/* ============================================================
   王者赏金赛苹果 · 记录簿  /assets/site.css
   共享外壳：reset、变量、中文排版、头部、页脚、通用组件
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; }

:root {
  --paper: #F6F1E7;
  --paper-raised: #FFFDF8;
  --ink: #14161B;
  --gold: #D4A017;
  --gold-bright: #F0C64B;
  --gold-deep: #8A6A12;
  --silver: #C7CDD4;
  --violet: #7B4DFF;
  --violet-ink: #5433C4;
  --blue: #2E9BFF;
  --blue-ink: #1A5FA8;
  --red: #C8402F;
  --slate: #5A6472;
  --night: #1E1B33;

  --line: rgba(20, 22, 27, .1);
  --line-strong: rgba(20, 22, 27, .18);
  --line-light: rgba(199, 205, 212, .22);

  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-serif: "Songti SC", "Source Han Serif SC", "Noto Serif SC", Georgia, "Times New Roman", serif;
  --font-mono: "SFMono-Regular", Menlo, Consolas, "Liberation Mono", "Courier New", monospace;
  --font-display: var(--font-sans);

  --shell: 1180px;
  --gutter: clamp(18px, 4vw, 40px);
  --radius-sm: 10px;
  --radius: 18px;
  --radius-lg: 28px;
  --radius-pill: 999px;

  --ease: cubic-bezier(.22, .61, .36, 1);
}

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4, p, ul, ol, figure, blockquote { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; }
input { font: inherit; }
img, svg { display: block; max-width: 100%; }
table { border-collapse: collapse; }

:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- 容器 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- skip link ---------- */
.skip-link {
  position: absolute;
  top: 0; left: -9999px;
  z-index: 300;
  padding: 12px 22px;
  background: var(--gold);
  color: var(--ink);
  font-weight: 700;
  letter-spacing: .08em;
  border-radius: 0 0 14px 0;
}
.skip-link:focus { left: 0; }

/* ---------- 阅读进度 ---------- */
.scroll-progress {
  position: fixed;
  inset: 0 0 auto 0;
  height: 3px;
  z-index: 200;
  background: rgba(199, 205, 212, .16);
  pointer-events: none;
}
.scroll-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--gold-deep), var(--gold) 55%, var(--gold-bright));
}

/* ============================================================
   头部
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 120;
  background: var(--ink);
  color: var(--paper);
  box-shadow: 0 1px 0 rgba(212, 160, 23, .3), 0 22px 44px -38px rgba(0, 0, 0, .95);
}

.utility-strip {
  background: var(--night);
  color: var(--silver);
  border-bottom: 1px solid rgba(199, 205, 212, .1);
}
.utility-strip__inner {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 32px;
  font-size: 12px;
  letter-spacing: .1em;
}
.utility-strip__dot {
  flex: none;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 3px rgba(212, 160, 23, .18);
}
.utility-strip__text {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.header-main__inner {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 18px;
  padding: 10px 0 12px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  padding: 4px 0;
}
.brand__mark {
  flex: none;
  display: grid;
  place-items: center;
  width: 40px; height: 40px;
  border-radius: 14px;
  background: linear-gradient(150deg, var(--gold-bright), var(--gold) 46%, var(--gold-deep));
  color: var(--ink);
  font-size: 19px;
  font-weight: 800;
  letter-spacing: 0;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .55);
}
.brand__text { min-width: 0; }
.brand__name {
  display: block;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .06em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.brand__desc {
  display: block;
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--silver);
}

/* 命令栏 / 索引检索 */
.command-bar {
  position: relative;
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  max-width: 470px;
  padding: 4px 4px 4px 15px;
  border: 1px solid var(--line-light);
  border-radius: var(--radius-pill);
  background: rgba(246, 241, 231, .05);
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease);
}
.command-bar:focus-within {
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(212, 160, 23, .16);
}
.command-bar__label {
  flex: none;
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--gold);
  white-space: nowrap;
}
.command-bar__label::after {
  content: "/";
  margin-left: 9px;
  color: rgba(199, 205, 212, .35);
}
.command-bar__input {
  flex: 1 1 auto;
  min-width: 0;
  padding: 8px 0;
  border: 0;
  background: transparent;
  color: var(--paper);
  font-size: 13px;
  letter-spacing: .05em;
}
.command-bar__input:focus { outline: none; }
.command-bar__input::placeholder { color: rgba(199, 205, 212, .55); }
.command-bar__go {
  flex: none;
  padding: 8px 17px;
  border: 0;
  border-radius: var(--radius-pill);
  background: linear-gradient(140deg, var(--gold), var(--gold-deep));
  color: var(--ink);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .1em;
  cursor: pointer;
  transition: filter .18s var(--ease);
}
.command-bar__go:hover { filter: brightness(1.08); }
.command-bar__feedback {
  position: absolute;
  left: 15px;
  top: calc(100% + 8px);
  z-index: 6;
  max-width: 90%;
  padding: 7px 13px;
  border-radius: 10px;
  background: var(--night);
  color: var(--silver);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  box-shadow: 0 16px 28px -22px rgba(0, 0, 0, .95);
  display: none;
}
.command-bar__feedback.is-visible { display: block; }

/* 移动菜单键 */
.nav-toggle {
  justify-self: end;
  display: none;
  align-items: center;
  gap: 9px;
  padding: 9px 15px;
  border: 1px solid var(--line-light);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--paper);
  font-size: 13px;
  letter-spacing: .1em;
  cursor: pointer;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.nav-toggle:hover { color: var(--gold); border-color: var(--gold); }
.nav-toggle__bars {
  position: relative;
  width: 16px; height: 10px;
  border-top: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
}
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0; right: 0; top: 2px;
  height: 2px;
  background: currentColor;
}

/* 主导航 */
.site-nav {
  display: block;
  border-top: 1px solid rgba(199, 205, 212, .14);
  background: linear-gradient(180deg, rgba(30, 27, 51, 0) 0%, rgba(30, 27, 51, .55) 100%);
}
.site-nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.site-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
  flex-wrap: wrap;
}
.site-nav__link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 12px 14px;
  border-radius: 12px 12px 0 0;
  color: var(--silver);
  font-size: 13.5px;
  letter-spacing: .06em;
  transition: color .18s var(--ease), background-color .18s var(--ease);
}
.site-nav__index {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .08em;
  color: rgba(199, 205, 212, .45);
}
.site-nav__link:hover { color: var(--paper); background: rgba(246, 241, 231, .07); }
.site-nav__link:hover .site-nav__index { color: var(--gold); }
.site-nav__link[aria-current="page"] { color: var(--gold); }
.site-nav__link[aria-current="page"] .site-nav__index { color: var(--gold); }
.site-nav__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 14px; right: 14px; bottom: 6px;
  height: 2px;
  border-radius: 2px;
  background: var(--gold);
}
.site-nav__actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 15px;
  border: 1px solid var(--line-light);
  border-radius: var(--radius-pill);
  color: var(--silver);
  font-size: 12.5px;
  letter-spacing: .1em;
  transition: color .18s var(--ease), border-color .18s var(--ease), background-color .18s var(--ease);
}
.pill:hover { color: var(--gold); border-color: var(--gold); }
.pill--violet {
  background: var(--violet);
  border-color: transparent;
  color: #FFFFFF;
}
.pill--violet:hover { background: #6A3BEB; color: #FFFFFF; }

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  margin-top: clamp(56px, 9vw, 112px);
  padding-top: clamp(40px, 6vw, 76px);
  background: var(--night);
  color: var(--paper);
  border-top: 1px solid rgba(212, 160, 23, .4);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr repeat(3, 1fr);
  gap: clamp(24px, 3.5vw, 48px);
  padding-bottom: clamp(28px, 4vw, 46px);
}
.footer-brand__mark {
  display: grid;
  place-items: center;
  width: 44px; height: 44px;
  margin-bottom: 14px;
  border-radius: 15px;
  background: linear-gradient(150deg, var(--gold-bright), var(--gold) 46%, var(--gold-deep));
  color: var(--night);
  font-size: 20px;
  font-weight: 800;
}
.footer-brand__title {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: .08em;
}
.footer-brand__sub {
  margin-top: 4px;
  font-size: 12.5px;
  letter-spacing: .16em;
  color: var(--silver);
}
.footer-brand__meta {
  max-width: 34ch;
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(199, 205, 212, .75);
}
.footer-col__title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .24em;
  color: var(--gold);
}
.footer-col__list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-col__list a {
  font-size: 14px;
  color: var(--silver);
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.footer-col__list a:hover { color: var(--paper); border-color: var(--gold); }

/* 报错编号速记条 */
.report-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 18px 20px;
  border: 1px solid rgba(200, 64, 47, .5);
  border-radius: var(--radius);
  background: linear-gradient(120deg, rgba(200, 64, 47, .18), rgba(20, 22, 27, .5) 70%);
}
.report-strip__field {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  flex: 1 1 320px;
}
.report-strip__field label {
  font-size: 12px;
  letter-spacing: .14em;
  color: #F0B4A8;
}
.report-strip__field input {
  width: min(230px, 60vw);
  padding: 9px 15px;
  border: 1px solid rgba(199, 205, 212, .3);
  border-radius: var(--radius-pill);
  background: rgba(20, 22, 27, .6);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
}
.report-strip__field input:focus {
  outline: none;
  border-color: var(--gold);
}
.report-strip__field input::placeholder { color: rgba(199, 205, 212, .45); }
.report-strip__copy {
  padding: 9px 18px;
  border: 0;
  border-radius: var(--radius-pill);
  background: linear-gradient(140deg, var(--gold), var(--gold-deep));
  color: var(--ink);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .1em;
  cursor: pointer;
  transition: filter .18s var(--ease);
}
.report-strip__copy:hover { filter: brightness(1.08); }
.report-strip__msg {
  flex-basis: 100%;
  min-height: 1em;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--silver);
}

/* 订阅开关 */
.subscribe-switch {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.subscribe-switch__label {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--silver);
}
.switch {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--silver);
  cursor: pointer;
  user-select: none;
}
.switch input {
  position: absolute;
  width: 1px; height: 1px;
  opacity: 0;
  pointer-events: none;
}
.switch__track {
  position: relative;
  display: block;
  width: 34px; height: 18px;
  border-radius: var(--radius-pill);
  background: rgba(199, 205, 212, .25);
  transition: background-color .2s var(--ease);
}
.switch__track::after {
  content: "";
  position: absolute;
  top: 2px; left: 2px;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--paper);
  transition: transform .2s var(--ease);
}
.switch input:checked + .switch__track { background: var(--violet); }
.switch input:checked + .switch__track::after { transform: translateX(16px); }
.switch input:focus-visible + .switch__track {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}
.switch__text { white-space: nowrap; }

/* 联系方式与备案 */
.footer-contact {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 30px;
  padding: 22px 0;
  border-top: 1px solid rgba(199, 205, 212, .16);
  font-size: 13px;
  letter-spacing: .05em;
  color: var(--silver);
}
.footer-contact__item { margin: 0; }
.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 30px;
  padding: 18px 0 36px;
  border-top: 1px solid rgba(199, 205, 212, .12);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: rgba(199, 205, 212, .65);
}
.footer-legal p { margin: 0; }

/* ============================================================
   通用组件（供页面阶段复用）
   ============================================================ */
.page-head { padding: clamp(36px, 6vw, 84px) 0 clamp(20px, 3vw, 36px); }

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-top: 20px;
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--slate);
}
.breadcrumb li { display: inline-flex; align-items: center; gap: 8px; }
.breadcrumb li:not(:last-child)::after {
  content: "/";
  color: rgba(90, 100, 114, .45);
}
.breadcrumb a {
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.breadcrumb a:hover { color: var(--ink); border-color: var(--gold); }
.breadcrumb [aria-current="page"] { color: var(--ink); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--gold-deep);
}

.section-head { margin-bottom: clamp(18px, 2.4vw, 30px); }
.section-title {
  font-family: var(--font-serif);
  font-size: clamp(24px, 3.2vw, 40px);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: .01em;
}
.section-sub {
  margin-top: 10px;
  max-width: 62ch;
  font-size: 15px;
  color: var(--slate);
}

.prose {
  max-width: 680px;
  font-size: 17px;
  line-height: 1.75;
}
.prose > * + * { margin-top: 1.1em; }
.prose h2 {
  margin-top: 2em;
  font-family: var(--font-serif);
  font-size: clamp(22px, 2.6vw, 30px);
  font-weight: 600;
  line-height: 1.3;
}
.prose h3 {
  margin-top: 1.8em;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: .02em;
}
.prose ul, .prose ol {
  padding-left: 1.2em;
  list-style: disc;
}
.prose ol { list-style: decimal; }
.prose li + li { margin-top: .5em; }
.prose a {
  color: var(--blue-ink);
  border-bottom: 1px solid rgba(26, 95, 168, .35);
}
.prose a:hover { border-color: var(--blue-ink); }
.prose code, .code {
  padding: 1px 7px;
  border: 1px solid rgba(46, 155, 255, .28);
  border-radius: 6px;
  background: rgba(46, 155, 255, .12);
  color: var(--blue-ink);
  font-family: var(--font-mono);
  font-size: .9em;
  letter-spacing: .04em;
}

.grid { display: grid; gap: clamp(16px, 2.4vw, 28px); }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(228px, 1fr)); }

.card {
  padding: clamp(20px, 2.4vw, 28px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--paper-raised);
  box-shadow: 0 1px 0 rgba(20, 22, 27, .04), 0 22px 44px -40px rgba(20, 22, 27, .75);
}
.card__title {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: .02em;
}
.card__meta {
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--slate);
}
.card__text {
  margin-top: 12px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--slate);
}
.card--night {
  background: var(--night);
  color: var(--paper);
  border-color: rgba(212, 160, 23, .28);
}
.card--night .card__text, .card--night .card__meta { color: rgba(199, 205, 212, .82); }

.stat { display: flex; flex-direction: column; gap: 8px; }
.stat__value {
  font-family: var(--font-display);
  font-size: clamp(40px, 7vw, 88px);
  font-weight: 800;
  line-height: .95;
  letter-spacing: -.01em;
}
.stat__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--slate);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px;
  border-radius: var(--radius-pill);
  background: rgba(20, 22, 27, .06);
  color: var(--slate);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
}
.tag--gold { background: rgba(212, 160, 23, .2); color: var(--gold-deep); }
.tag--violet { background: rgba(123, 77, 255, .16); color: var(--violet-ink); }
.tag--blue { background: rgba(46, 155, 255, .16); color: var(--blue-ink); }
.tag--red { background: rgba(200, 64, 47, .14); color: var(--red); }

.break-band {
  padding: clamp(32px, 6vw, 76px);
  border-radius: var(--radius-lg);
  background: var(--night);
  color: var(--paper);
}
.break-band--gold {
  background: linear-gradient(135deg, var(--gold-bright), var(--gold) 45%, var(--gold-deep));
  color: var(--ink);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .08em;
  cursor: pointer;
  transition: transform .18s var(--ease), background-color .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}
.btn--primary { background: linear-gradient(135deg, var(--gold), var(--gold-deep)); color: var(--ink); }
.btn--outline { border-color: var(--ink); color: var(--ink); }
.btn--outline:hover { background: var(--ink); color: var(--paper); }
.btn--violet { background: var(--violet); color: #FFFFFF; }
.btn--blue { background: var(--blue); color: #0B1220; }
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

/* 折叠面板 */
.panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-raised);
  overflow: hidden;
}
.panel + .panel { margin-top: 10px; }
.panel__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 16px 20px;
  border: 0;
  background: transparent;
  text-align: left;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .02em;
  cursor: pointer;
}
.panel__head::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--gold-deep);
}
[data-panel][data-open] .panel__head::after { content: "–"; }
.panel__body {
  display: none;
  padding: 0 20px 18px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--slate);
}
[data-panel][data-open] .panel__body { display: block; }

/* 章节索引轨道 */
.index-rail {
  display: flex;
  flex-direction: column;
  gap: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
}
.index-rail__link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 13px;
  border-radius: var(--radius-pill);
  color: var(--slate);
  transition: color .18s var(--ease), background-color .18s var(--ease);
}
.index-rail__link:hover { color: var(--ink); background: rgba(212, 160, 23, .12); }
.index-rail__link.is-active {
  color: var(--ink);
  background: rgba(212, 160, 23, .2);
  font-weight: 700;
}
.index-rail__link.is-active .index-rail__num { color: var(--gold-deep); }
.index-rail__num { color: rgba(90, 100, 114, .7); }

/* 图版容器基础规则 */
.figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(140deg, #EDE7DA 0%, var(--silver) 100%);
  aspect-ratio: var(--figure-ratio, 16 / 10);
}
.figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.figure--wide { --figure-ratio: 21 / 9; }
.figure--tall { --figure-ratio: 3 / 4; }
.figure--square { --figure-ratio: 1 / 1; }
.figure__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--slate);
}

/* 索引检索命中高亮 */
.is-index-hit {
  border-radius: 10px;
  box-shadow: 0 0 0 3px rgba(212, 160, 23, .5);
  transition: box-shadow .3s var(--ease);
}

[data-section] { scroll-margin-top: 150px; }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }

  .header-main__inner {
    grid-template-columns: 1fr auto;
    grid-template-areas:
      "brand toggle"
      "cmd cmd";
    row-gap: 10px;
  }
  .brand { grid-area: brand; flex: 1 1 auto; }
  .nav-toggle { grid-area: toggle; }
  .command-bar {
    grid-area: cmd;
    justify-self: stretch;
    max-width: none;
  }

  .site-nav { display: none; }
  .site-nav[data-open] { display: block; }
  .site-nav__inner {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
    padding: 6px 0 18px;
  }
  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }
  .site-nav__link {
    padding: 13px 14px;
    border-radius: 12px;
  }
  .site-nav__link[aria-current="page"]::after {
    left: 0; right: auto; bottom: 10px;
    width: 3px; height: 20px;
    border-radius: 3px;
  }
  .site-nav__actions {
    padding-top: 12px;
    border-top: 1px solid rgba(199, 205, 212, .14);
  }
}

@media (max-width: 640px) {
  body { font-size: 15.5px; }
  .utility-strip__inner { font-size: 11px; letter-spacing: .06em; }
  .brand__mark { width: 34px; height: 34px; border-radius: 11px; font-size: 16px; }
  .brand__name { font-size: 13.5px; }
  .brand__desc { display: none; }
  .command-bar { padding-left: 12px; }
  .command-bar__label {
    position: absolute;
    width: 1px; height: 1px;
    margin: -1px; padding: 0;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
    border: 0;
  }
  .footer-grid { grid-template-columns: 1fr; }
  .report-strip { padding: 16px; }
  .report-strip__field input { width: 100%; }
  .footer-legal { padding-bottom: 28px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
  .btn:hover { transform: none; }
}