/* roulang page: index */
:root {
  --primary: #0D9488;
  --primary-dark: #0C4A3E;
  --accent: #F59E0B;
  --accent-dark: #D97706;
  --dark: #0C2F2B;
  --bg: #F7F8F8;
  --text: #3F4A49;
  --text-light: #6B7280;
  --border: #E5E9E8;
  --divider: #EDF0EF;
  --white: #FFFFFF;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 10px;
  --shadow: 0 2px 12px rgba(12, 47, 43, 0.08);
  --shadow-hover: 0 8px 24px rgba(12, 47, 43, 0.14);
  --shadow-mega: 0 12px 32px rgba(12, 47, 43, 0.16);
  --gradient-primary: linear-gradient(135deg, #0D9488 0%, #0C4A3E 100%);
  --gradient-cta: linear-gradient(135deg, #F59E0B, #D97706);
  --transition: 0.2s ease;
  --container: 1200px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px; line-height: 1.75; color: var(--text); background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
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; cursor: pointer; border: none; background: none; }
input, textarea, select { font-family: inherit; }
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
section { padding: 80px 0; }

/* ===== 导航 ===== */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: var(--white); border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 8px rgba(12, 47, 43, 0.04);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px; position: relative;
}
.logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-icon {
  width: 38px; height: 38px; border-radius: 10px;
  background: var(--gradient-primary);
  color: #fff; font-weight: 700; font-size: 16px;
  display: flex; align-items: center; justify-content: center;
  letter-spacing: -0.5px;
}
.logo-text { font-size: 20px; font-weight: 700; color: var(--dark); }
.main-nav { display: flex; align-items: center; }
.nav-list { display: flex; align-items: center; gap: 4px; }
.nav-item { position: relative; }
.nav-link {
  display: block; padding: 10px 16px; font-size: 15px; font-weight: 500;
  color: var(--text); border-radius: 8px; transition: all var(--transition);
  position: relative;
}
.nav-link::after {
  content: ''; position: absolute; left: 16px; right: 16px; bottom: 2px;
  height: 4px; border-radius: 4px 4px 0 0;
  background: var(--gradient-primary); opacity: 0; transition: opacity var(--transition);
}
.nav-item.active .nav-link { color: var(--primary); font-weight: 600; }
.nav-item.active .nav-link::after { opacity: 1; }
.nav-item:hover .nav-link { color: var(--primary); }
.nav-item:hover .nav-link::after { opacity: 1; }
.has-mega .mega-trigger i { font-size: 12px; margin-left: 4px; transition: transform var(--transition); }
.has-mega:hover .mega-trigger i { transform: rotate(180deg); }

.mega-panel {
  position: absolute; right: 0; top: calc(100% + 12px);
  width: 720px; background: var(--white); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-mega); border: 1px solid var(--border);
  opacity: 0; visibility: hidden; transform: translateY(-8px);
  transition: all 0.25s ease; z-index: 200;
}
.mega-panel::before {
  content: ''; position: absolute; top: 0; left: 24px; right: 24px; height: 4px;
  background: var(--gradient-primary); border-radius: 4px 4px 0 0;
}
.mega-panel::after {
  content: ''; position: absolute; top: -14px; right: 60px;
  border: 7px solid transparent; border-bottom-color: var(--white);
}
.has-mega:hover .mega-panel {
  opacity: 1; visibility: visible; transform: translateY(0);
}
.mega-inner { padding: 24px; }
.mega-cols { display: grid; grid-template-columns: 1fr 1.2fr; gap: 24px; }
.mega-col { padding-right: 24px; border-right: 1px solid var(--divider); }
.mega-col:last-child { padding-right: 0; border-right: none; padding-left: 8px; }
.mega-title {
  font-size: 13px; font-weight: 600; text-transform: uppercase;
  color: var(--text-light); margin-bottom: 16px; letter-spacing: 1px;
}
.mega-links { display: flex; flex-direction: column; gap: 8px; }
.mega-link {
  display: flex; align-items: center; gap: 10px; padding: 10px 14px;
  border-radius: var(--radius-sm); font-size: 14px; color: var(--text);
  background: transparent; transition: all var(--transition);
}
.mega-link:hover { background: #F0FDFA; color: var(--primary); }
.mega-link i:first-child { color: var(--primary); width: 20px; text-align: center; }
.mega-link .arrow { margin-left: auto; font-size: 12px; opacity: 0; transition: opacity var(--transition); }
.mega-link:hover .arrow { opacity: 1; }
.mega-news-list { display: flex; flex-direction: column; gap: 12px; }
.mega-news-item {
  display: flex; align-items: center; gap: 12px; padding: 8px 10px;
  border-radius: var(--radius-sm); transition: background var(--transition);
}
.mega-news-item:hover { background: #F8FAFA; }
.mega-news-thumb {
  width: 56px; height: 56px; border-radius: 8px; overflow: hidden; flex-shrink: 0;
  background: rgba(13, 148, 136, 0.1); border: 1px dashed rgba(13, 148, 136, 0.4);
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; color: var(--text-light);
}
.mega-news-thumb img { width: 100%; height: 100%; object-fit: cover; }
.mega-news-info { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.mega-news-title {
  font-size: 14px; font-weight: 600; color: var(--text);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.mega-news-date { font-size: 12px; color: var(--text-light); }
.mega-empty { font-size: 14px; color: var(--text-light); padding: 12px 0; }
.mega-bottom { margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--divider); }
.mega-banner {
  display: flex; align-items: center; gap: 14px;
  background: rgba(245, 158, 11, 0.08); border-radius: var(--radius-md);
  padding: 14px 18px; transition: background var(--transition);
}
.mega-banner:hover { background: rgba(245, 158, 11, 0.14); }
.mega-banner-icon {
  width: 36px; height: 36px; border-radius: 10px;
  background: var(--gradient-cta); color: #fff;
  display: flex; align-items: center; justify-content: center; font-size: 16px;
  flex-shrink: 0;
}
.mega-banner-text { font-size: 14px; color: var(--dark); flex: 1; }
.mega-banner-text b { color: var(--accent-dark); font-size: 15px; }
.mega-banner-arrow { color: var(--accent-dark); font-size: 14px; }

.header-actions { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-size: 16px; font-weight: 600; padding: 14px 32px;
  border-radius: var(--radius-md); transition: all var(--transition);
  border: none; cursor: pointer; line-height: 1.2;
}
.btn-primary {
  background: var(--gradient-cta); color: #fff;
  box-shadow: 0 2px 8px rgba(245, 158, 11, 0.3);
}
.btn-primary:hover {
  color: #fff; transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(245, 158, 11, 0.4);
}
.btn-primary:active { transform: translateY(1px); }
.btn-primary:focus-visible {
  outline: 3px solid rgba(13, 148, 136, 0.35); outline-offset: 2px;
}
.btn-secondary {
  background: var(--white); color: var(--primary);
  border: 1px solid #D1D5DB;
}
.btn-secondary:hover {
  border-color: var(--primary); color: var(--primary);
  background: #F0FDFA; transform: translateY(-1px);
}
.btn-secondary:active { transform: translateY(1px); }
.btn-secondary:focus-visible {
  outline: 3px solid rgba(13, 148, 136, 0.3); outline-offset: 2px;
}
.btn-sm { font-size: 14px; padding: 9px 18px; }
.btn-lg { font-size: 17px; padding: 16px 40px; }
.hamburger { display: none; font-size: 22px; color: var(--dark); padding: 8px; }
.mobile-nav {
  display: none; position: fixed; top: 64px; left: 0; right: 0; z-index: 99;
  background: var(--white); border-bottom: 1px solid var(--border);
  box-shadow: 0 8px 24px rgba(12, 47, 43, 0.08);
  padding: 16px 24px; flex-direction: column; gap: 4px;
}
.mobile-nav.open { display: flex; }
.mobile-link {
  padding: 12px 16px; border-radius: var(--radius-sm);
  font-size: 15px; font-weight: 500; color: var(--text);
  transition: all var(--transition);
}
.mobile-link:hover { background: #F0FDFA; color: var(--primary); }
.mobile-link.active { background: rgba(13, 148, 136, 0.08); color: var(--primary); font-weight: 600; }

/* ===== Hero ===== */
.hero {
  background: var(--gradient-primary); position: relative; overflow: hidden;
  padding: 96px 0 88px; color: #fff;
}
.hero::before {
  content: ''; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 36px 36px; pointer-events: none;
}
.hero::after {
  content: ''; position: absolute; right: -120px; top: -120px;
  width: 400px; height: 400px; border-radius: 50%;
  background: rgba(255,255,255,0.05); pointer-events: none;
}
.hero-inner {
  position: relative; z-index: 2;
  display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 56px;
  align-items: center;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,0.12); border-radius: 999px;
  padding: 6px 16px; font-size: 13px; color: rgba(255,255,255,0.9);
  margin-bottom: 24px; backdrop-filter: blur(4px);
}
.hero-badge i { color: var(--accent); }
.hero-title {
  font-size: 42px; font-weight: 700; line-height: 1.3;
  color: #fff; margin-bottom: 20px; letter-spacing: -0.5px;
}
.hero-title .highlight { color: var(--accent); }
.hero-subtitle {
  font-size: 17px; line-height: 1.75; color: rgba(255,255,255,0.85);
  margin-bottom: 32px; max-width: 480px;
}
.hero-cta { display: flex; align-items: center; gap: 16px; margin-bottom: 40px; flex-wrap: wrap; }
.hero-cta .btn-secondary {
  background: rgba(255,255,255,0.08); border-color: rgba(255,255,255,0.3);
  color: #fff; backdrop-filter: blur(4px);
}
.hero-cta .btn-secondary:hover {
  background: rgba(255,255,255,0.16); border-color: rgba(255,255,255,0.5); color: #fff;
}
.hero-stats {
  display: flex; gap: 16px; flex-wrap: wrap;
}
.stat-item {
  background: rgba(12, 47, 43, 0.55); border-radius: var(--radius-md);
  padding: 18px 28px; text-align: center; min-width: 140px;
  border: 1px solid rgba(255,255,255,0.1); backdrop-filter: blur(4px);
}
.stat-number {
  font-size: 28px; font-weight: 700; color: #fff; font-family: Arial, sans-serif;
  line-height: 1.2;
}
.stat-label {
  font-size: 13px; color: rgba(255,255,255,0.7); margin-top: 4px;
}
.hero-image { position: relative; }
.hero-image-box {
  border-radius: 20px; overflow: hidden;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  box-shadow: 0 24px 64px rgba(0,0,0,0.2);
}
.hero-image-box img { width: 100%; height: 420px; object-fit: cover; }
.hero-image-float {
  position: absolute; bottom: -20px; left: -20px;
  background: var(--white); border-radius: 14px;
  box-shadow: var(--shadow-hover); padding: 14px 20px;
  display: flex; align-items: center; gap: 12px;
}
.hero-float-icon {
  width: 40px; height: 40px; border-radius: 10px;
  background: var(--gradient-primary); color: #fff;
  display: flex; align-items: center; justify-content: center; font-size: 18px;
}
.hero-float-text { font-size: 13px; color: var(--text); }
.hero-float-text b { display: block; font-size: 15px; color: var(--dark); }

/* ===== 板块标题 ===== */
.section-header { margin-bottom: 48px; }
.section-header h2 {
  font-size: 32px; font-weight: 700; color: var(--dark); line-height: 1.35;
  margin-bottom: 12px;
}
.section-header p {
  font-size: 16px; color: var(--text-light); max-width: 560px;
}
.section-header.center { text-align: center; }
.section-header.center p { margin: 0 auto; }
.section-header .view-all {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 14px; font-weight: 600; color: var(--primary);
  padding: 8px 16px; border-radius: 999px; background: rgba(13,148,136,0.06);
  transition: all var(--transition);
}
.section-header .view-all:hover {
  background: rgba(13,148,136,0.12); color: var(--primary-dark);
}

/* ===== 功能价值 ===== */
.features { background: var(--bg); }
.section-header-row {
  display: flex; justify-content: space-between; align-items: flex-end;
  margin-bottom: 48px;
}
.features-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.feature-card {
  background: var(--white); border-radius: var(--radius-lg);
  padding: 32px 28px 28px; position: relative; overflow: hidden;
  box-shadow: var(--shadow); border: 1px solid var(--border);
  transition: all var(--transition);
}
.feature-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--gradient-primary);
}
.feature-card:hover {
  box-shadow: var(--shadow-hover); transform: translateY(-4px);
  border-color: rgba(13,148,136,0.3);
}
.feature-icon {
  width: 56px; height: 56px; border-radius: 14px;
  background: rgba(13,148,136,0.1); color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; margin-bottom: 20px;
}
.feature-card h3 { font-size: 20px; font-weight: 600; color: var(--dark); margin-bottom: 10px; }
.feature-card p { font-size: 14px; color: var(--text-light); line-height: 1.7; }

/* ===== 截图轮播 ===== */
.showcase {
  background: var(--dark); padding: 80px 0;
}
.showcase .section-header h2 { color: #fff; }
.showcase .section-header p { color: rgba(255,255,255,0.6); }
.showcase-container { max-width: 1000px; margin: 0 auto; }
.showcase-tabs {
  display: flex; justify-content: center; gap: 12px; margin-bottom: 32px; flex-wrap: wrap;
}
.tab-btn {
  padding: 10px 24px; border-radius: 999px;
  font-size: 14px; font-weight: 600;
  background: rgba(255,255,255,0.08); color: rgba(255,255,255,0.7);
  border: 1px solid rgba(255,255,255,0.15);
  transition: all var(--transition);
}
.tab-btn:hover { background: rgba(255,255,255,0.14); color: #fff; }
.tab-btn.active {
  background: var(--gradient-primary); color: #fff; border-color: transparent;
  box-shadow: 0 4px 16px rgba(13,148,136,0.3);
}
.showcase-carousel {
  position: relative; background: rgba(255,255,255,0.04);
  border-radius: 20px; padding: 32px; overflow: hidden;
  border: 1px solid rgba(255,255,255,0.08);
}
.carousel-track { overflow: hidden; border-radius: 12px; }
.carousel-slides { display: flex; transition: transform 0.45s ease; }
.carousel-slide { flex-shrink: 0; width: 100%; }
.carousel-slide img {
  width: 100%; height: 420px; object-fit: cover; border-radius: 12px;
}
.carousel-prev, .carousel-next {
  position: absolute; top: 50%; transform: translateY(-50%);
  width: 44px; height: 44px; border-radius: 12px;
  background: var(--white); color: var(--dark);
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; box-shadow: var(--shadow);
  transition: all var(--transition); z-index: 5;
}
.carousel-prev:hover, .carousel-next:hover {
  background: var(--primary); color: #fff;
}
.carousel-prev { left: 16px; }
.carousel-next { right: 16px; }
.carousel-dots {
  display: flex; justify-content: center; gap: 8px; margin-top: 20px;
}
.carousel-dots .dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: rgba(255,255,255,0.3); transition: all var(--transition);
  cursor: pointer;
}
.carousel-dots .dot.active { background: var(--primary); transform: scale(1.2); }
.showcase-caption {
  text-align: center; color: rgba(255,255,255,0.6);
  font-size: 14px; margin-top: 16px;
}

/* ===== 系统要求 ===== */
.requirements { background: var(--bg); }
.req-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.req-card {
  background: var(--white); border-radius: var(--radius-lg);
  padding: 32px; border: 1px solid var(--border);
  box-shadow: var(--shadow); transition: all var(--transition);
}
.req-card:hover { box-shadow: var(--shadow-hover); }
.req-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 24px;
}
.req-header h3 { font-size: 22px; font-weight: 700; color: var(--dark); }
.req-tag {
  font-size: 12px; font-weight: 600; padding: 5px 14px;
  border-radius: 999px; background: rgba(13,148,136,0.1); color: var(--primary);
}
.req-tag.highlight { background: rgba(245,158,11,0.12); color: var(--accent-dark); }
.req-list { display: flex; flex-direction: column; }
.req-item {
  display: flex; justify-content: space-between; padding: 12px 0;
  border-bottom: 1px solid var(--divider);
}
.req-item:last-child { border-bottom: none; }
.req-name { font-size: 14px; color: var(--text-light); }
.req-value { font-size: 14px; color: var(--dark); font-weight: 500; }
.req-note {
  text-align: center; font-size: 14px; color: var(--text-light);
  margin-top: 24px;
}

/* ===== 评价墙 ===== */
.testimonials { background: var(--white); }
.testimonial-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.testimonial-card {
  background: var(--bg); border-radius: var(--radius-lg);
  padding: 28px 24px; border: 1px solid var(--border);
  transition: all var(--transition); position: relative;
}
.testimonial-card:hover {
  box-shadow: var(--shadow-hover); transform: translateY(-4px);
  border-color: rgba(13,148,136,0.25);
}
.quote-icon {
  width: 36px; height: 36px; border-radius: 50%;
  background: rgba(13,148,136,0.1); color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; margin-bottom: 14px;
}
.stars { color: var(--accent); font-size: 14px; margin-bottom: 14px; letter-spacing: 2px; }
.testimonial-text {
  font-size: 14px; color: var(--text); line-height: 1.7; margin-bottom: 16px;
}
.testimonial-author {
  font-size: 12px; color: var(--text-light);
  border-top: 1px solid var(--divider); padding-top: 12px;
}
.testimonials-cta {
  display: flex; justify-content: center; gap: 16px; margin-top: 48px; flex-wrap: wrap;
}
.testimonial-stats {
  display: flex; justify-content: center; gap: 24px; margin-top: 32px; flex-wrap: wrap;
}
.ts-stat {
  background: rgba(13,148,136,0.06); border-radius: var(--radius-md);
  padding: 16px 28px; text-align: center; min-width: 130px;
  border: 1px solid rgba(13,148,136,0.1);
}
.ts-stat .stat-number { color: var(--primary); font-size: 26px; }
.ts-stat .stat-label { color: var(--text-light); font-size: 13px; margin-top: 4px; }

/* ===== 最新资讯 ===== */
.news-section { background: var(--bg); }
.news-list { display: flex; flex-direction: column; gap: 16px; }
.news-item {
  display: flex; align-items: center; gap: 20px;
  background: var(--white); border-radius: var(--radius-lg);
  padding: 20px; border: 1px solid var(--border);
  transition: all var(--transition);
}
.news-item:hover {
  box-shadow: var(--shadow-hover); transform: translateX(4px);
  border-color: rgba(13,148,136,0.25);
}
.news-thumb {
  width: 72px; height: 72px; border-radius: 8px; overflow: hidden; flex-shrink: 0;
  background: rgba(13,148,136,0.1); border: 1px dashed rgba(13,148,136,0.4);
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; color: var(--text-light);
}
.news-thumb img { width: 100%; height: 100%; object-fit: cover; }
.news-content { flex: 1; min-width: 0; }
.news-tag {
  display: inline-block; font-size: 12px; font-weight: 600;
  color: var(--primary); background: rgba(13,148,136,0.08);
  padding: 3px 10px; border-radius: 999px; margin-bottom: 6px;
}
.news-content h3 {
  font-size: 16px; font-weight: 600; color: var(--dark);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  margin-bottom: 4px;
}
.news-content p {
  font-size: 14px; color: var(--text-light); line-height: 1.6;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  overflow: hidden; margin-bottom: 6px;
}
.news-meta {
  display: flex; justify-content: space-between; align-items: center;
  font-size: 12px; color: var(--text-light);
}
.read-more { font-size: 13px; color: var(--primary); font-weight: 500; }
.read-more i { font-size: 12px; margin-left: 4px; transition: transform var(--transition); }
.news-item:hover .read-more i { transform: translateX(3px); }
.empty-state {
  text-align: center; padding: 60px 20px;
  background: var(--white); border-radius: var(--radius-lg);
  border: 1px dashed var(--border);
}
.empty-icon {
  width: 56px; height: 56px; border-radius: 50%;
  background: rgba(13,148,136,0.1); color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; margin: 0 auto 16px;
}
.empty-state p { font-size: 15px; color: var(--text-light); }

/* ===== FAQ ===== */
.faq-section { background: var(--white); }
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: var(--bg); border-radius: var(--radius-lg);
  border: 1px solid var(--border); margin-bottom: 12px;
  transition: all var(--transition); overflow: hidden;
}
.faq-item.active {
  border-color: rgba(13,148,136,0.35); box-shadow: var(--shadow);
}
.faq-question {
  display: flex; justify-content: space-between; align-items: center;
  padding: 22px 24px; cursor: pointer; user-select: none;
}
.faq-question h3 { font-size: 16px; font-weight: 600; color: var(--dark); }
.faq-icon {
  width: 28px; height: 28px; border-radius: 8px; flex-shrink: 0;
  background: rgba(13,148,136,0.1); color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; transition: all 0.3s ease;
}
.faq-item.active .faq-icon {
  background: var(--primary); color: #fff; transform: rotate(135deg);
}
.faq-answer {
  max-height: 0; overflow: hidden; padding: 0 24px;
  transition: max-height 0.35s ease, padding 0.35s ease;
}
.faq-item.active .faq-answer {
  max-height: 300px; padding: 0 24px 22px;
}
.faq-answer p {
  font-size: 14px; color: var(--text-light); line-height: 1.7;
  border-top: 1px solid var(--divider); padding-top: 16px;
}

/* ===== CTA ===== */
.cta-section { background: var(--gradient-primary); position: relative; overflow: hidden; }
.cta-section::before {
  content: ''; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 32px 32px;
}
.cta-inner {
  position: relative; z-index: 2; text-align: center; padding: 40px 0;
}
.cta-inner h2 {
  font-size: 34px; font-weight: 700; color: #fff; margin-bottom: 16px;
}
.cta-inner p {
  font-size: 16px; color: rgba(255,255,255,0.8);
  max-width: 560px; margin: 0 auto 36px;
}
.cta-buttons { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
.cta-buttons .btn-primary {
  background: var(--gradient-cta); color: #fff;
}
.cta-buttons .btn-secondary {
  background: rgba(255,255,255,0.08); border-color: rgba(255,255,255,0.3);
  color: #fff;
}
.cta-buttons .btn-secondary:hover {
  background: rgba(255,255,255,0.16); border-color: rgba(255,255,255,0.5);
}

/* ===== 页脚 ===== */
.site-footer { background: var(--dark); color: #B8D4CF; }
.footer-main { padding: 64px 0 40px; }
.footer-grid { display: grid; grid-template-columns: 1.2fr 0.8fr 1fr; gap: 48px; }
.footer-brand .logo-text { color: #fff; }
.footer-brand .logo-icon { background: var(--gradient-primary); }
.footer-brand p {
  font-size: 14px; color: rgba(255,255,255,0.6);
  margin-top: 16px; line-height: 1.7;
}
.footer-title {
  font-size: 16px; font-weight: 600; color: #fff; margin-bottom: 16px;
}
.footer-links { display: flex; flex-direction: column; gap: 8px; }
.footer-links a {
  font-size: 14px; color: rgba(255,255,255,0.6);
  transition: all var(--transition);
}
.footer-links a:hover { color: #fff; padding-left: 4px; }
.footer-contact { display: flex; flex-direction: column; gap: 8px; }
.footer-contact span {
  font-size: 14px; color: rgba(255,255,255,0.6);
  display: flex; align-items: center; gap: 8px;
}
.footer-contact i { color: rgba(13,148,136,0.8); width: 16px; text-align: center; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 20px 0;
}
.footer-bottom .container {
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 8px;
}
.footer-bottom span { font-size: 13px; color: rgba(255,255,255,0.4); }
.footer-bottom a { font-size: 13px; color: rgba(255,255,255,0.4); }
.footer-bottom a:hover { color: #fff; }

/* ===== 响应式 ===== */
@media (max-width: 1023px) {
  section { padding: 56px 0; }
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-image { max-width: 560px; }
  .features-grid { grid-template-columns: 1fr 1fr; }
  .feature-card:last-child { grid-column: span 2; }
  .testimonial-grid { grid-template-columns: 1fr 1fr; }
  .req-grid { grid-template-columns: 1fr; }
  .mega-panel { width: 620px; }
  .main-nav { display: none; }
  .hamburger { display: block; }
  .mobile-nav { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .section-header-row { flex-direction: column; gap: 16px; align-items: flex-start; }
}
@media (max-width: 640px) {
  section { padding: 40px 0; }
  .container { padding: 0 16px; }
  .hero { padding: 64px 0 56px; }
  .hero-title { font-size: 30px; }
  .hero-subtitle { font-size: 15px; }
  .hero-stats { flex-direction: column; gap: 12px; }
  .stat-item { width: 100%; }
  .features-grid { grid-template-columns: 1fr; }
  .feature-card:last-child { grid-column: span 1; }
  .testimonial-grid { grid-template-columns: 1fr; }
  .section-header h2 { font-size: 26px; }
  .carousel-slide img { height: 220px; }
  .carousel-prev, .carousel-next { width: 36px; height: 36px; font-size: 14px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom .container { flex-direction: column; text-align: center; }
  .btn { width: 100%; }
  .hero-cta { flex-direction: column; gap: 12px; }
  .hero-cta .btn { width: 100%; }
  .cta-buttons { flex-direction: column; }
  .cta-buttons .btn { width: 100%; }
  .news-item { flex-direction: column; align-items: flex-start; padding: 16px; }
  .news-thumb { width: 100%; height: 140px; }
  .news-content h3 { white-space: normal; }
  .hero-image-box img { height: 260px; }
  .hero-image-float { left: 8px; bottom: -16px; }
  .nav-item .nav-link { padding: 8px 12px; }
  .testimonials-cta { flex-direction: column; }
  .testimonial-stats { flex-direction: column; }
  .ts-stat { width: 100%; }
}
@media (min-width: 641px) and (max-width: 1023px) {
  .mega-panel { width: 90vw; right: 5vw; }
}

/* roulang page: category1 */
:root {
  --primary: #0D9488;
  --primary-dark: #0C4A3E;
  --accent: #F59E0B;
  --accent-dark: #D97706;
  --dark-bg: #0C2F2B;
  --bg-soft: #F7F8F8;
  --text-main: #3F4A49;
  --text-sub: #6B7280;
  --border-soft: #E5E9E8;
  --divider: #EDF0EF;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 10px;
  --shadow-soft: 0 2px 12px rgba(12, 47, 43, 0.08);
  --shadow-hover: 0 8px 24px rgba(12, 47, 43, 0.14);
  --gradient-brand: linear-gradient(135deg, #0D9488 0%, #0C4A3E 100%);
  --gradient-cta: linear-gradient(135deg, #F59E0B, #D97706);
  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

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

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

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

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

ul, ol {
  list-style: none;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

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

.section {
  padding: 80px 0;
}

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

.section-header h2 {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--dark-bg);
  margin-bottom: 12px;
}

.section-header p {
  max-width: 640px;
  margin: 0 auto;
  color: var(--text-sub);
  font-size: 15px;
  line-height: 1.75;
}

.section-header .section-line {
  width: 48px;
  height: 4px;
  border-radius: 999px;
  background: var(--gradient-brand);
  margin: 16px auto 0;
}

/* ===== Header ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  background: #ffffff;
  border-bottom: 1px solid var(--border-soft);
  z-index: 999;
}

.site-header .container {
  height: 100%;
}

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

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

.logo-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-brand);
  color: #ffffff;
  font-weight: 700;
  font-size: 16px;
  border-radius: 10px;
  letter-spacing: 0.5px;
  flex-shrink: 0;
}

.logo-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--dark-bg);
  letter-spacing: 0.5px;
}

/* ===== Navigation ===== */
.main-nav {
  display: flex;
  align-items: center;
}

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

.nav-item {
  position: relative;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-main);
  border-radius: var(--radius-sm);
  position: relative;
  transition: all 0.2s ease;
}

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

.nav-item.active .nav-link {
  color: var(--primary);
  font-weight: 600;
}

.nav-item.active .nav-link::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 2px;
  height: 4px;
  border-radius: 999px;
  background: var(--gradient-brand);
}

.nav-link i {
  font-size: 13px;
}

/* Mega Menu */
.has-mega {
  position: relative;
}

.mega-panel {
  position: absolute;
  top: calc(100% + 12px);
  right: 0;
  width: 720px;
  background: #ffffff;
  border-radius: var(--radius-lg);
  box-shadow: 0 12px 32px rgba(12, 47, 43, 0.16);
  padding: 24px;
  display: none;
  z-index: 1000;
}

.mega-panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  background: var(--gradient-brand);
}

.mega-panel.open {
  display: block;
}

.mega-inner {
  margin-top: 4px;
}

.mega-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.mega-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-sub);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.mega-title i {
  color: var(--primary);
  font-size: 15px;
}

.mega-links {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
}

.mega-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-size: 14px;
  transition: background 0.2s ease;
}

.mega-link:hover {
  background: #F0FDFA;
  color: var(--primary);
}

.mega-link i:first-child {
  color: var(--primary);
  width: 20px;
  text-align: center;
}

.mega-link .arrow {
  margin-left: auto;
  font-size: 12px;
  opacity: 0.6;
}

.mega-news-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mega-news-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px;
  border-radius: var(--radius-sm);
  transition: background 0.2s ease;
}

.mega-news-item:hover {
  background: #F0FDFA;
}

.mega-news-thumb {
  width: 56px;
  height: 56px;
  border-radius: 8px;
  background: rgba(13, 148, 136, 0.1);
  border: 1px dashed rgba(13, 148, 136, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 12px;
  flex-shrink: 0;
}

.mega-news-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.mega-news-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 200px;
}

.mega-news-date {
  font-size: 12px;
  color: var(--text-sub);
}

.mega-news-empty {
  font-size: 14px;
  color: var(--text-sub);
  padding: 12px 0;
}

.mega-news-card {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 14px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  background: #FEF3C7;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent-dark);
}

.mega-news-card:hover {
  background: #FDE68A;
  color: var(--accent-dark);
}

.mega-version {
  margin-left: auto;
  font-size: 14px;
  font-weight: 700;
  color: var(--accent-dark);
  background: #ffffff;
  padding: 2px 10px;
  border-radius: 999px;
}

/* Mobile Toggle */
.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

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

/* ===== Hero ===== */
.hero {
  position: relative;
  padding: 140px 0 80px;
  background: var(--gradient-brand);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 36px 36px;
}

.hero::after {
  content: "";
  position: absolute;
  right: -140px;
  bottom: -140px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
}

.hero .container {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
  align-items: center;
}

.hero-content {
  max-width: 560px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 999px;
  color: #ffffff;
  font-size: 14px;
  margin-bottom: 24px;
  backdrop-filter: blur(4px);
}

.hero-badge i {
  color: var(--accent);
  font-size: 14px;
}

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

.hero-sub {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.75;
  margin-bottom: 32px;
}

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

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: var(--gradient-cta);
  color: #ffffff;
  font-size: 16px;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 4px 14px rgba(217, 119, 6, 0.35);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #FBBF24, #D97706);
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(217, 119, 6, 0.4);
  color: #ffffff;
}

.btn-primary:active {
  transform: translateY(2px);
  box-shadow: 0 2px 6px rgba(217, 119, 6, 0.3);
}

.btn-primary:focus-visible,
.btn-secondary:focus-visible {
  outline: 3px solid rgba(13, 148, 136, 0.4);
  outline-offset: 2px;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: transparent;
  color: #ffffff;
  font-size: 16px;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.5);
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: #ffffff;
  color: #ffffff;
}

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

.hero-stats {
  display: flex;
  align-items: center;
  gap: 30px;
}

.hero-stat-item {
  display: flex;
  flex-direction: column;
  background: rgba(12, 47, 43, 0.75);
  padding: 12px 20px;
  border-radius: var(--radius-md);
  backdrop-filter: blur(4px);
}

.hero-stat-item .stat-num {
  font-size: 24px;
  font-weight: 700;
  color: #ffffff;
  line-height: 1.3;
}

.hero-stat-item .stat-label {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.65);
}

.hero-visual {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 16px 40px rgba(12, 47, 43, 0.28);
  aspect-ratio: 4/3;
  background: linear-gradient(135deg, rgba(255,255,255,0.15) 0%, rgba(255,255,255,0.05) 100%);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.85;
}

.hero-visual-caption {
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 16px;
  background: rgba(12, 47, 43, 0.85);
  backdrop-filter: blur(4px);
  color: #ffffff;
  font-size: 14px;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
}

/* ===== Feature Cards ===== */
.feature-section {
  background: #ffffff;
}

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

.feature-card {
  position: relative;
  background: var(--bg-soft);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-soft);
  padding: 24px;
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  background: var(--gradient-brand);
}

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

.feature-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(13, 148, 136, 0.1);
  color: var(--primary);
  font-size: 20px;
  border-radius: var(--radius-md);
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--dark-bg);
  margin-bottom: 10px;
}

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

/* ===== Showcase / Alternating ===== */
.showcase-section {
  background: var(--bg-soft);
}

.showcase-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-bottom: 80px;
}

.showcase-item:last-child {
  margin-bottom: 0;
}

.showcase-item.reverse .showcase-media {
  order: 2;
}

.showcase-item.reverse .showcase-text {
  order: 1;
}

.showcase-media {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-hover);
  aspect-ratio: 16/10;
  background: rgba(13, 148, 136, 0.08);
  border: 1px dashed rgba(13, 148, 136, 0.3);
}

.showcase-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.showcase-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(13, 148, 136, 0.1);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 16px;
}

.showcase-text h3 {
  font-size: 24px;
  font-weight: 700;
  color: var(--dark-bg);
  margin-bottom: 16px;
  line-height: 1.4;
}

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

.showcase-features {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.showcase-features span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-main);
  background: #ffffff;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--border-soft);
}

.showcase-features span i {
  color: var(--primary);
  font-size: 12px;
}

/* ===== Scenarios ===== */
.scenario-section {
  background: #ffffff;
}

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

.scenario-card {
  background: var(--bg-soft);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  text-align: center;
  border: 1px solid var(--border-soft);
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}

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

.scenario-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  background: var(--gradient-brand);
  color: #ffffff;
  font-size: 22px;
  border-radius: var(--radius-md);
}

.scenario-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--dark-bg);
  margin-bottom: 10px;
}

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

/* ===== Stats ===== */
.stats-section {
  position: relative;
  background: var(--dark-bg);
  overflow: hidden;
}

.stats-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 32px 32px;
}

.stats-section .container {
  position: relative;
  z-index: 2;
}

.stats-grid {
  display: flex;
  justify-content: center;
  gap: 60px;
  flex-wrap: wrap;
}

.stat-box {
  text-align: center;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-lg);
  padding: 32px 40px;
  min-width: 200px;
}

.stat-box .stat-num {
  font-size: 36px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 6px;
  line-height: 1.2;
}

.stat-box .stat-label {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
}

/* ===== Notice Bar ===== */
.notice-section {
  background: var(--bg-soft);
  padding: 0 0 80px;
}

.notice-bar {
  background: rgba(13, 148, 136, 0.08);
  border: 1px solid rgba(13, 148, 136, 0.15);
  border-radius: var(--radius-lg);
  padding: 24px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.notice-bar p {
  color: var(--primary-dark);
  font-size: 15px;
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
}

.notice-bar p i {
  font-size: 18px;
}

.notice-bar a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary);
  font-weight: 600;
  font-size: 14px;
  white-space: nowrap;
}

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

/* ===== FAQ ===== */
.faq-section {
  background: #ffffff;
}

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

.faq-item {
  background: var(--bg-soft);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-soft);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-item-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  cursor: pointer;
  transition: background 0.2s ease;
}

.faq-item-header:hover {
  background: #F0FDFA;
}

.faq-item-header h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  margin: 0;
  padding-right: 16px;
}

.faq-icon {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(13, 148, 136, 0.1);
  color: var(--primary);
  font-size: 16px;
  border-radius: 8px;
  flex-shrink: 0;
  transition: background 0.2s ease, color 0.2s ease, transform 0.3s ease;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-answer-inner {
  padding: 0 24px 20px;
}

.faq-answer-inner p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.7;
  margin: 0;
}

/* ===== CTA ===== */
.cta-section {
  position: relative;
  padding: 80px 0;
  background: var(--gradient-brand);
  text-align: center;
  overflow: hidden;
}

.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 32px 32px;
}

.cta-section .container {
  position: relative;
  z-index: 2;
}

.cta-section h2 {
  font-size: 32px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 16px;
}

.cta-section p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 32px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

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

.cta-section .btn-primary {
  min-width: 180px;
}

.cta-section .btn-secondary {
  border-color: rgba(255, 255, 255, 0.6);
}

/* ===== Footer ===== */
.site-footer {
  background: var(--dark-bg);
  color: #B8D4CF;
}

.footer-main {
  padding: 64px 0 40px;
}

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

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

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

.footer-brand p {
  font-size: 14px;
  line-height: 1.75;
  color: #B8D4CF;
  margin: 0;
  max-width: 360px;
}

.footer-title {
  font-size: 16px;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 20px;
}

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

.footer-links a {
  color: #B8D4CF;
  font-size: 14px;
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: #ffffff;
}

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

.footer-contact span {
  font-size: 14px;
  color: #B8D4CF;
  display: flex;
  align-items: center;
  gap: 10px;
}

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

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

.footer-bottom .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-bottom span {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
}

/* ===== Responsive ===== */
@media (max-width: 1023px) {
  .hero .container {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-visual {
    max-width: 560px;
  }

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

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

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

  .showcase-item.reverse .showcase-media {
    order: 0;
  }

  .showcase-item.reverse .showcase-text {
    order: 0;
  }

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

  .mega-panel {
    width: 600px;
  }
}

@media (max-width: 767px) {
  .mobile-toggle {
    display: flex;
    z-index: 1002;
  }

  .main-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: #ffffff;
    border-bottom: 1px solid var(--border-soft);
    padding: 16px 24px;
    display: none;
    max-height: calc(100vh - 64px);
    overflow-y: auto;
    box-shadow: 0 12px 24px rgba(12, 47, 43, 0.1);
  }

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

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav-item.active .nav-link::after {
    display: none;
  }

  .nav-link {
    padding: 14px 12px;
    border-bottom: 1px solid var(--divider);
    width: 100%;
  }

  .mega-panel {
    position: static;
    width: 100%;
    box-shadow: none;
    border: 1px solid var(--border-soft);
    margin: 8px 0;
    padding: 16px;
  }

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

  .mega-panel::before {
    display: none;
  }

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

  .section {
    padding: 56px 0;
  }

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

  .hero {
    padding: 110px 0 56px;
  }

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

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

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

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

  .stats-grid {
    gap: 20px;
    flex-direction: column;
    align-items: center;
  }

  .stat-box {
    width: 100%;
    max-width: 280px;
  }

  .notice-bar {
    flex-direction: column;
    align-items: flex-start;
  }

  .cta-section {
    padding: 56px 0;
  }

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

  .cta-actions {
    flex-direction: column;
    width: 100%;
    max-width: 280px;
    margin: 0 auto;
  }

  .cta-actions .btn-primary,
  .cta-actions .btn-secondary {
    width: 100%;
    justify-content: center;
  }

  .hero-stats {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .hero-stat-item {
    width: 100%;
  }
}

@media (max-width: 520px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .logo-text {
    font-size: 18px;
  }

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

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

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

  .showcase-text h3 {
    font-size: 20px;
  }

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

/* roulang page: article */
:root {
  --primary: #0D9488;
  --primary-dark: #0C4A3E;
  --accent: #F59E0B;
  --accent-dark: #D97706;
  --ink: #0C2F2B;
  --bg: #F7F8F8;
  --text: #3F4A49;
  --text-light: #6B7280;
  --border: #E5E9E8;
  --divider: #EDF0EF;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 10px;
  --shadow: 0 2px 12px rgba(12, 47, 43, 0.08);
  --shadow-hover: 0 8px 24px rgba(12, 47, 43, 0.14);
  --gradient: linear-gradient(135deg, #0D9488 0%, #0C4A3E 100%);
  --gradient-cta: linear-gradient(135deg, #F59E0B, #D97706);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease; }
img { max-width: 100%; height: auto; }
ul, ol, p, h1, h2, h3, h4, h5, h6 { margin: 0; padding: 0; }
button { border: none; background: none; font: inherit; cursor: pointer; }

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

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1;
  border: 1px solid transparent;
  transition: all 0.2s ease;
  cursor: pointer;
}
.btn-primary {
  background: var(--gradient-cta);
  color: #fff;
  box-shadow: 0 4px 14px rgba(245, 158, 11, 0.3);
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(245, 158, 11, 0.4);
  color: #fff;
}
.btn-primary:active { transform: translateY(0); box-shadow: 0 2px 8px rgba(245, 158, 11, 0.3); }
.btn-primary:focus { outline: 2px solid var(--primary); outline-offset: 2px; }
.btn-secondary {
  background: #fff;
  border-color: #D1D5DB;
  color: var(--primary);
}
.btn-secondary:hover { border-color: var(--primary); background: #F0FDFA; color: var(--primary); }
.btn-lg { padding: 16px 40px; font-size: 17px; }

/* 站点头部导航 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.98);
  border-bottom: 1px solid var(--border);
  height: 64px;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  position: relative;
}
.logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: var(--gradient);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 16px;
  font-family: Arial, sans-serif;
}
.logo-text { font-size: 20px; font-weight: 700; color: var(--ink); }

.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--ink);
  border: 1px solid var(--border);
}
.main-nav .nav-list {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 4px;
  margin: 0;
}
.nav-item { position: relative; }
.nav-link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 16px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  transition: color 0.2s ease;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 0;
  height: 4px;
  border-radius: 4px;
  background: var(--gradient);
  opacity: 0;
  transform: scaleX(0.5);
  transition: opacity 0.2s ease, transform 0.2s ease;
}
.nav-item.active .nav-link,
.nav-link:hover { color: var(--primary); }
.nav-item.active .nav-link::after,
.nav-link:hover::after { opacity: 1; transform: scaleX(1); }
.nav-link i { font-size: 12px; }

/* Mega 下拉 */
.mega-panel {
  position: absolute;
  top: calc(100% + 14px);
  right: 0;
  width: 720px;
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 12px 32px rgba(12, 47, 43, 0.16);
  border: 1px solid var(--border);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
  z-index: 99;
  overflow: hidden;
}
.mega-panel::before {
  content: "";
  display: block;
  height: 4px;
  background: var(--gradient);
}
.nav-item.has-mega:hover .mega-panel,
.nav-item.has-mega.open .mega-panel {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.mega-inner { padding: 24px; }
.mega-cols { display: flex; gap: 32px; }
.mega-col { flex: 1; min-width: 0; }
.mega-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.mega-links { display: grid; grid-template-columns: 1fr; gap: 8px; }
.mega-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border-radius: 10px;
  background: #F0FDFA;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  transition: background 0.2s ease;
}
.mega-link:hover { background: #D6F5EF; }
.mega-link .arrow { margin-left: auto; font-size: 12px; }
.mega-news-list { display: flex; flex-direction: column; gap: 8px; }
.mega-news-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px;
  border-radius: 10px;
  transition: background 0.2s ease;
}
.mega-news-item:hover { background: #F0FDFA; }
.mega-news-thumb {
  width: 56px;
  height: 56px;
  border-radius: 8px;
  background: rgba(13, 148, 136, 0.1);
  border: 1px dashed rgba(13, 148, 136, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: var(--primary);
  overflow: hidden;
  flex-shrink: 0;
}
.mega-news-thumb img { width: 100%; height: 100%; object-fit: cover; border: none; }
.mega-news-info { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.mega-news-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.4;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 文章顶部区域 */
.article-hero {
  background: linear-gradient(135deg, #F0FDFA 0%, #F7F8F8 100%);
  border-bottom: 1px solid var(--border);
  padding: 48px 0 40px;
}
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 20px;
}
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb i { font-size: 10px; color: #B0B8B7; }
.breadcrumb .current { color: var(--text); font-weight: 500; }
.article-hero h1 {
  font-size: 38px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--ink);
  max-width: 800px;
  margin-bottom: 16px;
}
.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
  font-size: 14px;
  color: var(--text-light);
}
.article-meta span { display: inline-flex; align-items: center; gap: 6px; }
.article-meta .tag {
  background: rgba(13, 148, 136, 0.1);
  color: var(--primary);
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
}

/* 正文 */
.article-body-section { padding: 56px 0 40px; }
.article-body {
  max-width: 800px;
  margin: 0 auto;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
}
.article-body p { margin-bottom: 24px; }
.article-body h2 { font-size: 24px; font-weight: 700; color: var(--ink); margin: 40px 0 16px; }
.article-body h3 { font-size: 20px; font-weight: 600; color: var(--ink); margin: 32px 0 12px; }
.article-body h4 { font-size: 17px; font-weight: 600; color: var(--ink); margin: 24px 0 10px; }
.article-body ul, .article-body ol { margin: 0 0 24px; padding-left: 24px; }
.article-body li { margin-bottom: 8px; }
.article-body img {
  border-radius: 12px;
  background: rgba(13, 148, 136, 0.1);
  border: 1px dashed rgba(13, 148, 136, 0.3);
  margin: 24px 0;
}
.article-body blockquote {
  border-left: 4px solid var(--primary);
  background: #F0FDFA;
  padding: 16px 24px;
  border-radius: 0 12px 12px 0;
  margin: 24px 0;
  color: var(--text);
}
.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: 24px 0;
  background: #fff;
  border-radius: 12px;
  overflow: hidden;
  font-size: 15px;
}
.article-body th, .article-body td { border: 1px solid var(--border); padding: 12px 16px; }
.article-body th { background: #F0FDFA; color: var(--ink); font-weight: 600; }

/* 上一篇 / 下一篇 */
.article-pager {
  max-width: 800px;
  margin: 48px auto 0;
  display: flex;
  gap: 16px;
}
.pager-link {
  flex: 1;
  padding: 20px 24px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.pager-link:hover { border-color: var(--primary); box-shadow: var(--shadow-hover); }
.pager-link.pager-next { text-align: right; }
.pager-link.pager-single {
  flex: 0 1 60%;
  margin: 0 auto;
  text-align: center;
}
.pager-link:only-child { flex: 0 1 60%; margin: 0 auto; }
.pager-label { font-size: 13px; color: var(--text-light); }
.pager-title { font-size: 15px; font-weight: 600; color: var(--ink); line-height: 1.4; }

/* 相关推荐 */
.related-section {
  padding: 56px 0;
  border-top: 1px solid var(--divider);
}
.section-head { text-align: center; margin-bottom: 40px; }
.section-head h2 { font-size: 30px; font-weight: 700; color: var(--ink); }
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.related-card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow);
  height: 100%;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.related-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-3px); }
.related-card img {
  width: 100%;
  height: 170px;
  object-fit: cover;
  border: none;
}
.related-card-body {
  padding: 20px 20px 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.related-card-body h3 { font-size: 18px; font-weight: 600; color: var(--ink); line-height: 1.4; margin-bottom: 10px; }
.related-card-body p { font-size: 14px; color: var(--text-light); line-height: 1.6; flex: 1; margin-bottom: 16px; }
.read-more { font-size: 14px; font-weight: 600; color: var(--primary); }
.read-more i { transition: transform 0.2s ease; }
.related-card:hover .read-more i { transform: translateX(4px); }

/* CTA */
.cta-section {
  background: var(--ink) url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  padding: 72px 0;
  text-align: center;
  position: relative;
}
.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(12, 47, 43, 0.82);
}
.cta-section .grid-container { position: relative; z-index: 1; }
.cta-section h2 { color: #fff; font-size: 32px; font-weight: 700; margin-bottom: 12px; }
.cta-section p { color: rgba(255, 255, 255, 0.85); font-size: 16px; margin-bottom: 32px; }
.cta-buttons { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }

/* 页脚 */
.site-footer {
  background: var(--ink);
  color: #B8D4CF;
  font-size: 14px;
}
.footer-main { padding: 56px 0 40px; }
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
}
.footer-brand .logo { margin-bottom: 16px; }
.footer-brand .logo-text { color: #fff; }
.footer-brand p { line-height: 1.7; max-width: 320px; color: #B8D4CF; margin-top: 12px; }
.footer-title {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
}
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { color: #B8D4CF; }
.footer-links a:hover { color: #fff; }
.footer-contact { display: flex; flex-direction: column; gap: 10px; color: #B8D4CF; }
.footer-contact span { display: flex; align-items: center; gap: 8px; }
.footer-contact i { color: var(--accent); width: 16px; text-align: center; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 20px 0;
  font-size: 13px;
  color: rgba(184, 212, 207, 0.7);
}
.footer-bottom .container { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

/* 内容未找到 */
.not-found-section { padding: 80px 0; }
.not-found-card {
  max-width: 560px;
  margin: 0 auto;
  background: #fff;
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 48px 40px;
  text-align: center;
}
.not-found-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 20px;
  border-radius: 50%;
  background: rgba(13, 148, 136, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  color: var(--primary);
}
.not-found-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 12px;
}
.not-found-card p { color: var(--text-light); margin-bottom: 24px; }

/* 响应式 */
@media (max-width: 1024px) {
  .mega-panel { width: 640px; }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 768px) {
  .menu-toggle { display: flex; }
  .main-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 8px 24px rgba(12, 47, 43, 0.1);
    display: none;
    padding: 16px 24px;
    max-height: calc(100vh - 64px);
    overflow-y: auto;
  }
  .main-nav.open { display: block; }
  .nav-list { flex-direction: column; gap: 4px; }
  .nav-link { padding: 12px 16px; }
  .mega-panel {
    position: static;
    width: 100%;
    box-shadow: none;
    border: 1px solid var(--border);
    margin-top: 8px;
    opacity: 1;
    visibility: visible;
    transform: none;
    display: none;
    border-radius: 12px;
  }
  .nav-item.has-mega.open .mega-panel { display: block; }
  .mega-cols { flex-direction: column; gap: 20px; }
  .article-hero h1 { font-size: 32px; }
  .article-pager { flex-direction: column; }
  .pager-link:only-child, .pager-link.pager-single { flex: 1; max-width: 100%; }
  .cta-section { padding: 56px 0; }
  .cta-section h2 { font-size: 26px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
}

@media (max-width: 520px) {
  .article-hero { padding: 32px 0 28px; }
  .article-hero h1 { font-size: 28px; }
  .article-body-section { padding: 40px 0 28px; }
  .related-section { padding: 40px 0; }
  .related-grid { grid-template-columns: 1fr; }
  .section-head h2 { font-size: 26px; }
  .cta-buttons .btn { width: 100%; }
  .footer-bottom .container { justify-content: center; text-align: center; }
}

/* roulang page: category2 */
:root {
  --primary: #0D9488;
  --primary-dark: #0C4A3E;
  --accent: #F59E0B;
  --accent-dark: #D97706;
  --ink: #0C2F2B;
  --bg: #F7F8F8;
  --text: #3F4A49;
  --text-light: #6B7280;
  --border: #E5E9E8;
  --divider: #EDF0EF;
  --card-bg: #ffffff;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 10px;
  --radius-pill: 999px;
  --shadow-sm: 0 2px 12px rgba(12, 47, 43, 0.08);
  --shadow-md: 0 8px 24px rgba(12, 47, 43, 0.14);
  --shadow-lg: 0 12px 32px rgba(12, 47, 43, 0.16);
  --gradient-primary: linear-gradient(135deg, #0D9488 0%, #0C4A3E 100%);
  --gradient-cta: linear-gradient(135deg, #F59E0B, #D97706);
}

*, *::before, *::after {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
a {
  text-decoration: none;
  color: inherit;
  transition: color 0.2s ease;
}
img {
  max-width: 100%;
  display: block;
  height: auto;
}
button, input, select, textarea {
  font: inherit;
  color: inherit;
}
.grid-container {
  max-width: 1200px;
  padding-left: 24px;
  padding-right: 24px;
}

/* ============ 按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius-md);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.2s ease;
  line-height: 1.4;
}
.btn-primary {
  background: var(--gradient-cta);
  color: #fff;
  box-shadow: 0 4px 12px rgba(245, 158, 11, 0.25);
}
.btn-primary:hover {
  filter: brightness(1.05);
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(245, 158, 11, 0.35);
}
.btn-primary:active {
  transform: translateY(2px);
  box-shadow: 0 2px 6px rgba(245, 158, 11, 0.3);
}
.btn-primary:focus-visible {
  outline: 3px solid rgba(13, 148, 136, 0.4);
  outline-offset: 2px;
}
.btn-secondary {
  background: #fff;
  border: 1px solid #D1D5DB;
  color: var(--primary);
}
.btn-secondary:hover {
  border-color: var(--primary);
  background: #F0FDFA;
  transform: translateY(-1px);
}
.btn-ghost {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.35);
  color: #fff;
}
.btn-ghost:hover {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.12);
}
.btn-lg {
  padding: 18px 42px;
  font-size: 17px;
}
.btn:focus-visible {
  outline: 3px solid rgba(13, 148, 136, 0.35);
  outline-offset: 2px;
}

/* ============ 顶栏 ============ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  background: #fff;
  border-bottom: 1px solid var(--border);
  z-index: 100;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--gradient-primary);
  color: #fff;
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.5px;
}
.logo-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--ink);
  white-space: nowrap;
}

/* ============ 导航 ============ */
.main-nav {
  display: flex;
  align-items: center;
}
.nav-list {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 4px;
  margin: 0;
  padding: 0;
}
.nav-item {
  position: relative;
}
.nav-link {
  display: block;
  padding: 22px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  position: relative;
  transition: color 0.2s ease;
}
.nav-link i.fa-chevron-down {
  font-size: 11px;
  margin-left: 4px;
  transition: transform 0.2s ease;
}
.nav-link::after {
  content: '';
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 0;
  height: 4px;
  border-radius: 6px 6px 0 0;
  background: var(--gradient-primary);
  opacity: 0;
  transform: scaleX(0.6);
  transition: opacity 0.25s, transform 0.25s;
}
.nav-link:hover {
  color: var(--primary);
}
.nav-link:hover::after,
.nav-item.active .nav-link::after {
  opacity: 1;
  transform: scaleX(1);
}
.nav-item.active .nav-link {
  color: var(--primary);
}

/* Mega 面板 */
.nav-item.has-mega.open .mega-trigger i.fa-chevron-down {
  transform: rotate(180deg);
}
.mega-panel {
  position: absolute;
  top: 100%;
  right: 0;
  width: 720px;
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border-top: 4px solid var(--primary);
  padding: 28px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
  z-index: 300;
}
.nav-item.has-mega.open .mega-panel {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.mega-inner {
  width: 100%;
}
.mega-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}
.mega-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.mega-title i {
  color: var(--primary);
}
.mega-links {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.mega-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border-radius: 8px;
  background: #F9FCFB;
  font-size: 14px;
  color: var(--text);
  transition: background 0.2s, color 0.2s;
}
.mega-link > i:first-child {
  color: var(--primary);
  width: 18px;
  text-align: center;
}
.mega-link .arrow {
  margin-left: auto;
  font-size: 12px;
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity 0.2s, transform 0.2s;
}
.mega-link:hover {
  background: #F0FDFA;
  color: var(--primary);
}
.mega-link:hover .arrow {
  opacity: 1;
  transform: translateX(2px);
}
.mega-news-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.mega-news-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px;
  border-radius: 8px;
  transition: background 0.2s;
}
.mega-news-item:hover {
  background: #F9FCFB;
}
.mega-news-thumb {
  width: 56px;
  height: 56px;
  border-radius: 8px;
  background: rgba(13, 148, 136, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: var(--text-light);
  border: 1px dashed rgba(13, 148, 136, 0.3);
  overflow: hidden;
  flex-shrink: 0;
}
.mega-news-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.mega-news-info {
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.mega-news-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.4;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.mega-news-date {
  font-size: 12px;
  color: var(--text-light);
  margin-top: 2px;
}
.mega-empty {
  font-size: 14px;
  color: var(--text-light);
  padding: 12px 0;
}
.mega-entry-card {
  margin-top: 12px;
  background: #FFF7ED;
  border-radius: 10px;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  font-size: 14px;
}
.mega-entry-text {
  font-weight: 600;
  color: var(--ink);
}
.mega-entry-version {
  font-weight: 700;
  color: var(--accent-dark);
  background: #FEEDD2;
  padding: 2px 10px;
  border-radius: 6px;
  font-size: 13px;
}
.mega-entry-card a {
  margin-left: auto;
  color: var(--primary);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  border: none;
  padding: 12px;
  cursor: pointer;
  border-radius: 8px;
  transition: background 0.2s;
}
.nav-toggle:hover {
  background: #F0FDFA;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}
.nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ============ 页面区块间距 ============ */
.section {
  padding: 80px 0;
}
.section-head {
  text-align: center;
  margin-bottom: 48px;
}
.section-tag {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(13, 148, 136, 0.08);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--radius-pill);
}
.section-head h2 {
  font-size: 32px;
  font-weight: 700;
  color: var(--ink);
  margin: 16px 0 8px;
  line-height: 1.35;
}
.section-head p {
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto;
  font-size: 15px;
}

/* ============ Hero ============ */
.version-hero {
  padding: 140px 0 100px;
  background: linear-gradient(135deg, rgba(12, 47, 43, 0.94), rgba(12, 74, 62, 0.9)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  color: #fff;
  position: relative;
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.1);
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  font-size: 13px;
  color: #B8D4CF;
}
.hero-eyebrow::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
}
.version-hero h1 {
  font-size: 42px;
  font-weight: 700;
  color: #fff;
  line-height: 1.3;
  margin: 20px 0 16px;
  max-width: 680px;
}
.version-hero .hero-desc {
  font-size: 18px;
  color: #B8D4CF;
  max-width: 620px;
  margin: 0;
}
.hero-actions {
  display: flex;
  gap: 16px;
  margin-top: 32px;
  flex-wrap: wrap;
}
.hero-stats {
  display: flex;
  gap: 48px;
  margin-top: 48px;
  flex-wrap: wrap;
}
.stat-item {
  display: flex;
  flex-direction: column;
}
.stat-num {
  font-size: 28px;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.5px;
}
.stat-label {
  font-size: 13px;
  color: #8AA8A2;
  margin-top: 4px;
}

/* ============ 时间线 ============ */
.timeline-section {
  padding: 80px 0;
  background: var(--bg);
}
.timeline {
  position: relative;
  max-width: 860px;
  margin: 0 auto;
  padding-left: 56px;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 17px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(to bottom, var(--primary), #D9E2E0);
}
.timeline-item {
  position: relative;
  margin-bottom: 48px;
}
.timeline-item:last-child {
  margin-bottom: 0;
}
.timeline-marker {
  position: absolute;
  left: -56px;
  top: 4px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--gradient-primary);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 3px solid #fff;
  box-shadow: var(--shadow-sm);
  z-index: 2;
}
.timeline-item.latest .timeline-marker {
  background: var(--gradient-cta);
}
.timeline-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  border-left: 4px solid var(--primary);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.timeline-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.timeline-item.latest .timeline-card {
  border-left-color: var(--accent);
  box-shadow: var(--shadow-md);
}
.tl-card-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  gap: 16px;
  flex-wrap: wrap;
}
.tl-version {
  font-size: 24px;
  font-weight: 700;
  color: var(--ink);
  margin: 0;
}
.tl-date {
  font-size: 13px;
  color: var(--text-light);
  display: flex;
  align-items: center;
  gap: 6px;
}
.tl-badge {
  display: inline-block;
  background: #FFF7ED;
  color: var(--accent-dark);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  margin-bottom: 12px;
}
.tl-changelog {
  list-style: none;
  padding: 0;
  margin: 0;
}
.tl-changelog li {
  position: relative;
  padding: 6px 0 6px 18px;
  font-size: 15px;
  color: var(--text);
  line-height: 1.7;
}
.tl-changelog li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 17px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
}

/* ============ 更新承诺 ============ */
.policy-section {
  padding: 80px 0;
  background: #fff;
}
.policy-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  height: 100%;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.policy-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  border-color: rgba(13, 148, 136, 0.2);
}
.policy-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: rgba(13, 148, 136, 0.1);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 20px;
}
.policy-card h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 12px;
}
.policy-card p {
  font-size: 14px;
  color: var(--text-light);
  margin: 0;
  line-height: 1.7;
}

/* ============ 下载 CTA ============ */
.download-section {
  padding: 80px 0;
  background: linear-gradient(135deg, #0C2F2B, #0C4A3E);
  position: relative;
  overflow: hidden;
}
.download-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  opacity: 0.08;
}
.download-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  z-index: 1;
}
.download-info {
  color: #fff;
}
.dl-badge {
  display: inline-block;
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  font-size: 13px;
  font-weight: 500;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  margin-bottom: 20px;
}
.download-info h2 {
  font-size: 32px;
  color: #fff;
  margin: 0 0 16px;
  line-height: 1.35;
}
.download-info p {
  color: #B8D4CF;
  font-size: 15px;
  margin: 0;
}
.dl-actions {
  display: flex;
  gap: 16px;
  margin-top: 32px;
  flex-wrap: wrap;
}
.download-visual {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 20px;
  padding: 20px;
}
.download-visual img {
  border-radius: 12px;
  width: 100%;
}

/* ============ FAQ ============ */
.faq-section {
  padding: 80px 0;
  background: var(--bg);
}
.faq-grid {
  max-width: 840px;
  margin: 0 auto;
}
.faq-item {
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  margin-bottom: 16px;
  overflow: hidden;
  transition: box-shadow 0.2s ease;
}
.faq-item.active {
  box-shadow: var(--shadow-md);
}
.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  transition: background 0.2s;
}
.faq-question:hover {
  background: #F9FCFB;
}
.faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: rgba(13, 148, 136, 0.1);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 700;
  transition: background 0.2s, color 0.2s, transform 0.2s;
  flex-shrink: 0;
}
.faq-item.active .faq-icon {
  background: var(--primary);
  color: #fff;
  transform: rotate(45deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}
.faq-answer-inner {
  padding: 0 24px 20px;
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
}

/* ============ 页脚 ============ */
.site-footer {
  background: var(--ink);
  color: #B8D4CF;
}
.footer-main {
  padding: 60px 0 40px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.5fr;
  gap: 48px;
}
.footer-brand .logo {
  margin-bottom: 0;
}
.footer-brand p {
  font-size: 14px;
  color: #8AA8A2;
  max-width: 280px;
  margin-top: 16px;
  line-height: 1.7;
}
.footer-title {
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-links a {
  color: #B8D4CF;
  font-size: 14px;
  transition: color 0.2s;
}
.footer-links a:hover {
  color: #fff;
}
.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 14px;
}
.footer-contact i {
  margin-right: 8px;
  color: var(--primary);
  width: 16px;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: #8AA8A2;
  gap: 12px;
  flex-wrap: wrap;
}

/* ============ 响应式 ============ */
@media (max-width: 1023px) {
  .mega-panel {
    width: 640px;
  }
  .mega-cols {
    gap: 20px;
  }
  .download-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .footer-grid {
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 32px;
  }
}

@media (min-width: 641px) and (max-width: 1023px) {
  .nav-link {
    padding: 22px 12px;
    font-size: 14px;
  }
  .mega-panel {
    right: auto;
    left: auto;
    width: 100%;
    max-width: 640px;
  }
}

@media (max-width: 640px) {
  .nav-toggle {
    display: flex;
  }
  .main-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    box-shadow: var(--shadow-md);
    padding: 16px;
    display: none;
    border-bottom: 1px solid var(--border);
  }
  .main-nav.show {
    display: block;
    max-height: calc(100vh - 64px);
    overflow-y: auto;
  }
  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }
  .nav-link {
    padding: 14px 16px;
    border-radius: 8px;
  }
  .nav-link::after {
    display: none;
  }
  .nav-item.active .nav-link {
    background: #F0FDFA;
  }
  .mega-panel {
    position: static;
    width: 100%;
    box-shadow: none;
    border: 1px solid var(--border);
    border-top: 4px solid var(--primary);
    padding: 20px;
    opacity: 1;
    visibility: visible;
    transform: none;
    display: none;
    margin-top: 4px;
  }
  .nav-item.has-mega.open .mega-panel {
    display: block;
  }
  .mega-cols {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .mega-links {
    grid-template-columns: 1fr;
  }

  .version-hero {
    padding: 110px 0 64px;
  }
  .version-hero h1 {
    font-size: 30px;
  }
  .version-hero .hero-desc {
    font-size: 16px;
  }
  .hero-stats {
    gap: 24px;
    margin-top: 32px;
  }
  .stat-num {
    font-size: 22px;
  }

  .section {
    padding: 48px 0;
  }
  .section-head h2 {
    font-size: 26px;
  }

  .timeline-section {
    padding: 48px 0;
  }
  .timeline {
    padding-left: 44px;
  }
  .timeline-marker {
    left: -44px;
    width: 32px;
    height: 32px;
    font-size: 13px;
  }
  .timeline::before {
    left: 15px;
  }
  .timeline-card {
    padding: 20px;
  }
  .tl-card-head {
    flex-direction: column;
    align-items: flex-start;
  }

  .policy-section {
    padding: 48px 0;
  }
  .policy-card {
    margin-bottom: 16px;
  }

  .download-section {
    padding: 48px 0;
  }
  .download-info h2 {
    font-size: 26px;
  }

  .faq-section {
    padding: 48px 0;
  }
  .faq-question {
    font-size: 15px;
    padding: 16px;
  }
  .faq-answer-inner {
    padding: 0 16px 16px;
  }

  .footer-main {
    padding: 40px 0 24px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}