/* 亚天汽车官网 - 商务蓝 */
:root {
  --primary: #1D4ED8;
  --primary-dark: #1E3A8A;
  --primary-light: #EFF4FF;
  --text: #1F2937;
  --text-muted: #6B7280;
  --bg: #FFFFFF;
  --bg-alt: #F5F8FF;
  --border: #E5E7EB;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text); background: var(--bg); line-height: 1.7; font-size: 16px;
}
.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
h1 { font-size: 34px; line-height: 1.3; }
h2 { font-size: 28px; margin-bottom: 8px; }
h3 { font-size: 19px; }
img { max-width: 100%; }

/* Header */
.site-header { background: #fff; border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 100; }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 14px 20px; flex-wrap: wrap; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; color: var(--text); }
.logo:hover { text-decoration: none; }
.logo-mark { background: var(--primary); color: #fff; padding: 6px 10px; border-radius: 8px; font-size: 18px; }
.logo-text { font-size: 16px; }
.nav { display: flex; gap: 4px; flex-wrap: wrap; }
.nav a { padding: 8px 14px; border-radius: 6px; color: var(--text); font-size: 15px; }
.nav a:hover, .nav a.active { background: var(--primary-light); color: var(--primary); text-decoration: none; }
.header-phone { font-weight: 700; font-size: 17px; white-space: nowrap; }
.header-phones { display: flex; align-items: center; gap: 6px 16px; flex-wrap: wrap; margin-left: auto; }
.header-phones .header-phone { color: var(--primary); }
.header-phones .header-phone:hover { text-decoration: underline; }

/* Hero */
.hero { background: linear-gradient(135deg, #1E3A8A 0%, #1D4ED8 60%, #2563EB 100%); color: #fff; padding: 72px 0 56px; }
.hero-tag { display: inline-block; background: rgba(255,255,255,.15); border: 1px solid rgba(255,255,255,.3); padding: 4px 14px; border-radius: 999px; font-size: 14px; margin-bottom: 18px; }
.hero h1 { color: #fff; margin-bottom: 16px; }
.hero-sub { font-size: 17px; opacity: .92; max-width: 780px; margin-bottom: 28px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 28px; }
.hero-badges { list-style: none; display: flex; gap: 22px; flex-wrap: wrap; font-size: 14.5px; opacity: .95; }

/* Buttons */
.btn { display: inline-block; padding: 12px 26px; border-radius: 8px; font-weight: 600; font-size: 16px; }
.btn:hover { text-decoration: none; opacity: .92; }
.btn-primary { background: #fff; color: var(--primary); }
.btn-ghost { border: 1.5px solid rgba(255,255,255,.7); color: #fff; }
.btn-light { background: var(--primary); color: #fff; }
.section .btn-primary { background: var(--primary); color: #fff; }

/* Sections */
.section { padding: 56px 0; }
.section-alt { background: var(--bg-alt); }
.section-sub { color: var(--text-muted); margin-bottom: 28px; }
.grid-4 { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 18px; }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 22px; }
.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 22px; }
.card { background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 24px; }
.card h3 { margin-bottom: 10px; color: var(--primary-dark); }
.card p { color: var(--text-muted); font-size: 15px; margin-bottom: 12px; }
.feature { background: #fff; border-left: 4px solid var(--primary); border-radius: 0 12px 12px 0; padding: 20px 24px; box-shadow: 0 1px 3px rgba(0,0,0,.05); }
.feature strong { display: block; font-size: 18px; margin-bottom: 8px; color: var(--primary-dark); }
.feature p { color: var(--text-muted); font-size: 15px; }

/* FAQ */
.faq-preview details, .faq-page details { background: #fff; border: 1px solid var(--border); border-radius: 10px; padding: 16px 20px; margin-bottom: 12px; }
.faq-preview summary, .faq-page summary { font-weight: 600; font-size: 16.5px; cursor: pointer; color: var(--text); }
.faq-preview p, .faq-page details p { margin-top: 10px; color: var(--text-muted); font-size: 15px; }
.faq-page details[open] summary { color: var(--primary); }
.anchor { scroll-margin-top: 90px; }

/* Tables */
.table-wrap { overflow-x: auto; }
table.cmp { width: 100%; border-collapse: collapse; background: #fff; font-size: 15px; }
table.cmp th, table.cmp td { border: 1px solid var(--border); padding: 10px 14px; text-align: left; }
table.cmp th { background: var(--primary-light); color: var(--primary-dark); }

/* Steps */
.steps { counter-reset: step; }
.step { position: relative; padding: 0 0 24px 52px; }
.step::before { counter-increment: step; content: counter(step); position: absolute; left: 0; top: 0; width: 34px; height: 34px; background: var(--primary); color: #fff; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 700; }
.step h3 { margin-bottom: 6px; }
.step p { color: var(--text-muted); font-size: 15px; }

/* Notice box */
.notice { background: #FFF7ED; border: 1px solid #FDBA74; border-radius: 10px; padding: 16px 20px; font-size: 15px; margin: 20px 0; }
.notice strong { color: #C2410C; }

/* CTA band */
.cta-band { background: var(--primary-dark); color: #fff; padding: 48px 0; text-align: center; }
.cta-band h2 { color: #fff; margin-bottom: 10px; }
.cta-band p { opacity: .9; margin-bottom: 22px; }

/* Page hero (subpages) */
.page-hero { background: linear-gradient(135deg, #1E3A8A, #1D4ED8); color: #fff; padding: 48px 0; }
.page-hero h1 { color: #fff; font-size: 30px; margin-bottom: 10px; }
.page-hero p { opacity: .92; max-width: 760px; }

/* Footer */
.site-footer { background: #111827; color: #D1D5DB; padding: 44px 0 20px; font-size: 14.5px; }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 28px; margin-bottom: 30px; }
.footer-grid h4 { color: #fff; margin-bottom: 10px; font-size: 16px; }
.footer-grid a { color: #9CA3AF; }
.footer-grid a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid #374151; padding-top: 16px; }
.footer-bottom p { text-align: center; color: #9CA3AF; font-size: 13.5px; }

/* Contact page */
.contact-card { background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 28px; }
.contact-card h3 { color: var(--primary-dark); margin-bottom: 12px; }
.contact-card p { margin-bottom: 6px; color: var(--text-muted); }
.contact-card .big { font-size: 22px; font-weight: 700; color: var(--primary); }

@media (max-width: 720px) {
  h1 { font-size: 26px; }
  h2 { font-size: 22px; }
  .hero { padding: 48px 0 40px; }
  .header-inner { justify-content: center; text-align: center; }
  .header-phones { justify-content: center; margin-left: 0; }
  .logo-text { font-size: 14px; }
}