/* roulang page: index */
/* ===== 设计变量 ===== */
:root {
  --clr-primary: #0f1b3d;
  --clr-primary-light: #1a2a6c;
  --clr-accent: #d62828;
  --clr-accent-hover: #b71c1c;
  --clr-gold: #f4a261;
  --clr-gold-light: #f8c291;
  --clr-bg: #ffffff;
  --clr-bg-alt: #f4f6fb;
  --clr-bg-dark: #0a1228;
  --clr-text: #1a1a2e;
  --clr-text-light: #555e7a;
  --clr-text-muted: #8a94ad;
  --clr-border: #e2e6f0;
  --clr-white: #ffffff;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-sm: 0 2px 8px rgba(15,27,61,0.06);
  --shadow-md: 0 8px 28px rgba(15,27,61,0.10);
  --shadow-lg: 0 20px 48px rgba(15,27,61,0.14);
  --shadow-xl: 0 32px 64px rgba(15,27,61,0.18);
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
  --max-w: 1200px;
  --header-h: 72px;
  --space-section: 96px;
  --space-section-sm: 56px;
}

/* ===== Reset / Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--clr-text);
  background: var(--clr-bg);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--clr-primary-light); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--clr-accent); }
img { max-width: 100%; height: auto; display: block; }
button, input, textarea { font-family: inherit; font-size: 1rem; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 700; color: var(--clr-primary); }

/* ===== 容器 ===== */
.container { width: 100%; max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }
@media (max-width: 640px) { .container { padding: 0 16px; } }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 28px; border-radius: var(--radius-md);
  font-weight: 600; font-size: 0.95rem;
  border: none; cursor: pointer; transition: var(--transition);
  text-decoration: none; line-height: 1.2;
}
.btn-primary {
  background: var(--clr-accent); color: var(--clr-white);
  box-shadow: 0 4px 14px rgba(214,40,40,0.30);
}
.btn-primary:hover { background: var(--clr-accent-hover); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(214,40,40,0.40); color: var(--clr-white); }
.btn-primary:active { transform: translateY(0); }
.btn-outline {
  background: transparent; color: var(--clr-white);
  border: 2px solid var(--clr-white);
}
.btn-outline:hover { background: var(--clr-white); color: var(--clr-primary); border-color: var(--clr-white); transform: translateY(-2px); }
.btn-ghost {
  background: transparent; color: var(--clr-primary-light);
  border: 2px solid var(--clr-border);
}
.btn-ghost:hover { border-color: var(--clr-accent); color: var(--clr-accent); transform: translateY(-2px); }
.btn-gold {
  background: var(--clr-gold); color: var(--clr-primary);
  box-shadow: 0 4px 14px rgba(244,162,97,0.30);
}
.btn-gold:hover { background: var(--clr-gold-light); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(244,162,97,0.40); color: var(--clr-primary); }
.btn-sm { padding: 8px 18px; font-size: 0.85rem; border-radius: var(--radius-sm); }
.btn-lg { padding: 16px 36px; font-size: 1.05rem; }
.btn:focus-visible { outline: 3px solid var(--clr-accent); outline-offset: 2px; }

/* ===== 标签 / 徽章 ===== */
.tag {
  display: inline-block; padding: 4px 14px; border-radius: 50px;
  font-size: 0.78rem; font-weight: 600; letter-spacing: 0.3px;
  background: var(--clr-bg-alt); color: var(--clr-primary-light);
  border: 1px solid var(--clr-border); transition: var(--transition);
}
.tag-accent { background: rgba(214,40,40,0.08); color: var(--clr-accent); border-color: rgba(214,40,40,0.15); }
.tag-gold { background: rgba(244,162,97,0.12); color: #b8651a; border-color: rgba(244,162,97,0.20); }
.tag-primary { background: rgba(15,27,61,0.06); color: var(--clr-primary); border-color: rgba(15,27,61,0.10); }
.badge {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 2px 10px; border-radius: 50px;
  font-size: 0.72rem; font-weight: 700; text-transform: uppercase;
  background: var(--clr-accent); color: var(--clr-white);
}
.badge-gold { background: var(--clr-gold); color: var(--clr-primary); }

/* ===== 卡片 ===== */
.card {
  background: var(--clr-white); border-radius: var(--radius-md);
  border: 1px solid var(--clr-border);
  box-shadow: var(--shadow-sm); transition: var(--transition);
  overflow: hidden;
}
.card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.card-img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
.card-body { padding: 20px 24px 24px; }
.card-title { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; }
.card-text { font-size: 0.92rem; color: var(--clr-text-light); line-height: 1.6; }
.card-footer { padding: 12px 24px; border-top: 1px solid var(--clr-border); background: var(--clr-bg-alt); font-size: 0.85rem; color: var(--clr-text-muted); display: flex; justify-content: space-between; align-items: center; }

/* ===== 列表项 ===== */
.list-item { display: flex; align-items: flex-start; gap: 12px; padding: 14px 0; border-bottom: 1px solid var(--clr-border); }
.list-item:last-child { border-bottom: none; }
.list-icon { flex-shrink: 0; width: 28px; height: 28px; border-radius: 50%; background: var(--clr-bg-alt); display: flex; align-items: center; justify-content: center; color: var(--clr-accent); font-size: 0.85rem; }

/* ===== 统计数字块 ===== */
.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat-card { text-align: center; padding: 32px 16px; border-radius: var(--radius-md); background: var(--clr-white); border: 1px solid var(--clr-border); box-shadow: var(--shadow-sm); transition: var(--transition); }
.stat-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
.stat-number { font-size: 2.6rem; font-weight: 800; color: var(--clr-accent); line-height: 1.1; margin-bottom: 4px; }
.stat-label { font-size: 0.92rem; color: var(--clr-text-light); font-weight: 500; }
@media (max-width: 768px) { .stat-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .stat-grid { grid-template-columns: 1fr 1fr; } .stat-number { font-size: 2rem; } }

/* ===== 流程 / 步骤 ===== */
.steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.step-card { text-align: center; padding: 32px 20px; position: relative; }
.step-number { width: 52px; height: 52px; border-radius: 50%; background: var(--clr-primary); color: var(--clr-white); font-size: 1.4rem; font-weight: 800; display: flex; align-items: center; justify-content: center; margin: 0 auto 16px; position: relative; z-index: 1; }
.step-card::after { content: ''; position: absolute; top: 26px; left: 60%; width: 80%; height: 2px; background: var(--clr-border); z-index: 0; }
.step-card:last-child::after { display: none; }
.step-title { font-size: 1.05rem; font-weight: 700; margin-bottom: 6px; }
.step-desc { font-size: 0.88rem; color: var(--clr-text-light); }
@media (max-width: 768px) { .steps-grid { grid-template-columns: repeat(2, 1fr); } .step-card::after { display: none; } }
@media (max-width: 480px) { .steps-grid { grid-template-columns: 1fr; } }

/* ===== 板块通用 ===== */
.section { padding: var(--space-section) 0; }
.section-alt { background: var(--clr-bg-alt); }
.section-dark { background: var(--clr-bg-dark); color: var(--clr-white); }
.section-title { font-size: 2.2rem; font-weight: 800; text-align: center; margin-bottom: 12px; letter-spacing: -0.5px; }
.section-sub { font-size: 1.05rem; color: var(--clr-text-light); text-align: center; max-width: 680px; margin: 0 auto 48px; line-height: 1.6; }
.section-dark .section-title { color: var(--clr-white); }
.section-dark .section-sub { color: rgba(255,255,255,0.70); }
@media (max-width: 640px) { .section-title { font-size: 1.6rem; } .section-sub { font-size: 0.95rem; margin-bottom: 32px; } }

/* ===== Header / Nav ===== */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: var(--header-h);
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(226,230,240,0.60);
  transition: var(--transition);
}
.header.scrolled { box-shadow: 0 2px 20px rgba(15,27,61,0.08); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: var(--header-h); }
.logo { font-size: 1.35rem; font-weight: 800; color: var(--clr-primary); display: flex; align-items: center; gap: 6px; letter-spacing: -0.3px; }
.logo i { color: var(--clr-accent); font-size: 1.5rem; }
.logo:hover { color: var(--clr-primary); }
.nav { display: flex; align-items: center; gap: 8px; }
.nav a {
  padding: 8px 20px; border-radius: 50px;
  font-size: 0.92rem; font-weight: 600;
  color: var(--clr-text-light);
  transition: var(--transition);
  text-decoration: none;
  background: transparent;
}
.nav a:hover { color: var(--clr-primary); background: var(--clr-bg-alt); }
.nav a.active { color: var(--clr-white); background: var(--clr-primary); }
.nav-cta { margin-left: 12px; }
.header-btn { display: flex; align-items: center; gap: 8px; }
.mobile-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 8px; background: none; border: none; }
.mobile-toggle span { width: 24px; height: 2.5px; background: var(--clr-primary); border-radius: 4px; transition: var(--transition); }
@media (max-width: 768px) {
  .mobile-toggle { display: flex; }
  .nav { position: fixed; top: var(--header-h); left: 0; right: 0; background: var(--clr-white); flex-direction: column; padding: 16px 24px 24px; gap: 4px; border-bottom: 1px solid var(--clr-border); box-shadow: var(--shadow-md); transform: translateY(-110%); opacity: 0; pointer-events: none; transition: var(--transition); }
  .nav.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav a { width: 100%; text-align: center; padding: 12px 20px; }
  .nav-cta { margin-left: 0; margin-top: 8px; width: 100%; }
  .nav-cta .btn { width: 100%; justify-content: center; }
}

/* ===== Hero ===== */
.hero {
  position: relative; min-height: 88vh; display: flex; align-items: center;
  margin-top: var(--header-h);
  background: var(--clr-bg-dark);
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0;
  background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  opacity: 0.45;
  transform: scale(1.05);
  transition: transform 10s ease;
}
.hero:hover .hero-bg { transform: scale(1.0); }
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(15,27,61,0.88) 0%, rgba(15,27,61,0.60) 60%, rgba(214,40,40,0.25) 100%);
}
.hero-content { position: relative; z-index: 2; max-width: 760px; padding: 80px 0; }
.hero-tag { display: inline-block; padding: 6px 18px; border-radius: 50px; background: rgba(244,162,97,0.18); color: var(--clr-gold); font-size: 0.85rem; font-weight: 600; margin-bottom: 20px; border: 1px solid rgba(244,162,97,0.20); }
.hero-title { font-size: 3.6rem; font-weight: 900; color: var(--clr-white); line-height: 1.1; margin-bottom: 20px; letter-spacing: -1px; }
.hero-title span { color: var(--clr-gold); }
.hero-desc { font-size: 1.15rem; color: rgba(255,255,255,0.80); max-width: 580px; line-height: 1.7; margin-bottom: 36px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 32px; margin-top: 48px; padding-top: 32px; border-top: 1px solid rgba(255,255,255,0.12); }
.hero-stat-item { text-align: left; }
.hero-stat-number { font-size: 1.8rem; font-weight: 800; color: var(--clr-gold); }
.hero-stat-label { font-size: 0.85rem; color: rgba(255,255,255,0.55); }
@media (max-width: 768px) {
  .hero { min-height: 70vh; }
  .hero-title { font-size: 2.4rem; }
  .hero-desc { font-size: 1rem; }
  .hero-stats { flex-wrap: wrap; gap: 20px; }
  .hero-stat-number { font-size: 1.4rem; }
}
@media (max-width: 480px) {
  .hero-title { font-size: 1.8rem; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }
}

/* ===== 图文交错 ===== */
.alt-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.alt-grid.reverse { direction: rtl; }
.alt-grid.reverse > * { direction: ltr; }
.alt-image { border-radius: var(--radius-lg); box-shadow: var(--shadow-md); overflow: hidden; }
.alt-image img { width: 100%; height: 400px; object-fit: cover; transition: var(--transition); }
.alt-image:hover img { transform: scale(1.03); }
.alt-content h3 { font-size: 1.8rem; font-weight: 800; margin-bottom: 16px; }
.alt-content p { font-size: 1rem; color: var(--clr-text-light); line-height: 1.8; margin-bottom: 16px; }
.alt-content .tag { margin-bottom: 12px; }
@media (max-width: 768px) {
  .alt-grid { grid-template-columns: 1fr; gap: 24px; }
  .alt-grid.reverse { direction: ltr; }
  .alt-image img { height: 240px; }
  .alt-content h3 { font-size: 1.4rem; }
}

/* ===== 卡片网格 ===== */
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.card-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.card-grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 992px) { .card-grid { grid-template-columns: repeat(2, 1fr); } .card-grid.cols-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .card-grid { grid-template-columns: 1fr; } .card-grid.cols-2 { grid-template-columns: 1fr; } .card-grid.cols-4 { grid-template-columns: 1fr; } }

/* ===== 资讯列表 ===== */
.post-list { display: grid; gap: 20px; }
.post-card { display: flex; gap: 20px; align-items: flex-start; padding: 20px 24px; background: var(--clr-white); border-radius: var(--radius-md); border: 1px solid var(--clr-border); box-shadow: var(--shadow-sm); transition: var(--transition); }
.post-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.post-thumb { flex-shrink: 0; width: 180px; height: 120px; border-radius: var(--radius-sm); overflow: hidden; }
.post-thumb img { width: 100%; height: 100%; object-fit: cover; }
.post-info { flex: 1; min-width: 0; }
.post-meta { display: flex; align-items: center; gap: 12px; font-size: 0.82rem; color: var(--clr-text-muted); margin-bottom: 6px; }
.post-meta .tag { font-size: 0.72rem; padding: 2px 10px; }
.post-info h4 { font-size: 1.08rem; font-weight: 700; margin-bottom: 6px; }
.post-info h4 a { color: var(--clr-primary); }
.post-info h4 a:hover { color: var(--clr-accent); }
.post-excerpt { font-size: 0.9rem; color: var(--clr-text-light); line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.post-empty { padding: 48px 24px; text-align: center; color: var(--clr-text-muted); font-size: 1rem; background: var(--clr-bg-alt); border-radius: var(--radius-md); border: 1px dashed var(--clr-border); }
@media (max-width: 640px) {
  .post-card { flex-direction: column; }
  .post-thumb { width: 100%; height: 180px; }
}

/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; display: grid; gap: 12px; }
.faq-item { background: var(--clr-white); border-radius: var(--radius-md); border: 1px solid var(--clr-border); overflow: hidden; transition: var(--transition); }
.faq-item:hover { border-color: var(--clr-primary-light); }
.faq-question { padding: 18px 24px; font-weight: 600; font-size: 1rem; cursor: pointer; display: flex; justify-content: space-between; align-items: center; color: var(--clr-primary); background: none; border: none; width: 100%; text-align: left; transition: var(--transition); }
.faq-question i { transition: var(--transition); color: var(--clr-accent); }
.faq-item.open .faq-question i { transform: rotate(180deg); }
.faq-answer { padding: 0 24px 18px; font-size: 0.92rem; color: var(--clr-text-light); line-height: 1.7; display: none; }
.faq-item.open .faq-answer { display: block; }

/* ===== CTA ===== */
.cta-section { background: var(--clr-primary); position: relative; overflow: hidden; }
.cta-section::before { content: ''; position: absolute; inset: 0; background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat; opacity: 0.10; }
.cta-content { position: relative; z-index: 1; text-align: center; padding: 72px 24px; }
.cta-title { font-size: 2.4rem; font-weight: 800; color: var(--clr-white); margin-bottom: 16px; }
.cta-desc { font-size: 1.1rem; color: rgba(255,255,255,0.75); max-width: 560px; margin: 0 auto 32px; }
.cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
@media (max-width: 640px) {
  .cta-title { font-size: 1.6rem; }
  .cta-desc { font-size: 0.95rem; }
  .cta-actions { flex-direction: column; align-items: center; }
  .cta-actions .btn { width: 100%; max-width: 300px; justify-content: center; }
}

/* ===== Footer ===== */
.footer { background: var(--clr-bg-dark); color: rgba(255,255,255,0.70); padding: 56px 0 32px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand .logo { color: var(--clr-white); margin-bottom: 12px; }
.footer-brand p { font-size: 0.9rem; line-height: 1.7; max-width: 300px; }
.footer h5 { color: var(--clr-white); font-size: 0.95rem; font-weight: 700; margin-bottom: 16px; text-transform: uppercase; letter-spacing: 0.5px; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { color: rgba(255,255,255,0.60); font-size: 0.9rem; transition: var(--transition); }
.footer-links a:hover { color: var(--clr-gold); padding-left: 4px; }
.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(255,255,255,0.70); transition: var(--transition); }
.footer-social a:hover { background: var(--clr-accent); color: var(--clr-white); transform: translateY(-3px); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding-top: 20px; display: flex; justify-content: space-between; align-items: center; font-size: 0.85rem; color: rgba(255,255,255,0.40); flex-wrap: wrap; gap: 12px; }
@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* ===== 工具类 ===== */
.text-center { text-align: center; }
.mt-12 { margin-top: 12px; }
.mt-24 { margin-top: 24px; }
.mb-12 { margin-bottom: 12px; }
.mb-24 { margin-bottom: 24px; }
.gap-8 { gap: 8px; }
.gap-16 { gap: 16px; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-wrap { flex-wrap: wrap; }

/* ===== 分类入口卡片（chip 风格） ===== */
.chip-grid { display: flex; gap: 16px; flex-wrap: wrap; justify-content: center; }
.chip-card {
  flex: 0 0 200px; padding: 28px 20px; border-radius: var(--radius-lg);
  background: var(--clr-white); border: 1px solid var(--clr-border);
  box-shadow: var(--shadow-sm); text-align: center; cursor: pointer;
  transition: var(--transition); text-decoration: none; color: var(--clr-text);
}
.chip-card:hover { box-shadow: var(--shadow-md); transform: translateY(-6px); border-color: var(--clr-accent); color: var(--clr-text); }
.chip-icon { font-size: 2.2rem; color: var(--clr-accent); margin-bottom: 12px; }
.chip-label { font-size: 1rem; font-weight: 700; }
.chip-count { font-size: 0.8rem; color: var(--clr-text-muted); margin-top: 4px; }
@media (max-width: 640px) { .chip-card { flex: 0 0 160px; padding: 20px 16px; } }

/* ===== 动画 ===== */
@keyframes fadeUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
.animate-fade-up { animation: fadeUp 0.6s ease forwards; }
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }

/* ===== 图片装饰 ===== */
.img-decor { position: relative; display: inline-block; }
.img-decor::after { content: ''; position: absolute; inset: 0; border-radius: var(--radius-lg); background: linear-gradient(135deg, rgba(214,40,40,0.10), rgba(244,162,97,0.10)); pointer-events: none; }

/* 分隔线装饰 */
.divider { width: 60px; height: 4px; background: var(--clr-accent); border-radius: 4px; margin: 0 auto 16px; }
.divider-gold { background: var(--clr-gold); }

/* 响应式微调 */
@media (max-width: 1024px) {
  :root { --space-section: 72px; }
}
@media (max-width: 768px) {
  :root { --space-section: 56px; --header-h: 64px; }
}

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #E53935;
            --primary-dark: #C62828;
            --primary-light: #FFEBEE;
            --secondary: #1A237E;
            --secondary-light: #E8EAF6;
            --accent: #FF6F00;
            --accent-light: #FFF8E1;
            --bg: #F9FAFB;
            --bg-alt: #FFFFFF;
            --bg-dark: #1A1A2E;
            --text: #1F2937;
            --text-light: #6B7280;
            --text-inverse: #FFFFFF;
            --border: #E5E7EB;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.12);
            --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.10);
            --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);
            min-height: 100vh;
        }

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

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

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

        button {
            cursor: pointer;
            background: none;
        }

        ul {
            list-style: none;
        }

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

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

        /* ===== Typography ===== */
        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary-light);
            color: var(--primary-dark);
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.3px;
            margin-bottom: 16px;
        }

        .section-title {
            font-size: 36px;
            font-weight: 800;
            letter-spacing: -0.5px;
            margin-bottom: 16px;
            color: var(--text);
        }

        .section-sub {
            font-size: 18px;
            color: var(--text-light);
            max-width: 640px;
            line-height: 1.7;
        }

        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-header .section-sub {
            margin: 0 auto;
        }

        /* ===== Header / Nav ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(255, 255, 255, 0.88);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(229, 231, 235, 0.5);
            transition: var(--transition);
        }

        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.3px;
        }

        .logo i {
            font-size: 26px;
            color: var(--accent);
        }

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

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

        .nav a {
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-light);
            transition: var(--transition);
            position: relative;
        }

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

        .nav a.active {
            color: var(--text-inverse);
            background: var(--primary);
            font-weight: 600;
            box-shadow: 0 4px 12px rgba(229, 57, 53, 0.3);
        }

        .nav .nav-cta {
            margin-left: 12px;
        }

        .header-btn {
            padding: 10px 24px !important;
            border-radius: 50px !important;
            font-weight: 600 !important;
            font-size: 14px !important;
            display: flex !important;
            align-items: center !important;
            gap: 8px !important;
        }

        .header-btn i {
            font-size: 16px;
        }

        .mobile-toggle {
            display: none;
            font-size: 24px;
            color: var(--text);
            padding: 8px;
            border-radius: var(--radius-xs);
            background: none;
            border: none;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 15px;
            transition: var(--transition);
            border: 2px solid transparent;
            justify-content: center;
        }

        .btn-primary {
            background: var(--primary);
            color: var(--text-inverse);
            border-color: var(--primary);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(229, 57, 53, 0.35);
        }

        .btn-primary:active {
            transform: translateY(0);
        }

        .btn-secondary {
            background: var(--secondary);
            color: var(--text-inverse);
            border-color: var(--secondary);
        }

        .btn-secondary:hover {
            background: #0D125A;
            border-color: #0D125A;
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(26, 35, 126, 0.35);
        }

        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }

        .btn-outline:hover {
            background: var(--primary);
            color: var(--text-inverse);
            transform: translateY(-2px);
        }

        .btn-sm {
            padding: 10px 20px;
            font-size: 13px;
        }

        .btn-lg {
            padding: 18px 40px;
            font-size: 17px;
        }

        .btn:focus-visible {
            outline: 3px solid var(--primary);
            outline-offset: 3px;
        }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.3px;
        }

        .badge-red {
            background: var(--primary-light);
            color: var(--primary-dark);
        }

        .badge-blue {
            background: var(--secondary-light);
            color: var(--secondary);
        }

        .badge-amber {
            background: var(--accent-light);
            color: var(--accent);
        }

        .badge-green {
            background: #E8F5E9;
            color: #2E7D32;
        }

        /* ===== Hero / Banner ===== */
        .page-banner {
            padding: 140px 0 80px;
            background: linear-gradient(135deg, var(--secondary) 0%, #0D125A 60%, var(--primary-dark) 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;
            bottom: -2px;
            left: 0;
            right: 0;
            height: 80px;
            background: linear-gradient(to top, var(--bg), transparent);
        }

        .banner-content {
            position: relative;
            z-index: 2;
            text-align: center;
        }

        .banner-content .section-tag {
            background: rgba(255, 255, 255, 0.15);
            color: var(--text-inverse);
            backdrop-filter: blur(4px);
        }

        .banner-content h1 {
            font-size: 48px;
            font-weight: 900;
            color: var(--text-inverse);
            letter-spacing: -1px;
            margin-bottom: 16px;
        }

        .banner-content p {
            font-size: 20px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 680px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }

        .banner-stats {
            display: flex;
            justify-content: center;
            gap: 48px;
            margin-top: 32px;
            flex-wrap: wrap;
        }

        .banner-stat {
            text-align: center;
            color: var(--text-inverse);
        }

        .banner-stat .num {
            font-size: 36px;
            font-weight: 900;
            display: block;
            line-height: 1.2;
        }

        .banner-stat .label {
            font-size: 14px;
            opacity: 0.8;
            font-weight: 400;
        }

        /* ===== Main Sections ===== */
        section {
            padding: 80px 0;
        }

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

        /* ===== Category Tabs ===== */
        .category-tabs {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            margin-bottom: 48px;
        }

        .category-tab {
            padding: 10px 24px;
            border-radius: 50px;
            font-size: 14px;
            font-weight: 500;
            background: var(--bg-alt);
            border: 1px solid var(--border);
            color: var(--text-light);
            transition: var(--transition);
            cursor: pointer;
        }

        .category-tab:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-light);
        }

        .category-tab.active {
            background: var(--primary);
            color: var(--text-inverse);
            border-color: var(--primary);
            font-weight: 600;
            box-shadow: 0 4px 16px rgba(229, 57, 53, 0.3);
        }

        /* ===== Card Grid ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
            gap: 28px;
        }

        .card-grid.cols-2 {
            grid-template-columns: repeat(auto-fill, minmax(460px, 1fr));
        }

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

        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }

        .card .card-img {
            width: 100%;
            height: 220px;
            object-fit: cover;
            display: block;
        }

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

        .card .card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 12px;
        }

        .card .card-title {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
            line-height: 1.4;
        }

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

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

        .card .card-text {
            color: var(--text-light);
            font-size: 15px;
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .card .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--text-light);
            padding-top: 16px;
            border-top: 1px solid var(--border);
        }

        .card .card-meta i {
            margin-right: 4px;
        }

        /* ===== Featured / Large Card ===== */
        .featured-card {
            display: grid;
            grid-template-columns: 1fr 1fr;
            background: var(--bg-alt);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: var(--transition);
        }

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

        .featured-card .fc-img {
            height: 100%;
            min-height: 380px;
            object-fit: cover;
            width: 100%;
        }

        .featured-card .fc-body {
            padding: 40px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .featured-card .fc-body .badge {
            margin-bottom: 12px;
        }

        .featured-card .fc-body h3 {
            font-size: 28px;
            font-weight: 800;
            margin-bottom: 16px;
        }

        .featured-card .fc-body p {
            color: var(--text-light);
            font-size: 16px;
            line-height: 1.8;
            margin-bottom: 20px;
        }

        /* ===== Icon Features ===== */
        .icon-features {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
            gap: 28px;
        }

        .icon-feat {
            text-align: center;
            padding: 32px 20px;
            background: var(--bg-alt);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: var(--transition);
        }

        .icon-feat:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .icon-feat .icon-wrap {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 28px;
        }

        .icon-feat .icon-wrap.red {
            background: var(--primary-light);
            color: var(--primary-dark);
        }

        .icon-feat .icon-wrap.blue {
            background: var(--secondary-light);
            color: var(--secondary);
        }

        .icon-feat .icon-wrap.amber {
            background: var(--accent-light);
            color: var(--accent);
        }

        .icon-feat .icon-wrap.green {
            background: #E8F5E9;
            color: #2E7D32;
        }

        .icon-feat h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .icon-feat p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
        }

        /* ===== Schedule List ===== */
        .schedule-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .schedule-item {
            display: flex;
            align-items: center;
            gap: 20px;
            background: var(--bg-alt);
            padding: 20px 28px;
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: var(--transition);
        }

        .schedule-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateX(4px);
        }

        .schedule-item .s-time {
            font-size: 14px;
            font-weight: 700;
            color: var(--primary);
            min-width: 80px;
        }

        .schedule-item .s-teams {
            flex: 1;
            font-size: 16px;
            font-weight: 600;
        }

        .schedule-item .s-league {
            font-size: 13px;
            color: var(--text-light);
        }

        .schedule-item .s-status {
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 12px;
            font-weight: 600;
        }

        .schedule-item .s-status.live {
            background: #FFEBEE;
            color: #C62828;
            animation: pulse-dot 1.5s ease-in-out infinite;
        }

        .schedule-item .s-status.upcoming {
            background: #E8F5E9;
            color: #2E7D32;
        }

        .schedule-item .s-status.finished {
            background: #F3F4F6;
            color: #9CA3AF;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.6;
            }
        }

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

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

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

        .faq-question {
            width: 100%;
            padding: 20px 28px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            background: none;
            text-align: left;
            gap: 16px;
        }

        .faq-question i {
            font-size: 18px;
            color: var(--primary);
            transition: var(--transition);
            flex-shrink: 0;
        }

        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 28px;
            color: var(--text-light);
            font-size: 15px;
            line-height: 1.8;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 28px 24px;
        }

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

        .cta-section h2 {
            font-size: 38px;
            font-weight: 900;
            color: var(--text-inverse);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .cta-section p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 600px;
            margin: 0 auto 32px;
        }

        .cta-section .btn {
            font-size: 17px;
            padding: 18px 44px;
        }

        .cta-section .btn-primary {
            background: var(--text-inverse);
            color: var(--primary);
            border-color: var(--text-inverse);
        }

        .cta-section .btn-primary:hover {
            background: transparent;
            color: var(--text-inverse);
            border-color: var(--text-inverse);
            transform: translateY(-2px);
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.85);
            padding: 64px 0 32px;
        }

        .footer .logo {
            color: var(--text-inverse);
            margin-bottom: 16px;
        }

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

        .footer .logo span {
            color: rgba(255, 255, 255, 0.7);
        }

        .footer p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            max-width: 360px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer h5 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-inverse);
            margin-bottom: 18px;
        }

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

        .footer-links a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
        }

        .footer-links a:hover {
            color: var(--primary);
            transform: translateX(4px);
        }

        .footer-social {
            display: flex;
            gap: 12px;
            margin-top: 20px;
        }

        .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;
            font-size: 18px;
            color: rgba(255, 255, 255, 0.7);
            transition: var(--transition);
        }

        .footer-social a:hover {
            background: var(--primary);
            color: var(--text-inverse);
            transform: translateY(-3px);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
            flex-wrap: wrap;
            gap: 12px;
        }

        .footer-bottom i {
            color: var(--primary);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }

            .card-grid.cols-2 {
                grid-template-columns: 1fr;
            }

            .featured-card {
                grid-template-columns: 1fr;
            }

            .featured-card .fc-img {
                min-height: 260px;
                max-height: 300px;
            }

            .featured-card .fc-body {
                padding: 28px;
            }
        }

        @media (max-width: 768px) {
            .nav {
                display: none;
                position: absolute;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 16px 24px 24px;
                gap: 6px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-lg);
            }

            .nav.open {
                display: flex;
            }

            .nav a {
                width: 100%;
                text-align: center;
                padding: 12px 18px;
            }

            .nav .nav-cta {
                margin-left: 0;
                margin-top: 8px;
                width: 100%;
            }

            .nav .nav-cta a {
                width: 100%;
                justify-content: center;
            }

            .mobile-toggle {
                display: block;
            }

            .page-banner {
                padding: 120px 0 60px;
                min-height: 300px;
            }

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

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

            .banner-stats {
                gap: 24px;
            }

            .banner-stat .num {
                font-size: 28px;
            }

            .section-title {
                font-size: 28px;
            }

            .section-sub {
                font-size: 16px;
            }

            section {
                padding: 56px 0;
            }

            .card-grid {
                grid-template-columns: 1fr;
            }

            .icon-features {
                grid-template-columns: 1fr 1fr;
            }

            .schedule-item {
                flex-wrap: wrap;
                gap: 12px;
                padding: 16px 20px;
            }

            .schedule-item .s-time {
                min-width: auto;
            }

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

            .cta-section p {
                font-size: 16px;
            }

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

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

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .banner-content h1 {
                font-size: 26px;
            }

            .banner-stats {
                flex-direction: column;
                gap: 16px;
            }

            .icon-features {
                grid-template-columns: 1fr;
            }

            .card .card-img {
                height: 180px;
            }

            .featured-card .fc-body h3 {
                font-size: 22px;
            }

            .faq-question {
                padding: 16px 20px;
                font-size: 15px;
            }

            .faq-answer {
                padding: 0 20px;
                font-size: 14px;
            }

            .faq-item.open .faq-answer {
                padding: 0 20px 20px;
            }
        }

        /* ===== Accessibility ===== */
        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                transition-duration: 0.01ms !important;
            }
        }

        a:focus-visible,
        button:focus-visible {
            outline: 3px solid var(--primary);
            outline-offset: 3px;
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar {
            width: 8px;
        }

        ::-webkit-scrollbar-track {
            background: var(--bg);
        }

        ::-webkit-scrollbar-thumb {
            background: var(--border);
            border-radius: 4px;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: var(--text-light);
        }

        /* ===== Skeleton / Placeholder ===== */
        .skeleton {
            background: linear-gradient(90deg, var(--border) 25%, #F3F4F6 50%, var(--border) 75%);
            background-size: 200% 100%;
            animation: shimmer 1.5s infinite;
            border-radius: var(--radius-xs);
        }

        @keyframes shimmer {
            0% {
                background-position: 200% 0;
            }
            100% {
                background-position: -200% 0;
            }
        }

/* roulang page: article */
/* ========== 设计变量 ========== */
:root {
  --primary: #1a1a2e;
  --primary-light: #2d2d4a;
  --accent: #e8a838;
  --accent-hover: #d4952e;
  --accent-light: #fef3e2;
  --green: #2d6a4f;
  --green-light: #e8f5ee;
  --bg: #f5f6fa;
  --bg-card: #ffffff;
  --text: #1a1a2e;
  --text-weak: #6b7280;
  --text-white: #ffffff;
  --border: #e5e7eb;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --shadow: 0 4px 20px rgba(0,0,0,0.06);
  --shadow-hover: 0 12px 32px rgba(0,0,0,0.12);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --container: 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(--accent); }
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; }
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
  color: var(--primary);
}
.section-sub {
  font-size: 1.05rem;
  color: var(--text-weak);
  max-width: 640px;
  line-height: 1.6;
}
.text-center { text-align: center; }
.flex-center { display: flex; align-items: center; justify-content: center; }

/* ========== Header & Nav ========== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(229,231,235,0.5);
  height: var(--nav-height);
  transition: background var(--transition);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
}
.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 10px;
  letter-spacing: -0.02em;
  flex-shrink: 0;
}
.logo i { color: var(--accent); font-size: 1.4rem; }
.logo:hover { color: var(--primary); }
.nav {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav a {
  padding: 8px 18px;
  border-radius: 40px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-weak);
  transition: all var(--transition);
  position: relative;
}
.nav a:hover { color: var(--primary); background: rgba(26,26,46,0.06); }
.nav a.active { color: var(--text-white); background: var(--primary); }
.nav-cta { margin-left: 12px; }
.header-btn {
  padding: 10px 24px !important;
  border-radius: 40px !important;
  font-weight: 600 !important;
  font-size: 0.9rem !important;
  display: flex !important;
  align-items: center;
  gap: 8px;
  background: var(--accent) !important;
  color: var(--primary) !important;
  box-shadow: 0 4px 14px rgba(232,168,56,0.35);
}
.header-btn:hover { background: var(--accent-hover) !important; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(232,168,56,0.45); }
.mobile-toggle { display: none; background: none; font-size: 1.5rem; color: var(--primary); cursor: pointer; padding: 8px; border-radius: 8px; }
.mobile-toggle:hover { background: rgba(26,26,46,0.06); }

/* ========== Hero / Banner 内页 ========== */
.page-banner {
  padding: 120px 0 60px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  position: relative;
  overflow: hidden;
  min-height: 260px;
  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: 0.12;
  mix-blend-mode: overlay;
}
.page-banner .container { position: relative; z-index: 2; }
.page-banner h1 {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--text-white);
  letter-spacing: -0.02em;
  line-height: 1.2;
  max-width: 800px;
}
.page-banner .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.7);
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.page-banner .breadcrumb a { color: rgba(255,255,255,0.8); }
.page-banner .breadcrumb a:hover { color: var(--accent); }
.page-banner .breadcrumb span { color: rgba(255,255,255,0.5); }
.page-banner .breadcrumb i { font-size: 0.7rem; color: rgba(255,255,255,0.4); }

/* ========== 文章主体 ========== */
.article-main { padding: 60px 0 80px; }
.article-grid {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 48px;
  align-items: start;
}
.article-content { background: var(--bg-card); border-radius: var(--radius-lg); padding: 48px; box-shadow: var(--shadow); }
.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}
.article-meta .tag {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 40px;
  font-size: 0.8rem;
  font-weight: 600;
  background: var(--accent-light);
  color: var(--accent);
  letter-spacing: 0.02em;
}
.article-meta .date { font-size: 0.9rem; color: var(--text-weak); display: flex; align-items: center; gap: 6px; }
.article-meta .author { font-size: 0.9rem; color: var(--text-weak); display: flex; align-items: center; gap: 6px; }
.article-cover {
  width: 100%;
  border-radius: var(--radius);
  margin-bottom: 32px;
  overflow: hidden;
  aspect-ratio: 16/9;
  object-fit: cover;
  background: var(--border);
}
.article-body {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--text);
}
.article-body p { margin-bottom: 1.4em; }
.article-body h2, .article-body h3 { margin-top: 1.8em; margin-bottom: 0.6em; font-weight: 700; color: var(--primary); }
.article-body h2 { font-size: 1.6rem; }
.article-body h3 { font-size: 1.3rem; }
.article-body ul, .article-body ol { margin-bottom: 1.4em; padding-left: 1.6em; }
.article-body ul li { list-style: disc; margin-bottom: 0.4em; }
.article-body ol li { list-style: decimal; margin-bottom: 0.4em; }
.article-body blockquote {
  border-left: 4px solid var(--accent);
  padding: 16px 24px;
  margin: 1.6em 0;
  background: var(--accent-light);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic;
  color: var(--text-weak);
}
.article-body img { border-radius: var(--radius); margin: 1.6em 0; width: 100%; }
.article-body a { color: var(--accent); text-decoration: underline; }
.article-body a:hover { color: var(--accent-hover); }
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
.article-tags .tag {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 40px;
  font-size: 0.85rem;
  background: var(--bg);
  color: var(--text-weak);
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.article-tags .tag:hover { background: var(--primary); color: var(--text-white); border-color: var(--primary); }
.article-share {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 24px;
}
.article-share span { font-size: 0.9rem; color: var(--text-weak); }
.article-share a {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  color: var(--text-weak);
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.article-share a:hover { background: var(--accent); color: var(--text-white); border-color: var(--accent); transform: translateY(-2px); }

/* ========== 侧边栏 ========== */
.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 32px;
}
.sidebar-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
}
.sidebar-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--accent);
  display: flex;
  align-items: center;
  gap: 8px;
}
.sidebar-card h3 i { color: var(--accent); }
.sidebar-list { display: flex; flex-direction: column; gap: 12px; }
.sidebar-list a {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  transition: all var(--transition);
}
.sidebar-list a:last-child { border-bottom: none; }
.sidebar-list a:hover { padding-left: 8px; }
.sidebar-list .num {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-weak);
  flex-shrink: 0;
}
.sidebar-list .num.top { background: var(--accent); color: var(--text-white); }
.sidebar-list .text { font-size: 0.9rem; line-height: 1.4; color: var(--text); }
.sidebar-list .text small { display: block; font-size: 0.8rem; color: var(--text-weak); margin-top: 4px; }

/* ========== 相关推荐 ========== */
.related-section { padding: 60px 0 80px; background: var(--bg); }
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 40px;
}
.related-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all var(--transition);
}
.related-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.related-card .thumb {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
  display: block;
  background: var(--border);
}
.related-card .info { padding: 20px; }
.related-card .info h4 { font-size: 1rem; font-weight: 600; line-height: 1.4; margin-bottom: 8px; }
.related-card .info h4 a { color: var(--primary); }
.related-card .info h4 a:hover { color: var(--accent); }
.related-card .info p { font-size: 0.9rem; color: var(--text-weak); line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.related-card .info .meta { display: flex; align-items: center; gap: 12px; margin-top: 12px; font-size: 0.8rem; color: var(--text-weak); }
.related-card .info .meta .tag { padding: 2px 10px; border-radius: 40px; background: var(--accent-light); color: var(--accent); font-weight: 600; font-size: 0.7rem; }

/* ========== CTA ========== */
.cta-section {
  padding: 80px 0;
  background: linear-gradient(135deg, var(--primary) 0%, #0f0f1e 100%);
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-1.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: 2.2rem; font-weight: 800; color: var(--text-white); margin-bottom: 16px; }
.cta-section p { font-size: 1.1rem; color: rgba(255,255,255,0.7); max-width: 600px; margin: 0 auto 32px; }
.cta-buttons { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 36px;
  border-radius: 40px;
  font-weight: 600;
  font-size: 1rem;
  transition: all var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
}
.btn-primary { background: var(--accent); color: var(--primary); box-shadow: 0 4px 20px rgba(232,168,56,0.4); }
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-3px); box-shadow: 0 8px 30px rgba(232,168,56,0.55); color: var(--primary); }
.btn-outline { background: transparent; color: var(--text-white); border-color: rgba(255,255,255,0.3); }
.btn-outline:hover { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.6); color: var(--text-white); transform: translateY(-3px); }

/* ========== 错误提示 ========== */
.error-block {
  padding: 100px 0;
  text-align: center;
}
.error-block .icon { font-size: 4rem; color: var(--text-weak); margin-bottom: 24px; opacity: 0.4; }
.error-block h2 { font-size: 2rem; color: var(--primary); margin-bottom: 12px; }
.error-block p { font-size: 1.1rem; color: var(--text-weak); margin-bottom: 32px; }
.error-block .btn { display: inline-flex; }

/* ========== Footer ========== */
.footer {
  background: #111122;
  color: rgba(255,255,255,0.7);
  padding: 60px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand .logo { color: var(--text-white); font-size: 1.4rem; margin-bottom: 16px; }
.footer-brand .logo i { color: var(--accent); }
.footer-brand p { font-size: 0.9rem; line-height: 1.7; color: rgba(255,255,255,0.55); max-width: 340px; }
.footer-social { display: flex; gap: 12px; margin-top: 20px; }
.footer-social a {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.08);
  color: rgba(255,255,255,0.6);
  transition: all var(--transition);
  font-size: 1.1rem;
}
.footer-social a:hover { background: var(--accent); color: var(--primary); transform: translateY(-3px); }
.footer h5 { font-size: 0.95rem; font-weight: 700; color: var(--text-white); margin-bottom: 20px; letter-spacing: 0.02em; }
.footer-links { display: flex; flex-direction: column; gap: 12px; }
.footer-links a { font-size: 0.9rem; color: rgba(255,255,255,0.55); transition: all var(--transition); display: flex; align-items: center; gap: 6px; }
.footer-links a:hover { color: var(--accent); padding-left: 4px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.4);
}
.footer-bottom i { color: var(--accent); }

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .article-grid { grid-template-columns: 1fr; }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .section { padding: 60px 0; }
  .page-banner h1 { font-size: 2rem; }
}
@media (max-width: 768px) {
  .nav { display: none; flex-direction: column; background: var(--bg-card); position: absolute; top: var(--nav-height); left: 0; width: 100%; padding: 20px 24px; box-shadow: 0 20px 40px rgba(0,0,0,0.1); border-radius: 0 0 var(--radius) var(--radius); gap: 6px; }
  .nav.open { display: flex; }
  .nav a { width: 100%; padding: 12px 16px; }
  .nav-cta { margin-left: 0; margin-top: 8px; width: 100%; }
  .nav-cta .header-btn { justify-content: center; width: 100%; }
  .mobile-toggle { display: block; }
  .section-title { font-size: 1.6rem; }
  .page-banner { padding: 100px 0 40px; min-height: 200px; }
  .page-banner h1 { font-size: 1.6rem; }
  .article-content { padding: 28px 20px; }
  .article-body { font-size: 1rem; }
  .related-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; align-items: center; text-align: center; }
  .cta-section h2 { font-size: 1.6rem; }
  .container { padding: 0 16px; }
}
@media (max-width: 520px) {
  .article-meta { flex-direction: column; align-items: flex-start; gap: 8px; }
  .article-share { flex-wrap: wrap; }
  .section { padding: 40px 0; }
  .page-banner h1 { font-size: 1.3rem; }
  .article-content { padding: 20px 16px; border-radius: var(--radius); }
  .btn { padding: 12px 24px; font-size: 0.9rem; }
}