/* ==========================================================================
   火狐体育 · 共享样式表  /assets/site.css
   深炭黑夜战底 + 奶油纸叠层面板 + 火狐橙印刷分色
   ========================================================================== */

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

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

body, h1, h2, h3, h4, h5, p, figure, blockquote, dl, dd, ul, ol { margin: 0; }
ul, ol { padding: 0; }
ul[class], ol[class], nav ul { list-style: none; }
img, svg { display: block; max-width: 100%; }
button { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; }

/* ---------- 2. 变量 ---------- */
:root {
  --fox: #F2610C;
  --fox-light: #FF8A3D;
  --ember: #D6402A;
  --char-900: #14100E;
  --char-800: #1E1917;
  --cream-100: #F6EFE3;
  --cream-200: #EFE4D2;
  --gray-400: #9A9AA0;
  --gray-600: #6B6B72;
  --cyan: #4BE0D2;
  --amber: #FFC24B;
  --ink: #2A1F1A;
  --ink-soft: #5A4B44;

  --line-dark: rgba(246, 239, 227, 0.14);
  --line-light: rgba(42, 31, 26, 0.20);

  --font-display: "Inter Tight", "HarmonyOS Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Source Han Sans SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", "Roboto Mono", ui-monospace, Menlo, Consolas, "Courier New", monospace;

  --wrap: 1280px;
  --header-h: 74px;
  --header-h-min: 56px;
  --pad-x: clamp(16px, 3.2vw, 32px);
  --radius: 2px;
  --dur: 180ms;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --shadow-panel: 0 18px 40px -28px rgba(0, 0, 0, 0.9);
}

/* ---------- 3. 基础与中文排版 ---------- */
body {
  min-height: 100vh;
  padding-top: var(--header-h);
  overflow-x: hidden;
  background-color: var(--char-900);
  background-image:
    radial-gradient(1100px 520px at 12% -8%, rgba(242, 97, 12, 0.20), transparent 62%),
    radial-gradient(760px 420px at 94% 3%, rgba(75, 224, 210, 0.08), transparent 60%);
  background-repeat: no-repeat;
  color: var(--cream-100);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.012em;
}
h1 { font-size: clamp(30px, 5.2vw, 60px); }
h2 { font-size: clamp(24px, 3.4vw, 40px); }
h3 { font-size: clamp(19px, 2.2vw, 24px); }
h4 { font-size: 17px; }

::selection { background: var(--fox); color: #fff; }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 1px;
}

.is-locked { overflow: hidden; }

/* ---------- 4. 通用容器与工具类 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--pad-x);
}
.wrap-narrow { max-width: 880px; }

.prose p { max-width: 38em; margin-bottom: 1.1em; }
.prose p:last-child { margin-bottom: 0; }
.prose h3 { margin: 1.6em 0 0.6em; }

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}
.num-xl {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(28px, 4.4vw, 56px);
  line-height: 1;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}
.muted { color: var(--gray-400); }

.grid { display: grid; gap: clamp(16px, 2.2vw, 28px); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-main { grid-template-columns: minmax(0, 7fr) minmax(0, 4fr); }

/* ---------- 5. 跳转链接 ---------- */
.skip-link {
  position: absolute;
  left: 12px;
  top: 8px;
  z-index: 130;
  transform: translateY(-180%);
  padding: 9px 14px;
  background: var(--cream-100);
  color: var(--char-900);
  font-size: 13px;
  font-weight: 700;
  border-radius: var(--radius);
  transition: transform var(--dur) var(--ease);
}
.skip-link:focus { transform: translateY(0); }

/* ---------- 6. 头部命令栏 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(20, 16, 14, 0.94);
  border-bottom: 1px solid var(--line-dark);
  color: var(--cream-100);
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.site-header::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--fox) 0 18%, var(--ember) 18% 30%, rgba(242, 97, 12, 0.22) 30% 100%);
  pointer-events: none;
}
.site-header[data-scrolled] {
  background: rgba(20, 16, 14, 0.985);
  box-shadow: 0 20px 44px -34px #000;
}

.header-inner {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.8vw, 24px);
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--pad-x);
  height: var(--header-h);
  transition: height 200ms var(--ease);
}
.site-header[data-scrolled] .header-inner { height: var(--header-h-min); }

/* 品牌 */
.brand {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 4px 2px;
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  flex: 0 0 auto;
  background: var(--fox);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  clip-path: polygon(0 0, 100% 0, 100% 76%, 76% 100%, 0 100%);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}
.brand:hover .brand-mark { background: var(--fox-light); transform: translateY(-2px); }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 800;
  letter-spacing: 0.01em;
}
.brand-ver {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  color: var(--gray-400);
  text-transform: uppercase;
}

/* 命令栏导航 */
.cmd-nav {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  justify-content: center;
}
.cmd-list {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  gap: 2px;
  margin: 0;
  padding: 0;
  overflow: hidden;
  list-style: none;
}
.cmd-link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 6px;
  padding: 8px 9px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--cream-100);
  border: 1px solid transparent;
  border-radius: var(--radius);
  white-space: nowrap;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}
.cmd-idx {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.04em;
  color: var(--gray-600);
  transition: color var(--dur) var(--ease);
}
.cmd-link:hover { background: var(--char-800); border-color: var(--line-dark); color: #fff; }
.cmd-link:hover .cmd-idx { color: var(--fox-light); }
.cmd-link[aria-current="page"] {
  background: var(--cream-100);
  border-color: var(--cream-100);
  color: var(--char-900);
}
.cmd-link[aria-current="page"] .cmd-idx { color: var(--fox); }
.cmd-link[aria-current="page"]::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 2px;
  background: var(--fox);
}

/* 头部右侧 */
.header-side {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 10px;
}
.sub-chip {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  background: var(--char-800);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.02em;
  color: var(--gray-400);
  white-space: nowrap;
}
.sub-chip-text { overflow: hidden; text-overflow: ellipsis; }
.status-dot {
  width: 8px;
  height: 8px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(75, 224, 210, 0.18);
  animation: status-pulse 2.6s ease-in-out infinite;
}
@keyframes status-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.55; transform: scale(0.86); }
}

/* 移动菜单按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  height: 40px;
  padding: 0 11px;
  background: var(--char-800);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  color: var(--cream-100);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.nav-toggle:hover { border-color: var(--fox); color: #fff; }
.nav-toggle-bars { display: grid; gap: 4px; width: 18px; }
.nav-toggle-bars span {
  display: block;
  height: 2px;
  background: currentColor;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* 阅读进度 */
.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  z-index: 3;
  height: 3px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--fox), var(--amber));
  pointer-events: none;
}

/* ---------- 7. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 18px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.2;
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease),
              border-color var(--dur) var(--ease), transform var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease);
}
.btn-primary {
  background: var(--fox);
  color: #fff;
  box-shadow: 0 10px 24px -16px rgba(242, 97, 12, 0.9);
}
.btn-primary:hover { background: var(--fox-light); transform: translateY(-2px); }
.btn-ghost {
  background: transparent;
  border-color: var(--line-dark);
  color: var(--cream-100);
}
.btn-ghost:hover { border-color: var(--fox); color: #fff; transform: translateY(-2px); }
.btn-ink { background: var(--ink); color: var(--cream-100); }
.btn-ink:hover { background: var(--ember); transform: translateY(-2px); }
.btn-sm { padding: 8px 14px; font-size: 13px; }
.btn-block { width: 100%; }

/* ---------- 8. 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 8px;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gray-400);
}
.tag-fox { background: var(--fox); border-color: var(--fox); color: #fff; }
.tag-ember { background: var(--ember); border-color: var(--ember); color: #fff; }
.tag-cyan {
  background: rgba(75, 224, 210, 0.08);
  border-color: rgba(75, 224, 210, 0.45);
  color: var(--cyan);
}
.tag-amber { border-color: rgba(255, 194, 75, 0.5); color: var(--amber); }

/* ---------- 9. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(40px, 7vw, 96px);
  background: linear-gradient(180deg, var(--char-900), #0d0a09);
  border-top: 1px solid var(--line-dark);
  color: var(--cream-100);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 0;
  width: min(340px, 46%);
  height: 3px;
  background: linear-gradient(90deg, var(--fox), var(--ember));
}
.footer-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.9fr) minmax(0, 1.3fr);
  gap: clamp(24px, 3.4vw, 56px);
  max-width: var(--wrap);
  margin: 0 auto;
  padding: clamp(32px, 5vw, 64px) var(--pad-x) clamp(24px, 3vw, 40px);
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.01em;
}
.footer-logo::before {
  content: "";
  width: 10px;
  height: 10px;
  flex: 0 0 auto;
  background: var(--fox);
  clip-path: polygon(0 0, 100% 0, 100% 70%, 70% 100%, 0 100%);
}
.footer-tagline {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gray-400);
}
.footer-note {
  margin-top: 14px;
  max-width: 34ch;
  font-size: 14px;
  line-height: 1.7;
  color: var(--gray-600);
}
.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 28px);
}
.footer-col-title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fox-light);
}
.footer-list { display: grid; gap: 10px; }
.footer-link {
  position: relative;
  display: inline-block;
  font-size: 14.5px;
  color: var(--cream-100);
  transition: color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.footer-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 1px;
  background: var(--cyan);
  transition: width var(--dur) var(--ease);
}
.footer-link:hover { color: var(--cyan); transform: translateX(2px); }
.footer-link:hover::after { width: 100%; }

.footer-contact { min-width: 0; }
.contact-list { display: grid; gap: 10px; }
.contact-line { display: flex; align-items: baseline; gap: 10px; }
.contact-label {
  flex: 0 0 auto;
  min-width: 44px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gray-600);
}
.contact-value {
  font-family: var(--font-mono);
  font-size: 13.5px;
  letter-spacing: 0.01em;
  color: var(--cream-100);
  word-break: break-word;
}
.contact-note {
  margin-top: 14px;
  max-width: 34ch;
  font-size: 13px;
  line-height: 1.7;
  color: var(--gray-600);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 18px var(--pad-x) 28px;
  border-top: 1px solid var(--line-dark);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--gray-600);
}
.legal-item { max-width: 62ch; }

/* ---------- 10. 章节与面板 ---------- */
.section {
  position: relative;
  padding: clamp(40px, 6vw, 80px) 0;
}
.section + .section { border-top: 1px solid var(--line-dark); }
.section-tight { padding: clamp(24px, 3.4vw, 44px) 0; }
.section-alt { background: rgba(30, 25, 23, 0.55); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fox-light);
}
.eyebrow::before { content: ""; width: 22px; height: 2px; background: var(--fox); }
.section-title {
  margin-top: 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 3.6vw, 44px);
  line-height: 1.08;
  letter-spacing: -0.015em;
}
.section-lead {
  max-width: 52ch;
  margin-top: 12px;
  font-size: 16px;
  color: var(--gray-400);
}

.panel {
  position: relative;
  padding: clamp(20px, 2.6vw, 32px);
  background: var(--char-800);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  box-shadow: var(--shadow-panel);
}
.panel-paper {
  background: var(--cream-100);
  border-color: var(--line-light);
  color: var(--ink);
}
.panel-paper-alt {
  background: var(--cream-200);
  border-color: var(--line-light);
  color: var(--ink);
}
.panel-paper .section-title,
.panel-paper-alt .section-title { color: var(--ink); }
.panel-paper .section-lead,
.panel-paper-alt .section-lead,
.panel-paper .muted,
.panel-paper-alt .muted { color: var(--ink-soft); }
.panel-paper .eyebrow,
.panel-paper-alt .eyebrow { color: var(--ember); }
.panel-paper .eyebrow::before,
.panel-paper-alt .eyebrow::before { background: var(--ember); }
.panel-paper .tag,
.panel-paper-alt .tag { color: var(--ink-soft); border-color: var(--line-light); }
.panel-paper .btn-ghost,
.panel-paper-alt .btn-ghost { color: var(--ink); border-color: var(--line-light); }
.panel-paper .btn-ghost:hover,
.panel-paper-alt .btn-ghost:hover { color: #fff; border-color: var(--fox); background: var(--fox); }

.panel-tag {
  position: absolute;
  top: -1px;
  left: -1px;
  padding: 5px 10px;
  background: var(--ember);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.panel-lift {
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease);
}
.panel-lift:hover {
  transform: translateY(-4px);
  border-color: rgba(242, 97, 12, 0.55);
  box-shadow: 0 26px 46px -30px rgba(0, 0, 0, 0.95);
}

/* 横向主题带 */
.band {
  padding: 12px 0;
  background: var(--fox);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.band-dark {
  background: var(--char-800);
  border-top: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
  color: var(--cream-100);
}
.band-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 28px;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--pad-x);
}

/* ---------- 11. 面包屑 ---------- */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 16px 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--gray-600);
}
.crumbs li { display: flex; align-items: center; gap: 8px; }
.crumbs li + li::before { content: "/"; color: var(--gray-600); }
.crumbs a { color: var(--gray-400); transition: color var(--dur) var(--ease); }
.crumbs a:hover { color: var(--cyan); }
.crumbs [aria-current="page"] { color: var(--cream-100); }

/* ---------- 12. 数据表 ---------- */
.data-table {
  width: 100%;
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}
.data-table th,
.data-table td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--line-dark);
  vertical-align: middle;
}
.data-table thead th {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gray-400);
}
.data-table tbody tr:nth-child(even) { background: rgba(246, 239, 227, 0.03); }
.data-table .num {
  font-family: var(--font-mono);
  text-align: right;
  font-variant-numeric: tabular-nums;
}
.panel-paper .data-table th,
.panel-paper .data-table td,
.panel-paper-alt .data-table th,
.panel-paper-alt .data-table td { border-color: var(--line-light); }
.panel-paper .data-table thead th,
.panel-paper-alt .data-table thead th { color: var(--ink-soft); }
.panel-paper .data-table tbody tr:nth-child(even),
.panel-paper-alt .data-table tbody tr:nth-child(even) { background: rgba(42, 31, 26, 0.045); }

/* ---------- 13. 折叠与标签页 ---------- */
.fold {
  background: var(--char-800);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
}
.fold + .fold { margin-top: -1px; }
.fold-head {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 14px 18px;
  background: none;
  border: 0;
  text-align: left;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--dur) var(--ease);
}
.fold-head:hover { background: rgba(246, 239, 227, 0.04); }
.fold-head::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  color: var(--fox-light);
}
.fold[data-open] .fold-head::after { content: "\2013"; }
.fold-body {
  display: none;
  padding: 0 18px 16px;
  font-size: 15px;
  color: var(--gray-400);
}
.fold[data-open] .fold-body { display: block; }

.tablist {
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
  border-bottom: 1px solid var(--line-dark);
}
.tab {
  padding: 10px 14px;
  background: none;
  border: 1px solid transparent;
  border-bottom: 0;
  border-radius: var(--radius) var(--radius) 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--gray-400);
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.tab:hover { color: var(--cream-100); background: rgba(246, 239, 227, 0.05); }
.tab[aria-selected="true"] { background: var(--cream-100); color: var(--char-900); }

/* ---------- 14. 图片容器 ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  background: linear-gradient(160deg, var(--char-800), #0c0a09);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
}
.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(20, 16, 14, 0) 42%, rgba(20, 16, 14, 0.72));
  pointer-events: none;
}
.ratio-16x9 { aspect-ratio: 16 / 9; }
.ratio-4x3 { aspect-ratio: 4 / 3; }
.ratio-3x2 { aspect-ratio: 3 / 2; }
.ratio-1x1 { aspect-ratio: 1 / 1; }
.media-caption {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--gray-600);
}

/* ---------- 15. 显现动效 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 420ms var(--ease), transform 420ms var(--ease);
}
[data-reveal].is-visible { opacity: 1; transform: none; }

/* ---------- 16. 响应式 ---------- */
@media (max-width: 1399px) {
  .sub-chip { padding: 7px; }
  .sub-chip-text {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
  }
}

@media (max-width: 1139px) {
  .sub-chip { display: none; }
}

@media (max-width: 1024px) {
  .footer-inner { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 979px) {
  :root { --header-h: 64px; }
  .cmd-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    z-index: 99;
    display: none;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    padding: 6px var(--pad-x) 22px;
    background: var(--char-900);
    border-bottom: 1px solid var(--line-dark);
    box-shadow: 0 34px 60px -34px #000;
  }
  .site-header[data-scrolled] .cmd-nav { top: var(--header-h-min); }
  .cmd-nav[data-open] { display: block; }
  .cmd-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    overflow: visible;
  }
  .cmd-item { border-bottom: 1px solid var(--line-dark); }
  .cmd-link {
    gap: 12px;
    padding: 15px 8px;
    font-size: 16px;
    border: 0;
    border-radius: 0;
  }
  .cmd-link::after {
    content: "\2192";
    margin-left: auto;
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--gray-600);
  }
  .cmd-link[aria-current="page"] {
    background: rgba(242, 97, 12, 0.14);
    color: var(--cream-100);
  }
  .cmd-link[aria-current="page"]::before {
    top: 0;
    bottom: 0;
    right: auto;
    left: 0;
    width: 3px;
    height: auto;
  }
  .nav-toggle { display: inline-flex; }
}

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

@media (max-width: 640px) {
  .brand-ver { display: none; }
  .footer-inner { grid-template-columns: minmax(0, 1fr); }
  .footer-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-legal { font-size: 11px; }
  .contact-line { flex-wrap: wrap; gap: 2px 10px; }
}

@media (max-width: 420px) {
  .nav-toggle-text { display: none; }
  .nav-toggle { padding: 0 10px; }
  .footer-cols { grid-template-columns: minmax(0, 1fr); }
}

/* ---------- 17. 动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
}