/* roulang page: index */
/* ===== 设计变量 ===== */
:root {
  --primary: #2563EB;
  --primary-dark: #1D4ED8;
  --primary-light: #DBEAFE;
  --primary-alpha: rgba(37, 99, 235, 0.08);
  --secondary: #10B981;
  --secondary-dark: #059669;
  --secondary-light: #D1FAE5;
  --accent: #F59E0B;
  --accent-light: #FEF3C7;
  --bg: #F8FAFC;
  --bg-white: #FFFFFF;
  --bg-gray: #F1F5F9;
  --bg-dark: #0F172A;
  --text: #0F172A;
  --text-secondary: #475569;
  --text-muted: #94A3B8;
  --text-white: #FFFFFF;
  --border: #E2E8F0;
  --border-light: #F1F5F9;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 14px rgba(0,0,0,0.08);
  --shadow-lg: 0 10px 40px rgba(0,0,0,0.10);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.12);
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 80px;
  --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-base: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 22px;
  --font-size-2xl: 30px;
  --font-size-3xl: 40px;
  --font-size-4xl: 52px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-dark); }
button { cursor: pointer; font-family: inherit; font-size: inherit; border: none; background: none; }
input, textarea, select { font-family: inherit; font-size: inherit; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text); }
h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }
@media (max-width: 768px) {
  h1 { font-size: var(--font-size-2xl); }
  h2 { font-size: var(--font-size-xl); }
  h3 { font-size: var(--font-size-lg); }
}

/* ===== 容器 ===== */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}
@media (max-width: 768px) {
  .container { padding: 0 var(--space-md); }
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 12px 28px;
  font-size: var(--font-size-base);
  font-weight: 600;
  line-height: 1.4;
  border-radius: var(--radius-full);
  transition: all var(--transition);
  border: 2px solid transparent;
  white-space: nowrap;
}
.btn-primary {
  background: var(--primary);
  color: var(--text-white);
  border-color: var(--primary);
}
.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  color: var(--text-white);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.30);
}
.btn-primary:active { transform: translateY(0); box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25); }
.btn-secondary {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}
.btn-secondary:hover {
  background: var(--primary);
  color: var(--text-white);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.20);
}
.btn-secondary:active { transform: translateY(0); }
.btn-white {
  background: var(--bg-white);
  color: var(--primary);
  border-color: var(--bg-white);
}
.btn-white:hover {
  background: var(--bg-gray);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.12);
}
.btn-lg { padding: 16px 36px; font-size: var(--font-size-lg); }
.btn-sm { padding: 8px 18px; font-size: var(--font-size-sm); }
.btn:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; }

/* ===== 标签 / 徽章 ===== */
.badge {
  display: inline-block;
  padding: 4px 14px;
  font-size: var(--font-size-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
  background: var(--primary-light);
  color: var(--primary);
  letter-spacing: 0.3px;
}
.badge-green { background: var(--secondary-light); color: var(--secondary-dark); }
.badge-yellow { background: var(--accent-light); color: #B45309; }
.badge-gray { background: var(--bg-gray); color: var(--text-secondary); }

/* ===== 导航 ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}
.header .container {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  height: 72px;
}
.logo {
  font-size: var(--font-size-xl);
  font-weight: 800;
  color: var(--text);
  white-space: nowrap;
  flex-shrink: 0;
}
.logo span { color: var(--primary); }
.logo:hover { color: var(--text); }
.nav-search {
  flex: 1;
  max-width: 480px;
  position: relative;
  margin: 0 auto;
}
.nav-search input {
  width: 100%;
  padding: 10px 18px 10px 44px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-full);
  background: var(--bg);
  color: var(--text);
  font-size: var(--font-size-sm);
  transition: all var(--transition);
  outline: none;
}
.nav-search input:focus {
  border-color: var(--primary);
  background: var(--bg-white);
  box-shadow: 0 0 0 4px var(--primary-alpha);
}
.nav-search input::placeholder { color: var(--text-muted); }
.nav-search .search-icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: var(--font-size-sm);
  pointer-events: none;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  flex-shrink: 0;
}
.nav-links a {
  padding: 8px 18px;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-full);
  transition: all var(--transition);
  white-space: nowrap;
}
.nav-links a:hover { color: var(--primary); background: var(--primary-alpha); }
.nav-links a.active { color: var(--primary); background: var(--primary-light); font-weight: 600; }
.nav-toggle { display: none; font-size: 24px; color: var(--text); padding: 8px; cursor: pointer; }

@media (max-width: 768px) {
  .header .container { height: 64px; gap: var(--space-md); }
  .nav-search { max-width: 200px; }
  .nav-search input { padding: 8px 12px 8px 36px; font-size: var(--font-size-xs); }
  .nav-search .search-icon { left: 12px; font-size: var(--font-size-xs); }
  .nav-links { display: none; position: absolute; top: 64px; left: 0; right: 0; background: var(--bg-white); border-bottom: 1px solid var(--border); flex-direction: column; padding: var(--space-md); gap: var(--space-xs); box-shadow: var(--shadow-lg); }
  .nav-links.open { display: flex; }
  .nav-links a { width: 100%; padding: 12px 18px; }
  .nav-toggle { display: block; }
}
@media (max-width: 520px) {
  .nav-search { max-width: 140px; }
  .logo { font-size: var(--font-size-lg); }
}

/* ===== Hero 首屏 ===== */
.hero {
  position: relative;
  min-height: 620px;
  display: flex;
  align-items: center;
  background: var(--bg-dark) url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  isolation: isolate;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15,23,42,0.80) 0%, rgba(37,99,235,0.50) 100%);
  z-index: 1;
}
.hero .container { position: relative; z-index: 2; padding: var(--space-4xl) var(--space-lg); }
.hero-content { max-width: 680px; }
.hero .badge { margin-bottom: var(--space-lg); background: rgba(255,255,255,0.15); color: var(--text-white); backdrop-filter: blur(4px); }
.hero h1 { font-size: var(--font-size-4xl); color: var(--text-white); margin-bottom: var(--space-lg); letter-spacing: -0.5px; }
.hero h1 span { color: #60A5FA; }
.hero p { font-size: var(--font-size-lg); color: rgba(255,255,255,0.85); line-height: 1.8; margin-bottom: var(--space-2xl); max-width: 540px; }
.hero-actions { display: flex; gap: var(--space-md); flex-wrap: wrap; }

@media (max-width: 768px) {
  .hero { min-height: 480px; }
  .hero .container { padding: var(--space-3xl) var(--space-md); }
  .hero h1 { font-size: var(--font-size-2xl); }
  .hero p { font-size: var(--font-size-base); }
  .hero-actions { flex-direction: column; align-items: flex-start; }
  .hero-actions .btn { width: 100%; justify-content: center; }
}
@media (max-width: 520px) {
  .hero { min-height: 400px; }
  .hero h1 { font-size: var(--font-size-xl); }
}

/* ===== 通用板块 ===== */
.section { padding: var(--space-4xl) 0; }
.section-alt { background: var(--bg-white); }
.section-gray { background: var(--bg-gray); }
.section-dark { background: var(--bg-dark); color: var(--text-white); }
.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--space-3xl);
}
.section-header .badge { margin-bottom: var(--space-md); }
.section-header h2 { margin-bottom: var(--space-md); }
.section-header p { color: var(--text-secondary); font-size: var(--font-size-lg); }
.section-dark .section-header h2 { color: var(--text-white); }
.section-dark .section-header p { color: rgba(255,255,255,0.75); }

/* ===== 关于板块 ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}
.about-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.about-image img { width: 100%; height: 380px; object-fit: cover; transition: transform 0.6s ease; }
.about-image:hover img { transform: scale(1.03); }
.about-text h3 { font-size: var(--font-size-xl); margin-bottom: var(--space-md); }
.about-text p { color: var(--text-secondary); margin-bottom: var(--space-lg); line-height: 1.8; }
.about-features { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-md); margin-top: var(--space-lg); }
.about-feature { display: flex; align-items: flex-start; gap: var(--space-sm); }
.about-feature i { color: var(--secondary); font-size: var(--font-size-lg); margin-top: 2px; flex-shrink: 0; }
.about-feature span { font-size: var(--font-size-sm); color: var(--text-secondary); }
@media (max-width: 768px) {
  .about-grid { grid-template-columns: 1fr; gap: var(--space-2xl); }
  .about-image img { height: 260px; }
  .about-features { grid-template-columns: 1fr; }
}

/* ===== 分类入口 ===== */
.categories-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}
.category-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-white);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  border: 1px solid var(--border);
}
.category-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-light);
}
.category-card .card-img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  transition: transform 0.6s ease;
}
.category-card:hover .card-img { transform: scale(1.05); }
.category-card .card-body { padding: var(--space-lg); }
.category-card .card-body h3 { font-size: var(--font-size-lg); margin-bottom: var(--space-sm); }
.category-card .card-body p { font-size: var(--font-size-sm); color: var(--text-secondary); margin-bottom: var(--space-md); line-height: 1.7; }
.category-card .card-footer { display: flex; align-items: center; justify-content: space-between; padding: 0 var(--space-lg) var(--space-lg); }
.category-card .card-footer .btn { font-size: var(--font-size-sm); padding: 8px 20px; }
@media (max-width: 768px) {
  .categories-grid { grid-template-columns: 1fr; }
  .category-card .card-img { height: 180px; }
}
@media (max-width: 520px) {
  .category-card .card-img { height: 150px; }
}

/* ===== 最新资讯 (CMS) ===== */
.latest-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}
.post-card {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}
.post-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.post-card .post-img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.post-card:hover .post-img { transform: scale(1.04); }
.post-card .post-body { padding: var(--space-lg); }
.post-card .post-meta { display: flex; align-items: center; gap: var(--space-sm); margin-bottom: var(--space-sm); font-size: var(--font-size-xs); color: var(--text-muted); }
.post-card .post-meta .badge { font-size: 11px; padding: 2px 10px; }
.post-card .post-body h3 { font-size: var(--font-size-base); margin-bottom: var(--space-sm); line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.post-card .post-body h3 a { color: var(--text); }
.post-card .post-body h3 a:hover { color: var(--primary); }
.post-card .post-body p { font-size: var(--font-size-sm); color: var(--text-secondary); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; line-height: 1.7; }
.post-card .post-body .post-date { font-size: var(--font-size-xs); color: var(--text-muted); margin-top: var(--space-sm); }
.empty-msg { grid-column: 1 / -1; text-align: center; padding: var(--space-3xl); color: var(--text-muted); font-size: var(--font-size-lg); background: var(--bg-gray); border-radius: var(--radius-md); }
@media (max-width: 1024px) {
  .latest-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .latest-grid { grid-template-columns: 1fr; }
  .post-card .post-img { height: 200px; }
}

/* ===== 数据统计 ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}
.stat-item {
  text-align: center;
  padding: var(--space-2xl) var(--space-lg);
  background: var(--bg-white);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.stat-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.stat-icon { font-size: 36px; color: var(--primary); margin-bottom: var(--space-md); }
.stat-number { font-size: var(--font-size-3xl); font-weight: 800; color: var(--text); line-height: 1.2; margin-bottom: var(--space-xs); }
.stat-label { font-size: var(--font-size-sm); color: var(--text-secondary); }
@media (max-width: 768px) {
  .stats-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 520px) {
  .stats-grid { grid-template-columns: 1fr; }
  .stat-item { padding: var(--space-xl); }
}

/* ===== 服务流程 ===== */
.process-steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-md);
  counter-reset: step;
}
.process-step {
  text-align: center;
  padding: var(--space-xl) var(--space-md);
  background: var(--bg-white);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  position: relative;
  transition: all var(--transition);
}
.process-step:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.process-step .step-num {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  font-size: var(--font-size-lg);
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-md);
}
.process-step .step-icon { font-size: 28px; color: var(--primary); margin-bottom: var(--space-sm); }
.process-step h4 { font-size: var(--font-size-base); margin-bottom: var(--space-xs); }
.process-step p { font-size: var(--font-size-sm); color: var(--text-secondary); line-height: 1.6; }
.process-arrow { display: flex; align-items: center; justify-content: center; font-size: 24px; color: var(--text-muted); }
@media (max-width: 1024px) {
  .process-steps { grid-template-columns: repeat(3, 1fr); }
  .process-arrow { display: none; }
}
@media (max-width: 768px) {
  .process-steps { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 520px) {
  .process-steps { grid-template-columns: 1fr; }
}

/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: var(--space-md); }
.faq-item {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: box-shadow var(--transition);
}
.faq-item:hover { box-shadow: var(--shadow-sm); }
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg);
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  background: none;
  width: 100%;
  text-align: left;
  transition: background var(--transition);
}
.faq-question:hover { background: var(--bg-gray); }
.faq-question i { font-size: var(--font-size-sm); color: var(--text-muted); transition: transform var(--transition); }
.faq-item.active .faq-question i { transform: rotate(180deg); }
.faq-answer {
  padding: 0 var(--space-lg) var(--space-lg);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.8;
  display: none;
}
.faq-item.active .faq-answer { display: block; }
@media (max-width: 768px) {
  .faq-question { padding: var(--space-md); font-size: var(--font-size-sm); }
  .faq-answer { padding: 0 var(--space-md) var(--space-md); }
}

/* ===== CTA ===== */
.cta-section {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  text-align: center;
  padding: var(--space-4xl) 0;
}
.cta-section h2 { color: var(--text-white); font-size: var(--font-size-3xl); margin-bottom: var(--space-md); }
.cta-section p { color: rgba(255,255,255,0.85); font-size: var(--font-size-lg); margin-bottom: var(--space-2xl); max-width: 600px; margin-left: auto; margin-right: auto; }
.cta-section .btn-white { font-size: var(--font-size-lg); padding: 16px 40px; }
.cta-section .btn-white:hover { background: var(--bg-white); transform: translateY(-3px); box-shadow: 0 12px 32px rgba(0,0,0,0.20); }
@media (max-width: 768px) {
  .cta-section { padding: var(--space-3xl) 0; }
  .cta-section h2 { font-size: var(--font-size-xl); }
  .cta-section p { font-size: var(--font-size-base); }
}

/* ===== 页脚 ===== */
.footer {
  background: var(--bg-dark);
  color: rgba(255,255,255,0.7);
  padding: var(--space-4xl) 0 var(--space-xl);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-3xl);
}
.footer-brand .logo { color: var(--text-white); margin-bottom: var(--space-md); display: inline-block; }
.footer-brand p { font-size: var(--font-size-sm); line-height: 1.8; max-width: 320px; }
.footer h4 { color: var(--text-white); font-size: var(--font-size-base); margin-bottom: var(--space-lg); }
.footer-links a {
  display: block;
  padding: 6px 0;
  font-size: var(--font-size-sm);
  color: rgba(255,255,255,0.6);
  transition: all var(--transition);
}
.footer-links a:hover { color: var(--text-white); transform: translateX(4px); }
.footer-contact p { font-size: var(--font-size-sm); margin-bottom: var(--space-sm); display: flex; align-items: center; gap: var(--space-sm); }
.footer-contact i { width: 18px; color: var(--primary); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-md);
  font-size: var(--font-size-sm);
}
.footer-social { display: flex; gap: var(--space-sm); }
.footer-social a {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  color: rgba(255,255,255,0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-base);
  transition: all var(--transition);
}
.footer-social a:hover { background: var(--primary); color: var(--text-white); transform: translateY(-2px); }
@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--space-xl); }
  .footer-brand { grid-column: 1 / -1; }
  .footer-bottom { flex-direction: column; text-align: center; }
}
@media (max-width: 520px) {
  .footer-grid { grid-template-columns: 1fr; }
}

/* ===== 实用工具 ===== */
.text-center { text-align: center; }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mt-2xl { margin-top: var(--space-2xl); }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.flex-center { display: flex; align-items: center; justify-content: center; }

/* focus-visible 全局 */
:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; }

/* 滚动条美化 */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-gray); }
::-webkit-scrollbar-thumb { background: var(--text-muted); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-secondary); }

/* 页面过渡 */
.fade-in { animation: fadeIn 0.6s ease forwards; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }

/* roulang page: category1 */
/* ===================== :root 设计变量 ===================== */
        :root {
            --primary: #1a6b5a;
            --primary-light: #219a7a;
            --primary-dark: #0e4d40;
            --primary-bg: #e8f5f0;
            --secondary: #f5a623;
            --secondary-light: #ffc44d;
            --accent: #e74c5e;
            --bg: #ffffff;
            --bg-alt: #f8faf9;
            --bg-card: #ffffff;
            --text: #1a2b3c;
            --text-light: #5a6b7c;
            --text-muted: #8a9baa;
            --border: #e2e8f0;
            --border-light: #f0f4f8;
            --radius: 16px;
            --radius-sm: 8px;
            --radius-lg: 24px;
            --shadow-sm: 0 2px 8px rgba(26, 107, 90, 0.06);
            --shadow: 0 8px 30px rgba(26, 107, 90, 0.08);
            --shadow-lg: 0 20px 60px rgba(26, 107, 90, 0.12);
            --shadow-hover: 0 16px 48px rgba(26, 107, 90, 0.14);
            --space-xs: 4px;
            --space-sm: 8px;
            --space-md: 16px;
            --space-lg: 32px;
            --space-xl: 48px;
            --space-2xl: 80px;
            --font-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
        }

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

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

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

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

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-light);
        }
        a:focus-visible {
            outline: 3px solid var(--primary);
            outline-offset: 2px;
            border-radius: 2px;
        }

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

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

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

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

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

        /* ===================== Header / Navigation ===================== */
        .header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 1px 4px rgba(26, 107, 90, 0.04);
            transition: background var(--transition), box-shadow var(--transition);
        }

        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: var(--space-md);
        }

        .logo {
            font-size: 24px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.5px;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .logo span {
            color: var(--primary);
        }
        .logo:hover {
            color: var(--text);
        }

        .nav-search {
            flex: 1;
            max-width: 480px;
            position: relative;
            margin: 0 var(--space-md);
        }
        .nav-search .search-icon {
            position: absolute;
            left: 16px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            font-size: 15px;
            pointer-events: none;
        }
        .nav-search input {
            width: 100%;
            padding: 10px 16px 10px 44px;
            border-radius: 40px;
            background: var(--bg-alt);
            border: 1.5px solid var(--border);
            font-size: 15px;
            color: var(--text);
            transition: border-color var(--transition), box-shadow var(--transition);
        }
        .nav-search input::placeholder {
            color: var(--text-muted);
        }
        .nav-search input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 4px rgba(26, 107, 90, 0.1);
            background: #fff;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: var(--space-xs);
            flex-shrink: 0;
        }
        .nav-links a {
            padding: 8px 18px;
            border-radius: 40px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-light);
            transition: background var(--transition), color var(--transition);
            white-space: nowrap;
        }
        .nav-links a:hover {
            background: var(--primary-bg);
            color: var(--primary);
        }
        .nav-links a.active {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
        }
        .nav-links a.active:hover {
            background: var(--primary-dark);
            color: #fff;
        }

        .nav-toggle {
            display: none;
            font-size: 22px;
            color: var(--text);
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            background: var(--bg-alt);
            border: 1px solid var(--border);
            transition: background var(--transition);
            flex-shrink: 0;
        }
        .nav-toggle:hover {
            background: var(--border-light);
        }

        @media (max-width: 900px) {
            .nav-search {
                max-width: 280px;
            }
            .nav-links a {
                padding: 6px 14px;
                font-size: 14px;
            }
        }

        @media (max-width: 768px) {
            .header .container {
                height: 64px;
            }
            .nav-search {
                max-width: 200px;
                margin: 0 var(--space-sm);
            }
            .nav-search input {
                padding: 8px 12px 8px 38px;
                font-size: 14px;
            }
            .nav-links {
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                -webkit-backdrop-filter: blur(12px);
                flex-direction: column;
                padding: var(--space-md) var(--space-lg);
                gap: var(--space-sm);
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: transform 0.4s ease, opacity 0.4s ease;
                border-radius: 0 0 var(--radius-lg) var(--radius-lg);
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-links a {
                width: 100%;
                text-align: center;
                padding: 12px 16px;
                font-size: 16px;
                border-radius: var(--radius);
            }
            .nav-toggle {
                display: block;
            }
        }

        @media (max-width: 520px) {
            .nav-search {
                max-width: 140px;
            }
            .nav-search input {
                padding: 6px 10px 6px 32px;
                font-size: 13px;
            }
            .nav-search .search-icon {
                left: 12px;
                font-size: 13px;
            }
            .logo {
                font-size: 20px;
            }
        }

        /* ===================== Banner / Hero (内页) ===================== */
        .page-banner {
            position: relative;
            padding: var(--space-2xl) 0 var(--space-xl);
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: center;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .page-banner h1 {
            font-size: 44px;
            font-weight: 800;
            color: #fff;
            margin-bottom: var(--space-md);
            letter-spacing: -1px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
        }
        .page-banner p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 640px;
            margin: 0 auto var(--space-lg);
            line-height: 1.7;
        }
        .page-banner .banner-tags {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: var(--space-sm);
        }
        .page-banner .banner-tags a {
            display: inline-block;
            padding: 6px 18px;
            border-radius: 40px;
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
            font-size: 14px;
            font-weight: 500;
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255, 255, 255, 0.2);
            transition: background var(--transition), transform var(--transition);
        }
        .page-banner .banner-tags a:hover {
            background: rgba(255, 255, 255, 0.28);
            transform: translateY(-2px);
        }

        @media (max-width: 768px) {
            .page-banner {
                padding: var(--space-xl) 0 var(--space-lg);
                min-height: 240px;
            }
            .page-banner h1 {
                font-size: 30px;
            }
            .page-banner p {
                font-size: 16px;
            }
        }

        @media (max-width: 520px) {
            .page-banner h1 {
                font-size: 26px;
            }
            .page-banner p {
                font-size: 15px;
            }
        }

        /* ===================== Main / 板块通用 ===================== */
        .section {
            padding: var(--space-2xl) 0;
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-title {
            font-size: 34px;
            font-weight: 800;
            color: var(--text);
            text-align: center;
            margin-bottom: var(--space-sm);
            letter-spacing: -0.5px;
        }
        .section-subtitle {
            font-size: 17px;
            color: var(--text-light);
            text-align: center;
            max-width: 600px;
            margin: 0 auto var(--space-xl);
            line-height: 1.6;
        }

        @media (max-width: 768px) {
            .section {
                padding: var(--space-xl) 0;
            }
            .section-title {
                font-size: 26px;
            }
            .section-subtitle {
                font-size: 15px;
                margin-bottom: var(--space-lg);
            }
        }

        /* ===================== 分类文章卡片网格 ===================== */
        .article-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--space-lg);
        }

        .article-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
            display: flex;
            flex-direction: column;
        }
        .article-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .article-card .card-img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
            border-radius: 0;
        }
        .article-card .card-body {
            padding: var(--space-lg);
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .article-card .card-tag {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 40px;
            background: var(--primary-bg);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            margin-bottom: var(--space-sm);
            align-self: flex-start;
        }
        .article-card .card-title {
            font-size: 19px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: var(--space-sm);
            line-height: 1.4;
            transition: color var(--transition);
        }
        .article-card .card-title a {
            color: inherit;
        }
        .article-card .card-title a:hover {
            color: var(--primary);
        }
        .article-card .card-excerpt {
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.7;
            flex: 1;
            margin-bottom: var(--space-md);
        }
        .article-card .card-meta {
            display: flex;
            align-items: center;
            gap: var(--space-md);
            font-size: 13px;
            color: var(--text-muted);
            border-top: 1px solid var(--border-light);
            padding-top: var(--space-md);
            margin-top: auto;
        }
        .article-card .card-meta i {
            margin-right: 4px;
        }

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

        @media (max-width: 600px) {
            .article-grid {
                grid-template-columns: 1fr;
            }
            .article-card .card-body {
                padding: var(--space-md);
            }
            .article-card .card-title {
                font-size: 17px;
            }
        }

        /* ===================== 精选分类板块 ===================== */
        .cat-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--space-md);
        }
        .cat-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: var(--space-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            text-align: center;
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .cat-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow);
        }
        .cat-item .cat-icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            background: var(--primary-bg);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            margin: 0 auto var(--space-md);
            transition: background var(--transition), color var(--transition);
        }
        .cat-item:hover .cat-icon {
            background: var(--primary);
            color: #fff;
        }
        .cat-item .cat-name {
            font-size: 17px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: var(--space-xs);
        }
        .cat-item .cat-count {
            font-size: 14px;
            color: var(--text-muted);
        }

        @media (max-width: 900px) {
            .cat-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .cat-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===================== 流程步骤 ===================== */
        .steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--space-lg);
            counter-reset: step;
        }
        .step-item {
            text-align: center;
            position: relative;
            padding: var(--space-lg) var(--space-md);
        }
        .step-item::after {
            content: '';
            position: absolute;
            top: 40px;
            right: -16px;
            width: 32px;
            height: 2px;
            background: var(--border);
        }
        .step-item:last-child::after {
            display: none;
        }
        .step-number {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            font-weight: 800;
            margin: 0 auto var(--space-md);
            box-shadow: 0 8px 24px rgba(26, 107, 90, 0.2);
        }
        .step-item h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: var(--space-sm);
            color: var(--text);
        }
        .step-item p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
        }

        @media (max-width: 900px) {
            .steps {
                grid-template-columns: repeat(2, 1fr);
                gap: var(--space-md);
            }
            .step-item::after {
                display: none;
            }
        }
        @media (max-width: 520px) {
            .steps {
                grid-template-columns: 1fr;
            }
            .step-item {
                padding: var(--space-md) var(--space-sm);
            }
        }

        /* ===================== FAQ ===================== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: var(--space-sm);
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: var(--space-md) var(--space-lg);
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            text-align: left;
            background: none;
            border: none;
            cursor: pointer;
            gap: var(--space-md);
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: var(--bg-alt);
        }
        .faq-question i {
            font-size: 14px;
            color: var(--text-muted);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .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 var(--space-lg);
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 var(--space-lg) var(--space-lg);
        }
        .faq-answer p {
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.7;
        }

        @media (max-width: 600px) {
            .faq-question {
                padding: var(--space-md);
                font-size: 15px;
            }
            .faq-answer {
                padding: 0 var(--space-md);
            }
            .faq-item.active .faq-answer {
                padding: 0 var(--space-md) var(--space-md);
            }
        }

        /* ===================== CTA ===================== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            padding: var(--space-2xl) 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 center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 34px;
            font-weight: 800;
            color: #fff;
            margin-bottom: var(--space-md);
        }
        .cta-section p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 560px;
            margin: 0 auto var(--space-lg);
        }
        .cta-section .btn-group {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: var(--space-md);
        }
        .btn-primary,
        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            gap: var(--space-sm);
            padding: 14px 36px;
            border-radius: 40px;
            font-size: 16px;
            font-weight: 600;
            transition: background var(--transition), color var(--transition), transform var(--transition), box-shadow var(--transition);
        }
        .btn-primary {
            background: var(--secondary);
            color: var(--text);
            box-shadow: 0 4px 16px rgba(245, 166, 35, 0.3);
        }
        .btn-primary:hover {
            background: var(--secondary-light);
            color: var(--text);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(245, 166, 35, 0.35);
        }
        .btn-outline-light {
            border: 2px solid rgba(255, 255, 255, 0.4);
            color: #fff;
            background: transparent;
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
            border-color: rgba(255, 255, 255, 0.7);
            transform: translateY(-2px);
        }

        @media (max-width: 768px) {
            .cta-section {
                padding: var(--space-xl) 0;
            }
            .cta-section h2 {
                font-size: 26px;
            }
            .btn-primary,
            .btn-outline-light {
                padding: 12px 28px;
                font-size: 15px;
            }
        }

        /* ===================== Footer ===================== */
        .footer {
            background: #0f1a1e;
            color: rgba(255, 255, 255, 0.7);
            padding: var(--space-2xl) 0 var(--space-lg);
        }
        .footer .logo {
            color: #fff;
            font-size: 22px;
            display: inline-block;
            margin-bottom: var(--space-md);
        }
        .footer .logo span {
            color: var(--secondary);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: var(--space-xl);
            margin-bottom: var(--space-xl);
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.55);
            margin-top: var(--space-sm);
        }
        .footer-links h4,
        .footer-contact h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: var(--space-md);
        }
        .footer-links a {
            display: block;
            color: rgba(255, 255, 255, 0.55);
            padding: 4px 0;
            font-size: 14px;
            transition: color var(--transition), padding-left var(--transition);
        }
        .footer-links a:hover {
            color: var(--secondary);
            padding-left: 6px;
        }
        .footer-contact p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            margin-bottom: var(--space-sm);
            display: flex;
            align-items: center;
            gap: var(--space-sm);
        }
        .footer-contact p i {
            width: 18px;
            color: var(--secondary);
        }
        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.6);
            font-size: 16px;
            margin-right: var(--space-sm);
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }
        .footer-social a:hover {
            background: var(--secondary);
            color: #0f1a1e;
            transform: translateY(-3px);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: var(--space-lg);
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: var(--space-md);
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a:hover {
            color: var(--secondary);
        }

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

        /* ===================== 额外组件 ===================== */
        .text-center {
            text-align: center;
        }
        .mt-lg {
            margin-top: var(--space-lg);
        }
        .mb-lg {
            margin-bottom: var(--space-lg);
        }

        /* ===================== 分页 ===================== */
        .pagination {
            display: flex;
            justify-content: center;
            gap: var(--space-sm);
            margin-top: var(--space-xl);
            flex-wrap: wrap;
        }
        .pagination a,
        .pagination span {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 42px;
            height: 42px;
            padding: 0 14px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-light);
            background: var(--bg-card);
            border: 1px solid var(--border);
            transition: background var(--transition), color var(--transition), border-color var(--transition);
        }
        .pagination a:hover {
            background: var(--primary-bg);
            color: var(--primary);
            border-color: var(--primary);
        }
        .pagination .active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .pagination .disabled {
            opacity: 0.4;
            pointer-events: none;
        }

/* roulang page: article */
:root {
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --primary-light: #dbeafe;
  --secondary: #f59e0b;
  --accent: #10b981;
  --bg: #ffffff;
  --bg-alt: #f8fafc;
  --bg-card: #ffffff;
  --text: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --shadow: 0 4px 24px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.10);
  --shadow-hover: 0 12px 32px rgba(37,99,235,0.12);
  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 40px;
  --space-xl: 64px;
  --space-2xl: 96px;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
  --container: 1200px;
  --header-h: 72px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body { font-family: var(--font-sans); color: var(--text); background: var(--bg); line-height: 1.7; font-size: 16px; }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; display: block; }
button, input, textarea { font-family: inherit; font-size: inherit; }
input:focus, textarea:focus, button:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
ul, ol { list-style: none; }
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 var(--space-md); }

/* 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(16px); -webkit-backdrop-filter: blur(16px); border-bottom: 1px solid var(--border); transition: var(--transition); }
.header .container { display: flex; align-items: center; height: 100%; gap: var(--space-md); }
.logo { font-size: 1.5rem; font-weight: 800; color: var(--text); letter-spacing: -0.02em; flex-shrink: 0; }
.logo span { color: var(--primary); }
.logo:hover { color: var(--text); }
.nav-search { flex: 1; max-width: 420px; position: relative; margin: 0 var(--space-sm); }
.nav-search .search-icon { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); color: var(--text-muted); font-size: 0.95rem; pointer-events: none; }
.nav-search input { width: 100%; height: 42px; padding: 0 16px 0 42px; border: 1px solid var(--border); border-radius: 24px; background: var(--bg-alt); color: var(--text); font-size: 0.9rem; transition: var(--transition); }
.nav-search input::placeholder { color: var(--text-muted); }
.nav-search input:focus { border-color: var(--primary); background: var(--bg); box-shadow: 0 0 0 4px rgba(37,99,235,0.10); outline: none; }
.nav-links { display: flex; align-items: center; gap: var(--space-xs); flex-shrink: 0; }
.nav-links a { padding: 8px 18px; border-radius: 24px; font-size: 0.9rem; font-weight: 500; color: var(--text-secondary); transition: var(--transition); white-space: nowrap; }
.nav-links a:hover { color: var(--primary); background: var(--primary-light); }
.nav-links a.active { color: #fff; background: var(--primary); }
.nav-toggle { display: none; background: none; border: none; font-size: 1.4rem; color: var(--text); cursor: pointer; padding: 4px 8px; border-radius: var(--radius-sm); transition: var(--transition); flex-shrink: 0; }
.nav-toggle:hover { background: var(--bg-alt); }
@media (max-width: 820px) {
  .nav-search { max-width: 200px; }
  .nav-links a { padding: 6px 14px; font-size: 0.85rem; }
}
@media (max-width: 720px) {
  .nav-search { display: none; }
  .nav-links { 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: var(--space-sm) var(--space-md); gap: var(--space-xs); border-bottom: 1px solid var(--border); transform: translateY(-120%); opacity: 0; pointer-events: none; transition: var(--transition); box-shadow: var(--shadow); }
  .nav-links.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-links a { width: 100%; padding: 12px 16px; border-radius: var(--radius-sm); font-size: 1rem; }
  .nav-toggle { display: block; }
  .header .container { justify-content: space-between; }
}

/* Main Article */
.article-banner { padding-top: calc(var(--header-h) + var(--space-lg)); padding-bottom: var(--space-lg); background: var(--bg-alt); border-bottom: 1px solid var(--border-light); }
.article-banner .container { max-width: 820px; }
.article-meta { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-sm); margin-bottom: var(--space-sm); font-size: 0.9rem; color: var(--text-secondary); }
.article-meta .category { display: inline-block; padding: 4px 14px; border-radius: 20px; background: var(--primary-light); color: var(--primary); font-size: 0.8rem; font-weight: 600; }
.article-meta .date { color: var(--text-muted); }
.article-banner h1 { font-size: 2.2rem; font-weight: 800; line-height: 1.3; letter-spacing: -0.02em; color: var(--text); margin-bottom: var(--space-sm); }
.article-banner .desc { font-size: 1.1rem; color: var(--text-secondary); line-height: 1.6; }
.article-main { padding: var(--space-xl) 0 var(--space-2xl); background: var(--bg); }
.article-main .container { max-width: 820px; }
.article-body { font-size: 1.05rem; line-height: 1.9; color: var(--text); }
.article-body p { margin-bottom: 1.4em; }
.article-body h2 { font-size: 1.6rem; font-weight: 700; margin: 1.6em 0 0.6em; color: var(--text); letter-spacing: -0.01em; }
.article-body h3 { font-size: 1.25rem; font-weight: 600; margin: 1.4em 0 0.5em; color: var(--text); }
.article-body ul, .article-body ol { margin: 1em 0 1.4em; padding-left: 1.6em; }
.article-body li { margin-bottom: 0.5em; list-style: disc; }
.article-body ol li { list-style: decimal; }
.article-body a { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }
.article-body a:hover { color: var(--primary-dark); }
.article-body blockquote { border-left: 4px solid var(--primary); background: var(--bg-alt); padding: 1em 1.4em; margin: 1.4em 0; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; color: var(--text-secondary); font-style: italic; }
.article-body img { border-radius: var(--radius); margin: 1.6em 0; box-shadow: var(--shadow); }
.article-body pre { background: #1e293b; color: #e2e8f0; padding: 1.2em 1.4em; border-radius: var(--radius); overflow-x: auto; font-size: 0.9rem; margin: 1.4em 0; }
.article-body code { font-family: 'JetBrains Mono', 'Fira Code', monospace; font-size: 0.9em; background: #f1f5f9; padding: 0.2em 0.6em; border-radius: 4px; }
.article-body pre code { background: none; padding: 0; border-radius: 0; }
.article-tags { display: flex; flex-wrap: wrap; gap: var(--space-xs); margin-top: var(--space-lg); padding-top: var(--space-md); border-top: 1px solid var(--border); }
.article-tags .tag { display: inline-block; padding: 6px 16px; border-radius: 20px; background: var(--bg-alt); color: var(--text-secondary); font-size: 0.85rem; font-weight: 500; transition: var(--transition); }
.article-tags .tag:hover { background: var(--primary-light); color: var(--primary); }
.article-nav { display: flex; justify-content: space-between; gap: var(--space-md); margin-top: var(--space-xl); padding-top: var(--space-md); border-top: 1px solid var(--border); }
.article-nav a { flex: 1; padding: var(--space-sm) var(--space-md); border: 1px solid var(--border); border-radius: var(--radius); transition: var(--transition); font-size: 0.95rem; display: flex; align-items: center; gap: var(--space-xs); color: var(--text-secondary); }
.article-nav a:hover { border-color: var(--primary); color: var(--primary); box-shadow: var(--shadow-hover); transform: translateY(-2px); }
.article-nav .next { justify-content: flex-end; text-align: right; }
.not-found { text-align: center; padding: var(--space-2xl) 0; }
.not-found i { font-size: 3rem; color: var(--text-muted); margin-bottom: var(--space-md); }
.not-found h2 { font-size: 1.6rem; margin-bottom: var(--space-sm); }
.not-found p { color: var(--text-secondary); margin-bottom: var(--space-md); }
.not-found .btn { display: inline-block; padding: 12px 32px; border-radius: 30px; background: var(--primary); color: #fff; font-weight: 600; font-size: 1rem; transition: var(--transition); }
.not-found .btn:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: var(--shadow-hover); }

/* Footer */
.footer { background: #0f172a; color: rgba(255,255,255,0.8); padding: var(--space-xl) 0 0; margin-top: var(--space-2xl); }
.footer .container { max-width: var(--container); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.2fr; gap: var(--space-lg); margin-bottom: var(--space-lg); }
.footer-brand .logo { color: #fff; font-size: 1.4rem; }
.footer-brand p { margin-top: var(--space-sm); font-size: 0.9rem; line-height: 1.7; color: rgba(255,255,255,0.55); max-width: 340px; }
.footer-links h4 { color: #fff; font-size: 0.95rem; font-weight: 600; margin-bottom: var(--space-sm); }
.footer-links a { display: block; color: rgba(255,255,255,0.5); font-size: 0.88rem; padding: 4px 0; transition: var(--transition); }
.footer-links a:hover { color: #fff; padding-left: 4px; }
.footer-contact p { font-size: 0.88rem; color: rgba(255,255,255,0.5); margin-bottom: 6px; display: flex; align-items: center; gap: 8px; }
.footer-contact i { width: 18px; color: var(--primary); }
.footer-social a { display: inline-flex; align-items: center; justify-content: center; width: 40px; height: 40px; border-radius: 50%; background: rgba(255,255,255,0.08); color: rgba(255,255,255,0.6); font-size: 1.1rem; transition: var(--transition); margin-right: 8px; }
.footer-social a:hover { background: var(--primary); color: #fff; transform: translateY(-3px); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding: var(--space-sm) 0; display: flex; justify-content: space-between; flex-wrap: wrap; gap: var(--space-xs); font-size: 0.82rem; color: rgba(255,255,255,0.35); }
.footer-bottom a { color: rgba(255,255,255,0.35); }
.footer-bottom a:hover { color: #fff; }
@media (max-width: 960px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 600px) {
  .footer-grid { grid-template-columns: 1fr; gap: var(--space-md); }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* Responsive Article */
@media (max-width: 768px) {
  .article-banner h1 { font-size: 1.6rem; }
  .article-banner .desc { font-size: 1rem; }
  .article-body { font-size: 1rem; }
  .article-body h2 { font-size: 1.35rem; }
  .article-nav { flex-direction: column; }
  .article-nav a { width: 100%; }
}
@media (max-width: 520px) {
  .article-banner { padding-top: calc(var(--header-h) + var(--space-md)); padding-bottom: var(--space-md); }
  .article-banner h1 { font-size: 1.35rem; }
  .article-main { padding: var(--space-lg) 0; }
  .article-meta { font-size: 0.82rem; gap: var(--space-xs); }
}

/* Utility */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }

/* roulang page: category2 */
/* ===== 设计变量 ===== */
    :root {
      --color-primary: #1E40AF;
      --color-primary-light: #3B82F6;
      --color-primary-lighter: #EFF6FF;
      --color-secondary: #7C3AED;
      --color-secondary-light: #A78BFA;
      --color-accent: #F59E0B;
      --color-accent-light: #FCD34D;
      --color-bg: #F8FAFC;
      --color-bg-white: #FFFFFF;
      --color-bg-warm: #FFFBEB;
      --color-text-dark: #1E293B;
      --color-text-medium: #475569;
      --color-text-light: #94A3B8;
      --color-border: #E2E8F0;
      --color-border-light: #F1F5F9;
      --color-success: #10B981;
      --color-success-light: #D1FAE5;
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --radius-xl: 24px;
      --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
      --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.07);
      --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.09);
      --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.06);
      --shadow-card-hover: 0 12px 36px rgba(0, 0, 0, 0.11);
      --space-xs: 6px;
      --space-sm: 12px;
      --space-md: 24px;
      --space-lg: 40px;
      --space-xl: 60px;
      --space-2xl: 80px;
      --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
      --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }

    /* ===== 基础 Reset ===== */
    *,
    *::before,
    *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
      -webkit-text-size-adjust: 100%;
    }
    body {
      font-family: var(--font-family);
      font-size: 16px;
      line-height: 1.7;
      color: var(--color-text-medium);
      background-color: var(--color-bg);
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      color: var(--color-primary);
      text-decoration: none;
      transition: color var(--transition);
    }
    a:hover {
      color: var(--color-primary-light);
    }
    a:focus-visible {
      outline: 2px solid var(--color-primary-light);
      outline-offset: 2px;
      border-radius: 4px;
    }
    button,
    input,
    textarea {
      font-family: inherit;
      font-size: inherit;
      border: none;
      outline: none;
    }
    button {
      cursor: pointer;
      background: none;
    }
    ul,
    ol {
      list-style: none;
    }
    h1,
    h2,
    h3,
    h4,
    h5,
    h6 {
      color: var(--color-text-dark);
      font-weight: 700;
      line-height: 1.3;
    }
    h1 {
      font-size: 2.6rem;
    }
    h2 {
      font-size: 2rem;
    }
    h3 {
      font-size: 1.4rem;
    }
    h4 {
      font-size: 1.1rem;
    }
    p {
      margin-bottom: var(--space-sm);
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 var(--space-md);
    }

    /* ===== Header / 导航 ===== */
    .header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--color-border-light);
      box-shadow: var(--shadow-sm);
    }
    .header .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding-top: var(--space-sm);
      padding-bottom: var(--space-sm);
      gap: var(--space-sm);
    }
    .logo {
      font-size: 1.5rem;
      font-weight: 800;
      color: var(--color-primary);
      letter-spacing: -0.5px;
      white-space: nowrap;
      display: flex;
      align-items: center;
      gap: 2px;
    }
    .logo span {
      color: var(--color-accent);
    }
    .logo:hover {
      color: var(--color-primary);
      opacity: 0.85;
    }

    .nav-search {
      flex: 1;
      max-width: 420px;
      position: relative;
      display: none;
    }
    .nav-search .search-icon {
      position: absolute;
      left: 14px;
      top: 50%;
      transform: translateY(-50%);
      color: var(--color-text-light);
      font-size: 0.95rem;
      pointer-events: none;
    }
    .nav-search input {
      width: 100%;
      padding: 10px 16px 10px 42px;
      border-radius: 50px;
      background: var(--color-bg);
      border: 1px solid var(--color-border);
      color: var(--color-text-dark);
      font-size: 0.9rem;
      transition: border var(--transition), box-shadow var(--transition);
    }
    .nav-search input::placeholder {
      color: var(--color-text-light);
    }
    .nav-search input:focus {
      border-color: var(--color-primary-light);
      box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 4px;
    }
    .nav-links a {
      padding: 8px 18px;
      border-radius: 50px;
      font-size: 0.9rem;
      font-weight: 500;
      color: var(--color-text-medium);
      transition: background var(--transition), color var(--transition);
      white-space: nowrap;
    }
    .nav-links a:hover {
      background: var(--color-primary-lighter);
      color: var(--color-primary);
    }
    .nav-links a.active {
      background: var(--color-primary);
      color: #fff;
      font-weight: 600;
    }
    .nav-links a.active:hover {
      background: var(--color-primary-light);
      color: #fff;
    }

    .nav-toggle {
      display: none;
      font-size: 1.4rem;
      color: var(--color-text-dark);
      padding: 6px 10px;
      border-radius: var(--radius-sm);
      transition: background var(--transition);
    }
    .nav-toggle:hover {
      background: var(--color-bg);
    }

    /* ===== Hero ===== */
    .hero-category {
      position: relative;
      min-height: 380px;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
      background: linear-gradient(135deg, rgba(30, 64, 175, 0.88) 0%, rgba(124, 58, 237, 0.82) 100%), url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
      padding: var(--space-xl) var(--space-md);
      overflow: hidden;
    }
    .hero-category::after {
      content: '';
      position: absolute;
      inset: 0;
      background: radial-gradient(ellipse at 20% 80%, rgba(245, 158, 11, 0.20) 0%, transparent 60%);
      pointer-events: none;
    }
    .hero-category .hero-content {
      position: relative;
      z-index: 2;
      max-width: 720px;
    }
    .hero-category .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: rgba(255, 255, 255, 0.18);
      backdrop-filter: blur(6px);
      color: #fff;
      padding: 6px 18px;
      border-radius: 50px;
      font-size: 0.85rem;
      font-weight: 500;
      margin-bottom: var(--space-md);
      border: 1px solid rgba(255, 255, 255, 0.15);
    }
    .hero-category .hero-badge i {
      font-size: 0.8rem;
    }
    .hero-category h1 {
      color: #fff;
      font-size: 2.8rem;
      font-weight: 800;
      margin-bottom: var(--space-sm);
      text-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
      letter-spacing: -0.5px;
    }
    .hero-category p {
      color: rgba(255, 255, 255, 0.90);
      font-size: 1.15rem;
      line-height: 1.7;
      max-width: 580px;
      margin: 0 auto var(--space-md);
    }
    .hero-category .hero-meta {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: var(--space-sm) var(--space-md);
      color: rgba(255, 255, 255, 0.75);
      font-size: 0.9rem;
    }
    .hero-category .hero-meta span {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    /* ===== 板块通用 ===== */
    .section {
      padding: var(--space-2xl) 0;
    }
    .section-header {
      text-align: center;
      max-width: 640px;
      margin: 0 auto var(--space-xl);
    }
    .section-header h2 {
      margin-bottom: var(--space-sm);
    }
    .section-header p {
      color: var(--color-text-light);
      font-size: 1.05rem;
    }
    .section-header .section-tag {
      display: inline-block;
      background: var(--color-primary-lighter);
      color: var(--color-primary);
      padding: 4px 16px;
      border-radius: 50px;
      font-size: 0.8rem;
      font-weight: 600;
      margin-bottom: var(--space-sm);
      letter-spacing: 0.5px;
    }

    /* ===== 标签列表 ===== */
    .tag-list {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: var(--space-sm);
      margin-top: var(--space-md);
    }
    .tag-item {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 8px 22px;
      border-radius: 50px;
      background: var(--color-bg-white);
      border: 1px solid var(--color-border);
      color: var(--color-text-medium);
      font-size: 0.9rem;
      font-weight: 500;
      transition: all var(--transition);
      box-shadow: var(--shadow-sm);
      cursor: default;
    }
    .tag-item i {
      color: var(--color-primary-light);
      font-size: 0.85rem;
    }
    .tag-item:hover {
      border-color: var(--color-primary-light);
      color: var(--color-primary);
      box-shadow: var(--shadow-md);
      transform: translateY(-2px);
    }

    /* ===== 卡片网格 ===== */
    .card-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: var(--space-md);
    }
    .card {
      background: var(--color-bg-white);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      transition: transform var(--transition), box-shadow var(--transition);
      display: flex;
      flex-direction: column;
    }
    .card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-card-hover);
    }
    .card .card-img {
      width: 100%;
      aspect-ratio: 16 / 10;
      object-fit: cover;
      display: block;
      background: var(--color-border-light);
    }
    .card .card-body {
      padding: var(--space-md);
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .card .card-body .card-tag {
      display: inline-block;
      background: var(--color-primary-lighter);
      color: var(--color-primary);
      padding: 2px 12px;
      border-radius: 50px;
      font-size: 0.75rem;
      font-weight: 600;
      margin-bottom: var(--space-xs);
      align-self: flex-start;
    }
    .card .card-body h3 {
      font-size: 1.1rem;
      margin-bottom: var(--space-xs);
      line-height: 1.4;
    }
    .card .card-body h3 a {
      color: var(--color-text-dark);
    }
    .card .card-body h3 a:hover {
      color: var(--color-primary);
    }
    .card .card-body p {
      color: var(--color-text-light);
      font-size: 0.9rem;
      margin-bottom: var(--space-sm);
      flex: 1;
    }
    .card .card-body .card-meta {
      display: flex;
      align-items: center;
      gap: var(--space-sm);
      font-size: 0.8rem;
      color: var(--color-text-light);
      border-top: 1px solid var(--color-border-light);
      padding-top: var(--space-sm);
      margin-top: auto;
    }
    .card .card-body .card-meta i {
      margin-right: 3px;
    }

    /* ===== 数据看板 ===== */
    .stats-section {
      background: var(--color-bg-white);
    }
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: var(--space-md);
      text-align: center;
    }
    .stat-item {
      padding: var(--space-lg) var(--space-sm);
      border-radius: var(--radius-md);
      background: var(--color-bg);
      transition: transform var(--transition), box-shadow var(--transition);
    }
    .stat-item:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .stat-item .stat-icon {
      font-size: 2rem;
      color: var(--color-primary-light);
      margin-bottom: var(--space-sm);
    }
    .stat-item .stat-number {
      font-size: 2.4rem;
      font-weight: 800;
      color: var(--color-primary);
      line-height: 1.2;
    }
    .stat-item .stat-label {
      color: var(--color-text-light);
      font-size: 0.9rem;
      margin-top: var(--space-xs);
    }

    /* ===== FAQ ===== */
    .faq-list {
      max-width: 780px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: var(--space-sm);
    }
    .faq-item {
      background: var(--color-bg-white);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--color-border-light);
      overflow: hidden;
      transition: box-shadow var(--transition);
    }
    .faq-item:hover {
      box-shadow: var(--shadow-md);
    }
    .faq-item .faq-question {
      padding: var(--space-md) var(--space-md);
      font-weight: 600;
      color: var(--color-text-dark);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: var(--space-sm);
      font-size: 1rem;
      background: none;
      width: 100%;
      text-align: left;
      border: none;
      transition: background var(--transition);
    }
    .faq-item .faq-question:hover {
      background: var(--color-bg);
    }
    .faq-item .faq-question i {
      color: var(--color-text-light);
      transition: transform var(--transition);
      font-size: 0.85rem;
      flex-shrink: 0;
    }
    .faq-item .faq-question[aria-expanded="true"] i {
      transform: rotate(180deg);
    }
    .faq-item .faq-answer {
      padding: 0 var(--space-md) var(--space-md);
      color: var(--color-text-medium);
      font-size: 0.95rem;
      line-height: 1.7;
      display: none;
    }
    .faq-item .faq-answer.open {
      display: block;
    }

    /* ===== CTA ===== */
    .cta-section {
      background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
      padding: var(--space-2xl) 0;
      text-align: center;
      color: #fff;
    }
    .cta-section h2 {
      color: #fff;
      margin-bottom: var(--space-sm);
    }
    .cta-section p {
      color: rgba(255, 255, 255, 0.85);
      max-width: 540px;
      margin: 0 auto var(--space-md);
      font-size: 1.05rem;
    }
    .cta-section .cta-buttons {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: var(--space-sm);
    }

    .btn {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 12px 32px;
      border-radius: 50px;
      font-weight: 600;
      font-size: 0.95rem;
      transition: all var(--transition);
      border: none;
      cursor: pointer;
    }
    .btn-primary {
      background: #fff;
      color: var(--color-primary);
    }
    .btn-primary:hover {
      background: var(--color-accent-light);
      color: var(--color-primary);
      transform: translateY(-2px);
      box-shadow: 0 8px 28px rgba(0, 0, 0, 0.18);
    }
    .btn-outline-light {
      background: transparent;
      color: #fff;
      border: 2px solid rgba(255, 255, 255, 0.45);
    }
    .btn-outline-light:hover {
      background: rgba(255, 255, 255, 0.12);
      border-color: rgba(255, 255, 255, 0.80);
      transform: translateY(-2px);
    }

    /* ===== Footer ===== */
    .footer {
      background: #0F172A;
      color: rgba(255, 255, 255, 0.70);
      padding: var(--space-xl) 0 var(--space-md);
    }
    .footer .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.4fr;
      gap: var(--space-lg);
      margin-bottom: var(--space-lg);
    }
    .footer .footer-brand .logo {
      color: #fff;
      margin-bottom: var(--space-sm);
      font-size: 1.4rem;
    }
    .footer .footer-brand .logo span {
      color: var(--color-accent);
    }
    .footer .footer-brand p {
      font-size: 0.88rem;
      line-height: 1.7;
      color: rgba(255, 255, 255, 0.55);
      max-width: 320px;
    }
    .footer .footer-links h4 {
      color: #fff;
      font-size: 0.95rem;
      margin-bottom: var(--space-sm);
      font-weight: 600;
    }
    .footer .footer-links a {
      display: block;
      color: rgba(255, 255, 255, 0.55);
      font-size: 0.88rem;
      padding: 4px 0;
      transition: color var(--transition);
    }
    .footer .footer-links a:hover {
      color: var(--color-accent);
    }
    .footer .footer-contact p {
      font-size: 0.88rem;
      color: rgba(255, 255, 255, 0.55);
      margin-bottom: 6px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .footer .footer-contact p i {
      width: 18px;
      color: var(--color-accent);
    }
    .footer .footer-social a {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 38px;
      height: 38px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.08);
      color: rgba(255, 255, 255, 0.60);
      font-size: 1rem;
      transition: all var(--transition);
      margin-right: 6px;
    }
    .footer .footer-social a:hover {
      background: var(--color-accent);
      color: #0F172A;
      transform: translateY(-2px);
    }
    .footer .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: var(--space-md);
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      gap: var(--space-sm);
      font-size: 0.82rem;
      color: rgba(255, 255, 255, 0.40);
    }

    /* ===== 响应式断点 ===== */
    @media (max-width: 1024px) {
      .card-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-md);
      }
      .hero-category h1 {
        font-size: 2.2rem;
      }
    }

    @media (max-width: 768px) {
      .nav-search {
        display: none;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        flex-direction: column;
        padding: var(--space-sm) var(--space-md);
        border-bottom: 1px solid var(--color-border);
        box-shadow: var(--shadow-md);
        gap: 2px;
      }
      .nav-links.open {
        display: flex;
      }
      .nav-links a {
        padding: 12px 16px;
        border-radius: var(--radius-sm);
        width: 100%;
      }
      .nav-links a.active {
        background: var(--color-primary);
        color: #fff;
      }
      .nav-toggle {
        display: block;
      }
      .hero-category {
        min-height: 300px;
        padding: var(--space-lg) var(--space-md);
      }
      .hero-category h1 {
        font-size: 1.8rem;
      }
      .hero-category p {
        font-size: 1rem;
      }
      .card-grid {
        grid-template-columns: 1fr;
        max-width: 480px;
        margin: 0 auto;
      }
      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-sm);
      }
      .stat-item .stat-number {
        font-size: 1.8rem;
      }
      .section {
        padding: var(--space-xl) 0;
      }
      .footer .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
      }
      .footer .footer-brand p {
        max-width: 100%;
      }
      .footer .footer-contact p {
        justify-content: center;
      }
      .footer .footer-bottom {
        flex-direction: column;
        text-align: center;
      }
      .tag-list {
        gap: 6px;
      }
      .tag-item {
        padding: 6px 14px;
        font-size: 0.82rem;
      }
      .section-header h2 {
        font-size: 1.6rem;
      }
    }

    @media (max-width: 520px) {
      .container {
        padding: 0 var(--space-sm);
      }
      .hero-category h1 {
        font-size: 1.5rem;
      }
      .hero-category p {
        font-size: 0.92rem;
      }
      .hero-category .hero-meta {
        flex-direction: column;
        align-items: center;
        gap: 4px;
        font-size: 0.82rem;
      }
      .stat-item {
        padding: var(--space-md) var(--space-sm);
      }
      .stat-item .stat-number {
        font-size: 1.5rem;
      }
      .stat-item .stat-label {
        font-size: 0.8rem;
      }
      .btn {
        padding: 10px 24px;
        font-size: 0.88rem;
      }
      .faq-item .faq-question {
        font-size: 0.92rem;
        padding: var(--space-sm) var(--space-sm);
      }
      .faq-item .faq-answer {
        font-size: 0.88rem;
        padding: 0 var(--space-sm) var(--space-sm);
      }
      .card .card-body {
        padding: var(--space-sm);
      }
      .card .card-body h3 {
        font-size: 1rem;
      }
    }