/* 深圳七牛生命科学有限公司 · 公司介绍 / 修订记录站  — 零依赖样式 */
:root {
  --bg: #f5f7fb;
  --surface: #ffffff;
  --surface-2: #eef2f8;
  --ink: #16223a;
  --ink-soft: #4a5775;
  --ink-faint: #7b88a3;
  --line: #e1e7f0;
  --brand: #1f4e8c;       /* 深蓝 */
  --brand-2: #0ea5b7;     /* 青 */
  --accent: #10b981;      /* 生命科学绿 */
  --brand-grad: linear-gradient(135deg, #1f4e8c 0%, #0ea5b7 100%);
  --shadow: 0 1px 2px rgba(20,34,58,.06), 0 8px 24px rgba(20,34,58,.06);
  --shadow-lg: 0 12px 40px rgba(20,34,58,.14);
  --radius: 14px;
  --maxw: 880px;
  --bar-h: 60px;
}
[data-theme="dark"] {
  --bg: #0c1322;
  --surface: #121c30;
  --surface-2: #18243c;
  --ink: #e9eefa;
  --ink-soft: #aebad3;
  --ink-faint: #7e8cab;
  --line: #243349;
  --brand: #5b9bff;
  --brand-2: #36c7d8;
  --accent: #34d399;
  --brand-grad: linear-gradient(135deg, #2b5fa6 0%, #0ea5b7 100%);
  --shadow: 0 1px 2px rgba(0,0,0,.3), 0 10px 30px rgba(0,0,0,.35);
  --shadow-lg: 0 16px 48px rgba(0,0,0,.5);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--bar-h) + 14px); -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
img, svg { max-width: 100%; }

/* ---------- 顶栏 ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  height: var(--bar-h);
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter: saturate(160%) blur(10px);
  -webkit-backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.bar-inner {
  max-width: 1120px; height: 100%; margin: 0 auto; padding: 0 18px;
  display: flex; align-items: center; gap: 14px;
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); flex: 0 0 auto; }
.brand:hover { text-decoration: none; }
.brand .logo { width: 32px; height: 32px; border-radius: 9px; flex: 0 0 auto; box-shadow: var(--shadow); }
.brand .bname { display: flex; flex-direction: column; line-height: 1.15; }
.brand .bname strong { font-size: 15px; letter-spacing: .3px; }
.brand .bname small { font-size: 11px; color: var(--ink-faint); font-weight: 500; }

.nav { display: flex; gap: 4px; margin-left: 8px; flex: 1 1 auto; overflow: hidden; }
.nav a {
  color: var(--ink-soft); padding: 7px 11px; border-radius: 8px; font-size: 14px;
  white-space: nowrap; transition: background .15s, color .15s;
}
.nav a:hover { background: var(--surface-2); color: var(--ink); text-decoration: none; }
.nav a.active { color: var(--brand); background: color-mix(in srgb, var(--brand) 12%, transparent); font-weight: 600; }

.bar-actions { display: flex; align-items: center; gap: 8px; flex: 0 0 auto; }
.ver-badge {
  font-size: 12px; font-weight: 700; color: #fff; background: var(--brand-grad);
  padding: 4px 9px; border-radius: 999px; letter-spacing: .3px;
}
.icon-btn {
  width: 36px; height: 36px; display: inline-flex; align-items: center; justify-content: center;
  background: var(--surface-2); border: 1px solid var(--line); border-radius: 9px; color: var(--ink-soft);
  cursor: pointer; padding: 0;
}
.icon-btn:hover { color: var(--ink); border-color: var(--brand-2); }
.icon-btn svg { width: 18px; height: 18px; }
.menu-btn { display: none; }
[data-theme="dark"] .sun { display: none; }
[data-theme="dark"] .moon { display: block; }
.moon { display: none; }
.sun { display: block; }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background: var(--brand-grad); color: #fff;
}
.hero::after {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(620px 320px at 88% -8%, rgba(255,255,255,.20), transparent 60%),
    radial-gradient(520px 300px at 6% 116%, rgba(16,185,129,.30), transparent 60%);
  pointer-events: none;
}
.hero-inner { position: relative; max-width: 1120px; margin: 0 auto; padding: 56px 22px 60px; }
.hero .eyebrow { font-size: 13px; letter-spacing: 2px; text-transform: uppercase; opacity: .92; margin: 0 0 12px; }
.hero h1 { font-size: clamp(28px, 5vw, 44px); line-height: 1.18; margin: 0 0 14px; font-weight: 800; letter-spacing: .5px; }
.hero .tagline { font-size: clamp(15px, 2.4vw, 19px); max-width: 720px; opacity: .96; margin: 0 0 22px; }
.hero-chips { display: flex; flex-wrap: wrap; gap: 9px; margin: 0 0 26px; padding: 0; list-style: none; }
.hero-chips li {
  font-size: 13px; padding: 6px 13px; border-radius: 999px;
  background: rgba(255,255,255,.16); border: 1px solid rgba(255,255,255,.28); backdrop-filter: blur(4px);
}
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.btn {
  display: inline-flex; align-items: center; gap: 7px; font-size: 14.5px; font-weight: 600;
  padding: 11px 20px; border-radius: 10px; cursor: pointer; border: 1px solid transparent; transition: transform .12s, box-shadow .15s, background .15s;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: #fff; color: var(--brand); box-shadow: var(--shadow); }
.btn-ghost { background: rgba(255,255,255,.10); color: #fff; border-color: rgba(255,255,255,.5); }
.btn-ghost:hover { background: rgba(255,255,255,.2); }
.btn svg { width: 17px; height: 17px; }
.hero-meta { margin-top: 22px; font-size: 12.5px; opacity: .85; }

/* ---------- 主体布局 ---------- */
main { display: block; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 22px; }
.doc { padding: 40px 0 8px; }

.doc-sec { margin: 0 0 38px; scroll-margin-top: calc(var(--bar-h) + 14px); }
.doc-sec > h2 {
  font-size: 22px; font-weight: 800; color: var(--ink); margin: 0 0 16px;
  display: flex; align-items: baseline; gap: 12px; padding-bottom: 10px; border-bottom: 2px solid var(--line);
}
.sec-no {
  font-size: 13px; font-weight: 800; color: #fff; background: var(--brand-grad);
  border-radius: 7px; padding: 3px 8px; letter-spacing: 1px; flex: 0 0 auto; align-self: center;
}
.doc-sec h3 { font-size: 16.5px; margin: 18px 0 8px; color: var(--ink); }
.doc-sec p { margin: 0 0 13px; color: var(--ink-soft); }
.doc-sec p strong, .doc-sec li strong { color: var(--ink); }
.doc-sec .lead { font-size: 18px; color: var(--ink); line-height: 1.7; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; padding: 0; margin: 18px 0 0; }
.chips li {
  font-size: 13px; color: var(--brand); background: color-mix(in srgb, var(--brand) 9%, var(--surface));
  border: 1px solid color-mix(in srgb, var(--brand) 22%, transparent); padding: 5px 12px; border-radius: 999px; font-weight: 600;
}

/* 招聘宣传文案卡（约 500 字成稿，可一键复制） */
.promo-card {
  margin: 0 0 30px; padding: 20px 22px; border-radius: var(--radius);
  background: color-mix(in srgb, var(--brand) 6%, var(--surface));
  border: 1px solid color-mix(in srgb, var(--brand) 25%, transparent);
  border-left: 4px solid var(--brand); box-shadow: var(--shadow);
}
.promo-head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 12px; }
.promo-tag {
  font-size: 12px; font-weight: 700; letter-spacing: .4px; color: var(--brand);
  background: color-mix(in srgb, var(--brand) 12%, transparent); padding: 4px 11px; border-radius: 999px;
}
.promo-copy {
  font-size: 13px; font-weight: 600; color: var(--brand); background: var(--surface);
  border: 1px solid var(--line); border-radius: 8px; padding: 5px 13px; cursor: pointer; white-space: nowrap;
}
.promo-copy:hover { border-color: var(--brand-2); }
.promo-body p { margin: 0 0 11px; color: var(--ink); line-height: 1.85; }
.promo-body p:last-child { margin-bottom: 0; }

/* 七牛云背景卡 */
.qiniu-card {
  margin: 22px 0; padding: 22px 22px 16px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--line);
  border-left: 4px solid var(--brand-2); box-shadow: var(--shadow);
}
.qiniu-card__head { display: flex; align-items: center; gap: 10px; margin-bottom: 6px; }
.qiniu-card__head h3 { margin: 0; font-size: 18px; }
.qiniu-card__tag {
  font-size: 11px; font-weight: 700; letter-spacing: .5px; color: var(--brand-2);
  border: 1px solid color-mix(in srgb, var(--brand-2) 45%, transparent); padding: 2px 8px; border-radius: 6px;
}
.qiniu-facts { margin: 12px 0 6px; display: grid; gap: 0; }
.qiniu-facts > div {
  display: grid; grid-template-columns: 92px 1fr; gap: 14px; padding: 9px 0; border-top: 1px dashed var(--line);
}
.qiniu-facts dt { color: var(--ink-faint); font-size: 13.5px; font-weight: 700; }
.qiniu-facts dd { margin: 0; color: var(--ink-soft); font-size: 14.5px; }
.qiniu-card__src { font-size: 12.5px; color: var(--ink-faint); margin: 8px 0 0; }

/* 关系说明 note */
.rel-note {
  margin: 18px 0; padding: 14px 16px; border-radius: 12px; font-size: 14px; line-height: 1.7;
  background: color-mix(in srgb, var(--accent) 9%, var(--surface));
  border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
  color: var(--ink-soft);
}
.rel-note strong { color: var(--accent); }
[data-theme="dark"] .rel-note strong { color: #4ade80; }

/* 业务网格 */
.biz-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 6px; }
.biz-item {
  background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 16px 18px; box-shadow: var(--shadow);
}
.biz-item h3 { margin: 0 0 7px; font-size: 16px; color: var(--brand); }
.biz-item p { margin: 0; font-size: 14.5px; }

.join-list { margin: 6px 0 0; padding-left: 0; list-style: none; }
.join-list li { position: relative; padding: 8px 0 8px 26px; color: var(--ink-soft); border-bottom: 1px solid var(--line); }
.join-list li:last-child { border-bottom: none; }
.join-list li::before {
  content: ""; position: absolute; left: 2px; top: 15px; width: 9px; height: 9px; border-radius: 3px;
  background: var(--brand-grad);
}

.contact { margin-top: 18px; background: var(--surface-2); border: 1px solid var(--line); border-radius: 12px; padding: 18px 20px; }
.contact h3 { margin: 0 0 10px; }
.contact-list { list-style: none; margin: 0; padding: 0; }
.contact-list li { display: flex; gap: 14px; padding: 7px 0; border-bottom: 1px dashed var(--line); font-size: 14.5px; }
.contact-list li:last-child { border-bottom: none; }
.contact-list span { flex: 0 0 72px; color: var(--ink-faint); }
.contact-list b { color: var(--ink); font-weight: 600; }
.contact-list em { color: var(--ink-faint); font-style: normal; font-weight: 400; }
.contact-note { font-size: 12.5px; color: var(--ink-faint); margin: 12px 0 0; }

.doc-refs .refs-intro { font-size: 14px; }
.refs { margin: 6px 0 0; padding-left: 20px; }
.refs li { margin: 5px 0; font-size: 14px; color: var(--ink-soft); }

/* ---------- 修订记录 ---------- */
.revlog-wrap { background: var(--surface-2); border-top: 1px solid var(--line); margin-top: 14px; }
.revlog-inner { max-width: var(--maxw); margin: 0 auto; padding: 40px 22px 52px; }
.revlog-wrap h2 {
  font-size: 22px; font-weight: 800; margin: 0 0 6px; display: flex; align-items: center; gap: 10px;
}
.revlog-wrap .sub { color: var(--ink-faint); font-size: 14px; margin: 0 0 22px; }
.timeline { list-style: none; margin: 0; padding: 0; position: relative; }
.timeline::before { content: ""; position: absolute; left: 7px; top: 6px; bottom: 6px; width: 2px; background: var(--line); }
.tl-item { position: relative; padding: 0 0 22px 34px; }
.tl-item::before {
  content: ""; position: absolute; left: 0; top: 4px; width: 16px; height: 16px; border-radius: 50%;
  background: var(--surface); border: 3px solid var(--brand-2); box-shadow: 0 0 0 3px var(--surface-2);
}
.tl-item.is-current::before { background: var(--brand-grad); border-color: transparent; }
.tl-head { display: flex; flex-wrap: wrap; align-items: center; gap: 9px; margin-bottom: 6px; }
.tl-ver { font-weight: 800; font-size: 16px; color: var(--ink); }
.tl-date { font-size: 13px; color: var(--ink-faint); }
.tl-status { font-size: 11.5px; font-weight: 700; padding: 2px 8px; border-radius: 999px; }
.tl-status.cur { color: #fff; background: var(--brand-grad); }
.tl-status.old { color: var(--ink-soft); background: var(--surface); border: 1px solid var(--line); }
.tl-editor { font-size: 12.5px; color: var(--ink-faint); }
.tl-summary { margin: 0 0 8px; color: var(--ink-soft); font-size: 14.5px; }
.tl-changes { margin: 0 0 12px; padding-left: 18px; }
.tl-changes li { font-size: 13.5px; color: var(--ink-soft); margin: 3px 0; }
.tl-view {
  font-size: 13px; font-weight: 600; color: var(--brand); background: var(--surface);
  border: 1px solid var(--line); border-radius: 8px; padding: 5px 12px; cursor: pointer;
}
.tl-view:hover { border-color: var(--brand-2); }
.tl-view[disabled] { opacity: .5; cursor: default; }

/* 历史版本查看横幅 */
.vbanner {
  position: sticky; top: var(--bar-h); z-index: 30;
  background: #92400e; color: #fff; font-size: 13.5px;
  display: flex; align-items: center; justify-content: center; gap: 14px; padding: 9px 16px;
}
[data-theme="dark"] .vbanner { background: #b45309; }
.vbanner button {
  font-size: 13px; font-weight: 600; color: #92400e; background: #fff; border: none; border-radius: 7px;
  padding: 4px 12px; cursor: pointer;
}
.vbanner[hidden] { display: none; }

/* ---------- 页脚 ---------- */
footer { border-top: 1px solid var(--line); background: var(--surface); color: var(--ink-faint); }
.foot-inner { max-width: var(--maxw); margin: 0 auto; padding: 26px 22px 40px; font-size: 13px; }
.foot-inner .fname { color: var(--ink); font-weight: 700; font-size: 14px; }
.foot-inner p { margin: 7px 0 0; }
.foot-disc { margin-top: 12px; padding-top: 12px; border-top: 1px dashed var(--line); line-height: 1.7; }

/* ---------- 移动端 ---------- */
@media (max-width: 760px) {
  .menu-btn { display: inline-flex; }
  .nav {
    position: fixed; top: var(--bar-h); right: 0; left: 0; flex-direction: column; gap: 2px;
    background: var(--surface); border-bottom: 1px solid var(--line); padding: 10px 14px 16px;
    transform: translateY(-130%); transition: transform .22s ease; box-shadow: var(--shadow-lg); overflow: visible;
  }
  .nav.open { transform: translateY(0); }
  .nav a { padding: 11px 12px; font-size: 15px; }
  .brand .bname small { display: none; }
  .biz-grid { grid-template-columns: 1fr; }
  .qiniu-facts > div { grid-template-columns: 1fr; gap: 2px; }
  .qiniu-facts dt { font-size: 13px; }
}
@media (max-width: 420px) {
  .hero-inner { padding: 40px 18px 44px; }
  .wrap, .revlog-inner, .foot-inner { padding-left: 16px; padding-right: 16px; }
  .hero-cta .btn { flex: 1 1 auto; justify-content: center; }
  /* 顶栏收紧，保证 320px 窄屏不横向溢出 */
  .bar-inner { padding: 0 12px; gap: 8px; }
  .bar-actions { gap: 6px; }
  .brand { gap: 8px; min-width: 0; }
  .brand .logo { width: 28px; height: 28px; }
  .brand .bname strong { font-size: 14px; }
}

/* ---------- 打印 ---------- */
@media print {
  .topbar, .hero-cta, .nav, .bar-actions, .revlog-wrap, .vbanner, .menu-btn { display: none !important; }
  body { background: #fff; color: #000; }
  .hero { background: #fff; color: #000; }
  .hero::after { display: none; }
  .qiniu-card, .biz-item, .contact { box-shadow: none; }
  a { color: #000; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}