/* ===================================================
   糖心Vlog 官方网站 - 全站样式
   域名：https://www.tw74tt0.cn
   科技企业风格
   =================================================== */

/* ---------- CSS 变量 ---------- */
:root {
  --primary: #0066ff;
  --primary-dark: #0052cc;
  --primary-light: #e8f0ff;
  --secondary: #00c6ff;
  --accent: #7c3aed;
  --text-dark: #0d1117;
  --text-mid: #444d5a;
  --text-light: #8b949e;
  --bg: #f6f8fa;
  --bg-white: #ffffff;
  --bg-dark: #0d1117;
  --border: #e1e4e8;
  --shadow: 0 4px 24px rgba(0,102,255,0.10);
  --shadow-lg: 0 12px 48px rgba(0,102,255,0.15);
  --radius: 12px;
  --radius-lg: 20px;
  --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  color: var(--text-dark);
  background: var(--bg);
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; transition: var(--transition); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ---------- 容器 ---------- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ---------- 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 30px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 700;
  transition: var(--transition);
  white-space: nowrap;
  cursor: pointer;
  border: none;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 16px rgba(0,102,255,0.35);
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,102,255,0.45); }
.btn-outline { border: 2px solid var(--primary); color: var(--primary); background: transparent; }
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-white { background: #fff; color: var(--primary); box-shadow: 0 4px 16px rgba(0,0,0,0.12); }
.btn-white:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.18); }
.btn-ghost { background: rgba(255,255,255,0.12); color: #fff; border: 1px solid rgba(255,255,255,0.3); }
.btn-ghost:hover { background: rgba(255,255,255,0.22); }

/* ---------- 通用 Section ---------- */
.section { padding: 80px 0; }
.section-alt { background: var(--bg-white); }
.section-dark { background: var(--bg-dark); }
.section-header { text-align: center; margin-bottom: 56px; }
.section-tag {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 50px;
  margin-bottom: 14px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.section-tag-dark { background: rgba(0,102,255,0.2); color: var(--secondary); }
.section-title {
  font-size: clamp(24px, 4vw, 38px);
  font-weight: 900;
  color: var(--text-dark);
  line-height: 1.25;
  margin-bottom: 14px;
}
.section-title span { color: var(--primary); }
.section-title-white { color: #fff; }
.section-desc { font-size: 16px; color: var(--text-mid); max-width: 600px; margin: 0 auto; line-height: 1.8; }
.section-desc-white { color: rgba(255,255,255,0.7); }

/* ---------- 顶部导航 ---------- */
#site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 28px;
  height: 68px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  font-size: 20px;
  font-weight: 900;
}
.logo em { font-style: normal; color: var(--primary); }
.logo-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 16px;
  font-weight: 900;
  flex-shrink: 0;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 2px;
  flex: 1;
}
.main-nav a {
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-mid);
  transition: var(--transition);
  white-space: nowrap;
}
.main-nav a:hover, .main-nav a.active { color: var(--primary); background: var(--primary-light); }
.header-cta { flex-shrink: 0; }
.header-cta .btn { padding: 9px 20px; font-size: 13px; }
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 6px;
  margin-left: auto;
}
.menu-toggle span { display: block; width: 24px; height: 2px; background: var(--text-dark); border-radius: 2px; transition: var(--transition); }

/* 搜索栏 */
.search-bar-row { background: var(--bg); border-bottom: 1px solid var(--border); padding: 10px 0; }
.search-form {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-white);
  border: 1.5px solid var(--border);
  border-radius: 8px;
  padding: 8px 16px;
  max-width: 560px;
  transition: var(--transition);
}
.search-form:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(0,102,255,0.10); }
.search-input { flex: 1; border: none; outline: none; font-size: 14px; color: var(--text-dark); background: transparent; }
.search-input::placeholder { color: var(--text-light); }
.search-btn {
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 6px 18px;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
}
.search-btn:hover { background: var(--primary-dark); }

/* ---------- 面包屑 ---------- */
.breadcrumb-wrap { background: var(--bg); border-bottom: 1px solid var(--border); }
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 12px 0;
  font-size: 13px;
  color: var(--text-light);
}
.breadcrumb a { color: var(--text-mid); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { color: var(--border); }
.breadcrumb .current { color: var(--primary); font-weight: 600; }

/* ---------- Banner 首屏 ---------- */
.hero {
  position: relative;
  min-height: 620px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: linear-gradient(135deg, #0d1117 0%, #0a1628 50%, #0d1117 100%);
}
.hero-particles {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 50%, rgba(0,102,255,0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(0,198,255,0.10) 0%, transparent 50%),
    radial-gradient(circle at 60% 80%, rgba(124,58,237,0.08) 0%, transparent 50%);
  z-index: 0;
}
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; opacity: 0.15; }
.hero-grid-overlay {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(0,102,255,0.05) 1px, transparent 1px), linear-gradient(90deg, rgba(0,102,255,0.05) 1px, transparent 1px);
  background-size: 60px 60px;
  z-index: 1;
}
.hero .container { position: relative; z-index: 2; padding-top: 80px; padding-bottom: 80px; }
.hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.hero-content { color: #fff; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0,102,255,0.2);
  border: 1px solid rgba(0,102,255,0.4);
  color: var(--secondary);
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 24px;
}
.hero-badge-dot { width: 8px; height: 8px; background: #4ade80; border-radius: 50%; animation: pulse 2s infinite; }
@keyframes pulse { 0%,100%{opacity:1;transform:scale(1)} 50%{opacity:.6;transform:scale(1.3)} }
.hero h1 {
  font-size: clamp(30px, 4.5vw, 52px);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}
.hero h1 .highlight {
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc { font-size: 16px; color: rgba(255,255,255,0.8); margin-bottom: 36px; line-height: 1.8; max-width: 520px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 48px; }
.hero-stats { display: flex; gap: 28px; flex-wrap: wrap; }
.hero-stat-item { text-align: center; }
.hero-stat-num { font-size: 26px; font-weight: 900; color: var(--secondary); line-height: 1; margin-bottom: 4px; }
.hero-stat-label { font-size: 12px; color: rgba(255,255,255,0.6); }
.hero-visual { position: relative; }
.hero-card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-lg);
  padding: 24px;
  backdrop-filter: blur(12px);
}
.hero-card-title { font-size: 14px; font-weight: 700; color: rgba(255,255,255,0.9); margin-bottom: 16px; }
.hero-video-preview {
  position: relative;
  aspect-ratio: 16/9;
  background: rgba(0,0,0,0.4);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 16px;
}
.hero-video-preview img { width: 100%; height: 100%; object-fit: cover; opacity: 0.7; }
.hero-video-play {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-play-btn {
  width: 56px;
  height: 56px;
  background: rgba(0,102,255,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 0 0 8px rgba(0,102,255,0.2);
}
.hero-play-btn:hover { transform: scale(1.1); background: var(--primary); }
.hero-play-btn::after { content: ''; border-style: solid; border-width: 9px 0 9px 16px; border-color: transparent transparent transparent #fff; margin-left: 3px; }
.hero-tags { display: flex; gap: 8px; flex-wrap: wrap; }
.hero-tag { background: rgba(0,102,255,0.15); color: var(--secondary); font-size: 12px; font-weight: 600; padding: 4px 12px; border-radius: 50px; border: 1px solid rgba(0,198,255,0.2); }

/* ---------- 统计数字条 ---------- */
.stats-bar { background: var(--primary); padding: 36px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.stat-item { text-align: center; color: #fff; }
.stat-num { font-size: 32px; font-weight: 900; line-height: 1; margin-bottom: 6px; }
.stat-label { font-size: 13px; opacity: 0.85; }

/* ---------- 产品卡片 ---------- */
.product-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 24px; }
.product-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.07);
  border: 1.5px solid transparent;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.product-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  transform: scaleX(0);
  transition: var(--transition);
}
.product-card:hover::before { transform: scaleX(1); }
.product-card:hover { border-color: var(--primary-light); transform: translateY(-4px); box-shadow: var(--shadow); }
.product-icon { font-size: 36px; margin-bottom: 16px; display: block; }
.product-name { font-size: 18px; font-weight: 800; color: var(--text-dark); margin-bottom: 10px; }
.product-desc { font-size: 14px; color: var(--text-mid); line-height: 1.8; margin-bottom: 16px; }
.product-features { display: flex; flex-direction: column; gap: 6px; }
.product-feature { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-mid); }
.product-feature::before { content: '✓'; color: var(--primary); font-weight: 700; flex-shrink: 0; }

/* ---------- 核心能力 ---------- */
.capability-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 20px; }
.capability-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: var(--transition);
}
.capability-card:hover { background: rgba(0,102,255,0.1); border-color: rgba(0,102,255,0.3); transform: translateY(-4px); }
.capability-icon { font-size: 32px; margin-bottom: 14px; display: block; }
.capability-name { font-size: 16px; font-weight: 800; color: #fff; margin-bottom: 10px; }
.capability-desc { font-size: 13px; color: rgba(255,255,255,0.65); line-height: 1.7; }

/* ---------- 行业解决方案 ---------- */
.solution-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 24px; }
.solution-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0,0,0,0.07);
  transition: var(--transition);
}
.solution-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.solution-img { position: relative; aspect-ratio: 16/9; overflow: hidden; }
.solution-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
.solution-card:hover .solution-img img { transform: scale(1.05); }
.solution-industry { position: absolute; top: 12px; left: 12px; background: var(--primary); color: #fff; font-size: 12px; font-weight: 700; padding: 4px 12px; border-radius: 50px; }
.solution-body { padding: 22px; }
.solution-title { font-size: 17px; font-weight: 800; color: var(--text-dark); margin-bottom: 10px; }
.solution-desc { font-size: 14px; color: var(--text-mid); line-height: 1.7; margin-bottom: 16px; }
.solution-tags { display: flex; gap: 8px; flex-wrap: wrap; }
.solution-tag { background: var(--primary-light); color: var(--primary); font-size: 11px; font-weight: 700; padding: 3px 10px; border-radius: 50px; }

/* ---------- 视频卡片 ---------- */
.video-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 24px; }
.video-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
  transition: var(--transition);
  cursor: pointer;
}
.video-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.video-thumb {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/9;
  background: #0d1117;
}
.video-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.video-card:hover .video-thumb img { transform: scale(1.08); }
.video-play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.35);
  opacity: 0;
  transition: var(--transition);
}
.video-card:hover .video-play-btn { opacity: 1; }
.play-icon {
  width: 56px;
  height: 56px;
  background: rgba(255,255,255,0.95);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transform: scale(0.85);
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}
.play-icon::after {
  content: '';
  display: block;
  width: 0; height: 0;
  border-style: solid;
  border-width: 10px 0 10px 18px;
  border-color: transparent transparent transparent var(--primary);
  margin-left: 4px;
}
.video-card:hover .play-icon { transform: scale(1); }
.video-duration { position: absolute; bottom: 10px; right: 10px; background: rgba(0,0,0,0.75); color: #fff; font-size: 12px; font-weight: 600; padding: 3px 8px; border-radius: 6px; }
.video-tag { position: absolute; top: 10px; left: 10px; background: var(--primary); color: #fff; font-size: 11px; font-weight: 700; padding: 3px 10px; border-radius: 50px; }
.video-info { padding: 16px; }
.video-title { font-size: 15px; font-weight: 700; color: var(--text-dark); line-height: 1.5; margin-bottom: 10px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.video-meta { display: flex; gap: 12px; font-size: 12px; color: var(--text-light); flex-wrap: wrap; }
.video-meta span { display: flex; align-items: center; gap: 4px; }

/* ---------- 案例卡片 ---------- */
.case-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 28px; }
.case-card { background: var(--bg-white); border-radius: var(--radius-lg); overflow: hidden; box-shadow: 0 4px 20px rgba(0,0,0,0.08); transition: var(--transition); }
.case-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.case-img { position: relative; aspect-ratio: 16/9; overflow: hidden; }
.case-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
.case-card:hover .case-img img { transform: scale(1.05); }
.case-industry { position: absolute; top: 12px; left: 12px; background: var(--primary); color: #fff; font-size: 12px; font-weight: 700; padding: 4px 12px; border-radius: 50px; }
.case-body { padding: 22px; }
.case-title { font-size: 16px; font-weight: 800; color: var(--text-dark); margin-bottom: 10px; }
.case-result { font-size: 14px; color: var(--text-mid); line-height: 1.7; margin-bottom: 16px; }
.case-data { display: flex; gap: 16px; border-top: 1px solid var(--border); padding-top: 14px; }
.case-data-item { text-align: center; }
.case-data-num { font-size: 18px; font-weight: 800; color: var(--primary); }
.case-data-label { font-size: 11px; color: var(--text-light); }

/* ---------- 新闻卡片 ---------- */
.news-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 24px; }
.news-card { background: var(--bg-white); border-radius: var(--radius); overflow: hidden; box-shadow: 0 4px 16px rgba(0,0,0,0.07); transition: var(--transition); }
.news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.news-img { aspect-ratio: 16/9; overflow: hidden; }
.news-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
.news-card:hover .news-img img { transform: scale(1.05); }
.news-body { padding: 20px; }
.news-tag { display: inline-block; background: var(--primary-light); color: var(--primary); font-size: 11px; font-weight: 700; padding: 3px 10px; border-radius: 50px; margin-bottom: 10px; }
.news-title { font-size: 15px; font-weight: 700; color: var(--text-dark); margin-bottom: 8px; line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-date { font-size: 12px; color: var(--text-light); }

/* ---------- 用户评价 ---------- */
.reviews-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 24px; }
.review-card { background: var(--bg-white); border-radius: var(--radius-lg); padding: 28px; box-shadow: 0 4px 20px rgba(0,0,0,0.07); border: 1.5px solid var(--border); transition: var(--transition); position: relative; }
.review-card:hover { border-color: var(--primary-light); box-shadow: var(--shadow); transform: translateY(-4px); }
.review-quote { position: absolute; top: 20px; right: 24px; font-size: 48px; color: var(--primary-light); font-family: Georgia, serif; line-height: 1; }
.review-stars { color: #fbbf24; font-size: 16px; margin-bottom: 12px; }
.review-text { font-size: 14px; color: var(--text-mid); line-height: 1.8; margin-bottom: 18px; }
.review-user { display: flex; align-items: center; gap: 12px; }
.review-avatar { width: 44px; height: 44px; border-radius: 50%; background: linear-gradient(135deg, var(--primary), var(--secondary)); display: flex; align-items: center; justify-content: center; color: #fff; font-size: 16px; font-weight: 800; flex-shrink: 0; }
.review-name { font-size: 14px; font-weight: 700; color: var(--text-dark); }
.review-role { font-size: 12px; color: var(--text-light); }

/* ---------- FAQ ---------- */
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item { background: var(--bg-white); border-radius: var(--radius); border: 1.5px solid var(--border); overflow: hidden; transition: var(--transition); }
.faq-item:hover { border-color: var(--primary-light); }
.faq-item.open { border-color: var(--primary); box-shadow: 0 4px 16px rgba(0,102,255,0.1); }
.faq-question { display: flex; align-items: center; justify-content: space-between; padding: 18px 22px; font-size: 15px; font-weight: 700; color: var(--text-dark); cursor: pointer; user-select: none; gap: 12px; }
.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; font-weight: 700; flex-shrink: 0; transition: var(--transition); }
.faq-item.open .faq-icon { background: var(--primary); color: #fff; transform: rotate(45deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s ease; padding: 0 22px; font-size: 14px; color: var(--text-mid); line-height: 1.8; }
.faq-item.open .faq-answer { max-height: 300px; padding: 0 22px 18px; }

/* ---------- 流程步骤 ---------- */
.process-steps { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 8px; }
.step { display: flex; flex-direction: column; align-items: center; gap: 8px; min-width: 80px; }
.step-num { width: 48px; height: 48px; border-radius: 50%; background: linear-gradient(135deg, var(--primary), var(--secondary)); color: #fff; font-size: 18px; font-weight: 900; display: flex; align-items: center; justify-content: center; }
.step-label { font-size: 13px; font-weight: 600; color: var(--text-mid); text-align: center; }
.step-arrow { font-size: 20px; color: var(--primary); opacity: .5; }

/* ---------- 合作伙伴 ---------- */
.partners-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 16px; }
.partner-item { background: var(--bg-white); border-radius: var(--radius); padding: 20px; text-align: center; font-size: 14px; font-weight: 700; color: var(--text-mid); border: 1.5px solid var(--border); transition: var(--transition); }
.partner-item:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-2px); }

/* ---------- 联系模块 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.contact-info { display: flex; flex-direction: column; gap: 20px; }
.contact-item { display: flex; align-items: flex-start; gap: 16px; padding: 16px; background: var(--bg-white); border-radius: var(--radius); box-shadow: 0 2px 12px rgba(0,0,0,0.05); }
.contact-icon { width: 46px; height: 46px; border-radius: 12px; background: var(--primary-light); display: flex; align-items: center; justify-content: center; font-size: 20px; flex-shrink: 0; }
.contact-label { font-size: 12px; color: var(--text-light); margin-bottom: 4px; }
.contact-value { font-size: 15px; font-weight: 600; color: var(--text-dark); }

/* ---------- 内页 Hero ---------- */
.page-hero { background: linear-gradient(135deg, var(--bg-dark) 0%, #0a1628 100%); padding: 64px 0; text-align: center; position: relative; overflow: hidden; }
.page-hero::before { content: ''; position: absolute; inset: 0; background-image: radial-gradient(circle at 30% 50%, rgba(0,102,255,0.12) 0%, transparent 60%), radial-gradient(circle at 70% 30%, rgba(0,198,255,0.08) 0%, transparent 60%); }
.page-hero .container { position: relative; z-index: 1; }
.page-hero h1 { font-size: clamp(26px, 4vw, 44px); font-weight: 900; color: #fff; margin-bottom: 12px; }
.page-hero p { font-size: 16px; color: rgba(255,255,255,0.75); }

/* ---------- 页脚 ---------- */
#site-footer { background: #0d1117; color: rgba(255,255,255,0.75); padding: 64px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand .logo { margin-bottom: 14px; }
.footer-desc { font-size: 13px; line-height: 1.8; color: rgba(255,255,255,0.5); }
.footer-col h4 { font-size: 14px; font-weight: 700; color: #fff; margin-bottom: 16px; padding-bottom: 10px; border-bottom: 1px solid rgba(255,255,255,0.08); }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { font-size: 13px; color: rgba(255,255,255,0.5); transition: var(--transition); }
.footer-links a:hover { color: var(--secondary); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding: 20px 0; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; font-size: 13px; color: rgba(255,255,255,0.35); }
.footer-social { display: flex; gap: 10px; }
.social-link { width: 34px; height: 34px; border-radius: 8px; background: rgba(255,255,255,0.07); display: flex; align-items: center; justify-content: center; font-size: 13px; font-weight: 700; color: rgba(255,255,255,0.55); transition: var(--transition); }
.social-link:hover { background: var(--primary); color: #fff; }

/* ---------- 关于页布局 ---------- */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.about-img-wrap { position: relative; border-radius: var(--radius-lg); overflow: hidden; }
.about-img-wrap img { width: 100%; aspect-ratio: 4/3; object-fit: cover; }
.about-badge { position: absolute; bottom: 20px; left: 20px; background: var(--primary); color: #fff; padding: 8px 18px; border-radius: 50px; font-size: 13px; font-weight: 700; }
.about-desc { font-size: 15px; color: var(--text-mid); line-height: 1.9; margin-bottom: 16px; }
.about-values { display: flex; flex-direction: column; gap: 14px; margin-top: 24px; }
.value-item { display: flex; align-items: flex-start; gap: 14px; }
.value-icon { font-size: 24px; flex-shrink: 0; }
.value-title { font-size: 14px; font-weight: 700; color: var(--text-dark); margin-bottom: 4px; }
.value-desc { font-size: 13px; color: var(--text-mid); }

/* ---------- 时间轴 ---------- */
.timeline { position: relative; padding-left: 32px; }
.timeline::before { content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 2px; background: linear-gradient(to bottom, var(--primary), var(--secondary)); }
.timeline-item { position: relative; margin-bottom: 32px; }
.timeline-dot { position: absolute; left: -38px; top: 4px; width: 14px; height: 14px; background: var(--primary); border-radius: 50%; border: 3px solid var(--bg-white); box-shadow: 0 0 0 3px var(--primary); }
.timeline-year { font-size: 12px; font-weight: 700; color: var(--primary); margin-bottom: 4px; }
.timeline-title { font-size: 15px; font-weight: 700; color: var(--text-dark); margin-bottom: 6px; }
.timeline-desc { font-size: 13px; color: var(--text-mid); line-height: 1.7; }

/* ---------- 技术优势 ---------- */
.tech-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 20px; }
.tech-card { background: var(--bg-white); border-radius: var(--radius); padding: 24px; box-shadow: 0 4px 16px rgba(0,0,0,0.06); text-align: center; transition: var(--transition); border: 1.5px solid transparent; }
.tech-card:hover { border-color: var(--primary-light); transform: translateY(-4px); box-shadow: var(--shadow); }
.tech-icon { font-size: 36px; margin-bottom: 12px; display: block; }
.tech-name { font-size: 15px; font-weight: 700; color: var(--text-dark); margin-bottom: 8px; }
.tech-desc { font-size: 13px; color: var(--text-mid); line-height: 1.6; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
}
@media (max-width: 768px) {
  .section { padding: 56px 0; }
  .main-nav { display: none; flex-direction: column; position: absolute; top: 68px; left: 0; right: 0; background: #fff; padding: 16px; border-bottom: 1px solid var(--border); box-shadow: 0 8px 24px rgba(0,0,0,0.1); z-index: 999; }
  .main-nav.open { display: flex; }
  .menu-toggle { display: flex; }
  .header-cta { display: none; }
  .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .process-steps { gap: 8px; }
  .step-arrow { display: none; }
  .case-grid { grid-template-columns: 1fr; }
  .hero { min-height: 480px; }
  .hero .container { padding-top: 48px; padding-bottom: 48px; }
}
@media (max-width: 480px) {
  .hero h1 { font-size: 26px; }
  .hero-actions { flex-direction: column; }
  .hero-stats { gap: 20px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .video-grid { grid-template-columns: 1fr; }
  .service-grid { grid-template-columns: 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
  .product-grid { grid-template-columns: 1fr; }
  .capability-grid { grid-template-columns: 1fr 1fr; }
}