/* ==========================================================================
   买球平台官方 · 共享样式表 /assets/site.css
   设计命题：夜间赛场控制室 —— 传送字幕、坐标索引、地图图例
   ========================================================================== */

/* 1. 变量 ------------------------------------------------------------------ */
:root {
  --ink: #0B1F1A;
  --night: #0A1830;
  --panel: #122A24;
  --lime: #C6FF4A;
  --orange: #FF8A3D;
  --cyan: #38E1C6;
  --mute: #8FA3B8;
  --paper: #F5F7F2;
  --gold: #D7B56D;
  --alert: #FF5C5C;

  --line: rgba(143, 163, 184, 0.22);
  --line-soft: rgba(143, 163, 184, 0.12);
  --line-strong: rgba(198, 255, 74, 0.5);
  --text: rgba(245, 247, 242, 0.86);
  --text-dim: rgba(245, 247, 242, 0.68);

  --font-display: "Noto Sans SC", "Barlow Condensed", "Oswald", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", Inter, system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Consolas, monospace;

  --shell: 1280px;
  --gutter: clamp(18px, 4vw, 48px);
  --header-h: 74px;
  --radius: 2px;

  --shadow-hard: 8px 8px 0 rgba(0, 0, 0, 0.45);
  --shadow-lift: 0 26px 60px -34px rgba(0, 0, 0, 0.9);

  --grad-hero: linear-gradient(150deg, #0A1830 0%, #0B1F1A 48%, #122A24 100%);
  --grad-lime: linear-gradient(110deg, #C6FF4A 0%, #38E1C6 100%);
  --grad-signal: linear-gradient(110deg, #FF8A3D 0%, #C6FF4A 100%);

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

@media (max-width: 900px) {
  :root { --header-h: 62px; }
}

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

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

html.is-nav-open { overflow: hidden; }

body {
  margin: 0;
  background: var(--ink);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16.5px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 0.5em;
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--paper);
}

p { margin: 0 0 1em; }
ul, ol { margin: 0 0 1em; }

a { color: var(--lime); text-decoration: none; }
a:hover { color: var(--paper); }

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

button { font: inherit; color: inherit; }

::selection { background: var(--lime); color: #08211A; }

:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
}

[id] { scroll-margin-top: calc(var(--header-h) + 20px); }

/* 3. 版式工具 -------------------------------------------------------------- */
.display-xl {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(44px, 8vw, 96px);
  line-height: 0.98;
  letter-spacing: -0.02em;
  color: var(--paper);
  margin: 0 0 0.35em;
}

.display-lg {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 5vw, 62px);
  line-height: 1.04;
  letter-spacing: -0.015em;
  color: var(--paper);
  margin: 0 0 0.4em;
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mute);
}

.kicker::before {
  content: "";
  width: 24px;
  height: 2px;
  background: var(--lime);
}

.chapter {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 10px;
}

.chapter__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(28px, 5vw, 54px);
  line-height: 1;
  color: rgba(198, 255, 74, 0.28);
  -webkit-text-stroke: 1px rgba(198, 255, 74, 0.75);
}

.chapter__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mute);
}

.u-mono { font-family: var(--font-mono); letter-spacing: 0.04em; }
.u-lime { color: var(--lime); }
.u-orange { color: var(--orange); }
.u-mute { color: var(--mute); }
.u-center { text-align: center; }

.u-stack {
  display: flex;
  flex-direction: column;
  gap: var(--stack-gap, 16px);
}

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

.section { padding-block: clamp(48px, 7vw, 108px); }
.section--tight { padding-block: clamp(28px, 4vw, 56px); }

#main-content {
  padding-top: var(--header-h);
  display: block;
}

.bleed-top {
  margin-top: calc(var(--header-h) * -1);
  padding-top: var(--header-h);
}

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

@media (max-width: 980px) {
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--asym { grid-template-columns: minmax(0, 1fr); }
}

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

/* 5. 按钮 ------------------------------------------------------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 22px;
  border: 2px solid transparent;
  border-radius: var(--radius);
  background: transparent;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 15px;
  letter-spacing: 0.04em;
  color: var(--paper);
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.18s var(--ease), box-shadow 0.18s var(--ease),
    background-color 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.btn--primary {
  background: var(--lime);
  border-color: var(--lime);
  color: #08211A;
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.55);
}

.btn--primary:hover {
  color: #08211A;
  transform: translate(-2px, -2px);
  box-shadow: 7px 7px 0 rgba(0, 0, 0, 0.6);
}

.btn--ghost {
  border-color: var(--line-strong);
  background: rgba(18, 42, 36, 0.5);
  color: var(--lime);
}

.btn--ghost:hover {
  background: rgba(198, 255, 74, 0.12);
  color: var(--lime);
}

.btn--warm {
  background: var(--orange);
  border-color: var(--orange);
  color: #231000;
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.55);
}

.btn--warm:hover {
  color: #231000;
  transform: translate(-2px, -2px);
  box-shadow: 7px 7px 0 rgba(0, 0, 0, 0.6);
}

.btn--sm { padding: 9px 15px; font-size: 13px; }

/* 6. 标签与状态 ------------------------------------------------------------ */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 5px 10px;
  border: 1px solid var(--line);
  background: rgba(10, 24, 48, 0.55);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mute);
  white-space: nowrap;
}

.tag__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.tag--live { color: var(--lime); border-color: rgba(198, 255, 74, 0.5); }
.tag--next { color: var(--orange); border-color: rgba(255, 138, 61, 0.5); }
.tag--done { color: var(--cyan); border-color: rgba(56, 225, 198, 0.45); }
.tag--alert { color: var(--alert); border-color: rgba(255, 92, 92, 0.5); }

/* 7. 卡片 ------------------------------------------------------------------ */
.card {
  position: relative;
  padding: clamp(18px, 2.4vw, 28px);
  border: 2px solid var(--line);
  background: linear-gradient(160deg, rgba(18, 42, 36, 0.94), rgba(10, 24, 48, 0.94));
  box-shadow: var(--shadow-hard);
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease),
    box-shadow 0.25s var(--ease);
}

.card:hover {
  transform: translateY(-3px);
  border-color: var(--line-strong);
  box-shadow: 10px 10px 0 rgba(0, 0, 0, 0.5);
}

.card__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.card__eyebrow {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mute);
}

.card__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(20px, 2.3vw, 26px);
  line-height: 1.22;
  color: var(--paper);
}

.card__meta {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mute);
}

.card__body {
  margin: 0;
  font-size: 15.5px;
  color: var(--text-dim);
}

.card--paper {
  background: var(--paper);
  border-color: #0B1F1A;
  color: #12241F;
  box-shadow: 8px 8px 0 rgba(198, 255, 74, 0.9);
}

.card--paper .card__title,
.card--paper .card__num { color: #0B1F1A; }
.card--paper .card__eyebrow,
.card--paper .card__meta { color: #4B6A61; }
.card--paper .card__body { color: #22382F; }

/* 8. 数据刻度 -------------------------------------------------------------- */
.metric {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-left: 14px;
  border-left: 2px solid var(--line-strong);
}

.metric__value {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(22px, 3vw, 32px);
  line-height: 1.1;
  color: var(--lime);
}

.metric__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mute);
}

/* 9. 展开面板 -------------------------------------------------------------- */
.expand {
  margin-top: 14px;
  border: 1px solid var(--line);
  background: rgba(18, 42, 36, 0.55);
}

.expand__summary {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 16px;
  color: var(--paper);
}

.expand__summary::-webkit-details-marker { display: none; }

.expand__summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--lime);
  transition: transform 0.25s var(--ease);
}

.expand[open] > .expand__summary::after { content: "–"; }
.expand[open] > .expand__summary { color: var(--lime); }

.expand__body {
  padding: 0 16px 18px;
  font-size: 15.5px;
  color: var(--text-dim);
}

/* 10. 长文阅读区 ----------------------------------------------------------- */
.prose {
  max-width: 72ch;
  font-size: 17px;
  line-height: 1.85;
  color: var(--text);
}

.prose > *:first-child { margin-top: 0; }

.prose h2 {
  margin: 2.2em 0 0.6em;
  font-size: clamp(26px, 3.4vw, 38px);
}

.prose h3 {
  margin: 1.8em 0 0.5em;
  font-size: clamp(20px, 2.4vw, 25px);
}

.prose p, .prose ul, .prose ol { margin: 0 0 1.15em; }
.prose ul, .prose ol { padding-left: 1.25em; }
.prose li { margin-bottom: 0.5em; }
.prose strong { color: var(--paper); }

.prose a {
  color: var(--lime);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.prose blockquote {
  margin: 1.6em 0;
  padding: 4px 0 4px 18px;
  border-left: 3px solid var(--cyan);
  color: var(--mute);
}

.prose--paper {
  max-width: none;
  padding: clamp(24px, 4vw, 56px);
  background: var(--paper);
  border: 2px solid #0B1F1A;
  box-shadow: 12px 12px 0 rgba(198, 255, 74, 0.9);
  color: #22382F;
}

.prose--paper h2, .prose--paper h3 { color: #0B1F1A; }
.prose--paper strong { color: #0B1F1A; }
.prose--paper a { color: #0B6B57; }
.prose--paper blockquote { color: #4B6A61; border-left-color: #0B1F1A; }

/* 11. 面包屑 --------------------------------------------------------------- */
.breadcrumb { margin: 0 0 clamp(18px, 3vw, 34px); }

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mute);
}

.breadcrumb__item { display: inline-flex; align-items: center; gap: 8px; }

.breadcrumb__item::after {
  content: "/";
  color: rgba(143, 163, 184, 0.45);
}

.breadcrumb__item:last-child::after { content: ""; }

.breadcrumb__link { color: var(--mute); }
.breadcrumb__link:hover { color: var(--lime); }
.breadcrumb__current { color: var(--paper); }

/* 12. 图像容器（页面阶段放置图片的基础） ----------------------------------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  border: 2px solid var(--line);
  background: var(--grad-hero);
  box-shadow: var(--shadow-hard);
}

.media__frame {
  position: relative;
  aspect-ratio: var(--media-ratio, 16 / 9);
}

.media__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(143, 163, 184, 0.14) 1px, transparent 1px),
    linear-gradient(90deg, rgba(143, 163, 184, 0.14) 1px, transparent 1px);
  background-size: 46px 46px;
}

.media img,
.media__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media__caption {
  display: block;
  padding: 10px 12px;
  border-top: 1px solid var(--line);
  background: rgba(10, 24, 48, 0.72);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--mute);
}

.media__badge { position: absolute; top: 12px; left: 12px; z-index: 2; }

.media--wide { --media-ratio: 21 / 9; }
.media--tall { --media-ratio: 3 / 4; }
.media--square { --media-ratio: 1 / 1; }
.media--framed { box-shadow: 10px 10px 0 rgba(198, 255, 74, 0.85); }

/* 13. 跳过链接 ------------------------------------------------------------- */
.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 200;
  padding: 11px 16px;
  background: var(--lime);
  color: #08211A;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-decoration: none;
  transform: translateY(-180%);
  transition: transform 0.2s var(--ease);
}

.skip-link:focus { transform: none; color: #08211A; }

/* 14. 头部 ----------------------------------------------------------------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 90;
  background: linear-gradient(180deg, rgba(10, 24, 48, 0.78), rgba(10, 24, 48, 0));
  transition: background-color 0.3s var(--ease), box-shadow 0.3s var(--ease),
    border-color 0.3s var(--ease);
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
  background-color: rgba(10, 24, 48, 0.95);
  border-bottom-color: var(--line);
  box-shadow: 0 20px 44px -34px #000;
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.8vw, 26px);
  min-height: var(--header-h);
  padding-block: 10px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  color: var(--paper);
  text-decoration: none;
}

.brand:hover { color: var(--paper); }

.brand__mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border: 2px solid var(--lime);
  background: linear-gradient(140deg, rgba(198, 255, 74, 0.16), rgba(56, 225, 198, 0.05));
  box-shadow: 3px 3px 0 rgba(0, 0, 0, 0.5);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--lime);
}

.brand__text { display: flex; flex-direction: column; line-height: 1.15; }
.brand__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 17px;
  color: var(--paper);
}
.brand__sub {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mute);
}

.season-tag {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin: 0;
  padding: 6px 11px;
  border: 1px solid var(--line);
  background: rgba(18, 42, 36, 0.62);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--mute);
  white-space: nowrap;
}

.season-tag__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--lime);
  animation: pulse-dot 2.4s var(--ease) infinite;
}

@keyframes pulse-dot {
  0%, 100% { box-shadow: 0 0 0 0 rgba(198, 255, 74, 0.55); }
  50% { box-shadow: 0 0 0 5px rgba(198, 255, 74, 0); }
}

.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  margin-left: auto;
  padding: 0;
  border: 2px solid var(--line);
  background: rgba(18, 42, 36, 0.72);
  color: var(--paper);
  cursor: pointer;
}

.nav-toggle__bar {
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  transition: transform 0.25s var(--ease), opacity 0.2s var(--ease);
}

.nav-toggle[aria-expanded="true"] { border-color: var(--lime); color: var(--lime); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.primary-nav { flex: 1 1 auto; min-width: 0; margin-left: auto; }

.primary-nav__list {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: clamp(2px, 0.8vw, 12px);
  margin: 0;
  padding: 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.primary-nav__list::-webkit-scrollbar { display: none; }

.primary-nav__item { flex: 0 0 auto; }

.primary-nav__link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 11px 8px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 15px;
  letter-spacing: 0.02em;
  color: rgba(245, 247, 242, 0.76);
  white-space: nowrap;
  transition: color 0.2s var(--ease);
}

.primary-nav__link::after {
  content: "";
  position: absolute;
  left: 8px;
  right: 8px;
  bottom: 4px;
  height: 2px;
  background: var(--lime);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.25s var(--ease);
}

.primary-nav__link:hover { color: var(--paper); }
.primary-nav__link:hover::after { transform: scaleX(1); }

.primary-nav__link[aria-current="page"] { color: var(--lime); }
.primary-nav__link[aria-current="page"]::after { transform: scaleX(1); }

.primary-nav__index {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  color: var(--cyan);
  opacity: 0.75;
}

.header-cta { flex: 0 0 auto; white-space: nowrap; }

.read-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: rgba(143, 163, 184, 0.16);
}

.read-progress__fill {
  display: block;
  height: 100%;
  width: 0;
  background: var(--grad-lime);
  transition: width 0.12s linear;
}

@media (max-width: 1150px) {
  .header-cta { display: none; }
}

@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }

  .primary-nav {
    position: fixed;
    left: 0;
    right: 0;
    top: var(--header-h);
    max-height: calc(100vh - var(--header-h));
    margin-left: 0;
    padding: 10px var(--gutter) 24px;
    overflow-y: auto;
    background: linear-gradient(180deg, #0A1830 0%, #0B1F1A 100%);
    border-bottom: 2px solid var(--lime);
    box-shadow: 0 40px 60px -40px #000;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-14px);
    transition: opacity 0.24s var(--ease), transform 0.24s var(--ease), visibility 0.24s;
  }

  .primary-nav[data-open] {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: none;
  }

  .primary-nav__list {
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
    overflow: visible;
  }

  .primary-nav__item { width: 100%; }

  .primary-nav__link {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 12px;
    padding: 15px 4px;
    font-size: 17px;
    border-bottom: 1px solid var(--line);
    color: rgba(245, 247, 242, 0.86);
  }

  .primary-nav__link::after { display: none; }

  .primary-nav__link[aria-current="page"] {
    color: var(--lime);
    border-bottom-color: var(--line-strong);
  }
}

@media (max-width: 640px) {
  .season-tag { display: none; }
  .brand__name { font-size: 16px; }
  .brand__sub { font-size: 9px; letter-spacing: 0.14em; }
}

/* 15. 页脚 ----------------------------------------------------------------- */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 8vw, 120px);
  padding-top: clamp(40px, 6vw, 76px);
  border-top: 2px solid var(--lime);
  background:
    linear-gradient(180deg, rgba(11, 31, 26, 0.98) 0%, rgba(10, 24, 48, 0.98) 72%),
    linear-gradient(rgba(143, 163, 184, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(143, 163, 184, 0.08) 1px, transparent 1px);
  background-size: auto, 62px 62px, 62px 62px;
  color: var(--mute);
}

.footer__inner { padding-bottom: clamp(20px, 3vw, 32px); }

.footer__top {
  display: grid;
  grid-template-columns: minmax(240px, 1.5fr) repeat(4, minmax(0, 1fr));
  gap: clamp(22px, 3vw, 44px);
  padding-bottom: clamp(26px, 4vw, 46px);
  border-bottom: 1px solid var(--line);
}

.footer__brand { display: flex; flex-direction: column; gap: 14px; }

.brand--footer { align-items: flex-start; }
.brand--footer .brand__mark { width: 46px; height: 46px; font-size: 14px; }
.brand--footer .brand__name { font-size: 19px; }

.footer__note {
  margin: 0;
  max-width: 34ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-dim);
}

.footer__coords {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.footer-col { display: block; }

.footer-col__title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--paper);
}

.footer-col__title::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--lime);
  transform: rotate(45deg);
}

.footer-col__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col__link {
  display: inline-block;
  font-size: 14.5px;
  color: rgba(245, 247, 242, 0.74);
  transition: color 0.2s var(--ease), transform 0.2s var(--ease);
}

.footer-col__link:hover {
  color: var(--lime);
  transform: translateX(3px);
}

.footer__contact {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(16px, 2.4vw, 32px);
  padding: clamp(24px, 3.4vw, 40px) 0;
  border-bottom: 1px solid var(--line);
}

.contact-item {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  gap: 4px 12px;
  padding-left: 14px;
  border-left: 2px solid rgba(198, 255, 74, 0.36);
}

.contact-item__label {
  grid-column: 1 / -1;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.contact-item__value {
  font-size: 15px;
  color: var(--paper);
  word-break: break-word;
}

.copy-btn {
  padding: 6px 11px;
  border: 1px solid var(--line-strong);
  background: rgba(198, 255, 74, 0.08);
  color: var(--lime);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  cursor: pointer;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease),
    border-color 0.2s var(--ease);
}

.copy-btn:hover { background: var(--lime); color: #08211A; }

.copy-btn.is-copied {
  background: var(--orange);
  border-color: var(--orange);
  color: #231000;
}

.footer__contact-note {
  grid-column: 1 / -1;
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mute);
}

.footer__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  padding-top: clamp(18px, 2.4vw, 26px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: rgba(143, 163, 184, 0.9);
}

.footer__legal-text { margin: 0; }

.footer__legal-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.legal-link {
  color: rgba(245, 247, 242, 0.72);
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.legal-link:hover {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

@media (max-width: 1080px) {
  .footer__top { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .footer__brand { grid-column: 1 / -1; }
  .footer__note { max-width: 56ch; }
}

@media (max-width: 860px) {
  .footer__contact { grid-template-columns: minmax(0, 1fr); }
}

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

@media (max-width: 420px) {
  .footer__top { grid-template-columns: minmax(0, 1fr); }
}

/* 16. 显现动效 ------------------------------------------------------------- */
.has-js [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

.has-js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* 17. 降低动效 ------------------------------------------------------------- */
@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;
  }

  .has-js [data-reveal] { opacity: 1; transform: none; }
  .season-tag__dot { animation: none; }
}