/* 知序黄金 · 基础样式 v1 */
:root{
  --ink:#1C1B19;
  --ink-2:#4A4740;
  --ink-3:#8A8578;
  --gold:#B08A3E;
  --gold-2:#D9BE86;
  --bg:#FBFAF7;
  --card:#FFFFFF;
  --line:rgba(28,27,25,.09);
  --radius:14px;
  --max:1080px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--ink);line-height:1.7;
  -webkit-font-smoothing:antialiased;
  font-size:16px;
}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--max);margin:0 auto;padding:0 clamp(16px,4vw,32px)}

/* 顶部 */
.topbar{
  position:sticky;top:0;z-index:20;
  background:rgba(251,250,247,.92);
  backdrop-filter:saturate(180%) blur(12px);
  -webkit-backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--line);
}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;height:56px}
.brand{display:flex;align-items:center;gap:9px;font-weight:600;letter-spacing:.02em;font-size:17px}
.brand-mark{
  width:26px;height:26px;border-radius:8px;
  background:linear-gradient(135deg,#D9BE86,#B08A3E);
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-size:13px;font-weight:700;
}
.nav{display:flex;gap:clamp(12px,3vw,26px);font-size:14px;color:var(--ink-2)}
.nav a:hover{color:var(--gold)}

/* 首屏 */
.hero{padding:clamp(36px,7vw,72px) 0 clamp(24px,4vw,40px)}
.hero h1{
  font-size:clamp(26px,5.2vw,42px);line-height:1.28;font-weight:600;letter-spacing:-.01em;
  margin-bottom:14px;max-width:16em;
}
.hero h1 em{font-style:normal;color:var(--gold)}
.hero p{font-size:clamp(14px,2.6vw,16px);color:var(--ink-2);max-width:34em;margin-bottom:26px}

/* 行情卡 */
.quote-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:clamp(18px,3.4vw,26px);box-shadow:0 1px 2px rgba(28,27,25,.04);
}
.quote-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:16px}
.quote-head h2{font-size:15px;font-weight:600}
.quote-head .time{font-size:12px;color:var(--ink-3)}
.quote-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:12px}
.quote-item{background:#FAF8F3;border-radius:10px;padding:14px 16px}
.quote-item .name{font-size:12.5px;color:var(--ink-3);margin-bottom:6px}
.quote-item .num{font-size:clamp(19px,3.6vw,24px);font-weight:600;font-variant-numeric:tabular-nums}
.quote-item .unit{font-size:12px;color:var(--ink-3);margin-left:3px;font-weight:400}
.dash-note{margin-top:14px;font-size:12.5px;color:var(--ink-3);line-height:1.75}

/* 区块 */
section.block{padding:clamp(32px,6vw,56px) 0;border-top:1px solid var(--line)}
.block-title{font-size:clamp(19px,3.4vw,24px);font-weight:600;margin-bottom:8px;letter-spacing:-.01em}
.block-sub{font-size:14px;color:var(--ink-2);margin-bottom:26px;max-width:38em}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 22px 24px;
}
.card h3{font-size:16px;font-weight:600;margin-bottom:8px;display:flex;align-items:center;gap:8px}
.card p{font-size:14px;color:var(--ink-2)}
.card .ico{
  width:30px;height:30px;border-radius:9px;background:#F5EFE1;color:var(--gold);
  display:inline-flex;align-items:center;justify-content:center;font-size:15px;
}

/* 步骤 */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:14px;counter-reset:s}
.step{position:relative;padding-left:42px}
.step::before{
  counter-increment:s;content:counter(s);
  position:absolute;left:0;top:0;width:28px;height:28px;border-radius:50%;
  background:#F5EFE1;color:var(--gold);font-size:13px;font-weight:600;
  display:flex;align-items:center;justify-content:center;
}
.step h4{font-size:15px;font-weight:600;margin-bottom:4px}
.step p{font-size:13.5px;color:var(--ink-2)}

/* 关于 */
.about p{font-size:14.5px;color:var(--ink-2);max-width:44em;margin-bottom:12px}

/* 联系 */
.contact-box{
  background:linear-gradient(135deg,#FBF6EA,#F6EFDD);
  border:1px solid rgba(176,138,62,.22);border-radius:var(--radius);
  padding:clamp(22px,4vw,34px);
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
}
.contact-box h3{font-size:clamp(17px,3vw,20px);font-weight:600;margin-bottom:6px}
.contact-box p{font-size:14px;color:var(--ink-2)}

/* 页脚 */
footer{border-top:1px solid var(--line);padding:30px 0 40px;font-size:12.5px;color:var(--ink-3);line-height:1.9}
.foot-links{display:flex;gap:18px;flex-wrap:wrap;margin-bottom:10px}
.foot-links a{color:var(--ink-2)}
.foot-links a:hover{color:var(--gold)}
.foot-note{max-width:46em}

/* 法务页 */
.legal{padding:clamp(28px,5vw,52px) 0 60px}
.legal h1{font-size:clamp(22px,4vw,30px);font-weight:600;margin-bottom:6px}
.legal .meta{font-size:12.5px;color:var(--ink-3);margin-bottom:28px}
.legal h2{font-size:16px;font-weight:600;margin:26px 0 10px}
.legal p,.legal li{font-size:14.5px;color:var(--ink-2);margin-bottom:10px}
.legal ul{margin-left:20px}

@media (max-width:520px){
  .quote-grid{grid-template-columns:1fr 1fr}
  .nav{gap:14px;font-size:13px}
}