/* ==========================================================================
   亿德体育 · 共享样式表 /assets/site.css
   设计基调：夜场战术板 —— 夜墨绿分层背景 + 荧光青跑位线 + 焰橙记分牌数字
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. 设计变量
   -------------------------------------------------------------------------- */
:root {
  --ink: #06120F;
  --board: #0C231C;
  --turf: #143A2C;
  --cyan: #3BF0C4;
  --mist: #9FE9D6;
  --flame: #FF5B2E;
  --cream: #F5F2E9;
  --char: #1A1E1C;
  --graphite: #6E8079;

  --line: rgba(59, 240, 196, .22);
  --line-strong: rgba(59, 240, 196, .5);
  --line-soft: rgba(159, 233, 214, .14);
  --cyan-wash: rgba(59, 240, 196, .07);
  --board-lift: #0E2A22;

  --sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;

  --ease: cubic-bezier(.22, .61, .36, 1);
  --dur: 200ms;
  --rail-w: 88px;
  --rail-open: 248px;
  --bar-h: 64px;
  --gap: clamp(16px, 2.4vw, 28px);
  --content-max: 1280px;
}

/* --------------------------------------------------------------------------
   2. Reset 与基础排版
   -------------------------------------------------------------------------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body,
h1, h2, h3, h4, h5, p, ul, ol, li, figure, blockquote, dl, dd { margin: 0; padding: 0; }

ul, ol { list-style: none; }

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

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

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

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

[hidden] { display: none !important; }

::selection { background: var(--cyan); color: var(--ink); }

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

body {
  margin: 0;
  min-height: 100vh;
  padding-top: var(--bar-h);
  background: var(--ink);
  color: var(--cream);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: .02em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body.nav-open { overflow: hidden; }

main { display: block; }

b, strong { font-weight: 900; }

/* --------------------------------------------------------------------------
   3. 共享头部：移动顶栏 + 侧边轨道（抽屉）
   -------------------------------------------------------------------------- */
.site-header { position: relative; z-index: 90; }

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--cyan);
  color: var(--ink);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: .08em;
  border-radius: 3px;
  transform: translateY(-180%);
  transition: transform var(--dur) var(--ease);
}
.skip-link:focus { transform: translateY(0); }

/* 移动端顶栏 */
.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--bar-h);
  z-index: 95;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 16px;
  background: rgba(6, 18, 15, .94);
  border-bottom: 1px solid var(--line);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}
.brand__mark {
  flex: 0 0 auto;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  border: 1px solid var(--line);
  border-radius: 3px;
  background: var(--cyan-wash);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.brand:hover .brand__mark { border-color: var(--cyan); }
.brand__text {
  display: flex;
  flex-direction: column;
  min-width: 0;
  overflow: hidden;
  white-space: nowrap;
}
.brand__name {
  font-size: 15px;
  font-weight: 900;
  letter-spacing: .06em;
  line-height: 1.35;
  color: var(--cream);
}
.brand__tag {
  font-size: 11px;
  letter-spacing: .14em;
  line-height: 1.5;
  color: var(--graphite);
}
.brand--footer .brand__mark { width: 40px; height: 40px; font-size: 17px; }
.brand--footer .brand__name { font-size: 17px; letter-spacing: .08em; }

/* 汉堡按钮 */
.nav-toggle {
  flex: 0 0 auto;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  color: var(--cyan);
  border: 1px solid var(--line);
  border-radius: 3px;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.nav-toggle:hover { border-color: var(--cyan); background: var(--cyan-wash); }
.nav-toggle__lines { position: relative; display: block; width: 20px; height: 14px; }
.nav-toggle__line {
  position: absolute;
  left: 0;
  width: 100%;
  height: 1.5px;
  border-radius: 1px;
  background: currentColor;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.nav-toggle__line:nth-child(1) { top: 0; }
.nav-toggle__line:nth-child(2) { top: 6px; }
.nav-toggle__line:nth-child(3) { top: 12px; }
.site-header[data-open] .nav-toggle__line:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.site-header[data-open] .nav-toggle__line:nth-child(2) { opacity: 0; }
.site-header[data-open] .nav-toggle__line:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* 侧边轨道 / 移动抽屉 */
.rail {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 96;
  width: min(86vw, 336px);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--ink);
  border-right: 1px solid var(--line);
  transform: translateX(-102%);
  transition: transform 240ms var(--ease), width 220ms var(--ease);
}
.site-header[data-open] .rail { transform: translateX(0); }

.rail__head {
  flex: 0 0 auto;
  padding: 18px 18px 14px;
  border-bottom: 1px solid var(--line-soft);
}

.rail__nav {
  flex: 1 1 auto;
  overflow-y: auto;
  padding: 10px 0 16px;
}

.rail-list { display: grid; }
.rail-list__item { display: block; }

.rail-link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 13px 18px;
  color: var(--mist);
  font-size: 15px;
  letter-spacing: .04em;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.rail-link__idx {
  flex: 0 0 auto;
  width: 26px;
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--graphite);
  transition: color var(--dur) var(--ease);
}
.rail-link__label {
  white-space: nowrap;
  transition: opacity 180ms var(--ease), transform 180ms var(--ease);
}
.rail-link:hover { color: var(--cream); background: rgba(59, 240, 196, .05); }
.rail-link:hover .rail-link__idx { color: var(--cyan); }
.rail-link[aria-current="page"] { color: var(--cyan); background: var(--cyan-wash); }
.rail-link[aria-current="page"] .rail-link__idx { color: var(--cyan); }
.rail-link[aria-current="page"]::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 3px;
  height: 20px;
  transform: translateY(-50%);
  background: var(--cyan);
}

.rail__foot {
  flex: 0 0 auto;
  display: grid;
  gap: 12px;
  padding: 16px 18px 26px;
  border-top: 1px solid var(--line-soft);
}
.rail-app {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 11px 16px;
  color: var(--cyan);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: .08em;
  border: 1px solid var(--cyan);
  border-radius: 3px;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.rail-app:hover { background: var(--cyan); color: var(--ink); }
.rail__contact {
  display: flex;
  gap: 10px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--graphite);
}
.rail__contact-k { font-family: var(--mono); letter-spacing: .16em; }
.rail__contact-v { font-family: var(--mono); font-variant-numeric: tabular-nums; color: var(--mist); }

.rail__progress { display: none; }

.rail-scrim {
  position: fixed;
  inset: 0;
  z-index: 93;
  background: rgba(6, 18, 15, .74);
  opacity: 0;
  visibility: hidden;
  transition: opacity 240ms var(--ease), visibility 240ms var(--ease);
}
.site-header[data-open] .rail-scrim { opacity: 1; visibility: visible; }

.app-cta { display: none; }

/* --------------------------------------------------------------------------
   4. 桌面端：固定左侧 88px 轨道
   -------------------------------------------------------------------------- */
@media (min-width: 1024px) {
  body {
    padding-top: 0;
    padding-left: var(--rail-w);
  }

  .topbar { display: none; }
  .rail-scrim { display: none; }

  .rail {
    width: var(--rail-w);
    transform: none;
    transition: width 220ms var(--ease);
  }
  .rail:hover,
  .rail:focus-within { width: var(--rail-open); }

  .rail__head { padding: 22px 26px 16px; }
  .rail__nav { padding: 12px 0 20px; }
  .rail-link { padding: 13px 26px; }

  .rail .brand__text {
    max-width: 0;
    opacity: 0;
    transition: opacity 160ms var(--ease), max-width 220ms var(--ease);
  }
  .rail:hover .brand__text,
  .rail:focus-within .brand__text { max-width: 184px; opacity: 1; }

  .rail-link__label { opacity: 0; transform: translateX(-6px); }
  .rail:hover .rail-link__label,
  .rail:focus-within .rail-link__label { opacity: 1; transform: none; }

  .rail__foot { display: none; }

  .rail__progress {
    display: block;
    position: absolute;
    top: 0;
    right: 0;
    width: 2px;
    height: 0;
    background: var(--cyan);
    opacity: .85;
  }

  .app-cta {
    display: inline-flex;
    align-items: center;
    position: fixed;
    top: 26px;
    right: clamp(20px, 4vw, 64px);
    z-index: 92;
    padding: 10px 18px;
    color: var(--cyan);
    font-size: 13px;
    font-weight: 900;
    letter-spacing: .08em;
    background: rgba(6, 18, 15, .68);
    border: 1px solid var(--cyan);
    border-radius: 3px;
    transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
  }
  .app-cta:hover { background: var(--cyan); color: var(--ink); }
}

/* --------------------------------------------------------------------------
   5. 正文容器与章节骨架
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: 20px;
}

@media (min-width: 640px) {
  .container { padding-inline: 28px; }
}

@media (min-width: 1024px) {
  .container {
    padding-left: clamp(32px, 4vw, 72px);
    padding-right: clamp(56px, 13vw, 220px);
  }
}

.section {
  padding-block: clamp(44px, 6.5vw, 100px);
  border-top: 1px solid var(--line-soft);
}
.section:first-of-type { border-top: 0; }

.section__head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(24px, 3vw, 44px);
}
.section__idx {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: .32em;
  color: var(--cyan);
}
.section__title {
  font-weight: 200;
  font-size: clamp(28px, 3.6vw, 44px);
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--cream);
}
.section__title strong,
.section__title b { font-weight: 900; letter-spacing: -.02em; }
.section__lead {
  max-width: 62ch;
  font-size: 15px;
  color: var(--mist);
}

@media (min-width: 1024px) {
  .section__head {
    grid-template-columns: 176px minmax(0, 1fr);
    column-gap: 28px;
    row-gap: 12px;
    align-items: start;
  }
  .section__idx { grid-column: 1; grid-row: 1; padding-top: .7em; }
  .section__title { grid-column: 2; grid-row: 1; }
  .section__lead { grid-column: 2; grid-row: 2; }
}

/* 标题体系 */
.display {
  font-family: var(--sans);
  font-weight: 200;
  font-size: clamp(44px, 8.5vw, 124px);
  line-height: .96;
  letter-spacing: -.015em;
  color: var(--cream);
}
.display__bold {
  display: block;
  font-weight: 900;
  letter-spacing: -.02em;
}
.eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .32em;
  color: var(--mist);
}
.lede {
  max-width: 56ch;
  font-size: clamp(15px, 1.5vw, 18px);
  line-height: 1.85;
  color: var(--mist);
}

/* --------------------------------------------------------------------------
   6. 栅格与分屏
   -------------------------------------------------------------------------- */
.grid { display: grid; gap: var(--gap); }
.grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }

@media (min-width: 700px) {
  .grid--2, .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 900px) {
  .grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (min-width: 1120px) {
  .grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (min-width: 1024px) {
  .stagger { align-items: start; }
  .stagger > *:nth-child(2n) { margin-top: 36px; }
  .stagger > *:nth-child(3n) { margin-top: 68px; }
}

.split { display: grid; gap: clamp(24px, 4vw, 56px); align-items: center; }
@media (min-width: 960px) {
  .split { grid-template-columns: 5fr 7fr; }
  .split--reverse { grid-template-columns: 7fr 5fr; }
}

/* 纯 CSS 球场俯视网格：首屏视觉侧 */
.turf-grid {
  position: relative;
  overflow: hidden;
  min-height: clamp(220px, 34vw, 430px);
  border: 1px solid var(--line);
  border-radius: 3px;
  background:
    repeating-linear-gradient(0deg, rgba(59, 240, 196, .07) 0 1px, transparent 1px 44px),
    repeating-linear-gradient(90deg, rgba(59, 240, 196, .07) 0 1px, transparent 1px 44px),
    radial-gradient(120% 90% at 18% 0%, rgba(59, 240, 196, .14), transparent 62%),
    linear-gradient(160deg, var(--turf), var(--ink));
}
.turf-grid::after {
  content: "";
  position: absolute;
  left: 12%;
  right: 6%;
  bottom: 26%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  transform: rotate(-13deg);
}

/* --------------------------------------------------------------------------
   7. 卡片、数据与标签
   -------------------------------------------------------------------------- */
.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 22px;
  background: var(--board);
  border: 1px solid var(--line);
  border-radius: 3px;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), background var(--dur) var(--ease);
}
.card:hover {
  border-color: var(--cyan);
  background: var(--board-lift);
  transform: translateY(-2px);
}
.card__title {
  font-size: clamp(18px, 1.6vw, 22px);
  font-weight: 700;
  letter-spacing: .01em;
  line-height: 1.4;
  color: var(--cream);
}
.card__meta {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--graphite);
}
.card__body { font-size: 15px; line-height: 1.75; color: var(--mist); }

.stat { display: grid; gap: 6px; }
.stat__value {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-weight: 900;
  font-size: clamp(30px, 4.4vw, 46px);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--cyan);
}
.stat--flame .stat__value { color: var(--flame); }
.stat__unit {
  margin-left: 6px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--graphite);
}
.stat__label { font-size: 13px; letter-spacing: .08em; color: var(--mist); }

.chip-row { display: flex; flex-wrap: wrap; gap: 10px; }

.chip {
  padding: 8px 15px;
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--mist);
  border: 1px solid var(--line);
  border-radius: 999px;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.chip:hover { border-color: var(--line-strong); color: var(--cream); }
.chip[aria-pressed="true"] {
  color: var(--cyan);
  border-color: var(--cyan);
  background: var(--cyan-wash);
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 18px;
  padding: 14px 0;
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}
.filter-bar__count {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--graphite);
  margin-left: auto;
}
.filter-reset {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--mist);
  padding: 6px 10px;
  border: 1px solid transparent;
  border-radius: 3px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.filter-reset:hover { color: var(--cyan); border-color: var(--line); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--mist);
  border: 1px solid var(--line);
  border-radius: 2px;
}
.tag--accent { color: var(--cyan); border-color: var(--cyan); }

/* --------------------------------------------------------------------------
   8. 表格与展览标签式列表
   -------------------------------------------------------------------------- */
.table-wrap {
  width: 100%;
  overflow-x: auto;
  background: var(--board);
  border: 1px solid var(--line);
  border-radius: 3px;
}
.data-table { min-width: 640px; font-size: 14px; }
.data-table th,
.data-table td {
  padding: 12px 16px;
  text-align: left;
  white-space: nowrap;
  border-bottom: 1px solid var(--line-soft);
}
.data-table thead th {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--graphite);
  background: rgba(20, 58, 44, .55);
}
.data-table tbody tr:last-child td { border-bottom: 0; }
.data-table tbody tr { transition: background var(--dur) var(--ease); }
.data-table tbody tr:hover { background: var(--cyan-wash); }
.data-table .is-num {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  color: var(--cream);
}
.data-table .is-strong {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-weight: 900;
  color: var(--flame);
}

.exhibit-list { border-top: 1px solid var(--line); }
.exhibit {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 4px 16px;
  padding: 18px 16px;
  color: var(--mist);
  border-bottom: 1px solid var(--line);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.exhibit:hover {
  border-color: var(--cyan);
  background: var(--cyan-wash);
  color: var(--cream);
}
.exhibit__idx {
  grid-row: span 2;
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--cyan);
}
.exhibit__title { font-size: 16px; font-weight: 700; color: var(--cream); }
.exhibit__meta { font-size: 12px; letter-spacing: .08em; color: var(--graphite); }

@media (min-width: 800px) {
  .exhibit {
    grid-template-columns: 64px minmax(0, 1fr) auto;
    align-items: center;
    padding: 20px 18px;
  }
  .exhibit__idx { grid-row: auto; }
  .exhibit__title { grid-column: 2; }
  .exhibit__meta { grid-column: 3; text-align: right; }
}

/* --------------------------------------------------------------------------
   9. 按钮与面包屑
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 22px;
  font-size: 14px;
  font-weight: 900;
  letter-spacing: .08em;
  border: 1px solid var(--cyan);
  border-radius: 3px;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.btn--solid { background: var(--cyan); color: var(--ink); }
.btn--solid:hover { background: var(--mist); border-color: var(--mist); }
.btn--ghost { color: var(--cyan); background: transparent; }
.btn--ghost:hover { background: var(--cyan-wash); }
.btn--flame { color: var(--flame); border-color: var(--flame); background: transparent; }
.btn--flame:hover { background: var(--flame); color: var(--ink); }

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--graphite);
}
.breadcrumbs__item { display: inline-flex; align-items: center; gap: 8px; }
.breadcrumbs__item + .breadcrumbs__item::before { content: "/"; color: var(--line-strong); }
.breadcrumbs a { transition: color var(--dur) var(--ease); }
.breadcrumbs a:hover { color: var(--cyan); }
.breadcrumbs [aria-current="page"] { color: var(--mist); }

/* --------------------------------------------------------------------------
   10. 响应式图片容器
   -------------------------------------------------------------------------- */
.media {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 3px;
  background:
    repeating-linear-gradient(115deg, rgba(59, 240, 196, .05) 0 2px, transparent 2px 22px),
    linear-gradient(150deg, var(--turf), var(--ink) 78%);
}
.media--16x9 { aspect-ratio: 16 / 9; }
.media--4x3 { aspect-ratio: 4 / 3; }
.media--1x1 { aspect-ratio: 1 / 1; }
.media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.92) contrast(1.06) brightness(.92);
  transition: filter 260ms var(--ease);
}
.media:hover img { filter: saturate(1) contrast(1.12) brightness(.98); }
.media::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 52%;
  pointer-events: none;
  background: linear-gradient(to top, var(--ink), rgba(6, 18, 15, 0));
}
.media__label {
  position: absolute;
  left: 14px;
  bottom: 12px;
  z-index: 2;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--cyan);
}

/* --------------------------------------------------------------------------
   11. 滚动显现与过滤状态
   -------------------------------------------------------------------------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 520ms var(--ease), transform 520ms var(--ease);
}
.js [data-reveal].is-visible { opacity: 1; transform: none; }

.is-filtered-out { display: none !important; }

/* --------------------------------------------------------------------------
   12. 共享页脚：深墨绿三段式
   -------------------------------------------------------------------------- */
.site-footer {
  margin-top: clamp(56px, 8vw, 120px);
  color: var(--mist);
  background: var(--ink);
  border-top: 1px solid var(--line-strong);
}
.site-footer__inner {
  width: 100%;
  max-width: var(--content-max);
  margin-inline: auto;
  padding: clamp(40px, 5vw, 72px) 20px clamp(28px, 3vw, 44px);
  display: grid;
  gap: clamp(28px, 4vw, 56px);
}
@media (min-width: 640px) {
  .site-footer__inner { padding-inline: 28px; }
}
@media (min-width: 900px) {
  .site-footer__inner {
    grid-template-columns: minmax(0, 3fr) minmax(0, 4fr) minmax(0, 4fr);
    padding-inline: clamp(28px, 4vw, 72px);
  }
}

.site-footer__brand { display: grid; gap: 16px; align-content: start; }
.site-footer__line {
  max-width: 34ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--graphite);
}

.site-footer__nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 40px);
  align-content: start;
}
.foot-col__title {
  margin-bottom: 14px;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: .24em;
  color: var(--cyan);
}
.foot-list { display: grid; gap: 10px; }
.foot-list a {
  font-size: 14px;
  color: var(--mist);
  transition: color var(--dur) var(--ease);
}
.foot-list a:hover { color: var(--cyan); }

.site-footer__contact { display: grid; gap: 12px; align-content: start; }
.contact-list { display: grid; gap: 10px; }
.contact-list__item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  font-size: 14px;
}
.contact-list__k {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--graphite);
}
.contact-list__v {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  color: var(--cream);
  word-break: break-word;
}
.contact-note { font-size: 12px; line-height: 1.75; color: var(--graphite); }

.site-footer__base {
  width: 100%;
  max-width: var(--content-max);
  margin-inline: auto;
  padding: 18px 20px 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--line);
}
@media (min-width: 640px) {
  .site-footer__base { padding-inline: 28px; }
}
@media (min-width: 900px) {
  .site-footer__base { padding-inline: clamp(28px, 4vw, 72px); }
}
.base-legal {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--graphite);
}
.base-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  font-size: 12px;
  letter-spacing: .08em;
}
.base-links a { color: var(--mist); transition: color var(--dur) var(--ease); }
.base-links a:hover { color: var(--cyan); }

/* --------------------------------------------------------------------------
   13. 降低动效偏好
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .js [data-reveal] { opacity: 1; transform: none; }
  .card:hover { transform: none; }
  .media:hover img { filter: saturate(.92) contrast(1.06) brightness(.92); }
}