/* 布局概念：顾问的“诊断档案”——左对齐的非对称网格，等宽小字做档案标签。
   色彩：墨色与冷灰为主，深海军蓝做交互色，香槟铜只用在少数强调处（首屏一句、细线、精选标记）。 */
:root {
  --paper: #f4f5f7;
  --surface: #ffffff;
  --ink: #131926;
  --ink-2: #4b5263;
  --ink-3: #868c9a;
  --line: #dfe1e6;
  --cobalt: #243b5e;          /* 交互色：深海军蓝 */
  --on-cobalt: #ffffff;
  --gold: #b8935a;            /* 装饰细线：香槟铜 */
  --accent-ink: #8a6a3b;      /* 铜色文字（保证在浅底上可读） */
  --seal-bg: #131926;
  --seal-fg: #dcc596;
  --band: #131926;
  --band-ink: #eceef2;
  --band-mute: #a3a9b6;
  --band-line: rgba(236, 238, 242, 0.14);
  --danger: #a8402c;
  --shadow: 0 1px 2px rgba(19, 25, 38, 0.05), 0 14px 34px -14px rgba(19, 25, 38, 0.2);

  --f-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --f-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", system-ui, sans-serif;
  --f-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, "Microsoft YaHei", monospace;

  --step-0: 1rem;
  --step-1: 1.25rem;
  --step-2: 1.6rem;
  --step-3: clamp(1.9rem, 1.3rem + 2.4vw, 2.9rem);
  --step-4: clamp(2.3rem, 1.1rem + 4vw, 4.6rem);
  --radius: 3px;
  --gutter: 16px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #0e1117;
    --surface: #161a22;
    --ink: #e9ebef;
    --ink-2: #a9aebb;
    --ink-3: #747a88;
    --line: #272c36;
    --cobalt: #93a8c6;
    --on-cobalt: #0e1117;
    --gold: #c4a46c;
    --accent-ink: #d3b680;
    --seal-bg: #232935;
    --seal-fg: #dcc596;
    --band: #08090d;
    --band-ink: #e9ebef;
    --band-mute: #9aa0ad;
    --band-line: rgba(233, 235, 239, 0.12);
    --danger: #e58a72;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 16px 40px -16px rgba(0, 0, 0, 0.7);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #0e1117;
  --surface: #161a22;
  --ink: #e9ebef;
  --ink-2: #a9aebb;
  --ink-3: #747a88;
  --line: #272c36;
  --cobalt: #93a8c6;
  --on-cobalt: #0e1117;
  --gold: #c4a46c;
  --accent-ink: #d3b680;
  --seal-bg: #232935;
  --seal-fg: #dcc596;
  --band: #08090d;
  --band-ink: #e9ebef;
  --band-mute: #9aa0ad;
  --band-line: rgba(233, 235, 239, 0.12);
  --danger: #e58a72;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 16px 40px -16px rgba(0, 0, 0, 0.7);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 var(--step-0)/1.75 var(--f-body);
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
h1, h2, h3 { font-family: var(--f-display); font-weight: 900; line-height: 1.2; margin: 0; text-wrap: balance; letter-spacing: 0.01em; }
p { margin: 0; }
:focus-visible { outline: 2px solid var(--cobalt); outline-offset: 3px; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

.wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding-left: max(var(--gutter), env(safe-area-inset-left, 0px));
  padding-right: max(var(--gutter), env(safe-area-inset-right, 0px));
}
@media (min-width: 720px) { :root { --gutter: 32px; } }

.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 16px; z-index: 100; background: var(--surface); padding: 8px 12px; }

.mono-label {
  font: 500 0.75rem/1.4 var(--f-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.todo {
  background: color-mix(in srgb, var(--gold) 26%, transparent);
  border-bottom: 1px dashed currentColor;
  padding: 0 2px;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 44px; padding: 0 20px;
  border: 1px solid transparent; border-radius: var(--radius);
  font: 500 0.95rem/1 var(--f-body); text-decoration: none; cursor: pointer;
  transition: transform 0.15s ease, background-color 0.15s ease, border-color 0.15s ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--ink); color: var(--paper); }
.btn-primary:hover { background: var(--cobalt); color: var(--on-cobalt); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--ink); }
.btn-small { min-height: 36px; padding: 0 14px; font-size: 0.85rem; }

/* ---------- 顶栏 ---------- */
body::before {
  content: ""; position: fixed; inset: 0 0 auto; height: env(safe-area-inset-top, 0px);
  z-index: 30; background: var(--paper);
}
.topbar {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.topbar-in { display: flex; align-items: center; gap: 24px; min-height: 64px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; min-width: 0; }
.brand-mark {
  display: grid; place-items: center; width: 40px; height: 40px; flex: none;
  border: 1.5px solid var(--ink); color: var(--ink);
  font: 600 0.82rem/1 var(--f-display); letter-spacing: 0.02em;
}
.brand-name { display: flex; flex-direction: column; line-height: 1.2; min-width: 0; }
.brand-name b { font: 900 1.05rem/1.2 var(--f-display); }
.brand-name small { font-size: 0.75rem; color: var(--ink-3); }
.nav { display: flex; gap: 4px; margin-left: auto; overflow-x: auto; scrollbar-width: none; }
.nav::-webkit-scrollbar { display: none; }
.nav a {
  padding: 8px 12px; text-decoration: none; font-size: 0.92rem; color: var(--ink-2);
  white-space: nowrap; border-radius: var(--radius);
}
.nav a:hover { color: var(--ink); background: color-mix(in srgb, var(--ink) 6%, transparent); }
.theme-toggle {
  flex: none; display: grid; place-items: center; width: 40px; height: 40px;
  border: 1px solid var(--line); border-radius: 50%; background: transparent; color: var(--ink-2); cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease;
}
.theme-toggle:hover { border-color: var(--ink); color: var(--ink); }
.theme-toggle svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.theme-toggle .i-sun { display: none; }
.theme-toggle.is-dark .i-sun { display: block; }
.theme-toggle.is-dark .i-moon { display: none; }
@media (max-width: 760px) {
  .topbar-in { flex-wrap: wrap; gap: 0 12px; padding-block: 10px 0; }
  .nav { order: 3; width: 100%; margin: 6px 0 0 -12px; padding-bottom: 6px; }
  .theme-toggle { margin-left: auto; }
  .brand-name small { display: none; }
}

/* ---------- 主张 ---------- */
.hero { padding-block: clamp(48px, 8vw, 104px) clamp(48px, 7vw, 88px); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr); gap: clamp(32px, 5vw, 72px); align-items: start; }
@media (max-width: 1180px) { .hero-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); } }
@media (max-width: 900px) { .hero-grid { grid-template-columns: minmax(0, 1fr); } .matrix { max-width: 560px; } }
.eyebrow { font: 500 0.8rem/1.4 var(--f-mono); letter-spacing: 0.08em; color: var(--ink-3); margin-bottom: 20px; }
.hero-title { font-size: var(--step-4); line-height: 1.12; letter-spacing: 0.02em; }
.hero-title .line { display: inline-block; white-space: nowrap; }
.seal {
  display: inline-block; margin-top: 0.08em; padding: 0;
  background: none; color: var(--accent-ink);
}
.lede { margin-top: 28px; max-width: 34em; font-size: 1.1rem; color: var(--ink-2); line-height: 1.85; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.hero-facts { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin: 48px 0 0; padding-top: 24px; border-top: 1px solid var(--line); max-width: 34em; }
.hero-facts div { min-width: 0; }
.hero-facts dt { font: 500 0.72rem/1.4 var(--f-mono); letter-spacing: 0.08em; color: var(--ink-3); text-transform: uppercase; }
.hero-facts dd { margin: 6px 0 0; font: 600 1.05rem/1.4 var(--f-display); }

/* 决策矩阵 */
.matrix {
  margin: 0; background: var(--surface); border: 1px solid var(--line);
  box-shadow: var(--shadow); padding: 20px 20px 18px; min-width: 0;
}
.matrix figcaption { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 4px 12px; margin-bottom: 14px; }
.matrix-hint { font-size: 0.8rem; color: var(--ink-3); }
.matrix-scroll { overflow-x: auto; margin-inline: -4px; }
.matrix-table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; min-width: 330px; }
.matrix-table th, .matrix-table td { padding: 7px 4px; text-align: center; border-bottom: 1px solid var(--line); }
.matrix-table thead th { font: 600 0.82rem/1.35 var(--f-body); color: var(--ink); vertical-align: bottom; padding-bottom: 10px; }
.matrix-table thead th.crit-h { text-align: left; font: 500 0.7rem/1.4 var(--f-mono); color: var(--ink-3); letter-spacing: 0.06em; }
.matrix-table th.opt.lead { color: var(--cobalt); }
.matrix-table th.opt .flag {
  display: inline-block; margin-top: 4px; padding: 1px 6px;
  background: var(--seal-bg); color: var(--seal-fg); font: 500 0.66rem/1.5 var(--f-mono);
  visibility: hidden;
}
.matrix-table th.opt.lead .flag { visibility: visible; }
.matrix-table tbody th { text-align: left; font-weight: 400; font-size: 0.84rem; line-height: 1.35; color: var(--ink-2); }
.crit-key { font: 500 0.75rem/1 var(--f-mono); color: var(--ink-3); margin-right: 6px; }
.crit-w { display: block; margin: 3px 0 0 1.35em; font: 500 0.7rem/1 var(--f-mono); color: var(--ink-3); white-space: nowrap; }
.score {
  width: 32px; height: 30px; border-radius: 2px; cursor: pointer;
  border: 1px solid color-mix(in srgb, var(--cobalt) 30%, var(--line));
  background: color-mix(in srgb, var(--cobalt) calc(var(--s) * 15%), var(--surface));
  color: var(--ink); font: 500 0.88rem/1 var(--f-mono);
  transition: background-color 0.2s ease;
}
.score.hi { color: var(--on-cobalt); }
.score:hover { border-color: var(--cobalt); }
.matrix-table tfoot th { text-align: left; font: 600 0.85rem/1.3 var(--f-body); border-bottom: 0; padding-top: 12px; }
.matrix-table tfoot td { border-bottom: 0; padding-top: 12px; vertical-align: top; }
.total { font: 600 1.15rem/1 var(--f-mono); }
.bar { height: 4px; background: var(--line); margin: 8px auto 0; width: 80%; }
.bar i { display: block; height: 100%; background: var(--ink-3); transition: width 0.3s ease; }
.lead-col .bar i { background: var(--gold); }
.lead-col .total { color: var(--cobalt); }
.matrix-foot { margin-top: 14px; font-size: 0.8rem; color: var(--ink-3); line-height: 1.6; }

/* 客户 */
.clients { border-block: 1px solid var(--line); }
.clients-in { display: flex; flex-wrap: wrap; align-items: baseline; gap: 10px 32px; padding-block: 22px; }
.clients-in .mono-label { flex: none; }
.clients-names { display: flex; flex-wrap: wrap; gap: 6px 28px; font: 600 1.05rem/1.4 var(--f-display); color: var(--ink-2); }

/* ---------- 通用分节 ---------- */
.section { padding-block: clamp(64px, 9vw, 120px); }
.section-alt { background: var(--surface); border-block: 1px solid var(--line); }
.section-head { margin-bottom: clamp(32px, 5vw, 56px); max-width: 40em; }
.section-head h2 { font-size: var(--step-3); margin-top: 12px; }
.section-sub { margin-top: 14px; font: 500 1rem/1.5 var(--f-mono); color: var(--ink-2); letter-spacing: 0.04em; }
.section-head-row { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: end; gap: 16px; max-width: none; }
.fine { margin-top: 20px; font-size: 0.82rem; color: var(--ink-3); }

/* ---------- 合伙人 ---------- */
.partners { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.partner { padding-right: clamp(24px, 4vw, 56px); display: flex; flex-direction: column; gap: 22px; min-width: 0; }
.partner + .partner { padding-right: 0; padding-left: clamp(24px, 4vw, 56px); border-left: 1px solid var(--line); }
@media (max-width: 860px) {
  .partners { grid-template-columns: minmax(0, 1fr); gap: 56px; }
  .partner, .partner + .partner { padding: 0; border-left: 0; }
  .partner + .partner { padding-top: 56px; border-top: 1px solid var(--line); }
}
.partner-top { display: flex; gap: 20px; align-items: flex-end; }
.portrait {
  position: relative; width: 112px; height: 140px; flex: none; overflow: hidden;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px;
  background-color: color-mix(in srgb, var(--cobalt) 6%, var(--surface));
  background-image: repeating-linear-gradient(135deg, transparent 0 11px, color-mix(in srgb, var(--cobalt) 7%, transparent) 11px 12px);
  border: 1px solid color-mix(in srgb, var(--cobalt) 16%, var(--line));
  color: var(--ink);
  font: 600 2.3rem/1 var(--f-display); letter-spacing: 0.06em;
}
.portrait::after { content: ""; width: 22px; height: 2px; background: var(--gold); }
.portrait img { width: 100%; height: 100%; object-fit: cover; }
.portrait.has-photo { background: var(--line); border: 0; }
.portrait.has-photo::after { display: none; }
.partner-name { font-size: var(--step-2); }
.partner-zh { font: 600 1rem/1.4 var(--f-display); color: var(--ink-2); margin-top: 4px; }
.partner-role { margin-top: 10px; font-size: 0.95rem; color: var(--ink); font-weight: 500; }
.partner-loc { margin-top: 2px; font: 400 0.8rem/1.4 var(--f-mono); color: var(--ink-3); }
.creds { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; }
.creds li { font: 400 0.8rem/1.6 var(--f-mono); color: var(--ink-2); }
.creds li::before { content: "/ "; color: var(--ink-3); }
.partner-bio { color: var(--ink-2); max-width: 36em; }
.highlights { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.highlights li { display: grid; grid-template-columns: 18px minmax(0, 1fr); font-size: 0.95rem; }
.highlights li::before { content: "—"; color: var(--ink-3); }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip-static {
  padding: 3px 10px; border: 1px solid var(--line); border-radius: 999px;
  font-size: 0.8rem; color: var(--ink-2); background: var(--surface);
}
.partner-quote { margin-top: auto; padding-top: 20px; border-top: 1px solid var(--line); }
.partner-quote q { quotes: "「" "」"; font: 600 1.2rem/1.6 var(--f-display); }
.partner-quote cite { display: block; margin-top: 6px; font: normal 400 0.78rem/1.4 var(--f-mono); color: var(--ink-3); }

/* ---------- 服务 ---------- */
.services { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 32px 28px; }
@media (max-width: 1000px) { .services { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .services { grid-template-columns: minmax(0, 1fr); } }
.service { border-top: 2px solid var(--ink); padding-top: 18px; display: flex; flex-direction: column; gap: 10px; min-width: 0; }
.service h3 { font-size: var(--step-1); }
.service-len { font: 500 0.75rem/1.4 var(--f-mono); color: var(--cobalt); letter-spacing: 0.04em; }
.service p { color: var(--ink-2); font-size: 0.95rem; }
.service-tools { margin-top: auto; padding-top: 6px; font: 400 0.75rem/1.6 var(--f-mono); color: var(--ink-3); }

/* ---------- 方法 ---------- */
.stages { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); counter-reset: stage; }
@media (max-width: 900px) { .stages { grid-template-columns: repeat(2, minmax(0, 1fr)); row-gap: 40px; } }
@media (max-width: 520px) { .stages { grid-template-columns: minmax(0, 1fr); } }
.stage { position: relative; padding: 0 36px 0 0; display: flex; flex-direction: column; gap: 12px; min-width: 0; }
.stage-head { display: flex; align-items: center; gap: 12px; padding-bottom: 14px; border-bottom: 1px solid var(--ink); }
.stage-name { font: 900 2.2rem/1 var(--f-display); }
.stage-idx { font: 500 0.75rem/1 var(--f-mono); color: var(--ink-3); }
.stage-when { margin-left: auto; font: 500 0.75rem/1.3 var(--f-mono); color: var(--cobalt); text-align: right; }
.stage:not(:last-child) .stage-head::after {
  content: "→"; position: absolute; right: 10px; top: 0.5rem; color: var(--ink-3); font: 400 1.2rem/1 var(--f-mono);
}
@media (max-width: 900px) { .stage .stage-head::after { display: none; } }
.stage p { color: var(--ink-2); font-size: 0.95rem; }
.stage-out { font-size: 0.85rem; color: var(--ink); }
.stage-out b { font: 500 0.72rem/1 var(--f-mono); color: var(--ink-3); letter-spacing: 0.06em; margin-right: 6px; }
.exits {
  margin-top: 48px; padding: 24px; display: grid; grid-template-columns: auto auto minmax(0, 1fr);
  gap: 16px 28px; align-items: center; background: var(--surface); border: 1px solid var(--line);
}
@media (max-width: 760px) { .exits { grid-template-columns: minmax(0, 1fr); } }
.exits-label { font: 600 1rem/1.4 var(--f-display); }
.exit-chips { display: flex; gap: 8px; }
.exit { padding: 6px 16px; font: 600 1rem/1.4 var(--f-display); border: 1px solid var(--ink); }
.exit:nth-child(1) { background: var(--seal-bg); color: var(--seal-fg); border-color: var(--seal-bg); }
.exit:nth-child(3) { color: var(--danger); border-color: var(--danger); }
.exits-note { color: var(--ink-2); font-size: 0.92rem; }

/* ---------- 观点 ---------- */
.section-ink { background: var(--band); color: var(--band-ink); }
.section-ink .mono-label { color: var(--band-mute); }
.principles { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; border-top: 1px solid var(--band-line); }
@media (max-width: 900px) { .principles { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .principles { grid-template-columns: minmax(0, 1fr); } }
.principle { padding: 28px 28px 28px 0; border-bottom: 1px solid var(--band-line); display: flex; flex-direction: column; gap: 12px; min-width: 0; }
.principle h3 { font-size: 1.35rem; color: var(--band-ink); }
.principle h3::before { content: ""; display: block; width: 18px; height: 4px; background: var(--gold); margin-bottom: 14px; }
.principle p { color: var(--band-mute); font-size: 0.95rem; }
.src-link {
  margin-top: auto; align-self: flex-start; background: none; border: 0; padding: 0; cursor: pointer;
  font: 400 0.78rem/1.5 var(--f-mono); color: var(--band-mute); text-align: left;
  text-decoration: underline; text-decoration-color: var(--band-line); text-underline-offset: 3px;
}
.src-link:hover { color: var(--gold); text-decoration-color: currentColor; }
span.src-link { text-decoration: none; cursor: default; }
.formulas { margin-top: 56px; display: grid; gap: 0; }
.formula {
  display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: 6px 24px;
  padding: 16px 0; border-top: 1px solid var(--band-line);
}
.formula code { font: 500 clamp(0.95rem, 0.8rem + 0.7vw, 1.25rem)/1.5 var(--f-mono); color: var(--band-ink); white-space: normal; }
.formula span { font: 400 0.75rem/1.4 var(--f-mono); color: var(--band-mute); }

/* ---------- 文章 ---------- */
.article-count { font: 500 0.85rem/1.4 var(--f-mono); color: var(--ink-3); }
.filters { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px 24px; margin-bottom: 32px; }
.chip-row { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  min-height: 36px; padding: 0 14px; border-radius: 999px; cursor: pointer;
  border: 1px solid var(--line); background: transparent; color: var(--ink-2);
  font: 500 0.88rem/1 var(--f-body);
}
.chip:hover { border-color: var(--ink); color: var(--ink); }
.chip[aria-pressed="true"] { background: var(--ink); border-color: var(--ink); color: var(--paper); }

.featured { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; margin-bottom: 24px; }
.featured:empty { display: none; }
@media (max-width: 860px) { .featured { grid-template-columns: minmax(0, 1fr); } }
.articles { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
@media (max-width: 1000px) { .articles { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 600px) { .articles { grid-template-columns: minmax(0, 1fr); } }

.card {
  position: relative; display: flex; flex-direction: column; min-width: 0;
  background: var(--surface); border: 1px solid var(--line);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}
.card:hover { border-color: color-mix(in srgb, var(--ink) 40%, var(--line)); box-shadow: var(--shadow); transform: translateY(-2px); }
.card-open {
  all: unset; cursor: pointer; display: flex; flex-direction: column; flex: 1; min-width: 0;
}
.card-open:focus-visible { outline: 2px solid var(--cobalt); outline-offset: 2px; }
.cover {
  aspect-ratio: 4 / 3; max-width: 100%; overflow: hidden; border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--cobalt) 9%, var(--surface));
  padding: 18px 18px 0;
}
.cover img {
  width: 100%; height: 100%; object-fit: cover; object-position: top center; background: #fff;
  box-shadow: 0 2px 4px rgba(15, 26, 54, 0.08), 0 10px 24px -8px rgba(15, 26, 54, 0.3);
  transition: transform 0.3s ease;
}
.card:hover .cover img { transform: translateY(-4px); }
.cover:has(.cover-type) { padding: 0; }
.cover-type {
  height: 100%; display: flex; flex-direction: column; justify-content: center; gap: 10px; padding: 24px;
  background: var(--seal-bg); color: var(--seal-fg);
}
.cover-type b { font: 900 1.5rem/1.3 var(--f-display); }
.cover-type small { font: 400 0.75rem/1.4 var(--f-mono); color: #fff; opacity: 0.8; }
.card-body { padding: 18px 20px 20px; display: flex; flex-direction: column; gap: 8px; flex: 1; min-width: 0; }
.card-meta { display: flex; flex-wrap: wrap; gap: 4px 10px; font: 400 0.74rem/1.5 var(--f-mono); color: var(--ink-3); }
.card-meta .topic { color: var(--cobalt); }
.card h3 { font-size: 1.25rem; }
.card-sub { font-size: 0.88rem; color: var(--ink-2); margin-top: -4px; }
.card-sum {
  font-size: 0.9rem; color: var(--ink-2); line-height: 1.7;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}
.card-by { margin-top: auto; padding-top: 10px; font-size: 0.82rem; color: var(--ink); font-weight: 500; }
.card.feat { flex-direction: row; }
.card.feat .card-open { flex-direction: row; }
.card.feat .cover { width: 48%; flex: none; aspect-ratio: auto; min-height: 260px; border-bottom: 0; border-right: 1px solid var(--line); }
.card.feat h3 { font-size: 1.55rem; }
.card.feat .card-sum { -webkit-line-clamp: 5; }
.card.feat .card-body { padding: 24px; }
@media (max-width: 520px) {
  .card.feat .card-open { flex-direction: column; }
  .card.feat .cover { width: 100%; aspect-ratio: 4 / 3; min-height: 0; border-right: 0; border-bottom: 1px solid var(--line); }
}
.empty { padding: 48px 0; text-align: center; color: var(--ink-3); }

/* ---------- 联系 ---------- */
.contact { border-top: 1px solid var(--line); }
.contact-grid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr); gap: 48px; align-items: end; }
@media (max-width: 860px) { .contact-grid { grid-template-columns: minmax(0, 1fr); } }
.contact-title { font-size: var(--step-3); margin-top: 12px; }
.contact-list { margin: 0; display: grid; gap: 0; border-top: 1px solid var(--ink); }
.contact-list div { display: grid; grid-template-columns: 88px minmax(0, 1fr) auto; gap: 12px; align-items: center; padding: 16px 0; border-bottom: 1px solid var(--line); }
.contact-list dt { font: 500 0.75rem/1.4 var(--f-mono); letter-spacing: 0.06em; color: var(--ink-3); text-transform: uppercase; }
.contact-list dd { margin: 0; font-size: 1.02rem; overflow-wrap: anywhere; user-select: all; }
.copy { min-height: 32px; padding: 0 10px; border: 1px solid var(--line); background: transparent; color: var(--ink-2); border-radius: var(--radius); cursor: pointer; font: 400 0.78rem/1 var(--f-mono); }
.copy:hover { border-color: var(--ink); color: var(--ink); }

.footer { border-top: 1px solid var(--line); padding-block: 28px; font: 400 0.8rem/1.5 var(--f-mono); color: var(--ink-3); }
.footer-in { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px; }

/* ---------- 对话框 ---------- */
dialog { border: 0; padding: 0; color: var(--ink); background: var(--surface); box-shadow: var(--shadow); }
dialog::backdrop { background: rgba(5, 9, 22, 0.62); backdrop-filter: blur(2px); }
.reader[open] { width: min(1100px, 96vw); height: min(92vh, 1000px); display: flex; flex-direction: column; }
.reader-bar { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 12px; padding: 14px 18px; border-bottom: 1px solid var(--line); }
.reader-meta { min-width: 0; }
.reader-meta h3 { font-size: 1.2rem; }
.reader-actions { display: flex; gap: 8px; }
.reader iframe { flex: 1; width: 100%; border: 0; background: #525659; }

.toast {
  position: fixed; left: 50%; bottom: calc(24px + env(safe-area-inset-bottom, 0px)); z-index: 60;
  transform: translate(-50%, 20px); opacity: 0; pointer-events: none;
  padding: 12px 18px; background: var(--ink); color: var(--paper); font-size: 0.9rem;
  transition: opacity 0.2s ease, transform 0.2s ease; max-width: calc(100vw - 32px);
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* 手机上让决策矩阵完整放下，不用横向滚动 */
@media (max-width: 480px) {
  .matrix { padding: 16px 12px 14px; }
  .matrix-table { min-width: 0; }
  .matrix-table thead th { font-size: 0.74rem; }
  .matrix-table tbody th { font-size: 0.76rem; }
  .crit-key { margin-right: 3px; }
  .crit-w { margin-left: 1.1em; }
  .score { width: 28px; height: 28px; font-size: 0.8rem; }
  .total { font-size: 0.98rem; }
}

@media (max-width: 760px) { html { scroll-padding-top: 120px; } }