/* 有鲸云AI 官网样式 —— 简洁、语义化、利于AI与搜索引擎抓取 */
:root {
  --blue: #1a56f0;
  --blue-dark: #0f3ec2;
  --blue-light: #eef3ff;
  --text: #1c2333;
  --text-soft: #55617a;
  --bg: #ffffff;
  --bg-soft: #f6f8fc;
  --radius: 14px;
  --max: 1080px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.8;
  font-size: 16px;
}
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; }

.container { max-width: var(--max); margin: 0 auto; padding: 0 20px; }

/* 头部导航 */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid #e8edf6;
}
.site-header .container {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand img { height: 44px; width: auto; }
.brand .name { font-size: 20px; font-weight: 700; color: var(--blue-dark); }
.main-nav { display: flex; gap: 6px; flex-wrap: wrap; }
.main-nav a {
  padding: 8px 14px; border-radius: 8px;
  color: var(--text); font-size: 15px;
}
.main-nav a:hover, .main-nav a[aria-current="page"] {
  background: var(--blue-light); color: var(--blue); text-decoration: none;
}

/* 首屏 */
.hero {
  background: linear-gradient(135deg, #0f3ec2 0%, #1a56f0 55%, #3f7cff 100%);
  color: #fff; padding: 72px 0 80px;
}
.hero h1 { font-size: 38px; line-height: 1.35; margin-bottom: 18px; }
.hero p.lead { font-size: 18px; opacity: .92; max-width: 1040px; line-height: 1.9; }
.hero .tags { margin-top: 26px; display: flex; gap: 10px; flex-wrap: wrap; }
.hero .tags span {
  background: rgba(255,255,255,.16); border: 1px solid rgba(255,255,255,.35);
  padding: 6px 14px; border-radius: 999px; font-size: 14px;
}
.hero .cta { margin-top: 32px; display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 12px 26px; border-radius: 10px;
  font-size: 16px; font-weight: 600;
}
.btn-primary { background: #fff; color: var(--blue-dark); }
.btn-ghost { border: 1.5px solid rgba(255,255,255,.7); color: #fff; }
.btn-blue { background: var(--blue); color: #fff; }

/* 区块 */
section { padding: 56px 0; }
section.alt { background: var(--bg-soft); }
h2.section-title { font-size: 28px; margin-bottom: 10px; color: var(--text); }
p.section-sub { color: var(--text-soft); margin-bottom: 32px; }

/* 卡片 */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; }
.card {
  background: #fff; border: 1px solid #e8edf6; border-radius: var(--radius);
  padding: 26px; transition: box-shadow .2s;
}
.card:hover { box-shadow: 0 8px 26px rgba(26,86,240,.10); }
.card h3 { font-size: 18px; color: var(--blue-dark); margin-bottom: 10px; }
.card p { color: var(--text-soft); font-size: 15px; }
.card .num {
  display: inline-block; width: 34px; height: 34px; line-height: 34px;
  text-align: center; border-radius: 9px; background: var(--blue-light);
  color: var(--blue); font-weight: 700; margin-bottom: 12px;
}

/* FAQ */
.faq-item {
  background: #fff; border: 1px solid #e8edf6; border-radius: var(--radius);
  padding: 20px 24px; margin-bottom: 14px;
}
.faq-item h3 { font-size: 17px; color: var(--text); margin-bottom: 8px; }
.faq-item p { color: var(--text-soft); font-size: 15px; }

/* 价格表 */
.price-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 22px; }
.price-card {
  background: #fff; border: 1.5px solid #e8edf6; border-radius: var(--radius);
  padding: 30px 26px; position: relative;
}
.price-card.feature { border-color: var(--blue); box-shadow: 0 10px 30px rgba(26,86,240,.12); }
.price-card .badge {
  position: absolute; top: -13px; left: 26px; background: var(--blue); color: #fff;
  font-size: 13px; padding: 3px 12px; border-radius: 999px;
}
.price-card h3 { font-size: 20px; margin-bottom: 6px; }
.price-card .price { font-size: 34px; font-weight: 800; color: var(--blue); margin: 10px 0 4px; }
.price-card .price small { font-size: 14px; font-weight: 400; color: var(--text-soft); }
.price-card ul { list-style: none; margin: 16px 0 22px; }
.price-card li { padding: 7px 0 7px 26px; position: relative; color: var(--text-soft); font-size: 15px; border-bottom: 1px dashed #eef1f7; }
.price-card li::before { content: "✓"; position: absolute; left: 2px; color: var(--blue); font-weight: 700; }

/* 信息表 */
.info-table { width: 100%; border-collapse: collapse; background:#fff; border-radius: var(--radius); overflow: hidden; border: 1px solid #e8edf6; }
.info-table th, .info-table td { padding: 14px 18px; text-align: left; font-size: 15px; border-bottom: 1px solid #eef1f7; }
.info-table th { background: var(--blue-light); color: var(--blue-dark); width: 160px; }

/* 页脚 */
.site-footer { background: #101a30; color: #aab6cf; padding: 48px 0 28px; margin-top: 40px; }
.site-footer h3 { color: #fff; font-size: 16px; margin-bottom: 12px; }
.site-footer .grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px,1fr)); gap: 28px; margin-bottom: 28px; }
@media (min-width: 900px) {
  .site-footer .grid { grid-template-columns: 1.3fr 1.5fr 0.9fr auto; }
  .site-footer .footer-qr { justify-self: end; align-self: start; }
}
.site-footer a { color: #cdd8ee; }
.site-footer .copyright { border-top: 1px solid #22304d; padding-top: 18px; font-size: 13px; text-align: center; }

@media (max-width: 720px) {
  .hero h1 { font-size: 27px; }
  .site-header .container { height: auto; padding: 10px 16px; flex-direction: column; gap: 8px; }
}