/* 金叶 OS 全站共享样式 */
:root{
  --ink:#0B1D3A; --ink2:#102445; --ink3:#16315C;
  --gold:#C9A96E; --gold-soft:#E2CC99; --gold-deep:#A9894F;
  --paper:#F6F3EC; --paper2:#EFE9DC; --paper-ink:#18263F; --paper-muted:#5C6779;
  --muted:#93A0B5; --line:rgba(201,169,110,.2); --line-strong:rgba(201,169,110,.4);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  background:var(--ink);color:#EAEFF7;line-height:1.7;-webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{font-weight:700;line-height:1.3;letter-spacing:.01em}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:1100px;margin:0 auto;padding:0 24px}
.serif{font-family:Georgia,"Songti SC","SimSun",serif}

/* 导航 */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(11,29,58,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px}
.brand img{height:32px;width:32px;border-radius:6px}
.brand small{display:block;font-size:10px;color:var(--gold);letter-spacing:.15em;font-weight:400;margin-top:1px}
.nav-links{display:flex;gap:4px;align-items:center}
.nav-links a{padding:8px 14px;font-size:15px;color:#C6D0E0;border-radius:4px;transition:.2s}
.nav-links a:hover{color:#fff;background:rgba(255,255,255,.05)}
.nav-cta{margin-left:8px;padding:8px 18px;font-size:14px;font-weight:500;border:1px solid var(--gold);color:var(--gold-soft);border-radius:4px}
.nav-cta:hover{background:var(--gold);color:var(--ink)}
.nav-toggle{display:none;background:none;border:1px solid var(--line);color:#fff;padding:6px 10px;font-size:20px;cursor:pointer}

/* 按钮 */
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 28px;font-size:16px;font-weight:500;border-radius:4px;cursor:pointer;border:1px solid transparent;transition:.2s;font-family:inherit}
.btn-gold{background:var(--gold);color:var(--ink);font-weight:700}
.btn-gold:hover{background:var(--gold-soft)}
.btn-ghost{border-color:var(--line-strong);color:#EAEFF7;background:transparent}
.btn-ghost:hover{border-color:var(--gold);color:var(--gold-soft)}

/* 区块 */
.hero{padding:140px 0 80px}
.band-dark{background:var(--ink);padding:80px 0}
.band-paper{background:var(--paper);color:var(--paper-ink);padding:80px 0}
.band-gold{background:var(--gold-deep);padding:60px 0}
h2{font-size:32px;margin-bottom:16px}
.lead{font-size:17px;color:var(--muted);max-width:680px}
.center{text-align:center}
.center .lead{margin:0 auto}

/* 卡片 */
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:40px}
.card{padding:36px;border:1px solid var(--line);border-radius:8px}
.card h3{font-size:22px;margin-bottom:12px}
.card p{color:#C6D0E0}
.band-paper .card{border-color:rgba(169,137,79,.2);background:#fff}
.band-paper .card p{color:var(--paper-muted)}

/* 对比表 */
.cmp{width:100%;border-collapse:collapse;margin-top:40px;font-size:16px;max-width:800px;margin-left:auto;margin-right:auto}
.cmp th,.cmp td{padding:18px 16px;text-align:center}
.cmp thead th{border-bottom:1px solid var(--line-strong);font-weight:400;color:var(--muted)}
.cmp thead th:last-child{color:var(--gold-soft);font-weight:700}
.cmp tbody tr{border-bottom:1px solid var(--line)}
.cmp tbody td:first-child{color:var(--muted);text-align:left}
.cmp tbody td:last-child{color:#fff;font-weight:700}

/* 四宫格 */
.grid4{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:40px}
.grid4 .item{padding:28px;border:1px solid var(--line);border-radius:8px}
.grid4 .item h3{font-size:20px;margin-bottom:8px;color:#fff}
.grid4 .item p{color:#C6D0E0}
.band-paper .grid4 .item{border-left:3px solid var(--gold-deep);background:#fff;border-top:1px solid rgba(169,137,79,.15);border-right:1px solid rgba(169,137,79,.15);border-bottom:1px solid rgba(169,137,79,.15)}
.band-paper .grid4 .item h3{color:var(--gold-deep)}
.band-paper .grid4 .item p{color:var(--paper-ink)}

/* 金句 */
.pull{font-size:28px;font-weight:900;line-height:1.6;text-align:center;margin-top:48px}
.band-paper .pull{color:var(--gold-deep)}
.band-dark .pull{color:var(--gold-soft)}

/* 页脚四入口 */
.quad{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);margin-top:60px}
.quad a{background:var(--ink);padding:24px;text-align:center;font-size:15px;color:#C6D0E0;transition:.2s}
.quad a:hover{background:var(--ink3);color:var(--gold-soft)}

/* 页脚 */
.footer{background:var(--ink2);padding:48px 0 24px;border-top:1px solid var(--line)}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.5fr;gap:32px;margin-bottom:32px}
.footer h4{font-size:14px;color:var(--gold-soft);margin-bottom:12px;letter-spacing:.1em}
.footer a,.footer p{display:block;font-size:14px;color:var(--muted);padding:3px 0}
.footer a:hover{color:#fff}
.footer-bottom{border-top:1px solid var(--line);padding-top:20px;text-align:center;font-size:13px;color:var(--muted)}

/* 定义段 */
.def{font-size:16px;color:#C6D0E0;max-width:720px;margin:24px 0 0;line-height:1.9}

/* 响应式 */
@media(max-width:768px){
  .nav-links{display:none;position:fixed;top:64px;left:0;right:0;background:var(--ink2);flex-direction:column;padding:16px}
  .nav-links.open{display:flex}
  .nav-toggle{display:block}
  .grid2,.grid4{grid-template-columns:1fr}
  .quad{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  h2{font-size:26px}
  .pull{font-size:22px}
  .cmp{font-size:14px}
  .cmp th,.cmp td{padding:12px 8px}
  .hero{padding:100px 0 60px}
  .roles-grid{grid-template-columns:1fr 1fr !important;gap:24px !important}
}
@media(max-width:480px){
  .roles-grid{grid-template-columns:1fr !important}
}