/* ============================================
   万嘉天实 Wanjia Tianshi — 官网样式
   对 AI 抓取友好：语义化 HTML，样式仅增强可读性
   ============================================ */
:root {
  --navy: #1b2a4a;
  --blue: #2d4a8f;
  --teal: #2a7f8f;
  --amber: #c9a35f;
  --paper: #faf9f6;
  --ink: #23272e;
  --muted: #6b7280;
  --line: #e3e0d8;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.75;
  font-size: 16px;
}

.container { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

/* ---------- 顶部导航 ---------- */
header.site-header {
  background: var(--navy);
  color: #fff;
  padding: 14px 0;
  position: sticky;
  top: 0;
  z-index: 100;
}
header.site-header .container { display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.brand a { color: #fff; text-decoration: none; font-size: 20px; font-weight: 700; letter-spacing: 1px; }
.brand .en { display: block; font-size: 12px; font-weight: 400; letter-spacing: 2px; color: rgba(255,255,255,.7); margin-top: 2px; }
nav.main-nav ul { list-style: none; display: flex; gap: 22px; flex-wrap: wrap; }
nav.main-nav a { color: rgba(255,255,255,.85); text-decoration: none; font-size: 15px; }
nav.main-nav a:hover { color: #fff; }

/* ---------- 英雄区 ---------- */
.hero { background: linear-gradient(135deg, var(--navy) 0%, var(--blue) 100%); color: #fff; padding: 72px 0 64px; }
.hero .eyebrow { font-size: 13px; letter-spacing: 3px; color: var(--amber); margin-bottom: 16px; text-transform: uppercase; }
.hero h1 { font-size: 40px; line-height: 1.3; margin-bottom: 18px; font-weight: 700; }
.hero p.lead { font-size: 18px; color: rgba(255,255,255,.85); max-width: 720px; margin-bottom: 28px; }
.hero .cta-row { display: flex; gap: 16px; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 12px 28px; border-radius: 6px;
  font-size: 16px; font-weight: 600; text-decoration: none; transition: .2s;
}
.btn-primary { background: var(--amber); color: var(--navy); }
.btn-primary:hover { background: #d9b878; }
.btn-ghost { border: 1px solid rgba(255,255,255,.6); color: #fff; }
.btn-ghost:hover { background: rgba(255,255,255,.12); }

/* ---------- 区块通用 ---------- */
section.block { padding: 64px 0; border-bottom: 1px solid var(--line); }
section.block:last-child { border-bottom: none; }
.eyebrow { font-size: 13px; letter-spacing: 3px; color: var(--teal); margin-bottom: 12px; text-transform: uppercase; }
h2 { font-size: 30px; color: var(--navy); margin-bottom: 20px; }
h3 { font-size: 20px; color: var(--navy); margin: 22px 0 10px; }
p { margin-bottom: 14px; }

/* ---------- 服务卡片 ---------- */
.services-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 22px; margin-top: 24px; }
.service-card {
  background: #fff; border: 1px solid var(--line); border-radius: 10px;
  padding: 26px; transition: box-shadow .2s;
}
.service-card:hover { box-shadow: 0 6px 24px rgba(27,42,74,.08); }
.service-card h3 { margin-top: 0; }
.service-card .tag { display: inline-block; background: rgba(42,127,143,.1); color: var(--teal); font-size: 12px; padding: 3px 10px; border-radius: 20px; margin-bottom: 12px; }

/* ---------- FAQ ---------- */
.faq-list { max-width: 860px; }
.faq-item { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 22px 26px; margin-bottom: 16px; }
.faq-item .q { font-weight: 700; font-size: 17px; color: var(--navy); margin-bottom: 8px; }
.faq-item .a { color: var(--ink); }

/* ---------- 信任/背书 ---------- */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 22px; margin-top: 24px; }
.stat { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 24px; text-align: center; }
.stat .num { font-size: 32px; font-weight: 700; color: var(--blue); }
.stat .label { font-size: 14px; color: var(--muted); margin-top: 6px; }

/* ---------- 原则列表 ---------- */
.principles { list-style: none; margin-top: 16px; }
.principles li { padding: 14px 0; border-bottom: 1px solid var(--line); display: flex; gap: 14px; }
.principles li strong { color: var(--navy); min-width: 90px; }

/* ---------- 页脚 ---------- */
footer.site-footer { background: var(--navy); color: rgba(255,255,255,.8); padding: 40px 0; }
footer.site-footer .container { display: flex; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
footer.site-footer h4 { color: #fff; margin-bottom: 12px; font-size: 15px; }
footer.site-footer a { color: rgba(255,255,255,.75); text-decoration: none; display: block; margin-bottom: 6px; }
footer.site-footer a:hover { color: #fff; }
footer.site-footer .copy { margin-top: 24px; font-size: 13px; color: rgba(255,255,255,.5); }

/* ---------- 联系 ---------- */
.contact-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 22px; margin-top: 20px; }
.contact-card { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 22px; }
.contact-card h3 { margin-top: 0; }

/* ---------- 响应式 ---------- */
@media (max-width: 720px) {
  .hero h1 { font-size: 30px; }
  header.site-header .container { flex-direction: column; align-items: flex-start; }
}