/* roulang page: index */
/* ========== 设计变量 ========== */
:root {
  --primary: #1b3a4b;
  --primary-light: #2a5c6e;
  --primary-dark: #122a36;
  --accent: #c9a96a;
  --accent-light: #dcc28a;
  --bg: #f7f5f2;
  --surface: #ffffff;
  --surface-alt: #efeae3;
  --text: #2b2a27;
  --text-muted: #6e6a63;
  --border: #e2ddd5;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 4px rgba(27, 58, 75, 0.06);
  --shadow: 0 4px 20px rgba(27, 58, 75, 0.08);
  --shadow-lg: 0 12px 40px rgba(27, 58, 75, 0.13);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --container: 1200px;
  --header-height: 76px;
}

/* ========== 基础 Reset ========== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  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 {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  font-size: inherit;
}
ul, ol {
  list-style: none;
}
input, textarea {
  font-family: inherit;
  font-size: inherit;
}

/* ========== 容器 ========== */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
.container-narrow {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ========== 通用区块标题 ========== */
.section-head {
  text-align: center;
  margin-bottom: 48px;
}
.section-head .eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
}
.section-head h2 {
  font-size: 34px;
  font-weight: 700;
  color: var(--primary-dark);
  letter-spacing: -0.5px;
  line-height: 1.3;
}
.section-head p {
  margin-top: 12px;
  font-size: 16px;
  color: var(--text-muted);
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

/* ========== 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.3px;
  transition: var(--transition);
  border: 2px solid transparent;
  line-height: 1.4;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover {
  background: var(--primary-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(27, 58, 75, 0.2);
}
.btn-outline {
  border-color: rgba(255, 255, 255, 0.6);
  color: #fff;
  background: transparent;
}
.btn-outline:hover {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.12);
  transform: translateY(-2px);
}
.btn-accent {
  background: var(--accent);
  color: var(--primary-dark);
}
.btn-accent:hover {
  background: var(--accent-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(201, 169, 106, 0.25);
}
.btn-sm {
  padding: 8px 20px;
  font-size: 14px;
}
.btn:focus-visible {
  outline: 3px solid rgba(201, 169, 106, 0.5);
  outline-offset: 2px;
}

/* ========== 徽章 / 标签 ========== */
.badge {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.5px;
  background: rgba(27, 58, 75, 0.08);
  color: var(--primary);
}
.badge-accent {
  background: rgba(201, 169, 106, 0.15);
  color: #8a6d35;
}
.badge-light {
  background: rgba(255, 255, 255, 0.18);
  color: #fff;
}

/* ========== Header ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: 24px;
}
.logo {
  font-size: 23px;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.5px;
  display: flex;
  align-items: center;
  gap: 8px;
  line-height: 1.2;
}
.logo-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  display: inline-block;
  flex-shrink: 0;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.main-nav a {
  padding: 9px 20px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  transition: var(--transition);
  position: relative;
}
.main-nav a:hover {
  color: var(--primary);
  background: rgba(27, 58, 75, 0.05);
}
.main-nav a.active {
  color: var(--primary);
  background: rgba(27, 58, 75, 0.08);
  font-weight: 600;
}
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 8px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  background: var(--surface-alt);
  transition: var(--transition);
}
.nav-toggle:hover {
  background: var(--border);
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: var(--transition);
}
.nav-toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}
.mobile-nav {
  display: none;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}
.mobile-nav.open {
  max-height: 400px;
}
.mobile-nav a {
  display: block;
  padding: 16px 24px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}
.mobile-nav a:last-child {
  border-bottom: none;
}
.mobile-nav a:hover {
  background: var(--surface-alt);
}
.mobile-nav a.active {
  color: var(--primary);
  font-weight: 600;
  background: rgba(27, 58, 75, 0.04);
}

/* ========== Hero ========== */
.hero {
  position: relative;
  padding: 120px 0 150px;
  background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(125deg, rgba(18, 42, 54, 0.94), rgba(42, 92, 110, 0.82));
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 80px;
  background: var(--bg);
  border-radius: 50% 50% 0 0 / 30% 30% 0 0;
}
.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: #fff;
  max-width: 780px;
  margin: 0 auto;
  padding: 0 24px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 999px;
  padding: 7px 20px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.5px;
  margin-bottom: 28px;
  backdrop-filter: blur(4px);
}
.hero-badge .pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(201, 169, 106, 0.6); }
  50% { box-shadow: 0 0 0 8px rgba(201, 169, 106, 0); }
}
.hero h1 {
  font-size: 50px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -1px;
  margin-bottom: 20px;
}
.hero h1 .highlight {
  color: var(--accent-light);
  position: relative;
}
.hero-subtitle {
  font-size: 17px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.85);
  max-width: 600px;
  margin: 0 auto 36px;
}
.hero-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.hero-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 30px;
  margin-top: 56px;
  flex-wrap: wrap;
}
.hero-meta-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.75);
}
.hero-meta-item i {
  font-style: normal;
  font-size: 16px;
}

/* ========== 核心优势 ========== */
.features-section {
  padding: 96px 0;
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--primary-light));
  opacity: 0;
  transition: var(--transition);
}
.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(27, 58, 75, 0.12);
}
.feature-card:hover::after {
  opacity: 1;
}
.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  background: rgba(27, 58, 75, 0.06);
  margin-bottom: 20px;
  transition: var(--transition);
}
.feature-card:hover .feature-icon {
  background: var(--primary);
  transform: scale(1.05);
}
.feature-icon span {
  line-height: 1;
}
.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 10px;
}
.feature-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ========== 分类入口 ========== */
.category-section {
  padding: 96px 0;
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.category-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}
.category-card {
  position: relative;
  border-radius: var(--radius-lg, 16px);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--surface-alt);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.category-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}
.category-card-img {
  position: relative;
  height: 220px;
  overflow: hidden;
}
.category-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.category-card:hover .category-card-img img {
  transform: scale(1.05);
}
.category-card-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(27, 58, 75, 0.45), transparent 60%);
}
.category-card-body {
  padding: 32px 28px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.category-card-body h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 10px;
}
.category-card-body p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  flex: 1;
  margin-bottom: 20px;
}
.category-card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary);
  font-weight: 600;
  font-size: 14px;
  transition: var(--transition);
}
.category-card-link:hover {
  gap: 12px;
  color: var(--primary-light);
}
.category-card-link .arrow {
  transition: var(--transition);
}

/* ========== 最新资讯 ========== */
.news-section {
  padding: 96px 0;
}
.news-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}
.news-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.news-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: rgba(27, 58, 75, 0.12);
}
.news-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}
.news-date {
  font-size: 13px;
  color: var(--text-muted);
}
.news-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--primary-dark);
  line-height: 1.5;
  margin-bottom: 10px;
}
.news-title a {
  transition: var(--transition);
}
.news-title a:hover {
  color: var(--primary-light);
}
.news-excerpt {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  flex: 1;
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-more {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  transition: var(--transition);
}
.news-more:hover {
  gap: 10px;
  color: var(--primary-light);
}
.empty-tip {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 20px;
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px dashed var(--border);
  color: var(--text-muted);
  font-size: 15px;
}

/* ========== 数据统计 ========== */
.stats-section {
  position: relative;
  padding: 90px 0;
  background: url('/assets/images/backpic/back-2.png') center/cover fixed no-repeat;
  overflow: hidden;
}
.stats-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(18, 42, 54, 0.95), rgba(27, 58, 75, 0.9));
}
.stats-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}
.stat-item {
  padding: 20px;
}
.stat-number {
  font-size: 48px;
  font-weight: 800;
  color: #fff;
  line-height: 1.1;
  margin-bottom: 8px;
  letter-spacing: -1px;
}
.stat-number .suffix {
  font-size: 28px;
  color: var(--accent-light);
}
.stat-label {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.8);
  letter-spacing: 1px;
}

/* ========== 服务流程 ========== */
.process-section {
  padding: 96px 0;
}
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  position: relative;
}
.process-grid::before {
  content: '';
  position: absolute;
  top: 36px;
  left: 12%;
  right: 12%;
  height: 2px;
  background: linear-gradient(90deg, var(--border), var(--accent), var(--border));
  border-radius: 2px;
}
.process-step {
  text-align: center;
  padding: 0 12px;
  position: relative;
}
.process-step-num {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--surface);
  border: 2px solid var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 800;
  color: var(--primary);
  margin: 0 auto 20px;
  position: relative;
  z-index: 2;
  box-shadow: 0 0 0 6px var(--bg);
  transition: var(--transition);
}
.process-step:hover .process-step-num {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  transform: scale(1.05);
}
.process-step h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 8px;
}
.process-step p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ========== FAQ ========== */
.faq-section {
  padding: 96px 0;
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 16px;
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover {
  border-color: rgba(27, 58, 75, 0.2);
  box-shadow: var(--shadow-sm);
}
.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--primary-dark);
  list-style: none;
  transition: var(--transition);
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary::after {
  content: '+';
  font-size: 24px;
  font-weight: 400;
  color: var(--accent);
  transition: var(--transition);
  flex-shrink: 0;
  margin-left: 16px;
}
.faq-item[open] summary::after {
  transform: rotate(45deg);
}
.faq-item[open] summary {
  color: var(--primary);
}
.faq-item .faq-answer {
  padding: 0 24px 22px;
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.75;
  border-top: 1px solid var(--border);
  padding-top: 16px;
  margin-top: 0;
}

/* ========== CTA ========== */
.cta-section {
  padding: 90px 0;
  background: linear-gradient(135deg, var(--primary-dark), var(--primary-light));
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(201, 169, 106, 0.2), transparent 60%);
  border-radius: 50%;
}
.cta-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
  padding: 0 24px;
}
.cta-inner h2 {
  font-size: 34px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}
.cta-inner p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 32px;
  line-height: 1.8;
}
.cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ========== 页脚 ========== */
.site-footer {
  background: var(--primary-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: 70px 0 30px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 50px;
}
.footer-brand .logo {
  color: #fff;
  margin-bottom: 14px;
  font-size: 24px;
}
.footer-brand .logo .logo-dot {
  background: var(--accent);
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.55);
  margin-bottom: 20px;
  max-width: 320px;
}
.footer-col h4 {
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 18px;
  letter-spacing: 1px;
  text-transform: uppercase;
}
.footer-col ul li {
  margin-bottom: 12px;
}
.footer-col ul a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  transition: var(--transition);
}
.footer-col ul a:hover {
  color: var(--accent-light);
  padding-left: 6px;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
}
.footer-domain {
  font-family: monospace;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .process-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 40px 24px;
  }
  .process-grid::before {
    display: none;
  }
  .hero h1 {
    font-size: 42px;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }
  .main-nav {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
  .mobile-nav {
    display: block;
  }
  .hero {
    padding: 80px 0 110px;
  }
  .hero h1 {
    font-size: 34px;
  }
  .hero-subtitle {
    font-size: 15px;
  }
  .features-section,
  .category-section,
  .news-section,
  .process-section,
  .faq-section {
    padding: 64px 0;
  }
  .category-grid {
    grid-template-columns: 1fr;
  }
  .news-grid {
    grid-template-columns: 1fr;
  }
  .stats-inner {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
  .stat-number {
    font-size: 36px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .section-head h2 {
    font-size: 28px;
  }
  .cta-inner h2 {
    font-size: 28px;
  }
}

@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }
  .hero h1 {
    font-size: 28px;
  }
  .hero-meta {
    gap: 16px;
    flex-direction: column;
    margin-top: 36px;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .process-grid {
    grid-template-columns: 1fr;
  }
  .stats-inner {
    grid-template-columns: 1fr 1fr;
  }
  .button-group .btn {
    width: 100%;
    justify-content: center;
  }
  .hero-buttons {
    flex-direction: column;
    width: 100%;
  }
  .hero-buttons .btn {
    width: 100%;
    justify-content: center;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

/* ========== 无障碍 ========== */
a:focus-visible,
button:focus-visible {
  outline: 3px solid rgba(201, 169, 106, 0.5);
  outline-offset: 2px;
}

/* roulang page: category1 */
:root {
  --primary: #16354f;
  --primary-2: #1d4370;
  --primary-3: #2a5a8c;
  --accent: #d4934a;
  --accent-2: #f0c98a;
  --bg: #f7f4ee;
  --bg-alt: #edf1f4;
  --white: #ffffff;
  --dark: #0e2332;
  --text: #1c2430;
  --text-weak: #667085;
  --border: #e5e2db;
  --border-2: #dfe4e8;
  --radius: 12px;
  --radius-lg: 18px;
  --radius-xl: 26px;
  --shadow-sm: 0 2px 10px rgba(22, 53, 79, 0.05);
  --shadow: 0 6px 24px rgba(22, 53, 79, 0.07);
  --shadow-hover: 0 16px 40px rgba(22, 53, 79, 0.12);
  --container: 1180px;
  --header-h: 78px;
  --transition: all 0.28s ease;
  --font-main: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-main);
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
}

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

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

ul,
ol {
  list-style: none;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 30px;
  border-radius: 50px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.3;
  border: 2px solid transparent;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary);
  color: var(--white);
  box-shadow: 0 6px 20px rgba(22, 53, 79, 0.25);
}

.btn-primary:hover {
  background: var(--primary-2);
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(22, 53, 79, 0.32);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.12);
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.35);
  backdrop-filter: blur(6px);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.6);
  transform: translateY(-2px);
}

.btn-light {
  background: var(--white);
  color: var(--primary);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
}

.btn-light:hover {
  background: var(--accent-2);
  transform: translateY(-2px);
}

.btn-outline-light {
  background: transparent;
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.5);
}

.btn-outline-light:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--white);
}

.btn:focus-visible {
  outline: 3px solid rgba(212, 147, 74, 0.5);
  outline-offset: 3px;
}

/* ===== Header / Nav ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow 0.3s ease;
}

.site-header.scrolled {
  box-shadow: 0 4px 24px rgba(22, 53, 79, 0.08);
}

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

.logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 22px;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: 0.5px;
  transition: opacity 0.2s;
}

.logo:hover {
  opacity: 0.82;
}

.logo-dot {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--primary-3));
  box-shadow: 0 4px 14px rgba(22, 53, 79, 0.28);
  position: relative;
  flex-shrink: 0;
}

.logo-dot::after {
  content: '';
  position: absolute;
  inset: 9px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: inset 0 1px 3px rgba(255, 255, 255, 0.3);
}

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

.main-nav a {
  padding: 10px 20px;
  border-radius: 40px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  transition: var(--transition);
}

.main-nav a:hover {
  background: var(--bg-alt);
  color: var(--primary);
}

.main-nav a.active {
  background: var(--primary);
  color: var(--white);
  box-shadow: 0 4px 14px rgba(22, 53, 79, 0.22);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 10px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: var(--transition);
}

.nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===== Page Hero ===== */
.page-hero {
  position: relative;
  padding: calc(var(--header-h) + 80px) 0 90px;
  background: linear-gradient(135deg, rgba(14, 35, 50, 0.94) 0%, rgba(26, 58, 92, 0.88) 55%, rgba(42, 90, 140, 0.82) 100%), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  color: var(--white);
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: -80px;
  right: -100px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(212, 147, 74, 0.28), transparent 70%);
  pointer-events: none;
}

.page-hero::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 56px;
  background: var(--bg);
  clip-path: ellipse(80% 100% at 50% 100%);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 28px;
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.85);
  transition: color 0.2s;
}

.breadcrumb a:hover {
  color: var(--accent-2);
}

.breadcrumb .dot {
  color: rgba(255, 255, 255, 0.4);
}

.breadcrumb .current {
  color: var(--white);
  font-weight: 600;
}

.hero-content {
  max-width: 720px;
  position: relative;
  z-index: 2;
}

.hero-tag {
  display: inline-block;
  padding: 6px 18px;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 40px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--accent-2);
  margin-bottom: 22px;
  background: rgba(255, 255, 255, 0.06);
}

.hero-content h1 {
  font-size: 48px;
  font-weight: 800;
  line-height: 1.22;
  margin-bottom: 18px;
  letter-spacing: 0.5px;
}

.hero-content p {
  font-size: 17px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 34px;
  max-width: 600px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

/* ===== Section ===== */
.section {
  padding: 88px 0;
}

.section-head {
  text-align: center;
  max-width: 650px;
  margin: 0 auto 52px;
}

.section-tag {
  display: inline-block;
  padding: 5px 16px;
  border-radius: 40px;
  background: rgba(212, 147, 74, 0.12);
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1px;
  margin-bottom: 16px;
  border: 1px solid rgba(212, 147, 74, 0.25);
}

.section-head h2 {
  font-size: 34px;
  font-weight: 800;
  color: var(--text);
  line-height: 1.3;
  margin-bottom: 14px;
}

.section-head p {
  font-size: 16px;
  color: var(--text-weak);
  line-height: 1.75;
}

/* ===== Stats ===== */
.stats-section {
  padding-top: 72px;
  padding-bottom: 72px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.stat-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  text-align: center;
  transition: var(--transition);
}

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

.stat-num {
  font-size: 42px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 14px;
  color: var(--text-weak);
  font-weight: 500;
}

/* ===== Process ===== */
.process-section {
  background: var(--white);
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  counter-reset: step;
}

.process-item {
  position: relative;
  padding: 40px 28px 30px;
  border-radius: var(--radius-lg);
  background: var(--bg);
  border: 1px solid var(--border);
  transition: var(--transition);
}

.process-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow);
  background: var(--white);
}

.process-num {
  font-size: 44px;
  font-weight: 800;
  color: rgba(212, 147, 74, 0.5);
  line-height: 1;
  margin-bottom: 18px;
}

.process-item h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
}

.process-item p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-weak);
}

/* ===== Features ===== */
.features-section {
  background: var(--bg);
}

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

.feature-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-hover);
}

.card-img-wrap {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4 / 2.6;
}

.card-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.feature-card:hover .card-img-wrap img {
  transform: scale(1.06);
}

.card-img-wrap::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(14, 35, 50, 0.35));
  pointer-events: none;
}

.card-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 2;
  padding: 5px 14px;
  border-radius: 30px;
  background: rgba(255, 255, 255, 0.9);
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
  backdrop-filter: blur(6px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.card-body {
  padding: 24px;
}

.card-body h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 10px;
  line-height: 1.4;
}

.card-body p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-weak);
}

/* ===== Tips ===== */
.tips-section {
  background: var(--white);
}

.tips-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.tips-img {
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow);
  position: relative;
}

.tips-img::after {
  content: '';
  position: absolute;
  inset: 0;
  border: 2px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-xl);
  pointer-events: none;
}

.tips-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.tips-img:hover img {
  transform: scale(1.02);
}

.tips-content {
  padding: 20px 0;
}

.tips-content .section-tag {
  margin-bottom: 14px;
}

.tips-content h2 {
  font-size: 30px;
  font-weight: 800;
  color: var(--text);
  line-height: 1.35;
  margin-bottom: 20px;
}

.tips-content > p {
  font-size: 15px;
  color: var(--text-weak);
  margin-bottom: 24px;
  line-height: 1.8;
}

.tips-list {
  margin-bottom: 30px;
}

.tips-list li {
  position: relative;
  padding: 10px 0 10px 42px;
  font-size: 15px;
  color: var(--text);
  line-height: 1.7;
  border-bottom: 1px dashed var(--border);
}

.tips-list li:last-child {
  border-bottom: none;
}

.tips-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  top: 10px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(212, 147, 74, 0.15);
  color: var(--accent);
  font-size: 14px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ===== FAQ ===== */
.faq-section {
  background: var(--bg);
}

.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.faq-item:hover {
  box-shadow: var(--shadow-sm);
}

.faq-item[open] {
  border-color: rgba(212, 147, 74, 0.35);
  box-shadow: var(--shadow);
}

.faq-item summary {
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: var(--transition);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: '+';
  font-size: 26px;
  font-weight: 300;
  color: var(--accent);
  flex-shrink: 0;
  transition: transform 0.25s ease;
  line-height: 1;
}

.faq-item[open] summary::after {
  content: '−';
  transform: rotate(180deg);
}

.faq-item p {
  padding: 0 24px 20px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-weak);
  border-top: 1px solid var(--bg-alt);
  margin-top: 0;
  padding-top: 16px;
}

/* ===== CTA ===== */
.cta-section {
  padding: 70px 0;
  background: var(--dark);
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  bottom: -120px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 300px;
  background: radial-gradient(ellipse, rgba(212, 147, 74, 0.18), transparent 70%);
  pointer-events: none;
}

.cta-box {
  text-align: center;
  max-width: 680px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

.cta-box h2 {
  font-size: 34px;
  font-weight: 800;
  color: var(--white);
  margin-bottom: 16px;
  line-height: 1.3;
}

.cta-box p {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 32px;
}

.cta-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
}

/* ===== Footer ===== */
.site-footer {
  background: #0a1823;
  color: rgba(255, 255, 255, 0.75);
  padding: 70px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 0.9fr 0.9fr;
  gap: 52px;
  padding-bottom: 48px;
}

.footer-brand .logo {
  color: var(--white);
  margin-bottom: 20px;
  font-size: 22px;
}

.footer-brand .logo .logo-dot {
  width: 34px;
  height: 34px;
  border-radius: 10px;
}

.footer-brand .logo .logo-dot::after {
  inset: 8px;
  border-radius: 7px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.6);
  max-width: 340px;
}

.footer-col h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 10px;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 28px;
  height: 3px;
  border-radius: 3px;
  background: var(--accent);
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.65);
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.footer-col a:hover {
  color: var(--accent-2);
  transform: translateX(4px);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
}

.footer-domain {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.3);
  font-family: 'SF Mono', 'Consolas', monospace;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .hero-content h1 {
    font-size: 40px;
  }

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

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

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
  }

  .tips-wrap {
    gap: 40px;
  }

  .footer-grid {
    gap: 36px;
  }
}

@media (max-width: 768px) {
  :root {
    --header-h: 68px;
  }

  .section {
    padding: 64px 0;
  }

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

  .nav-toggle {
    display: flex;
  }

  .main-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background: var(--white);
    padding: 20px 24px 28px;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.12);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    border-bottom: 1px solid var(--border);
    border-radius: 0 0 20px 20px;
    z-index: 99;
  }

  .main-nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .main-nav a {
    padding: 14px 18px;
    font-size: 16px;
    border-radius: 12px;
    text-align: center;
  }

  .hero-content h1 {
    font-size: 34px;
  }

  .hero-content p {
    font-size: 15px;
  }

  .page-hero {
    padding: calc(var(--header-h) + 50px) 0 66px;
  }

  .breadcrumb {
    margin-bottom: 18px;
  }

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

  .tips-img {
    order: -1;
  }

  .tips-content h2 {
    font-size: 26px;
  }

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

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

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

@media (max-width: 520px) {
  .container {
    padding: 0 18px;
  }

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

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

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

  .hero-content h1 {
    font-size: 28px;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .section-head h2 {
    font-size: 24px;
  }

  .section-tag {
    font-size: 12px;
    padding: 4px 12px;
  }

  .stat-card {
    padding: 24px 16px;
  }

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

  .process-item {
    padding: 28px 20px 22px;
  }

  .faq-item summary {
    padding: 16px 18px;
    font-size: 15px;
  }

  .faq-item p {
    padding: 0 18px 16px;
  }

  .cta-box h2 {
    font-size: 24px;
  }

  .cta-actions .btn {
    width: 100%;
  }

  .logo {
    font-size: 18px;
  }

  .logo-dot {
    width: 32px;
    height: 32px;
    border-radius: 10px;
  }

  .logo-dot::after {
    inset: 7px;
    border-radius: 6px;
  }
}

/* roulang page: article */
:root {
    --primary: #1b3a5b;
    --primary-light: #2e5378;
    --accent: #d9795f;
    --accent-soft: #f7ece6;
    --dark: #152430;
    --bg: #f8f7f4;
    --bg-soft: #eef2f5;
    --white: #ffffff;
    --text: #2a2f38;
    --text-weak: #6b7380;
    --border: #e5e2dc;
    --radius: 16px;
    --radius-sm: 10px;
    --shadow: 0 10px 30px rgba(27, 58, 91, 0.08);
    --shadow-hover: 0 18px 40px rgba(27, 58, 91, 0.14);
    --transition: 0.25s ease;
    --container: 1200px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    line-height: 1.75;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
}

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

ul,
ol {
    list-style: none;
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
    outline: 3px solid rgba(217, 121, 95, 0.5);
    outline-offset: 3px;
    border-radius: 6px;
}

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

/* ========== 导航 ========== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 78px;
    gap: 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 22px;
    letter-spacing: 0.6px;
    color: var(--primary);
    white-space: nowrap;
}

.logo-dot {
    width: 12px;
    height: 12px;
    border-radius: 3px;
    background: var(--accent);
    transform: rotate(45deg);
    flex-shrink: 0;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 6px;
}

.main-nav a {
    display: inline-block;
    padding: 9px 18px;
    border-radius: 999px;
    font-weight: 500;
    font-size: 15px;
    color: var(--text);
    transition: all var(--transition);
}

.main-nav a:hover {
    background: var(--bg-soft);
    color: var(--primary);
}

.main-nav a.active {
    background: var(--primary);
    color: #ffffff;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    align-items: center;
    border-radius: var(--radius-sm);
    transition: background var(--transition);
}

.nav-toggle:hover {
    background: var(--bg-soft);
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    border-radius: 2px;
    background: var(--primary);
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

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

.nav-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ========== 文章 Hero ========== */
.article-hero {
    position: relative;
    padding: 110px 0 100px;
    background-size: cover;
    background-position: center;
    background-color: var(--dark);
    color: #ffffff;
}

.article-hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(21, 36, 48, 0.94) 0%, rgba(27, 58, 91, 0.76) 55%, rgba(217, 121, 95, 0.28) 100%);
}

.article-hero-inner {
    position: relative;
    z-index: 2;
    max-width: 840px;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.78);
    margin-bottom: 24px;
    transition: color var(--transition), transform var(--transition);
}

.back-link:hover {
    color: #ffffff;
    transform: translateX(-4px);
}

.badge {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 999px;
    background: var(--accent);
    color: #ffffff;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.4px;
}

.article-hero h1 {
    font-size: 42px;
    line-height: 1.25;
    font-weight: 800;
    margin: 18px 0;
    word-break: break-word;
}

.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 18px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
}

.article-meta span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

/* ========== 面包屑 ========== */
.breadcrumb-bar {
    padding: 16px 0;
    background: var(--white);
    border-bottom: 1px solid var(--border);
    font-size: 14px;
    color: var(--text-weak);
}

.breadcrumb-bar .container {
    display: flex;
    align-items: center;
    gap: 8px;
    overflow: hidden;
}

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

.breadcrumb-bar a:hover {
    color: var(--accent);
    text-decoration: underline;
}

.breadcrumb-bar .current {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 320px;
    display: inline-block;
}

/* ========== 文章主体 ========== */
.article-section {
    padding: 72px 0;
}

.article-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 340px;
    gap: 40px;
    align-items: start;
}

.article-main .article-card {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 48px;
}

.article-content {
    font-size: 17px;
    line-height: 2;
    color: var(--text);
}

.article-content p {
    margin: 0 0 22px;
}

.article-content h2,
.article-content h3,
.article-content h4 {
    color: var(--primary);
    margin: 36px 0 16px;
    line-height: 1.4;
}

.article-content h2 {
    font-size: 24px;
    padding-left: 14px;
    border-left: 4px solid var(--accent);
}

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

.article-content h4 {
    font-size: 17px;
}

.article-content ul,
.article-content ol {
    margin: 0 0 22px;
    padding-left: 24px;
}

.article-content ul {
    list-style: disc;
}

.article-content ol {
    list-style: decimal;
}

.article-content li {
    margin-bottom: 8px;
}

.article-content blockquote {
    background: var(--bg-soft);
    border-left: 4px solid var(--accent);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    padding: 18px 24px;
    margin: 24px 0;
    color: var(--text-weak);
}

.article-content a {
    color: var(--primary);
    border-bottom: 1px solid rgba(27, 58, 91, 0.3);
    transition: border-color var(--transition), color var(--transition);
}

.article-content a:hover {
    color: var(--accent);
    border-color: var(--accent);
}

.article-content img {
    border-radius: var(--radius-sm);
    margin: 28px auto;
}

.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
    font-size: 15px;
}

.article-content th,
.article-content td {
    padding: 12px 16px;
    border: 1px solid var(--border);
    text-align: left;
}

.article-content th {
    background: var(--bg-soft);
    color: var(--primary);
    font-weight: 600;
}

.empty-content {
    text-align: center;
    color: var(--text-weak);
    padding: 40px 0;
    font-size: 16px;
}

/* ========== 文章标签 ========== */
.article-tags {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    margin-top: 40px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}

.tag-label {
    font-size: 14px;
    color: var(--text-weak);
    margin-right: 4px;
}

.tag {
    display: inline-block;
    padding: 6px 14px;
    border-radius: 999px;
    background: var(--bg-soft);
    color: var(--primary);
    font-size: 13px;
    transition: background var(--transition), color var(--transition);
}

.tag:hover {
    background: var(--primary);
    color: #ffffff;
}

/* ========== 未找到 ========== */
.not-found {
    text-align: center;
    padding: 64px 32px !important;
}

.not-found .nf-icon {
    font-size: 48px;
    margin-bottom: 18px;
}

.not-found h2 {
    font-size: 28px;
    color: var(--primary);
    margin-bottom: 12px;
}

.not-found p {
    color: var(--text-weak);
    margin-bottom: 28px;
}

/* ========== 按钮 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 13px 28px;
    border-radius: 999px;
    font-weight: 600;
    font-size: 15px;
    transition: all var(--transition);
    border: 1.5px solid transparent;
}

.btn-primary {
    background: var(--primary);
    color: #ffffff;
}

.btn-primary:hover {
    background: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.btn-ghost {
    background: transparent;
    color: #ffffff;
    border-color: rgba(255, 255, 255, 0.6);
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.14);
    border-color: #ffffff;
    transform: translateY(-2px);
}

/* ========== 侧栏 ========== */
.article-sidebar {
    display: flex;
    flex-direction: column;
    gap: 24px;
    position: sticky;
    top: 104px;
}

.side-card {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 26px;
    border: 1px solid transparent;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.side-card:hover {
    border-color: var(--border);
    box-shadow: var(--shadow-hover);
}

.side-card h3 {
    font-size: 17px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 14px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}

.side-card p {
    font-size: 14px;
    color: var(--text-weak);
}

.side-links li + li {
    border-top: 1px dashed var(--border);
}

.side-links a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 0;
    color: var(--text);
    font-size: 15px;
    font-weight: 500;
    transition: color var(--transition), padding-left var(--transition);
}

.side-links a::after {
    content: "→";
    color: var(--accent);
    opacity: 0;
    transform: translateX(-6px);
    transition: opacity var(--transition), transform var(--transition);
}

.side-links a:hover {
    color: var(--accent);
    padding-left: 6px;
}

.side-links a:hover::after {
    opacity: 1;
    transform: translateX(0);
}

.side-feature {
    background: linear-gradient(160deg, var(--primary), var(--dark));
    color: #ffffff;
}

.side-feature h3 {
    color: #ffffff;
    border-bottom-color: rgba(255, 255, 255, 0.18);
}

.side-feature p {
    color: rgba(255, 255, 255, 0.78);
}

/* ========== 分类入口 ========== */
.entry-section {
    padding: 72px 0;
    background: var(--white);
    border-top: 1px solid var(--border);
}

.section-header {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 44px;
}

.section-header h2 {
    font-size: 34px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1.3;
}

.section-header p {
    color: var(--text-weak);
    margin-top: 12px;
    font-size: 16px;
}

.entry-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.entry-card {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 28px;
    background: var(--bg);
    border: 1px solid transparent;
    border-radius: var(--radius);
    transition: all var(--transition);
}

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

.entry-thumb {
    width: 88px;
    height: 88px;
    border-radius: 14px;
    overflow: hidden;
    flex-shrink: 0;
}

.entry-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.entry-info {
    flex: 1;
    min-width: 0;
}

.entry-info h3 {
    font-size: 20px;
    color: var(--primary);
    margin-bottom: 6px;
}

.entry-info p {
    color: var(--text-weak);
    font-size: 14px;
    margin-bottom: 10px;
}

.entry-link {
    font-size: 14px;
    font-weight: 600;
    color: var(--accent);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: gap var(--transition);
}

.entry-link:hover {
    gap: 10px;
}

/* ========== CTA ========== */
.cta-section {
    position: relative;
    padding: 84px 0;
    background: linear-gradient(135deg, var(--dark), var(--primary));
    color: #ffffff;
    overflow: hidden;
}

.cta-section::before {
    content: "";
    position: absolute;
    inset: 0;
    background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
    opacity: 0.12;
}

.cta-inner {
    position: relative;
    z-index: 2;
    max-width: 720px;
    margin: 0 auto;
    text-align: center;
}

.cta-inner h2 {
    font-size: 34px;
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: 16px;
}

.cta-inner p {
    color: rgba(255, 255, 255, 0.82);
    margin-bottom: 28px;
    font-size: 16px;
}

.cta-btns {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

/* ========== FAQ ========== */
.faq-section {
    padding: 72px 0;
    background: var(--bg);
}

.faq-list {
    max-width: 860px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

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

.faq-item:hover {
    box-shadow: var(--shadow);
}

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

.faq-item summary::after {
    content: "+";
    font-size: 22px;
    color: var(--accent);
    line-height: 1;
    transition: transform 0.3s ease;
    flex-shrink: 0;
}

.faq-item[open] summary {
    color: var(--primary);
}

.faq-item[open] summary::after {
    transform: rotate(45deg);
}

.faq-item .faq-body {
    padding: 0 24px 20px;
    color: var(--text-weak);
    font-size: 15px;
}

/* ========== 页脚 ========== */
.site-footer {
    background: var(--dark);
    color: rgba(255, 255, 255, 0.72);
    padding-top: 64px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.6fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 40px;
}

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

.footer-brand p {
    font-size: 14px;
    line-height: 1.9;
    max-width: 360px;
}

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

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

.footer-col a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.68);
    transition: all var(--transition);
}

.footer-col a:hover {
    color: var(--accent);
    padding-left: 4px;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    padding: 22px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
}

.footer-domain {
    letter-spacing: 0.5px;
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
    .article-layout {
        grid-template-columns: 1fr;
    }

    .article-sidebar {
        position: static;
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
    }

    .article-hero {
        padding: 90px 0 78px;
    }
}

@media (max-width: 860px) {
    .nav-toggle {
        display: flex;
    }

    .main-nav {
        position: fixed;
        right: 0;
        top: 78px;
        width: 280px;
        height: calc(100vh - 78px);
        background: var(--white);
        box-shadow: -12px 0 32px rgba(21, 36, 48, 0.12);
        flex-direction: column;
        align-items: stretch;
        justify-content: flex-start;
        padding: 28px 20px;
        gap: 4px;
        transform: translateX(100%);
        transition: transform 0.3s ease;
        overflow-y: auto;
    }

    .main-nav.open {
        transform: translateX(0);
    }

    .main-nav a {
        display: block;
        padding: 14px 18px;
        border-radius: 10px;
        font-size: 16px;
    }

    .main-nav a + a {
        margin-top: 2px;
    }

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

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

@media (max-width: 768px) {
    .article-hero h1 {
        font-size: 32px;
    }

    .article-main .article-card {
        padding: 32px;
    }

    .article-sidebar {
        grid-template-columns: 1fr;
    }

    .article-content {
        font-size: 16px;
    }

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

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

    .cta-btns {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 520px) {
    .container {
        padding: 0 18px;
    }

    .header-inner {
        height: 70px;
    }

    .logo {
        font-size: 19px;
    }

    .main-nav {
        top: 70px;
        width: 100%;
        height: calc(100vh - 70px);
    }

    .article-hero {
        padding: 64px 0 56px;
    }

    .article-hero h1 {
        font-size: 26px;
    }

    .article-section {
        padding: 52px 0;
    }

    .article-main .article-card {
        padding: 24px 20px;
        border-radius: 14px;
    }

    .entry-card {
        flex-direction: column;
        align-items: flex-start;
        text-align: left;
        padding: 24px;
    }

    .entry-thumb {
        width: 100%;
        height: 160px;
    }

    .breadcrumb-bar .current {
        max-width: 160px;
    }

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

/* roulang page: category2 */
:root {
  --primary: #1e3a5f;
  --primary-dark: #152b46;
  --primary-light: #2d4d7a;
  --accent: #c9a15a;
  --accent-dark: #a8833e;
  --bg: #f5f7fa;
  --bg-alt: #edf0f5;
  --white: #ffffff;
  --text: #1e2a3a;
  --text-muted: #5f6f83;
  --border: #e0e5ee;
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 22px;
  --shadow-sm: 0 2px 10px rgba(30, 58, 95, 0.06);
  --shadow: 0 10px 32px rgba(30, 58, 95, 0.10);
  --shadow-lg: 0 18px 48px rgba(30, 58, 95, 0.14);
  --transition: 0.25s ease;
  --container: 1200px;
  --section-space: 96px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  font-size:16px;line-height:1.75;color:var(--text);background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none;transition:color var(--transition)}
img{max-width:100%;display:block}
ul,ol{list-style:none}
button,input{font-family:inherit;font-size:inherit;border:none;outline:none}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:var(--section-space) 0}
.section-alt{background:var(--bg-alt)}
.section-head{max-width:680px;margin:0 auto 52px;text-align:center}
.section-tag{
  display:inline-block;background:rgba(201,161,90,0.14);color:var(--accent-dark);
  font-size:13px;font-weight:600;padding:6px 16px;border-radius:40px;letter-spacing:0.6px;margin-bottom:16px;
}
.section-head h2{font-size:34px;line-height:1.35;color:var(--primary);font-weight:700;margin-bottom:14px}
.section-head p{font-size:16px;color:var(--text-muted);line-height:1.8}
.section-head.light h2{color:var(--white)}
.section-head.light p{color:rgba(255,255,255,0.75)}

/* Header / Nav */
.site-header{
  background:var(--white);border-bottom:1px solid var(--border);
  position:sticky;top:0;z-index:100;box-shadow:var(--shadow-sm);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:76px;gap:24px}
.logo{display:flex;align-items:center;gap:10px;font-size:22px;font-weight:800;color:var(--primary);letter-spacing:0.4px}
.logo-dot{width:10px;height:10px;border-radius:50%;background:var(--accent);display:inline-block;box-shadow:0 0 0 4px rgba(201,161,90,0.22)}
.main-nav{display:flex;align-items:center;gap:36px}
.main-nav a{
  font-size:15px;font-weight:500;color:var(--text-muted);padding:8px 2px;position:relative;
  transition:color var(--transition);
}
.main-nav a::after{
  content:"";position:absolute;left:0;bottom:0;width:100%;height:2px;border-radius:2px;
  background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform var(--transition);
}
.main-nav a:hover{color:var(--primary)}
.main-nav a:hover::after{transform:scaleX(1)}
.main-nav a.active{color:var(--primary);font-weight:600}
.main-nav a.active::after{transform:scaleX(1);background:var(--accent)}
.nav-toggle{display:none;flex-direction:column;justify-content:center;gap:5px;background:none;cursor:pointer;padding:8px}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--primary);border-radius:2px;transition:transform 0.3s,opacity 0.3s}

/* Buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:var(--primary);color:var(--white);font-size:15px;font-weight:600;
  padding:13px 30px;border-radius:60px;cursor:pointer;transition:all var(--transition);
  box-shadow:0 4px 14px rgba(30,58,95,0.2);border:2px solid transparent;
}
.btn:hover{background:var(--primary-light);transform:translateY(-2px);box-shadow:0 8px 24px rgba(30,58,95,0.26)}
.btn:active{transform:translateY(0);box-shadow:0 2px 8px rgba(30,58,95,0.18)}
.btn-light{background:var(--white);color:var(--primary);box-shadow:0 4px 18px rgba(0,0,0,0.12)}
.btn-light:hover{background:rgba(255,255,255,0.92);color:var(--primary-dark);box-shadow:0 8px 28px rgba(0,0,0,0.16)}

/* Page Hero */
.page-hero{
  position:relative;padding:120px 0 112px;color:var(--white);text-align:center;
  background:
    linear-gradient(rgba(21,43,70,0.78),rgba(21,43,70,0.88)),
    url('/assets/images/backpic/back-2.png') center/cover no-repeat;
}
.page-hero::before{
  content:"";position:absolute;right:-80px;top:-60px;width:360px;height:360px;border-radius:50%;
  background:radial-gradient(circle,rgba(201,161,90,0.22),transparent 70%);pointer-events:none;
}
.breadcrumb{display:flex;justify-content:center;align-items:center;gap:8px;font-size:14px;color:rgba(255,255,255,0.65);margin-bottom:28px}
.breadcrumb a{color:rgba(255,255,255,0.85)}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb-sep{color:rgba(255,255,255,0.35)}
.page-hero h1{font-size:46px;font-weight:800;line-height:1.3;margin-bottom:18px;letter-spacing:-0.5px}
.page-hero .hero-desc{max-width:620px;margin:0 auto 36px;font-size:17px;color:rgba(255,255,255,0.82);line-height:1.8}
.hero-search{
  display:flex;max-width:520px;margin:0 auto;background:var(--white);border-radius:60px;
  padding:6px 6px 6px 22px;align-items:center;gap:8px;box-shadow:0 12px 40px rgba(0,0,0,0.18);
}
.hero-search input{flex:1;font-size:15px;color:var(--text);background:transparent;padding:10px 0;min-width:0}
.hero-search input::placeholder{color:#93a1b5}
.hero-search button{
  background:var(--primary);color:var(--white);font-weight:600;font-size:14px;
  padding:11px 26px;border-radius:40px;cursor:pointer;transition:background var(--transition);
}
.hero-search button:hover{background:var(--primary-light)}

/* Category Cards */
.cards-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.cat-card{
  background:var(--white);border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--border);
  transition:all var(--transition);box-shadow:var(--shadow-sm);
}
.cat-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.cat-card img{width:100%;height:170px;object-fit:cover}
.cat-card-body{padding:26px 24px 28px}
.cat-card-body h3{font-size:19px;font-weight:700;color:var(--primary);margin-bottom:10px}
.cat-card-body p{font-size:14px;color:var(--text-muted);line-height:1.7;margin-bottom:18px}
.card-link{font-size:14px;font-weight:600;color:var(--accent-dark);display:inline-flex;align-items:center;gap:6px}
.card-link:hover{color:var(--primary)}

/* Popular Questions */
.question-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.question-card{
  background:var(--white);border-radius:var(--radius);padding:28px 26px;border:1px solid var(--border);
  transition:all var(--transition);position:relative;display:block;box-shadow:var(--shadow-sm);
}
.question-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:rgba(201,161,90,0.35)}
.question-card h3{font-size:17px;font-weight:700;color:var(--primary);margin-bottom:10px;line-height:1.5}
.question-card p{font-size:14px;color:var(--text-muted);line-height:1.7;margin-bottom:0}
.badge{
  display:inline-block;background:var(--accent);color:var(--white);font-size:11px;font-weight:700;
  padding:3px 12px;border-radius:30px;margin-bottom:14px;letter-spacing:0.5px;
}
.badge-num{
  position:absolute;top:22px;right:22px;font-size:26px;font-weight:800;color:var(--border);line-height:1;
}

/* FAQ */
.faq-list{max-width:820px;margin:0 auto}
.faq-item{
  background:var(--white);border:1px solid var(--border);border-radius:var(--radius);
  margin-bottom:16px;overflow:hidden;transition:all var(--transition);box-shadow:var(--shadow-sm);
}
.faq-item.active{border-color:rgba(201,161,90,0.45);box-shadow:var(--shadow)}
.faq-question{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:24px 28px;font-size:17px;font-weight:600;color:var(--primary);cursor:pointer;
  transition:background var(--transition);
}
.faq-question:hover{background:rgba(245,247,250,0.7)}
.faq-icon{
  flex-shrink:0;width:34px;height:34px;border-radius:50%;background:rgba(30,58,95,0.06);
  display:flex;align-items:center;justify-content:center;font-size:18px;color:var(--accent-dark);
  transition:all 0.3s;
}
.faq-item.active .faq-icon{background:var(--accent);color:var(--white);transform:rotate(45deg)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height 0.4s ease,padding 0.3s ease;padding:0 28px}
.faq-item.active .faq-answer{max-height:400px;padding:0 28px 26px;border-top:1px solid var(--border);padding-top:20px;margin-top:0}
.faq-answer p{font-size:15px;color:var(--text-muted);line-height:1.85}

/* Flow Steps */
.flow-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:28px}
.step{
  background:var(--white);border-radius:var(--radius-lg);padding:36px 30px;text-align:center;
  border:1px solid var(--border);transition:all var(--transition);position:relative;
}
.step:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.step-num{
  font-size:34px;font-weight:800;color:var(--accent);display:block;margin-bottom:18px;line-height:1;
  background:rgba(201,161,90,0.12);width:72px;height:72px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;margin-left:auto;margin-right:auto;margin-bottom:20px;
}
.step h3{font-size:18px;font-weight:700;color:var(--primary);margin-bottom:10px}
.step p{font-size:14px;color:var(--text-muted);line-height:1.7}

/* Stats */
.stats-section{
  background:
    linear-gradient(rgba(21,43,70,0.92),rgba(21,43,70,0.94)),
    url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  color:var(--white);
}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;margin-top:48px}
.stat-item{text-align:center;padding:30px 20px;border-radius:var(--radius);background:rgba(255,255,255,0.06);border:1px solid rgba(255,255,255,0.12)}
.stat-item strong{font-size:42px;font-weight:800;color:var(--accent);display:block;line-height:1.2;margin-bottom:8px}
.stat-item span{font-size:15px;color:rgba(255,255,255,0.72)}

/* CTA */
.cta-box{
  background:var(--white);border-radius:var(--radius-lg);padding:64px 48px;text-align:center;
  box-shadow:var(--shadow);border:1px solid var(--border);position:relative;overflow:hidden;
}
.cta-box::before{
  content:"";position:absolute;left:-40px;bottom:-40px;width:160px;height:160px;border-radius:50%;
  background:rgba(201,161,90,0.10);
}
.cta-box::after{
  content:"";position:absolute;right:-20px;top:-20px;width:120px;height:120px;border-radius:50%;
  background:rgba(30,58,95,0.05);
}
.cta-box h2{font-size:30px;font-weight:800;color:var(--primary);margin-bottom:16px}
.cta-box p{font-size:16px;color:var(--text-muted);max-width:440px;margin:0 auto 30px}

/* Related */
.related-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:28px}
.related-card{
  background:var(--white);border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--border);
  display:flex;flex-direction:column;transition:all var(--transition);box-shadow:var(--shadow-sm);
}
.related-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.related-card img{width:100%;height:220px;object-fit:cover}
.related-body{padding:28px 28px 30px}
.related-body h3{font-size:20px;font-weight:700;color:var(--primary);margin-bottom:10px}
.related-body p{font-size:14px;color:var(--text-muted);margin-bottom:16px}
.related-body a{font-size:14px;font-weight:600;color:var(--accent-dark)}
.related-body a:hover{color:var(--primary)}

/* Footer */
.site-footer{background:var(--primary-dark);color:rgba(255,255,255,0.72);padding:72px 0 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:48px;padding-bottom:48px}
.footer-brand .logo{color:var(--white);margin-bottom:18px;font-size:22px}
.footer-brand p{font-size:14px;line-height:1.8;color:rgba(255,255,255,0.58);max-width:360px}
.footer-col h4{font-size:16px;font-weight:700;color:var(--white);margin-bottom:20px}
.footer-col li{margin-bottom:12px}
.footer-col a{font-size:14px;color:rgba(255,255,255,0.62);transition:all var(--transition)}
.footer-col a:hover{color:var(--accent);padding-left:4px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,0.1);padding:22px 0;display:flex;align-items:center;
  justify-content:space-between;flex-wrap:wrap;gap:10px;
}
.footer-bottom p{font-size:13px;color:rgba(255,255,255,0.4)}
.footer-domain{font-size:13px;color:rgba(255,255,255,0.3);letter-spacing:0.5px}

/* Responsive */
@media(max-width:1024px){
  .cards-grid{grid-template-columns:repeat(2,1fr);gap:20px}
  .question-grid{grid-template-columns:repeat(2,1fr);gap:20px}
  .flow-steps{grid-template-columns:repeat(2,1fr);gap:24px}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:20px}
  .section{padding:72px 0}
  .section-head h2{font-size:30px}
}
@media(max-width:768px){
  .header-inner{height:66px}
  .nav-toggle{display:flex}
  .main-nav{
    position:fixed;top:66px;left:0;right:0;background:var(--white);flex-direction:column;
    align-items:flex-start;padding:20px 24px 28px;gap:20px;border-bottom:1px solid var(--border);
    box-shadow:0 20px 40px rgba(30,58,95,0.12);transform:translateY(-120%);transition:transform 0.35s ease;z-index:99;
  }
  .main-nav.open{transform:translateY(0)}
  .main-nav a{font-size:16px;width:100%}
  .page-hero{padding:80px 0 76px}
  .page-hero h1{font-size:34px}
  .footer-grid{grid-template-columns:1fr;gap:36px}
  .related-grid{grid-template-columns:1fr}
}
@media(max-width:520px){
  .container{padding:0 18px}
  .section{padding:60px 0}
  .cards-grid,.question-grid,.flow-steps,.stats-grid{grid-template-columns:1fr}
  .page-hero h1{font-size:28px}
  .hero-search{flex-direction:column;padding:16px;gap:10px;border-radius:20px}
  .hero-search input{width:100%;padding:8px 10px;border-bottom:1px solid var(--border)}
  .hero-search button{width:100%}
  .cta-box{padding:40px 24px}
  .cta-box h2{font-size:24px}
  .faq-question{font-size:15px;padding:20px}
  .faq-item.active .faq-answer{padding:0 20px 22px}
  .footer-grid{gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}