:root {
  --navy: #0b2a4a;
  --navy-deep: #071e33;
  --navy-soft: #12395f;
  --gold: #c9a45c;
  --gold-light: #ddc08a;
  --gold-deep: #a07f3f;
  --bg: #f5f7fa;
  --card: #ffffff;
  --ink: #1f2a37;
  --ink-soft: #5b6675;
  --line: #e4e8ee;
  --shadow: 0 18px 50px rgba(7, 30, 51, 0.14);
  --shadow-hover: 0 26px 64px rgba(7, 30, 51, 0.22);
  --serif: "Songti SC", "Noto Serif SC", Georgia, "Times New Roman", serif;
  --sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

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

.container { width: min(1180px, 92%); margin: 0 auto; }
section { padding: 96px 0; }
.page-hero { padding-top: 76px; }

.section-tag {
  display: inline-flex; align-items: center; gap: 10px; font-size: 13px; letter-spacing: 3px;
  color: var(--gold-deep); font-weight: 600; margin-bottom: 18px; text-transform: uppercase;
}
.section-tag::before { content: ""; width: 36px; height: 1px; background: var(--gold); }
.section-title { font-family: var(--serif); font-size: clamp(28px, 3.6vw, 40px); font-weight: 700; color: var(--navy-deep); line-height: 1.3; margin-bottom: 16px; }
.section-sub { color: var(--ink-soft); font-size: 16px; max-width: 680px; margin-bottom: 48px; }

/* 站内页顶部横幅 */
.page-banner {
  background: linear-gradient(140deg, var(--navy-deep) 0%, var(--navy) 55%, var(--navy-soft) 100%);
  color: #fff; padding: 140px 0 70px; position: relative; overflow: hidden;
}
.page-banner::before { content:""; position:absolute; inset:0; opacity:.5; background-image: linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px); background-size: 60px 60px; }
.page-banner::after { content:""; position:absolute; right:-120px; top:-80px; width:400px; height:400px; border-radius:50%; border:1px solid rgba(201,164,92,.25); }
.page-banner .container { position: relative; z-index: 2; }
.page-banner .tag { color: var(--gold-light); letter-spacing: 3px; font-size: 13px; margin-bottom: 14px; display: inline-flex; gap: 10px; align-items: center; }
.page-banner .tag::before { content:""; width: 34px; height: 1px; background: var(--gold); }
.page-banner h1 { font-family: var(--serif); font-size: clamp(30px, 4.4vw, 46px); margin-bottom: 16px; }
.page-banner p { color: rgba(255,255,255,.8); max-width: 640px; font-size: 16px; }

/* 导航 */
header.nav { position: fixed; top: 0; left: 0; width: 100%; z-index: 100; background: rgba(11, 42, 74, 0.98); backdrop-filter: blur(12px); transition: box-shadow .35s ease, background .35s ease; }
header.nav.scrolled { box-shadow: 0 6px 24px rgba(7, 30, 51, 0.35); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 76px; }
.logo { display: flex; align-items: center; gap: 12px; color: #fff; }
.logo-mark { width: 42px; height: 42px; border-radius: 10px; background: linear-gradient(135deg, var(--gold-light), var(--gold-deep)); display: grid; place-items: center; font-weight: 800; color: var(--navy-deep); font-size: 18px; box-shadow: 0 6px 16px rgba(201, 164, 92, 0.4); }
.logo-name { font-family: var(--serif); font-weight: 700; font-size: 20px; letter-spacing: 1px; }
.logo-name small { display: block; font-size: 10px; font-weight: 400; letter-spacing: 4px; color: var(--gold-light); margin-top: 2px; }
.nav-links { display: flex; align-items: center; gap: 26px; }
.nav-links a { color: rgba(255,255,255,.85); font-size: 14.5px; font-weight: 500; transition: color .25s; position: relative; padding: 6px 0; white-space: nowrap; }
.nav-links a::after { content:""; position:absolute; left:0; bottom:0; width:0; height:2px; background:var(--gold); transition: width .3s ease; }
.nav-links a:hover, .nav-links a.active { color:#fff; }
.nav-links a:hover::after, .nav-links a.active::after { width:100%; }
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; background: none; border: none; padding: 6px; }
.hamburger span { width: 26px; height: 2px; background: #fff; transition: .3s; border-radius: 2px; }
.mobile-menu { display: none; background: var(--navy); border-top: 1px solid rgba(255,255,255,.08); padding: 16px 6% 24px; flex-direction: column; }
.mobile-menu.open { display: flex; }
.mobile-menu a { color: rgba(255,255,255,.88); padding: 12px 4px; font-size: 15px; border-bottom: 1px solid rgba(255,255,255,.07); }

/* 按钮 */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 15px 34px; border-radius: 8px; font-size: 16px; font-weight: 700; cursor: pointer; transition: transform .28s ease, box-shadow .28s ease, background .28s; border: none; }
.btn-gold { background: linear-gradient(135deg, var(--gold-light), var(--gold-deep)); color: #18263a; box-shadow: 0 14px 30px rgba(201,164,92,.4); }
.btn-gold:hover { transform: translateY(-4px); box-shadow: 0 20px 40px rgba(201,164,92,.55); }
.btn-outline { background: transparent; color: #fff; border: 1.5px solid rgba(255,255,255,.5); backdrop-filter: blur(4px); }
.btn-outline:hover { transform: translateY(-4px); border-color: var(--gold); color: var(--gold-light); box-shadow: 0 14px 30px rgba(0,0,0,.25); }
.btn-navy { background: var(--navy); color: #fff; box-shadow: 0 14px 30px rgba(11,42,74,.35); }
.btn-navy:hover { transform: translateY(-4px); box-shadow: 0 20px 40px rgba(11,42,74,.5); }
.btn-submit { width: 100%; margin-top: 8px; }

/* 表单 */
.form-wrap { background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 42px; box-shadow: var(--shadow); transition: transform .35s ease, box-shadow .35s ease; }
.form-wrap:hover { box-shadow: var(--shadow-hover); }
.form-group { margin-bottom: 20px; }
.form-group.half { }
.form-group label { display: block; font-size: 14px; font-weight: 600; color: var(--navy-deep); margin-bottom: 8px; }
.form-group label .req { color: #c0392b; }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 13px 15px; border: 1.5px solid var(--line); border-radius: 10px; font-size: 14.5px; font-family: var(--sans); color: var(--ink); background: #fbfcfe; transition: border-color .25s, box-shadow .25s; }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { outline: none; border-color: var(--gold); box-shadow: 0 0 0 3px rgba(201,164,92,.18); }
.form-group textarea { min-height: 100px; resize: vertical; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-error { color: #c0392b; font-size: 12.5px; margin-top: 6px; min-height: 0; }
.input-error { border-color: #c0392b !important; }
.form-success { display: none; text-align: center; padding: 40px 20px; }
.form-success.show { display: block; }
.form-success .icon { width: 70px; height: 70px; border-radius: 50%; background: linear-gradient(135deg, var(--gold-light), var(--gold-deep)); display: grid; place-items: center; margin: 0 auto 18px; color: #fff; font-size: 32px; box-shadow: 0 12px 24px rgba(201,164,92,.4); }
.form-success h4 { font-family: var(--serif); font-size: 22px; color: var(--navy-deep); margin-bottom: 8px; }
.form-success p { color: var(--ink-soft); font-size: 14.5px; }

/* 优势亮点 */
.hl-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.hl-item { display: flex; align-items: center; gap: 14px; }
.hl-icon { width: 52px; height: 52px; flex-shrink: 0; border-radius: 12px; display: grid; place-items: center; color: var(--navy); background: linear-gradient(135deg, #eef3fa, #dfe7f2); border: 1px solid var(--line); }
.hl-item h4 { font-size: 15px; font-weight: 700; color: var(--navy-deep); }
.hl-item p { font-size: 12.5px; color: var(--ink-soft); margin-top: 2px; }

/* 页脚 */
footer { background: var(--navy-deep); color: rgba(255,255,255,.7); padding: 60px 0 30px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; margin-bottom: 44px; }
.footer-col h5 { color: #fff; font-size: 15px; font-weight: 700; margin-bottom: 18px; position: relative; padding-bottom: 10px; }
.footer-col h5::after { content:""; position:absolute; left:0; bottom:0; width:24px; height:2px; background:var(--gold); }
.footer-col p, .footer-col li { font-size: 14px; line-height: 2; }
.footer-col li a:hover { color: var(--gold-light); }
.footer-contact li { display: flex; align-items: flex-start; gap: 10px; }
.footer-contact .ci { color: var(--gold); margin-top: 8px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); padding-top: 24px; text-align: center; font-size: 13px; color: rgba(255,255,255,.45); }
.footer-bottom .footer-admin a { color: rgba(201,164,92,.8); text-decoration: none; border: 1px solid rgba(201,164,92,.35); padding: 2px 12px; border-radius: 20px; font-size: 12px; transition: color .3s, border-color .3s, background .3s; }
.footer-bottom .footer-admin a:hover { color: #fff; border-color: var(--gold-light); background: rgba(201,164,92,.18); }

/* 回顶 */
.to-top { position: fixed; right: 28px; bottom: 30px; width: 48px; height: 48px; border-radius: 50%; background: linear-gradient(135deg, var(--navy), var(--navy-deep)); color: var(--gold-light); border: 1px solid rgba(201,164,92,.4); cursor: pointer; display: grid; place-items: center; font-size: 20px; z-index: 90; opacity: 0; pointer-events: none; transition: opacity .3s, transform .3s; box-shadow: var(--shadow); }
.to-top.show { opacity: 1; pointer-events: auto; }
.to-top:hover { transform: translateY(-4px); }

.reveal { opacity: 0; transform: translateY(30px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }

@media (max-width: 1024px) {
  .hl-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 820px) {
  .nav-links { display: none; }
  .nav-cta { display: none; }
  .hamburger { display: flex; }
  section { padding: 70px 0; }
  .form-row { grid-template-columns: 1fr; }
  .hl-grid { grid-template-columns: repeat(2, 1fr); }
  .form-wrap { padding: 28px 24px; }
  .page-banner { padding: 120px 0 60px; }
}
@media (max-width: 480px) { .hl-grid { grid-template-columns: 1fr; } .footer-grid { grid-template-columns: 1fr; } }