/* FH赛场 — /assets/site.css
   共享外壳：reset · 变量 · 中文排版 · 页头 · 页脚 · 通用组件 */

/* ---------- 1. reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; background: #0B1A26; }

body,
h1, h2, h3, h4, h5, h6,
p, figure, blockquote, dl, dd, hr { margin: 0; }

ul, ol { margin: 0; padding: 0; list-style: none; }

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

button { font: inherit; color: inherit; background: none; border: 0; padding: 0; }

a { color: inherit; text-decoration: none; }

table { border-collapse: collapse; width: 100%; }

/* ---------- 2. 变量 ---------- */
:root {
  /* 品牌色 */
  --ink-900: #0B1A26;
  --ink-800: #0E2130;
  --ink-700: #12293A;
  --pitch-600: #16794C;
  --green-400: #2FA36B;
  --whistle-300: #E9FF5A;
  --whistle-600: #C9DE2E;
  --card-500: #D9382F;
  --card-amber: #F0B429;
  --paper-050: #F5F7F4;
  --paper-100: #EDF1ED;
  --text-900: #16232C;
  --text-600: #4A5B66;
  --line-300: #D5DEDA;
  --on-ink: #F5F7F4;
  --on-ink-dim: rgba(245, 247, 244, .68);
  --on-ink-faint: rgba(245, 247, 244, .42);

  /* 字体 */
  --font-display: "Helvetica Neue", "Arial Narrow", Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", SimSun, Georgia, serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;

  /* 布局 */
  --wrap: 1200px;
  --gutter: clamp(1rem, 4vw, 2.25rem);
  --radius: 3px;
}

/* ---------- 3. 中文排版基础 ---------- */
body {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.75;
  color: var(--text-900);
  background: var(--paper-050);
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -.02em;
  text-wrap: balance;
  color: inherit;
}

p { text-wrap: pretty; }

strong, b { font-weight: 700; }

#main-content { scroll-margin-top: 1.5rem; }

/* ---------- 4. 工具 ---------- */
.wrap {
  width: min(calc(100% - var(--gutter) * 2), var(--wrap));
  margin-inline: auto;
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* ---------- 5. 跳至主内容 ---------- */
.skip-link {
  position: fixed;
  top: .5rem;
  left: .5rem;
  z-index: 300;
  padding: .7rem 1.15rem;
  background: var(--whistle-300);
  color: var(--ink-900);
  font-family: var(--font-mono);
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .08em;
  border-radius: 2px;
  transform: translateY(-180%);
  transition: transform .18s ease;
}

.skip-link:focus,
.skip-link:focus-visible { transform: translateY(0); }

/* ---------- 6. 页头 ---------- */
.site-header {
  position: relative;
  background: var(--ink-900);
  color: var(--on-ink);
  isolation: isolate;
}

.masthead {
  position: relative;
  background:
    radial-gradient(120% 170% at 88% -50%, rgba(47, 163, 107, .44) 0%, rgba(47, 163, 107, 0) 58%),
    radial-gradient(90% 140% at 4% 150%, rgba(233, 255, 90, .16) 0%, rgba(233, 255, 90, 0) 56%),
    linear-gradient(180deg, #0C1D2A 0%, #0B1A26 100%);
}

.masthead::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(90deg, rgba(245, 247, 244, .045) 0 1px, transparent 1px 64px);
  pointer-events: none;
}

.masthead::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 2px;
  background: linear-gradient(90deg, var(--pitch-600) 0%, var(--whistle-300) 34%, var(--card-500) 62%, transparent 100%);
  opacity: .9;
  pointer-events: none;
}

.masthead__inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1rem;
  min-height: 84px;
  padding-block: .9rem;
}

.masthead__tag {
  justify-self: start;
  max-width: 16em;
  font-family: var(--font-mono);
  font-size: .7rem;
  line-height: 1.6;
  letter-spacing: .2em;
  color: var(--on-ink-faint);
}

.masthead__brand {
  justify-self: center;
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  padding: .15rem .25rem;
}

.brand-mark {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 2.3rem;
  height: 2.3rem;
  background: var(--whistle-300);
  color: var(--ink-900);
  font-family: var(--font-mono);
  font-size: .85rem;
  font-weight: 700;
  letter-spacing: .02em;
  border-radius: 2px;
  transform: skewX(-9deg);
  transition: transform .2s ease, background-color .2s ease;
}

.masthead__brand:hover .brand-mark {
  background: var(--whistle-600);
  transform: skewX(-9deg) translateY(-2px);
}

.masthead__name {
  font-family: var(--font-serif);
  font-size: clamp(1.45rem, 2.4vw, 1.95rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: .1em;
  color: var(--on-ink);
}

.masthead__meta {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: .55rem;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .08em;
  color: var(--on-ink-dim);
  white-space: nowrap;
}

.status-dot {
  width: .5rem;
  height: .5rem;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--whistle-300);
  box-shadow: 0 0 0 3px rgba(233, 255, 90, .15);
}

.masthead__status { color: var(--whistle-600); font-weight: 500; }

.masthead__date { color: var(--on-ink-faint); font-variant-numeric: tabular-nums; }

/* 导航 */
.site-nav {
  position: relative;
  z-index: 2;
  background: rgba(18, 41, 58, .55);
  border-top: 1px solid rgba(245, 247, 244, .1);
}

.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: .2rem clamp(.5rem, 2.4vw, 1.9rem);
  width: min(calc(100% - var(--gutter) * 2), var(--wrap));
  margin-inline: auto;
}

.site-nav__link {
  position: relative;
  display: inline-block;
  padding: .88rem .2rem .76rem;
  font-size: .94rem;
  font-weight: 500;
  letter-spacing: .05em;
  color: var(--on-ink-dim);
  border-bottom: 2px solid transparent;
  transition: color .18s ease, border-color .18s ease;
}

.site-nav__link:hover { color: var(--on-ink); }

.site-nav__link[aria-current="page"] {
  color: var(--whistle-300);
  border-bottom-color: var(--whistle-300);
}

/* 汉堡按钮（桌面隐藏） */
.nav-toggle { display: none; }

.nav-toggle__label {
  font-family: var(--font-mono);
  letter-spacing: .14em;
}

/* 比分条 */
.score-ticker {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: stretch;
  background: linear-gradient(90deg, rgba(22, 121, 76, .38) 0%, rgba(18, 41, 58, .55) 46%, rgba(217, 56, 47, .3) 100%);
  border-top: 1px solid rgba(233, 255, 90, .18);
}

.score-ticker__label {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  padding: .5rem 1.55rem .5rem var(--gutter);
  background: var(--whistle-300);
  color: var(--ink-900);
  font-family: var(--font-mono);
  font-size: .66rem;
  font-weight: 700;
  letter-spacing: .18em;
  white-space: nowrap;
  clip-path: polygon(0 0, 100% 0, calc(100% - 16px) 100%, 0 100%);
}

.score-ticker__track {
  flex: 1 1 auto;
  display: flex;
  align-items: center;
  gap: .45rem;
  padding: .5rem .75rem;
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: thin;
  scrollbar-color: rgba(233, 255, 90, .5) transparent;
  -webkit-overflow-scrolling: touch;
}

.score-ticker__track::-webkit-scrollbar { height: 4px; }
.score-ticker__track::-webkit-scrollbar-track { background: transparent; }
.score-ticker__track::-webkit-scrollbar-thumb { background: rgba(233, 255, 90, .45); border-radius: 2px; }

.score-chip {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .28rem .62rem;
  border: 1px solid rgba(245, 247, 244, .16);
  border-radius: 2px;
  background: rgba(11, 26, 38, .5);
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .04em;
  color: var(--on-ink);
  white-space: nowrap;
}

.score-chip__team { color: var(--on-ink-dim); }

.score-chip__score {
  font-weight: 700;
  color: var(--whistle-300);
  font-variant-numeric: tabular-nums;
}

.score-chip__state {
  padding-left: .45rem;
  border-left: 1px solid rgba(245, 247, 244, .18);
  font-size: .62rem;
  letter-spacing: .12em;
  color: rgba(245, 247, 244, .72);
}

.score-chip--live { border-color: rgba(233, 255, 90, .55); }
.score-chip--final { opacity: .72; }
.score-chip--red .score-chip__state { color: #FF9F98; border-left-color: rgba(217, 56, 47, .6); }
.score-chip--amber .score-chip__state { color: var(--card-amber); border-left-color: rgba(240, 180, 41, .55); }

.score-ticker__more {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  margin-left: .3rem;
  padding: .3rem .72rem;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .12em;
  color: var(--ink-900);
  background: var(--green-400);
  border-radius: 2px;
  white-space: nowrap;
  transition: background-color .18s ease, color .18s ease;
}

.score-ticker__more:hover { background: var(--whistle-300); }

/* 滚动进度 */
.scroll-progress {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 3px;
  z-index: 120;
  pointer-events: none;
  background: rgba(11, 26, 38, .22);
}

.scroll-progress__bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--green-400), var(--whistle-300));
}

/* ---------- 7. 页头响应式 ---------- */
@media (max-width: 880px) {
  .masthead__inner {
    grid-template-columns: 1fr;
    min-height: 0;
    padding-block: .95rem;
  }

  .masthead__tag,
  .masthead__meta { display: none; }

  .masthead__brand { justify-self: center; }
  .masthead__name { font-size: 1.5rem; }

  .nav-toggle {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    position: absolute;
    top: .85rem;
    right: var(--gutter);
    z-index: 5;
    padding: .5rem .7rem;
    border: 1px solid rgba(245, 247, 244, .28);
    border-radius: 2px;
    background: rgba(11, 26, 38, .6);
    color: var(--on-ink);
    font-size: .68rem;
    cursor: pointer;
    transition: border-color .18s ease, color .18s ease;
  }

  .nav-toggle__bars {
    display: grid;
    gap: 3px;
    width: 15px;
  }

  .nav-toggle__bars span {
    display: block;
    height: 2px;
    background: currentColor;
    border-radius: 1px;
    transition: transform .2s ease, opacity .2s ease;
  }

  .site-header[data-open="true"] .nav-toggle {
    border-color: var(--whistle-300);
    color: var(--whistle-300);
  }

  .site-header[data-open="true"] .nav-toggle__bars span:nth-child(1) { transform: translateY(5px) rotate(45deg); }
  .site-header[data-open="true"] .nav-toggle__bars span:nth-child(2) { opacity: 0; }
  .site-header[data-open="true"] .nav-toggle__bars span:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

  .site-nav {
    background: linear-gradient(180deg, #102736 0%, #0B1A26 100%);
    border-top: 0;
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), 0 100%);
    transition: max-height .32s ease, visibility .32s;
  }

  .site-header[data-open="true"] .site-nav {
    max-height: 32rem;
    visibility: visible;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
    padding: .35rem var(--gutter) 1.6rem;
  }

  .site-nav__link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: .95rem .2rem;
    border-bottom: 1px solid rgba(245, 247, 244, .09);
  }

  .site-nav__link::after {
    content: "→";
    font-family: var(--font-mono);
    font-size: .8rem;
    opacity: .35;
  }

  .site-nav__link[aria-current="page"] { border-bottom-color: rgba(233, 255, 90, .55); }

  .site-nav__link[aria-current="page"]::after {
    opacity: 1;
    color: var(--whistle-300);
  }

  .score-ticker__label { letter-spacing: .12em; padding-right: 1.4rem; }
}

/* ---------- 8. 页脚 ---------- */
.site-footer {
  position: relative;
  color: var(--on-ink-dim);
  background:
    radial-gradient(110% 150% at 0% 0%, rgba(22, 121, 76, .42) 0%, rgba(22, 121, 76, 0) 58%),
    radial-gradient(90% 130% at 100% 100%, rgba(217, 56, 47, .24) 0%, rgba(217, 56, 47, 0) 52%),
    var(--ink-900);
  border-top: 3px solid var(--whistle-300);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(90deg, rgba(245, 247, 244, .035) 0 1px, transparent 1px 72px);
  pointer-events: none;
}

.footer__grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.35fr;
  gap: clamp(1.75rem, 4vw, 3rem);
  padding-block: clamp(2.5rem, 5vw, 4rem);
}

.footer__col { min-width: 0; }

.footer__brand {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  margin-bottom: 1rem;
}

.footer__brand-name {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--on-ink);
}

.footer__text {
  max-width: 32ch;
  font-size: .88rem;
  line-height: 1.8;
  color: var(--on-ink-dim);
}

.footer__hours {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  margin-top: 1.1rem;
  padding: .3rem .62rem;
  border: 1px dashed rgba(201, 222, 46, .45);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .1em;
  color: var(--whistle-600);
}

.footer__title {
  display: flex;
  align-items: center;
  gap: .5rem;
  margin-bottom: 1.1rem;
  font-family: var(--font-mono);
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .2em;
  line-height: 1.4;
  color: var(--whistle-600);
}

.footer__title::before {
  content: "";
  width: 18px;
  height: 1px;
  background: var(--whistle-600);
}

.footer__list li + li { margin-top: .55rem; }

.footer__link {
  display: inline-block;
  font-size: .9rem;
  color: rgba(245, 247, 244, .74);
  transition: color .18s ease, transform .18s ease;
}

.footer__link:hover {
  color: var(--whistle-300);
  transform: translateX(3px);
}

.footer__contact {
  display: grid;
  gap: .85rem;
}

.footer__contact-row { display: grid; gap: .1rem; }

.footer__contact-label {
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .16em;
  color: rgba(245, 247, 244, .45);
}

.footer__contact-value {
  font-size: .88rem;
  line-height: 1.6;
  color: rgba(245, 247, 244, .9);
  font-variant-numeric: tabular-nums;
  overflow-wrap: anywhere;
}

.footer__bottom {
  position: relative;
  border-top: 1px solid rgba(245, 247, 244, .12);
  background: rgba(6, 15, 22, .5);
}

.footer__bottom-inner {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: .4rem 1.5rem;
  padding-block: 1.15rem;
  padding-right: 9rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .06em;
  color: rgba(245, 247, 244, .55);
}

.footer__icp,
.footer__copy { font-variant-numeric: tabular-nums; }

.footer__uptop {
  position: absolute;
  top: 50%;
  right: 0;
  transform: translateY(-50%);
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .3rem .6rem;
  border: 1px solid rgba(201, 222, 46, .4);
  border-radius: 2px;
  color: var(--whistle-600);
  transition: background-color .18s ease, color .18s ease, border-color .18s ease;
}

.footer__uptop:hover {
  background: var(--whistle-300);
  border-color: var(--whistle-300);
  color: var(--ink-900);
}

/* ---------- 9. 页脚响应式 ---------- */
@media (max-width: 1024px) {
  .footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 720px) {
  .footer__bottom-inner {
    flex-direction: column;
    padding-right: 0;
    text-align: center;
  }

  .footer__uptop {
    position: static;
    transform: none;
  }
}

@media (max-width: 600px) {
  .footer__grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

/* ---------- 10. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .82rem 1.5rem;
  border: 1px solid transparent;
  border-radius: 2px;
  font-family: var(--font-body);
  font-size: .92rem;
  font-weight: 600;
  letter-spacing: .03em;
  line-height: 1.4;
  cursor: pointer;
  transition: transform .18s ease, background-color .18s ease, color .18s ease, border-color .18s ease;
}

.btn--primary {
  background: var(--pitch-600);
  color: #fff;
}

.btn--primary:hover {
  background: var(--green-400);
  transform: translate(-2px, -2px);
}

.btn--whistle {
  background: var(--whistle-300);
  color: var(--ink-900);
}

.btn--whistle:hover {
  background: var(--whistle-600);
  transform: translate(-2px, -2px);
}

.btn--ghost {
  background: transparent;
  color: var(--text-900);
  border-color: var(--line-300);
}

.btn--ghost:hover {
  border-color: var(--pitch-600);
  color: var(--pitch-600);
}

.btn--on-ink {
  background: transparent;
  color: var(--on-ink);
  border-color: rgba(245, 247, 244, .38);
}

.btn--on-ink:hover {
  border-color: var(--whistle-300);
  color: var(--whistle-300);
  transform: translate(-2px, -2px);
}

/* ---------- 11. 面包屑 ---------- */
.breadcrumb {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .06em;
  color: var(--text-600);
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .45rem;
}

.breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
}

.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: var(--line-300);
}

.breadcrumb__item a:hover { color: var(--pitch-600); }

.breadcrumb--on-ink { color: var(--on-ink-faint); }
.breadcrumb--on-ink .breadcrumb__item + .breadcrumb__item::before { color: rgba(245, 247, 244, .22); }
.breadcrumb--on-ink .breadcrumb__item a:hover { color: var(--whistle-300); }

/* ---------- 12. 正文容器 ---------- */
.prose {
  max-width: 68ch;
  font-size: 1.02rem;
  line-height: 1.8;
  color: var(--text-900);
}

.prose > * + * { margin-top: 1.1em; }

.prose h2 {
  font-size: clamp(1.35rem, 2.2vw, 1.7rem);
  letter-spacing: -.015em;
  margin-top: 2em;
}

.prose h3 {
  font-size: 1.12rem;
  margin-top: 1.6em;
}

.prose p,
.prose li { color: var(--text-600); }

.prose ul,
.prose ol { padding-left: 1.2em; display: grid; gap: .45em; }

.prose ul li { list-style: none; position: relative; padding-left: 1em; }

.prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .78em;
  width: 8px;
  height: 1px;
  background: var(--pitch-600);
}

.prose a {
  color: var(--pitch-600);
  border-bottom: 1px solid currentColor;
}

.prose strong { color: var(--text-900); }

/* ---------- 13. 网格 ---------- */
.grid {
  display: grid;
  gap: clamp(1rem, 2.4vw, 1.85rem);
}

.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid--split { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }
.grid--split-rev { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }

@media (max-width: 900px) {
  .grid--3,
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--split,
  .grid--split-rev { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 640px) {
  .grid--2,
  .grid--3,
  .grid--4 { grid-template-columns: minmax(0, 1fr); }
}

/* ---------- 14. 区块与说明牌标签 ---------- */
.section { padding-block: clamp(2.5rem, 6vw, 5rem); }

.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .6rem 1rem;
  margin-bottom: clamp(1.25rem, 3vw, 2rem);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  font-family: var(--font-mono);
  font-size: .7rem;
  font-weight: 500;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--pitch-600);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: currentColor;
}

.section-num {
  font-family: var(--font-mono);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .1em;
  font-variant-numeric: tabular-nums;
  color: var(--whistle-600);
}

/* ---------- 15. 图片容器 ---------- */
.figure {
  display: grid;
  gap: .6rem;
  margin: 0;
}

.figure__frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid rgba(11, 26, 38, .14);
  background:
    linear-gradient(135deg, rgba(22, 121, 76, .28) 0%, rgba(18, 41, 58, .92) 62%, rgba(11, 26, 38, 1) 100%);
}

.figure__frame > img,
.figure__frame > svg,
.figure__frame > .figure__ph {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.figure__ph {
  display: grid;
  place-items: center;
  padding: 1rem;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .18em;
  color: rgba(245, 247, 244, .45);
  border: 1px dashed rgba(233, 255, 90, .3);
}

.ratio-16x9 { aspect-ratio: 16 / 9; }
.ratio-4x3 { aspect-ratio: 4 / 3; }
.ratio-1x1 { aspect-ratio: 1 / 1; }
.ratio-3x4 { aspect-ratio: 3 / 4; }

.figure__caption {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .08em;
  color: var(--text-600);
}

.figure__caption::before {
  content: "";
  flex: 0 0 auto;
  width: 14px;
  height: 1px;
  background: var(--line-300);
}

/* ---------- 16. 标签与语义状态 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .18rem .55rem;
  border: 1px solid var(--line-300);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .1em;
  color: var(--text-600);
  white-space: nowrap;
}

.status-pin {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .18rem .55rem;
  border: 1px solid currentColor;
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .1em;
  white-space: nowrap;
}

.status-pin--ok { color: #1B7A4E; }
.status-pin--warn { color: #9A6C13; }
.status-pin--alert { color: var(--card-500); }

/* ---------- 17. 可展开内容组 ---------- */
.disclosure { border-top: 1px solid var(--line-300); }
.disclosure:last-of-type { border-bottom: 1px solid var(--line-300); }

.disclosure__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  width: 100%;
  padding: 1.1rem 0;
  text-align: left;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.6;
  color: var(--text-900);
  cursor: pointer;
  transition: color .18s ease;
}

.disclosure__trigger:hover { color: var(--pitch-600); }

.disclosure__icon {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 1.6rem;
  height: 1.6rem;
  border: 1px solid var(--line-300);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: .85rem;
  line-height: 1;
  transition: transform .24s ease, background-color .24s ease, border-color .24s ease, color .24s ease;
}

.disclosure[data-open="true"] .disclosure__icon {
  background: var(--pitch-600);
  border-color: var(--pitch-600);
  color: #fff;
  transform: rotate(45deg);
}

.disclosure__panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows .26s ease;
}

.disclosure[data-open="true"] .disclosure__panel { grid-template-rows: 1fr; }

.disclosure__inner { overflow: hidden; }

.disclosure__inner > * {
  margin-bottom: .9rem;
  font-size: .95rem;
  line-height: 1.8;
  color: var(--text-600);
}

.disclosure__inner > *:last-child { margin-bottom: 1.2rem; }

/* ---------- 18. 焦点与减少动效 ---------- */
:where(a, button, summary, [tabindex]):focus-visible {
  outline: 2px solid var(--pitch-600);
  outline-offset: 3px;
  border-radius: 2px;
}

.masthead :where(a, button):focus-visible,
.site-nav :where(a, button):focus-visible,
.site-footer :where(a, button):focus-visible,
.nav-toggle:focus-visible {
  outline-color: var(--whistle-300);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }

  html { scroll-behavior: auto; }
}