;
            }
            .page-hero h1 {
                font-size: 2rem;
            }
            .page-hero p {
                font-size: 1rem;
            }
            .page-hero .hero-tags .tag {
                font-size: 0.78rem;
                padding: 4px 14px;
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .alt-row {
                flex-direction: column !important;
                gap: 24px;
            }
            .alt-row .alt-img {
                flex: 1 1 100%;
                min-width: 0;
            }
            .alt-row .alt-text {
                flex: 1 1 100%;
                min-width: 0;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-item .number {
                font-size: 1.8rem;
            }
            .cta-box {
                padding: 40px 24px;
            }
            .cta-box h3 {
                font-size: 1.4rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .timeline {
                padding-left: 28px;
            }
            .timeline-item {
                padding-left: 24px;
            }
            .timeline-item::before {
                left: -18px;
                width: 12px;
                height: 12px;
            }
            .faq-question {
                padding: 14px 18px;
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 18px 14px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .page-hero h1 {
                font-size: 1.6rem;
            }
            .page-hero p {
                font-size: 0.9rem;
            }
            .card-body {
                padding: 18px 16px 16px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-item {
                padding: 20px 12px;
            }
            .stat-item .number {
                font-size: 1.5rem;
            }
            .btn {
                padding: 10px 24px;
                font-size: 0.88rem;
            }
            .section-title h2 {
                font-size: 1.4rem;
            }
            .alt-row .alt-text h3 {
                font-size: 1.3rem;
            }
            .cta-box {
                padding: 32px 18px;
            }
            .cta-box h3 {
                font-size: 1.2rem;
            }
            .tag-cloud .tag {
                font-size: 0.8rem;
                padding: 4px 14px;
            }
        }

        /* ===== 工具类 ===== */
        .mt-8 {
            margin-top: 8px;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }
        .mb-32 {
            margin-bottom: 32px;
        }
        .gap-16 {
            gap: 16px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }

/* roulang page: article */
/* ===== CSS 设计变量 ===== */
:root {
  --primary: #e63946;
  --primary-dark: #c1121f;
  --primary-light: #f4a261;
  --secondary: #1d3557;
  --secondary-light: #457b9d;
  --accent: #f77f00;
  --bg-light: #f8f9fa;
  --bg-white: #ffffff;
  --bg-dark: #1a1a2e;
  --text-primary: #1a1a2e;
  --text-secondary: #4a4a6a;
  --text-muted: #8a8aaa;
  --text-light: #f0f0f5;
  --border-color: #e2e2f0;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 8px 30px rgba(0,0,0,0.08);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.10);
  --shadow-xl: 0 30px 80px rgba(0,0,0,0.14);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
  --transition: 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; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--bg-light);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }
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: 2.2rem; }
h2 { font-size: 1.8rem; }
h3 { font-size: 1.4rem; }
h4 { font-size: 1.15rem; }
p { margin-bottom: 1rem; }
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}
.section { padding: 70px 0; }
.section-title {
  text-align: center;
  margin-bottom: 48px;
}
.section-title h2 {
  font-size: 2rem;
  position: relative;
  display: inline-block;
}
.section-title h2::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 4px;
  margin: 12px auto 0;
}
.section-title p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-top: 12px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* ===== Header / Nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(226,226,240,0.5);
  height: var(--header-height);
  display: flex;
  align-items: center;
  box-shadow: 0 1px 12px rgba(0,0,0,0.04);
}
.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.nav-left, .nav-right {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-link {
  padding: 8px 18px;
  border-radius: 40px;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-link i { font-size: 0.88rem; }
.nav-link:hover {
  background: rgba(230,57,70,0.06);
  color: var(--primary);
}
.nav-link.active {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(230,57,70,0.28);
}
.nav-link.active:hover {
  background: var(--primary-dark);
  color: #fff;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.3px;
  flex-shrink: 0;
  transition: var(--transition);
}
.site-logo i { color: var(--primary); font-size: 1.5rem; }
.site-logo span { background: linear-gradient(135deg, var(--primary), var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.site-logo:hover { opacity: 0.85; }
.mobile-toggle {
  display: none;
  background: none;
  font-size: 1.5rem;
  color: var(--text-primary);
  cursor: pointer;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.mobile-toggle:hover { background: rgba(0,0,0,0.04); }

/* ===== Mobile Nav ===== */
@media (max-width: 768px) {
  .nav-left, .nav-right {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(18px);
    flex-direction: column;
    padding: 16px 20px;
    gap: 8px;
    box-shadow: var(--shadow-lg);
    border-bottom: 1px solid var(--border-color);
    z-index: 999;
  }
  .nav-left.open, .nav-right.open {
    display: flex;
  }
  .nav-left { top: var(--header-height); }
  .nav-right { top: calc(var(--header-height) + 200px); }
  .nav-link {
    width: 100%;
    justify-content: center;
    padding: 12px 18px;
    font-size: 1rem;
  }
  .mobile-toggle { display: block; }
  .header-inner {
    flex-wrap: wrap;
  }
  .site-logo { order: 1; }
  .mobile-toggle { order: 3; }
  .nav-left { order: 4; }
  .nav-right { order: 5; }
}

/* ===== Article Hero / Banner ===== */
.article-hero {
  position: relative;
  padding: 60px 0 50px;
  background: linear-gradient(135deg, var(--secondary) 0%, #16213e 100%);
  overflow: hidden;
  min-height: 280px;
  display: flex;
  align-items: center;
}
.article-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  opacity: 0.18;
  mix-blend-mode: overlay;
}
.article-hero .container {
  position: relative;
  z-index: 2;
}
.article-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.65);
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.article-breadcrumb a {
  color: rgba(255,255,255,0.8);
}
.article-breadcrumb a:hover { color: #fff; }
.article-breadcrumb .sep { color: rgba(255,255,255,0.4); }
.article-hero h1 {
  font-size: 2.3rem;
  color: #fff;
  max-width: 820px;
  line-height: 1.3;
  margin-bottom: 16px;
  text-shadow: 0 2px 12px rgba(0,0,0,0.2);
}
.article-meta {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  color: rgba(255,255,255,0.75);
  font-size: 0.92rem;
}
.article-meta .meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
}
.article-meta .meta-item i { font-size: 0.85rem; }
.article-meta .category-tag {
  background: var(--primary);
  color: #fff;
  padding: 3px 14px;
  border-radius: 40px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.3px;
}

/* ===== Article Main Content ===== */
.article-main {
  padding: 50px 0 70px;
}
.article-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 48px;
  align-items: start;
}
.article-body {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 40px 44px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--text-primary);
}
.article-body h2, .article-body h3, .article-body h4 {
  margin-top: 1.8em;
  margin-bottom: 0.8em;
}
.article-body p {
  margin-bottom: 1.2em;
}
.article-body img {
  border-radius: var(--radius-md);
  margin: 1.5em 0;
  box-shadow: var(--shadow-md);
}
.article-body ul, .article-body ol {
  margin-bottom: 1.2em;
  padding-left: 1.6em;
}
.article-body ul { list-style: disc; }
.article-body ol { list-style: decimal; }
.article-body li { margin-bottom: 0.4em; }
.article-body blockquote {
  border-left: 4px solid var(--primary);
  background: rgba(230,57,70,0.04);
  padding: 16px 24px;
  margin: 1.5em 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-secondary);
  font-style: italic;
}
.article-body a { font-weight: 600; }
.article-body .content-not-found {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-secondary);
}
.article-body .content-not-found i { font-size: 3rem; color: var(--text-muted); margin-bottom: 16px; display: block; }
.article-body .content-not-found a { display: inline-block; margin-top: 16px; padding: 10px 28px; background: var(--primary); color: #fff; border-radius: 40px; font-weight: 600; }
.article-body .content-not-found a:hover { background: var(--primary-dark); }

/* ===== Sidebar ===== */
.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 32px;
}
.sidebar-card {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
}
.sidebar-card h4 {
  font-size: 1.1rem;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.sidebar-card h4 i { color: var(--primary); }
.sidebar-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.sidebar-list a {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.4;
  transition: var(--transition);
}
.sidebar-list a:hover { color: var(--primary); }
.sidebar-list a .num {
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--bg-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text-muted);
  transition: var(--transition);
}
.sidebar-list a:hover .num { background: var(--primary); color: #fff; }
.sidebar-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.sidebar-tags a {
  padding: 5px 16px;
  border-radius: 40px;
  background: var(--bg-light);
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-weight: 500;
  transition: var(--transition);
  border: 1px solid transparent;
}
.sidebar-tags a:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* ===== Related Articles ===== */
.related-section {
  background: var(--bg-white);
  padding: 60px 0;
  border-top: 1px solid var(--border-color);
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.related-card {
  background: var(--bg-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
  border: 1px solid var(--border-color);
}
.related-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.related-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-radius: 0;
}
.related-card .card-body {
  padding: 18px 20px 22px;
}
.related-card .card-body h4 {
  font-size: 1.02rem;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-card .card-body p {
  font-size: 0.88rem;
  color: var(--text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 0;
}
.related-card .card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ===== 404 / Not Found ===== */
.not-found-page {
  text-align: center;
  padding: 100px 24px;
}
.not-found-page i { font-size: 4rem; color: var(--text-muted); margin-bottom: 20px; display: block; }
.not-found-page h1 { font-size: 2rem; margin-bottom: 12px; }
.not-found-page p { color: var(--text-secondary); max-width: 480px; margin: 0 auto 28px; }
.not-found-page .btn-back { display: inline-block; padding: 12px 36px; background: var(--primary); color: #fff; border-radius: 40px; font-weight: 600; }
.not-found-page .btn-back:hover { background: var(--primary-dark); }

/* ===== Footer ===== */
.site-footer {
  background: var(--bg-dark);
  color: rgba(255,255,255,0.8);
  padding: 56px 0 0;
  margin-top: auto;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand .site-logo { color: #fff; margin-bottom: 16px; display: inline-flex; }
.footer-brand .site-logo span { -webkit-text-fill-color: #fff; background: none; }
.footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.55); max-width: 320px; line-height: 1.7; }
.footer-social { display: flex; gap: 14px; margin-top: 18px; }
.footer-social a {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.6);
  font-size: 1.1rem;
  transition: var(--transition);
}
.footer-social a:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }
.footer-col h4 {
  color: #fff;
  font-size: 1rem;
  margin-bottom: 18px;
  font-weight: 600;
}
.footer-col a {
  display: block;
  color: rgba(255,255,255,0.55);
  font-size: 0.9rem;
  margin-bottom: 10px;
  transition: var(--transition);
}
.footer-col a:hover { color: var(--primary-light); padding-left: 4px; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding: 22px 0;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.4);
}

/* ===== 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; }
}
@media (max-width: 768px) {
  .article-hero h1 { font-size: 1.6rem; }
  .article-body { padding: 24px 20px; }
  .related-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  h1 { font-size: 1.6rem; }
  h2 { font-size: 1.4rem; }
  .section { padding: 50px 0; }
}
@media (max-width: 520px) {
  .article-hero { padding: 40px 0; min-height: 200px; }
  .article-hero h1 { font-size: 1.3rem; }
  .article-meta { font-size: 0.82rem; gap: 12px; }
  .article-body { padding: 18px 16px; font-size: 0.96rem; }
  .container { padding: 0 16px; }
  .sidebar-card { padding: 20px 16px; }
}

/* ===== Skeleton / Loading ===== */
@keyframes shimmer { 0% { background-position: -200px 0; } 100% { background-position: calc(200px + 100%) 0; } }
.skeleton { background: linear-gradient(90deg, #eee 25%, #f5f5f5 50%, #eee 75%); background-size: 200px 100%; animation: shimmer 1.8s infinite; border-radius: var(--radius-sm); }

/* ===== Utility ===== */
.text-center { text-align: center; }
.mt-1 { margin-top: 10px; }
.mt-2 { margin-top: 20px; }
.mt-3 { margin-top: 30px; }
.mb-1 { margin-bottom: 10px; }
.mb-2 { margin-bottom: 20px; }