/* ============ 智临科技 企业官网 公共样式 ============ */
:root {
  --primary: #1a56db;
  --primary-dark: #1140a8;
  --accent: #3b82f6;
  --ink: #0f172a;
  --ink-soft: #475569;
  --muted: #94a3b8;
  --bg: #ffffff;
  --bg-soft: #f5f7fb;
  --line: #e5e9f2;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(15, 23, 42, .07);
  --maxw: 1180px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-block;
  padding: 13px 34px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all .25s ease;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 10px 24px rgba(26,86,219,.35); }
.btn-ghost { border-color: var(--line); color: var(--ink); background: #fff; }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo { display: flex; align-items: center; gap: 10px; font-size: 21px; font-weight: 800; letter-spacing: .5px; }
.logo-mark {
  width: 36px; height: 36px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; font-weight: 800;
}
.nav-links { display: flex; gap: 36px; }
.nav-links a { font-size: 15px; color: var(--ink-soft); font-weight: 500; position: relative; padding: 6px 0; transition: color .2s; }
.nav-links a:hover, .nav-links a.active { color: var(--primary); }
.nav-links a.active::after {
  content: "";
  position: absolute; left: 0; right: 0; bottom: -4px;
  height: 2px; border-radius: 2px; background: var(--primary);
}
.nav-cta { padding: 9px 26px; font-size: 14px; }

/* ---------- 页面小标题 ---------- */
.page-hero {
  background: linear-gradient(180deg, #f3f6fd 0%, #fff 100%);
  padding: 88px 0 72px;
  text-align: center;
}
.page-hero .eyebrow { color: var(--primary); font-weight: 700; font-size: 14px; letter-spacing: 3px; text-transform: uppercase; }
.page-hero h1 { font-size: 40px; font-weight: 800; margin: 14px 0 12px; }
.page-hero p { color: var(--ink-soft); font-size: 17px; max-width: 640px; margin: 0 auto; }

.section { padding: 90px 0; }
.section.soft { background: var(--bg-soft); }
.section-head { text-align: center; max-width: 620px; margin: 0 auto 56px; }
.section-head .eyebrow { color: var(--primary); font-size: 13px; font-weight: 700; letter-spacing: 3px; }
.section-head h2 { font-size: 34px; font-weight: 800; margin: 12px 0 14px; }
.section-head p { color: var(--ink-soft); font-size: 16px; }

/* ---------- 网格卡片 ---------- */
.grid { display: grid; gap: 26px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 34px 30px;
  transition: all .25s ease;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: transparent; }
.card .icon {
  width: 54px; height: 54px;
  border-radius: 12px;
  background: #eaf1ff;
  color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 26px;
  margin-bottom: 20px;
}
.card h3 { font-size: 19px; font-weight: 700; margin-bottom: 10px; }
.card p { color: var(--ink-soft); font-size: 15px; }
.card .more { display: inline-block; margin-top: 16px; color: var(--primary); font-size: 14px; font-weight: 600; }

/* ---------- 数字统计 ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
.stats .num { font-size: 42px; font-weight: 800; color: var(--primary); }
.stats .num span { font-size: 22px; }
.stats .label { color: var(--ink-soft); font-size: 15px; margin-top: 6px; }

/* ---------- 页脚 ---------- */
.site-footer { background: #0b1526; color: #cbd5e1; padding: 64px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 48px; }
.site-footer h4 { color: #fff; font-size: 16px; margin-bottom: 18px; }
.site-footer .logo { color: #fff; margin-bottom: 16px; }
.site-footer p { font-size: 14px; color: #94a3b8; }
.site-footer li { margin-bottom: 10px; font-size: 14px; }
.site-footer li a:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 20px 0;
  text-align: center;
  font-size: 13px;
  color: #64748b;
}

/* ---------- 表单 ---------- */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-item { display: flex; flex-direction: column; gap: 8px; }
.form-item.full { grid-column: 1 / -1; }
.form-item label { font-size: 14px; font-weight: 600; color: var(--ink); }
.form-item input, .form-item select, .form-item textarea {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 16px;
  font-size: 15px;
  font-family: inherit;
  background: #fff;
  transition: border-color .2s, box-shadow .2s;
}
.form-item textarea { min-height: 130px; resize: vertical; }
.form-item input:focus, .form-item select:focus, .form-item textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26,86,219,.12);
}

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .grid-3, .grid-4, .stats, .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .grid-2 { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .page-hero h1 { font-size: 30px; }
  .section-head h2 { font-size: 26px; }
  .form-grid { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .grid-3, .grid-4, .stats, .footer-grid { grid-template-columns: 1fr; }
}