/* roulang page: index */
/* ===== 设计变量 ===== */
:root {
  --primary: #0b1a30;
  --primary-light: #132744;
  --primary-dark: #050e1a;
  --accent: #e53e3e;
  --accent-hover: #c53030;
  --accent-glow: rgba(229, 62, 62, 0.25);
  --gold: #f5a623;
  --gold-light: #f7c35a;
  --text: #f0f4f8;
  --text-secondary: #b8c5d9;
  --text-muted: #6f85a6;
  --bg: #060e1a;
  --bg-section: #0a1628;
  --bg-card: #0f1f38;
  --bg-card-hover: #142a4a;
  --border: #1a2d4d;
  --border-light: #243b5e;
  --radius-sm: 6px;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 8px 32px rgba(0,0,0,0.35);
  --shadow-sm: 0 2px 12px rgba(0,0,0,0.2);
  --shadow-lg: 0 16px 48px rgba(0,0,0,0.4);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  --max-w: 1200px;
  --header-h: 72px;
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
}
a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover, a:focus { color: var(--accent-hover); }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
img { max-width: 100%; height: auto; display: block; }
button, input, select, textarea { font-family: inherit; font-size: 1rem; }
button { cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 700; color: var(--text); }
h1 { font-size: 2.75rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.35rem; }
h4 { font-size: 1.1rem; }
p { margin-bottom: 1rem; color: var(--text-secondary); }
small { font-size: 0.85rem; color: var(--text-muted); }

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

/* ===== 通用 ===== */
.section { padding: 80px 0; }
.section-title {
  text-align: center;
  margin-bottom: 16px;
  font-size: 2.2rem;
  letter-spacing: -0.5px;
}
.section-subtitle {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 48px;
  color: var(--text-muted);
  font-size: 1.05rem;
}
.section-label {
  display: inline-block;
  background: var(--accent-glow);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 12px;
}
.text-center { text-align: center; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }

/* ===== Button ===== */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 12px 32px; border-radius: 50px;
  font-weight: 600; font-size: 0.95rem;
  transition: all var(--transition);
  border: 2px solid transparent;
  letter-spacing: 0.3px;
}
.btn-primary {
  background: var(--accent); color: #fff; border-color: var(--accent);
}
.btn-primary:hover, .btn-primary:focus {
  background: var(--accent-hover); border-color: var(--accent-hover);
  transform: translateY(-2px); box-shadow: 0 8px 24px var(--accent-glow);
  color: #fff;
}
.btn-outline {
  background: transparent; color: var(--text); border-color: var(--border-light);
}
.btn-outline:hover, .btn-outline:focus {
  border-color: var(--accent); color: var(--accent);
  transform: translateY(-2px);
}
.btn-gold {
  background: var(--gold); color: #0b1a30; border-color: var(--gold);
}
.btn-gold:hover, .btn-gold:focus {
  background: var(--gold-light); border-color: var(--gold-light);
  transform: translateY(-2px); box-shadow: 0 8px 24px rgba(245, 166, 35, 0.25);
  color: #0b1a30;
}
.btn-sm { padding: 8px 20px; font-size: 0.85rem; }
.btn-lg { padding: 16px 44px; font-size: 1.05rem; }

/* ===== 导航 ===== */
.header {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--header-h);
  background: rgba(6, 14, 26, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: background var(--transition);
}
.header.scrolled { background: rgba(6, 14, 26, 0.98); }
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 100%; max-width: var(--max-w); margin: 0 auto; padding: 0 24px;
}
.logo { font-size: 1.35rem; font-weight: 800; color: var(--text); letter-spacing: -0.3px; display: flex; align-items: center; gap: 8px; }
.logo i { color: var(--accent); font-size: 1.5rem; }
.logo:hover { color: var(--accent); }
.nav { display: flex; align-items: center; gap: 32px; }
.nav-link {
  font-size: 0.92rem; font-weight: 500; color: var(--text-secondary);
  padding: 6px 0; position: relative; transition: color var(--transition);
}
.nav-link::after {
  content: ''; position: absolute; bottom: -2px; left: 0; right: 0;
  height: 2px; background: var(--accent); border-radius: 2px;
  transform: scaleX(0); transition: transform var(--transition);
}
.nav-link:hover, .nav-link:focus { color: var(--text); }
.nav-link:hover::after, .nav-link:focus::after { transform: scaleX(1); }
.nav-link.active { color: var(--accent); }
.nav-link.active::after { transform: scaleX(1); }
.nav-cta .btn { padding: 8px 22px; font-size: 0.85rem; }
.nav-toggle { display: none; font-size: 1.5rem; color: var(--text); padding: 6px; }
.mobile-menu {
  display: none;
  position: fixed; top: var(--header-h); left: 0; right: 0; bottom: 0;
  background: rgba(6, 14, 26, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  flex-direction: column; align-items: center; justify-content: center;
  gap: 28px; z-index: 999;
}
.mobile-menu.open { display: flex; }
.mobile-menu .nav-link { font-size: 1.4rem; }

/* ===== Hero ===== */
.hero {
  position: relative; min-height: 90vh;
  display: flex; align-items: center;
  background: linear-gradient(135deg, #060e1a 0%, #0a1628 50%, #0f1f38 100%);
  overflow: hidden; padding-top: var(--header-h);
}
.hero-bg {
  position: absolute; inset: 0;
  background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  opacity: 0.2; z-index: 0;
}
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(6,14,26,0.85) 0%, rgba(10,22,40,0.65) 50%, rgba(15,31,56,0.75) 100%);
  z-index: 1;
}
.hero-content { position: relative; z-index: 2; max-width: 800px; padding: 80px 0; }
.hero-tag {
  display: inline-block; background: var(--accent-glow);
  color: var(--accent); font-size: 0.8rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 2px;
  padding: 6px 18px; border-radius: 20px; margin-bottom: 20px;
}
.hero h1 { font-size: 3.2rem; letter-spacing: -1px; line-height: 1.15; margin-bottom: 20px; }
.hero h1 span { color: var(--accent); }
.hero p { font-size: 1.15rem; color: var(--text-secondary); max-width: 600px; margin-bottom: 32px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-stats {
  display: flex; gap: 48px; margin-top: 56px; flex-wrap: wrap;
}
.hero-stat { text-align: center; }
.hero-stat-num { font-size: 2rem; font-weight: 800; color: var(--gold); }
.hero-stat-label { font-size: 0.85rem; color: var(--text-muted); margin-top: 2px; }

/* ===== Card ===== */
.card {
  background: var(--bg-card); border-radius: var(--radius);
  border: 1px solid var(--border); overflow: hidden;
  transition: all var(--transition);
}
.card:hover {
  background: var(--bg-card-hover); border-color: var(--border-light);
  transform: translateY(-4px); box-shadow: var(--shadow);
}
.card-img { width: 100%; height: 200px; object-fit: cover; }
.card-body { padding: 24px; }
.card-tag {
  display: inline-block; background: var(--accent-glow);
  color: var(--accent); font-size: 0.7rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 1px;
  padding: 3px 12px; border-radius: 12px; margin-bottom: 10px;
}
.card h3 { font-size: 1.15rem; margin-bottom: 8px; }
.card p { font-size: 0.92rem; color: var(--text-muted); margin-bottom: 0; }
.card-link { display: inline-flex; align-items: center; gap: 6px; color: var(--accent); font-weight: 600; font-size: 0.9rem; margin-top: 12px; }
.card-link i { transition: transform var(--transition); }
.card-link:hover i { transform: translateX(4px); }

/* ===== Grid ===== */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 32px; }
.grid-4 { display: grid; grid-template-columns: 1fr 1fr 1fr 1fr; gap: 24px; }

/* ===== Feature / 核心优势 ===== */
.feature-card { text-align: center; padding: 36px 24px; }
.feature-icon {
  width: 64px; height: 64px; margin: 0 auto 18px;
  display: flex; align-items: center; justify-content: center;
  background: var(--accent-glow); border-radius: 16px;
  font-size: 1.6rem; color: var(--accent);
}
.feature-card h3 { font-size: 1.15rem; margin-bottom: 10px; }
.feature-card p { font-size: 0.92rem; color: var(--text-muted); margin: 0; }

/* ===== 流程 ===== */
.steps { display: flex; gap: 32px; flex-wrap: wrap; justify-content: center; counter-reset: step; }
.step {
  flex: 1; min-width: 200px; max-width: 280px;
  text-align: center; padding: 32px 20px;
  position: relative;
}
.step::before {
  counter-increment: step;
  content: counter(step);
  display: block; width: 48px; height: 48px; line-height: 48px;
  margin: 0 auto 16px; border-radius: 50%;
  background: var(--accent); color: #fff;
  font-size: 1.2rem; font-weight: 700;
}
.step h4 { font-size: 1.05rem; margin-bottom: 6px; }
.step p { font-size: 0.88rem; color: var(--text-muted); margin: 0; }
.step-connector { display: none; }

/* ===== FAQ ===== */
.faq-list { max-width: 780px; margin: 0 auto; }
.faq-item {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); margin-bottom: 12px;
  overflow: hidden; transition: border-color var(--transition);
}
.faq-item:hover { border-color: var(--border-light); }
.faq-q {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 24px; cursor: pointer; font-weight: 600; color: var(--text);
  font-size: 1rem; transition: background var(--transition);
}
.faq-q:hover { background: rgba(255,255,255,0.03); }
.faq-q i { color: var(--accent); transition: transform var(--transition); font-size: 0.9rem; }
.faq-item.open .faq-q i { transform: rotate(180deg); }
.faq-a {
  max-height: 0; overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  padding: 0 24px; color: var(--text-secondary); font-size: 0.92rem;
  line-height: 1.7;
}
.faq-item.open .faq-a { max-height: 300px; padding: 0 24px 20px; }

/* ===== CTA ===== */
.cta-section {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  text-align: center;
}
.cta-section h2 { font-size: 2rem; margin-bottom: 12px; }
.cta-section p { color: var(--text-muted); max-width: 520px; margin: 0 auto 28px; }

/* ===== Footer ===== */
.footer {
  background: var(--primary-dark); border-top: 1px solid var(--border);
  padding: 48px 0 24px;
}
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px;
  margin-bottom: 32px;
}
.footer-brand .logo { font-size: 1.2rem; margin-bottom: 12px; }
.footer-brand p { font-size: 0.88rem; color: var(--text-muted); max-width: 300px; }
.footer-col h4 { font-size: 0.95rem; margin-bottom: 14px; color: var(--text); }
.footer-col a {
  display: block; font-size: 0.88rem; color: var(--text-muted);
  padding: 4px 0; transition: color var(--transition);
}
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid var(--border); padding-top: 20px;
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px;
}
.footer-bottom p { font-size: 0.82rem; color: var(--text-muted); margin: 0; }
.footer-social { display: flex; gap: 16px; }
.footer-social a { color: var(--text-muted); font-size: 1.1rem; transition: color var(--transition); }
.footer-social a:hover { color: var(--accent); }

/* ===== 最新资讯列表 ===== */
.post-list { display: grid; grid-template-columns: 1fr; gap: 16px; max-width: 800px; margin: 0 auto; }
.post-item {
  display: flex; align-items: flex-start; gap: 16px;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px 22px;
  transition: all var(--transition);
}
.post-item:hover { background: var(--bg-card-hover); border-color: var(--border-light); transform: translateX(4px); }
.post-item .post-icon { color: var(--accent); font-size: 1.2rem; margin-top: 2px; flex-shrink: 0; }
.post-item .post-body { flex: 1; }
.post-item .post-title { font-weight: 600; color: var(--text); font-size: 1rem; margin-bottom: 4px; display: block; }
.post-item .post-title:hover { color: var(--accent); }
.post-item .post-meta { font-size: 0.82rem; color: var(--text-muted); display: flex; gap: 16px; flex-wrap: wrap; }
.post-item .post-meta span { display: flex; align-items: center; gap: 4px; }
.post-item .post-cat {
  background: var(--accent-glow); color: var(--accent);
  font-size: 0.7rem; font-weight: 600; padding: 2px 10px; border-radius: 10px;
}

/* ===== Empty state ===== */
.empty-state { text-align: center; padding: 48px 24px; color: var(--text-muted); }
.empty-state i { font-size: 2.5rem; margin-bottom: 16px; display: block; color: var(--text-muted); }

/* ===== 分类入口 ===== */
.cat-card { position: relative; overflow: hidden; border-radius: var(--radius); height: 260px; display: flex; align-items: flex-end; }
.cat-card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.cat-card-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(0deg, rgba(6,14,26,0.85) 0%, rgba(6,14,26,0.2) 70%, transparent 100%);
  z-index: 1;
}
.cat-card-body { position: relative; z-index: 2; padding: 28px 24px; width: 100%; }
.cat-card-body h3 { font-size: 1.3rem; margin-bottom: 4px; }
.cat-card-body p { font-size: 0.88rem; color: var(--text-secondary); margin: 0; }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.6rem; }
  .section-title { font-size: 1.7rem; }
  .hero h1 { font-size: 2.2rem; }
  .hero p { font-size: 1rem; }
  .hero-stats { gap: 24px; margin-top: 32px; }
  .hero-stat-num { font-size: 1.5rem; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; gap: 20px; }
  .nav { display: none; }
  .nav-toggle { display: block; }
  .section { padding: 48px 0; }
  .steps { flex-direction: column; align-items: center; }
  .step { max-width: 100%; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .post-item { flex-direction: column; gap: 8px; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .cat-card { height: 200px; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .hero h1 { font-size: 1.8rem; }
  .hero { min-height: 75vh; }
  .section-title { font-size: 1.4rem; }
  .card-img { height: 160px; }
  .feature-card { padding: 24px 16px; }
  .faq-q { padding: 14px 16px; font-size: 0.92rem; }
  .faq-a { padding: 0 16px; font-size: 0.88rem; }
  .faq-item.open .faq-a { padding: 0 16px 16px; }
}

/* roulang page: article */
/* ===== 设计变量 ===== */
:root {
  --primary: #dc2626;
  --primary-dark: #b91c1c;
  --primary-light: #fca5a5;
  --primary-bg: #fef2f2;
  --secondary: #1e293b;
  --secondary-light: #334155;
  --accent: #f59e0b;
  --bg: #ffffff;
  --bg-alt: #f8fafc;
  --bg-dark: #0f172a;
  --text: #1e293b;
  --text-light: #64748b;
  --text-inverse: #ffffff;
  --border: #e2e8f0;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --shadow: 0 4px 24px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 48px rgba(0,0,0,0.10);
  --shadow-btn: 0 4px 14px rgba(220,38,38,0.30);
  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
  --font: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  --max-width: 1200px;
  --header-h: 72px;
}

/* ===== Reset / Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
button { cursor: pointer; font-family: inherit; border: none; background: none; }
input, textarea { font-family: inherit; outline: none; }
ul, ol { list-style: none; }

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

/* ===== 头部 / 导航 ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(226,232,240,0.5);
  z-index: 1000;
  transition: var(--transition);
}
.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 800;
  color: var(--secondary);
  letter-spacing: -0.5px;
}
.logo i { color: var(--primary); font-size: 26px; }
.logo:hover { opacity: 0.85; }
.nav {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-link {
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 500;
  color: var(--text-light);
  transition: var(--transition);
  position: relative;
}
.nav-link:hover {
  color: var(--primary);
  background: var(--primary-bg);
}
.nav-link.active {
  color: var(--primary);
  background: var(--primary-bg);
  font-weight: 600;
}
.nav-cta { margin-left: 12px; }
.nav-toggle { display: none; font-size: 24px; color: var(--secondary); padding: 6px; }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  transition: var(--transition);
  border: 2px solid transparent;
  cursor: pointer;
  line-height: 1.2;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  box-shadow: var(--shadow-btn);
}
.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(220,38,38,0.35);
}
.btn-primary:active { transform: translateY(0); }
.btn-outline {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}
.btn-outline:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-2px);
}
.btn-sm { padding: 8px 20px; font-size: 14px; }
.btn-lg { padding: 16px 36px; font-size: 17px; }

/* ===== 文章页主区 ===== */
.article-page { padding-top: calc(var(--header-h) + 20px); }

/* 面包屑 */
.breadcrumb {
  padding: 20px 0 10px;
  font-size: 14px;
  color: var(--text-light);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}
.breadcrumb a { color: var(--text-light); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { color: #cbd5e1; }

/* 文章主体 */
.article-main {
  padding: 40px 0 60px;
}
.article-header {
  margin-bottom: 36px;
  padding-bottom: 28px;
  border-bottom: 2px solid var(--border);
}
.article-category {
  display: inline-block;
  padding: 4px 16px;
  background: var(--primary-bg);
  color: var(--primary);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
  letter-spacing: 0.3px;
}
.article-title {
  font-size: 32px;
  font-weight: 800;
  line-height: 1.3;
  color: var(--secondary);
  margin-bottom: 16px;
  letter-spacing: -0.3px;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
  font-size: 14px;
  color: var(--text-light);
}
.article-meta i { margin-right: 6px; color: var(--primary); }
.article-meta span { display: flex; align-items: center; }

.article-cover {
  margin-bottom: 32px;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.article-cover img {
  width: 100%;
  height: auto;
  max-height: 480px;
  object-fit: cover;
}

.article-content {
  font-size: 16px;
  line-height: 1.9;
  color: var(--text);
}
.article-content p {
  margin-bottom: 20px;
}
.article-content h2, .article-content h3 {
  margin-top: 36px;
  margin-bottom: 16px;
  font-weight: 700;
  color: var(--secondary);
  line-height: 1.35;
}
.article-content h2 { font-size: 24px; }
.article-content h3 { font-size: 20px; }
.article-content ul, .article-content ol {
  margin-bottom: 20px;
  padding-left: 24px;
}
.article-content li { margin-bottom: 8px; }
.article-content ul li { list-style: disc; }
.article-content ol li { list-style: decimal; }
.article-content a { color: var(--primary); border-bottom: 1px solid transparent; }
.article-content a:hover { border-bottom-color: var(--primary); }
.article-content blockquote {
  margin: 24px 0;
  padding: 20px 24px;
  background: var(--bg-alt);
  border-left: 4px solid var(--primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-light);
  font-style: italic;
}
.article-content img {
  border-radius: var(--radius-sm);
  margin: 24px auto;
}

/* 标签 */
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
.tag {
  display: inline-block;
  padding: 6px 16px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 13px;
  color: var(--text-light);
  transition: var(--transition);
}
.tag:hover {
  background: var(--primary-bg);
  border-color: var(--primary-light);
  color: var(--primary);
}

/* 文章导航 */
.article-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
  margin-top: 48px;
  padding-top: 28px;
  border-top: 2px solid var(--border);
}
.article-nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  background: var(--bg-alt);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  border: 1px solid var(--border);
  transition: var(--transition);
  max-width: 48%;
}
.article-nav a:hover {
  background: var(--primary-bg);
  border-color: var(--primary);
  color: var(--primary);
}
.article-nav .nav-prev { text-align: left; }
.article-nav .nav-next { text-align: right; }

/* 内容未找到 */
.not-found-box {
  text-align: center;
  padding: 80px 24px;
}
.not-found-box .icon-big {
  font-size: 64px;
  color: var(--primary-light);
  margin-bottom: 24px;
}
.not-found-box h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--secondary);
  margin-bottom: 12px;
}
.not-found-box p {
  color: var(--text-light);
  margin-bottom: 28px;
  font-size: 16px;
}

/* ===== 相关推荐 ===== */
.related-section {
  background: var(--bg-alt);
  padding: 60px 0;
}
.related-section .section-title {
  font-size: 26px;
  font-weight: 700;
  color: var(--secondary);
  margin-bottom: 32px;
  text-align: center;
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.related-card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: var(--transition);
}
.related-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.related-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}
.related-card-body {
  padding: 20px;
}
.related-card-body h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--secondary);
  margin-bottom: 8px;
  line-height: 1.4;
}
.related-card-body p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.6;
}
.related-card-body .meta {
  font-size: 13px;
  color: var(--text-light);
  margin-top: 12px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.related-card-body .meta i { color: var(--primary); margin-right: 4px; }

/* ===== CTA 区块 ===== */
.cta-section {
  background: var(--bg-dark);
  padding: 64px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  opacity: 0.10;
  pointer-events: none;
}
.cta-section .container { position: relative; z-index: 1; }
.cta-section h2 {
  font-size: 30px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 14px;
}
.cta-section p {
  color: rgba(255,255,255,0.7);
  font-size: 16px;
  margin-bottom: 28px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}
.cta-section .btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 4px 20px rgba(245,158,11,0.35);
}
.cta-section .btn-primary:hover {
  background: #d97706;
  border-color: #d97706;
}

/* ===== 页脚 ===== */
.footer {
  background: var(--bg-dark);
  color: rgba(255,255,255,0.8);
  padding: 56px 0 0;
  border-top: 1px solid rgba(255,255,255,0.05);
}
.footer .logo { color: #fff; margin-bottom: 16px; }
.footer .logo i { color: var(--primary); }
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.footer-brand p { font-size: 14px; line-height: 1.7; color: rgba(255,255,255,0.55); max-width: 360px; }
.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 20px;
  letter-spacing: 0.3px;
}
.footer-col a {
  display: block;
  font-size: 14px;
  color: rgba(255,255,255,0.55);
  padding: 5px 0;
  transition: var(--transition);
}
.footer-col a:hover { color: var(--primary); padding-left: 4px; }
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  padding: 24px 0;
  gap: 16px;
  font-size: 13px;
  color: rgba(255,255,255,0.4);
}
.footer-social { display: flex; gap: 16px; }
.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  color: rgba(255,255,255,0.5);
  font-size: 18px;
  transition: var(--transition);
}
.footer-social a:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-2px);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 768px) {
  :root { --header-h: 64px; }
  .nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(16px);
    flex-direction: column;
    padding: 16px 24px 24px;
    gap: 4px;
    border-bottom: 1px solid var(--border);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
  }
  .nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav-link { width: 100%; padding: 12px 16px; font-size: 16px; }
  .nav-cta { width: 100%; margin-left: 0; margin-top: 8px; }
  .nav-cta .btn { width: 100%; justify-content: center; }
  .nav-toggle { display: block; }

  .article-title { font-size: 24px; }
  .article-header { margin-bottom: 24px; padding-bottom: 20px; }
  .article-content { font-size: 15px; }
  .article-content h2 { font-size: 20px; }
  .article-content h3 { font-size: 18px; }

  .related-grid { grid-template-columns: 1fr; }
  .cta-section h2 { font-size: 24px; }
  .cta-section p { font-size: 14px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .article-nav { flex-direction: column; }
  .article-nav a { max-width: 100%; }
}

@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .article-title { font-size: 20px; }
  .article-meta { flex-direction: column; gap: 8px; align-items: flex-start; }
  .article-content { font-size: 14px; }
  .article-content h2 { font-size: 18px; }
  .breadcrumb { font-size: 13px; }
  .related-card img { height: 140px; }
  .cta-section { padding: 48px 0; }
  .cta-section h2 { font-size: 20px; }
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --color-primary: #0a0e17;
            --color-primary-light: #1a1f2e;
            --color-secondary: #2a3040;
            --color-accent: #e63946;
            --color-accent-hover: #c1121f;
            --color-accent-glow: rgba(230, 57, 70, 0.25);
            --color-bg: #0d111a;
            --color-bg-card: #141b26;
            --color-bg-section: #101520;
            --color-text: #f0f2f5;
            --color-text-muted: #8a94a6;
            --color-text-dim: #5a6478;
            --color-border: #1e2838;
            --color-border-light: #2a3448;
            --color-success: #2ecc71;
            --color-warning: #f1c40f;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 22px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.5);
            --shadow-accent: 0 4px 24px rgba(230, 57, 70, 0.2);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
            --max-width: 1200px;
            --header-height: 72px;
        }

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

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

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.6;
            color: var(--color-text);
            background: var(--color-bg);
            min-height: 100vh;
        }

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

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }

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

        button {
            cursor: pointer;
            background: none;
        }

        ul,
        ol {
            list-style: none;
        }

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

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Typography ===== */
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.25;
            color: var(--color-text);
        }

        .section-title {
            font-size: 2.2rem;
            margin-bottom: 0.5rem;
            letter-spacing: -0.02em;
        }
        .section-subtitle {
            font-size: 1.1rem;
            color: var(--color-text-muted);
            max-width: 680px;
            margin-bottom: 2.5rem;
        }
        .section-header {
            text-align: center;
            margin-bottom: 3rem;
        }
        .section-header .section-subtitle {
            margin-left: auto;
            margin-right: auto;
        }

        @media (max-width: 768px) {
            .section-title {
                font-size: 1.6rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
            }
        }

        /* ===== Header & Navigation ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(10, 14, 23, 0.92);
            backdrop-filter: blur(14px) saturate(1.3);
            border-bottom: 1px solid var(--color-border);
            height: var(--header-height);
            transition: background var(--transition), border-color var(--transition);
        }

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

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--color-text);
            letter-spacing: -0.03em;
        }
        .logo i {
            color: var(--color-accent);
            font-size: 1.3em;
        }
        .logo:hover {
            color: var(--color-text);
        }

        .nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-link {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--color-text-muted);
            transition: background var(--transition), color var(--transition);
            position: relative;
        }
        .nav-link:hover {
            color: var(--color-text);
            background: rgba(255, 255, 255, 0.04);
        }
        .nav-link.active {
            color: var(--color-text);
            background: rgba(230, 57, 70, 0.12);
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 4px;
            background: var(--color-accent);
        }

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

        .nav-toggle {
            display: none;
            font-size: 1.5rem;
            color: var(--color-text);
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--color-border);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.08);
        }

        @media (max-width: 820px) {
            .nav {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(10, 14, 23, 0.98);
                backdrop-filter: blur(14px);
                flex-direction: column;
                padding: 20px 24px 28px;
                gap: 6px;
                border-bottom: 1px solid var(--color-border);
                transform: translateY(-110%);
                opacity: 0;
                pointer-events: none;
                transition: transform 0.35s ease, opacity 0.3s ease;
            }
            .nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-link {
                width: 100%;
                text-align: left;
                padding: 12px 16px;
                font-size: 1.05rem;
            }
            .nav-link.active::after {
                display: none;
            }
            .nav-cta {
                margin-left: 0;
                margin-top: 10px;
                width: 100%;
            }
            .nav-cta .btn {
                width: 100%;
                justify-content: center;
            }
            .nav-toggle {
                display: block;
            }
        }

        @media (max-width: 480px) {
            .header-inner {
                padding: 0 12px;
            }
            .logo {
                font-size: 1.2rem;
            }
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            transition: background var(--transition), color var(--transition), box-shadow var(--transition), transform var(--transition);
            border: 1px solid transparent;
            cursor: pointer;
            line-height: 1.2;
        }
        .btn:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 3px;
        }

        .btn-primary {
            background: var(--color-accent);
            color: #fff;
            border-color: var(--color-accent);
            box-shadow: var(--shadow-accent);
        }
        .btn-primary:hover {
            background: var(--color-accent-hover);
            color: #fff;
            box-shadow: 0 6px 28px rgba(230, 57, 70, 0.35);
            transform: translateY(-2px);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-accent);
        }

        .btn-outline {
            background: transparent;
            color: var(--color-text);
            border-color: var(--color-border-light);
        }
        .btn-outline:hover {
            border-color: var(--color-accent);
            color: var(--color-accent);
            background: rgba(230, 57, 70, 0.06);
            transform: translateY(-2px);
        }
        .btn-outline:active {
            transform: translateY(0);
        }

        .btn-sm {
            padding: 8px 18px;
            font-size: 0.85rem;
        }
        .btn-lg {
            padding: 16px 36px;
            font-size: 1.1rem;
        }

        /* ===== Hero / Banner ===== */
        .banner {
            margin-top: var(--header-height);
            min-height: 340px;
            display: flex;
            align-items: center;
            position: relative;
            background: var(--color-primary) url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            border-bottom: 1px solid var(--color-border);
            overflow: hidden;
        }
        .banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 14, 23, 0.92) 30%, rgba(10, 14, 23, 0.6) 70%, rgba(230, 57, 70, 0.15) 100%);
            z-index: 1;
        }
        .banner .container {
            position: relative;
            z-index: 2;
            padding-top: 48px;
            padding-bottom: 48px;
        }
        .banner-content {
            max-width: 720px;
        }
        .banner-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 14px;
            border-radius: 100px;
            font-size: 0.8rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            background: rgba(230, 57, 70, 0.18);
            color: var(--color-accent);
            border: 1px solid rgba(230, 57, 70, 0.25);
            margin-bottom: 16px;
        }
        .banner-badge i {
            font-size: 0.7rem;
        }
        .banner h1 {
            font-size: 3rem;
            font-weight: 800;
            letter-spacing: -0.03em;
            margin-bottom: 16px;
            line-height: 1.15;
        }
        .banner h1 span {
            color: var(--color-accent);
        }
        .banner p {
            font-size: 1.15rem;
            color: var(--color-text-muted);
            max-width: 600px;
            margin-bottom: 28px;
            line-height: 1.7;
        }
        .banner-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        @media (max-width: 768px) {
            .banner {
                min-height: 260px;
            }
            .banner h1 {
                font-size: 2rem;
            }
            .banner p {
                font-size: 1rem;
            }
            .banner-content {
                max-width: 100%;
            }
        }
        @media (max-width: 480px) {
            .banner h1 {
                font-size: 1.6rem;
            }
            .banner-actions .btn {
                flex: 1 1 100%;
                justify-content: center;
            }
        }

        /* ===== Section spacing ===== */
        .section {
            padding: 80px 0;
        }
        .section-dark {
            background: var(--color-bg-section);
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
        }
        .section-light {
            background: var(--color-bg-card);
        }

        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }
        }

        /* ===== Cards ===== */
        .card {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
        }
        .card:hover {
            border-color: var(--color-border-light);
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .card-icon {
            width: 52px;
            height: 52px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-md);
            font-size: 1.4rem;
            background: rgba(230, 57, 70, 0.1);
            color: var(--color-accent);
            margin-bottom: 16px;
            border: 1px solid rgba(230, 57, 70, 0.15);
        }
        .card h3 {
            font-size: 1.25rem;
            margin-bottom: 8px;
        }
        .card p {
            color: var(--color-text-muted);
            font-size: 0.95rem;
            line-height: 1.6;
        }
        .card .card-tag {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 100px;
            font-size: 0.75rem;
            font-weight: 600;
            background: rgba(230, 57, 70, 0.1);
            color: var(--color-accent);
            margin-bottom: 12px;
            border: 1px solid rgba(230, 57, 70, 0.15);
        }

        /* ===== Grid ===== */
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .grid-2,
            .grid-3,
            .grid-4 {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

        /* ===== Steps ===== */
        .steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            counter-reset: step-counter;
        }
        .step-item {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            text-align: center;
            position: relative;
            transition: border-color var(--transition), box-shadow var(--transition);
        }
        .step-item:hover {
            border-color: var(--color-border-light);
            box-shadow: var(--shadow-md);
        }
        .step-number {
            width: 48px;
            height: 48px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            font-size: 1.2rem;
            font-weight: 800;
            background: var(--color-accent);
            color: #fff;
            margin: 0 auto 16px;
            font-family: var(--font-mono);
            box-shadow: 0 0 0 4px rgba(230, 57, 70, 0.15);
        }
        .step-item h3 {
            font-size: 1.1rem;
            margin-bottom: 6px;
        }
        .step-item p {
            font-size: 0.9rem;
            color: var(--color-text-muted);
        }
        .step-connector {
            display: none;
        }

        @media (max-width: 1024px) {
            .steps {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .steps {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

        /* ===== Feature Cards (图文混合) ===== */
        .feature-card {
            display: flex;
            gap: 28px;
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 28px;
            transition: border-color var(--transition), box-shadow var(--transition);
            align-items: center;
        }
        .feature-card:hover {
            border-color: var(--color-border-light);
            box-shadow: var(--shadow-md);
        }
        .feature-card .feature-img {
            flex: 0 0 200px;
            height: 140px;
            border-radius: var(--radius-md);
            overflow: hidden;
            background: var(--color-secondary);
        }
        .feature-card .feature-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .feature-card .feature-body {
            flex: 1;
        }
        .feature-card .feature-body h3 {
            font-size: 1.2rem;
            margin-bottom: 6px;
        }
        .feature-card .feature-body p {
            color: var(--color-text-muted);
            font-size: 0.95rem;
        }
        .feature-card .feature-tag {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 100px;
            font-size: 0.72rem;
            font-weight: 600;
            background: rgba(230, 57, 70, 0.1);
            color: var(--color-accent);
            margin-bottom: 8px;
            border: 1px solid rgba(230, 57, 70, 0.15);
        }

        @media (max-width: 768px) {
            .feature-card {
                flex-direction: column;
                padding: 20px;
            }
            .feature-card .feature-img {
                flex: 0 0 auto;
                width: 100%;
                height: 180px;
            }
        }

        /* ===== Tips Grid ===== */
        .tip-card {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
        }
        .tip-card:hover {
            border-color: var(--color-border-light);
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .tip-card .tip-img {
            width: 100%;
            height: 180px;
            overflow: hidden;
            background: var(--color-secondary);
        }
        .tip-card .tip-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .tip-card:hover .tip-img img {
            transform: scale(1.04);
        }
        .tip-card .tip-body {
            padding: 20px 22px 24px;
        }
        .tip-card .tip-body h3 {
            font-size: 1.1rem;
            margin-bottom: 6px;
        }
        .tip-card .tip-body p {
            color: var(--color-text-muted);
            font-size: 0.9rem;
            line-height: 1.6;
        }
        .tip-card .tip-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 12px;
            font-size: 0.8rem;
            color: var(--color-text-dim);
        }
        .tip-card .tip-meta i {
            margin-right: 4px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color var(--transition);
        }
        .faq-item:hover {
            border-color: var(--color-border-light);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--color-text);
            background: none;
            text-align: left;
            gap: 16px;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: rgba(255, 255, 255, 0.02);
        }
        .faq-question i {
            font-size: 1.1rem;
            color: var(--color-accent);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-question[aria-expanded="true"] i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 22px 18px;
            font-size: 0.95rem;
            color: var(--color-text-muted);
            line-height: 1.7;
            display: none;
        }
        .faq-answer.open {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--color-primary) url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            position: relative;
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 14, 23, 0.9) 40%, rgba(230, 57, 70, 0.2) 100%);
            z-index: 1;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 80px 24px;
        }
        .cta-section h2 {
            font-size: 2.4rem;
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: var(--color-text-muted);
            max-width: 560px;
            margin: 0 auto 28px;
        }
        .cta-section .btn {
            font-size: 1.05rem;
            padding: 16px 40px;
        }

        @media (max-width: 768px) {
            .cta-section .container {
                padding: 48px 16px;
            }
            .cta-section h2 {
                font-size: 1.6rem;
            }
            .cta-section p {
                font-size: 0.95rem;
            }
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--color-primary);
            border-top: 1px solid var(--color-border);
            padding: 56px 0 28px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        .footer-brand .logo {
            font-size: 1.3rem;
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            line-height: 1.7;
            max-width: 300px;
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 14px;
            color: var(--color-text);
            text-transform: uppercase;
            letter-spacing: 0.04em;
        }
        .footer-col a {
            display: block;
            font-size: 0.9rem;
            color: var(--color-text-muted);
            padding: 4px 0;
            transition: color var(--transition);
        }
        .footer-col a:hover {
            color: var(--color-accent);
        }
        .footer-bottom {
            border-top: 1px solid var(--color-border);
            padding-top: 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom p {
            font-size: 0.85rem;
            color: var(--color-text-dim);
        }
        .footer-social {
            display: flex;
            gap: 14px;
        }
        .footer-social a {
            width: 38px;
            height: 38px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            font-size: 1rem;
            color: var(--color-text-muted);
            border: 1px solid var(--color-border);
            transition: color var(--transition), border-color var(--transition), background var(--transition);
        }
        .footer-social a:hover {
            color: var(--color-accent);
            border-color: var(--color-accent);
            background: rgba(230, 57, 70, 0.06);
        }

        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .footer-social {
                justify-content: center;
            }
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }
        .text-accent {
            color: var(--color-accent);
        }
        .mt-1 {
            margin-top: 12px;
        }
        .mt-2 {
            margin-top: 24px;
        }
        .mt-3 {
            margin-top: 40px;
        }
        .mb-1 {
            margin-bottom: 12px;
        }
        .mb-2 {
            margin-bottom: 24px;
        }

        .tag-group {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 100px;
            font-size: 0.8rem;
            font-weight: 500;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--color-border);
            color: var(--color-text-muted);
            transition: background var(--transition), color var(--transition), border-color var(--transition);
        }
        .tag:hover {
            background: rgba(230, 57, 70, 0.08);
            color: var(--color-accent);
            border-color: rgba(230, 57, 70, 0.2);
        }

        .divider {
            height: 1px;
            background: var(--color-border);
            margin: 24px 0;
        }

        /* ===== Focus visible ===== */
        :focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
        }

        /* ===== Smooth scroll offset ===== */
        .scroll-offset {
            scroll-margin-top: calc(var(--header-height) + 24px);
        }

        /* ===== Responsive fine-tune ===== */
        @media (max-width: 520px) {
            .banner h1 {
                font-size: 1.4rem;
            }
            .banner p {
                font-size: 0.9rem;
            }
            .btn-lg {
                padding: 14px 24px;
                font-size: 1rem;
            }
            .card {
                padding: 20px 16px;
            }
            .step-item {
                padding: 20px 16px;
            }
            .feature-card {
                padding: 16px;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 16px 14px;
            }
            .footer {
                padding: 32px 0 20px;
            }
        }