:root {
  --blue: #0E3A6B;
  --blue-deep: #0a2c52;
  --blue-soft: #1c5494;
  --gold: #C9A45C;
  --gold-deep: #b58e44;
  --ink: #1f2733;
  --muted: #647084;
  --line: #e6eaf0;
  --bg-alt: #f5f7fb;
  --white: #ffffff;
  --radius: 14px;
  --shadow: 0 18px 40px rgba(14, 58, 107, 0.10);
  --shadow-sm: 0 8px 20px rgba(14, 58, 107, 0.08);
  --maxw: 1160px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 22px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-block;
  padding: 13px 28px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all .25s ease;
  white-space: nowrap;
}
.btn-gold { background: var(--gold); color: #fff; }
.btn-gold:hover { background: var(--gold-deep); transform: translateY(-2px); box-shadow: 0 10px 22px rgba(201,164,92,.35); }
.btn-ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,.6); }
.btn-ghost:hover { background: rgba(255,255,255,.12); border-color:#fff; }
.btn-block { width: 100%; text-align: center; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  background: rgba(255,255,255,.0);
  transition: background .3s ease, box-shadow .3s ease, padding .3s ease;
  padding: 18px 0;
}
.site-header.scrolled {
  background: rgba(255,255,255,.96);
  box-shadow: 0 6px 24px rgba(14,58,107,.08);
  padding: 10px 0;
}
.nav-wrap { display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  width: 42px; height: 42px; border-radius: 10px;
  background: var(--blue); color: var(--gold);
  display: grid; place-items: center;
  font-weight: 800; font-size: 16px; letter-spacing: 1px;
  box-shadow: inset 0 0 0 1px rgba(201,164,92,.5);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-text strong { font-size: 18px; color: var(--blue); }
.site-header:not(.scrolled) .brand-text strong { color: #fff; }
.brand-text em { font-style: normal; font-size: 10px; letter-spacing: 2px; color: var(--gold); }
.nav { display: flex; gap: 30px; }
.nav a { font-size: 15px; font-weight: 500; color: var(--ink); position: relative; padding: 4px 0; }
.site-header:not(.scrolled) .nav a { color: rgba(255,255,255,.92); }
.nav a::after { content:""; position:absolute; left:0; bottom:-2px; width:0; height:2px; background: var(--gold); transition: width .25s; }
.nav a:hover::after { width: 100%; }
.nav-cta { padding: 10px 22px; font-size: 14px; }
.site-header:not(.scrolled) .nav-cta { background: var(--gold); color:#fff; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 6px; }
.nav-toggle span { width: 24px; height: 2px; background: var(--blue); display: block; }
.site-header:not(.scrolled) .nav-toggle span { background: #fff; }

/* ---------- Hero ---------- */
.hero { position: relative; color: #fff; padding: 150px 0 90px; overflow: hidden; }
.hero-bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(201,164,92,.28), transparent 60%),
    linear-gradient(135deg, var(--blue) 0%, var(--blue-deep) 70%, #061d38 100%);
}
.hero-bg::after {
  content:""; position:absolute; inset:0;
  background-image: radial-gradient(rgba(255,255,255,.05) 1px, transparent 1px);
  background-size: 26px 26px; opacity:.5;
}
.hero-inner { position: relative; display: grid; grid-template-columns: 1.15fr .85fr; gap: 50px; align-items: center; }
.eyebrow { color: var(--gold); font-weight: 600; letter-spacing: 2px; margin: 0 0 14px; font-size: 14px; }
.hero h1 { font-size: 46px; line-height: 1.2; margin: 0 0 20px; font-weight: 800; letter-spacing: 1px; }
.hero .lead { font-size: 17px; color: rgba(255,255,255,.86); margin: 0 0 32px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-stats { list-style: none; display: flex; gap: 40px; padding: 0; margin: 46px 0 0; }
.hero-stats li { display: flex; flex-direction: column; }
.hero-stats strong { font-size: 38px; color: var(--gold); font-weight: 800; line-height: 1; }
.hero-stats span { font-size: 14px; color: rgba(255,255,255,.8); margin-top: 8px; }

.hero-card {
  background: rgba(255,255,255,.07);
  border: 1px solid rgba(255,255,255,.18);
  border-radius: 18px; padding: 26px; backdrop-filter: blur(8px);
  box-shadow: 0 30px 60px rgba(0,0,0,.25);
}
.hc-row { display: flex; align-items: center; justify-content: space-between; padding: 16px 4px; border-bottom: 1px solid rgba(255,255,255,.12); }
.hc-row:last-child { border-bottom: 0; }
.hc-row span { color: rgba(255,255,255,.9); font-size: 16px; }
.hc-row b { color: var(--gold); font-size: 15px; font-weight: 600; }

/* ---------- 通用区块 ---------- */
.section { padding: 90px 0; }
.section-alt { background: var(--bg-alt); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 54px; }
.tag { display: inline-block; color: var(--gold); font-weight: 700; letter-spacing: 3px; font-size: 13px; margin-bottom: 14px; }
.tag-light { color: var(--gold); }
.section-head h2 { font-size: 33px; margin: 0 0 14px; color: var(--blue); font-weight: 800; }
.section-head p { color: var(--muted); font-size: 16px; margin: 0; }

/* ---------- 服务卡片 ---------- */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 32px 28px; transition: transform .25s ease, box-shadow .25s ease, border-color .25s;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: transparent; }
.card-icon {
  width: 56px; height: 56px; border-radius: 14px; background: rgba(14,58,107,.07);
  display: grid; place-items: center; font-size: 28px; margin-bottom: 18px;
}
.card h3 { font-size: 20px; margin: 0 0 10px; color: var(--blue); }
.card p { color: var(--muted); font-size: 15px; margin: 0 0 16px; }
.card-list { list-style: none; padding: 0; margin: 0; }
.card-list li { position: relative; padding-left: 22px; font-size: 14px; color: var(--ink); margin-bottom: 8px; }
.card-list li::before { content:""; position: absolute; left: 0; top: 9px; width: 8px; height: 8px; border-radius: 50%; background: var(--gold); }
.card-accent { background: linear-gradient(160deg, var(--blue), var(--blue-deep)); border-color: transparent; }
.card-accent .card-icon { background: rgba(201,164,92,.22); }
.card-accent h3, .card-accent p, .card-accent .card-list li { color: #fff; }
.card-accent .card-list li::before { background: var(--gold); }

/* ---------- 关于我们 ---------- */
.about-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 56px; align-items: center; }
.about-media {
  position: relative; border-radius: 20px; min-height: 380px;
  background: linear-gradient(150deg, var(--blue), var(--blue-deep));
  display: grid; place-items: center; overflow: hidden;
  box-shadow: var(--shadow);
}
.about-media::before {
  content:""; position:absolute; inset:0;
  background-image: radial-gradient(rgba(201,164,92,.18) 1px, transparent 1px);
  background-size: 22px 22px;
}
.about-badge { position: relative; text-align: center; color: #fff; }
.about-badge span { display: block; font-size: 64px; font-weight: 800; color: var(--gold); letter-spacing: 4px; }
.about-badge em { font-style: normal; letter-spacing: 6px; color: rgba(255,255,255,.8); }
.about-copy h2 { font-size: 30px; color: var(--blue); margin: 12px 0 18px; font-weight: 800; }
.about-copy p { color: var(--muted); margin: 0 0 16px; }
.about-points { display: flex; gap: 16px; margin-top: 24px; flex-wrap: wrap; }
.point { flex: 1; min-width: 150px; background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 18px; }
.point b { display: block; color: var(--gold); font-size: 18px; margin-bottom: 6px; }
.point span { font-size: 13px; color: var(--muted); }

/* ---------- 核心优势 ---------- */
.adv-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.adv { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 30px 24px; transition: transform .25s, box-shadow .25s; }
.adv:hover { transform: translateY(-6px); box-shadow: var(--shadow-sm); }
.adv-num { font-size: 30px; font-weight: 800; color: rgba(14,58,107,.14); margin-bottom: 10px; }
.adv h3 { margin: 0 0 8px; color: var(--blue); font-size: 18px; }
.adv p { margin: 0; color: var(--muted); font-size: 14px; }

/* ---------- 联系我们 ---------- */
.section-contact {
  background: linear-gradient(135deg, var(--blue), var(--blue-deep));
  color: #fff;
}
.section-contact .tag { color: var(--gold); }
.section-contact h2 { color: #fff; font-size: 32px; margin: 10px 0 14px; font-weight: 800; }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: start; }
.contact-info p { color: rgba(255,255,255,.85); }
.contact-list { list-style: none; padding: 0; margin: 26px 0 0; }
.contact-list li { display: flex; gap: 12px; align-items: center; padding: 12px 0; border-bottom: 1px solid rgba(255,255,255,.12); font-size: 15px; }
.contact-list span { font-size: 18px; }
.contact-form { background: #fff; border-radius: 18px; padding: 32px; box-shadow: var(--shadow); }
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 14px; color: var(--ink); margin-bottom: 7px; font-weight: 600; }
.field input, .field select, .field textarea {
  width: 100%; padding: 12px 14px; border: 1px solid var(--line); border-radius: 10px;
  font-size: 15px; font-family: inherit; color: var(--ink); background: #fbfcfe; transition: border-color .2s, box-shadow .2s;
}
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--blue); box-shadow: 0 0 0 3px rgba(14,58,107,.12); }
.field textarea { resize: vertical; }
.form-note { font-size: 12px; color: var(--muted); margin: 12px 0 0; text-align: center; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--blue-deep); color: rgba(255,255,255,.8); padding: 56px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 36px; padding-bottom: 40px; }
.brand-footer .brand-text strong { color: #fff; }
.footer-desc { font-size: 14px; color: rgba(255,255,255,.65); margin-top: 14px; max-width: 280px; }
.site-footer h4 { color: #fff; font-size: 16px; margin: 4px 0 16px; }
.site-footer a { display: block; color: rgba(255,255,255,.7); font-size: 14px; padding: 5px 0; transition: color .2s; }
.site-footer a:hover { color: var(--gold); }
.site-footer p { font-size: 14px; margin: 6px 0; color: rgba(255,255,255,.7); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); padding: 18px 0; font-size: 13px; }
.footer-bottom .container { display: flex; justify-content: space-between; color: rgba(255,255,255,.55); flex-wrap: wrap; gap: 8px; }

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
  .cards { grid-template-columns: repeat(2, 1fr); }
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-inner { grid-template-columns: 1fr; }
  .hero-card { display: none; }
  .about-grid { grid-template-columns: 1fr; gap: 32px; }
  .contact-grid { grid-template-columns: 1fr; gap: 34px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .nav, .nav-cta { display: none; }
  .nav.open { display: flex; position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; background: #fff; padding: 16px 22px; box-shadow: var(--shadow-sm); gap: 6px; }
  .nav.open a { color: var(--ink); padding: 10px 0; border-bottom: 1px solid var(--line); }
  .nav-toggle { display: flex; }
  .hero h1 { font-size: 34px; }
  .hero-stats { gap: 24px; flex-wrap: wrap; }
  .hero-stats strong { font-size: 30px; }
  .section { padding: 64px 0; }
  .cards { grid-template-columns: 1fr; }
  .adv-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .section-head h2 { font-size: 26px; }
}