/* 存储价格知识图谱 · 浅色·数据报告风 */
:root{
  --paper:#FBF9F4; --paper2:#F4F1E8; --card:#FFFFFF;
  --ink:#1B1B2A; --ink-soft:#5A5648; --ink-faint:#8A8574;
  --contract:#1B2A4A; --spot:#C0392B; --green:#2E7D5B;
  --accent:#2E5A8F; --amber:#C98A2B; --grid:#E4DFD4; --line:#D8D2C4;
  --sidebar-w:248px; --maxw:900px;
  --shadow:0 1px 2px rgba(27,27,42,.05),0 8px 30px rgba(27,27,42,.06);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:'Noto Sans SC',system-ui,sans-serif;
  font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;
}
.bg-grid{position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.5;
  background-image:linear-gradient(var(--grid) 1px,transparent 1px),
    linear-gradient(90deg,var(--grid) 1px,transparent 1px);
  background-size:38px 38px;mask-image:radial-gradient(circle at 30% 0%,#000,transparent 80%);}

/* ---------- Sidebar ---------- */
aside.sidebar{position:fixed;top:0;left:0;width:var(--sidebar-w);height:100vh;
  background:var(--paper2);border-right:1px solid var(--line);
  padding:26px 18px;overflow-y:auto;z-index:20}
.sb-brand{font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:15px;
  letter-spacing:.02em;color:var(--contract);line-height:1.35}
.sb-brand small{display:block;font-family:'Space Mono',monospace;font-size:10.5px;
  color:var(--ink-faint);font-weight:400;margin-top:4px;letter-spacing:.04em}
.sb-nav{margin-top:22px;list-style:none;padding:0}
.sb-nav li{margin:1px 0}
.sb-nav a{display:flex;gap:9px;align-items:baseline;text-decoration:none;color:var(--ink-soft);
  font-size:13.5px;padding:7px 10px;border-radius:7px;transition:.15s}
.sb-nav a .num{font-family:'Space Mono',monospace;font-size:11px;color:var(--ink-faint);min-width:20px}
.sb-nav a:hover{background:#EAE5D8;color:var(--ink)}
.sb-nav a.active{background:var(--contract);color:#fff}
.sb-nav a.active .num{color:#B9C6DD}
.sb-foot{margin-top:24px;padding-top:16px;border-top:1px solid var(--line);
  font-size:11px;color:var(--ink-faint);font-family:'Space Mono',monospace;line-height:1.6}

/* ---------- Layout ---------- */
.content{position:relative;z-index:1;margin-left:var(--sidebar-w);
  padding:56px clamp(20px,5vw,72px);max-width:calc(var(--maxw) + 144px)}
section{margin-bottom:46px;opacity:0;transform:translateY(14px);
  transition:opacity .6s ease,transform .6s ease}
section.in{opacity:1;transform:none}

/* ---------- Typography ---------- */
h1{font-family:'Noto Serif SC',serif;font-weight:900;font-size:clamp(28px,4vw,42px);
  line-height:1.2;margin:.2em 0 .3em;letter-spacing:-.01em}
h2{font-family:'Noto Serif SC',serif;font-weight:700;font-size:24px;margin:0 0 .5em;
  padding-bottom:.35em;border-bottom:2px solid var(--ink);display:inline-block}
h3{font-family:'Space Grotesk','Noto Sans SC',sans-serif;font-weight:600;font-size:17px;margin:1.4em 0 .5em}
.eyebrow{font-family:'Space Mono',monospace;font-size:12px;letter-spacing:.18em;
  text-transform:uppercase;color:var(--accent);font-weight:700}
.lede{font-size:18px;color:var(--ink-soft);max-width:60ch}
p{margin:.7em 0}
a.inl{color:var(--accent);text-decoration:underline;text-underline-offset:2px}
mono,.mono{font-family:'Space Mono',monospace}
strong{color:var(--ink)}

/* ---------- Hero ---------- */
.hero{padding:20px 0 8px}
.hero .kicker{font-family:'Space Mono',monospace;color:var(--ink-faint);font-size:13px;letter-spacing:.06em}
.stat-band{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));
  gap:14px;margin:26px 0}
.stat{background:var(--card);border:1px solid var(--line);border-radius:12px;
  padding:18px 18px 16px;box-shadow:var(--shadow)}
.stat .v{font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:30px;
  color:var(--spot);line-height:1.05}
.stat .v.blue{color:var(--contract)}
.stat .v.green{color:var(--green)}
.stat .k{font-size:12.5px;color:var(--ink-soft);margin-top:6px}

/* ---------- Cards / grids ---------- */
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px;margin:22px 0}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px;
  box-shadow:var(--shadow);text-decoration:none;color:inherit;display:block;transition:.18s}
a.card:hover{transform:translateY(-3px);border-color:var(--accent);box-shadow:0 10px 34px rgba(27,42,74,.13)}
.card .num{font-family:'Space Mono',monospace;font-size:12px;color:var(--accent);font-weight:700}
.card h3{margin:.4em 0 .3em}
.card p{font-size:13.5px;color:var(--ink-soft);margin:0}

.figure{background:var(--card);border:1px solid var(--line);border-radius:12px;
  padding:14px;box-shadow:var(--shadow);margin:22px 0}
.figure img{width:100%;height:auto;display:block;border-radius:6px}
.figure figcaption{font-size:12.5px;color:var(--ink-soft);margin-top:10px;padding-left:2px}

.callout{border-left:4px solid var(--accent);background:var(--paper2);
  border-radius:0 10px 10px 0;padding:14px 18px;margin:20px 0}
.callout.warn{border-color:var(--spot)}
.callout.good{border-color:var(--green)}
.callout .lab{font-family:'Space Mono',monospace;font-size:11px;letter-spacing:.1em;
  text-transform:uppercase;color:var(--accent);font-weight:700}
.callout.warn .lab{color:var(--spot)} .callout.good .lab{color:var(--green)}

/* ---------- Table ---------- */
.tbl{width:100%;border-collapse:collapse;margin:18px 0;font-size:14px;background:var(--card);
  border:1px solid var(--line);border-radius:10px;overflow:hidden}
.tbl th,.tbl td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--grid)}
.tbl th{background:var(--contract);color:#fff;font-weight:600;font-size:13px}
.tbl tr:last-child td{border-bottom:none}
.tbl td.num{font-family:'Space Mono',monospace;text-align:right}
.tbl .hot{color:var(--spot);font-weight:700}
.tbl .low{color:var(--green);font-weight:700}

/* ---------- Timeline ---------- */
.tl{list-style:none;padding:0;margin:22px 0;border-left:2px solid var(--line)}
.tl li{position:relative;padding:0 0 22px 26px}
.tl li::before{content:"";position:absolute;left:-7px;top:5px;width:12px;height:12px;
  border-radius:50%;background:var(--accent);border:2px solid var(--paper)}
.tl li.crash::before{background:var(--spot)} .tl li.boom::before{background:var(--amber)}
.tl .yr{font-family:'Space Mono',monospace;font-weight:700;color:var(--contract);font-size:14px}
.tl .t{font-weight:600}

/* ---------- badges / tip ---------- */
.badge{display:inline-block;font-family:'Space Mono',monospace;font-size:10.5px;
  padding:2px 7px;border-radius:5px;font-weight:700;letter-spacing:.03em}
.badge.v{background:#E2EFDA;color:#2E7D5B} .badge.e{background:#F3E7D2;color:#9A6B12}
[data-tip]{border-bottom:1px dashed var(--accent);cursor:help}
#tip{position:fixed;z-index:60;max-width:290px;background:var(--ink);color:#F4F1E8;
  font-size:12.5px;line-height:1.55;padding:9px 12px;border-radius:8px;pointer-events:none;
  opacity:0;transition:opacity .12s;box-shadow:0 8px 24px rgba(0,0,0,.25)}

/* ---------- chapter nav ---------- */
.chap-nav{display:flex;justify-content:space-between;gap:12px;margin-top:40px;
  padding-top:22px;border-top:1px solid var(--line)}
.chap-nav a{text-decoration:none;color:var(--accent);font-size:14px;font-weight:600;
  font-family:'Space Grotesk',sans-serif}
.chap-nav a:hover{color:var(--contract)}

/* ---------- glossary ---------- */
.gsearch{width:100%;max-width:420px;padding:11px 14px;border:1px solid var(--line);
  border-radius:9px;font-size:15px;font-family:inherit;background:var(--card);margin:8px 0 20px}
.gsearch:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(46,90,143,.15)}
.gterm{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:14px 16px;margin:10px 0}
.gterm .term{font-weight:700;font-family:'Space Grotesk','Noto Sans SC',sans-serif;color:var(--contract)}
.gterm .grp{float:right;font-family:'Space Mono',monospace;font-size:10.5px;color:var(--ink-faint)}
.gterm .def{font-size:14px;color:var(--ink-soft);margin-top:5px}
.ghide{display:none}

.src-list{font-size:13px;color:var(--ink-soft);line-height:1.9}
.src-list li{margin:2px 0}

/* ---------- responsive ---------- */
@media(max-width:900px){
  aside.sidebar{position:static;width:100%;height:auto;border-right:none;border-bottom:1px solid var(--line)}
  .content{margin-left:0;padding:32px 18px}
  .sb-nav{display:flex;flex-wrap:wrap;gap:4px} .sb-nav li{margin:0}
  .sb-foot{display:none}
}
@media print{
  aside.sidebar,.bg-grid,.chap-nav{display:none}
  .content{margin:0} section{opacity:1;transform:none}
}