/* roulang page: index */
/* ========== 设计变量 ========== */
:root {
  --primary: #2463eb;
  --primary-600: #1e50d8;
  --primary-700: #173bb3;
  --primary-50: #eef4ff;
  --secondary: #0cabb5;
  --accent: #f7b32b;
  --success: #18b76b;
  --danger: #ef476f;
  --bg: #f5f7fc;
  --surface: #ffffff;
  --dark: #0a1428;
  --dark-2: #101f38;
  --text: #1a2740;
  --text-muted: #5f7290;
  --border: #e3e9f2;
  --radius: 16px;
  --radius-md: 12px;
  --radius-lg: 24px;
  --shadow-xs: 0 1px 2px rgba(6, 16, 36, 0.05);
  --shadow-sm: 0 4px 14px rgba(6, 16, 36, 0.07);
  --shadow-md: 0 12px 32px rgba(6, 16, 36, 0.1);
  --shadow-lg: 0 28px 64px rgba(6, 16, 36, 0.16);
  --transition: all 0.3s ease;
  --container: 1200px;
  --nav-height: 72px;
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
}

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

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

ul,
ol {
  list-style: none;
}

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

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

.section {
  padding: 96px 0;
}

.section-head {
  max-width: 720px;
  margin: 0 auto 48px;
  text-align: center;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--primary);
  background: var(--primary-50);
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 16px;
}

.section-tag::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--primary);
  border-radius: 50%;
}

.section-head h2 {
  font-size: 38px;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.5px;
  color: var(--text);
  margin-bottom: 16px;
}

.section-head p {
  font-size: 17px;
  color: var(--text-muted);
  line-height: 1.8;
}

/* ========== 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-2px);
}

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

.btn:focus-visible {
  outline: 3px solid rgba(36, 99, 235, 0.35);
  outline-offset: 2px;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 6px 18px rgba(36, 99, 235, 0.32);
}

.btn-primary:hover {
  background: var(--primary-600);
  box-shadow: 0 10px 24px rgba(36, 99, 235, 0.4);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.28);
  backdrop-filter: blur(4px);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.5);
}

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

.btn-outline:hover {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 8px 20px rgba(36, 99, 235, 0.28);
}

.btn-light {
  background: #fff;
  color: var(--primary);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
}

.btn-light:hover {
  background: var(--primary-50);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.22);
}

/* ========== 徽章 / 标签 ========== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  background: var(--primary-50);
  color: var(--primary);
  line-height: 1.6;
}

.badge-accent {
  background: rgba(247, 179, 43, 0.14);
  color: #a96a00;
}

.badge-success {
  background: rgba(24, 183, 107, 0.12);
  color: #0f8a50;
}

/* ========== 导航 Header ========== */
.site-header {
  position: fixed;
  top: 16px;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 0 20px;
  pointer-events: none;
}

.nav-dock {
  max-width: 1240px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 18px;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(18px) saturate(1.4);
  -webkit-backdrop-filter: blur(18px) saturate(1.4);
  border: 1px solid rgba(255, 255, 255, 0.55);
  border-radius: 999px;
  box-shadow: var(--shadow-md);
  padding: 10px 14px 10px 24px;
  pointer-events: auto;
  transition: var(--transition);
}

.site-header.scrolled .nav-dock {
  box-shadow: var(--shadow-lg);
  background: rgba(255, 255, 255, 0.96);
}

.logo {
  font-size: 17px;
  font-weight: 800;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 10px;
  white-space: nowrap;
  letter-spacing: -0.2px;
}

.logo-icon {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 15px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-left: auto;
}

.main-nav a {
  padding: 9px 16px;
  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: var(--primary-50);
}

.main-nav a.active {
  color: var(--primary);
  background: var(--primary-50);
  font-weight: 600;
}

.nav-search {
  display: flex;
  align-items: center;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
  transition: var(--transition);
}

.nav-search input {
  width: 130px;
  padding: 8px 4px 8px 16px;
  font-size: 13px;
  color: var(--text);
  background: transparent;
  transition: var(--transition);
}

.nav-search input::placeholder {
  color: var(--text-muted);
}

.nav-search button {
  padding: 8px 14px;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
}

.nav-search button:hover {
  color: var(--primary);
}

.nav-search:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(36, 99, 235, 0.12);
}

.nav-cta {
  padding: 10px 24px;
  flex-shrink: 0;
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  border: 1px solid var(--border);
}

.nav-toggle:hover {
  background: var(--primary-50);
  color: var(--primary);
}

/* ========== Hero 首屏 ========== */
.hero {
  position: relative;
  min-height: 680px;
  display: flex;
  align-items: center;
  padding: 160px 0 100px;
  background: linear-gradient(135deg, rgba(7, 18, 38, 0.97) 0%, rgba(16, 31, 56, 0.92) 55%, rgba(20, 52, 120, 0.85) 100%), url('/assets/images/backpic/back-1.png') center 20% / cover no-repeat;
  color: #fff;
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  bottom: -60px;
  right: -80px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(36, 99, 235, 0.35), transparent 68%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 820px;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 24px;
}

.hero-badges .badge {
  background: rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255, 255, 255, 0.18);
  font-size: 13px;
}

.hero h1 {
  font-size: 54px;
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -1px;
  margin-bottom: 22px;
}

.hero h1 span {
  background: linear-gradient(90deg, #7db4ff, #53d5c8);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.hero-desc {
  font-size: 19px;
  color: rgba(255, 255, 255, 0.82);
  max-width: 620px;
  line-height: 1.9;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  margin-bottom: 40px;
}

.hero-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.75);
}

.hero-trust i {
  margin-right: 6px;
  color: var(--accent);
}

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

.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);
  box-shadow: var(--shadow-xs);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.45s ease;
}

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

.feature-card:hover::before {
  transform: scaleX(1);
}

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: var(--primary-50);
  color: var(--primary);
  font-size: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  transition: var(--transition);
}

.feature-card:hover .feature-icon {
  background: var(--primary);
  color: #fff;
}

.feature-card h3 {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 12px;
}

.feature-card p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-muted);
}

/* ========== 分类入口 ========== */
.categories {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

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

.category-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  box-shadow: var(--shadow-xs);
  display: flex;
  flex-direction: column;
}

.category-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(36, 99, 235, 0.3);
}

.category-cover {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
}

.category-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.55s ease;
}

.category-card:hover .category-cover img {
  transform: scale(1.06);
}

.category-cover::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10, 20, 40, 0.45), transparent 60%);
}

.category-body {
  padding: 28px 28px 32px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.category-body h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
}

.category-body p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
  flex: 1;
  margin-bottom: 20px;
}

.category-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
}

.category-link i {
  transition: transform 0.3s ease;
}

.category-card:hover .category-link {
  gap: 12px;
}

.category-card:hover .category-link i {
  transform: translateX(3px);
}

/* ========== 登录流程 Process ========== */
.process {
  background: var(--bg);
}

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

.process-step {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 26px 32px;
  box-shadow: var(--shadow-xs);
  transition: var(--transition);
  overflow: hidden;
}

.process-step:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  font-size: 16px;
  font-weight: 800;
  margin-bottom: 20px;
  box-shadow: 0 8px 18px rgba(36, 99, 235, 0.3);
}

.process-step h3 {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 10px;
}

.process-step p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
}

/* ========== 最新资讯 Posts (CMS) ========== */
.posts {
  background: var(--surface);
  border-top: 1px solid var(--border);
}

.posts-layout {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 44px;
  align-items: start;
}

.posts-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.post-item {
  display: flex;
  gap: 22px;
  align-items: flex-start;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 24px;
  transition: var(--transition);
  box-shadow: var(--shadow-xs);
}

.post-item:hover {
  box-shadow: var(--shadow-md);
  border-color: rgba(36, 99, 235, 0.22);
  transform: translateY(-2px);
}

.post-item .badge {
  flex-shrink: 0;
  margin-top: 4px;
}

.post-item-body {
  flex: 1;
  min-width: 0;
}

.post-item-body h3 {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 6px;
}

.post-item-body h3 a {
  color: var(--text);
  transition: var(--transition);
}

.post-item-body h3 a:hover {
  color: var(--primary);
}

.post-item-body p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-date {
  flex-shrink: 0;
  font-size: 12px;
  color: var(--text-muted);
  padding-top: 4px;
  white-space: nowrap;
}

.posts-side {
  display: flex;
  flex-direction: column;
  gap: 20px;
  position: sticky;
  top: 104px;
}

.side-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  min-height: 220px;
  box-shadow: var(--shadow-md);
}

.side-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  inset: 0;
}

.side-card .side-overlay {
  position: relative;
  z-index: 2;
  background: linear-gradient(to top, rgba(7, 18, 38, 0.86), rgba(7, 18, 38, 0.2));
  padding: 28px;
  min-height: 220px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  color: #fff;
}

.side-overlay h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 6px;
}

.side-overlay p {
  font-size: 13px;
  opacity: 0.82;
}

.small-card {
  background: var(--primary-50);
  border: 1px solid rgba(36, 99, 235, 0.12);
  padding: 24px;
  min-height: auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
  box-shadow: var(--shadow-xs);
}

.small-card i {
  font-size: 26px;
  color: var(--primary);
}

.small-card p {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
}

.text-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
}

.text-link:hover {
  color: var(--primary-700);
}

.empty-state {
  background: var(--bg);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 48px 32px;
  text-align: center;
  color: var(--text-muted);
  font-size: 15px;
}

/* ========== 数据统计 Stats ========== */
.stats {
  position: relative;
  padding: 84px 0;
  background: linear-gradient(135deg, rgba(7, 18, 38, 0.94), rgba(18, 39, 76, 0.92)), url('/assets/images/backpic/back-2.png') center / cover no-repeat;
  color: #fff;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  text-align: center;
}

.stat-item {
  padding: 28px 18px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius);
  backdrop-filter: blur(6px);
  transition: var(--transition);
}

.stat-item:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-4px);
}

.stat-num {
  font-size: 42px;
  font-weight: 800;
  display: block;
  background: linear-gradient(90deg, #7db4ff, #53d5c8);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  line-height: 1.2;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.78);
  letter-spacing: 1px;
}

/* ========== 安全保障 Security ========== */
.security {
  background: var(--bg);
}

.security-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

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

.security-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 400px;
}

.security-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(140deg, rgba(36, 99, 235, 0.1), transparent);
}

.security-content h2 {
  font-size: 36px;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

.security-content > p {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.85;
  margin-bottom: 28px;
}

.security-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-bottom: 32px;
}

.security-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  font-weight: 500;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  box-shadow: var(--shadow-xs);
  transition: var(--transition);
}

.security-list li:hover {
  border-color: rgba(36, 99, 235, 0.25);
  transform: translateX(3px);
}

.security-list i {
  color: var(--success);
  font-size: 16px;
}

/* ========== FAQ ========== */
.faq {
  background: var(--surface);
  border-top: 1px solid var(--border);
}

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

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

.faq-item.active {
  border-color: rgba(36, 99, 235, 0.25);
  box-shadow: var(--shadow-sm);
  background: var(--surface);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 600;
  text-align: left;
  color: var(--text);
  cursor: pointer;
  transition: var(--transition);
}

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

.faq-question i {
  font-size: 14px;
  color: var(--text-muted);
  transition: transform 0.35s ease;
}

.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;
}

.faq-answer p {
  padding: 0 24px 22px;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.85;
  border-top: 1px dashed var(--border);
  padding-top: 16px;
  margin: 0 24px 0;
}

.faq-item.active .faq-answer {
  max-height: 400px;
}

/* ========== CTA ========== */
.cta-section {
  position: relative;
  padding: 88px 0;
  background: linear-gradient(135deg, rgba(14, 28, 58, 0.94), rgba(25, 52, 108, 0.88)), url('/assets/images/backpic/back-3.png') center / cover no-repeat;
  color: #fff;
  text-align: center;
}

.cta-card {
  max-width: 720px;
  margin: 0 auto;
}

.cta-card h2 {
  font-size: 36px;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 18px;
}

.cta-card p {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.8;
  margin-bottom: 34px;
}

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

/* ========== Footer 页脚 ========== */
.site-footer {
  background: var(--dark);
  color: rgba(255, 255, 255, 0.75);
  padding: 60px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 44px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.09);
}

.footer-brand .footer-logo {
  font-size: 20px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 16px;
  display: inline-block;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.6);
  max-width: 380px;
}

.footer-col h5 {
  font-size: 15px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.92);
  margin-bottom: 20px;
  letter-spacing: 0.5px;
}

.footer-col a {
  display: block;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  padding: 6px 0;
  transition: var(--transition);
}

.footer-col a:hover {
  color: #fff;
  padding-left: 6px;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 24px 0;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.42);
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.42);
}

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

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .process-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .posts-layout {
    grid-template-columns: 1fr;
  }
  .posts-side {
    position: static;
    flex-direction: row;
  }
  .side-card {
    flex: 1;
  }
  .security-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .security-media img {
    max-height: 360px;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  .nav-search {
    display: none;
  }
  .main-nav {
    gap: 0;
  }
  .main-nav a {
    padding: 8px 12px;
    font-size: 13px;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 64px 0;
  }
  .section-head h2 {
    font-size: 28px;
  }
  .hero {
    min-height: 580px;
    padding: 130px 0 70px;
  }
  .hero h1 {
    font-size: 36px;
  }
  .hero-desc {
    font-size: 16px;
  }
  .category-grid {
    grid-template-columns: 1fr;
  }
  .security-list {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .nav-cta {
    display: none;
  }
  .container {
    padding: 0 20px;
  }
  .nav-toggle {
    display: flex;
    margin-left: auto;
  }
  .main-nav {
    position: absolute;
    top: calc(100% + 12px);
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    padding: 16px;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    margin-left: 0;
    border: 1px solid var(--border);
    opacity: 0;
    transform: translateY(-8px);
    pointer-events: none;
    transition: var(--transition);
  }
  .main-nav.open {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }
  .main-nav a {
    padding: 14px 18px;
    font-size: 15px;
    border-radius: 12px;
    text-align: center;
  }
  .nav-dock {
    padding: 9px 14px;
    border-radius: 24px;
  }
  .logo {
    font-size: 15px;
  }
  .logo-icon {
    width: 30px;
    height: 30px;
    font-size: 13px;
  }
}

@media (max-width: 520px) {
  .features-grid {
    grid-template-columns: 1fr;
  }
  .process-grid {
    grid-template-columns: 1fr;
  }
  .stats-grid {
    grid-template-columns: 1fr;
  }
  .posts-side {
    flex-direction: column;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .hero-trust {
    gap: 12px;
    font-size: 13px;
  }
  .section-head p {
    font-size: 15px;
  }
  .cta-card h2 {
    font-size: 28px;
  }
  .cta-card p {
    font-size: 15px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

/* roulang page: article */
:root {
            --primary: #0d1b2a;
            --primary-light: #1b3a5c;
            --accent: #f5a623;
            --accent-hover: #dd8c13;
            --accent-soft: #fff6e5;
            --bg: #f5f7fb;
            --surface: #ffffff;
            --text: #16283a;
            --text-weak: #6c7a8d;
            --border: #e3e8ef;
            --radius: 18px;
            --radius-sm: 10px;
            --shadow: 0 10px 30px rgba(13, 27, 42, 0.07);
            --shadow-lg: 0 24px 50px rgba(13, 27, 42, 0.14);
            --transition: 0.25s ease;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
        }
        button,
        input {
            font-family: inherit;
            font-size: inherit;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 15px;
            border: 2px solid transparent;
            cursor: pointer;
            transition: transform var(--transition), box-shadow var(--transition), background var(--transition), border-color var(--transition);
        }
        .btn-primary {
            background: var(--accent);
            color: #16283a;
            box-shadow: 0 4px 16px rgba(245, 166, 35, 0.35);
        }
        .btn-primary:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 22px rgba(245, 166, 35, 0.45);
        }
        .btn-outline {
            border-color: var(--border);
            background: var(--surface);
            color: var(--text);
        }
        .btn-outline:hover {
            border-color: var(--accent);
            color: var(--accent-hover);
            transform: translateY(-2px);
        }
        .badge {
            display: inline-block;
            padding: 6px 16px;
            border-radius: 999px;
            background: var(--accent-soft);
            color: #b37508;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.3px;
        }
        /* header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            padding: 14px 0;
            background: transparent;
        }
        .nav-dock {
            display: flex;
            align-items: center;
            gap: 20px;
            max-width: 1220px;
            margin: 0 auto;
            padding: 10px 20px 10px 26px;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-radius: 999px;
            border: 1px solid rgba(255, 255, 255, 0.65);
            box-shadow: 0 10px 34px rgba(13, 27, 42, 0.1);
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 17px;
            color: var(--primary);
            white-space: nowrap;
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 12px;
            background: var(--primary);
            color: var(--accent);
            font-size: 15px;
            flex-shrink: 0;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            margin-left: auto;
        }
        .main-nav a {
            padding: 8px 16px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-weak);
            transition: color var(--transition), background var(--transition);
            white-space: nowrap;
        }
        .main-nav a:hover {
            color: var(--primary);
            background: #f0f2f7;
        }
        .main-nav a.active {
            color: var(--primary);
            background: var(--accent-soft);
            font-weight: 700;
        }
        .nav-search {
            display: flex;
            align-items: center;
            background: #f0f2f7;
            border-radius: 999px;
            padding: 4px 4px 4px 16px;
            border: 1px solid transparent;
            transition: border-color var(--transition);
        }
        .nav-search input {
            border: none;
            outline: none;
            background: transparent;
            width: 132px;
            font-size: 13px;
            color: var(--text);
        }
        .nav-search input::placeholder {
            color: #9aa7b4;
        }
        .nav-search button {
            border: none;
            background: var(--surface);
            width: 34px;
            height: 34px;
            border-radius: 50%;
            cursor: pointer;
            color: var(--text-weak);
            transition: color var(--transition), background var(--transition);
        }
        .nav-search button:hover {
            color: var(--accent-hover);
            background: var(--accent-soft);
        }
        .nav-cta {
            padding: 10px 22px;
            font-size: 14px;
        }
        .nav-toggle {
            display: none;
            border: none;
            background: transparent;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            color: var(--text);
            font-size: 18px;
            cursor: pointer;
            transition: background var(--transition);
        }
        .nav-toggle:hover {
            background: #f0f2f7;
        }
        /* article hero */
        .article-hero {
            position: relative;
            padding: 96px 0 88px;
            background-size: cover;
            background-position: center;
            color: #fff;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(115deg, rgba(13, 27, 42, 0.96) 30%, rgba(13, 27, 42, 0.78) 65%, rgba(13, 27, 42, 0.5));
        }
        .article-hero .container {
            position: relative;
            z-index: 1;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 24px;
        }
        .breadcrumb a {
            color: rgba(255, 255, 255, 0.82);
            transition: color var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--accent);
        }
        .article-hero h1 {
            font-size: clamp(26px, 3.6vw, 42px);
            line-height: 1.3;
            font-weight: 800;
            max-width: 780px;
            margin: 18px 0 14px;
        }
        .article-hero-desc {
            font-size: 16px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.75);
            max-width: 680px;
            margin-bottom: 20px;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
        }
        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 7px;
        }
        /* article body */
        .article-body-section {
            padding: 72px 0 54px;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr;
            gap: 30px;
        }
        .article-card {
            background: var(--surface);
            border-radius: 24px;
            padding: 52px 56px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }
        .article-content {
            font-size: 16px;
            line-height: 1.95;
            color: #2a3b4c;
        }
        .article-content p {
            margin: 16px 0;
        }
        .article-content h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--primary);
            margin: 34px 0 14px;
        }
        .article-content h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            margin: 28px 0 12px;
        }
        .article-content h4 {
            font-size: 17px;
            font-weight: 700;
            color: var(--primary);
            margin: 20px 0 10px;
        }
        .article-content img {
            border-radius: 14px;
            margin: 20px 0;
            box-shadow: var(--shadow);
        }
        .article-content blockquote {
            margin: 22px 0;
            padding: 18px 24px;
            border-left: 4px solid var(--accent);
            background: var(--accent-soft);
            border-radius: 0 12px 12px 0;
            color: #5a4a2c;
            font-style: italic;
        }
        .article-content ul,
        .article-content ol {
            margin: 16px 0;
            padding-left: 26px;
        }
        .article-content li {
            margin: 8px 0;
        }
        .article-content a {
            color: var(--accent-hover);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-content a:hover {
            color: var(--primary);
        }
        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0;
            font-size: 14px;
        }
        .article-content th,
        .article-content td {
            padding: 12px 14px;
            border: 1px solid var(--border);
        }
        .article-content th {
            background: #f5f7fb;
            font-weight: 600;
        }
        .article-content code {
            background: #f0f2f7;
            padding: 2px 8px;
            border-radius: 6px;
            font-size: 14px;
        }
        /* article empty */
        .article-empty {
            text-align: center;
            padding: 60px 20px;
        }
        .article-empty i {
            font-size: 48px;
            color: var(--border);
            margin-bottom: 20px;
        }
        .article-empty h2 {
            font-size: 26px;
            color: var(--primary);
            margin-bottom: 10px;
        }
        .article-empty p {
            color: var(--text-weak);
            margin-bottom: 24px;
        }
        /* article bottom */
        .article-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 18px;
            margin-top: 40px;
            padding-top: 30px;
            border-top: 1px solid var(--border);
        }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
        }
        .tag-label {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-weak);
        }
        .tag {
            padding: 6px 14px;
            background: #f0f2f7;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
            color: var(--primary);
            transition: background var(--transition), color var(--transition);
        }
        .tag:hover {
            background: var(--accent-soft);
            color: var(--accent-hover);
        }
        /* rec section */
        .rec-section {
            padding: 60px 0;
        }
        .section-head {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            margin-bottom: 40px;
        }
        .section-head h2 {
            font-size: 30px;
            font-weight: 800;
            color: var(--primary);
            margin: 10px 0 8px;
        }
        .section-head p {
            color: var(--text-weak);
            font-size: 15px;
            max-width: 560px;
        }
        .rec-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .rec-card {
            background: var(--surface);
            border-radius: 20px;
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .rec-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .rec-card .img-wrap {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
        }
        .rec-card .img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .rec-card:hover .img-wrap img {
            transform: scale(1.05);
        }
        .rec-card-body {
            padding: 22px 24px 26px;
        }
        .rec-card-body h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .rec-card-body p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.75;
            margin-bottom: 16px;
        }
        .rec-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--accent-hover);
            transition: gap var(--transition);
        }
        .rec-link:hover {
            gap: 10px;
        }
        /* faq */
        .faq-section {
            padding: 64px 0;
            background: var(--surface);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        details.faq-item {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 20px 26px;
            transition: box-shadow var(--transition), border-color var(--transition);
        }
        details.faq-item:hover {
            border-color: #d0d7e2;
            box-shadow: var(--shadow);
        }
        details.faq-item[open] {
            border-color: rgba(245, 166, 35, 0.4);
            box-shadow: var(--shadow);
        }
        details.faq-item summary {
            cursor: pointer;
            font-weight: 600;
            font-size: 16px;
            color: var(--primary);
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        details.faq-item summary::-webkit-details-marker {
            display: none;
        }
        details.faq-item summary i {
            color: var(--accent);
            font-size: 14px;
            transition: transform 0.3s ease;
        }
        details.faq-item[open] summary i {
            transform: rotate(45deg);
        }
        .faq-answer {
            color: var(--text-weak);
            font-size: 14px;
            line-height: 1.85;
            padding-top: 14px;
            margin-top: 14px;
            border-top: 1px solid var(--border);
        }
        /* cta */
        .cta-section {
            padding: 80px 0;
            position: relative;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(100deg, rgba(13, 27, 42, 0.94) 30%, rgba(13, 27, 42, 0.72));
        }
        .cta-box {
            position: relative;
            z-index: 1;
            max-width: 680px;
            margin: 0 auto;
            text-align: center;
            color: #fff;
            padding: 20px 0;
        }
        .cta-box h2 {
            font-size: clamp(26px, 3vw, 36px);
            font-weight: 800;
            line-height: 1.35;
            margin-bottom: 14px;
        }
        .cta-box p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.72);
            line-height: 1.8;
            margin-bottom: 30px;
        }
        .cta-actions {
            display: flex;
            justify-content: center;
            gap: 14px;
            flex-wrap: wrap;
        }
        /* footer */
        .site-footer {
            background: var(--primary);
            color: rgba(255, 255, 255, 0.75);
            padding: 72px 0 28px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 0.8fr 0.8fr;
            gap: 44px;
            margin-bottom: 46px;
        }
        .footer-logo {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
            display: inline-block;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.85;
            max-width: 360px;
            color: rgba(255, 255, 255, 0.55);
        }
        .footer-col h5 {
            font-size: 15px;
            color: #fff;
            margin-bottom: 16px;
            font-weight: 700;
        }
        .footer-col a {
            display: block;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            margin-bottom: 10px;
            transition: color var(--transition), padding-left var(--transition);
        }
        .footer-col a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }
        /* responsive */
        @media (max-width: 1024px) {
            .container {
                padding: 0 20px;
            }
            .nav-dock {
                gap: 12px;
                padding-left: 18px;
            }
            .main-nav a {
                padding: 8px 12px;
                font-size: 13px;
            }
            .nav-search input {
                width: 90px;
            }
        }
        @media (max-width: 860px) {
            .site-header {
                padding: 10px 0;
            }
            .nav-dock {
                border-radius: 20px;
                padding: 10px 16px;
            }
            .nav-search,
            .nav-cta {
                display: none;
            }
            .main-nav {
                display: none;
                position: absolute;
                top: calc(100% + 10px);
                left: 20px;
                right: 20px;
                background: #fff;
                border-radius: 20px;
                box-shadow: var(--shadow-lg);
                border: 1px solid var(--border);
                flex-direction: column;
                align-items: stretch;
                padding: 14px;
                gap: 6px;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 13px 18px;
                border-radius: 12px;
                font-size: 15px;
            }
            .nav-toggle {
                display: inline-flex;
                align-items: center;
                justify-content: center;
                margin-left: auto;
            }
            .main-nav a.active {
                background: var(--accent-soft);
            }
            .article-hero {
                padding: 72px 0 64px;
            }
            .article-card {
                padding: 36px 30px;
            }
            .rec-grid {
                grid-template-columns: 1fr;
                gap: 22px;
            }
            .rec-card {
                display: flex;
                align-items: stretch;
                flex-direction: row;
            }
            .rec-card .img-wrap {
                width: 220px;
                flex-shrink: 0;
                aspect-ratio: auto;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 600px) {
            .container {
                padding: 0 16px;
            }
            .logo {
                font-size: 15px;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 13px;
                border-radius: 10px;
            }
            .article-hero {
                padding: 56px 0 50px;
            }
            .breadcrumb {
                font-size: 12px;
                margin-bottom: 16px;
            }
            .article-hero h1 {
                font-size: 24px;
            }
            .article-hero-desc {
                font-size: 14px;
            }
            .article-meta {
                gap: 12px;
                font-size: 12px;
            }
            .article-body-section {
                padding: 40px 0 32px;
            }
            .article-card {
                padding: 26px 20px;
                border-radius: 16px;
            }
            .article-content {
                font-size: 15px;
                line-height: 1.85;
            }
            .article-content h2 {
                font-size: 20px;
            }
            .article-content h3 {
                font-size: 18px;
            }
            .article-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
            .rec-card {
                flex-direction: column;
            }
            .rec-card .img-wrap {
                width: 100%;
                aspect-ratio: 16 / 9;
            }
            .section-head h2 {
                font-size: 24px;
            }
            .faq-section {
                padding: 44px 0;
            }
            details.faq-item {
                padding: 16px 18px;
            }
            details.faq-item summary {
                font-size: 15px;
            }
            .cta-section {
                padding: 54px 0;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: center;
                text-align: center;
            }
        }
        @media (max-width: 400px) {
            .logo .logo-text {
                max-width: 150px;
                overflow: hidden;
                text-overflow: ellipsis;
                white-space: nowrap;
            }
        }

/* roulang page: category1 */
:root{
    --primary:#1e40af;
    --primary-dark:#172f85;
    --primary-light:#3b82f6;
    --accent:#f59e0b;
    --accent-light:#fbbf24;
    --deep:#0b1220;
    --deep-soft:#111c30;
    --bg:#f4f7fb;
    --bg-white:#ffffff;
    --text:#0f172a;
    --text-body:#334155;
    --text-weak:#64748b;
    --border:#e2e8f0;
    --radius-sm:10px;
    --radius:16px;
    --radius-lg:24px;
    --shadow-sm:0 2px 10px rgba(15,23,42,.05);
    --shadow:0 12px 36px rgba(15,23,42,.08);
    --shadow-lg:0 24px 64px rgba(15,23,42,.14);
    --transition:.3s ease;
    --font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,sans-serif;
}
*,*::before,*::after{
    box-sizing:border-box;
    margin:0;
    padding:0;
}
html{
    scroll-behavior:smooth;
}
body{
    font-family:var(--font-family);
    background:var(--bg);
    color:var(--text-body);
    line-height:1.75;
    font-size:16px;
    -webkit-font-smoothing:antialiased;
}
img{
    max-width:100%;
    display:block;
}
a{
    color:inherit;
    text-decoration:none;
    transition:color var(--transition);
}
button,input,select,textarea{
    font-family:inherit;
    font-size:inherit;
    border:none;
    outline:none;
    background:none;
}
.container{
    max-width:1240px;
    margin:0 auto;
    padding:0 24px;
}
.section{
    padding:96px 0;
}
.section-alt{
    background:var(--bg-white);
}
.section-head{
    max-width:720px;
    margin:0 auto 56px;
    text-align:center;
}
.section-tag{
    display:inline-flex;
    align-items:center;
    gap:8px;
    background:rgba(30,64,175,.08);
    color:var(--primary);
    font-size:14px;
    font-weight:600;
    padding:6px 18px;
    border-radius:30px;
    margin-bottom:18px;
    letter-spacing:.5px;
}
.section-head h2{
    font-size:38px;
    line-height:1.25;
    color:var(--text);
    font-weight:800;
    letter-spacing:-.5px;
}
.section-head p{
    margin-top:16px;
    color:var(--text-weak);
    font-size:17px;
}
.btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    font-size:15px;
    font-weight:600;
    height:46px;
    padding:0 24px;
    border-radius:14px;
    cursor:pointer;
    transition:all var(--transition);
    border:1px solid transparent;
    white-space:nowrap;
}
.btn-primary{
    background:var(--primary);
    color:#fff;
    box-shadow:0 8px 24px rgba(30,64,175,.26);
}
.btn-primary:hover{
    background:var(--primary-dark);
    transform:translateY(-2px);
    box-shadow:0 12px 32px rgba(30,64,175,.34);
    color:#fff;
}
.btn-accent{
    background:var(--accent);
    color:#0f172a;
    box-shadow:0 8px 24px rgba(245,158,11,.28);
}
.btn-accent:hover{
    background:var(--accent-light);
    transform:translateY(-2px);
    color:#0f172a;
}
.btn-ghost{
    background:transparent;
    color:#fff;
    border-color:rgba(255,255,255,.35);
}
.btn-ghost:hover{
    background:rgba(255,255,255,.12);
    border-color:rgba(255,255,255,.6);
    color:#fff;
}
.btn-ghost-dark{
    background:transparent;
    color:var(--text);
    border-color:var(--border);
}
.btn-ghost-dark:hover{
    border-color:var(--primary);
    color:var(--primary);
    background:rgba(30,64,175,.04);
}
.badge{
    display:inline-block;
    font-size:12px;
    font-weight:600;
    padding:4px 12px;
    border-radius:20px;
    background:rgba(30,64,175,.09);
    color:var(--primary);
}
.badge-accent{
    background:rgba(245,158,11,.14);
    color:#b45309;
}
.badge-green{
    background:rgba(16,185,129,.12);
    color:#047857;
}
.badge-red{
    background:rgba(239,68,68,.1);
    color:#b91c1c;
}
/* ===== Header / Floating Dock ===== */
.site-header{
    position:sticky;
    top:12px;
    z-index:1000;
    display:flex;
    justify-content:center;
    padding:0 20px;
    margin:14px 0 4px;
    pointer-events:none;
}
.nav-dock{
    pointer-events:auto;
    position:relative;
    max-width:1280px;
    width:100%;
    min-height:64px;
    background:rgba(255,255,255,.92);
    -webkit-backdrop-filter:blur(16px);
    backdrop-filter:blur(16px);
    border:1px solid rgba(226,232,240,.9);
    border-radius:50px;
    box-shadow:0 14px 44px rgba(2,6,23,.12);
    display:flex;
    align-items:center;
    gap:14px;
    padding:8px 10px 8px 22px;
    transition:box-shadow var(--transition);
}
.nav-dock:hover{
    box-shadow:0 18px 52px rgba(2,6,23,.16);
}
.logo{
    display:flex;
    align-items:center;
    gap:10px;
    font-size:18px;
    font-weight:800;
    color:var(--text);
    white-space:nowrap;
}
.logo-icon{
    width:38px;
    height:38px;
    border-radius:12px;
    background:linear-gradient(135deg,var(--primary),var(--primary-light));
    color:#fff;
    display:flex;
    align-items:center;
    justify-content:center;
    font-size:17px;
    box-shadow:0 6px 16px rgba(30,64,175,.35);
}
.main-nav{
    display:flex;
    align-items:center;
    justify-content:center;
    gap:4px;
    flex:1;
    flex-wrap:wrap;
}
.main-nav a{
    color:var(--text-body);
    font-size:15px;
    font-weight:500;
    padding:9px 18px;
    border-radius:30px;
    transition:all var(--transition);
    white-space:nowrap;
    position:relative;
}
.main-nav a:hover{
    background:#f1f5f9;
    color:var(--primary);
}
.main-nav a.active{
    background:var(--primary);
    color:#fff;
    box-shadow:0 6px 18px rgba(30,64,175,.3);
}
.nav-search{
    display:flex;
    align-items:center;
    background:#f1f5f9;
    border:1px solid transparent;
    border-radius:30px;
    padding:3px 3px 3px 16px;
    transition:all var(--transition);
    max-width:190px;
}
.nav-search:focus-within{
    background:#fff;
    border-color:var(--primary);
    box-shadow:0 0 0 3px rgba(30,64,175,.1);
}
.nav-search input{
    width:120px;
    padding:6px 0;
    font-size:14px;
    color:var(--text);
    background:transparent;
}
.nav-search input::placeholder{
    color:var(--text-weak);
}
.nav-search button{
    width:32px;
    height:32px;
    border-radius:50%;
    background:var(--primary);
    color:#fff;
    display:flex;
    align-items:center;
    justify-content:center;
    font-size:14px;
    cursor:pointer;
    transition:background var(--transition);
}
.nav-search button:hover{
    background:var(--primary-dark);
}
.nav-toggle{
    display:none;
    width:42px;
    height:42px;
    border-radius:12px;
    border:1px solid var(--border);
    color:var(--text);
    font-size:18px;
    cursor:pointer;
    align-items:center;
    justify-content:center;
    background:#fff;
    transition:all var(--transition);
}
.nav-toggle:hover{
    border-color:var(--primary);
    color:var(--primary);
}
/* ===== Page Hero ===== */
.page-hero{
    position:relative;
    min-height:520px;
    display:flex;
    align-items:center;
    background-image:url('/assets/images/backpic/back-1.png');
    background-size:cover;
    background-position:center;
    padding:80px 0 100px;
    overflow:hidden;
}
.page-hero::before{
    content:"";
    position:absolute;
    inset:0;
    background:linear-gradient(120deg,rgba(11,18,32,.88) 0%,rgba(30,64,175,.72) 60%,rgba(59,130,246,.45) 100%);
}
.hero-content{
    position:relative;
    z-index:2;
    max-width:760px;
}
.hero-badge{
    display:inline-flex;
    align-items:center;
    gap:8px;
    background:rgba(255,255,255,.14);
    border:1px solid rgba(255,255,255,.22);
    color:#fff;
    font-size:14px;
    font-weight:600;
    padding:7px 18px;
    border-radius:30px;
    margin-bottom:24px;
}
.hero-badge i{
    color:var(--accent);
}
.page-hero h1{
    font-size:52px;
    line-height:1.18;
    color:#fff;
    font-weight:800;
    letter-spacing:-1px;
    margin-bottom:20px;
}
.page-hero p{
    font-size:18px;
    color:rgba(255,255,255,.85);
    max-width:620px;
    line-height:1.85;
    margin-bottom:32px;
}
.hero-actions{
    display:flex;
    gap:14px;
    flex-wrap:wrap;
}
.hero-metrics{
    display:flex;
    gap:36px;
    margin-top:52px;
    flex-wrap:wrap;
}
.hero-metric{
    display:flex;
    flex-direction:column;
}
.hero-metric strong{
    font-size:30px;
    color:#fff;
    font-weight:800;
    line-height:1.2;
}
.hero-metric span{
    font-size:13px;
    color:rgba(255,255,255,.68);
    margin-top:2px;
}
/* ===== Channel Cards ===== */
.channel-grid{
    display:grid;
    grid-template-columns:repeat(2,1fr);
    gap:28px;
}
.channel-card{
    background:#fff;
    border:1px solid var(--border);
    border-radius:var(--radius-lg);
    overflow:hidden;
    display:flex;
    flex-direction:column;
    transition:all var(--transition);
    box-shadow:var(--shadow-sm);
}
.channel-card:hover{
    transform:translateY(-6px);
    box-shadow:var(--shadow-lg);
    border-color:rgba(30,64,175,.2);
}
.channel-media{
    position:relative;
    height:210px;
    overflow:hidden;
    background:var(--deep-soft);
}
.channel-media img{
    width:100%;
    height:100%;
    object-fit:cover;
    transition:transform .5s ease;
}
.channel-card:hover .channel-media img{
    transform:scale(1.04);
}
.channel-overlay{
    position:absolute;
    inset:0;
    background:linear-gradient(180deg,transparent 40%,rgba(11,18,32,.55));
    display:flex;
    align-items:flex-end;
    padding:20px;
}
.channel-overlay .badge{
    background:rgba(255,255,255,.92);
    color:var(--primary);
    backdrop-filter:blur(6px);
}
.channel-body{
    padding:28px;
    display:flex;
    flex-direction:column;
    flex:1;
}
.channel-body h3{
    font-size:22px;
    color:var(--text);
    font-weight:700;
    margin-bottom:10px;
}
.channel-body p{
    color:var(--text-weak);
    font-size:15px;
    line-height:1.8;
    flex:1;
}
.channel-tags{
    display:flex;
    flex-wrap:wrap;
    gap:8px;
    margin:18px 0 22px;
}
.channel-link{
    display:inline-flex;
    align-items:center;
    gap:8px;
    font-weight:600;
    color:var(--primary);
    font-size:15px;
    transition:gap var(--transition);
}
.channel-link:hover{
    gap:12px;
    color:var(--primary-dark);
}
/* ===== Steps ===== */
.steps-section{
    background:var(--deep);
    position:relative;
    overflow:hidden;
}
.steps-section::before{
    content:"";
    position:absolute;
    top:-120px;
    right:-80px;
    width:360px;
    height:360px;
    border-radius:50%;
    background:rgba(59,130,246,.12);
    filter:blur(80px);
}
.steps-section .section-tag{
    background:rgba(255,255,255,.1);
    color:var(--accent);
}
.steps-section .section-head h2{
    color:#fff;
}
.steps-section .section-head p{
    color:rgba(255,255,255,.65);
}
.steps-grid{
    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:24px;
    position:relative;
    z-index:2;
}
.step-card{
    position:relative;
    background:rgba(255,255,255,.05);
    border:1px solid rgba(255,255,255,.1);
    border-radius:var(--radius-lg);
    padding:34px 26px;
    transition:all var(--transition);
}
.step-card:hover{
    background:rgba(255,255,255,.09);
    border-color:rgba(255,255,255,.22);
    transform:translateY(-4px);
}
.step-num{
    font-size:13px;
    font-weight:700;
    color:var(--accent);
    letter-spacing:2px;
    margin-bottom:22px;
    display:flex;
    align-items:center;
    gap:10px;
}
.step-num::after{
    content:"";
    flex:1;
    height:1px;
    background:rgba(255,255,255,.14);
}
.step-icon{
    width:52px;
    height:52px;
    border-radius:16px;
    background:linear-gradient(135deg,var(--primary),var(--primary-light));
    color:#fff;
    display:flex;
    align-items:center;
    justify-content:center;
    font-size:20px;
    margin-bottom:20px;
    box-shadow:0 8px 24px rgba(30,64,175,.4);
}
.step-card h3{
    color:#fff;
    font-size:19px;
    font-weight:700;
    margin-bottom:10px;
}
.step-card p{
    color:rgba(255,255,255,.68);
    font-size:14px;
    line-height:1.8;
}
/* ===== Scenario Table ===== */
.scenario-wrap{
    background:#fff;
    border:1px solid var(--border);
    border-radius:var(--radius-lg);
    overflow:hidden;
    box-shadow:var(--shadow-sm);
}
.scenario-row{
    display:grid;
    grid-template-columns:180px 1fr 180px;
    align-items:center;
    gap:20px;
    padding:22px 28px;
    border-bottom:1px solid var(--border);
    transition:background var(--transition);
}
.scenario-row:last-child{
    border-bottom:none;
}
.scenario-row:hover{
    background:#f8faff;
}
.scenario-role{
    display:flex;
    align-items:center;
    gap:12px;
    font-weight:600;
    color:var(--text);
}
.scenario-role i{
    width:38px;
    height:38px;
    border-radius:12px;
    display:flex;
    align-items:center;
    justify-content:center;
    background:rgba(30,64,175,.1);
    color:var(--primary);
    font-size:15px;
}
.scenario-desc{
    color:var(--text-weak);
    font-size:14px;
    line-height:1.7;
}
.scenario-action{
    text-align:right;
}
.scenario-action .btn{
    height:38px;
    font-size:13px;
    padding:0 18px;
    border-radius:10px;
}
/* ===== Metric Band ===== */
.metric-band{
    background:linear-gradient(135deg,#020617 0%,#0f172a 50%,#1e3a8a 100%);
    padding:72px 0;
    position:relative;
    overflow:hidden;
}
.metric-band::after{
    content:"";
    position:absolute;
    bottom:-80px;
    left:20%;
    width:300px;
    height:300px;
    background:rgba(245,158,11,.1);
    border-radius:50%;
    filter:blur(70px);
}
.metric-grid{
    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:24px;
    position:relative;
    z-index:2;
}
.metric-item{
    text-align:center;
    padding:28px 16px;
    background:rgba(255,255,255,.05);
    border:1px solid rgba(255,255,255,.1);
    border-radius:var(--radius-lg);
    transition:all var(--transition);
}
.metric-item:hover{
    background:rgba(255,255,255,.1);
    transform:translateY(-4px);
}
.metric-item i{
    font-size:24px;
    color:var(--accent);
    margin-bottom:14px;
}
.metric-item strong{
    display:block;
    font-size:34px;
    color:#fff;
    font-weight:800;
    letter-spacing:-1px;
}
.metric-item span{
    color:rgba(255,255,255,.6);
    font-size:14px;
    display:block;
    margin-top:6px;
}
/* ===== FAQ ===== */
.faq-list{
    max-width:860px;
    margin:0 auto;
    display:flex;
    flex-direction:column;
    gap:16px;
}
.faq-item{
    background:#fff;
    border:1px solid var(--border);
    border-radius:var(--radius);
    box-shadow:var(--shadow-sm);
    overflow:hidden;
    transition:all var(--transition);
}
.faq-item:hover{
    border-color:rgba(30,64,175,.25);
    box-shadow:var(--shadow);
}
.faq-item summary{
    list-style:none;
    cursor:pointer;
    padding:22px 26px;
    display:flex;
    align-items:center;
    gap:16px;
    font-size:17px;
    font-weight:600;
    color:var(--text);
    transition:background var(--transition);
}
.faq-item summary::-webkit-details-marker{
    display:none;
}
.faq-item summary:hover{
    background:#f8faff;
}
.faq-item summary i{
    color:var(--primary);
    font-size:18px;
    flex-shrink:0;
}
.faq-item .faq-answer{
    padding:0 26px 24px 60px;
    color:var(--text-weak);
    font-size:15px;
    line-height:1.85;
}
.faq-item details[open] summary{
    background:#f8faff;
    border-bottom:1px solid var(--border);
}
/* ===== CTA ===== */
.cta-section{
    background:var(--bg-white);
}
.cta-box{
    position:relative;
    background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);
    border-radius:var(--radius-lg);
    padding:64px 56px;
    overflow:hidden;
    text-align:center;
    box-shadow:0 24px 60px rgba(30,64,175,.3);
}
.cta-box::before{
    content:"";
    position:absolute;
    width:260px;
    height:260px;
    border-radius:50%;
    border:50px solid rgba(255,255,255,.06);
    top:-100px;
    right:-60px;
}
.cta-box h2{
    font-size:34px;
    color:#fff;
    font-weight:800;
    letter-spacing:-.5px;
    position:relative;
}
.cta-box p{
    color:rgba(255,255,255,.82);
    max-width:520px;
    margin:16px auto 32px;
    font-size:16px;
    position:relative;
}
.cta-actions{
    display:flex;
    gap:14px;
    justify-content:center;
    flex-wrap:wrap;
    position:relative;
}
/* ===== Footer ===== */
.site-footer{
    background:var(--deep);
    padding:70px 0 0;
    color:rgba(255,255,255,.65);
}
.footer-grid{
    display:grid;
    grid-template-columns:2fr 1fr 1fr;
    gap:48px;
    padding-bottom:48px;
    border-bottom:1px solid rgba(255,255,255,.08);
}
.footer-logo{
    display:inline-flex;
    align-items:center;
    gap:10px;
    font-size:20px;
    font-weight:800;
    color:#fff;
    margin-bottom:16px;
}
.footer-brand p{
    font-size:14px;
    line-height:1.85;
    max-width:340px;
    color:rgba(255,255,255,.5);
}
.footer-col h5{
    color:#fff;
    font-size:16px;
    font-weight:600;
    margin-bottom:18px;
}
.footer-col a{
    display:block;
    padding:6px 0;
    font-size:14px;
    color:rgba(255,255,255,.55);
    transition:all var(--transition);
}
.footer-col a:hover{
    color:var(--accent);
    padding-left:6px;
}
.footer-bottom{
    display:flex;
    justify-content:space-between;
    align-items:center;
    padding:22px 0;
    flex-wrap:wrap;
    gap:10px;
    font-size:13px;
    color:rgba(255,255,255,.35);
}
/* ===== Responsive ===== */
@media (max-width:1024px){
    .steps-grid{
        grid-template-columns:repeat(2,1fr);
    }
    .metric-grid{
        grid-template-columns:repeat(2,1fr);
    }
    .nav-search{
        display:none;
    }
}
@media (max-width:800px){
    .section{
        padding:72px 0;
    }
    .page-hero{
        min-height:440px;
        padding:60px 0 70px;
    }
    .page-hero h1{
        font-size:38px;
    }
    .channel-grid{
        grid-template-columns:1fr;
    }
    .scenario-row{
        grid-template-columns:1fr;
        gap:12px;
    }
    .scenario-action{
        text-align:left;
    }
    .footer-grid{
        grid-template-columns:1fr;
        gap:32px;
    }
    .nav-dock{
        padding:6px 8px 6px 16px;
        border-radius:34px;
    }
    .logo{
        font-size:15px;
    }
    .logo-icon{
        width:34px;
        height:34px;
        font-size:15px;
    }
    .main-nav{
        position:absolute;
        top:calc(100% + 12px);
        left:0;
        right:0;
        flex-direction:column;
        align-items:center;
        background:#fff;
        border-radius:22px;
        padding:14px;
        gap:4px;
        box-shadow:var(--shadow-lg);
        border:1px solid var(--border);
        display:none;
    }
    .nav-dock.open .main-nav{
        display:flex;
    }
    .main-nav a{
        width:100%;
        text-align:center;
        font-size:15px;
        padding:12px 12px;
        border-radius:14px;
    }
    .nav-toggle{
        display:inline-flex;
    }
    .nav-cta{
        display:none;
    }
    .hero-metrics{
        gap:22px;
    }
    .hero-metric strong{
        font-size:24px;
    }
    .cta-box{
        padding:42px 24px;
    }
}
@media (max-width:520px){
    .section{
        padding:60px 0;
    }
    .container{
        padding:0 18px;
    }
    .page-hero h1{
        font-size:30px;
    }
    .page-hero p{
        font-size:15px;
    }
    .steps-grid,
    .metric-grid{
        grid-template-columns:1fr;
    }
    .section-head h2{
        font-size:28px;
    }
    .hero-actions .btn{
        width:100%;
    }
    .footer-bottom{
        flex-direction:column;
        justify-content:center;
    }
    .faq-item summary{
        font-size:15px;
        padding:18px 18px;
    }
    .faq-item .faq-answer{
        padding:0 18px 20px 44px;
    }
}

/* roulang page: category3 */
/* ===== Design Variables ===== */
:root {
  --primary: #3b82f6;
  --primary-dark: #2563eb;
  --primary-light: #dbeafe;
  --accent: #06b6d4;
  --accent-light: #cffafe;
  --dark: #0f172a;
  --dark-soft: #1e293b;
  --bg: #f8fafc;
  --bg-card: #ffffff;
  --text: #0f172a;
  --text-weak: #64748b;
  --border: #e2e8f0;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.08);
  --shadow-md: 0 8px 24px rgba(0,0,0,.08);
  --shadow-lg: 0 20px 40px rgba(0,0,0,.12);
  --transition: all .25s ease;
  --container: 1200px;
  --space-section: 80px;
}

/* ===== Reset & Base ===== */
*, *::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", sans-serif; background: var(--bg); color: var(--text); line-height: 1.7; font-size: 16px; -webkit-font-smoothing: antialiased; }
a { text-decoration: none; color: inherit; transition: var(--transition); }
img { max-width: 100%; display: block; }
button, input { font-family: inherit; border: none; outline: none; background: none; }
ul { list-style: none; }
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

/* ===== Buttons & Badges ===== */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 28px; border-radius: 999px; font-weight: 600; font-size: 15px; line-height: 1; cursor: pointer; transition: var(--transition); border: 2px solid transparent; }
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 4px 14px rgba(59,130,246,.35); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(59,130,246,.4); }
.btn-primary:active { transform: translateY(0); }
.btn-outline { background: transparent; color: var(--primary); border-color: var(--primary); }
.btn-outline:hover { background: var(--primary-light); transform: translateY(-2px); }
.btn-light { background: #fff; color: var(--dark); box-shadow: var(--shadow-md); }
.btn-light:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.badge { display: inline-block; padding: 4px 14px; border-radius: 999px; font-size: 13px; font-weight: 600; }
.badge-primary { background: var(--primary-light); color: var(--primary-dark); }
.badge-accent { background: var(--accent-light); color: #0e7490; }
.badge-dark { background: var(--dark-soft); color: #e2e8f0; }

/* ===== Floating Dock Header ===== */
.site-header { background: transparent; padding: 20px 0 0; position: relative; z-index: 100; }
.nav-dock { max-width: var(--container); margin: 0 auto; display: flex; align-items: center; gap: 18px; background: rgba(255,255,255,.92); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); border-radius: 999px; padding: 12px 20px; box-shadow: var(--shadow-md); border: 1px solid rgba(255,255,255,.7); }
.logo { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; font-size: 18px; color: var(--dark); white-space: nowrap; }
.logo .logo-icon { display: inline-flex; align-items: center; justify-content: center; width: 36px; height: 36px; border-radius: 10px; background: linear-gradient(135deg, var(--primary), var(--accent)); color: #fff; font-size: 16px; box-shadow: 0 4px 12px rgba(59,130,246,.3); }
.main-nav { display: flex; align-items: center; gap: 2px; flex: 1; justify-content: center; }
.main-nav a { padding: 8px 16px; border-radius: 999px; font-size: 14px; font-weight: 500; color: var(--text-weak); white-space: nowrap; }
.main-nav a:hover { color: var(--primary); background: var(--primary-light); }
.main-nav a.active { color: #fff; background: var(--primary); font-weight: 600; box-shadow: 0 4px 12px rgba(59,130,246,.3); }
.nav-search { display: flex; align-items: center; background: var(--bg); border-radius: 999px; padding: 4px 4px 4px 16px; border: 1px solid var(--border); width: 200px; transition: var(--transition); }
.nav-search:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(59,130,246,.15); }
.nav-search input { flex: 1; font-size: 13px; color: var(--text); background: transparent; }
.nav-search input::placeholder { color: #94a3b8; }
.nav-search button { width: 32px; height: 32px; border-radius: 50%; background: var(--primary); color: #fff; font-size: 13px; cursor: pointer; transition: var(--transition); display: flex; align-items: center; justify-content: center; }
.nav-search button:hover { background: var(--primary-dark); }
.nav-cta { padding: 10px 22px !important; font-size: 14px !important; border-radius: 999px; white-space: nowrap; }
.nav-toggle { display: none; width: 40px; height: 40px; border-radius: 50%; background: var(--bg); border: 1px solid var(--border); color: var(--dark); font-size: 16px; cursor: pointer; align-items: center; justify-content: center; }
.nav-toggle:hover { background: var(--primary-light); color: var(--primary); }

/* ===== Hero ===== */
.page-hero { position: relative; padding: 100px 0 80px; background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%); overflow: hidden; }
.page-hero::before { content: ''; position: absolute; inset: 0; background: url('/assets/images/backpic/back-2.png') center/cover no-repeat; opacity: .25; }
.page-hero::after { content: ''; position: absolute; inset: 0; background: radial-gradient(ellipse at 80% 20%, rgba(59,130,246,.25), transparent 60%); }
.page-hero .container { position: relative; z-index: 2; }
.hero-inner { max-width: 800px; }
.hero-crumb { display: inline-flex; align-items: center; gap: 8px; background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.15); padding: 6px 18px; border-radius: 999px; color: #cbd5e1; font-size: 13px; margin-bottom: 24px; }
.hero-crumb a:hover { color: #fff; }
.hero-crumb i { font-size: 10px; }
.page-hero h1 { font-size: 42px; line-height: 1.25; font-weight: 800; color: #fff; letter-spacing: .5px; margin-bottom: 16px; }
.page-hero h1 span { background: linear-gradient(90deg, var(--primary), var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.page-hero p { font-size: 17px; color: #cbd5e1; line-height: 1.8; max-width: 640px; }
.hero-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; margin-top: 28px; }
.hero-meta .btn { margin-right: 4px; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 32px; }
.hero-tags .badge { background: rgba(255,255,255,.08); color: #e2e8f0; border: 1px solid rgba(255,255,255,.12); font-size: 12px; padding: 6px 16px; }

/* ===== Section ===== */
.section { padding: var(--space-section) 0; }
.section-title { font-size: 32px; font-weight: 800; color: var(--dark); line-height: 1.3; margin-bottom: 12px; letter-spacing: .3px; }
.section-subtitle { font-size: 16px; color: var(--text-weak); max-width: 600px; line-height: 1.8; }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; margin-bottom: 48px; flex-wrap: wrap; }
.section-head.center { flex-direction: column; align-items: center; text-align: center; gap: 12px; }
.section-head .section-subtitle { text-align: center; }

/* ===== Cards ===== */
.card { background: var(--bg-card); border-radius: var(--radius-lg); border: 1px solid var(--border); box-shadow: var(--shadow-sm); overflow: hidden; transition: var(--transition); }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.card-body { padding: 28px; }
.card-icon { display: inline-flex; align-items: center; justify-content: center; width: 48px; height: 48px; border-radius: 12px; font-size: 20px; margin-bottom: 16px; }
.card-icon.blue { background: var(--primary-light); color: var(--primary); }
.card-icon.cyan { background: var(--accent-light); color: #0e7490; }
.card-icon.indigo { background: #e0e7ff; color: #4f46e5; }
.card-icon.amber { background: #fef3c7; color: #d97706; }
.card-icon.emerald { background: #d1fae5; color: #059669; }
.card h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; color: var(--dark); }
.card p { font-size: 14px; color: var(--text-weak); line-height: 1.8; }

/* ===== Grid ===== */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.grid-feature { display: grid; grid-template-columns: 1.2fr 1fr; gap: 48px; align-items: center; }
.feature-img { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg); }
.feature-img img { width: 100%; height: 380px; object-fit: cover; transition: transform .5s ease; }
.feature-img:hover img { transform: scale(1.03); }

/* ===== Process / Steps ===== */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; position: relative; }
.step-card { background: var(--bg-card); border-radius: var(--radius-md); padding: 28px 24px; border: 1px solid var(--border); box-shadow: var(--shadow-sm); transition: var(--transition); position: relative; text-align: center; }
.step-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.step-num { display: inline-flex; align-items: center; justify-content: center; width: 40px; height: 40px; border-radius: 50%; background: var(--primary); color: #fff; font-weight: 800; font-size: 17px; margin-bottom: 16px; box-shadow: 0 4px 12px rgba(59,130,246,.35); }
.step-card h4 { font-size: 15px; font-weight: 700; margin-bottom: 8px; }
.step-card p { font-size: 13px; color: var(--text-weak); line-height: 1.7; }

/* ===== FAQ ===== */
.faq-wrap { max-width: 820px; margin: 0 auto; }
.faq-item { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-md); margin-bottom: 12px; overflow: hidden; transition: var(--transition); }
.faq-item.open { box-shadow: var(--shadow-md); border-color: var(--primary); }
.faq-q { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 20px 24px; cursor: pointer; font-weight: 600; font-size: 15px; color: var(--dark); }
.faq-q i { width: 28px; height: 28px; border-radius: 50%; background: var(--bg); display: flex; align-items: center; justify-content: center; font-size: 12px; color: var(--primary); transition: var(--transition); flex-shrink: 0; }
.faq-item.open .faq-q i { background: var(--primary); color: #fff; transform: rotate(45deg); }
.faq-a { display: none; padding: 0 24px 22px; font-size: 14px; color: var(--text-weak); line-height: 1.9; background: var(--bg-card); }
.faq-item.open .faq-a { display: block; }

/* ===== Content List ===== */
.content-list { max-width: 860px; margin: 0 auto; }
.content-item { display: flex; gap: 20px; padding: 24px; background: var(--bg-card); border-radius: var(--radius-md); border: 1px solid var(--border); margin-bottom: 14px; box-shadow: var(--shadow-sm); transition: var(--transition); align-items: center; }
.content-item:hover { box-shadow: var(--shadow-md); transform: translateX(4px); border-left: 4px solid var(--primary); }
.content-item .content-icon { width: 52px; height: 52px; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 20px; background: var(--primary-light); color: var(--primary); flex-shrink: 0; }
.content-item h4 { font-size: 16px; font-weight: 700; margin-bottom: 6px; }
.content-item p { font-size: 14px; color: var(--text-weak); }
.content-item .badge { flex-shrink: 0; }

/* ===== Statistics ===== */
.stats-banner { background: linear-gradient(135deg, var(--dark) 0%, var(--dark-soft) 100%); border-radius: var(--radius-lg); padding: 56px 48px; position: relative; overflow: hidden; }
.stats-banner::before { content: ''; position: absolute; inset: 0; background: url('/assets/images/backpic/back-1.png') center/cover no-repeat; opacity: .08; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; position: relative; z-index: 2; }
.stat-item { text-align: center; padding: 12px; }
.stat-number { font-size: 40px; font-weight: 800; color: #fff; line-height: 1.2; margin-bottom: 6px; font-family: inherit; }
.stat-number i { font-size: 24px; margin-right: 6px; background: linear-gradient(45deg, var(--primary), var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.stat-label { font-size: 14px; color: #94a3b8; }

/* ===== CTA ===== */
.cta-section { padding: 64px 0; }
.cta-box { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 50%, var(--accent) 100%); border-radius: var(--radius-lg); padding: 64px 48px; text-align: center; position: relative; overflow: hidden; }
.cta-box::before { content: ''; position: absolute; inset: 0; background: url('/assets/images/backpic/back-3.png') center/cover no-repeat; opacity: .1; }
.cta-box h2 { font-size: 32px; font-weight: 800; color: #fff; margin-bottom: 12px; position: relative; z-index: 2; }
.cta-box p { font-size: 16px; color: rgba(255,255,255,.85); max-width: 560px; margin: 0 auto 28px; position: relative; z-index: 2; line-height: 1.8; }
.cta-btns { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; position: relative; z-index: 2; }
.btn-white { background: #fff; color: var(--primary-dark); border: none; box-shadow: 0 8px 24px rgba(0,0,0,.18); }
.btn-white:hover { transform: translateY(-3px); box-shadow: 0 12px 32px rgba(0,0,0,.24); color: var(--primary); }
.btn-ghost { background: rgba(255,255,255,.12); color: #fff; border: 1px solid rgba(255,255,255,.35); backdrop-filter: blur(8px); }
.btn-ghost:hover { background: rgba(255,255,255,.22); transform: translateY(-3px); }

/* ===== Footer ===== */
.site-footer { background: var(--dark); color: #94a3b8; padding: 64px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; padding-bottom: 48px; border-bottom: 1px solid rgba(255,255,255,.08); }
.footer-brand .footer-logo { display: inline-flex; align-items: center; gap: 10px; font-size: 18px; font-weight: 800; color: #fff; margin-bottom: 16px; }
.footer-brand p { font-size: 14px; line-height: 1.9; max-width: 360px; }
.footer-col h5 { color: #fff; font-size: 14px; font-weight: 700; margin-bottom: 18px; letter-spacing: .5px; }
.footer-col a { display: block; padding: 5px 0; font-size: 14px; color: #94a3b8; transition: var(--transition); }
.footer-col a:hover { color: var(--primary); padding-left: 6px; }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding: 20px 0; font-size: 13px; color: #64748b; flex-wrap: wrap; gap: 8px; }

/* ===== Quick Promo ===== */
.quick-promo { display: grid; grid-template-columns: 1.1fr 1fr; gap: 32px; align-items: center; }
.promo-content .badge { margin-bottom: 16px; }
.promo-content h2 { font-size: 30px; font-weight: 800; line-height: 1.3; margin-bottom: 16px; }
.promo-content p { font-size: 15px; color: var(--text-weak); line-height: 1.9; margin-bottom: 20px; }
.promo-list li { display: flex; align-items: center; gap: 12px; font-size: 14px; padding: 8px 0; color: var(--dark); }
.promo-list i { color: var(--accent); font-size: 16px; }
.promo-img { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg); }
.promo-img img { width: 100%; height: 320px; object-fit: cover; }

/* ===== Breadcrumb ===== */
.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-weak); margin-bottom: 28px; flex-wrap: wrap; padding: 12px 0; }
.breadcrumb a { color: var(--primary); }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb i { font-size: 10px; color: #94a3b8; }

/* ===== Related Categories ===== */
.rel-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.rel-card { background: var(--bg-card); border-radius: var(--radius-lg); border: 1px solid var(--border); overflow: hidden; transition: var(--transition); box-shadow: var(--shadow-sm); }
.rel-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.rel-card .rel-img { height: 180px; overflow: hidden; position: relative; }
.rel-card .rel-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.rel-card:hover .rel-img img { transform: scale(1.05); }
.rel-card .rel-img::after { content: ''; position: absolute; inset: 0; background: linear-gradient(to top, rgba(15,23,42,.2), transparent); }
.rel-card .rel-body { padding: 24px; }
.rel-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.rel-card p { font-size: 13px; color: var(--text-weak); line-height: 1.7; margin-bottom: 16px; }
.rel-link { font-size: 14px; font-weight: 600; color: var(--primary); display: inline-flex; align-items: center; gap: 6px; }
.rel-link i { font-size: 12px; transition: var(--transition); }
.rel-link:hover i { transform: translateX(4px); }

/* ===== Mobile Nav ===== */
@media (max-width: 1024px) {
  .nav-dock { flex-wrap: wrap; border-radius: 24px; }
  .main-nav { order: 3; width: 100%; flex-basis: 100%; justify-content: center; padding-top: 8px; border-top: 1px solid var(--border); margin-top: 4px; display: flex; gap: 6px; }
  .nav-search { order: 4; width: calc(100% - 52px); }
  .nav-cta { order: 5; }
  .nav-toggle { order: 6; display: inline-flex; }
  .main-nav a { font-size: 13px; padding: 8px 14px; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .page-hero h1 { font-size: 34px; }
  .section { --space-section: 64px; }

  /* Mobile nav collapsed */
  .main-nav.collapsed { display: none; }
  .main-nav.mobile-open { display: flex; flex-direction: column; align-items: stretch; gap: 6px; width: 100%; position: absolute; top: calc(100% + 12px); left: 0; background: #fff; border-radius: 16px; padding: 16px; box-shadow: var(--shadow-lg); border: 1px solid var(--border); }
  .main-nav.mobile-open a { padding: 12px 16px; text-align: center; border-radius: 10px; }
  .main-nav.collapsed + .nav-search { display: none; }
  .main-nav.mobile-open ~ .nav-search { display: none; }
}

@media (max-width: 768px) {
  .grid-3, .grid-2, .grid-feature, .quick-promo { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .stats-banner { padding: 40px 24px; }
  .content-item { flex-wrap: wrap; }
  .page-hero { padding: 72px 0 56px; }
  .page-hero h1 { font-size: 28px; }
  .rel-cards { grid-template-columns: 1fr; }
  .section-title { font-size: 26px; }
  .cta-box { padding: 48px 24px; }
  .cta-box h2 { font-size: 26px; }
  .hero-meta { flex-direction: column; align-items: flex-start; }
  .grid-4 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
}

@media (max-width: 520px) {
  .container { padding: 0 16px; }
  body { font-size: 15px; }
  .nav-dock { padding: 10px 14px; border-radius: 18px; }
  .logo { font-size: 15px; gap: 8px; }
  .logo .logo-icon { width: 32px; height: 32px; font-size: 14px; }
  .page-hero h1 { font-size: 24px; }
  .hero-meta .btn { width: 100%; text-align: center; }
  .section-title { font-size: 24px; }
  .stats-grid { grid-template-columns: 1fr; }
  .stat-number { font-size: 32px; }
  .faq-q { font-size: 14px; padding: 16px 18px; }
  .faq-a { padding: 0 18px 18px; }
  .section { --space-section: 56px; }
  .cta-btns .btn { width: 100%; }
  .content-item { flex-direction: column; text-align: center; }
  .promo-img img { height: 220px; }
}

/* roulang page: category2 */
/* ============ 设计变量 ============ */
        :root {
            --primary: #2563eb;
            --primary-dark: #1e40af;
            --primary-light: #60a5fa;
            --accent: #f59e0b;
            --dark: #0f172a;
            --bg: #f8fafc;
            --bg-white: #ffffff;
            --text: #1e293b;
            --text-light: #64748b;
            --border: #e2e8f0;
            --radius-lg: 24px;
            --radius-md: 16px;
            --radius-sm: 12px;
            --shadow-sm: 0 2px 12px rgba(15, 23, 42, .05);
            --shadow-md: 0 6px 24px rgba(15, 23, 42, .08);
            --shadow-lg: 0 16px 48px rgba(15, 23, 42, .12);
            --transition: all .3s cubic-bezier(.4, 0, .2, 1);
            --container: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
        }

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

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

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

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

        input {
            font-family: inherit;
            font-size: inherit;
        }

        ul,
        ol {
            list-style: none;
        }

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

        /* ============ 按钮 ============ */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 11px 24px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 600;
            transition: var(--transition);
            border: 2px solid transparent;
            line-height: 1.4;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(37, 99, 235, .25);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(37, 99, 235, .35);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(37, 99, 235, .3);
        }

        .btn-primary:focus-visible {
            outline: 3px solid rgba(37, 99, 235, .35);
            outline-offset: 2px;
        }

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

        .btn-outline:hover {
            background: rgba(37, 99, 235, .08);
            transform: translateY(-2px);
        }

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

        .btn-outline:focus-visible {
            outline: 3px solid rgba(37, 99, 235, .25);
            outline-offset: 2px;
        }

        .btn-light {
            background: rgba(255, 255, 255, .16);
            color: #fff;
            border-color: rgba(255, 255, 255, .45);
            backdrop-filter: blur(8px);
        }

        .btn-light:hover {
            background: rgba(255, 255, 255, .26);
            transform: translateY(-2px);
        }

        /* ============ 浮动 Dock 导航 ============ */
        .site-header {
            position: fixed;
            top: 14px;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 0 24px;
        }

        .nav-dock {
            max-width: var(--container);
            margin: 0 auto;
            display: flex;
            align-items: center;
            gap: 14px;
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid rgba(226, 232, 240, .85);
            border-radius: 999px;
            padding: 10px 18px;
            box-shadow: 0 8px 32px rgba(15, 23, 42, .08);
            transition: box-shadow .3s ease;
        }

        .nav-dock:hover {
            box-shadow: 0 12px 40px rgba(15, 23, 42, .1);
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 16px;
            color: var(--text);
            white-space: nowrap;
            letter-spacing: .2px;
            flex-shrink: 0;
            transition: color .3s ease;
        }

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

        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
            flex-shrink: 0;
            box-shadow: 0 4px 14px rgba(37, 99, 235, .3);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            flex: 1;
            justify-content: center;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }

        .main-nav::-webkit-scrollbar {
            display: none;
        }

        .main-nav a {
            padding: 8px 16px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-light);
            transition: var(--transition);
            white-space: nowrap;
        }

        .main-nav a:hover {
            color: var(--primary);
            background: rgba(37, 99, 235, .08);
        }

        .main-nav a:focus-visible {
            outline: 3px solid rgba(37, 99, 235, .25);
            outline-offset: 2px;
        }

        .main-nav a.active {
            color: #fff;
            background: var(--primary);
            font-weight: 600;
            box-shadow: 0 4px 14px rgba(37, 99, 235, .3);
        }

        .nav-search {
            display: flex;
            align-items: center;
            background: var(--bg);
            border-radius: 999px;
            padding: 3px 3px 3px 16px;
            border: 1px solid var(--border);
            transition: var(--transition);
            flex-shrink: 0;
        }

        .nav-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, .12);
        }

        .nav-search input {
            border: none;
            background: transparent;
            outline: none;
            font-size: 13px;
            width: 110px;
            color: var(--text);
            transition: width .3s ease;
        }

        .nav-search input:focus {
            width: 150px;
        }

        .nav-search input::placeholder {
            color: #94a3b8;
        }

        .nav-search button {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
            flex-shrink: 0;
        }

        .nav-search button:hover {
            background: var(--primary-dark);
        }

        .nav-search button:focus-visible {
            outline: 3px solid rgba(37, 99, 235, .3);
        }

        .nav-cta {
            flex-shrink: 0;
            padding: 9px 22px;
            font-size: 14px;
        }

        .nav-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: var(--bg);
            color: var(--text);
            font-size: 16px;
            align-items: center;
            justify-content: center;
            border: 1px solid var(--border);
            transition: var(--transition);
            flex-shrink: 0;
        }

        .nav-toggle:hover {
            background: rgba(37, 99, 235, .08);
            color: var(--primary);
        }

        .nav-toggle:focus-visible {
            outline: 3px solid rgba(37, 99, 235, .25);
        }

        /* ============ 页面 Hero / Banner ============ */
        .page-hero {
            padding: 170px 0 110px;
            background-size: cover;
            background-position: center;
            position: relative;
            border-radius: 0;
        }

        .page-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(105deg, rgba(15, 23, 42, .85) 30%, rgba(15, 23, 42, .45) 70%, rgba(15, 23, 42, .2) 100%);
        }

        .page-hero .container {
            position: relative;
            z-index: 1;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            color: rgba(255, 255, 255, .75);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            transition: color .3s ease;
        }

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

        .breadcrumb i {
            font-size: 10px;
            color: rgba(255, 255, 255, .4);
        }

        .page-hero h1 {
            font-size: 40px;
            font-weight: 800;
            color: #fff;
            line-height: 1.3;
            max-width: 720px;
            margin-bottom: 18px;
            letter-spacing: -.5px;
        }

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

        .page-hero .hero-desc {
            font-size: 16px;
            color: rgba(255, 255, 255, .85);
            max-width: 620px;
            margin-bottom: 32px;
            line-height: 1.8;
        }

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

        .hero-badge {
            display: inline-block;
            background: rgba(255, 255, 255, .14);
            border: 1px solid rgba(255, 255, 255, .25);
            backdrop-filter: blur(8px);
            color: #fff;
            font-size: 13px;
            padding: 7px 18px;
            border-radius: 999px;
            margin-bottom: 20px;
            font-weight: 500;
        }

        .hero-badge i {
            color: var(--accent);
            margin-right: 6px;
        }

        /* ============ 数据统计 ============ */
        .stats-section {
            padding: 70px 0;
            background: var(--bg);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .stat-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            text-align: center;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .stat-card::after {
            content: "";
            position: absolute;
            left: 0;
            right: 0;
            bottom: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--primary-light));
            transform: scaleX(0);
            transform-origin: left;
            transition: transform .4s ease;
        }

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

        .stat-card:hover::after {
            transform: scaleX(1);
        }

        .stat-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: rgba(37, 99, 235, .1);
            color: var(--primary);
            font-size: 22px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
        }

        .stat-num {
            font-size: 32px;
            font-weight: 800;
            color: var(--text);
            line-height: 1.2;
            letter-spacing: -1px;
        }

        .stat-label {
            font-size: 13px;
            color: var(--text-light);
            margin-top: 6px;
        }

        /* ============ 板块标题 ============ */
        .section-head {
            text-align: center;
            max-width: 640px;
            margin: 0 auto 48px;
        }

        .section-tag {
            display: inline-block;
            background: rgba(37, 99, 235, .1);
            color: var(--primary);
            font-size: 13px;
            font-weight: 700;
            padding: 6px 18px;
            border-radius: 999px;
            margin-bottom: 16px;
            letter-spacing: .5px;
        }

        .section-head h2 {
            font-size: 32px;
            font-weight: 800;
            color: var(--text);
            line-height: 1.35;
            margin-bottom: 14px;
            letter-spacing: -.5px;
        }

        .section-head p {
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.8;
        }

        /* ============ 核心防护功能 ============ */
        .features-section {
            padding: 70px 0;
            background: var(--bg-white);
        }

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

        .feature-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(37, 99, 235, .2);
        }

        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            background: linear-gradient(135deg, rgba(37, 99, 235, .12), rgba(96, 165, 250, .12));
            color: var(--primary);
            font-size: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            transition: var(--transition);
        }

        .feature-card:hover .feature-icon {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            transform: rotate(-6deg) scale(1.05);
        }

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

        .feature-card p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.75;
        }

        /* ============ 安全防护流程 ============ */
        .process-section {
            padding: 70px 0;
            background: var(--bg);
            position: relative;
            overflow: hidden;
        }

        .process-section::before {
            content: "";
            position: absolute;
            top: 0;
            right: 0;
            width: 320px;
            height: 320px;
            background: radial-gradient(circle, rgba(37, 99, 235, .06), transparent 70%);
            border-radius: 50%;
        }

        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
            z-index: 1;
        }

        .process-step {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            position: relative;
            text-align: left;
        }

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

        .step-num {
            font-size: 44px;
            font-weight: 800;
            color: transparent;
            -webkit-text-stroke: 2px rgba(37, 99, 235, .4);
            line-height: 1;
            margin-bottom: 18px;
            font-family: 'Georgia', serif;
            transition: all .3s ease;
        }

        .process-step:hover .step-num {
            -webkit-text-stroke-color: var(--primary);
            color: rgba(37, 99, 235, .08);
        }

        .process-step h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 10px;
        }

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

        .process-step::after {
            content: "";
            position: absolute;
            top: 50%;
            right: -12px;
            width: 24px;
            height: 24px;
            background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%232563eb' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M9 6l6 6-6 6'/%3E%3C/svg%3E") no-repeat center/contain;
            opacity: .6;
        }

        .process-step:last-child::after {
            display: none;
        }

        /* ============ 安全技巧文章 ============ */
        .articles-section {
            padding: 70px 0;
            background: var(--bg-white);
        }

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

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

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

        .article-cover {
            position: relative;
            overflow: hidden;
            height: 200px;
            flex-shrink: 0;
        }

        .article-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }

        .article-card:hover .article-cover img {
            transform: scale(1.06);
        }

        .article-cover::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 60%, rgba(15, 23, 42, .4));
        }

        .article-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(8px);
            color: var(--primary);
            font-size: 12px;
            font-weight: 700;
            padding: 5px 14px;
            border-radius: 999px;
            box-shadow: var(--shadow-sm);
        }

        .article-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .article-body h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text);
            line-height: 1.5;
            margin-bottom: 10px;
            transition: color .3s ease;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

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

        .article-body p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 16px;
            flex: 1;
        }

        .article-meta {
            display: flex;
            gap: 16px;
            font-size: 13px;
            color: #94a3b8;
            border-top: 1px solid var(--border);
            padding-top: 14px;
        }

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

        .article-meta i {
            font-size: 12px;
        }

        /* ============ FAQ ============ */
        .faq-section {
            padding: 70px 0;
            background: var(--bg);
        }

        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

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

        .faq-item:hover {
            border-color: rgba(37, 99, 235, .2);
        }

        .faq-item.active {
            border-color: var(--primary);
            box-shadow: 0 6px 24px rgba(37, 99, 235, .1);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            text-align: left;
            transition: color .3s ease;
            background: none;
        }

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

        .faq-question:focus-visible {
            outline: 3px solid rgba(37, 99, 235, .25);
            outline-offset: -2px;
        }

        .faq-question i {
            font-size: 13px;
            color: var(--text-light);
            transition: transform .3s ease;
            flex-shrink: 0;
        }

        .faq-item.active .faq-question {
            color: var(--primary);
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .4s ease, padding .3s ease;
            padding: 0 24px;
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.75;
            border-top: 1px solid transparent;
        }

        .faq-item.active .faq-answer {
            padding: 0 24px 20px;
            border-top-color: var(--border);
        }

        .faq-more {
            text-align: center;
            margin-top: 36px;
        }

        .faq-more a {
            color: var(--primary);
            font-weight: 600;
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: 999px;
            background: rgba(37, 99, 235, .06);
            transition: var(--transition);
        }

        .faq-more a:hover {
            background: rgba(37, 99, 235, .12);
            transform: translateY(-2px);
        }

        /* ============ CTA ============ */
        .cta-section {
            padding: 70px 0 90px;
            background: var(--bg-white);
        }

        .cta-box {
            background: linear-gradient(135deg, var(--dark) 0%, #1e3a5f 60%, #2563eb 130%);
            border-radius: var(--radius-lg);
            padding: 60px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .cta-box::before {
            content: "";
            position: absolute;
            top: -60px;
            right: -60px;
            width: 220px;
            height: 220px;
            background: radial-gradient(circle, rgba(255, 255, 255, .12), transparent 70%);
            border-radius: 50%;
        }

        .cta-box::after {
            content: "";
            position: absolute;
            bottom: -80px;
            left: -40px;
            width: 260px;
            height: 260px;
            background: radial-gradient(circle, rgba(96, 165, 250, .16), transparent 70%);
            border-radius: 50%;
        }

        .cta-box h2 {
            font-size: 30px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: -.5px;
            position: relative;
            z-index: 1;
        }

        .cta-box p {
            font-size: 15px;
            color: rgba(255, 255, 255, .75);
            max-width: 520px;
            margin: 0 auto 32px;
            line-height: 1.8;
            position: relative;
            z-index: 1;
        }

        .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }

        .cta-buttons .btn-outline {
            color: #fff;
            border-color: rgba(255, 255, 255, .5);
        }

        .cta-buttons .btn-outline:hover {
            background: rgba(255, 255, 255, .15);
            border-color: #fff;
        }

        /* ============ 页脚 ============ */
        .site-footer {
            background: var(--dark);
            color: rgba(255, 255, 255, .65);
            padding: 64px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }

        .footer-brand .footer-logo {
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }

        .footer-brand .footer-logo i {
            color: var(--primary-light);
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            max-width: 340px;
        }

        .footer-col h5 {
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 20px;
            letter-spacing: .3px;
        }

        .footer-col a {
            display: block;
            font-size: 14px;
            padding: 6px 0;
            color: rgba(255, 255, 255, .55);
            transition: var(--transition);
        }

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

        .footer-col a:focus-visible {
            outline: 2px solid rgba(255, 255, 255, .3);
            border-radius: 4px;
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 24px 0 28px;
            font-size: 13px;
            color: rgba(255, 255, 255, .4);
            flex-wrap: wrap;
            gap: 12px;
        }

        /* ============ 响应式断点 ============ */
        @media (max-width: 1024px) {
            .nav-dock {
                padding: 10px 14px;
                gap: 10px;
            }

            .main-nav a {
                padding: 8px 12px;
                font-size: 13px;
            }

            .logo {
                font-size: 14px;
            }

            .nav-search input {
                width: 90px;
            }

            .nav-search input:focus {
                width: 110px;
            }

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

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

            .process-step::after {
                display: none;
            }

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

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

        @media (max-width: 768px) {
            .site-header {
                top: 10px;
                padding: 0 16px;
            }

            .nav-dock {
                flex-wrap: wrap;
                border-radius: 20px;
                padding: 12px 16px;
            }

            .logo {
                font-size: 14px;
                gap: 8px;
            }

            .logo-icon {
                width: 34px;
                height: 34px;
                font-size: 14px;
                border-radius: 10px;
            }

            .nav-toggle {
                display: flex;
                margin-left: auto;
            }

            .main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                padding: 12px 0 4px;
                border-top: 1px solid var(--border);
                margin-top: 8px;
                order: 4;
                flex: none;
            }

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

            .nav-search {
                display: none;
                width: 100%;
                order: 5;
                margin-top: 6px;
            }

            .nav-search input {
                width: 100%;
                flex: 1;
            }

            .nav-search input:focus {
                width: auto;
            }

            .nav-cta {
                display: none;
                order: 6;
                width: 100%;
                margin-top: 8px;
                justify-content: center;
            }

            .nav-dock.menu-open .main-nav,
            .nav-dock.menu-open .nav-search,
            .nav-dock.menu-open .nav-cta {
                display: flex;
            }

            .page-hero {
                padding: 140px 0 80px;
            }

            .page-hero h1 {
                font-size: 30px;
            }

            .page-hero .hero-desc {
                font-size: 15px;
            }

            .section-head h2 {
                font-size: 26px;
            }

            .stats-grid,
            .features-grid,
            .article-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

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

            .stats-section,
            .features-section,
            .process-section,
            .articles-section,
            .faq-section,
            .cta-section {
                padding: 52px 0;
            }

            .cta-box {
                padding: 44px 24px;
                border-radius: var(--radius-md);
            }

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

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

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

        @media (max-width: 520px) {
            .site-header {
                top: 8px;
                padding: 0 12px;
            }

            .nav-dock {
                border-radius: 16px;
                padding: 10px 14px;
            }

            .logo {
                font-size: 13px;
            }

            .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 12px;
            }

            .page-hero {
                padding: 130px 0 70px;
            }

            .page-hero h1 {
                font-size: 24px;
                line-height: 1.35;
            }

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

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

            .section-head {
                margin-bottom: 32px;
            }

            .section-head h2 {
                font-size: 22px;
            }

            .stat-card {
                padding: 20px 16px;
            }

            .stat-num {
                font-size: 26px;
            }

            .feature-card {
                padding: 24px 20px;
            }

            .cta-buttons {
                flex-direction: column;
            }

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

            .faq-question {
                font-size: 14px;
                padding: 18px 20px;
            }

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

            .article-cover {
                height: 170px;
            }

            .article-body {
                padding: 20px;
            }

            .footer-col a {
                font-size: 13px;
            }
        }