/* ===== 设计变量 ===== */
:root {
  --navy: #0b2545;
  --navy-2: #13315c;
  --navy-3: #1d4ed8;
  --gold: #c9a227;
  --gold-soft: #e7c860;
  --ink: #1a2233;
  --muted: #5b6678;
  --line: #e6e9f0;
  --bg: #ffffff;
  --bg-alt: #f6f8fc;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 10px 30px rgba(11, 37, 69, .08);
  --shadow-lg: 0 24px 60px rgba(11, 37, 69, .16);
  --max: 1160px;
  --font: "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-serif: "Noto Serif SC", Georgia, serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.container { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 24px; }

/* ===== 通用区块 ===== */
.section { padding: 96px 0; }
.section-alt { background: var(--bg-alt); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-head h2 {
  font-family: var(--font-serif);
  font-size: clamp(28px, 4vw, 40px);
  color: var(--navy);
  margin: 14px 0 16px;
  line-height: 1.3;
}
.section-head p { color: var(--muted); font-size: 17px; }

.eyebrow {
  display: inline-block;
  font-size: 13px;
  letter-spacing: .18em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--gold-soft);
}
.eyebrow.dark { color: var(--gold); }

.gold { color: var(--gold); }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 26px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 15px;
  cursor: pointer;
  border: 2px solid transparent;
  transition: transform .2s, box-shadow .2s, background .2s, color .2s;
  white-space: nowrap;
}
.btn-gold { background: var(--gold); color: var(--navy); box-shadow: 0 8px 24px rgba(201,162,39,.35); }
.btn-gold:hover { transform: translateY(-2px); box-shadow: 0 14px 32px rgba(201,162,39,.45); }
.btn-ghost { border-color: rgba(255,255,255,.5); color: #fff; }
.btn-ghost:hover { background: rgba(255,255,255,.12); border-color: #fff; }
.btn-block { width: 100%; }

/* ===== 顶部导航 ===== */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(11, 37, 69, .92);
  backdrop-filter: saturate(150%) blur(10px);
  border-bottom: 1px solid rgba(255,255,255,.08);
  transition: background .3s;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { display: flex; align-items: center; gap: 12px; color: #fff; }
.brand-mark { color: var(--gold); display: flex; }
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-text strong { font-size: 19px; letter-spacing: .04em; }
.brand-text em { font-style: normal; font-size: 11px; letter-spacing: .22em; color: var(--gold-soft); text-transform: uppercase; }
.brand-text.light strong { color: #fff; }

.main-nav { display: flex; align-items: center; gap: 30px; }
.main-nav a { color: rgba(255,255,255,.82); font-size: 15px; font-weight: 500; transition: color .2s; }
.main-nav a:hover { color: #fff; }
.nav-cta {
  background: var(--gold); color: var(--navy) !important;
  padding: 9px 20px; border-radius: 999px; font-weight: 700;
}
.nav-cta:hover { background: var(--gold-soft); }

.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { width: 24px; height: 2px; background: #fff; border-radius: 2px; transition: .3s; }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== Hero ===== */
.hero { position: relative; color: #fff; overflow: hidden; }
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background:
    radial-gradient(900px 500px at 85% -10%, rgba(201,162,39,.22), transparent 60%),
    radial-gradient(700px 500px at 0% 100%, rgba(29,78,216,.35), transparent 55%),
    linear-gradient(135deg, var(--navy) 0%, var(--navy-2) 60%, #0a1f3d 100%);
}
.hero-bg::after {
  content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(rgba(255,255,255,.06) 1px, transparent 1px);
  background-size: 28px 28px; opacity: .5;
}
.hero-inner {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 1.2fr .8fr; gap: 48px;
  align-items: center; padding: 96px 0 110px;
}
.hero-copy h1 {
  font-family: var(--font-serif);
  font-size: clamp(34px, 5.2vw, 56px);
  line-height: 1.18; margin: 18px 0 22px; font-weight: 900;
}
.hero-sub { font-size: 18px; color: rgba(255,255,255,.85); max-width: 560px; }
.hero-actions { display: flex; gap: 16px; margin: 34px 0 40px; flex-wrap: wrap; }
.hero-trust { display: flex; gap: 36px; flex-wrap: wrap; }
.hero-trust > div { display: flex; flex-direction: column; }
.hero-trust strong { font-size: 30px; color: var(--gold-soft); font-family: var(--font-serif); }
.hero-trust span { font-size: 14px; color: rgba(255,255,255,.7); }

.hero-card {
  background: #fff; color: var(--ink);
  border-radius: 20px; padding: 26px;
  box-shadow: var(--shadow-lg);
  transform: rotate(.6deg);
}
.hero-card-head { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--muted); font-weight: 600; margin-bottom: 16px; }
.hero-card-head .dot { width: 9px; height: 9px; border-radius: 50%; background: #22c55e; box-shadow: 0 0 0 4px rgba(34,197,94,.18); }
.hero-card-q { background: var(--bg-alt); padding: 12px 16px; border-radius: 14px 14px 14px 4px; font-weight: 600; margin-bottom: 14px; }
.hero-card-a { display: flex; gap: 12px; align-items: flex-start; }
.hero-card-a .avatar { flex: 0 0 36px; width: 36px; height: 36px; border-radius: 50%; background: var(--navy); color: #fff; display: grid; place-items: center; font-size: 14px; font-weight: 700; }
.hero-card-a p { background: var(--navy); color: #fff; padding: 12px 16px; border-radius: 14px 14px 4px 14px; font-size: 14.5px; }
.hero-card-tags { display: flex; flex-wrap: wrap; gap: 7px; margin: 16px 0 2px; }
.hero-card-tags li { background: var(--bg-alt); color: var(--navy-2); font-size: 12px; font-weight: 600; padding: 4px 11px; border-radius: 999px; }
.hero-card-btn { display: inline-block; margin-top: 16px; color: var(--navy-3); font-weight: 700; font-size: 14px; }

/* ===== Logo 信任带 ===== */
.logos-band { border-bottom: 1px solid var(--line); background: #fff; padding: 30px 0; }
.logos-title { text-align: center; color: var(--muted); font-size: 13px; letter-spacing: .1em; margin-bottom: 16px; }
.logos { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px 36px; }
.logos li { color: #8a94a6; font-weight: 700; font-size: 16px; letter-spacing: .02em; }

/* ===== 卡片通用 ===== */
.grid { display: grid; gap: 24px; }
.card {
  background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius); padding: 30px;
  box-shadow: var(--shadow); position: relative;
  transition: transform .25s, box-shadow .25s, border-color .25s;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: rgba(201,162,39,.4); }

/* ===== 服务 ===== */
.services-grid { grid-template-columns: repeat(3, 1fr); }
.service-card.highlight { border-color: rgba(201,162,39,.55); box-shadow: 0 18px 44px rgba(201,162,39,.18); }
.svc-icon {
  width: 56px; height: 56px; border-radius: 14px;
  display: grid; place-items: center; margin-bottom: 18px;
  background: linear-gradient(135deg, var(--navy), var(--navy-3));
  color: var(--gold-soft);
}
.svc-icon svg { width: 28px; height: 28px; fill: none; stroke: currentColor; stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; }
.service-card.highlight .svc-icon { background: linear-gradient(135deg, var(--gold), #a9851a); color: #fff; }
.service-card h3 { font-size: 21px; color: var(--navy); margin-bottom: 10px; }
.svc-en { display: block; font-size: 12px; font-weight: 600; letter-spacing: .06em; color: var(--gold); margin-top: 3px; }
.service-card > p { color: var(--muted); font-size: 14.5px; margin-bottom: 18px; }
.svc-list { display: flex; flex-direction: column; gap: 12px; }
.svc-list li { position: relative; padding-left: 22px; font-size: 13px; color: var(--muted); line-height: 1.55; }
.svc-list li b { display: block; color: var(--navy); font-weight: 700; font-size: 14px; margin-bottom: 1px; }
.svc-list li::before { content: "✓"; position: absolute; left: 0; top: 1px; color: var(--gold); font-weight: 800; }
.card-tag {
  position: absolute; top: 18px; right: 18px;
  background: var(--gold); color: var(--navy);
  font-size: 12px; font-weight: 700; padding: 4px 12px; border-radius: 999px;
}

/* ===== 数据带 ===== */
.stats-band { background: linear-gradient(135deg, var(--navy), var(--navy-2)); color: #fff; padding: 64px 0; }
.stats-inner { display: grid; grid-template-columns: repeat(5, 1fr); gap: 24px; text-align: center; }
.stat strong { display: block; font-family: var(--font-serif); font-size: clamp(34px, 5vw, 52px); color: var(--gold-soft); line-height: 1; }
.stat span { color: rgba(255,255,255,.78); font-size: 15px; }

/* ===== 案例 ===== */
.cases-grid { grid-template-columns: repeat(3, 1fr); }
.case-card { display: flex; flex-direction: column; }
.case-badge { align-self: flex-start; font-size: 12.5px; font-weight: 700; padding: 5px 13px; border-radius: 999px; margin-bottom: 14px; }
.badge-green { background: #e7f7ee; color: #167c45; }
.badge-blue { background: #e7f0ff; color: #1d4ed8; }
.badge-gold { background: #fbf2d6; color: #8a6d12; }
.badge-purple { background: #f1e9fd; color: #6d28d9; }
.badge-teal { background: #e0f5f5; color: #0e7490; }
.badge-orange { background: #fdeede; color: #c2540a; }
.case-card h3 { font-size: 19px; color: var(--navy); margin-bottom: 10px; }
.case-desc { color: var(--muted); font-size: 14.5px; flex: 1; }
.case-meta { display: flex; gap: 16px; flex-wrap: wrap; margin: 16px 0 14px; font-size: 13.5px; color: var(--ink); font-weight: 600; }
.case-result {
  background: var(--bg-alt); border-left: 3px solid var(--gold);
  padding: 12px 14px; border-radius: 0 10px 10px 0;
  font-size: 14px; font-weight: 600; color: var(--navy);
}

/* ===== 团队 ===== */
.team-grid { grid-template-columns: repeat(4, 1fr); }
.team-card { text-align: center; }
.avatar-lg {
  position: relative; overflow: hidden;
  width: 84px; height: 84px; border-radius: 50%;
  margin: 0 auto 18px; display: grid; place-items: center;
  font-family: var(--font-serif); font-size: 34px; font-weight: 700; color: #fff;
  background: linear-gradient(135deg, var(--c1, var(--navy-3)), var(--c2, var(--navy)));
  box-shadow: 0 10px 24px rgba(11,37,69,.2);
}
/* 有头像图片时铺满圆形；图片加载失败会被移除，自动回退到下面的字母 */
.avatar-lg img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: 50% 20%; }
.avatar-lg span { position: relative; z-index: 0; }
.team-card h3 { font-size: 19px; color: var(--navy); }
.team-role { color: var(--gold); font-weight: 700; font-size: 14px; margin-bottom: 12px; }
.team-bio { color: var(--muted); font-size: 14px; margin-bottom: 16px; }
.team-tags { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
.team-tags li { background: var(--bg-alt); color: var(--navy-2); font-size: 12.5px; padding: 4px 11px; border-radius: 999px; font-weight: 600; }

/* ===== 流程 ===== */
.process { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; counter-reset: step; }
.process-step { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 30px 26px; position: relative; }
.step-num { font-family: var(--font-serif); font-size: 40px; font-weight: 900; color: rgba(201,162,39,.35); line-height: 1; }
.process-step h3 { font-size: 19px; color: var(--navy); margin: 8px 0 10px; }
.process-step p { color: var(--muted); font-size: 14.5px; }
.process-step::after {
  content: "→"; position: absolute; right: -18px; top: 50%; transform: translateY(-50%);
  color: var(--gold); font-size: 22px; font-weight: 700;
}
.process-step:last-child::after { display: none; }

/* ===== 关于 ===== */
.about-inner { display: grid; grid-template-columns: 1.1fr .9fr; gap: 56px; align-items: center; }
.about-copy h2 { font-family: var(--font-serif); font-size: clamp(28px,4vw,40px); color: var(--navy); margin: 12px 0 18px; }
.about-copy p { color: var(--muted); font-size: 16.5px; margin-bottom: 16px; }
.about-points { display: flex; gap: 14px; margin-top: 26px; flex-wrap: wrap; }
.about-points li { flex: 1; min-width: 130px; background: var(--bg-alt); border-radius: 12px; padding: 16px; }
.about-points b { display: block; color: var(--gold); font-size: 18px; }
.about-points span { font-size: 13.5px; color: var(--muted); }
.about-visual { display: flex; }
.about-quote {
  background: linear-gradient(135deg, var(--navy), var(--navy-2));
  color: #fff; border-radius: 22px; padding: 44px 36px; width: 100%;
  position: relative; box-shadow: var(--shadow-lg);
}
.about-quote::before { content: "“"; position: absolute; top: 8px; left: 22px; font-family: var(--font-serif); font-size: 90px; color: rgba(201,162,39,.4); line-height: 1; }
.about-quote p { font-family: var(--font-serif); font-size: 23px; line-height: 1.5; margin: 24px 0 18px; }
.about-quote strong { color: var(--gold-soft); }
.about-quote span { color: rgba(255,255,255,.7); font-size: 14px; }

/* ===== 联系 ===== */
.contact { background: linear-gradient(135deg, var(--navy) 0%, var(--navy-2) 100%); color: #fff; }
.contact-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: start; }
.contact-copy h2 { font-family: var(--font-serif); font-size: clamp(28px,4vw,40px); margin: 12px 0 16px; }
.contact-copy > p { color: rgba(255,255,255,.82); font-size: 17px; margin-bottom: 26px; }
.contact-benefits { display: flex; flex-direction: column; gap: 18px; }
.contact-benefits li { display: flex; align-items: flex-start; gap: 14px; }
.contact-benefits .cb-ic {
  flex: 0 0 44px; width: 44px; height: 44px; border-radius: 12px;
  display: grid; place-items: center; font-size: 20px;
  background: rgba(201,162,39,.16); border: 1px solid rgba(201,162,39,.35);
}
.contact-benefits b { display: block; font-size: 16px; color: #fff; }
.contact-benefits span { font-size: 14px; color: rgba(255,255,255,.72); }

.contact-form { background: #fff; color: var(--ink); border-radius: 20px; padding: 32px; box-shadow: var(--shadow-lg); }
.contact-form label { display: block; font-size: 14px; font-weight: 600; color: var(--navy); margin-bottom: 16px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.contact-form input, .contact-form select, .contact-form textarea {
  width: 100%; margin-top: 7px; padding: 12px 14px;
  border: 1.5px solid var(--line); border-radius: 10px;
  font-family: inherit; font-size: 15px; color: var(--ink); background: #fff;
  transition: border-color .2s, box-shadow .2s;
}
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus {
  outline: none; border-color: var(--gold); box-shadow: 0 0 0 3px rgba(201,162,39,.18);
}
.contact-form textarea { resize: vertical; }
.form-note { margin-top: 14px; font-weight: 700; font-size: 14.5px; text-align: center; min-height: 20px; }
.form-note.ok { color: #167c45; }
.form-note.err { color: #c2410c; }
.form-hint { margin-top: 12px; font-size: 12.5px; color: var(--muted); text-align: center; }

/* ===== 页脚 ===== */
.site-footer { background: #081a32; color: rgba(255,255,255,.72); padding: 60px 0 26px; }
.footer-inner { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 32px; padding-bottom: 36px; border-bottom: 1px solid rgba(255,255,255,.1); }
.footer-brand .brand-text { margin-bottom: 12px; }
.footer-brand p { font-size: 14px; max-width: 280px; }
.footer-col h4 { color: #fff; font-size: 15px; margin-bottom: 14px; }
.footer-col a { display: block; font-size: 14px; margin-bottom: 9px; color: rgba(255,255,255,.7); transition: color .2s; }
.footer-col a:hover { color: var(--gold-soft); }
.footer-bottom { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; padding-top: 22px; font-size: 13px; color: rgba(255,255,255,.5); }

/* ===== 悬浮按钮 ===== */
.fab {
  position: fixed; right: 22px; bottom: 22px; z-index: 40;
  background: var(--gold); color: var(--navy);
  padding: 14px 22px; border-radius: 999px; font-weight: 800; font-size: 15px;
  box-shadow: 0 12px 30px rgba(201,162,39,.45);
  transition: transform .2s;
}
.fab:hover { transform: scale(1.05); }

/* ===== 滚动揭示动画 ===== */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ===== 响应式 ===== */
@media (max-width: 960px) {
  .services-grid, .cases-grid { grid-template-columns: repeat(2, 1fr); }
  .team-grid, .process { grid-template-columns: repeat(2, 1fr); }
  .process-step::after { display: none; }
  .hero-inner { grid-template-columns: 1fr; gap: 40px; padding: 64px 0 80px; }
  .hero-card { max-width: 440px; }
  .about-inner, .contact-inner { grid-template-columns: 1fr; gap: 36px; }
  .stats-inner { grid-template-columns: repeat(2, 1fr); gap: 32px; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .section { padding: 64px 0; }
  .main-nav {
    position: absolute; top: 72px; left: 0; right: 0;
    background: var(--navy); flex-direction: column; align-items: stretch;
    gap: 0; padding: 8px 0; max-height: 0; overflow: hidden; transition: max-height .3s;
    border-bottom: 1px solid rgba(255,255,255,.1);
  }
  .main-nav.open { max-height: 420px; }
  .main-nav a { padding: 13px 24px; }
  .nav-cta { margin: 8px 24px; text-align: center; }
  .nav-toggle { display: flex; }
  .services-grid, .cases-grid, .team-grid, .process { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
  .fab { right: 14px; bottom: 14px; padding: 12px 18px; }
  .hero-trust { gap: 24px; }
}