/* 鼎衡 Equilibra 官网 —— 纯静态，无构建步骤 */
:root {
  --bg: #0b1020;
  --bg-alt: #0f1630;
  --panel: #141c3a;
  --line: #243056;
  --text: #e7ebf6;
  --muted: #9aa5c4;
  --gold: #d9b26a;
  --gold-2: #f1d699;
  --bid: #2fbf8f;
  --ask: #e2626b;
  --radius: 14px;
  --serif: "Noto Serif SC", "Songti SC", serif;
  --sans: "Inter", -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font-family: var(--sans); font-size: 16px; line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
h1, h2, h3 { margin: 0; line-height: 1.3; }
p { margin: 0; }

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.wrap.narrow { max-width: 780px; }
.center { text-align: center; }

/* nav */
.nav {
  position: sticky; top: 0; z-index: 10;
  background: rgba(11, 16, 32, .82); backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(36, 48, 86, .6);
}
.nav-in { display: flex; align-items: center; gap: 28px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; }
.brand-cn { font-family: var(--serif); font-size: 20px; font-weight: 700; letter-spacing: .08em; }
.brand-en { color: var(--muted); font-size: 13px; letter-spacing: .14em; text-transform: uppercase; }
.brand.small .brand-cn { font-size: 16px; }
.nav-links { display: flex; gap: 22px; margin-left: auto; font-size: 15px; color: var(--muted); }
.nav-links a:hover { color: var(--text); }

/* buttons */
.btn {
  display: inline-block; padding: 12px 26px; border-radius: 999px;
  background: linear-gradient(135deg, var(--gold), var(--gold-2)); color: #1a1406;
  font-weight: 600; font-size: 15px; transition: transform .15s, box-shadow .15s;
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 8px 24px rgba(217, 178, 106, .25); }
.btn-sm { padding: 8px 18px; font-size: 14px; }
.btn-ghost { background: transparent; color: var(--text); border: 1px solid var(--line); }
.btn-ghost:hover { border-color: var(--gold); box-shadow: none; }

/* hero */
.hero {
  padding: 96px 0 88px;
  background:
    radial-gradient(800px 400px at 85% 10%, rgba(217, 178, 106, .10), transparent 60%),
    radial-gradient(700px 500px at 0% 100%, rgba(47, 191, 143, .07), transparent 60%);
}
.hero-in { display: grid; grid-template-columns: 1.15fr .85fr; gap: 56px; align-items: center; }
.eyebrow { color: var(--gold); font-size: 14px; letter-spacing: .2em; margin-bottom: 18px; }
.hero h1 { font-family: var(--serif); font-size: 46px; font-weight: 700; letter-spacing: .02em; }
.hl { background: linear-gradient(90deg, var(--gold), var(--gold-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lead { color: var(--muted); font-size: 17px; margin: 22px 0 32px; max-width: 560px; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-points { display: flex; gap: 22px; flex-wrap: wrap; list-style: none; padding: 0; margin: 32px 0 0; color: var(--muted); font-size: 14px; }
.hero-points li::before { content: "◆"; color: var(--gold); font-size: 10px; margin-right: 8px; vertical-align: 2px; }

/* order book mock */
.book {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px 18px 12px; font-variant-numeric: tabular-nums; font-size: 14px;
  box-shadow: 0 30px 60px rgba(0, 0, 0, .35);
}
.book-head, .row, .mid { display: flex; justify-content: space-between; padding: 5px 10px; }
.book-head { color: var(--muted); font-size: 12px; border-bottom: 1px solid var(--line); margin-bottom: 6px; }
.row { position: relative; border-radius: 4px; }
.row::before { content: ""; position: absolute; inset: 1px 0 1px auto; width: var(--w); border-radius: 4px; opacity: .16; }
.row span { position: relative; }
.ask span:first-child { color: var(--ask); }
.ask::before { background: var(--ask); }
.bid span:first-child { color: var(--bid); }
.bid::before { background: var(--bid); }
.mid { margin: 6px 0; padding: 10px; border-top: 1px dashed var(--line); border-bottom: 1px dashed var(--line); font-weight: 600; font-size: 17px; }
.spread { color: var(--gold); font-size: 13px; font-weight: 500; align-self: center; }
.book-note { color: var(--muted); font-size: 11px; text-align: right; margin-top: 8px; opacity: .7; }

/* sections */
.section { padding: 88px 0; }
.section.alt { background: var(--bg-alt); }
.sec-title { font-family: var(--serif); font-size: 32px; text-align: center; margin-bottom: 14px; }
.sec-sub { color: var(--muted); text-align: center; max-width: 640px; margin: 0 auto 44px; }
.sec-title.left, .sec-sub.left { text-align: left; margin-left: 0; }

.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 40px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }

.card, .feature, .plan {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px;
}
.card h3, .feature h3 { font-size: 18px; margin-bottom: 10px; }
.card p, .feature p { color: var(--muted); font-size: 15px; }
.ico { width: 40px; height: 40px; border-radius: 10px; display: grid; place-items: center; margin-bottom: 16px;
  background: rgba(217, 178, 106, .12); color: var(--gold); font-size: 18px; }
.feature { border-left: 3px solid var(--gold); }

/* case */
.case { margin-top: 28px; padding: 28px; border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(217, 178, 106, .12), rgba(47, 191, 143, .06)); border: 1px solid rgba(217, 178, 106, .3); }
.case-label { color: var(--gold); font-size: 13px; letter-spacing: .1em; margin-bottom: 8px; }
.case > p { color: var(--muted); }
.case-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 18px; }
.case-stats b { display: block; font-size: 24px; font-variant-numeric: tabular-nums; }
.case-stats span { color: var(--muted); font-size: 14px; }

/* report */
.report-in { display: grid; grid-template-columns: 1.1fr .9fr; gap: 56px; align-items: center; }
.checks { list-style: none; padding: 0; margin: 0; }
.checks li { padding: 10px 0 10px 30px; position: relative; color: var(--muted); border-bottom: 1px solid rgba(36, 48, 86, .6); }
.checks li::before { content: "✓"; position: absolute; left: 0; color: var(--bid); font-weight: 700; }
.checks b { color: var(--text); font-weight: 600; }
.kpi-mock { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.kpi-head { font-weight: 600; margin-bottom: 12px; }
.kpi-row { display: grid; grid-template-columns: 1fr auto auto; gap: 14px; align-items: center; padding: 14px 0; border-top: 1px solid var(--line); }
.kpi-row span { color: var(--muted); }
.kpi-row b { font-size: 20px; font-variant-numeric: tabular-nums; }
.kpi-row em { font-style: normal; font-size: 13px; }
.ok { color: var(--bid); }
.kpi-note { color: var(--muted); font-size: 12px; margin-top: 10px; opacity: .8; }

/* steps */
.steps { list-style: none; padding: 0; margin: 40px 0 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: s; }
.steps li { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; position: relative; }
.steps .n { display: inline-grid; place-items: center; width: 34px; height: 34px; border-radius: 50%;
  border: 1px solid var(--gold); color: var(--gold); font-weight: 600; margin-bottom: 14px; }
.steps h3 { font-size: 18px; margin-bottom: 8px; }
.steps p { color: var(--muted); font-size: 15px; }

/* pricing */
.pricing { margin-top: 0; }
.plan { text-align: center; position: relative; }
.plan h3 { font-size: 16px; color: var(--muted); font-weight: 500; }
.price { margin: 14px 0 6px; }
.price b { font-size: 40px; font-variant-numeric: tabular-nums; }
.price span { color: var(--muted); margin-left: 4px; }
.plan p { color: var(--muted); font-size: 14px; }
.plan.featured { border-color: var(--gold); box-shadow: 0 0 0 1px rgba(217, 178, 106, .3) inset; }
.tag { position: absolute; top: -11px; left: 50%; transform: translateX(-50%); background: var(--gold); color: #1a1406;
  font-size: 12px; font-weight: 600; padding: 2px 12px; border-radius: 999px; }
.fine { color: var(--muted); font-size: 13px; text-align: center; margin-top: 22px; }

/* faq */
details { border-bottom: 1px solid var(--line); padding: 18px 4px; }
details:first-of-type { border-top: 1px solid var(--line); margin-top: 32px; }
summary { cursor: pointer; font-weight: 600; list-style: none; position: relative; padding-right: 28px; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; position: absolute; right: 4px; top: -2px; color: var(--gold); font-size: 22px; font-weight: 400; transition: transform .2s; }
details[open] summary::after { transform: rotate(45deg); }
details p { color: var(--muted); margin-top: 12px; }

/* contact */
.contact { background:
  radial-gradient(600px 300px at 50% 0%, rgba(217, 178, 106, .12), transparent 70%), var(--bg-alt); }
.contact .sec-sub { margin-bottom: 30px; }
.contact-row { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* footer */
.foot { border-top: 1px solid var(--line); padding: 40px 0; }
.foot-in { display: grid; gap: 14px; }
.disclaimer { color: var(--muted); font-size: 13px; max-width: 820px; }
.copy { color: var(--muted); font-size: 13px; opacity: .7; }

/* responsive */
@media (max-width: 960px) {
  .hero-in, .report-in { grid-template-columns: 1fr; gap: 40px; }
  .grid-4, .steps { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .nav-links { display: none; }
  .nav .btn-sm { margin-left: auto; }
}
@media (max-width: 600px) {
  .wrap { padding: 0 16px; }
  .hero { padding: 64px 0; }
  .hero h1 { font-size: 32px; }
  .section { padding: 64px 0; }
  .sec-title { font-size: 26px; }
  .grid-4, .grid-3, .grid-2, .steps, .case-stats { grid-template-columns: 1fr; }
  .brand-en { display: none; }
}