/* BioMysteryBench · 生信工程师指南 — 共享样式 */
:root{
  --bg:#f5f8fb; --surface:#ffffff; --surface-2:#f0f5f9;
  --ink:#15212e; --muted:#5b6b7b; --line:#e2e9f1;
  --brand:#0ea5a4; --brand-d:#0b807f; --blue:#0284c7;
  --accent:#e8890c; --ok:#0f9d58; --no:#d9534f;
  --ink-dark:#0b1622; --ink-dark-2:#103040;
  --radius:14px; --maxw:1040px;
  --mono:ui-monospace,"SF Mono","Cascadia Code",Consolas,"Liberation Mono",monospace;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--sans);color:var(--ink);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}

/* ---- 顶栏 ---- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(11,22,34,.95);backdrop-filter:blur(8px);border-bottom:1px solid #1c2c3a}
.nav{display:flex;align-items:center;gap:8px;flex-wrap:wrap;padding:12px 20px;max-width:var(--maxw);margin:0 auto}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;color:#fff;margin-right:auto;font-size:1.02rem}
.brand .dot{width:11px;height:11px;border-radius:3px;background:linear-gradient(135deg,var(--brand),#36d1cf);box-shadow:0 0 12px rgba(54,209,207,.7)}
.brand small{display:block;font-weight:400;color:#8aa0b2;font-size:.72rem;letter-spacing:.02em}
.nav a.navlink{color:#c7d6e2;padding:6px 11px;border-radius:8px;font-size:.92rem}
.nav a.navlink:hover{color:#fff;background:#18293a;text-decoration:none}
.nav a.navlink[aria-current="page"]{color:#0b1622;background:linear-gradient(135deg,var(--brand),#36d1cf);font-weight:600}

/* ---- Hero ---- */
.hero{background:radial-gradient(1200px 400px at 80% -10%,rgba(14,165,164,.25),transparent),linear-gradient(160deg,var(--ink-dark),var(--ink-dark-2));color:#eaf2f8;padding:64px 0 56px}
.hero h1{font-size:2.3rem;line-height:1.25;margin:.2em 0 .3em;color:#fff;letter-spacing:-.01em}
.hero .lede{font-size:1.12rem;color:#b9cad8;max-width:46em}
.kicker{display:inline-block;font-size:.78rem;letter-spacing:.12em;text-transform:uppercase;color:#5fd0cd;font-weight:700;background:rgba(14,165,164,.12);border:1px solid rgba(14,165,164,.35);padding:4px 12px;border-radius:999px}
.hero .cta{margin-top:26px;display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-block;padding:11px 20px;border-radius:10px;font-weight:600;font-size:.95rem;cursor:pointer;border:1px solid transparent}
.btn-primary{background:linear-gradient(135deg,var(--brand),#2bb6b4);color:#06231f}
.btn-primary:hover{filter:brightness(1.07);text-decoration:none}
.btn-ghost{background:transparent;border-color:#2c4456;color:#cfe0ec}
.btn-ghost:hover{background:#16293a;text-decoration:none}

/* ---- 通用 section ---- */
main{padding:48px 0 24px}
.section{margin:0 0 52px}
.section h2{font-size:1.55rem;margin:0 0 6px;letter-spacing:-.01em}
.section .sub{color:var(--muted);margin:0 0 22px;font-size:1.02rem}
h3{font-size:1.16rem;margin:1.6em 0 .5em}
.eyebrow{color:var(--brand-d);font-weight:700;font-size:.8rem;letter-spacing:.1em;text-transform:uppercase}
.lead{font-size:1.12rem;color:#33424f}

/* ---- 数字带 ---- */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px;margin:28px 0}
.stat{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:18px 16px;text-align:center}
.stat .num{font-size:1.9rem;font-weight:800;color:var(--brand-d);line-height:1.1}
.stat .lbl{color:var(--muted);font-size:.86rem;margin-top:4px}

/* ---- 卡片 ---- */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;transition:transform .15s,box-shadow .15s}
.card:hover{transform:translateY(-3px);box-shadow:0 10px 30px rgba(15,33,48,.08)}
.card .ic{width:38px;height:38px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:1.2rem;background:linear-gradient(135deg,rgba(14,165,164,.15),rgba(2,132,199,.12));margin-bottom:12px}
.card h3{margin:.2em 0 .4em;font-size:1.08rem}
.card p{margin:0;color:#41525f;font-size:.95rem}
.card.num-card{counter-increment:step}
.card.num-card .ic::before{content:counter(step);font-weight:800;color:var(--brand-d)}
.use-list{counter-reset:step}

/* ---- 表格 ---- */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface)}
table{border-collapse:collapse;width:100%;font-size:.92rem;min-width:560px}
th,td{text-align:left;padding:11px 14px;border-bottom:1px solid var(--line);vertical-align:top}
thead th{background:var(--surface-2);font-weight:700;color:#28384a;position:sticky;top:0}
tbody tr:last-child td{border-bottom:none}
tbody tr:hover{background:#f7fbfc}

/* ---- 徽章 ---- */
.badge{display:inline-block;padding:2px 9px;border-radius:999px;font-size:.78rem;font-weight:600;white-space:nowrap}
.badge.yes{background:rgba(15,157,88,.13);color:#0c7a45;border:1px solid rgba(15,157,88,.3)}
.badge.no{background:rgba(217,83,79,.12);color:#b23b37;border:1px solid rgba(217,83,79,.3)}
.badge.mod{background:rgba(2,132,199,.1);color:#0369a1;border:1px solid rgba(2,132,199,.25)}

/* ---- 提示框 ---- */
.callout{border-left:4px solid var(--brand);background:var(--surface);border:1px solid var(--line);border-left-width:4px;border-radius:10px;padding:16px 18px;margin:20px 0}
.callout.warn{border-left-color:var(--accent)}
.callout.warn .t{color:#a4630a}
.callout .t{font-weight:700;margin-bottom:4px;color:var(--brand-d)}
.callout p:last-child{margin-bottom:0}

/* ---- 代码/标识 ---- */
code,.mono{font-family:var(--mono);font-size:.88em;background:var(--surface-2);padding:1px 6px;border-radius:6px;color:#0b4f63}
pre{background:var(--ink-dark);color:#d6e6f2;padding:16px 18px;border-radius:12px;overflow-x:auto;font-family:var(--mono);font-size:.85rem;line-height:1.55}
pre code{background:none;padding:0;color:inherit}

/* ---- 样例题卡 ---- */
.q-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px;margin-bottom:16px}
.q-head{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:8px}
.q-id{font-family:var(--mono);font-size:.82rem;background:var(--ink-dark);color:#5fd0cd;padding:3px 9px;border-radius:6px}
.q-card .q{font-weight:600;font-size:1.04rem;margin:.2em 0}
.q-meta{display:flex;gap:18px;flex-wrap:wrap;margin-top:10px;font-size:.9rem;color:var(--muted)}
.q-meta b{color:#28384a;font-weight:600}
.answer{font-family:var(--mono);color:#0c7a45;font-weight:600}

/* ---- FAQ ---- */
details.faq{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:4px 18px;margin-bottom:12px}
details.faq summary{cursor:pointer;font-weight:600;padding:14px 0;list-style:none;font-size:1.03rem}
details.faq summary::-webkit-details-marker{display:none}
details.faq summary::before{content:"＋";color:var(--brand);font-weight:700;margin-right:10px}
details.faq[open] summary::before{content:"－"}
details.faq .a{padding:0 0 16px;color:#3a4956}

/* ---- 页脚 ---- */
.site-footer{background:var(--ink-dark);color:#9fb3c2;margin-top:40px;padding:38px 0 30px;font-size:.9rem}
.site-footer a{color:#7fd3d0}
.site-footer .cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:24px}
.site-footer h4{color:#cfe0ec;font-size:.95rem;margin:0 0 10px}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin:5px 0}
.disclaimer{margin-top:26px;padding-top:18px;border-top:1px solid #1c2c3a;color:#6f8499;font-size:.82rem;line-height:1.6}

/* ---- 杂项 ---- */
.tag-row{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0}
.prose p{margin:.7em 0}
.prose ul{padding-left:1.3em}
.prose li{margin:.35em 0}
hr.soft{border:none;border-top:1px solid var(--line);margin:34px 0}
.center{text-align:center}
@media(max-width:640px){
  .hero h1{font-size:1.8rem}
  .brand small{display:none}
  .nav{gap:2px;padding:10px 14px}
  .nav a.navlink{padding:5px 8px;font-size:.85rem}
}