:root {
  --ink: #e6ebee;
  --ink-soft: #a8b4bc;
  --paper: #12171a;
  --panel: #1a2126;
  --panel-2: #222b31;
  --line: #2e3a41;
  --accent: #38e07b;
  --accent-dim: #1f7a45;
  --warn: #e0663a;
  --radius: 10px;
  --maxw: 1180px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.78;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3, h4 { line-height: 1.3; margin: 0 0 .55em; font-weight: 700; letter-spacing: -.01em; }
h1 { font-size: clamp(1.6rem, 3.4vw, 2.5rem); }
h2 { font-size: clamp(1.25rem, 2.2vw, 1.6rem); margin-top: 1.9em; }
h3 { font-size: 1.1rem; margin-top: 1.5em; }
p { margin: 0 0 1.05em; }
ul, ol { padding-left: 1.35em; margin: 0 0 1.1em; }
li { margin-bottom: .4em; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 40;
  background: rgba(18, 23, 26, .94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex; align-items: center; gap: 18px;
  min-height: 64px; flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 700; }
.brand img { width: 38px; height: 38px; border-radius: 8px; border: 1px solid var(--line); }
.brand span { font-size: 1rem; letter-spacing: .02em; }
.brand small { display: block; font-size: .7rem; color: var(--ink-soft); font-weight: 400; letter-spacing: .12em; }

.nav { flex: 1; display: flex; gap: 4px; flex-wrap: wrap; }
.nav a {
  color: var(--ink-soft); padding: 7px 11px; border-radius: 7px;
  font-size: .9rem; text-decoration: none;
}
.nav a:hover { color: var(--ink); background: var(--panel); text-decoration: none; }
.nav a.is-active { color: var(--paper); background: var(--accent); font-weight: 700; }

.menu-toggle {
  display: none; margin-left: auto;
  background: var(--panel); color: var(--ink); border: 1px solid var(--line);
  border-radius: 8px; font-size: .92rem; padding: 9px 14px; cursor: pointer;
}

/* ---------- hero (asymmetric) ---------- */
.hero-band { border-bottom: 1px solid var(--line); background: linear-gradient(180deg, #151c20, #12171a); }
.hero-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 34px; align-items: center; padding: 44px 0 38px; }
.eyebrow {
  display: inline-block; font-size: .76rem; letter-spacing: .18em;
  color: var(--accent); border-left: 3px solid var(--accent); padding-left: 9px; margin-bottom: 14px;
}
.hero-lead { color: var(--ink-soft); font-size: 1.02rem; max-width: 34em; }
.hero-figure { position: relative; }
.hero-figure img { border-radius: 12px; border: 1px solid var(--line); }
.hero-figure figcaption { font-size: .78rem; color: var(--ink-soft); margin-top: 8px; }

.btn-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 8px; }
.btn {
  display: inline-block; padding: 11px 20px; border-radius: 8px;
  background: var(--accent); color: #07130c; font-weight: 700; font-size: .94rem; text-decoration: none;
}
.btn:hover { text-decoration: none; filter: brightness(1.06); }
.btn-ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); }
.btn-ghost:hover { background: var(--panel); }

/* ---------- index rail layout ---------- */
.rail-layout {
  display: grid; grid-template-columns: 236px 1fr; gap: 34px;
  padding: 40px 0 60px; align-items: start;
}
.rail { position: sticky; top: 82px; }
.rail-box {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--panel); padding: 16px 16px 8px; margin-bottom: 16px;
}
.rail-box h2 { font-size: .88rem; letter-spacing: .1em; color: var(--ink-soft); margin: 0 0 10px; }
.rail-box ol { margin: 0; padding-left: 1.15em; font-size: .88rem; }
.rail-box li { margin-bottom: .5em; }
.rail-box a { color: var(--ink-soft); }
.rail-box a:hover { color: var(--accent); }
.rail-note { font-size: .8rem; color: var(--ink-soft); line-height: 1.65; }

.seq { counter-reset: flow; }
.seq > section { padding-bottom: 6px; }
.kicker { font-size: .78rem; letter-spacing: .16em; color: var(--accent); text-transform: uppercase; }

/* ---------- data rows (signature) ---------- */
.rows { border-top: 1px solid var(--line); }
.row-item {
  display: grid; grid-template-columns: 64px 1fr 148px; gap: 18px;
  padding: 20px 0; border-bottom: 1px solid var(--line); align-items: center;
}
.row-idx { font-size: 1.5rem; font-weight: 700; color: var(--accent-dim); font-variant-numeric: tabular-nums; }
.row-item h3 { margin: 0 0 4px; font-size: 1.04rem; }
.row-item p { margin: 0; color: var(--ink-soft); font-size: .9rem; }
.row-tag {
  justify-self: end; text-align: center; font-size: .78rem; letter-spacing: .08em;
  border: 1px solid var(--accent-dim); color: var(--accent); border-radius: 999px; padding: 4px 12px;
}

/* ---------- cards ---------- */
.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; }
.card {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px; display: flex; flex-direction: column; gap: 10px;
}
.card img { border-radius: 8px; aspect-ratio: 4 / 3; object-fit: cover; }
.card h3 { margin: 0; font-size: 1rem; }
.card p { margin: 0; color: var(--ink-soft); font-size: .9rem; }
.card a.more { font-size: .86rem; }

/* ---------- split modules ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: center; }
.split-media img { border-radius: 12px; border: 1px solid var(--line); }
.split-body ul { font-size: .94rem; color: var(--ink-soft); }

/* ---------- article ---------- */
.crumbs { font-size: .82rem; color: var(--ink-soft); margin: 0 0 18px; }
.crumbs a { color: var(--ink-soft); }
.crumbs span { margin: 0 6px; color: var(--line); }

.article-layout {
  display: grid; grid-template-columns: minmax(0, 1fr) 296px; gap: 38px;
  padding: 34px 0 64px; align-items: start;
}
.article-head { border-bottom: 1px solid var(--line); padding-bottom: 18px; margin-bottom: 26px; }
.article-meta { display: flex; gap: 16px; flex-wrap: wrap; font-size: .84rem; color: var(--ink-soft); margin-top: 10px; }
.article-meta .author { color: var(--accent); }

.article-figure { margin: 26px 0; }
.article-figure img { border-radius: 10px; border: 1px solid var(--line); }
.article-figure figcaption { font-size: .78rem; color: var(--ink-soft); margin-top: 8px; }

.article-body { font-size: 1rem; }
.article-body h2 { border-left: 3px solid var(--accent-dim); padding-left: 12px; }
.article-body table { width: 100%; border-collapse: collapse; margin: 0 0 1.2em; font-size: .9rem; }
.article-body th, .article-body td { border: 1px solid var(--line); padding: 9px 11px; text-align: left; }
.article-body th { background: var(--panel-2); color: var(--ink); }
.article-body td { color: var(--ink-soft); }

.callout {
  background: var(--panel); border-left: 3px solid var(--accent); border-radius: 0 8px 8px 0;
  padding: 14px 18px; margin: 0 0 1.3em; font-size: .94rem; color: var(--ink-soft);
}
.faq-item { border-bottom: 1px solid var(--line); padding: 12px 0; }
.faq-item h3 { margin: 0 0 6px; font-size: .98rem; }
.faq-item p { margin: 0; color: var(--ink-soft); font-size: .92rem; }

.aside { position: sticky; top: 82px; display: flex; flex-direction: column; gap: 16px; }
.aside-box { border: 1px solid var(--line); background: var(--panel); border-radius: var(--radius); padding: 16px; }
.aside-box h2 { font-size: .86rem; letter-spacing: .1em; color: var(--ink-soft); margin: 0 0 10px; }
.aside-box ul { list-style: none; margin: 0; padding: 0; }
.aside-box li { border-bottom: 1px dashed var(--line); padding: 9px 0; margin: 0; font-size: .9rem; }
.aside-box li:last-child { border-bottom: 0; }
.aside-box li a { color: var(--ink); display: block; }
.aside-box li a:hover { color: var(--accent); }
.aside-box .tiny { font-size: .78rem; color: var(--ink-soft); margin: 0; }

.related-bar { border-top: 1px solid var(--line); padding-top: 22px; margin-top: 34px; }
.related-bar ul { columns: 2; column-gap: 28px; font-size: .92rem; list-style: none; padding: 0; }
.related-bar li { break-inside: avoid; margin-bottom: .6em; }

/* ---------- list pages ---------- */
.list-page { padding: 36px 0 64px; }
.list-head { border-bottom: 1px solid var(--line); padding-bottom: 20px; margin-bottom: 8px; }
.list-head p { color: var(--ink-soft); max-width: 46em; }
.item-list { display: flex; flex-direction: column; }
.item-list article {
  display: grid; grid-template-columns: 1fr 190px; gap: 22px; align-items: center;
  padding: 22px 0; border-bottom: 1px solid var(--line);
}
.item-list article h2 { font-size: 1.08rem; margin: 0 0 6px; }
.item-list article p { margin: 0; color: var(--ink-soft); font-size: .92rem; }
.item-list article img { border-radius: 8px; aspect-ratio: 4/3; object-fit: cover; }

/* ---------- footer ---------- */
.site-footer { border-top: 1px solid var(--line); background: #0e1315; padding: 34px 0 26px; margin-top: 20px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 28px; font-size: .88rem; }
.footer-grid h2 { font-size: .86rem; letter-spacing: .1em; color: var(--ink-soft); margin: 0 0 10px; }
.footer-grid p, .footer-grid li { color: var(--ink-soft); }
.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.footer-grid a { color: var(--ink-soft); }
.footer-legal { border-top: 1px solid var(--line); margin-top: 24px; padding-top: 16px; font-size: .8rem; color: var(--ink-soft); }
.footer-legal p { margin: 0 0 .35em; }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: 24px; padding: 32px 0 28px; }
  .rail-layout { grid-template-columns: 1fr; gap: 22px; }
  .rail { position: static; order: 2; }
  .article-layout { grid-template-columns: 1fr; gap: 26px; }
  .aside { position: static; }
  .split { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 18px; }
  .row-item { grid-template-columns: 44px 1fr; }
  .row-tag { grid-column: 2; justify-self: start; }
  .item-list article { grid-template-columns: 1fr; }
  .item-list article img { order: -1; }
  .related-bar ul { columns: 1; }
  .nav { display: none; width: 100%; flex-direction: column; padding-bottom: 10px; }
  .nav.is-open { display: flex; }
  .nav a { padding: 11px 10px; }
  .menu-toggle { display: block; }
}