/* roulang page: index */
/* ===== 设计变量 ===== */
:root {
  --primary: #2F6D9E;
  --primary-dark: #1E4F75;
  --primary-light: #EAF2F8;
  --accent: #C9A961;
  --bg: #F7F9FC;
  --surface: #FFFFFF;
  --text: #1F2D3D;
  --text-secondary: #556573;
  --border: #E3E9F0;
  --shadow-sm: 0 2px 8px rgba(31, 54, 84, 0.06);
  --shadow-md: 0 4px 20px rgba(31, 54, 84, 0.08);
  --shadow-lg: 0 8px 32px rgba(31, 54, 84, 0.12);
  --radius-card: 12px;
  --radius-btn: 8px;
  --radius-tag: 6px;
  --font-main: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-main);
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

ul, ol { list-style: none; }

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

input, textarea { font-family: inherit; }

h1, h2, h3, h4 { line-height: 1.3; color: var(--text); }

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

.section { padding: 80px 0; }

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-header h2 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 12px;
  display: inline-block;
  position: relative;
  padding-bottom: 12px;
}

.section-header h2::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 48px;
  height: 4px;
  border-radius: 2px;
  background: var(--primary);
}

.section-header p {
  color: var(--text-secondary);
  font-size: 15px;
  max-width: 560px;
  margin: 16px auto 0;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  transition: all 0.25s ease;
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 2px 10px rgba(47, 109, 158, 0.25);
}

.btn-primary:hover {
  background: var(--primary-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(30, 79, 117, 0.3);
}

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

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

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

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

.btn-lg { padding: 16px 36px; font-size: 16px; border-radius: 10px; }

.btn:focus-visible,
a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* ===== 标签 ===== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 16px;
  background: var(--primary-light);
  color: var(--primary-dark);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
}

.tag {
  display: inline-block;
  padding: 4px 12px;
  background: var(--primary-light);
  color: var(--primary-dark);
  border-radius: var(--radius-tag);
  font-size: 13px;
  font-weight: 500;
}

/* ===== 导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 20px;
}

.logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.logo .logo-badge {
  font-size: 12px;
  font-weight: 600;
  color: var(--primary-dark);
  background: var(--primary-light);
  padding: 2px 10px;
  border-radius: 999px;
  letter-spacing: 0.5px;
}

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

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

.nav-link {
  padding: 8px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  border-radius: var(--radius-btn);
  position: relative;
  transition: color 0.2s ease, background 0.2s ease;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  border-radius: 1px;
  background: var(--primary);
  transition: width 0.25s ease;
}

.nav-link:hover { color: var(--primary); background: rgba(47, 109, 158, 0.05); }
.nav-link:hover::after { width: 50%; }
.nav-link.active { color: var(--primary); font-weight: 600; }
.nav-link.active::after { width: 100%; }

.btn-header { padding: 10px 24px; font-size: 14px; }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  border-radius: 6px;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
}

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

.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 移动端菜单面板 */
.mobile-menu {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  background: #fff;
  padding: 24px;
  box-shadow: var(--shadow-lg);
  z-index: 99;
  border-bottom: 1px solid var(--border);
}

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

.mobile-menu .nav-link {
  display: block;
  padding: 14px 16px;
  font-size: 17px;
  border-bottom: 1px solid var(--bg);
  border-radius: 0;
}

.mobile-menu .nav-link::after { display: none; }

.mobile-menu .nav-link:hover { background: var(--primary-light); }

.mobile-menu .btn {
  margin-top: 16px;
  width: 100%;
}

/* ===== Hero 首屏 ===== */
.hero {
  position: relative;
  padding: 100px 0 80px;
  overflow: hidden;
  background: linear-gradient(160deg, var(--bg) 0%, #FFFFFF 100%);
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
  opacity: 0.12;
  z-index: 0;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-content { max-width: 600px; }

.hero h1 {
  font-size: 42px;
  line-height: 1.3;
  font-weight: 700;
  margin-bottom: 20px;
  letter-spacing: 0.5px;
}

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

.hero-subtitle {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 32px;
  max-width: 520px;
}

.hero-cta { display: flex; gap: 16px; margin-bottom: 28px; flex-wrap: wrap; }

.hero-badges { display: flex; gap: 12px; flex-wrap: wrap; }

/* Hero 信息卡 */
.hero-card {
  background: var(--surface);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-lg);
  padding: 32px;
  border: 1px solid var(--border);
  max-width: 420px;
  margin-left: auto;
  position: relative;
}

.hero-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 32px;
  right: 32px;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 3px;
}

.hero-card-top {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}

.app-icon {
  width: 56px;
  height: 56px;
  background: var(--primary);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 4px 14px rgba(47, 109, 158, 0.3);
  flex-shrink: 0;
}

.app-icon svg { width: 28px; height: 28px; }

.hero-card-top h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 2px;
}

.hero-card-top p {
  font-size: 13px;
  color: var(--text-secondary);
}

.hero-card-info { margin-bottom: 20px; }

.info-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}

.info-row:last-child { border-bottom: none; }

.info-row span { color: var(--text-secondary); }

.info-row strong {
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--text);
}

.hero-card-progress { margin-top: 8px; }

.progress-text {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  margin-bottom: 8px;
  color: var(--text-secondary);
}

.progress-text strong { color: var(--primary); }

.progress-bar {
  height: 6px;
  background: var(--primary-light);
  border-radius: 3px;
  overflow: hidden;
}

.progress-bar div {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--primary-dark));
  border-radius: 3px;
}

/* ===== 统计条 ===== */
.stats-strip {
  background: var(--surface);
  border-block: 1px solid var(--border);
  padding: 32px 0;
}

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

.stat-item { text-align: center; }

.stat-item .stat-num {
  font-size: 32px;
  font-weight: 700;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
}

.stat-item .stat-label {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ===== 核心优势 2×2 ===== */
.features-section { background: var(--surface); }

.feature-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 36px 32px;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 0;
  background: var(--primary);
  transition: height 0.3s ease;
}

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

.feature-card:hover::before { height: 100%; }

.feature-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 10px;
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 16px;
  font-variant-numeric: tabular-nums;
}

.feature-icon {
  width: 48px;
  height: 48px;
  background: var(--primary-light);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--primary);
}

.feature-icon svg { width: 24px; height: 24px; }

.feature-card h3 {
  font-size: 19px;
  font-weight: 600;
  margin-bottom: 10px;
}

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

.feature-card .feature-tag {
  display: inline-block;
  margin-top: 14px;
  font-size: 12px;
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 1px;
}

/* ===== 轮播 ===== */
.carousel-section { background: var(--bg); }

.orbit {
  max-width: 1000px;
  margin: 0 auto;
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: var(--surface);
}

.orbit-wrapper { position: relative; }

.orbit-container { display: flex; overflow: hidden; }

.orbit-slide {
  min-width: 100%;
  display: flex;
  transition: transform 0.5s ease;
}

.orbit-figure {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 0;
  width: 100%;
  margin: 0;
  min-height: 420px;
}

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

.orbit-caption {
  padding: 48px 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background: var(--surface);
}

.orbit-caption .slide-tag {
  display: inline-block;
  padding: 4px 12px;
  background: var(--primary-light);
  color: var(--primary-dark);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 16px;
  width: fit-content;
}

.orbit-caption h3 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 14px;
}

.orbit-caption p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
}

.orbit-caption ul {
  list-style: none;
  margin: 0;
}

.orbit-caption ul li {
  font-size: 14px;
  color: var(--text);
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 8px;
}

.orbit-caption ul li:last-child { border-bottom: none; }

.orbit-caption ul li::before {
  content: "✓";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 50%;
  font-size: 11px;
  flex-shrink: 0;
}

.orbit-prev-btn,
.orbit-next-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: #fff;
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text);
  z-index: 10;
  transition: all 0.25s ease;
  font-size: 18px;
}

.orbit-prev-btn { left: 16px; }
.orbit-next-btn { right: 16px; }

.orbit-prev-btn:hover,
.orbit-next-btn:hover {
  background: var(--primary-light);
  color: var(--primary);
}

.orbit-bullets {
  display: flex;
  justify-content: center;
  gap: 8px;
  padding: 16px;
  background: var(--surface);
}

.orbit-bullets button {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--border);
  transition: all 0.3s ease;
  padding: 0;
}

.orbit-bullets button.is-active {
  background: var(--primary);
  width: 24px;
  border-radius: 4px;
}

/* ===== 系统要求 ===== */
.system-section { background: var(--surface); }

.config-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  max-width: 960px;
  margin: 0 auto;
}

.config-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 32px;
  transition: box-shadow 0.3s ease;
}

.config-card:hover { box-shadow: var(--shadow-md); }

.config-card .config-label {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 4px 16px;
  background: var(--primary-light);
  color: var(--primary-dark);
  font-size: 13px;
  font-weight: 600;
  border-radius: 999px;
  margin-bottom: 20px;
}

.config-card.recommended .config-label {
  background: rgba(201, 169, 97, 0.15);
  color: #8a6d2f;
}

.config-card h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 24px;
}

.config-list { margin: 0; }

.config-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}

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

.config-list .config-label-item { color: var(--text-secondary); }

.config-list kbd,
.config-list .config-value {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: 4px;
  font-family: "SF Mono", Consolas, "Courier New", monospace;
  font-size: 13px;
  color: var(--text);
  font-weight: 500;
}

/* ===== 用户评价 ===== */
.reviews-section { background: var(--bg); }

.review-wall {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: start;
}

.review-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
  position: relative;
}

.review-card::before {
  content: "\201C";
  position: absolute;
  top: 12px;
  right: 20px;
  font-size: 64px;
  font-family: Georgia, serif;
  color: var(--primary-light);
  line-height: 1;
  pointer-events: none;
}

.review-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.review-stars {
  display: flex;
  gap: 2px;
  margin-bottom: 14px;
}

.review-stars svg { width: 16px; height: 16px; fill: var(--accent); }

.review-stars svg.empty { fill: var(--border); }

.review-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

.review-user {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}

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

.review-user .user-role {
  font-size: 12px;
  color: var(--text-secondary);
  background: var(--primary-light);
  padding: 2px 10px;
  border-radius: 999px;
}

/* ===== 下载区 ===== */
.download-section {
  background: var(--primary-light);
  position: relative;
  overflow: hidden;
}

.download-section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
  opacity: 0.06;
}

.download-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.download-card {
  background: var(--surface);
  border-radius: var(--radius-card);
  border: 1px solid var(--border);
  padding: 32px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
  position: relative;
}

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

.download-card .hot-tag {
  position: absolute;
  top: 16px;
  right: 16px;
  background: rgba(201, 169, 97, 0.15);
  color: #8a6d2f;
  font-size: 12px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 999px;
}

.download-card .dl-icon {
  width: 64px;
  height: 64px;
  background: var(--primary);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  color: #fff;
}

.download-card .dl-icon svg { width: 30px; height: 30px; }

.download-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 6px;
}

.download-card .platform {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.download-card .version-info {
  display: flex;
  justify-content: center;
  gap: 20px;
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.download-card .version-info strong {
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.download-card .btn { width: 100%; }

.download-note {
  position: relative;
  z-index: 1;
  text-align: center;
  margin-top: 32px;
  font-size: 13px;
  color: var(--text-secondary);
}

/* ===== 最新资讯 ===== */
.news-section { background: var(--surface); }

.news-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.news-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 24px;
  display: block;
  transition: all 0.3s ease;
  height: 100%;
}

.news-card:hover {
  background: var(--surface);
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

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

.news-card .news-tag {
  display: inline-block;
  padding: 4px 12px;
  background: var(--primary-light);
  color: var(--primary-dark);
  border-radius: var(--radius-tag);
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 12px;
}

.news-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
  transition: color 0.2s ease;
  line-height: 1.4;
}

.news-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.news-date {
  font-size: 13px;
  color: var(--text-secondary);
  font-variant-numeric: tabular-nums;
}

.news-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.2s ease;
}

.news-card:hover .news-link { gap: 8px; }

.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 24px;
  border: 2px dashed var(--border);
  border-radius: var(--radius-card);
  color: var(--text-secondary);
  font-size: 15px;
}

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

.accordion-container {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  margin-bottom: 16px;
  overflow: hidden;
  transition: box-shadow 0.3s ease;
}

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

.faq-item.open { border-color: var(--primary); box-shadow: var(--shadow-md); }

.faq-q {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  text-align: left;
  background: var(--surface);
  transition: color 0.2s ease;
}

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

.faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
  transition: all 0.3s ease;
}

.faq-q[aria-expanded="true"] .faq-icon {
  background: var(--primary);
  color: #fff;
  transform: rotate(45deg);
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

.faq-a-inner {
  padding: 0 24px 20px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  border-top: 1px solid var(--bg);
  margin: 0 24px;
  padding: 16px 0 20px;
}

/* ===== CTA 横幅 ===== */
.cta-section { background: var(--surface); padding: 64px 0; }

.cta-banner {
  background: var(--primary-light);
  border-radius: 20px;
  padding: 48px 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  position: relative;
  overflow: hidden;
}

.cta-banner::after {
  content: "";
  position: absolute;
  top: -40px;
  right: -40px;
  width: 160px;
  height: 160px;
  background: rgba(47, 109, 158, 0.08);
  border-radius: 50%;
}

.cta-banner h2 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 8px;
}

.cta-banner p {
  font-size: 15px;
  color: var(--text-secondary);
}

.cta-banner .btn { flex-shrink: 0; }

/* ===== 页脚 ===== */
.site-footer {
  background: #1F2D3D;
  color: rgba(255, 255, 255, 0.72);
  padding: 64px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}

.footer-col h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 20px;
}

.footer-col p {
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 12px;
}

.footer-logo {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}

.footer-col a {
  display: block;
  color: rgba(255, 255, 255, 0.72);
  font-size: 14px;
  padding: 6px 0;
  transition: color 0.2s ease;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 20px 0;
  text-align: center;
  font-size: 13px;
}

.footer-bottom p { margin: 0; }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .main-nav { display: none; }
  .btn-header { display: none; }
  .hamburger { display: flex; }

  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-card { margin: 0 auto; }

  .review-wall { grid-template-columns: 1fr 1fr; }
  .download-grid { grid-template-columns: 1fr 1fr; }
  .feature-grid { gap: 16px; }
}

@media (max-width: 768px) {
  .section { padding: 56px 0; }
  .section-header { margin-bottom: 32px; }
  .section-header h2 { font-size: 26px; }

  .hero { padding: 60px 0; }
  .hero h1 { font-size: 30px; }
  .hero-subtitle { font-size: 16px; }

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

  .feature-grid { grid-template-columns: 1fr; }
  .feature-card { padding: 28px 24px; }

  .config-grid { grid-template-columns: 1fr; }
  .review-wall { grid-template-columns: 1fr; }
  .download-grid { grid-template-columns: 1fr; }
  .news-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }

  .cta-banner { flex-direction: column; text-align: center; padding: 32px 24px; }
  .cta-banner .btn { width: 100%; }

  .orbit-figure { grid-template-columns: 1fr; }
  .orbit-figure img.orbit-image { height: 220px; }
  .orbit-caption { padding: 32px 24px; }

  .hero-cta { flex-direction: column; }
  .hero-cta .btn { width: 100%; }
}

@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .hero h1 { font-size: 26px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .header-inner { height: 60px; }
  .mobile-menu { top: 60px; }
  .logo { font-size: 16px; }
  .hero-card { padding: 20px; }
  .review-card { padding: 20px; }
  .download-card { padding: 24px; }
}

/* 可访问性 */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; scroll-behavior: auto !important; }
}

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

/* roulang page: category1 */
:root {
  --primary: #2F6D9E;
  --primary-dark: #1E4F75;
  --primary-light: #EAF2F8;
  --accent: #C9A961;
  --bg: #F7F9FC;
  --surface: #FFFFFF;
  --text: #1F2D3D;
  --text-secondary: #556573;
  --border: #E3E9F0;
  --shadow-sm: 0 2px 8px rgba(31, 54, 84, 0.06);
  --shadow-md: 0 4px 20px rgba(31, 54, 84, 0.08);
  --shadow-lg: 0 8px 32px rgba(31, 54, 84, 0.12);
  --radius-card: 12px;
  --radius-btn: 8px;
  --radius-sm: 6px;
}

*, *::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", "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

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

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

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

button {
  cursor: pointer;
  font-family: inherit;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 16px;
  width: 100%;
}

/* ===== 导航 ===== */
.site-header {
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 100;
  height: 72px;
  display: flex;
  align-items: center;
}

.site-header .header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: 24px;
}

.logo {
  font-size: 24px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.5px;
  white-space: nowrap;
  line-height: 1.3;
}

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

.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-left: auto;
}

.main-nav .nav-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  padding: 8px 2px;
  border-bottom: 2px solid transparent;
  transition: all 0.2s ease;
  line-height: 1.4;
}

.main-nav .nav-link:hover {
  color: var(--primary);
}

.main-nav .nav-link.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.header-cta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: 16px;
}

.btn-download {
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-btn);
  padding: 10px 24px;
  font-size: 15px;
  font-weight: 600;
  transition: background 0.2s ease, transform 0.15s ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

.btn-download:hover {
  background: var(--primary-dark);
  color: #fff;
}

.btn-download:active {
  transform: translateY(1px);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  width: 40px;
  height: 40px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

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

/* ===== Hero ===== */
.page-hero {
  background: linear-gradient(135deg, var(--bg) 0%, #ffffff 100%);
  padding: 84px 0 64px;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 45%;
  height: 100%;
  background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  opacity: 0.12;
  z-index: 0;
}

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

.breadcrumb {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.breadcrumb a {
  color: var(--text-secondary);
}

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

.breadcrumb .sep {
  margin: 0 8px;
  color: #B0BCC9;
}

.page-hero h1 {
  font-size: 40px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text);
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}

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

.page-hero .hero-desc {
  font-size: 17px;
  color: var(--text-secondary);
  max-width: 620px;
  line-height: 1.8;
  margin-bottom: 28px;
}

.hero-ctas {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 32px;
}

.hero-badge-row {
  display: flex;
  gap: 16px;
  margin-top: 36px;
  flex-wrap: wrap;
}

.hero-badge {
  background: var(--primary-light);
  border-radius: 999px;
  padding: 6px 18px;
  font-size: 13px;
  color: var(--primary-dark);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.hero-badge svg {
  width: 14px;
  height: 14px;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  padding: 12px 28px;
  transition: all 0.2s ease;
  border: none;
  line-height: 1.5;
  text-align: center;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  color: #fff;
  transform: translateY(-1px);
}

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

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 1.5px solid var(--primary);
}

.btn-outline:hover {
  background: var(--primary-light);
  color: var(--primary-dark);
}

.btn-lg {
  padding: 15px 36px;
  font-size: 16px;
  border-radius: 10px;
}

.btn:focus-visible,
.nav-link:focus-visible,
a:focus-visible,
.accordion-title:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* ===== 板块 ===== */
.section-block {
  padding: 88px 0;
}

.section-block.alt-bg {
  background: var(--surface);
}

.section-head {
  margin-bottom: 48px;
  max-width: 760px;
}

.section-head .section-tag {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary-dark);
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  padding: 4px 14px;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}

.section-head h2 {
  font-size: 30px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.35;
  margin-bottom: 12px;
  position: relative;
  padding-bottom: 12px;
}

.section-head h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 48px;
  height: 4px;
  border-radius: 2px;
  background: var(--primary);
}

.section-head p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-top: 14px;
}

/* ===== 卖点卡片 ===== */
.features-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 24px;
}

.feature-card {
  background: var(--surface);
  border-radius: var(--radius-card);
  padding: 32px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
  position: relative;
}

.feature-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: #D0D9E4;
}

.feature-card .feature-icon {
  width: 48px;
  height: 48px;
  background: var(--primary-light);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.feature-card .feature-icon svg {
  width: 24px;
  height: 24px;
  stroke: var(--primary);
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.feature-card h3 {
  font-size: 19px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text);
  line-height: 1.4;
}

.feature-card p {
  font-size: 14.5px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 0;
}

.feature-card .feature-num {
  position: absolute;
  top: 24px;
  right: 24px;
  font-size: 36px;
  font-weight: 700;
  color: var(--primary-light);
  line-height: 1;
}

/* ===== 场景图文 ===== */
.scene-grid {
  display: flex;
  flex-direction: column;
  gap: 56px;
}

.scene-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.scene-row.reverse .scene-text {
  order: 1;
}

.scene-row.reverse .scene-img {
  order: 0;
}

.scene-img {
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.scene-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 4/3;
  transition: transform 0.4s ease;
}

.scene-img:hover img {
  transform: scale(1.03);
}

.scene-text .scene-tag {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary-dark);
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  padding: 4px 12px;
  margin-bottom: 14px;
}

.scene-text h3 {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 12px;
  line-height: 1.4;
}

.scene-text p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

.scene-list {
  list-style: none;
  padding: 0;
  margin: 0 0 20px;
}

.scene-list li {
  padding: 6px 0 6px 24px;
  position: relative;
  font-size: 14.5px;
  color: var(--text);
}

.scene-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 14px;
  width: 14px;
  height: 14px;
  border-radius: 4px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%232F6D9E' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E") center/contain no-repeat;
}

/* ===== 流程步骤 ===== */
.steps-section {
  background: var(--primary) !important;
  padding: 88px 0 !important;
  position: relative;
}

.steps-section .section-head h2 {
  color: #fff;
}

.steps-section .section-head h2::after {
  background: var(--accent);
}

.steps-section .section-head p {
  color: rgba(255, 255, 255, 0.82);
}

.steps-section .section-tag {
  background: rgba(255, 255, 255, 0.16);
  color: #fff;
}

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

.step-card {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius-card);
  padding: 30px 24px;
  text-align: left;
  transition: background 0.3s ease, transform 0.3s ease;
  backdrop-filter: none;
}

.step-card:hover {
  background: rgba(255, 255, 255, 0.14);
  transform: translateY(-4px);
}

.step-card .step-num {
  font-size: 32px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 14px;
  display: block;
}

.step-card h3 {
  font-size: 17px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 8px;
}

.step-card p {
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.65;
  margin-bottom: 0;
}

/* ===== 数据统计 ===== */
.stats-section {
  background: var(--surface);
  padding: 64px 0;
  border-bottom: 1px solid var(--border);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.stat-item {
  text-align: center;
  padding: 16px;
}

.stat-item .stat-num {
  font-size: 38px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
  margin-bottom: 6px;
  font-variant-numeric: tabular-nums;
}

.stat-item .stat-label {
  font-size: 14px;
  color: var(--text-secondary);
}

/* ===== 双栏卡片 ===== */
.guide-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.guide-card {
  background: var(--surface);
  border-radius: var(--radius-card);
  padding: 32px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: all 0.25s ease;
}

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

.guide-card .guide-tag {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary-dark);
  border-radius: var(--radius-sm);
  font-size: 12.5px;
  font-weight: 600;
  padding: 3px 12px;
  margin-bottom: 14px;
}

.guide-card h3 {
  font-size: 19px;
  font-weight: 600;
  margin-bottom: 10px;
  line-height: 1.4;
}

.guide-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}

.guide-card .guide-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.2s ease;
}

.guide-card .guide-link:hover {
  gap: 8px;
  color: var(--primary-dark);
}

/* ===== FAQ ===== */
.faq-section {
  background: var(--surface);
  padding: 88px 0;
}

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

.accordion-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-bottom: 16px;
  overflow: hidden;
  transition: box-shadow 0.25s ease;
}

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

.accordion-item.open {
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.accordion-title {
  width: 100%;
  background: none;
  border: none;
  padding: 20px 24px;
  font-size: 15.5px;
  font-weight: 600;
  color: var(--text);
  display: flex;
  justify-content: space-between;
  align-items: center;
  text-align: left;
  gap: 16px;
}

.accordion-title .icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--primary);
  transition: transform 0.3s ease, background 0.3s ease, color 0.3s ease;
  font-style: normal;
  line-height: 1;
}

.accordion-item.open .accordion-title .icon {
  transform: rotate(45deg);
  background: var(--primary);
  color: #fff;
}

.accordion-content {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  border-top: 0 solid transparent;
}

.accordion-item.open .accordion-content {
  padding: 0 24px 20px;
  max-height: 400px;
  border-top: 1px solid var(--border);
}

.accordion-content p {
  font-size: 14.5px;
  color: var(--text-secondary);
  line-height: 1.75;
  padding-top: 14px;
  margin-bottom: 0;
}

/* ===== CTA ===== */
.cta-banner {
  background: var(--primary-light);
  border-radius: 16px;
  padding: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  border: 1px solid #D5E4EF;
}

.cta-banner h2 {
  font-size: 26px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
  line-height: 1.4;
}

.cta-banner p {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 0;
}

.cta-banner .btn-cta-group {
  display: flex;
  gap: 12px;
  flex-shrink: 0;
}

/* ===== 页脚 ===== */
.site-footer {
  background: #1F2D3D;
  padding: 64px 0 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 48px;
  margin-bottom: 40px;
}

.footer-logo {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}

.footer-col p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.72);
  line-height: 1.7;
  margin-bottom: 10px;
}

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

.footer-col a {
  display: block;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.72);
  margin-bottom: 10px;
  transition: color 0.2s ease;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 0;
}

/* ===== 响应式 ===== */
@media screen and (max-width: 1024px) {
  .main-nav {
    gap: 18px;
  }

  .logo {
    font-size: 20px;
  }

  .nav-toggle {
    display: flex;
  }

  .main-nav {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--surface);
    flex-direction: column;
    align-items: flex-start;
    padding: 24px;
    gap: 20px;
    box-shadow: var(--shadow-md);
    transform: translateY(-120%);
    transition: transform 0.3s ease;
    z-index: 99;
  }

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

  .main-nav .nav-link {
    font-size: 18px;
    padding: 8px 0;
  }

  .header-cta {
    margin-left: auto;
  }

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

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

  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }

  .cta-banner {
    padding: 36px;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
  }

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

@media screen and (max-width: 768px) {
  .section-block {
    padding: 64px 0;
  }

  .page-hero {
    padding: 56px 0 48px;
  }

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

  .scene-row {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .scene-row.reverse .scene-text {
    order: 0;
  }

  .scene-row.reverse .scene-img {
    order: 1;
  }

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

  .cta-banner h2 {
    font-size: 22px;
  }

  .cta-banner .btn-cta-group {
    flex-direction: column;
    width: 100%;
  }

  .cta-banner .btn-cta-group .btn {
    width: 100%;
  }

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

@media screen and (max-width: 520px) {
  .site-header {
    height: 60px;
  }

  .logo {
    font-size: 17px;
  }

  .btn-download {
    padding: 8px 16px;
    font-size: 14px;
  }

  .page-hero h1 {
    font-size: 27px;
  }

  .hero-ctas {
    flex-direction: column;
    width: 100%;
  }

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

  .hero-badge-row {
    gap: 10px;
  }

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

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

  .feature-card {
    padding: 24px;
  }

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

  .cta-banner {
    padding: 28px;
  }
}

/* roulang page: article */
:root {
      --primary: #2F6D9E;
      --primary-dark: #1E4F75;
      --primary-light: #EAF2F8;
      --accent: #C9A961;
      --bg: #F7F9FC;
      --surface: #FFFFFF;
      --text: #1F2D3D;
      --text-secondary: #556573;
      --border: #E3E9F0;
      --shadow-sm: 0 2px 8px rgba(31, 54, 84, 0.06);
      --shadow-md: 0 4px 20px rgba(31, 54, 84, 0.08);
      --shadow-lg: 0 8px 32px rgba(31, 54, 84, 0.12);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-sm: 6px;
      --container: 1200px;
    }

    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
      color: var(--text);
      background: var(--bg);
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
    }
    img { max-width: 100%; display: block; }
    a { text-decoration: none; color: inherit; transition: color 0.2s ease; }
    button, input, select, textarea { font: inherit; }

    .container {
      max-width: var(--container);
      margin: 0 auto;
      padding: 0 24px;
      width: 100%;
    }
    .container-narrow {
      max-width: 880px;
      margin: 0 auto;
      padding: 0 24px;
      width: 100%;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 24px;
      border-radius: var(--radius-btn);
      font-size: 15px;
      font-weight: 600;
      line-height: 1;
      white-space: nowrap;
      transition: all 0.25s ease;
      cursor: pointer;
      border: 1px solid transparent;
      min-height: 44px;
    }
    .btn-primary {
      background: var(--primary);
      color: #fff;
    }
    .btn-primary:hover {
      background: var(--primary-dark);
      color: #fff;
      transform: translateY(-1px);
      box-shadow: var(--shadow-md);
    }
    .btn-primary:active { transform: translateY(0); }
    .btn-outline {
      background: var(--surface);
      border-color: var(--primary);
      color: var(--primary);
    }
    .btn-outline:hover {
      background: var(--primary-light);
      color: var(--primary-dark);
    }
    .btn-lg { padding: 16px 32px; font-size: 16px; min-height: 52px; }
    .btn:focus-visible {
      outline: 2px solid var(--primary);
      outline-offset: 2px;
    }

    .tag {
      display: inline-flex;
      align-items: center;
      padding: 5px 14px;
      background: var(--primary-light);
      color: var(--primary-dark);
      border-radius: var(--radius-sm);
      font-size: 13px;
      font-weight: 600;
      transition: all 0.2s ease;
    }
    .tag:hover {
      background: var(--primary);
      color: #fff;
    }

    .section-title {
      font-size: 28px;
      font-weight: 700;
      line-height: 1.35;
      margin-bottom: 12px;
      position: relative;
      padding-left: 16px;
    }
    .section-title::before {
      content: "";
      position: absolute;
      left: 0;
      top: 5px;
      width: 4px;
      height: 26px;
      border-radius: 4px;
      background: var(--primary);
    }
    .section-subtitle {
      color: var(--text-secondary);
      font-size: 14px;
      margin-bottom: 40px;
    }

    /* ===== Header ===== */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.96);
      border-bottom: 1px solid var(--border);
      height: 72px;
    }
    .site-header .container {
      height: 100%;
      display: flex;
      align-items: center;
      gap: 24px;
    }
    .logo {
      font-size: 20px;
      font-weight: 800;
      color: var(--text);
      letter-spacing: 0.3px;
      white-space: nowrap;
      line-height: 1.2;
    }
    .logo span { color: var(--primary); }
    .main-nav {
      display: flex;
      align-items: center;
      gap: 6px;
      margin: 0 auto;
    }
    .nav-link {
      display: inline-block;
      padding: 8px 14px;
      border-radius: 8px;
      font-size: 14px;
      font-weight: 500;
      color: var(--text-secondary);
      transition: all 0.2s ease;
    }
    .nav-link:hover {
      color: var(--primary);
      background: var(--primary-light);
    }
    .nav-link.active {
      color: var(--primary);
      background: var(--primary-light);
      font-weight: 600;
    }
    .btn-header { margin-left: auto; }
    .nav-toggle {
      display: none;
      width: 44px;
      height: 44px;
      align-items: center;
      justify-content: center;
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 8px;
      color: var(--text);
      font-size: 18px;
      cursor: pointer;
      transition: all 0.2s ease;
    }
    .nav-toggle:hover {
      background: var(--primary-light);
      color: var(--primary);
    }

    /* ===== Breadcrumb ===== */
    .breadcrumb-bar {
      background: var(--surface);
      border-bottom: 1px solid var(--border);
      padding: 12px 0;
      font-size: 13px;
      color: var(--text-secondary);
    }
    .breadcrumb-bar a { color: var(--text-secondary); }
    .breadcrumb-bar a:hover { color: var(--primary); }
    .breadcrumb-sep { margin: 0 8px; color: var(--border); }
    .breadcrumb-current { color: var(--text); font-weight: 500; }

    /* ===== Article Banner ===== */
    .article-banner {
      background: linear-gradient(135deg, var(--primary-light) 0%, #F7F9FC 70%);
      border-bottom: 1px solid var(--border);
      padding: 64px 0 48px;
      text-align: center;
    }
    .article-banner .tag { margin-bottom: 18px; }
    .article-title {
      font-size: 40px;
      line-height: 1.3;
      font-weight: 700;
      color: var(--text);
      max-width: 900px;
      margin: 0 auto 22px;
      letter-spacing: -0.02em;
    }
    .article-meta {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 18px;
      color: var(--text-secondary);
      font-size: 13px;
    }
    .article-meta-item {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .article-meta-item i { color: var(--primary); }

    /* ===== Article Body ===== */
    .article-section { padding: 56px 0 64px; }
    .article-body {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      padding: 48px;
      box-shadow: var(--shadow-sm);
    }
    .article-body > *:first-child { margin-top: 0; }
    .article-body > *:last-child { margin-bottom: 0; }
    .article-body p {
      margin: 0 0 1.5em;
      font-size: 16px;
      line-height: 1.85;
      color: #253342;
    }
    .article-body h2 {
      font-size: 26px;
      font-weight: 700;
      margin: 2em 0 0.8em;
      padding-bottom: 12px;
      border-bottom: 2px solid var(--primary-light);
      position: relative;
    }
    .article-body h2::after {
      content: "";
      position: absolute;
      left: 0;
      bottom: -2px;
      width: 48px;
      height: 2px;
      background: var(--primary);
    }
    .article-body h3 {
      font-size: 20px;
      font-weight: 600;
      margin: 1.8em 0 0.6em;
    }
    .article-body h4 {
      font-size: 17px;
      font-weight: 600;
      margin: 1.5em 0 0.5em;
    }
    .article-body ul,
    .article-body ol {
      margin: 0 0 1.5em 1.2em;
      padding-left: 0.4em;
    }
    .article-body li { margin-bottom: 8px; line-height: 1.75; }
    .article-body ul li::marker { color: var(--primary); }
    .article-body blockquote {
      margin: 1.8em 0;
      padding: 16px 24px;
      background: var(--primary-light);
      border-left: 4px solid var(--primary);
      border-radius: 0 8px 8px 0;
      color: var(--text-secondary);
    }
    .article-body blockquote p { margin-bottom: 0; }
    .article-body img {
      max-width: 100%;
      border-radius: 8px;
      box-shadow: var(--shadow-sm);
      margin: 24px auto;
    }
    .article-body code {
      font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
      background: var(--primary-light);
      color: var(--primary-dark);
      padding: 2px 8px;
      border-radius: 4px;
      font-size: 14px;
    }
    .article-body pre {
      background: #1F2D3D;
      color: #E6ECF2;
      padding: 20px 24px;
      border-radius: 8px;
      overflow-x: auto;
      margin: 1.8em 0;
      font-size: 14px;
      line-height: 1.7;
    }
    .article-body pre code {
      background: none;
      color: inherit;
      padding: 0;
    }
    .article-body a {
      color: var(--primary);
      border-bottom: 1px solid transparent;
    }
    .article-body a:hover { border-bottom-color: var(--primary); }
    .article-body table {
      width: 100%;
      border-collapse: collapse;
      margin: 1.5em 0;
    }
    .article-body th,
    .article-body td {
      padding: 12px 16px;
      border: 1px solid var(--border);
      text-align: left;
    }
    .article-body th {
      background: var(--primary-light);
      font-weight: 600;
      color: var(--primary-dark);
    }

    .not-found {
      background: var(--surface);
      border: 1px dashed var(--border);
      border-radius: var(--radius-card);
      padding: 64px 24px;
      text-align: center;
      color: var(--text-secondary);
    }
    .not-found i {
      font-size: 40px;
      color: var(--primary);
      margin-bottom: 16px;
    }
    .not-found p { margin-bottom: 24px; }

    .article-footer-nav {
      text-align: center;
      margin-top: 40px;
    }
    .article-footer-nav a {
      color: var(--primary);
      font-size: 15px;
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      transition: all 0.2s ease;
    }
    .article-footer-nav a i { transition: transform 0.2s ease; }
    .article-footer-nav a:hover i { transform: translateX(-4px); }

    /* ===== Related ===== */
    .related-section { padding: 72px 0; }
    .related-card {
      display: flex;
      flex-direction: column;
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      height: 100%;
    }
    .related-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: #CBD7E3;
    }
    .related-card-thumb {
      aspect-ratio: 16 / 9;
      overflow: hidden;
      background: var(--primary-light);
    }
    .related-card-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .related-card:hover .related-card-thumb img { transform: scale(1.05); }
    .related-card-body { padding: 20px 22px 22px; flex: 1; display: flex; flex-direction: column; }
    .related-card-body h3 {
      font-size: 16px;
      font-weight: 600;
      margin-bottom: 8px;
      color: var(--text);
      line-height: 1.5;
      transition: color 0.2s ease;
    }
    .related-card:hover .related-card-body h3 { color: var(--primary); }
    .related-card-body p {
      font-size: 14px;
      color: var(--text-secondary);
      margin-bottom: 14px;
      line-height: 1.6;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
      flex: 1;
    }
    .related-card-meta {
      font-size: 13px;
      color: var(--text-secondary);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .related-card-meta i { color: var(--primary); }

    /* ===== CTA ===== */
    .cta-banner {
      position: relative;
      padding: 72px 0;
      text-align: center;
      background: var(--primary-light);
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
    }
    .cta-banner::before {
      content: "";
      position: absolute;
      inset: 0;
      background: rgba(247, 249, 252, 0.9);
    }
    .cta-banner .container { position: relative; z-index: 1; }
    .cta-banner h2 {
      font-size: 30px;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text);
      line-height: 1.35;
    }
    .cta-banner p {
      color: var(--text-secondary);
      margin-bottom: 32px;
      max-width: 600px;
      margin-left: auto;
      margin-right: auto;
    }
    .cta-actions {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
    }

    /* ===== Footer ===== */
    .site-footer {
      background: #1F2D3D;
      color: rgba(255, 255, 255, 0.72);
      padding: 64px 0 0;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
      gap: 40px;
      padding-bottom: 48px;
    }
    .footer-col .footer-logo {
      font-size: 18px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 12px;
    }
    .footer-col .footer-logo span { color: var(--accent); }
    .footer-col p {
      font-size: 14px;
      line-height: 1.7;
      margin-bottom: 12px;
      color: rgba(255, 255, 255, 0.6);
    }
    .footer-col h4 {
      font-size: 15px;
      color: #fff;
      margin-bottom: 16px;
      font-weight: 600;
    }
    .footer-col a {
      display: block;
      font-size: 14px;
      padding: 4px 0;
      color: rgba(255, 255, 255, 0.72);
      transition: all 0.2s ease;
    }
    .footer-col a:hover {
      color: #fff;
      padding-left: 4px;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding: 20px 0;
      text-align: center;
      font-size: 13px;
      color: rgba(255, 255, 255, 0.5);
    }

    /* ===== Responsive ===== */
    @media (max-width: 1024px) {
      .site-header { height: 62px; }
      .btn-header { display: none; }
      .nav-toggle { display: inline-flex; }
      .main-nav {
        position: fixed;
        top: 62px;
        left: 0;
        right: 0;
        background: var(--surface);
        flex-direction: column;
        align-items: stretch;
        gap: 4px;
        padding: 16px;
        box-shadow: var(--shadow-lg);
        display: none;
        max-height: calc(100vh - 62px);
        overflow-y: auto;
      }
      .main-nav.open { display: flex; }
      .nav-link {
        font-size: 16px;
        padding: 14px 16px;
        border-radius: 8px;
      }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .cta-banner h2 { font-size: 26px; }
    }

    @media (max-width: 768px) {
      .article-title { font-size: 32px; }
      .article-banner { padding: 44px 0 36px; }
      .article-meta { gap: 12px; }
      .grid-x.small-up-1 > .cell { margin-bottom: 16px; }
    }

    @media (max-width: 640px) {
      .site-header .container { padding: 0 16px; gap: 12px; }
      .logo { font-size: 17px; }
      .container { padding: 0 16px; }
      .container-narrow { padding: 0 16px; }
      .article-body { padding: 24px 20px; }
      .article-title { font-size: 28px; }
      .section-title { font-size: 24px; }
      .related-section { padding: 56px 0; }
      .cta-banner { padding: 56px 0; }
      .cta-actions { flex-direction: column; align-items: center; }
      .cta-actions .btn { width: 100%; max-width: 320px; }
      .footer-grid { grid-template-columns: 1fr; gap: 32px; }
      .site-footer { padding: 48px 0 0; }
    }