/* roulang page: index */
:root {
  --primary: #2563EB;
  --primary-dark: #1D4ED8;
  --primary-deep: #1E40AF;
  --secondary: #0E7490;
  --secondary-light: #E6F2F5;
  --bg: #F6F8FB;
  --card: #FFFFFF;
  --text: #0F172A;
  --text-weak: #64748B;
  --border: #E2E8F0;
  --success: #10B981;
  --radius: 14px;
  --shadow: 0 4px 20px rgba(2, 12, 27, 0.06);
  --shadow-hover: 0 12px 32px rgba(2, 12, 27, 0.12);
  --header-h: 72px;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 48px;
  --space-6: 64px;
  --space-7: 80px;
  --space-8: 96px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color 0.2s ease; }
button { font-family: inherit; cursor: pointer; }
input, textarea { font-family: inherit; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section { padding: var(--space-7) 0; }
.section + .section { border-top: 1px solid var(--border); }

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto var(--space-5);
}
.section-header h2 {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.3;
  margin-bottom: var(--space-2);
}
.section-header p {
  color: var(--text-weak);
  font-size: 16px;
}

/* ========== 按钮 ========== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 10px;
  padding: 14px 28px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s ease;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.25);
  text-align: center;
  justify-content: center;
  min-height: 48px;
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.3);
  color: #fff;
}
.btn-primary:active { transform: translateY(0); box-shadow: 0 2px 8px rgba(37, 99, 235, 0.2); }
.btn-primary:focus-visible { outline: 3px solid rgba(37, 99, 235, 0.4); outline-offset: 2px; }

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--primary);
  border: 1.5px solid var(--primary);
  border-radius: 10px;
  padding: 12px 26px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s ease;
  min-height: 48px;
  text-align: center;
  justify-content: center;
}
.btn-outline:hover {
  background: rgba(37, 99, 235, 0.06);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.12);
  color: var(--primary-dark);
}
.btn-outline:active { transform: translateY(0); }
.btn-outline:focus-visible { outline: 3px solid rgba(37, 99, 235, 0.3); outline-offset: 2px; }

.btn-white {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #fff;
  color: var(--primary);
  border: none;
  border-radius: 10px;
  padding: 14px 32px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.25s ease;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.1);
  min-height: 48px;
  justify-content: center;
}
.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  color: var(--primary-dark);
}
.btn-white:active { transform: translateY(0); }

/* ========== 标签/徽章 ========== */
.badge {
  display: inline-block;
  background: var(--secondary);
  color: #fff;
  font-size: 13px;
  font-weight: 500;
  border-radius: 999px;
  padding: 4px 14px;
  line-height: 1.4;
  white-space: nowrap;
}
.badge-soft {
  display: inline-block;
  background: var(--secondary-light);
  color: var(--secondary);
  font-size: 12px;
  font-weight: 600;
  border-radius: 999px;
  padding: 3px 12px;
  line-height: 1.4;
  white-space: nowrap;
}

/* ========== 顶部导航 ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s, box-shadow 0.3s;
}
.site-header.scrolled {
  border-bottom-color: var(--border);
  box-shadow: 0 4px 24px rgba(2, 12, 27, 0.06);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  gap: var(--space-3);
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 18px;
  font-weight: 800;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
}
.logo-text {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
  white-space: nowrap;
}
.main-nav { flex: 1; display: flex; justify-content: center; }
.main-nav ul {
  list-style: none;
  display: flex;
  gap: var(--space-4);
  align-items: center;
  margin: 0;
}
.main-nav a {
  display: block;
  padding: 10px 4px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-weak);
  position: relative;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}
.main-nav a:hover { color: var(--text); }
.main-nav li.active a {
  color: var(--primary);
  font-weight: 600;
  border-bottom-color: var(--primary);
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
}
.search-box {
  display: flex;
  align-items: center;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0 14px;
  height: 40px;
  width: 220px;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.search-box:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}
.search-box i {
  color: var(--text-weak);
  font-size: 14px;
  margin-right: 8px;
}
.search-box input {
  border: none;
  background: transparent;
  outline: none;
  font-size: 14px;
  width: 100%;
  color: var(--text);
}
.search-box input::placeholder { color: #94A3B8; }
.btn-text {
  background: none;
  border: none;
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
  padding: 8px 10px;
  cursor: pointer;
  transition: color 0.2s;
}
.btn-text:hover { color: var(--primary); }
.nav-cta {
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s ease;
  white-space: nowrap;
}
.nav-cta:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3); }
.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 22px;
  color: var(--text);
  padding: 8px;
  cursor: pointer;
}
.mobile-menu {
  display: none;
  background: #fff;
  border-top: 1px solid var(--border);
  padding: var(--space-3) var(--space-2);
}
.mobile-menu.open { display: block; }
.mobile-menu ul { list-style: none; }
.mobile-menu ul li { border-bottom: 1px solid var(--border); }
.mobile-menu ul li:last-child { border-bottom: none; }
.mobile-menu ul a {
  display: block;
  padding: 14px 8px;
  font-size: 16px;
  font-weight: 500;
  color: var(--text);
}
.mobile-menu ul li.active a { color: var(--primary); font-weight: 600; }
.mobile-menu .search-box { width: 100%; margin: var(--space-2) 0; }
.mobile-menu .mobile-actions { display: flex; gap: 12px; margin-top: var(--space-2); }

/* ========== Hero ========== */
.hero {
  position: relative;
  background: linear-gradient(130deg, #EFF5FF 0%, #F6F8FB 55%, #FFFFFF 100%);
  padding: var(--space-8) 0 var(--space-7);
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  top: -120px;
  right: -80px;
  width: 480px;
  height: 480px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.06) 0%, transparent 70%);
  pointer-events: none;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-6);
  align-items: center;
  position: relative;
  z-index: 1;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(14, 116, 144, 0.1);
  color: var(--secondary);
  font-size: 13px;
  font-weight: 600;
  border-radius: 999px;
  padding: 6px 16px;
  margin-bottom: var(--space-3);
}
.hero-badge i { font-size: 12px; }
.hero h1 {
  font-size: 44px;
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.25;
  margin-bottom: var(--space-3);
  color: var(--text);
}
.hero-sub {
  font-size: 17px;
  color: var(--text-weak);
  line-height: 1.75;
  max-width: 480px;
  margin-bottom: var(--space-4);
}
.hero-actions {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}
.hero-media {
  position: relative;
}
.hero-media img {
  width: 100%;
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(2, 12, 27, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.8);
}
.hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 20px;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.3);
  pointer-events: none;
}

/* ========== 信任条 ========== */
.trust-bar {
  background: #fff;
  border-bottom: 1px solid var(--border);
}
.trust-items {
  display: flex;
  justify-content: center;
  gap: var(--space-6);
  padding: var(--space-3) 0;
}
.trust-item {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 0 var(--space-3);
  position: relative;
}
.trust-item:not(:last-child)::after {
  content: "";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 28px;
  background: var(--border);
}
.trust-item strong {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
}
.trust-item span {
  font-size: 14px;
  color: var(--text-weak);
}

/* ========== 三步上手 ========== */
.steps {
  background: var(--bg);
}
.steps-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--space-5);
  position: relative;
  counter-reset: step;
}
.step-item {
  position: relative;
  padding: var(--space-3);
}
.step-item::before {
  content: "";
  position: absolute;
  top: 30px;
  right: -32px;
  width: 64px;
  height: 1px;
  border-top: 2px dashed var(--border);
}
.step-item:last-child::before { display: none; }
.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  font-size: 20px;
  font-weight: 700;
  margin-bottom: var(--space-3);
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.2);
}
.step-item h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: var(--space-1);
  color: var(--text);
}
.step-item p {
  font-size: 15px;
  color: var(--text-weak);
  line-height: 1.7;
  max-width: 280px;
}

/* ========== 案例证明 ========== */
.cases { background: #fff; }
.case-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
  align-items: center;
  margin-bottom: var(--space-6);
}
.case-row:last-child { margin-bottom: 0; }
.case-row.reversed .case-media { order: 2; }
.case-row.reversed .case-content { order: 1; }
.case-media {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  position: relative;
}
.case-media:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.case-media img { width: 100%; height: 320px; object-fit: cover; }
.case-media::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
}
.case-content {
  padding: var(--space-3);
}
.case-content blockquote {
  font-size: 20px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--text);
  border-left: 4px solid var(--primary);
  padding-left: var(--space-3);
  margin-bottom: var(--space-3);
}
.case-user {
  font-size: 14px;
  color: var(--text-weak);
  margin-bottom: var(--space-3);
  display: flex;
  align-items: center;
  gap: 8px;
}
.case-user i { color: var(--primary); }
.case-stats {
  display: flex;
  gap: var(--space-4);
  margin-top: var(--space-3);
}
.stat {
  background: var(--bg);
  border-radius: 12px;
  padding: var(--space-2) var(--space-3);
  text-align: center;
  min-width: 120px;
}
.stat strong {
  display: block;
  font-size: 26px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
}
.stat span {
  font-size: 13px;
  color: var(--text-weak);
}

/* ========== FAQ ========== */
.faq { background: var(--bg); }
.faq-list {
  max-width: 780px;
  margin: 0 auto;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.faq-item { border-bottom: 1px solid var(--border); }
.faq-item:last-child { border-bottom: none; }
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  background: #fff;
  border: none;
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  text-align: left;
  transition: background 0.2s;
}
.faq-question:hover { background: #F8FAFC; }
.faq-question i {
  color: var(--text-weak);
  transition: transform 0.3s ease;
  font-size: 14px;
  flex-shrink: 0;
}
.faq-item.active .faq-question i {
  transform: rotate(180deg);
  color: var(--primary);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease, background 0.3s;
  background: #fff;
  padding: 0 24px;
}
.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 20px 24px;
  background: #F8FAFC;
}
.faq-answer p {
  font-size: 15px;
  color: var(--text-weak);
  line-height: 1.75;
}

/* ========== 资讯动态 ========== */
.news { background: #fff; }
.news-layout {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--space-4);
  align-items: stretch;
}
.news-featured {
  background: var(--bg);
  border-radius: var(--radius);
  padding: var(--space-4);
  box-shadow: var(--shadow);
  transition: box-shadow 0.3s ease, transform 0.3s ease;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}
.news-featured::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
}
.news-featured:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}
.news-featured-meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}
.news-featured time {
  font-size: 13px;
  color: var(--text-weak);
}
.news-featured h3 {
  font-size: 22px;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: var(--space-2);
}
.news-featured h3 a { color: var(--text); }
.news-featured h3 a:hover { color: var(--primary); }
.news-featured p {
  font-size: 15px;
  color: var(--text-weak);
  line-height: 1.7;
  margin-bottom: var(--space-3);
  flex-grow: 1;
}
.read-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  transition: gap 0.2s;
}
.read-more:hover { gap: 12px; color: var(--primary-dark); }
.news-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.news-item {
  background: var(--bg);
  border-radius: 12px;
  padding: var(--space-3);
  transition: box-shadow 0.25s, transform 0.25s;
  border-left: 3px solid transparent;
}
.news-item:hover {
  box-shadow: var(--shadow);
  transform: translateY(-2px);
  border-left-color: var(--primary);
}
.news-item-meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-1);
}
.news-item-meta time {
  font-size: 12px;
  color: var(--text-weak);
}
.news-item h4 {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  margin-bottom: var(--space-1);
}
.news-item h4 a { color: var(--text); }
.news-item h4 a:hover { color: var(--primary); }
.news-item p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.empty-tip {
  text-align: center;
  padding: var(--space-5) 0;
  color: var(--text-weak);
  font-size: 16px;
  background: var(--bg);
  border-radius: var(--radius);
}

/* ========== CTA ========== */
.cta { background: var(--bg); }
.cta-banner {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-deep) 100%);
  border-radius: 20px;
  padding: var(--space-6) var(--space-5);
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--space-5);
  align-items: center;
  overflow: hidden;
  position: relative;
}
.cta-banner::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
}
.cta-banner::after {
  content: "";
  position: absolute;
  bottom: -40px;
  left: 30%;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
}
.cta-text { position: relative; z-index: 1; }
.cta-text h2 {
  font-size: 30px;
  font-weight: 700;
  color: #fff;
  margin-bottom: var(--space-2);
  letter-spacing: -0.01em;
}
.cta-text p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.7;
  max-width: 420px;
}
.cta-form {
  position: relative;
  z-index: 1;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 16px;
  padding: var(--space-4);
  backdrop-filter: blur(8px);
}
.cta-form input {
  width: 100%;
  height: 46px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
  padding: 0 16px;
  font-size: 14px;
  margin-bottom: var(--space-2);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.cta-form input::placeholder { color: rgba(255, 255, 255, 0.6); }
.cta-form input:focus {
  border-color: #fff;
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.2);
}
.cta-form .btn-white { width: 100%; }

/* ========== 页脚 ========== */
.site-footer {
  background: #0F172A;
  color: #94A3B8;
  padding: var(--space-6) 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: var(--space-5);
  padding-bottom: var(--space-5);
}
.footer-brand .logo {
  margin-bottom: var(--space-2);
}
.footer-brand .logo-text { color: #fff; }
.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  max-width: 300px;
}
.footer-col h4 {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  margin-bottom: var(--space-3);
}
.footer-col ul {
  list-style: none;
}
.footer-col ul li { margin-bottom: var(--space-1); }
.footer-col ul a {
  font-size: 14px;
  color: #94A3B8;
  transition: color 0.2s, padding-left 0.2s;
}
.footer-col ul a:hover {
  color: #fff;
  padding-left: 4px;
}
.footer-contact li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
}
.footer-contact li i {
  width: 16px;
  color: var(--secondary);
  flex-shrink: 0;
}
.footer-bottom {
  border-top: 1px solid rgba(148, 163, 184, 0.15);
  padding: var(--space-3) 0;
  text-align: center;
  font-size: 13px;
  color: #64748B;
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .container { padding: 0 20px; }
  .hero h1 { font-size: 36px; }
  .search-box { width: 160px; }
  .main-nav { gap: var(--space-2); }
}

@media (max-width: 768px) {
  .section { padding: var(--space-6) 0; }
  .main-nav, .search-box, .btn-text, .nav-cta { display: none; }
  .menu-toggle { display: block; }
  .header-inner { height: 60px; }
  
  .hero { padding: var(--space-6) 0; }
  .hero-grid { grid-template-columns: 1fr; gap: var(--space-4); }
  .hero h1 { font-size: 32px; }
  .hero-sub { font-size: 16px; }
  .hero-media { order: -1; }
  .hero-media img { max-height: 220px; object-fit: cover; }
  
  .trust-items { flex-direction: column; align-items: center; gap: var(--space-2); padding: var(--space-3) 0; }
  .trust-item { flex-direction: column; align-items: center; text-align: center; gap: 4px; }
  .trust-item::after { display: none; }
  .trust-item strong { font-size: 20px; }
  
  .steps-grid { grid-template-columns: 1fr; gap: var(--space-3); }
  .step-item::before { display: none; }
  .step-item { text-align: center; padding: var(--space-2); }
  .step-item p { max-width: 100%; }
  
  .case-row { grid-template-columns: 1fr; gap: var(--space-3); }
  .case-row.reversed .case-media { order: 0; }
  .case-row.reversed .case-content { order: 0; }
  .case-media img { height: 240px; }
  .case-content blockquote { font-size: 17px; }
  
  .news-layout { grid-template-columns: 1fr; }
  .news-featured h3 { font-size: 18px; }
  
  .cta-banner { grid-template-columns: 1fr; padding: var(--space-5) var(--space-3); }
  .cta-text h2 { font-size: 24px; }
  
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--space-4); }
}

@media (max-width: 576px) {
  .section { padding: var(--space-5) 0; }
  .section-header h2 { font-size: 24px; }
  .hero h1 { font-size: 28px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn-primary, .hero-actions .btn-outline { width: 100%; }
  .trust-items { gap: var(--space-3); padding: var(--space-2) 0; }
  .case-stats { flex-wrap: wrap; }
  .stat { min-width: 100px; padding: var(--space-2); }
  .footer-grid { grid-template-columns: 1fr; gap: var(--space-4); }
  .footer-bottom { font-size: 12px; }
  .faq-question { font-size: 14px; padding: 16px 18px; }
  .faq-answer { padding: 0 18px; }
  .faq-item.active .faq-answer { padding: 16px 18px; }
  .cta-form { padding: var(--space-3); }
}

/* roulang page: article */
:root {
            --primary: #2563EB;
            --primary-dark: #1D4ED8;
            --primary-deep: #1E40AF;
            --secondary: #0E7490;
            --bg: #F6F8FB;
            --card-bg: #FFFFFF;
            --text: #0F172A;
            --text-secondary: #64748B;
            --text-light: #94A3B8;
            --border: #E2E8F0;
            --success: #10B981;
            --radius: 14px;
            --radius-lg: 20px;
            --shadow-card: 0 4px 20px rgba(2, 12, 27, 0.06);
            --shadow-hover: 0 12px 32px rgba(2, 12, 27, 0.12);
            --space-xs: 8px;
            --space-sm: 16px;
            --space-md: 24px;
            --space-lg: 32px;
            --space-xl: 48px;
            --space-2xl: 64px;
            --space-3xl: 96px;
            --font-main: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Segoe UI", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-main);
            font-size: 15px;
            line-height: 1.75;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.2s ease;
        }

        a:hover {
            color: var(--primary-dark);
        }

        ul, ol {
            list-style: none;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.8);
            box-shadow: 0 1px 8px rgba(2, 12, 27, 0.04);
            transition: box-shadow 0.3s ease;
        }

        .site-header.scrolled {
            box-shadow: 0 4px 24px rgba(2, 12, 27, 0.08);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 24px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--primary-deep));
            color: #fff;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 800;
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
        }

        .logo-text {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.01em;
            white-space: nowrap;
        }

        .main-nav ul {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .main-nav a {
            display: inline-block;
            padding: 10px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 8px;
            position: relative;
            transition: color 0.2s ease, background 0.2s ease;
        }

        .main-nav a:hover {
            color: var(--primary);
            background: rgba(37, 99, 235, 0.06);
        }

        .main-nav li.active a {
            color: var(--primary);
            font-weight: 600;
        }

        .main-nav li.active a::after {
            content: '';
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: 4px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 10px;
            padding: 0 12px;
            height: 40px;
            width: 200px;
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
        }

        .search-box:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
        }

        .search-box i {
            color: var(--text-light);
            font-size: 14px;
            margin-right: 8px;
        }

        .search-box input {
            border: none;
            background: transparent;
            outline: none;
            font-size: 13px;
            color: var(--text);
            width: 100%;
            font-family: var(--font-main);
        }

        .search-box input::placeholder {
            color: var(--text-light);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            color: #fff;
            border: 1px solid var(--primary);
            padding: 10px 24px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.25s ease;
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(37, 99, 235, 0.25);
        }

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

        .btn-sm {
            padding: 8px 18px;
            font-size: 14px;
        }

        .btn-login {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 12px;
            border-radius: 8px;
            transition: all 0.2s ease;
        }

        .btn-login:hover {
            color: var(--primary);
            background: rgba(37, 99, 235, 0.06);
        }

        .hamburger {
            display: none;
            width: 44px;
            height: 44px;
            border: 1px solid var(--border);
            background: #fff;
            border-radius: 10px;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--text);
            transition: all 0.2s ease;
        }

        .hamburger:hover {
            background: var(--bg);
            border-color: var(--primary);
        }

        /* Mobile Menu */
        .mobile-menu {
            display: none;
            background: #fff;
            border-bottom: 1px solid var(--border);
            padding: 16px 24px 24px;
            box-shadow: 0 8px 24px rgba(2, 12, 27, 0.06);
        }

        .mobile-menu.open {
            display: block;
        }

        .mobile-menu nav ul {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .mobile-menu nav a {
            display: block;
            padding: 12px 16px;
            font-size: 15px;
            color: var(--text);
            border-radius: 10px;
        }

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

        .mobile-menu nav li.active a {
            background: rgba(37, 99, 235, 0.08);
            color: var(--primary);
            font-weight: 600;
        }

        .mobile-menu .mobile-search {
            display: flex;
            align-items: center;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 10px;
            padding: 0 14px;
            height: 44px;
            margin-top: 12px;
        }

        .mobile-menu .mobile-search i {
            color: var(--text-light);
            margin-right: 10px;
            font-size: 14px;
        }

        .mobile-menu .mobile-search input {
            border: none;
            background: transparent;
            outline: none;
            font-size: 14px;
            width: 100%;
            font-family: var(--font-main);
        }

        .mobile-menu .mobile-actions {
            display: flex;
            gap: 12px;
            margin-top: 16px;
        }

        .mobile-menu .btn-primary {
            flex: 1;
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-bar {
            background: #fff;
            border-bottom: 1px solid var(--border);
            padding: 14px 0;
            font-size: 13px;
            color: var(--text-secondary);
        }

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

        .breadcrumb-bar a {
            color: var(--text-secondary);
            transition: color 0.2s ease;
        }

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

        .breadcrumb-bar i {
            font-size: 11px;
            color: var(--text-light);
        }

        .breadcrumb-bar span {
            color: var(--text);
            font-weight: 500;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            max-width: 420px;
        }

        /* ===== Article Head ===== */
        .article-head {
            position: relative;
            background: linear-gradient(135deg, #EFF6FF 0%, #F6F8FB 60%, #F1F5F9 100%);
            padding: 64px 0 56px;
            border-bottom: 1px solid rgba(226, 232, 240, 0.6);
            overflow: hidden;
        }

        .article-head::before {
            content: '';
            position: absolute;
            top: -40px;
            right: -40px;
            width: 280px;
            height: 280px;
            background: radial-gradient(circle, rgba(37, 99, 235, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .article-head .container {
            position: relative;
            z-index: 1;
            max-width: 860px;
            text-align: center;
        }

        .article-head-content {
            text-align: center;
        }

        .article-category-tag {
            display: inline-flex;
            align-items: center;
            background: rgba(14, 116, 144, 0.1);
            color: var(--secondary);
            font-size: 13px;
            font-weight: 600;
            padding: 5px 16px;
            border-radius: 999px;
            margin-bottom: 20px;
            letter-spacing: 0.02em;
        }

        .article-title {
            font-size: 38px;
            font-weight: 800;
            line-height: 1.3;
            letter-spacing: -0.02em;
            color: var(--text);
            margin-bottom: 20px;
        }

        .article-meta-line {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 24px;
            color: var(--text-secondary);
            font-size: 13px;
            flex-wrap: wrap;
        }

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

        .article-meta-line i {
            font-size: 14px;
            color: var(--text-light);
        }

        /* ===== Article Body ===== */
        .article-body-wrap {
            padding: 64px 0 80px;
        }

        .article-content-box {
            max-width: 820px;
            margin: 0 auto;
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            padding: 48px 56px;
            border: 1px solid rgba(226, 232, 240, 0.6);
        }

        .cms-content {
            font-size: 16px;
            line-height: 1.9;
            color: var(--text);
        }

        .cms-content h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text);
            margin: 40px 0 16px;
            letter-spacing: -0.01em;
            padding-bottom: 8px;
            border-bottom: 1px solid var(--border);
        }

        .cms-content h2:first-child {
            margin-top: 0;
        }

        .cms-content h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text);
            margin: 28px 0 12px;
        }

        .cms-content h4 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text);
            margin: 24px 0 8px;
        }

        .cms-content p {
            margin: 0 0 16px;
        }

        .cms-content a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 2px;
        }

        .cms-content a:hover {
            color: var(--primary-dark);
        }

        .cms-content ul,
        .cms-content ol {
            margin: 0 0 20px;
            padding-left: 24px;
        }

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

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

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

        .cms-content blockquote {
            border-left: 4px solid var(--primary);
            background: #F0F7FF;
            padding: 18px 24px;
            border-radius: 0 12px 12px 0;
            margin: 24px 0;
            color: var(--text);
            font-style: normal;
        }

        .cms-content blockquote p {
            margin: 0;
        }

        .cms-content img {
            border-radius: 12px;
            box-shadow: var(--shadow-card);
            margin: 24px auto;
        }

        .cms-content code {
            background: #F1F5F9;
            padding: 2px 8px;
            border-radius: 6px;
            font-size: 14px;
            font-family: "SF Mono", Consolas, monospace;
        }

        .cms-content pre {
            background: #0F172A;
            color: #E2E8F0;
            padding: 24px;
            border-radius: 12px;
            overflow-x: auto;
            margin: 24px 0;
        }

        .cms-content pre code {
            background: transparent;
            color: inherit;
            padding: 0;
        }

        .cms-content hr {
            border: none;
            border-top: 1px solid var(--border);
            margin: 32px 0;
        }

        .cms-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            font-size: 14px;
        }

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

        .cms-content table th {
            background: var(--bg);
            font-weight: 600;
        }

        /* Not Found */
        .not-found-box {
            text-align: center;
            padding: 80px 40px;
        }

        .not-found-icon {
            width: 72px;
            height: 72px;
            background: rgba(37, 99, 235, 0.08);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 24px;
            font-size: 28px;
            color: var(--primary);
        }

        .not-found-box h2 {
            font-size: 26px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .not-found-box p {
            color: var(--text-secondary);
            margin-bottom: 24px;
        }

        /* ===== Related Posts ===== */
        .related-posts {
            padding: 64px 0 80px;
            background: #fff;
            border-top: 1px solid var(--border);
        }

        .related-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 32px;
        }

        .related-header h2 {
            font-size: 26px;
            font-weight: 700;
            letter-spacing: -0.01em;
        }

        .related-header .view-more {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 6px;
            transition: all 0.2s ease;
        }

        .related-header .view-more:hover {
            color: var(--primary);
            gap: 10px;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .related-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: transform 0.25s ease, box-shadow 0.25s ease;
            display: flex;
            flex-direction: column;
        }

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

        .related-card-img {
            height: 180px;
            overflow: hidden;
            position: relative;
        }

        .related-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .related-card:hover .related-card-img img {
            transform: scale(1.04);
        }

        .related-card-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 60%, rgba(2, 12, 27, 0.1) 100%);
            pointer-events: none;
        }

        .related-card-body {
            padding: 20px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .related-card-tag {
            display: inline-block;
            background: rgba(14, 116, 144, 0.1);
            color: var(--secondary);
            font-size: 12px;
            font-weight: 600;
            padding: 3px 12px;
            border-radius: 999px;
            align-self: flex-start;
            margin-bottom: 12px;
        }

        .related-card-body h3 {
            font-size: 16px;
            font-weight: 600;
            line-height: 1.5;
            margin-bottom: 8px;
        }

        .related-card-body h3 a {
            color: var(--text);
            transition: color 0.2s ease;
        }

        .related-card-body h3 a:hover {
            color: var(--primary);
        }

        .related-card-body p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            flex: 1;
        }

        .related-card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 12px;
            color: var(--text-light);
            margin-top: 12px;
        }

        /* ===== Back Section ===== */
        .back-section {
            background: var(--bg);
            padding: 40px 0 64px;
        }

        .back-section .container {
            display: flex;
            justify-content: center;
        }

        .back-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--text-secondary);
            font-size: 14px;
            font-weight: 500;
            padding: 10px 20px;
            border: 1px solid var(--border);
            border-radius: 10px;
            background: #fff;
            transition: all 0.2s ease;
        }

        .back-link:hover {
            color: var(--primary);
            border-color: var(--primary);
            transform: translateX(-4px);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0F172A;
            color: rgba(255, 255, 255, 0.8);
            padding-top: 64px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 48px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

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

        .footer-brand .logo-text {
            color: #fff;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 320px;
            margin-top: 16px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            transition: color 0.2s ease;
        }

        .footer-col a:hover {
            color: #fff;
        }

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
        }

        .footer-contact i {
            font-size: 14px;
            color: var(--primary);
            width: 18px;
            text-align: center;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 24px 0;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
            flex-wrap: wrap;
            gap: 8px;
        }

        /* ===== Responsive ===== */
        @media screen and (max-width: 1024px) {
            .header-actions .search-box {
                width: 150px;
            }

            .main-nav a {
                padding: 10px 12px;
                font-size: 14px;
            }
        }

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

            .header-inner {
                height: 64px;
            }

            .main-nav,
            .header-actions .search-box,
            .header-actions .btn-login,
            .header-actions .btn-primary {
                display: none;
            }

            .hamburger {
                display: flex;
            }

            .article-head {
                padding: 40px 0 36px;
            }

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

            .article-content-box {
                padding: 28px 20px;
            }

            .article-body-wrap {
                padding: 32px 0 48px;
            }

            .related-posts {
                padding: 40px 0 48px;
            }

            .related-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

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

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

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

        @media screen and (max-width: 520px) {
            .article-head::before {
                width: 160px;
                height: 160px;
            }

            .article-title {
                font-size: 24px;
            }

            .article-meta-line {
                gap: 12px;
                flex-direction: column;
                gap: 8px;
            }

            .related-header {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }

            .related-header h2 {
                font-size: 22px;
            }

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

            .related-card-img {
                height: 160px;
            }
        }

        @media screen and (min-width: 769px) {
            .mobile-menu {
                display: none !important;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #2563EB;
            --primary-dark: #1D4ED8;
            --primary-light: #EFF6FF;
            --secondary: #0E7490;
            --success: #10B981;
            --bg: #F6F8FB;
            --card-bg: #FFFFFF;
            --text: #0F172A;
            --text-light: #64748B;
            --border: #E2E8F0;
            --radius: 14px;
            --radius-sm: 10px;
            --shadow: 0 4px 20px rgba(2, 12, 27, 0.06);
            --shadow-hover: 0 12px 32px rgba(2, 12, 27, 0.12);
            --transition: 0.25s ease;
            --space-sm: 16px;
            --space-md: 24px;
            --space-lg: 48px;
            --space-xl: 80px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Segoe UI", sans-serif;
            color: var(--text);
            background: var(--bg);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            font-size: 15px;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition), box-shadow var(--transition);
        }

        a:hover {
            color: var(--primary-dark);
        }

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .section {
            padding: var(--space-xl) 0;
        }

        .section-header {
            margin-bottom: var(--space-lg);
        }

        .section-header h2 {
            font-size: 30px;
            font-weight: 700;
            margin: 0 0 8px;
            letter-spacing: -0.01em;
            line-height: 1.3;
        }

        .section-header p {
            color: var(--text-light);
            font-size: 15px;
            max-width: 640px;
            margin: 0;
        }

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 1px 8px rgba(2, 12, 27, 0.04);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            padding: 12px 0;
            min-height: 64px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 800;
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
        }

        .logo-text {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.01em;
            white-space: nowrap;
        }

        .main-nav ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            gap: 4px;
        }

        .main-nav a {
            display: inline-block;
            padding: 8px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-light);
            border-radius: 8px;
            border-bottom: 2px solid transparent;
            transition: all var(--transition);
        }

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

        .main-nav li.active a {
            color: var(--primary);
            background: var(--primary-light);
            border-bottom-color: var(--primary);
            font-weight: 600;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .search-box {
            position: relative;
            display: flex;
            align-items: center;
        }

        .search-box input {
            width: 160px;
            height: 38px;
            border: 1px solid var(--border);
            border-radius: 20px;
            padding: 0 36px 0 14px;
            font-size: 13px;
            background: #F8FAFC;
            color: var(--text);
            transition: all var(--transition);
        }

        .search-box input:focus {
            outline: none;
            border-color: var(--primary);
            background: #fff;
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
            width: 200px;
        }

        .search-box i {
            position: absolute;
            right: 14px;
            color: var(--text-light);
            font-size: 13px;
            pointer-events: none;
        }

        .header-login {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-light);
            padding: 6px 10px;
        }

        .header-login:hover {
            color: var(--primary);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            padding: 12px 28px;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            line-height: 1.4;
            min-height: 44px;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(37, 99, 235, 0.35);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
        }

        .btn-outline {
            background: transparent;
            border: 2px solid var(--primary);
            color: var(--primary);
        }

        .btn-outline:hover {
            background: var(--primary-light);
            color: var(--primary-dark);
            transform: translateY(-2px);
            border-color: var(--primary-dark);
        }

        .btn-sm {
            padding: 8px 20px;
            font-size: 14px;
            min-height: 38px;
        }

        .btn-white {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 4px 16px rgba(2, 12, 27, 0.15);
        }

        .btn-white:hover {
            background: #F8FAFC;
            color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(2, 12, 27, 0.2);
        }

        /* Hamburger */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            padding: 10px;
            cursor: pointer;
        }

        .hamburger span {
            width: 22px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: all 0.3s ease;
        }

        /* Hero Banner */
        .hero-banner {
            position: relative;
            padding: 96px 0 88px;
            background-color: #EFF6FF;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center center;
            overflow: hidden;
        }

        .hero-banner::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(255, 255, 255, 0.96) 0%, rgba(255, 255, 255, 0.88) 40%, rgba(255, 255, 255, 0.55) 100%);
        }

        .hero-banner .container {
            position: relative;
            z-index: 2;
        }

        .hero-content {
            max-width: 720px;
        }

        .hero-content .tagline {
            display: inline-block;
            background: rgba(37, 99, 235, 0.1);
            color: var(--secondary);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 999px;
            margin-bottom: 20px;
            letter-spacing: 0.02em;
        }

        .hero-content h1 {
            font-size: 44px;
            font-weight: 800;
            line-height: 1.25;
            margin: 0 0 18px;
            letter-spacing: -0.02em;
        }

        .hero-content h1 span {
            color: var(--primary);
        }

        .hero-content .subtitle {
            font-size: 17px;
            line-height: 1.8;
            color: var(--text-light);
            margin: 0 0 32px;
            max-width: 600px;
        }

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

        /* Split Section */
        .split-section {
            background: var(--card-bg);
            border-bottom: 1px solid var(--border);
        }

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

        .split-media {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
        }

        .split-media img {
            width: 100%;
            height: 380px;
            object-fit: cover;
            display: block;
        }

        .split-media::after {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(180deg, transparent 60%, rgba(2, 12, 27, 0.15));
            pointer-events: none;
        }

        .split-text h2 {
            font-size: 28px;
            font-weight: 700;
            margin: 0 0 16px;
            line-height: 1.35;
            letter-spacing: -0.01em;
        }

        .split-text p {
            color: var(--text-light);
            font-size: 15px;
            line-height: 1.8;
            margin: 0 0 24px;
        }

        .check-list {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .check-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 10px 0;
            font-size: 15px;
            color: var(--text);
        }

        .check-list li i {
            color: var(--success);
            font-size: 16px;
            margin-top: 4px;
            flex-shrink: 0;
        }

        /* Steps + FAQ Section */
        .guide-section {
            background: var(--bg);
        }

        .guide-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
        }

        .steps-list {
            list-style: none;
            margin: 0;
            padding: 0;
            position: relative;
        }

        .steps-list::before {
            content: "";
            position: absolute;
            left: 22px;
            top: 30px;
            bottom: 30px;
            width: 2px;
            background: repeating-linear-gradient(180deg, var(--primary) 0 6px, transparent 6px 12px);
            opacity: 0.3;
        }

        .step-item {
            position: relative;
            padding-left: 64px;
            padding-bottom: 36px;
        }

        .step-item:last-child {
            padding-bottom: 0;
        }

        .step-num {
            position: absolute;
            left: 0;
            top: 0;
            width: 46px;
            height: 46px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
            z-index: 2;
        }

        .step-item h3 {
            font-size: 18px;
            font-weight: 600;
            margin: 0 0 6px;
            color: var(--text);
        }

        .step-item p {
            color: var(--text-light);
            font-size: 14px;
            line-height: 1.7;
            margin: 0;
        }

        /* FAQ */
        .faq-list {
            margin: 0;
            padding: 0;
        }

        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            margin-bottom: 14px;
            overflow: hidden;
            transition: box-shadow var(--transition);
        }

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

        .faq-item.active {
            border-color: rgba(37, 99, 235, 0.3);
            box-shadow: var(--shadow);
        }

        .faq-btn {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            background: none;
            border: none;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            text-align: left;
            transition: background var(--transition);
            min-height: 54px;
        }

        .faq-btn:hover {
            background: #F8FAFC;
        }

        .faq-btn i {
            color: var(--text-light);
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }

        .faq-item.active .faq-btn i {
            transform: rotate(180deg);
            color: var(--primary);
        }

        .faq-content {
            display: none;
            padding: 4px 22px 20px;
            background: #F8FAFC;
            border-top: 1px solid rgba(226, 232, 240, 0.6);
        }

        .faq-content p {
            margin: 0;
            font-size: 14px;
            line-height: 1.75;
            color: var(--text-light);
        }

        /* CTA Banner */
        .cta-banner {
            background: linear-gradient(135deg, #2563EB 0%, #1E40AF 100%);
            padding: 80px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-banner::before {
            content: "";
            position: absolute;
            top: -40px;
            right: -40px;
            width: 320px;
            height: 320px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
        }

        .cta-banner::after {
            content: "";
            position: absolute;
            bottom: -60px;
            left: 10%;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
        }

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

        .cta-banner h2 {
            color: #fff;
            font-size: 30px;
            font-weight: 700;
            margin: 0 0 12px;
            letter-spacing: -0.01em;
        }

        .cta-banner p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 16px;
            max-width: 480px;
            margin: 0 auto 28px;
        }

        .cta-banner .btn-white {
            font-size: 16px;
            padding: 14px 34px;
        }

        /* Recommend */
        .recommend-section {
            background: var(--bg);
            padding: 80px 0;
        }

        .recommend-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .recommend-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }

        .recommend-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(37, 99, 235, 0.2);
        }

        .recommend-media {
            height: 180px;
            overflow: hidden;
            position: relative;
        }

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

        .recommend-card:hover .recommend-media img {
            transform: scale(1.05);
        }

        .recommend-body {
            padding: 20px 22px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .recommend-body h3 {
            font-size: 17px;
            font-weight: 600;
            margin: 0 0 8px;
            color: var(--text);
        }

        .recommend-body p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
            margin: 0 0 16px;
            flex: 1;
        }

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

        .recommend-link:hover {
            gap: 10px;
            color: var(--primary-dark);
        }

        /* Footer */
        .site-footer {
            background: #0F172A;
            color: #94A3B8;
            padding: 64px 0 0;
            font-size: 14px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 48px;
            padding-bottom: 48px;
        }

        .footer-brand .logo .logo-text {
            color: #fff;
        }

        .footer-brand .logo-icon {
            background: linear-gradient(135deg, #3B82F6, #0E7490);
        }

        .footer-brand p {
            color: #64748B;
            font-size: 14px;
            line-height: 1.8;
            margin: 16px 0 0;
            max-width: 320px;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            margin: 0 0 16px;
        }

        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

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

        .footer-col ul a {
            color: #64748B;
            font-size: 14px;
            transition: color var(--transition);
        }

        .footer-col ul a:hover {
            color: #fff;
        }

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #64748B;
            font-size: 14px;
        }

        .footer-contact i {
            color: #3B82F6;
            width: 16px;
            text-align: center;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0;
            text-align: center;
        }

        .footer-bottom p {
            margin: 0;
            color: #475569;
            font-size: 13px;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .container {
                padding: 0 20px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 36px;
            }

            .split-grid {
                gap: 40px;
            }
        }

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

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

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

            .header-inner {
                flex-wrap: wrap;
                position: relative;
                padding: 10px 0;
            }

            .hamburger {
                display: flex;
            }

            .header-actions {
                display: none;
            }

            .main-nav {
                display: none;
                width: 100%;
                order: 3;
                padding-top: 12px;
                border-top: 1px solid var(--border);
                margin-top: 8px;
            }

            .main-nav.open {
                display: block;
            }

            .main-nav ul {
                flex-direction: column;
                gap: 2px;
            }

            .main-nav a {
                display: block;
                padding: 12px 16px;
                font-size: 15px;
                border-left: 3px solid transparent;
                border-bottom: none;
                border-radius: 6px;
            }

            .main-nav li.active a {
                border-left-color: var(--primary);
                border-bottom: none;
            }

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

            .split-media img {
                height: 240px;
            }

            .guide-layout {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .recommend-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

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

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

            .hero-cta .btn {
                flex: 1;
                min-width: 160px;
            }
        }

        @media (max-width: 576px) {
            .container {
                padding: 0 16px;
            }

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

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

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

            .split-text h2 {
                font-size: 22px;
            }

            .hero-cta {
                flex-direction: column;
                gap: 12px;
            }

            .hero-cta .btn {
                width: 100%;
                min-width: 0;
            }

            .cta-banner .btn-white {
                width: 100%;
                max-width: 300px;
            }

            .steps-list::before {
                left: 20px;
            }

            .step-item {
                padding-left: 56px;
            }

            .step-num {
                width: 40px;
                height: 40px;
                font-size: 16px;
            }
        }