/* roulang page: index */
/* ===== 设计变量 ===== */
:root {
  --primary: #5B8DB8;
  --primary-dark: #3E6E99;
  --primary-light: #EDF4FA;
  --accent: #A98568;
  --accent-light: #F5EDE6;
  --bg: #F8FAFC;
  --bg-white: #FFFFFF;
  --text: #243040;
  --text-secondary: #5C6B7A;
  --text-muted: #A6B2BF;
  --border: #E7EDF3;
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 8px;
  --shadow-sm: 0 2px 8px rgba(36,48,64,.06);
  --shadow-md: 0 6px 16px rgba(36,48,64,.08);
  --shadow-hover: 0 12px 28px rgba(36,48,64,.12);
  --container: 1200px;
  --spacing-section: 96px;
  --spacing-section-mobile: 64px;
  --transition: .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", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-dark); }
ul, ol { list-style: none; }
button { font-family: inherit; border: none; cursor: pointer; background: none; }
input, select, textarea { font-family: inherit; font-size: 14px; }

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

section { padding: var(--spacing-section) 0; }

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 56px;
}

.section-header .section-badge {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary-dark);
  font-size: 13px;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 20px;
  letter-spacing: .5px;
  margin-bottom: 14px;
}

.section-header h2 {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text);
  margin-bottom: 12px;
}

.section-header p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  transition: all var(--transition);
  cursor: pointer;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(91,141,184,.25);
}
.btn-primary:hover {
  background: var(--primary-dark);
  color: #fff;
  box-shadow: 0 6px 18px rgba(62,110,153,.3);
}
.btn-primary:active { transform: scale(.98); }
.btn-primary:focus-visible {
  outline: 2px solid rgba(91,141,184,.5);
  outline-offset: 2px;
}

.btn-secondary {
  background: #fff;
  border-color: #D6DEE6;
  color: var(--text);
}
.btn-secondary:hover {
  background: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary-dark);
}
.btn-secondary:focus-visible {
  outline: 2px solid rgba(91,141,184,.4);
  outline-offset: 2px;
}

.btn-lg { padding: 16px 40px; font-size: 16px; }

/* ===== Header ===== */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow var(--transition);
}

.site-header.scrolled {
  box-shadow: 0 4px 20px rgba(36,48,64,.08);
}

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

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

.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 18px;
  flex-shrink: 0;
}

.logo-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.2;
  white-space: nowrap;
}

.logo-text span {
  font-size: 13px;
  font-weight: 400;
  color: var(--text-secondary);
  margin-left: 4px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
  justify-content: center;
}

.main-nav a {
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition);
  white-space: nowrap;
}

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

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

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

.header-search {
  display: flex;
  align-items: center;
  background: #F1F5F9;
  border-radius: 20px;
  padding: 0 14px;
  height: 38px;
  border: 1px solid transparent;
  transition: all var(--transition);
}

.header-search:focus-within {
  background: #fff;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(91,141,184,.12);
}

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

.header-search input {
  border: none;
  background: transparent;
  outline: none;
  width: 140px;
  font-size: 13px;
  color: var(--text);
}

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

.header-login {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 6px 10px;
  border-radius: 8px;
  transition: all var(--transition);
  white-space: nowrap;
}

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

.header-btn {
  padding: 9px 20px;
  font-size: 14px;
  border-radius: 20px;
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition);
  white-space: nowrap;
}

.header-btn:hover {
  background: var(--primary-dark);
  color: #fff;
  box-shadow: 0 4px 14px rgba(91,141,184,.3);
}

.mobile-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--text);
  transition: background var(--transition);
}

.mobile-toggle:hover { background: var(--primary-light); }

/* ===== Hero（资源下载站风格） ===== */
.hero {
  position: relative;
  padding: 180px 0 80px;
  background: url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
  text-align: center;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(248,250,252,.92) 0%, rgba(248,250,252,.82) 50%, rgba(248,250,252,.95) 100%);
}

.hero-inner {
  position: relative;
  z-index: 2;
  max-width: 820px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,.9);
  border: 1px solid var(--border);
  color: var(--primary-dark);
  padding: 6px 18px;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}

.hero-title {
  font-size: 42px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text);
  margin-bottom: 18px;
}

.hero-title em {
  font-style: normal;
  color: var(--primary);
}

.hero-subtitle {
  font-size: 18px;
  color: var(--text-secondary);
  line-height: 1.8;
  max-width: 640px;
  margin: 0 auto 36px;
}

.hero-search-wrap {
  max-width: 580px;
  margin: 0 auto 28px;
}

.hero-search {
  display: flex;
  align-items: center;
  background: #fff;
  border-radius: 40px;
  padding: 6px 6px 6px 20px;
  box-shadow: 0 4px 24px rgba(36,48,64,.08);
  border: 1px solid var(--border);
  transition: all var(--transition);
}

.hero-search:focus-within {
  box-shadow: 0 6px 30px rgba(91,141,184,.18);
  border-color: var(--primary);
}

.hero-search i {
  color: var(--text-muted);
  font-size: 16px;
  margin-right: 12px;
}

.hero-search input {
  flex: 1;
  border: none;
  outline: none;
  font-size: 15px;
  color: var(--text);
  background: transparent;
  height: 44px;
}

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

.hero-search button {
  background: var(--primary);
  color: #fff;
  border-radius: 32px;
  padding: 10px 26px;
  font-size: 14px;
  font-weight: 600;
  transition: all var(--transition);
  white-space: nowrap;
  height: 44px;
  display: flex;
  align-items: center;
  gap: 6px;
}

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

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-bottom: 28px;
}

.hero-tags span {
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.hero-tags a {
  font-size: 13px;
  color: var(--text-secondary);
  background: rgba(255,255,255,.85);
  border: 1px solid var(--border);
  padding: 5px 14px;
  border-radius: 18px;
  transition: all var(--transition);
}

.hero-tags a:hover {
  background: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary-dark);
}

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

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
}

.hero-stat {
  background: rgba(255,255,255,.85);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 14px 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(6px);
  min-width: 120px;
}

.hero-stat .num {
  font-size: 26px;
  font-weight: 700;
  color: var(--primary-dark);
  line-height: 1.2;
}

.hero-stat .label {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 2px;
}

/* ===== 卖点三连 ===== */
.features {
  background: var(--bg-white);
}

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

.feature-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0;
  transition: opacity var(--transition);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: transparent;
}

.feature-card:hover::before { opacity: 1; }

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--primary-light);
  color: var(--primary-dark);
  font-size: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.feature-card:nth-child(2) .feature-icon {
  background: var(--accent-light);
  color: var(--accent);
}

.feature-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text);
}

.feature-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 16px;
}

.feature-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.feature-tags a {
  font-size: 12px;
  color: var(--primary-dark);
  background: var(--primary-light);
  padding: 4px 12px;
  border-radius: 12px;
  transition: all var(--transition);
}

.feature-tags a:hover {
  background: var(--primary-dark);
  color: #fff;
}

/* ===== 数据指标 ===== */
.metrics-section {
  background: var(--bg);
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 20px;
}

.metric-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 18px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}

.metric-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.metric-card .num {
  font-size: 30px;
  font-weight: 700;
  color: var(--primary-dark);
  line-height: 1.2;
}

.metric-card .label {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 6px;
}

/* ===== 场景演示 ===== */
.scene-section {
  background: var(--bg-white);
}

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

.scene-image {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-hover);
  height: 420px;
}

.scene-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.scene-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(36,48,64,.15) 100%);
}

.scene-content h3 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 16px;
  line-height: 1.4;
}

.scene-content > p {
  color: var(--text-secondary);
  font-size: 15px;
  margin-bottom: 28px;
}

.scene-steps {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.scene-step {
  display: flex;
  gap: 16px;
  padding: 14px 18px;
  border-radius: var(--radius-md);
  background: var(--bg);
  border: 1px solid var(--border);
  transition: all var(--transition);
}

.scene-step:hover {
  background: var(--primary-light);
  border-color: rgba(91,141,184,.4);
}

.scene-step .step-num {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 2px;
}

.scene-step h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 2px;
}

.scene-step p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===== 社会认同 ===== */
.testi-section {
  background: var(--bg);
}

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

.testi-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}

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

.testi-stars {
  color: #E8B34B;
  font-size: 14px;
  letter-spacing: 2px;
  margin-bottom: 14px;
}

.testi-card p {
  font-size: 15px;
  color: var(--text);
  line-height: 1.8;
  font-style: normal;
  margin-bottom: 18px;
}

.testi-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.testi-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 700;
}

.testi-author .name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

.testi-author .role {
  font-size: 12px;
  color: var(--text-muted);
}

/* ===== 资讯区 ===== */
.news-section {
  background: var(--bg-white);
}

.news-wrap {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 40px;
  align-items: start;
}

.news-list {
  display: flex;
  flex-direction: column;
}

.news-item {
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
  transition: padding var(--transition);
}

.news-item:first-child { padding-top: 0; }
.news-item:last-child { border-bottom: none; }

.news-item a {
  display: block;
}

.news-item .title {
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
  transition: color var(--transition);
  line-height: 1.5;
}

.news-item:hover .title {
  color: var(--primary-dark);
}

.news-item .meta {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 6px;
  display: flex;
  gap: 12px;
}

.news-item .meta i {
  margin-right: 4px;
}

.news-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 26px;
  transition: all var(--transition);
}

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

.sidebar-card .card-label {
  font-size: 12px;
  color: var(--primary-dark);
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.sidebar-card h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
  line-height: 1.5;
}

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

.sidebar-card a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  margin-top: 12px;
  color: var(--primary);
}

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

.sidebar-card a i {
  transition: transform var(--transition);
}

.sidebar-card a:hover i {
  transform: translateX(4px);
}

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

.faq-wrap {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: box-shadow var(--transition);
}

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

.faq-q {
  padding: 20px 24px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  transition: color var(--transition);
  user-select: none;
}

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

.faq-q .icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-dark);
  font-size: 12px;
  transition: all .3s ease;
  flex-shrink: 0;
  margin-left: 16px;
}

.faq-item.active .faq-q .icon {
  transform: rotate(45deg);
  background: var(--primary-dark);
  color: #fff;
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease, padding .35s ease;
  padding: 0 24px;
}

.faq-item.active .faq-a {
  max-height: 400px;
  padding: 0 24px 20px;
}

.faq-a p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
  border-top: 1px solid var(--border);
  padding-top: 14px;
}

/* ===== 转化表单 ===== */
.cta-section {
  background: linear-gradient(180deg, var(--primary-light) 0%, #F0F6FB 100%);
}

.cta-inner {
  max-width: 640px;
  margin: 0 auto;
}

.form-card {
  background: #fff;
  border-radius: 20px;
  box-shadow: 0 12px 40px rgba(36,48,64,.1);
  padding: 40px;
}

.form-card h3 {
  font-size: 26px;
  font-weight: 700;
  text-align: center;
  color: var(--text);
  margin-bottom: 8px;
}

.form-card .form-desc {
  text-align: center;
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 30px;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group.full {
  grid-column: 1 / -1;
}

.form-group label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
}

.form-group label .req {
  color: #D9534F;
  margin-left: 2px;
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: #F4F7FA;
  font-size: 14px;
  color: var(--text);
  outline: none;
  transition: all var(--transition);
  width: 100%;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  background: #fff;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(91,141,184,.12);
}

.form-group textarea {
  resize: vertical;
  min-height: 80px;
}

.form-submit {
  width: 100%;
  margin-top: 22px;
  justify-content: center;
  padding: 15px;
  font-size: 16px;
}

.form-privacy {
  text-align: center;
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 16px;
  line-height: 1.6;
}

/* ===== Footer ===== */
.site-footer {
  background: #1E2A38;
  color: #A6B2BF;
  padding: 64px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 48px;
}

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

.footer-brand .logo-text span {
  color: #8FA0B0;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  color: #A6B2BF;
  margin-top: 16px;
}

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

.footer-col ul li {
  margin-bottom: 8px;
}

.footer-col ul a {
  font-size: 14px;
  color: #A6B2BF;
  transition: color var(--transition);
}

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

.footer-contact li {
  display: flex;
  gap: 10px;
  font-size: 14px;
  color: #A6B2BF;
  margin-bottom: 10px;
}

.footer-contact i {
  color: var(--primary);
  width: 16px;
  padding-top: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding-top: 24px;
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: #7A8EA0;
}

/* ===== 返回顶部 ===== */
.back-top {
  position: fixed;
  bottom: 40px;
  right: 24px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(91,141,184,.35);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
  z-index: 90;
}

.back-top.show {
  opacity: 1;
  visibility: visible;
}

.back-top:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .metrics-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .main-nav { display: none; }
  .mobile-toggle { display: flex; }
  .header-search { display: none; }
  .header-login { display: none; }

  .header-wrap {
    height: 64px;
  }

  .mobile-menu {
    display: block;
    position: fixed;
    top: 64px;
    left: 0; right: 0;
    background: #fff;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    padding: 16px 24px 24px;
    z-index: 99;
    transform: translateY(-120%);
    transition: transform .3s ease;
  }

  .mobile-menu.open {
    transform: translateY(0);
  }

  .mobile-menu nav {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-bottom: 16px;
  }

  .mobile-menu nav a {
    padding: 12px 14px;
    border-radius: var(--radius-md);
    font-size: 15px;
    color: var(--text-secondary);
    font-weight: 500;
    transition: all var(--transition);
  }

  .mobile-menu nav a:hover,
  .mobile-menu nav a.active {
    background: var(--primary-light);
    color: var(--primary-dark);
  }

  .mobile-menu .mobile-search {
    display: flex;
    align-items: center;
    background: #F1F5F9;
    border-radius: 20px;
    padding: 0 14px;
    height: 42px;
    border: 1px solid transparent;
    margin-bottom: 12px;
  }

  .mobile-menu .mobile-search i {
    color: var(--text-muted);
    margin-right: 8px;
  }

  .mobile-menu .mobile-search input {
    border: none;
    background: transparent;
    outline: none;
    flex: 1;
    font-size: 14px;
    color: var(--text);
  }

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

  .mobile-menu .mobile-actions .btn { flex: 1; justify-content: center; }
  .mobile-menu .mobile-actions .btn-login {
    background: var(--bg);
    border: 1px solid var(--border);
    color: var(--text);
  }
}

@media (max-width: 768px) {
  :root {
    --spacing-section: 64px;
  }

  .container {
    padding: 0 16px;
  }

  .hero {
    padding: 140px 0 60px;
  }

  .hero-title {
    font-size: 28px;
    line-height: 1.4;
  }

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

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

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

  .hero-stats {
    gap: 12px;
  }

  .hero-stat {
    padding: 10px 16px;
    min-width: 100px;
  }

  .hero-stat .num {
    font-size: 22px;
  }

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

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

  .scene-image {
    height: 280px;
  }

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

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

  .form-card {
    padding: 28px 20px;
  }

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

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

@media (max-width: 520px) {
  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
  }

  .metric-card {
    padding: 20px 12px;
  }

  .metric-card .num {
    font-size: 24px;
  }

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .hero-stat {
    min-width: calc(50% - 10px);
    flex: 1;
  }

  .hero-stats {
    gap: 10px;
  }

  .back-top {
    bottom: 20px;
    right: 16px;
    width: 38px;
    height: 38px;
    font-size: 14px;
  }
}

/* 移动端下拉菜单初始样式（隐藏） */
.mobile-menu {
  display: none;
}

@media (max-width: 1024px) {
  .mobile-menu {
    display: block;
    transform: translateY(-120%);
  }
  .mobile-menu.open {
    transform: translateY(0);
  }
}

/* roulang page: category1 */
/* ========== 设计变量 ========== */
:root {
  --primary: #5B8DB8;
  --primary-dark: #3E6E99;
  --accent: #A98568;
  --accent-gold: #C4A67D;
  --bg: #F8FAFC;
  --bg-white: #FFFFFF;
  --bg-light: #EDF4FA;
  --text: #243040;
  --text-secondary: #5C6B7A;
  --muted: #A6B2BF;
  --border: #E7EDF3;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-xs: 8px;
  --shadow: 0 2px 8px rgba(36,48,64,.06);
  --shadow-lg: 0 12px 28px rgba(36,48,64,.12);
  --container: 1200px;
  --space: 96px;
  --space-mobile: 64px;
}

/* ========== Reset / Base ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  font-size: 16px; line-height: 1.8; color: var(--text);
  background: var(--bg); -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: var(--primary); transition: color .2s ease; }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; display: block; }
button, input, select, textarea { font-family: inherit; font-size: inherit; border: none; outline: none; }
ul, ol { list-style: none; }
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

/* ========== 按钮 ========== */
.btn-primary {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  background: var(--primary); color: #fff; border-radius: var(--radius-xs);
  padding: 12px 28px; font-weight: 600; font-size: 15px; line-height: 1.4;
  cursor: pointer; transition: background .25s, transform .15s, box-shadow .25s; border: none;
}
.btn-primary:hover { background: var(--primary-dark); color: #fff; box-shadow: var(--shadow); }
.btn-primary:active { transform: scale(.98); }
.btn-primary:focus-visible { outline: 2px solid var(--primary); outline-offset: 3px; }
.btn-sm { padding: 9px 20px; font-size: 14px; }
.btn-lg { padding: 15px 38px; font-size: 16px; border-radius: var(--radius-sm); }
.btn-secondary {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  background: #fff; color: var(--text); border: 1px solid #D6DEE6;
  border-radius: var(--radius-xs); padding: 11px 26px; font-weight: 500; font-size: 15px;
  cursor: pointer; transition: background .25s, border-color .25s, color .25s;
}
.btn-secondary:hover { background: var(--bg-light); border-color: var(--primary); color: var(--primary-dark); }
.btn-secondary:active { transform: scale(.98); }

/* ========== Header / Nav ========== */
.site-header {
  position: sticky; top: 0; z-index: 1000;
  background: rgba(255,255,255,.93);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 76px; gap: 20px; }
.logo { display: inline-flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-icon {
  width: 38px; height: 38px; display: flex; align-items: center; justify-content: center;
  background: var(--bg-light); color: var(--primary); border-radius: 10px;
  font-size: 19px; border: 1px solid var(--border);
}
.logo-text { font-size: 20px; font-weight: 700; color: var(--text); letter-spacing: .5px; line-height: 1.2; }
.logo-text span { font-size: 13px; font-weight: 400; color: var(--text-secondary); margin-left: 2px; }
.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a {
  position: relative; padding: 8px 18px; font-size: 15px; font-weight: 500; color: var(--text);
  border-radius: 20px; transition: background .25s, color .25s; white-space: nowrap;
}
.main-nav a:hover { background: var(--bg-light); color: var(--primary-dark); }
.main-nav a.active { color: var(--primary); font-weight: 600; background: var(--bg-light); }
.main-nav a.active::after {
  content: ''; position: absolute; left: 18px; right: 18px; bottom: 3px; height: 2px;
  background: var(--primary); border-radius: 2px;
}
.header-actions { display: flex; align-items: center; gap: 14px; flex-shrink: 0; }
.search-box {
  display: flex; align-items: center; gap: 8px; background: var(--bg);
  border: 1px solid var(--border); border-radius: 20px; padding: 8px 16px; width: 200px;
  transition: border-color .25s, background .25s;
}
.search-box:focus-within { border-color: var(--primary); background: #fff; box-shadow: 0 0 0 3px rgba(91,141,184,.15); }
.search-box i { color: var(--muted); font-size: 14px; }
.search-box input { border: none; background: transparent; width: 100%; font-size: 14px; color: var(--text); }
.search-box input::placeholder { color: var(--muted); }
.btn-login {
  color: var(--text-secondary); font-size: 14px; font-weight: 500; padding: 6px 10px;
  border-radius: 8px; transition: color .2s, background .2s;
}
.btn-login:hover { color: var(--primary-dark); background: var(--bg-light); }
.nav-toggle {
  display: none; width: 42px; height: 42px; border-radius: 10px; background: var(--bg);
  border: 1px solid var(--border); cursor: pointer; flex-direction: column; align-items: center; justify-content: center; gap: 5px;
}
.nav-toggle span { display: block; width: 20px; height: 2px; background: var(--text); border-radius: 2px; transition: transform .3s, opacity .3s; }

/* ========== 面包屑 ========== */
.breadcrumb { display: flex; align-items: center; gap: 10px; font-size: 14px; color: var(--text-secondary); margin-bottom: 20px; flex-wrap: wrap; }
.breadcrumb a { color: var(--text-secondary); transition: color .2s; }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { color: var(--muted); }
.breadcrumb .current { color: var(--text); font-weight: 500; }

/* ========== 分类页页头 ========== */
.category-hero {
  position: relative; padding: 88px 0 76px; background-size: cover; background-position: center;
  border-bottom: 1px solid var(--border); overflow: hidden;
}
.category-hero::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(120deg, rgba(248,250,252,.95) 0%, rgba(237,244,250,.88) 50%, rgba(248,250,252,.75) 100%);
}
.category-hero .container { position: relative; z-index: 2; max-width: 920px; }
.category-hero h1 {
  font-size: 40px; font-weight: 700; line-height: 1.3; letter-spacing: .5px; color: var(--text);
  margin: 0 0 20px;
}
.category-hero .category-desc {
  font-size: 16px; color: var(--text-secondary); line-height: 1.9; max-width: 760px;
}

/* ========== Section 头 ========== */
.section-head { text-align: center; max-width: 760px; margin: 0 auto 52px; }
.section-head .badge {
  display: inline-block; background: var(--bg-light); color: var(--primary);
  font-size: 13px; font-weight: 600; padding: 6px 16px; border-radius: 20px;
  border: 1px solid rgba(91,141,184,.18); margin-bottom: 14px; letter-spacing: .5px;
}
.section-head h2 { font-size: 32px; font-weight: 700; line-height: 1.35; color: var(--text); margin-bottom: 14px; }
.section-head p { font-size: 16px; color: var(--text-secondary); line-height: 1.8; }

/* ========== 分类卡片区 ========== */
.category-cards-section { padding: var(--space) 0; background: var(--bg); }
.category-card-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px;
}
.category-card {
  background: var(--bg-white); border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--border); box-shadow: var(--shadow);
  transition: transform .35s ease, box-shadow .35s ease;
}
.category-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.category-card .card-img { position: relative; aspect-ratio: 16/10; overflow: hidden; background: var(--bg-light); }
.category-card .card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.category-card:hover .card-img img { transform: scale(1.05); }
.category-card .card-body { padding: 28px 28px 30px; }
.category-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 12px; color: var(--text); line-height: 1.4; }
.category-card .card-desc { font-size: 15px; color: var(--text-secondary); line-height: 1.8; margin-bottom: 18px; }
.card-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.tag {
  display: inline-block; background: var(--bg-light); color: var(--primary-dark);
  font-size: 12px; font-weight: 500; padding: 4px 12px; border-radius: 14px;
  border: 1px solid rgba(91,141,184,.14); transition: background .2s, color .2s;
}
.tag:hover { background: rgba(91,141,184,.12); color: var(--primary-dark); }
.text-link {
  font-size: 15px; font-weight: 600; color: var(--primary); display: inline-flex; align-items: center; gap: 6px;
  transition: gap .2s, color .2s;
}
.text-link:hover { color: var(--primary-dark); gap: 10px; }

/* ========== 推荐内容区 ========== */
.featured-section { padding: var(--space) 0; background: var(--bg-white); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.featured-grid { display: flex; flex-direction: column; gap: 32px; max-width: 1040px; margin: 0 auto; }
.featured-card {
  display: grid; grid-template-columns: 1fr 1fr; background: var(--bg);
  border-radius: var(--radius); border: 1px solid var(--border); overflow: hidden;
  box-shadow: var(--shadow); transition: box-shadow .3s, transform .3s;
}
.featured-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-3px); }
.featured-card:nth-child(even) .featured-img { order: 2; }
.featured-card .featured-img { aspect-ratio: 16/10; overflow: hidden; background: var(--bg-light); min-height: 260px; }
.featured-card .featured-img img { width: 100%; height: 100%; object-fit: cover; }
.featured-body { padding: 40px 44px; display: flex; flex-direction: column; justify-content: center; }
.featured-body .featured-label {
  display: inline-block; background: rgba(197,166,125,.15); color: var(--accent);
  font-size: 12px; font-weight: 600; padding: 4px 14px; border-radius: 14px; margin-bottom: 14px; align-self: flex-start;
}
.featured-body h3 { font-size: 24px; font-weight: 700; margin-bottom: 12px; color: var(--text); }
.featured-body p { font-size: 15px; color: var(--text-secondary); line-height: 1.85; margin-bottom: 20px; }

/* ========== 分隔带 ========== */
.divider-band {
  padding: 72px 0; background: var(--bg-light); text-align: center;
  border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
}
.divider-band p {
  font-size: 24px; font-weight: 600; color: var(--text); letter-spacing: 2px;
  max-width: 680px; margin: 0 auto; line-height: 1.6;
}
.divider-band p::before { content: '「'; color: var(--accent); }
.divider-band p::after { content: '」'; color: var(--accent); }

/* ========== FAQ 卡片区 ========== */
.faq-cards-section { padding: var(--space) 0; background: var(--bg); }
.faq-card-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 20px; max-width: 1080px; margin: 0 auto;
}
.faq-card {
  background: var(--bg-white); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 32px 32px 28px; box-shadow: var(--shadow); transition: box-shadow .3s, transform .3s, border-color .3s;
}
.faq-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-3px); border-color: rgba(91,141,184,.25); }
.faq-card .faq-q { display: flex; gap: 12px; align-items: flex-start; margin-bottom: 12px; }
.faq-card .faq-q .faq-icon {
  flex-shrink: 0; width: 28px; height: 28px; border-radius: 50%;
  background: var(--bg-light); color: var(--primary); display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 700; margin-top: 3px;
}
.faq-card h3 { font-size: 17px; font-weight: 700; color: var(--text); line-height: 1.5; }
.faq-card .faq-a { padding-left: 40px; font-size: 15px; color: var(--text-secondary); line-height: 1.8; }

/* ========== 转化 CTA ========== */
.compact-cta { padding: 72px 0; background: var(--bg-light); border-top: 1px solid var(--border); }
.cta-strip {
  display: flex; align-items: center; justify-content: space-between; gap: 32px;
  background: var(--bg-white); border-radius: 20px; padding: 40px 48px;
  box-shadow: var(--shadow); border: 1px solid var(--border); flex-wrap: wrap;
}
.cta-copy { flex: 1 1 320px; }
.cta-copy h2 { font-size: 26px; font-weight: 700; margin-bottom: 10px; color: var(--text); }
.cta-copy p { font-size: 15px; color: var(--text-secondary); }
.cta-form { display: flex; gap: 12px; flex-wrap: wrap; flex: 0 0 auto; min-width: 380px; }
.cta-form input {
  flex: 1 1 130px; background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius-xs); padding: 12px 16px; font-size: 14px; color: var(--text);
  transition: border-color .2s, background .2s, box-shadow .2s;
}
.cta-form input:focus { background: #fff; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(91,141,184,.15); }
.cta-form input::placeholder { color: var(--muted); }
.cta-form .btn-primary { flex-shrink: 0; }

/* ========== Footer ========== */
.site-footer { background: var(--bg-white); border-top: 1px solid var(--border); padding: 64px 0 0; }
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1.3fr; gap: 48px; padding-bottom: 48px;
}
.footer-brand .logo { margin-bottom: 16px; }
.footer-brand p { font-size: 14px; color: var(--text-secondary); line-height: 1.8; max-width: 280px; }
.footer-col h4 { font-size: 15px; font-weight: 700; margin-bottom: 16px; color: var(--text); }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { font-size: 14px; color: var(--text-secondary); transition: color .2s, padding-left .2s; }
.footer-col ul li a:hover { color: var(--primary); padding-left: 4px; }
.footer-contact li { font-size: 14px; color: var(--text-secondary); display: flex; gap: 10px; align-items: flex-start; }
.footer-contact li i { color: var(--primary); margin-top: 4px; width: 16px; text-align: center; }
.footer-bottom { border-top: 1px solid var(--border); padding: 20px 0; text-align: center; }
.footer-bottom p { font-size: 13px; color: var(--muted); }

/* ========== 响应式 ========== */
@media (max-width: 1023px) and (min-width: 768px) {
  .category-card-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .featured-card { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
  .cta-strip { flex-direction: column; align-items: flex-start; padding: 32px; }
  .cta-form { width: 100%; min-width: 0; }
  .cta-form input { flex: 1 1 calc(50% - 6px); }
}
@media (max-width: 767px) {
  .container { padding: 0 16px; }
  .header-inner { height: 64px; gap: 12px; }
  .logo-icon { width: 34px; height: 34px; font-size: 16px; }
  .logo-text { font-size: 17px; }
  .logo-text span { font-size: 12px; }
  .main-nav,
  .header-actions { display: none; }
  .nav-toggle { display: flex; }
  .header-inner.nav-open .main-nav {
    display: flex; flex-direction: column; position: absolute; top: 64px; left: 0; right: 0;
    background: var(--bg-white); border-bottom: 1px solid var(--border); padding: 16px; gap: 4px; box-shadow: var(--shadow-lg);
  }
  .header-inner.nav-open .header-actions {
    display: flex; flex-direction: column; position: absolute; top: 220px; left: 0; right: 0;
    background: var(--bg-white); border-bottom: 1px solid var(--border); padding: 16px; gap: 12px; box-shadow: var(--shadow-lg);
    align-items: stretch;
  }
  .header-inner.nav-open .header-actions .search-box { width: 100%; }
  .header-inner.nav-open .header-actions .btn-login { text-align: center; padding: 8px; }
  .header-inner.nav-open .header-actions .btn-primary { justify-content: center; }
  .header-inner.nav-open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .header-inner.nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
  .header-inner.nav-open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .category-hero { padding: 56px 0 48px; }
  .category-hero h1 { font-size: 29px; margin-bottom: 16px; }
  .category-hero .category-desc { font-size: 15px; }
  .breadcrumb { font-size: 13px; gap: 6px; margin-bottom: 16px; }
  .section-head { margin-bottom: 36px; }
  .section-head h2 { font-size: 26px; margin-bottom: 10px; }
  .section-head p { font-size: 15px; }
  .category-cards-section { padding: var(--space-mobile) 0; }
  .category-card-grid { grid-template-columns: 1fr; gap: 20px; }
  .category-card .card-body { padding: 22px 20px 24px; }
  .featured-section { padding: var(--space-mobile) 0; }
  .featured-grid { gap: 20px; }
  .featured-card { grid-template-columns: 1fr; }
  .featured-card:nth-child(even) .featured-img { order: 0; }
  .featured-card .featured-img { min-height: 200px; }
  .featured-body { padding: 24px 22px; }
  .featured-body h3 { font-size: 20px; }
  .featured-body p { font-size: 14px; }
  .divider-band { padding: 48px 0; }
  .divider-band p { font-size: 18px; line-height: 1.8; }
  .faq-cards-section { padding: var(--space-mobile) 0; }
  .faq-card-grid { grid-template-columns: 1fr; gap: 16px; }
  .faq-card { padding: 24px 20px; }
  .faq-card .faq-a { padding-left: 0; margin-top: 8px; font-size: 14px; }
  .compact-cta { padding: 48px 0; }
  .cta-strip { padding: 28px 20px; flex-direction: column; align-items: stretch; gap: 20px; }
  .cta-copy h2 { font-size: 22px; }
  .cta-form { min-width: 0; width: 100%; flex-direction: column; }
  .cta-form input { width: 100%; }
  .cta-form .btn-primary { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; padding-bottom: 32px; }
  .footer-brand p { max-width: none; }
  .footer-bottom p { font-size: 12px; }
}
@media (max-width: 520px) {
  .category-hero h1 { font-size: 25px; }
  .section-head h2 { font-size: 23px; }
  .featured-body h3 { font-size: 18px; }
  .footer-grid { grid-template-columns: 1fr; }
}