/* ============================================================
   星空赛场 · 共享样式 /assets/site.css
   深空蓝黑底 + 星图网格框架 + 等宽数字仪表
   ============================================================ */

/* ---------- 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, li { padding: 0; list-style: none; }
img, picture, svg, video { display: block; max-width: 100%; }
button { background: none; border: 0; padding: 0; cursor: pointer; font: inherit; color: inherit; }
input, select, textarea { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; border-spacing: 0; width: 100%; }
hr { border: 0; }
:focus-visible { outline: 2px solid var(--sk-cyan); outline-offset: 2px; box-shadow: inset 0 0 0 2px rgba(5, 7, 15, .9); }

/* ---------- 2. 变量 ---------- */
:root {
  --sk-deep: #05070F;
  --sk-deck: #0A0F1F;
  --sk-panel: #141B33;
  --sk-line: #2A3357;
  --sk-line-soft: rgba(42, 51, 87, .55);
  --sk-grid: rgba(42, 51, 87, .34);
  --sk-purple: #6E4BFF;
  --sk-purple-soft: rgba(110, 75, 255, .22);
  --sk-cyan: #2FD8E4;
  --sk-cyan-soft: rgba(47, 216, 228, .12);
  --sk-orange: #FF8A3D;
  --sk-white: #E9EEFB;
  --sk-mute: #93A0C8;
  --sk-max: #FFFFFF;
  --sk-frame-h: 64px;
  --sk-rail-w: 56px;
  --sk-gutter: clamp(18px, 3.2vw, 64px);
  --sk-wrap: 1160px;
  --sk-frame-wrap: 1560px;
  --sk-ease: cubic-bezier(.32, .72, 0, 1);
  --sk-t: .18s var(--sk-ease);
  --sk-font-head: "Barlow Condensed", "Oswald", "PingFang SC", "Source Han Sans SC", "Microsoft YaHei", sans-serif;
  --sk-font-body: "Noto Sans SC", "PingFang SC", "Source Han Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --sk-font-mono: "JetBrains Mono", "IBM Plex Mono", "SFMono-Regular", Menlo, Consolas, monospace;
}

/* ---------- 3. 基底与网格背景 ---------- */
body {
  min-height: 100vh;
  background-color: var(--sk-deep);
  color: var(--sk-white);
  font-family: var(--sk-font-body);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  background-image:
    radial-gradient(1200px 620px at 82% -8%, rgba(110, 75, 255, .24), rgba(5, 7, 15, 0) 60%),
    radial-gradient(900px 520px at -6% 10%, rgba(47, 216, 228, .10), rgba(5, 7, 15, 0) 58%),
    linear-gradient(to right, var(--sk-grid) 1px, transparent 1px),
    linear-gradient(to bottom, var(--sk-grid) 1px, transparent 1px);
  background-repeat: no-repeat, no-repeat, repeat, repeat;
  background-size: auto, auto, 96px 100%, 100% 96px;
  background-attachment: fixed, fixed, scroll, scroll;
}
::selection { background: var(--sk-purple); color: var(--sk-max); }

/* ---------- 4. 排版 ---------- */
h1, h2, h3, h4 {
  font-family: var(--sk-font-head);
  color: var(--sk-max);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -.012em;
}
.sk-h1 { font-size: clamp(34px, 5.2vw, 64px); }
.sk-h2 { font-size: clamp(26px, 3.4vw, 42px); }
.sk-h3 { font-size: clamp(19px, 1.7vw, 24px); font-weight: 600; line-height: 1.32; }
p { font-size: 16px; }
.sk-lede { font-size: clamp(16px, 1.3vw, 18px); line-height: 1.8; color: var(--sk-mute); max-width: 38em; }
.sk-prose { max-width: 38em; }
.sk-prose p { color: rgba(233, 238, 251, .86); }
.sk-prose p + p { margin-top: 1em; }
.sk-prose strong { color: var(--sk-max); font-weight: 600; }
.sk-prose a { color: var(--sk-cyan); border-bottom: 1px solid rgba(47, 216, 228, .4); }
.sk-num, .sk-mono { font-family: var(--sk-font-mono); font-variant-numeric: tabular-nums; font-feature-settings: "tnum" 1; letter-spacing: 0; }
.sk-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--sk-font-mono); font-size: 12px; line-height: 1.6;
  letter-spacing: .08em; text-transform: uppercase; color: var(--sk-cyan);
}
.sk-mark { position: relative; flex: none; width: 14px; height: 14px; border: 1px solid rgba(47, 216, 228, .75); }
.sk-mark::before, .sk-mark::after { content: ""; position: absolute; background: rgba(47, 216, 228, .7); }
.sk-mark::before { left: 50%; top: -5px; bottom: -5px; width: 1px; transform: translateX(-50%); }
.sk-mark::after { top: 50%; left: -5px; right: -5px; height: 1px; transform: translateY(-50%); }

/* ---------- 5. 布局容器 ---------- */
.sk-wrap { width: 100%; max-width: var(--sk-wrap); margin-inline: auto; padding-inline: var(--sk-gutter); }
.sk-main { display: block; }
.sk-section { position: relative; padding-block: clamp(56px, 7vw, 104px); scroll-margin-top: calc(var(--sk-frame-h) + 16px); }
.sk-section--tight { padding-block: clamp(32px, 4vw, 56px); }
.sk-section__head { display: flex; align-items: flex-start; gap: 14px; margin-bottom: clamp(20px, 2.6vw, 36px); }
.sk-section__head .sk-mark { margin-top: 9px; }
.sk-rule { height: 1px; background: var(--sk-line-soft); margin-block: clamp(24px, 3.2vw, 56px); }
.sk-stack { display: flex; flex-direction: column; gap: clamp(12px, 1.6vw, 22px); }
.sk-row { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
.sk-visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }

.sk-grid { display: grid; gap: clamp(16px, 2vw, 28px); }
.sk-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.sk-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.sk-grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.sk-grid--split { grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); }
@media (max-width: 1024px) {
  .sk-grid--3, .sk-grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sk-grid--split { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 640px) {
  .sk-grid--2, .sk-grid--3, .sk-grid--4 { grid-template-columns: minmax(0, 1fr); }
  body { font-size: 15px; }
}

/* ---------- 6. 跳转链接 ---------- */
.sk-skip {
  position: absolute; left: 12px; top: -72px; z-index: 100;
  padding: 10px 18px; background: var(--sk-purple); color: var(--sk-max);
  font-size: 14px; letter-spacing: .04em; transition: top var(--sk-t);
}
.sk-skip:focus { top: 12px; }

/* ---------- 7. 顶部坐标条 ---------- */
.sk-frame-top {
  position: sticky; top: 0; z-index: 60;
  background: rgba(5, 7, 15, .88);
  -webkit-backdrop-filter: blur(12px) saturate(150%);
  backdrop-filter: blur(12px) saturate(150%);
  border-bottom: 1px solid var(--sk-line);
}
.sk-topbar {
  position: relative;
  display: flex; flex-wrap: nowrap; align-items: center;
  gap: clamp(10px, 1.8vw, 26px);
  min-height: var(--sk-frame-h);
  max-width: var(--sk-frame-wrap);
  margin-inline: auto;
  padding-inline: var(--sk-gutter);
}
.sk-topbar__progress {
  position: absolute; left: 0; bottom: -1px; height: 2px; width: 0;
  background: linear-gradient(90deg, var(--sk-purple), var(--sk-cyan));
  pointer-events: none;
}

/* 品牌 */
.sk-brand { display: flex; align-items: center; gap: 12px; margin-right: auto; padding: 6px 0; transition: opacity var(--sk-t); }
.sk-brand:hover { opacity: .85; }
.sk-brand__mark { position: relative; flex: none; width: 18px; height: 18px; border: 1px solid rgba(47, 216, 228, .6); }
.sk-brand__mark::before, .sk-brand__mark::after { content: ""; position: absolute; background: var(--sk-cyan); }
.sk-brand__mark::before { left: 50%; top: -5px; bottom: -5px; width: 1px; transform: translateX(-50%); }
.sk-brand__mark::after { top: 50%; left: -5px; right: -5px; height: 1px; transform: translateY(-50%); }
.sk-brand__text { display: flex; flex-direction: column; line-height: 1.15; }
.sk-brand__name { font-family: var(--sk-font-head); font-size: 19px; font-weight: 800; letter-spacing: .06em; color: var(--sk-max); }
.sk-brand__sub { font-size: 11px; color: var(--sk-mute); letter-spacing: .04em; }

/* 当前节次指示 */
.sk-topbar__section {
  display: flex; align-items: center; gap: 8px;
  padding-right: clamp(8px, 1.4vw, 18px);
  border-right: 1px solid var(--sk-line-soft);
  font-family: var(--sk-font-mono); font-size: 12px; letter-spacing: .08em;
}
.sk-topbar__no { color: var(--sk-cyan); }
.sk-topbar__name { color: var(--sk-white); letter-spacing: .02em; }

/* 导航 */
.sk-nav { display: block; }
.sk-nav__list { display: flex; align-items: center; gap: clamp(8px, 1.6vw, 26px); }
.sk-nav__link {
  position: relative; display: block; padding: 6px 2px;
  font-size: 14px; line-height: 1.4; color: var(--sk-mute); white-space: nowrap;
  transition: color var(--sk-t);
}
.sk-nav__link::after {
  content: ""; position: absolute; left: 0; bottom: 0; width: 0; height: 2px;
  background: var(--sk-purple); transition: width var(--sk-t);
}
.sk-nav__link:hover { color: var(--sk-max); }
.sk-nav__link:hover::after { width: 100%; }
.sk-nav__link[aria-current="page"] { color: var(--sk-max); }
.sk-nav__link[aria-current="page"]::after { width: 100%; background: var(--sk-purple); }

/* 短入口 */
.sk-topbar__meta { display: flex; align-items: center; gap: 10px; }
.sk-lang {
  padding: 4px 8px; border: 1px solid var(--sk-line-soft);
  font-family: var(--sk-font-mono); font-size: 11px; letter-spacing: .08em; color: var(--sk-mute);
}
.sk-cta {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 14px; font-size: 13px; letter-spacing: .02em;
  border: 1px solid var(--sk-line); background: var(--sk-deck); color: var(--sk-white);
  transition: transform var(--sk-t), border-color var(--sk-t), background-color var(--sk-t), color var(--sk-t);
}
.sk-cta:hover { transform: translateY(-2px); border-color: var(--sk-cyan); }
.sk-cta--ghost { background: transparent; border-color: rgba(47, 216, 228, .45); color: var(--sk-cyan); }
.sk-cta--ghost:hover { color: var(--sk-max); border-color: var(--sk-cyan); background: var(--sk-cyan-soft); }
.sk-cta--primary { background: var(--sk-purple); border-color: var(--sk-purple); color: var(--sk-max); font-weight: 600; }
.sk-cta--primary:hover { background: #7d5eff; border-color: var(--sk-cyan); }

/* 移动导航按钮 */
.sk-nav-toggle {
  display: none; align-items: center; gap: 8px;
  padding: 8px 10px; border: 1px solid var(--sk-line); color: var(--sk-white);
  font-size: 12px; letter-spacing: .04em;
  transition: border-color var(--sk-t), background-color var(--sk-t);
}
.sk-nav-toggle:hover { border-color: var(--sk-cyan); }
.sk-nav-toggle__lines { display: flex; flex-direction: column; justify-content: space-between; width: 16px; height: 12px; }
.sk-nav-toggle__lines span { display: block; height: 1px; width: 100%; background: var(--sk-cyan); transition: transform var(--sk-t), opacity var(--sk-t); }
.sk-nav-toggle[aria-expanded="true"] .sk-nav-toggle__lines span:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
.sk-nav-toggle[aria-expanded="true"] .sk-nav-toggle__lines span:nth-child(2) { opacity: 0; }
.sk-nav-toggle[aria-expanded="true"] .sk-nav-toggle__lines span:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }

@media (max-width: 1199px) {
  .sk-lang { display: none; }
  .sk-topbar__section { display: none; }
}
@media (max-width: 979px) {
  .sk-cta--ghost { display: none; }
  .sk-nav-toggle { display: inline-flex; }
  .sk-nav {
    position: absolute; left: 0; right: 0; top: 100%; display: none;
    background: var(--sk-deck);
    border-top: 1px solid var(--sk-line);
    border-bottom: 1px solid var(--sk-line);
    padding: 8px var(--sk-gutter) 20px;
    max-height: calc(100vh - var(--sk-frame-h));
    overflow-y: auto;
    box-shadow: 0 24px 48px rgba(0, 0, 0, .5);
  }
  .sk-nav[data-open] { display: block; }
  .sk-nav__list { flex-direction: column; align-items: stretch; gap: 0; }
  .sk-nav__item { border-bottom: 1px solid var(--sk-line-soft); }
  .sk-nav__item:last-child { border-bottom: 0; }
  .sk-nav__link { padding: 15px 2px; font-size: 16px; }
}
@media (max-width: 560px) {
  :root { --sk-frame-h: 58px; }
  .sk-brand__sub { display: none; }
  .sk-brand__name { font-size: 17px; }
}
@media (max-width: 420px) {
  .sk-cta--primary { padding: 7px 10px; font-size: 12px; }
  .sk-nav-toggle__text { display: none; }
}

/* ---------- 8. 左侧纵向刻度 ---------- */
.sk-rail {
  position: fixed; left: 0; top: var(--sk-frame-h); bottom: 0; width: var(--sk-rail-w); z-index: 45;
  display: none;
  border-right: 1px solid var(--sk-line-soft);
  background: linear-gradient(180deg, rgba(10, 15, 31, .75), rgba(5, 7, 15, .22));
  pointer-events: none;
}
@media (min-width: 1320px) { .sk-rail { display: block; } }
.sk-rail__track { position: absolute; left: 50%; top: 0; bottom: 0; width: 1px; margin-left: -.5px; background: var(--sk-line-soft); }
.sk-rail__fill { position: absolute; left: 0; top: 0; width: 1px; height: 0; background: linear-gradient(180deg, var(--sk-purple), var(--sk-cyan)); }
.sk-rail__ticks {
  position: absolute; left: 0; right: 0; top: 36px; bottom: 36px;
  display: flex; flex-direction: column; justify-content: space-between; align-items: center;
}
.sk-rail__tick {
  display: flex; align-items: center; gap: 6px;
  font-family: var(--sk-font-mono); font-size: 10px; letter-spacing: .06em;
  color: var(--sk-mute); opacity: .62;
  transition: color var(--sk-t), opacity var(--sk-t);
}
.sk-rail__tick::before { content: ""; width: 8px; height: 1px; background: var(--sk-line); transition: width var(--sk-t), background-color var(--sk-t); }
.sk-rail__tick[data-active="true"] { color: var(--sk-purple); opacity: 1; }
.sk-rail__tick[data-active="true"]::before { width: 16px; background: var(--sk-purple); }
.sk-rail__no { font-family: inherit; }

/* ---------- 9. 页脚 ---------- */
.sk-frame-bottom {
  position: relative;
  margin-top: clamp(48px, 7vw, 110px);
  border-top: 1px solid var(--sk-line);
  background: linear-gradient(180deg, rgba(10, 15, 31, .9), var(--sk-deep));
}
.sk-foot {
  display: grid; grid-template-columns: minmax(240px, 1.5fr) repeat(3, minmax(130px, 1fr));
  gap: clamp(24px, 3vw, 52px);
  max-width: var(--sk-frame-wrap); margin-inline: auto;
  padding: clamp(36px, 4.4vw, 72px) var(--sk-gutter) clamp(20px, 2.4vw, 32px);
}
.sk-foot__brand { display: flex; flex-direction: column; gap: 10px; }
.sk-foot__brand .sk-brand__mark { margin-bottom: 2px; }
.sk-foot__name { font-family: var(--sk-font-head); font-size: 22px; font-weight: 800; letter-spacing: .06em; color: var(--sk-max); }
.sk-foot__sub { font-size: 12px; color: var(--sk-mute); }
.sk-foot__icp { font-family: var(--sk-font-mono); font-size: 12px; color: var(--sk-mute); letter-spacing: .02em; }
.sk-foot__col { min-width: 0; }
.sk-foot__title {
  margin: 0 0 14px;
  font-family: var(--sk-font-mono); font-size: 12px; font-weight: 500;
  letter-spacing: .08em; text-transform: uppercase; color: var(--sk-cyan);
}
.sk-foot__list { display: flex; flex-direction: column; gap: 10px; }
.sk-foot__link { display: inline-block; font-size: 13.5px; color: var(--sk-mute); transition: color var(--sk-t), transform var(--sk-t); }
.sk-foot__link:hover { color: var(--sk-max); transform: translateX(2px); }
.sk-foot__band {
  display: flex; flex-wrap: wrap; align-items: center; gap: 12px 34px;
  max-width: var(--sk-frame-wrap); margin-inline: auto;
  padding: 18px var(--sk-gutter);
  border-top: 1px solid var(--sk-line-soft);
}
.sk-foot__item { display: flex; align-items: center; gap: 8px; font-size: 12px; }
.sk-foot__label { color: var(--sk-mute); letter-spacing: .04em; }
.sk-foot__value { font-size: 13px; color: var(--sk-white); }
.sk-foot__base {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px 24px;
  max-width: var(--sk-frame-wrap); margin-inline: auto;
  padding: 16px var(--sk-gutter) clamp(28px, 3vw, 40px);
  border-top: 1px solid var(--sk-line-soft);
  font-size: 12px; color: var(--sk-mute);
}
.sk-foot__copy { font-family: var(--sk-font-mono); font-size: 12px; letter-spacing: .02em; }
.sk-foot__legal { display: flex; flex-wrap: wrap; gap: 20px; }
.sk-foot__legal a { font-size: 12px; color: var(--sk-mute); transition: color var(--sk-t); }
.sk-foot__legal a:hover { color: var(--sk-cyan); }

@media (max-width: 1024px) { .sk-foot { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 600px) { .sk-foot { grid-template-columns: minmax(0, 1fr); } }

/* ---------- 10. 通用组件 ---------- */
.sk-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 20px; border: 1px solid var(--sk-line); background: var(--sk-deck);
  color: var(--sk-white); font-size: 14px; font-weight: 500; letter-spacing: .02em;
  transition: transform var(--sk-t), border-color var(--sk-t), background-color var(--sk-t), color var(--sk-t);
}
.sk-btn:hover { transform: translateY(-2px); border-color: var(--sk-cyan); color: var(--sk-max); }
.sk-btn--primary { background: var(--sk-purple); border-color: var(--sk-purple); color: var(--sk-max); font-weight: 600; }
.sk-btn--primary:hover { background: #7d5eff; border-color: var(--sk-cyan); }
.sk-btn--ghost { background: transparent; border-color: rgba(47, 216, 228, .5); color: var(--sk-cyan); }
.sk-btn--ghost:hover { background: var(--sk-cyan-soft); color: var(--sk-max); }
.sk-btn--orange { background: var(--sk-orange); border-color: var(--sk-orange); color: #1a0f04; font-weight: 600; }
.sk-btn--sm { padding: 7px 14px; font-size: 13px; }

.sk-panel {
  position: relative; padding: clamp(18px, 2.2vw, 30px);
  background: var(--sk-deck); border: 1px solid var(--sk-line);
  transition: transform var(--sk-t), border-color var(--sk-t), background-color var(--sk-t);
}
.sk-panel:hover { transform: translateY(-2px); border-color: rgba(47, 216, 228, .55); }
.sk-panel--panel { background: var(--sk-panel); }

.sk-tag {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 3px 9px; border: 1px solid var(--sk-line);
  font-family: var(--sk-font-mono); font-size: 12px; line-height: 1.6;
  letter-spacing: .04em; color: var(--sk-mute);
}
.sk-tag--cyan { color: var(--sk-cyan); border-color: rgba(47, 216, 228, .4); }
.sk-tag--purple { color: #b6a4ff; border-color: rgba(110, 75, 255, .5); }
.sk-tag--orange { color: var(--sk-orange); border-color: rgba(255, 138, 61, .45); }
.sk-dot { display: inline-block; width: 6px; height: 6px; background: var(--sk-cyan); }
.sk-dot--live { background: var(--sk-orange); animation: sk-pulse 2.4s var(--sk-ease) infinite; }
@keyframes sk-pulse {
  0% { box-shadow: 0 0 0 0 rgba(255, 138, 61, .5); }
  70% { box-shadow: 0 0 0 8px rgba(255, 138, 61, 0); }
  100% { box-shadow: 0 0 0 0 rgba(255, 138, 61, 0); }
}

.sk-table { font-size: 14px; }
.sk-table th {
  padding: 10px 12px; border-bottom: 1px solid var(--sk-line);
  font-family: var(--sk-font-mono); font-size: 12px; font-weight: 500;
  letter-spacing: .08em; text-transform: uppercase; color: var(--sk-mute);
  text-align: left; white-space: nowrap;
}
.sk-table td { padding: 12px; border-bottom: 1px solid var(--sk-line-soft); vertical-align: top; color: rgba(233, 238, 251, .88); }
.sk-table tbody tr { transition: background-color var(--sk-t); }
.sk-table tbody tr:hover { background: rgba(110, 75, 255, .09); }
.sk-table td[data-num], .sk-table th[data-num] { text-align: right; font-family: var(--sk-font-mono); font-variant-numeric: tabular-nums; }
.sk-table__scroll { overflow-x: auto; }

.sk-index { border-top: 1px solid var(--sk-line); }
.sk-index__item {
  display: flex; flex-wrap: wrap; align-items: baseline; gap: 8px 16px;
  padding: 14px 2px; border-bottom: 1px solid var(--sk-line-soft);
  transition: background-color var(--sk-t), border-color var(--sk-t);
}
.sk-index__item:hover { background: rgba(20, 27, 51, .7); border-color: rgba(47, 216, 228, .45); }
.sk-index__no { min-width: 2.6em; font-family: var(--sk-font-mono); font-size: 12px; color: var(--sk-cyan); }
.sk-index__label { font-weight: 500; color: var(--sk-white); }
.sk-index__meta { margin-left: auto; font-family: var(--sk-font-mono); font-size: 12px; color: var(--sk-mute); }

.sk-crumb { margin-top: clamp(18px, 2vw, 28px); }
.sk-crumb__list { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; font-family: var(--sk-font-mono); font-size: 12px; letter-spacing: .04em; color: var(--sk-mute); }
.sk-crumb__item { display: flex; align-items: center; gap: 8px; }
.sk-crumb__item + .sk-crumb__item::before { content: "/"; color: var(--sk-line); }
.sk-crumb__link { color: var(--sk-mute); transition: color var(--sk-t); }
.sk-crumb__link:hover { color: var(--sk-cyan); }
.sk-crumb__item[aria-current="page"] .sk-crumb__link { color: var(--sk-white); }

.sk-figure { position: relative; margin: 0; overflow: hidden; background: var(--sk-deck); border: 1px solid var(--sk-line); }
.sk-figure__media {
  position: relative; display: block; width: 100%; aspect-ratio: 16 / 9;
  background:
    linear-gradient(160deg, rgba(110, 75, 255, .20), rgba(5, 7, 15, .2) 55%, rgba(47, 216, 228, .10)),
    var(--sk-deep);
}
.sk-figure__media img { width: 100%; height: 100%; object-fit: cover; }
.sk-figure__media::after {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .5;
  background-image: linear-gradient(rgba(42, 51, 87, .4) 1px, transparent 1px), linear-gradient(90deg, rgba(42, 51, 87, .4) 1px, transparent 1px);
  background-size: 48px 48px;
}
.sk-figure--wide .sk-figure__media { aspect-ratio: 21 / 9; }
.sk-figure--tall .sk-figure__media { aspect-ratio: 4 / 5; }
.sk-figure--square .sk-figure__media { aspect-ratio: 1 / 1; }
.sk-figure__cap {
  display: flex; justify-content: space-between; gap: 12px;
  padding: 10px 14px; border-top: 1px solid var(--sk-line);
  font-family: var(--sk-font-mono); font-size: 12px; color: var(--sk-mute);
}
@media (max-width: 640px) { .sk-figure__media { aspect-ratio: 4 / 3; } }

.sk-copy {
  display: inline; padding: 0 0 1px; border-bottom: 1px dashed rgba(47, 216, 228, .5);
  font-family: var(--sk-font-mono); font-size: 12.5px; color: var(--sk-cyan);
  transition: color var(--sk-t), border-color var(--sk-t);
}
.sk-copy:hover { color: var(--sk-max); border-color: var(--sk-max); }

.sk-toast {
  position: fixed; left: 50%; bottom: 32px; z-index: 90;
  padding: 10px 16px; background: var(--sk-panel); border: 1px solid var(--sk-cyan);
  color: var(--sk-white); font-family: var(--sk-font-mono); font-size: 13px;
  opacity: 0; pointer-events: none; transform: translate(-50%, 10px);
  transition: opacity var(--sk-t), transform var(--sk-t);
}
.sk-toast[data-visible="true"] { opacity: 1; transform: translate(-50%, 0); }

/* ---------- 11. 动效克制 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .sk-panel:hover, .sk-btn:hover, .sk-cta:hover, .sk-foot__link:hover { transform: none; }
  .sk-toast { transform: translate(-50%, 0); }
}