/* ============================================================
   欢云赛场 /assets/site.css
   夜色球场：深夜底 → 深靛蓝 → 看台蓝 三档底色
   电光青只给实时数据与焦点；暖橙金只给重点场次与公告时间
   ============================================================ */

/* ---------- 1. reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body, h1, h2, h3, h4, h5, h6, p, ul, ol, figure, blockquote, dl, dd { margin: 0; }
ul[class], ol[class] { list-style: none; padding: 0; }
img, picture, svg, video { max-width: 100%; display: block; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: inherit; }
table { border-collapse: collapse; width: 100%; }

/* ---------- 2. 设计变量 ---------- */
:root {
  --c-night: #070D18;
  --c-indigo: #0E1A2E;
  --c-stand: #16263F;
  --c-cyan: #2FE3D0;
  --c-amber: #F5A623;
  --c-haze: #7C93B0;
  --c-lamp: #E8F0F8;
  --c-violet: #5B6BFF;
  --c-alert: #C2504F;

  --line: rgba(124, 147, 176, 0.22);
  --line-strong: rgba(124, 147, 176, 0.44);
  --tint-cyan: rgba(47, 227, 208, 0.12);
  --tint-amber: rgba(245, 166, 35, 0.10);
  --glow-cyan: 0 0 14px rgba(47, 227, 208, 0.5);
  --glow-amber: 0 0 14px rgba(245, 166, 35, 0.42);

  --font-display: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-serif: "Songti SC", "SimSun", "Noto Serif SC", Georgia, serif;
  --font-mono: "SFMono-Regular", Menlo, Consolas, "Roboto Mono", ui-monospace, monospace;

  --rail-w: 96px;
  --ease: cubic-bezier(.2, .6, .3, 1);
}
html[data-rail="collapsed"] { --rail-w: 60px; }

/* ---------- 3. 基础排版 ---------- */
body {
  background: var(--c-night);
  color: var(--c-lamp);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.8;
  min-height: 100vh;
  overflow-x: hidden;
}
main { display: block; background: var(--c-indigo); }
main [id] { scroll-margin-top: 92px; }

p { margin: 0 0 1em; }
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 700; line-height: 1.2; }
h1 { font-size: clamp(30px, 5.4vw, 54px); letter-spacing: 0.08em; }
h2 { font-size: clamp(22px, 3.2vw, 34px); letter-spacing: 0.06em; }
h3 { font-size: clamp(17px, 2vw, 21px); letter-spacing: 0.04em; }
strong { color: var(--c-lamp); }
::selection { background: var(--c-cyan); color: #04141a; }

:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 2px;
}
#main-content:focus-visible { outline-offset: 6px; }

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

/* ---------- 4. 布局容器与网格 ---------- */
.container { width: 100%; max-width: 1180px; margin: 0 auto; padding: 0 20px; }
.container--wide { max-width: 1320px; }
.container--narrow { max-width: 720px; }

.grid { display: grid; gap: 24px; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 680px) {
  .grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 1024px) {
  .grid { gap: 32px; }
  .grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid--split { grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr); }
}

.rule { border: 0; border-top: 1px solid var(--line); margin: 32px 0; }

.section-head {
  display: flex; flex-wrap: wrap; align-items: baseline; gap: 10px 18px;
  padding-bottom: 12px; margin-bottom: 22px;
  border-bottom: 1px solid var(--line);
}
.section-head__title { margin: 0; }
.section-head__meta {
  margin: 0 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12.5px; letter-spacing: 0.08em; color: var(--c-haze);
}

/* ---------- 5. 通用文本件 ---------- */
.eyebrow {
  font-size: 12px; letter-spacing: 0.3em; text-transform: uppercase;
  color: var(--c-cyan); margin: 0 0 10px;
}
.lede {
  font-family: var(--font-serif);
  font-size: clamp(18px, 2.2vw, 24px);
  line-height: 1.75; letter-spacing: 0.02em;
  color: var(--c-lamp); margin: 0 0 1em;
}
.prose { max-width: 68ch; }
.prose p { margin: 0 0 1.1em; }
.prose h3 { margin: 1.8em 0 0.6em; }
.note {
  font-size: 13px; line-height: 1.85; letter-spacing: 0.04em;
  color: var(--c-haze);
  border-left: 1px solid var(--line-strong);
  padding-left: 12px; margin: 0 0 1em;
}
.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
  letter-spacing: 0.02em;
  font-size: 1.2em;
}
.link-more {
  color: var(--c-cyan); text-decoration: none;
  border-bottom: 1px solid rgba(47, 227, 208, 0.4);
  transition: border-color 160ms var(--ease), color 160ms var(--ease);
}
.link-more:hover { color: var(--c-lamp); border-bottom-color: var(--c-lamp); }

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px; padding: 10px 18px;
  font-size: 14px; font-weight: 600; letter-spacing: 0.06em;
  text-decoration: none; text-align: center;
  border: 1px solid transparent; cursor: pointer;
  transition: background-color 160ms var(--ease), color 160ms var(--ease),
              border-color 160ms var(--ease), transform 160ms var(--ease),
              box-shadow 160ms var(--ease);
}
.btn--primary {
  background: var(--c-cyan); color: #04141a; border-color: var(--c-cyan);
}
.btn--primary:hover { background: #63f0e2; border-color: #63f0e2; transform: translateY(-2px); box-shadow: var(--glow-cyan); }
.btn--ghost {
  background: transparent; color: var(--c-lamp); border-color: var(--line-strong);
}
.btn--ghost:hover { color: var(--c-cyan); border-color: var(--c-cyan); transform: translateY(-2px); }

/* ---------- 7. 标签 ---------- */
.tag {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 3px 10px;
  font-size: 11.5px; letter-spacing: 0.16em; line-height: 1.6;
  border: 1px solid currentColor; color: var(--c-haze);
  white-space: nowrap;
}
.tag--live { color: var(--c-cyan); box-shadow: inset 0 0 12px rgba(47, 227, 208, 0.14); }
.tag--focus { color: var(--c-amber); }
.tag--alert { color: var(--c-alert); }

/* ---------- 8. 面板与叠层纸面 ---------- */
.panel {
  background: var(--c-stand);
  border: 1px solid var(--line);
  padding: 22px;
}
.panel--sheet {
  box-shadow: 6px 6px 0 rgba(7, 13, 24, 0.75);
  border-color: var(--line-strong);
}
.panel__title { margin: 0 0 10px; font-size: 17px; letter-spacing: 0.05em; }
.panel__body { color: var(--c-haze); font-size: 14.5px; }
.panel__body p:last-child { margin-bottom: 0; }

/* ---------- 9. 图片容器 ---------- */
.figure { margin: 0; display: grid; gap: 10px; }
.figure__media {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--line);
  background:
    linear-gradient(142deg, #16263F 0%, #0B1424 55%, #070D18 100%);
}
.figure__media > img,
.figure__media > picture,
.figure__media > picture > img {
  width: 100%; height: 100%; object-fit: cover; display: block;
}
.figure__media--wide { aspect-ratio: 21 / 9; }
.figure__media--portrait { aspect-ratio: 3 / 4; }
.figure__caption {
  font-size: 13px; line-height: 1.8; letter-spacing: 0.04em;
  color: var(--c-haze);
  border-left: 1px solid var(--line-strong);
  padding-left: 10px;
}

/* ---------- 10. 装饰光带 ---------- */
.beam {
  position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(120% 80% at 12% -12%, rgba(47, 227, 208, 0.14), transparent 62%),
    radial-gradient(90% 70% at 100% 0%, rgba(91, 107, 255, 0.13), transparent 66%);
}

/* ---------- 11. 面包屑 / 页头 / 索引 ---------- */
.crumbs { font-size: 12.5px; letter-spacing: 0.06em; color: var(--c-haze); }
.crumbs__list { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 0; padding: 0; list-style: none; }
.crumbs__link { color: var(--c-haze); text-decoration: none; transition: color 160ms var(--ease); }
.crumbs__link:hover { color: var(--c-cyan); }
.crumbs__sep { color: rgba(124, 147, 176, 0.5); }
.crumbs__current { color: var(--c-lamp); }

.page-head { padding: 44px 0 26px; border-bottom: 1px solid var(--line); }
.page-head__title {
  font-family: var(--font-display);
  font-size: clamp(28px, 5vw, 46px);
  line-height: 1.16; letter-spacing: 0.08em;
  margin: 10px 0 12px; color: var(--c-lamp);
}
.page-head__meta { color: var(--c-haze); font-size: 14.5px; max-width: 62ch; margin: 0; }

.toc { border-left: 2px solid var(--line); padding-left: 0; }
.toc__list { display: flex; flex-direction: column; gap: 4px; margin: 0; padding: 0; list-style: none; }
.toc__item { margin: 0; }
.toc__link {
  display: block; margin-left: -2px;
  padding: 7px 0 7px 14px;
  font-size: 14px; color: var(--c-haze); text-decoration: none;
  border-left: 2px solid transparent;
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}
.toc__link:hover { color: var(--c-lamp); }
.toc__link[aria-current="true"] { color: var(--c-cyan); border-left-color: var(--c-cyan); }

/* ---------- 12. 折叠面板 ---------- */
.disclosure {
  border: 1px solid var(--line);
  background: var(--c-stand);
}
.disclosure + .disclosure { margin-top: 12px; }
.disclosure__trigger {
  display: flex; align-items: center; gap: 12px; width: 100%;
  padding: 16px 18px;
  background: transparent; border: 0; text-align: left; cursor: pointer;
  font-size: 15.5px; font-weight: 600; letter-spacing: 0.04em;
  transition: color 160ms var(--ease), background-color 160ms var(--ease);
}
.disclosure__trigger::after {
  content: ""; margin-left: auto; flex: 0 0 auto;
  width: 8px; height: 8px;
  border-right: 2px solid currentColor; border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  transition: transform 180ms var(--ease);
}
.disclosure__trigger[aria-expanded="true"] { color: var(--c-cyan); background: var(--tint-cyan); }
.disclosure__trigger[aria-expanded="true"]::after { transform: rotate(-135deg); }
.disclosure__panel { padding: 4px 18px 20px; border-top: 1px solid var(--line); color: var(--c-haze); font-size: 14.5px; }
.disclosure__panel[hidden] { display: none; }

/* ---------- 13. 进场协议 ---------- */
[data-reveal] { transition: opacity 240ms var(--ease), transform 240ms var(--ease); }
html[data-js="on"] [data-reveal] { opacity: 0; transform: translateY(10px); }
html[data-js="on"] [data-reveal].is-visible { opacity: 1; transform: none; }

/* ---------- 14. 页头轨道 ---------- */
.skip-link {
  position: fixed; top: 10px; left: 10px; z-index: 200;
  padding: 10px 16px;
  background: var(--c-cyan); color: #04141a;
  font-size: 13px; font-weight: 700; letter-spacing: 0.06em;
  text-decoration: none;
  transform: translateY(-180%);
  transition: transform 160ms var(--ease);
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: sticky; top: 0; z-index: 90;
  background: var(--c-night);
}

/* 移动端顶栏 */
.topbar {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 16px;
  background: rgba(7, 13, 24, 0.96);
  border-bottom: 1px solid var(--line);
}
.topbar__brand {
  display: inline-flex; align-items: center; gap: 10px;
  text-decoration: none;
}
.topbar__name {
  font-family: var(--font-display);
  font-size: 16px; font-weight: 700; letter-spacing: 0.18em;
  color: var(--c-lamp);
}
.topbar__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px; letter-spacing: 0.08em; color: var(--c-haze);
}
.brand-mark {
  flex: 0 0 auto;
  width: 11px; height: 11px;
  background: var(--c-cyan);
  box-shadow: var(--glow-cyan);
  transform: rotate(45deg);
}

.nav-toggle {
  display: inline-flex; align-items: center; gap: 8px;
  margin-left: auto;
  padding: 8px 12px;
  background: transparent;
  border: 1px solid var(--line-strong);
  color: var(--c-lamp);
  font-size: 13px; letter-spacing: 0.1em;
  cursor: pointer;
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}
.nav-toggle:hover { border-color: var(--c-cyan); color: var(--c-cyan); }
.nav-toggle[aria-expanded="true"] { color: var(--c-cyan); border-color: var(--c-cyan); }
.nav-toggle__bars { display: inline-flex; flex-direction: column; gap: 4px; width: 16px; }
.nav-toggle__bar { display: block; height: 2px; background: currentColor; transition: transform 180ms var(--ease); }
.site-header[data-open] .nav-toggle__bar:first-child { transform: translateY(3px) rotate(45deg); }
.site-header[data-open] .nav-toggle__bar:last-child { transform: translateY(-3px) rotate(-45deg); }

/* 移动端抽屉 */
.rail {
  position: fixed; top: 0; left: 0; bottom: 0; z-index: 120;
  display: flex; flex-direction: column; gap: 20px;
  width: min(86vw, 320px);
  padding: 22px 20px 26px;
  background: var(--c-night);
  border-right: 1px solid var(--line);
  overflow-y: auto;
  transform: translateX(-102%);
  transition: transform 220ms var(--ease);
}
.site-header[data-open] .rail { transform: translateX(0); }

.rail__top { padding-bottom: 16px; border-bottom: 1px solid var(--line); }
.rail__brand {
  display: flex; align-items: center; gap: 12px;
  text-decoration: none;
}
.rail__name {
  font-family: var(--font-display);
  font-size: 20px; font-weight: 700; letter-spacing: 0.18em;
  color: var(--c-lamp);
}
.rail__tagline {
  margin: 10px 0 0;
  font-family: var(--font-serif);
  font-size: 13px; letter-spacing: 0.1em; color: var(--c-haze);
}

.rail__nav { flex: 1 1 auto; }
.rail__list { display: flex; flex-direction: column; gap: 2px; margin: 0; padding: 0; list-style: none; }
.rail__item { margin: 0; }
.rail__link {
  display: flex; align-items: center; gap: 10px;
  padding: 11px 10px;
  color: var(--c-haze); text-decoration: none;
  font-size: 15px; letter-spacing: 0.08em;
  border-left: 2px solid transparent;
  transition: color 160ms var(--ease), background-color 160ms var(--ease), border-color 160ms var(--ease);
}
.rail__link:hover { color: var(--c-lamp); background: rgba(91, 107, 255, 0.1); }
.rail__link[aria-current="page"] {
  color: var(--c-cyan);
  border-left-color: var(--c-cyan);
  background: linear-gradient(90deg, var(--tint-cyan), transparent 85%);
}
.rail__dot {
  flex: 0 0 auto; width: 5px; height: 5px;
  background: currentColor; opacity: 0.45;
}
.rail__link[aria-current="page"] .rail__dot { opacity: 1; box-shadow: var(--glow-cyan); }
.rail__text { display: inline; }

.rail__actions {
  display: flex; flex-direction: column; gap: 14px;
  padding-top: 16px; border-top: 1px solid var(--line);
}
.rail__cta { width: 100%; }
.rail__utility { display: flex; flex-wrap: wrap; gap: 8px 18px; margin: 0; padding: 0; list-style: none; }
.rail__utility-link {
  color: var(--c-haze); text-decoration: none; font-size: 13px; letter-spacing: 0.08em;
  transition: color 160ms var(--ease);
}
.rail__utility-link:hover { color: var(--c-amber); }
.rail__collapse { display: none; }

.scrim {
  position: fixed; inset: 0; z-index: 110;
  padding: 0; border: 0;
  background: rgba(4, 8, 14, 0.72);
  opacity: 0; visibility: hidden;
  transition: opacity 200ms var(--ease), visibility 200ms var(--ease);
}
.site-header[data-open] .scrim { opacity: 1; visibility: visible; }
body[data-scroll-lock] { overflow: hidden; }

/* 阅读进度 */
.progress-rail {
  position: fixed; top: 0; left: 0; z-index: 130;
  width: 100%; height: 2px;
  background: rgba(124, 147, 176, 0.16);
  pointer-events: none;
}
.progress-rail__bar {
  display: block; width: 100%; height: 100%;
  background: linear-gradient(90deg, var(--c-cyan), var(--c-violet) 55%, var(--c-amber));
  transform: scaleX(var(--p, 0));
  transform-origin: left center;
  transition: transform 120ms linear;
}

/* ---------- 15. 桌面端：左侧轨道导航 ---------- */
@media (min-width: 1024px) {
  body { padding-left: var(--rail-w); transition: padding-left 220ms var(--ease); }
  main [id] { scroll-margin-top: 40px; }

  .site-header {
    position: fixed; top: 0; left: 0; bottom: 0;
    width: var(--rail-w);
    background: var(--c-night);
    border-right: 1px solid var(--line);
    transition: width 220ms var(--ease);
  }
  .topbar { display: none; }
  .scrim { display: none; }

  .rail {
    position: static;
    width: 100%; height: 100%;
    padding: 24px 10px 18px;
    gap: 22px;
    transform: none;
    border-right: 0;
    background: transparent;
    overflow-y: auto;
  }
  .rail__top { text-align: center; }
  .rail__brand { flex-direction: column; gap: 12px; }
  .rail__brand .brand-mark { margin: 0 auto; }
  .rail__name {
    writing-mode: vertical-rl;
    font-size: 15px; letter-spacing: 0.3em;
    margin: 0 auto;
  }
  .rail__tagline {
    margin: 12px 0 0;
    font-size: 11px; line-height: 1.7; letter-spacing: 0.12em;
    text-align: center;
  }

  .rail__list { gap: 0; }
  .rail__link {
    gap: 6px;
    padding: 9px 6px;
    font-size: 12px; letter-spacing: 0.02em; line-height: 1.3;
  }
  .rail__text { display: inline-block; }

  .rail__actions { align-items: center; gap: 18px; padding-top: 18px; }
  .rail__cta {
    width: auto;
    writing-mode: vertical-rl;
    padding: 18px 10px;
    font-size: 13px; letter-spacing: 0.16em;
    border-radius: 999px;
    text-orientation: upright;
  }
  .rail__utility { flex-direction: row; justify-content: center; gap: 10px; }
  .rail__utility-link {
    writing-mode: vertical-rl;
    padding: 8px 5px;
    font-size: 11px; letter-spacing: 0.14em;
    border-left: 1px solid var(--line);
  }

  .rail__collapse {
    position: relative;
    display: inline-flex; align-items: center; justify-content: center;
    width: 34px; height: 34px; padding: 0;
    background: transparent;
    border: 1px solid var(--line-strong);
    border-radius: 999px;
    color: var(--c-haze);
    cursor: pointer;
    transition: color 160ms var(--ease), border-color 160ms var(--ease);
  }
  .rail__collapse:hover { color: var(--c-cyan); border-color: var(--c-cyan); }
  .rail__collapse-icon {
    width: 7px; height: 7px;
    border-left: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
    transform: rotate(45deg);
    transition: transform 180ms var(--ease);
  }
  html[data-rail="collapsed"] .rail__collapse-icon { transform: rotate(-135deg); }
  .rail__collapse-label {
    position: absolute; width: 1px; height: 1px;
    padding: 0; margin: -1px; overflow: hidden;
    clip-path: inset(50%); white-space: nowrap;
  }

  /* 收起为图标条 */
  html[data-rail="collapsed"] .rail__tagline { display: none; }
  html[data-rail="collapsed"] .rail__name { font-size: 13px; letter-spacing: 0.22em; }
  html[data-rail="collapsed"] .rail__text {
    position: absolute; width: 1px; height: 1px;
    padding: 0; margin: -1px; overflow: hidden;
    clip-path: inset(50%); white-space: nowrap;
  }
  html[data-rail="collapsed"] .rail__link { justify-content: center; padding: 12px 6px; }
  html[data-rail="collapsed"] .rail__dot { width: 7px; height: 7px; }
  html[data-rail="collapsed"] .rail__cta { font-size: 12px; padding: 16px 8px; letter-spacing: 0.12em; }

  .progress-rail {
    top: 0; left: auto; right: 0;
    width: 2px; height: 100vh;
  }
  .progress-rail__bar {
    transform: scaleY(var(--p, 0));
    transform-origin: center top;
    background: linear-gradient(180deg, var(--c-cyan), var(--c-violet) 55%, var(--c-amber));
  }
}

@media (min-width: 1024px) and (max-height: 880px) {
  .rail__tagline { display: none; }
  .rail { padding-top: 18px; gap: 16px; }
}

/* ---------- 16. 页脚 ---------- */
.site-footer {
  position: relative;
  background: var(--c-night);
  border-top: 1px solid var(--line);
  color: var(--c-haze);
  font-size: 14px;
}
.site-footer::before {
  content: ""; display: block; height: 2px;
  background: linear-gradient(90deg, var(--c-cyan), var(--c-violet) 48%, var(--c-amber));
}
.footer__inner {
  display: grid; gap: 40px;
  grid-template-columns: minmax(0, 1fr);
  padding-block: 46px 36px;
}
.footer__eyebrow {
  margin: 0 0 10px;
  font-size: 11.5px; letter-spacing: 0.3em; color: var(--c-cyan);
}
.footer__brand {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 26px; font-weight: 700; letter-spacing: 0.2em;
  color: var(--c-lamp); text-decoration: none;
  transition: color 160ms var(--ease);
}
.footer__brand:hover { color: var(--c-cyan); }
.footer__line {
  margin: 14px 0 16px; max-width: 34ch;
  line-height: 1.9; color: var(--c-haze);
}
.footer__icp {
  margin: 0; display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px; letter-spacing: 0.04em;
  color: var(--c-haze);
  border-left: 2px solid var(--c-amber);
  padding-left: 10px;
}
.footer__cols { display: grid; gap: 26px; grid-template-columns: minmax(0, 1fr); }
.footer__col { border-top: 1px solid var(--line); padding-top: 16px; }
.footer__col--feedback {
  border-top-color: rgba(245, 166, 35, 0.6);
  background: linear-gradient(180deg, var(--tint-amber), transparent 72%);
  padding-inline: 12px;
  margin-inline: -12px;
}
.footer__title {
  margin: 0 0 12px;
  font-size: 12.5px; font-weight: 700; letter-spacing: 0.24em;
  color: var(--c-lamp);
}
.footer__list { display: flex; flex-direction: column; gap: 8px; margin: 0 0 14px; padding: 0; list-style: none; }
.footer__link {
  color: var(--c-haze); text-decoration: none; font-size: 14px;
  border-bottom: 1px solid transparent;
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}
.footer__link:hover { color: var(--c-cyan); border-bottom-color: currentColor; }
.footer__note {
  margin: 0;
  font-size: 12.5px; line-height: 1.85; letter-spacing: 0.02em;
  color: rgba(124, 147, 176, 0.86);
  border-left: 1px solid var(--line);
  padding-left: 10px;
}
.footer__bottom {
  display: flex; flex-wrap: wrap; align-items: center; gap: 10px 26px;
  padding-block: 18px 30px;
  border-top: 1px solid var(--line);
  font-size: 12.5px;
}
.footer__copy { margin: 0; color: var(--c-haze); font-family: var(--font-mono); letter-spacing: 0.04em; }
.footer__meta-list { display: flex; flex-wrap: wrap; gap: 8px 18px; margin: 0 0 0 auto; padding: 0; list-style: none; }
.footer__meta-link {
  color: var(--c-haze); text-decoration: none;
  transition: color 160ms var(--ease);
}
.footer__meta-link:hover { color: var(--c-cyan); }

@media (min-width: 640px) {
  .footer__cols { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 30px 28px; }
}
@media (min-width: 1024px) {
  .footer__inner {
    grid-template-columns: minmax(240px, 0.95fr) minmax(0, 2.6fr);
    gap: 56px;
    padding-block: 60px 44px;
  }
  .footer__cols { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 28px; }
  .footer__line { font-size: 14.5px; }
}

@media (max-width: 560px) {
  .topbar__meta { display: none; }
}

/* ---------- 17. 动效降级 ---------- */
@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;
    transition-delay: 0ms !important;
  }
  html[data-js="on"] [data-reveal] { opacity: 1; transform: none; }
  .progress-rail__bar { transition: none; }
}