/* ============================================================
   RAY 电竞馆 / 共享样式 /assets/site.css
   轨道导航 · 暗场控制台 · 等宽索引
   ============================================================ */

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

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

body,
h1, h2, h3, h4,
p, ul, ol, figure, blockquote {
  margin: 0;
}

ul, ol {
  padding: 0;
  list-style: none;
}

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

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

/* ---------- 2. 设计变量 ---------- */
:root {
  --ink: #07090C;
  --ink-2: #0D1520;
  --panel: #111C26;
  --cyan: #20E3FF;
  --orange: #FF5A1F;
  --lime: #C8FF3D;
  --text: #E8F1F5;
  --muted: #9AAAB6;
  --line: #243843;
  --warm: #FFF1DF;

  --rail-w: 88px;
  --bar-h: 60px;
  --maxw: 1280px;
  --pad: clamp(20px, 4.2vw, 64px);
  --gap: clamp(16px, 2.4vw, 32px);

  --font-display: "Archivo Black", "Helvetica Neue", Helvetica, Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: "Inter", "Helvetica Neue", Helvetica, Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, "Courier New", monospace;

  --ease: cubic-bezier(.2, .7, .2, 1);
}

/* ---------- 3. 基础排版 ---------- */
body {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  color: var(--text);
  background-color: var(--ink);
  background-image:
    radial-gradient(900px 520px at 88% -8%, rgba(32, 227, 255, .08), transparent 68%),
    linear-gradient(90deg, rgba(36, 56, 67, .34) 1px, transparent 1px),
    linear-gradient(0deg, rgba(36, 56, 67, .34) 1px, transparent 1px);
  background-repeat: no-repeat, repeat, repeat;
  background-size: auto, 124px 124px, 124px 124px;
  padding-left: var(--rail-w);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection {
  background: var(--cyan);
  color: #04141A;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.12;
  color: var(--text);
}

h1 { font-size: clamp(34px, 5.2vw, 64px); }
h2 { font-size: clamp(25px, 3.4vw, 40px); }
h3 { font-size: clamp(19px, 2vw, 26px); }

p { max-width: 38em; }

a {
  color: var(--cyan);
  text-decoration: none;
}

strong { font-weight: 700; color: var(--warm); }

main {
  display: block;
  min-height: 60vh;
}

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

/* ---------- 4. 布局工具 ---------- */
.wrap {
  width: 100%;
  max-width: calc(var(--maxw) + var(--pad) * 2);
  margin-inline: auto;
  padding-inline: var(--pad);
}

.section {
  padding-block: clamp(48px, 6vw, 88px);
}

.section--tint {
  background: var(--ink-2);
  border-block: 1px solid var(--line);
}

.section-head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(24px, 3vw, 40px);
  max-width: 62ch;
}

.lead {
  font-size: clamp(17px, 1.6vw, 19px);
  line-height: 1.8;
  color: var(--muted);
  max-width: 38em;
}

.rule {
  height: 1px;
  border: 0;
  background: var(--line);
  margin: 0;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0 0 14px;
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--cyan);
}

.mono {
  font-family: var(--font-mono);
  letter-spacing: .02em;
}

.idx {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--orange);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--muted);
}

.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--cyan); }

.breadcrumb__sep { color: var(--line); }

.grid {
  display: grid;
  gap: var(--gap);
}

.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

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

/* ---------- 5. 通用组件 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 46px;
  padding: 0 20px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  white-space: nowrap;
  text-decoration: none;
  overflow: hidden;
  cursor: pointer;
  transition: background-color 160ms ease-out, border-color 160ms ease-out,
              color 160ms ease-out, transform 160ms ease-out;
}

.btn:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}

.btn:active { transform: translateY(1px); }

.btn--primary {
  background: var(--orange);
  border-color: var(--orange);
  color: #0A0C0E;
  font-weight: 700;
}

.btn--primary:hover {
  background: #FF7440;
  border-color: #FF7440;
  color: #0A0C0E;
}

.btn--ghost {
  border-color: rgba(32, 227, 255, .55);
  color: var(--cyan);
}

.btn--ghost:hover {
  background: rgba(32, 227, 255, .12);
  color: var(--cyan);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--muted);
}

.tag--cyan {
  color: var(--cyan);
  border-color: rgba(32, 227, 255, .45);
}

.tag--live {
  color: var(--lime);
  border-color: rgba(200, 255, 61, .45);
  background: rgba(200, 255, 61, .06);
}

.tag--live::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 10px rgba(200, 255, 61, .9);
  animation: ray-pulse 2.4s ease-in-out infinite;
}

.card {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  padding: clamp(20px, 2.6vw, 30px);
}

.card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

/* 图片容器：页面阶段在 .figure__media 内放 <img> */
.figure { margin: 0; }

.figure__media {
  position: relative;
  aspect-ratio: 16 / 10;
  background: #0B141D;
  border: 1px solid var(--line);
  overflow: hidden;
}

.figure__media::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(118deg, rgba(32, 227, 255, .16), transparent 58%),
    linear-gradient(180deg, transparent 58%, rgba(255, 90, 31, .14));
}

.figure__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(90deg, rgba(36, 56, 67, .9) 1px, transparent 1px),
    linear-gradient(0deg, rgba(36, 56, 67, .9) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: .45;
}

.figure__media img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.figure__cap {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--muted);
}

.figure--wide .figure__media { aspect-ratio: 21 / 9; }
.figure--tall .figure__media { aspect-ratio: 3 / 4; }

/* 滚动显现 */
[data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 260ms ease-out, transform 300ms var(--ease);
}

[data-reveal].is-in {
  opacity: 1;
  transform: none;
}

/* 滚动进度 */
.scroll-progress {
  position: fixed;
  z-index: 200;
  pointer-events: none;
  opacity: 0;
  transition: opacity 200ms ease-out;
}

.scroll-progress.is-visible { opacity: 1; }

.scroll-progress__fill {
  display: block;
  background: linear-gradient(180deg, var(--cyan), var(--lime));
}

@keyframes ray-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .45; transform: scale(.82); }
}

/* ---------- 6. 头部：侧边轨道 ---------- */
.skip-link {
  position: fixed;
  top: 0;
  left: calc(var(--rail-w) + 12px);
  z-index: 300;
  padding: 10px 18px;
  background: var(--cyan);
  color: #04141A;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  transform: translateY(-150%);
  transition: transform 160ms ease-out;
}

.skip-link:focus {
  transform: translateY(12px);
}

.site-header {
  position: fixed;
  inset: 0 auto 0 0;
  width: var(--rail-w);
  z-index: 120;
  display: flex;
  flex-direction: column;
  background: linear-gradient(180deg, #0A121A 0%, #07090C 58%);
  border-right: 1px solid var(--line);
  overflow: hidden;
  transition: width 260ms var(--ease), box-shadow 260ms var(--ease);
}

.site-header::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 1px;
  height: 120px;
  background: linear-gradient(180deg, var(--cyan), transparent);
}

.rail__brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: none;
  padding: 20px 16px 16px 20px;
  color: var(--text);
  text-decoration: none;
}

.rail__mark {
  flex: none;
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  background: var(--cyan);
  color: #04141A;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  line-height: 1;
  clip-path: polygon(0 0, 100% 0, 100% 72%, 72% 100%, 0 100%);
}

.rail__brandtext {
  font-family: var(--font-display);
  font-size: 14px;
  letter-spacing: .04em;
  white-space: nowrap;
  opacity: 0;
  transform: translateX(-6px);
  transition: opacity 180ms ease-out, transform 220ms var(--ease);
}

.rail__brandslash {
  color: var(--orange);
  margin: 0 6px;
}

.rail__brandcn {
  font-family: var(--font-body);
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--muted);
}

.rail__status {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: none;
  padding: 0 20px 16px;
  max-width: 100%;
  overflow: hidden;
}

.dot {
  flex: none;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 12px rgba(200, 255, 61, .85);
  animation: ray-pulse 2.4s ease-in-out infinite;
}

.rail__status-text {
  font-family: var(--font-mono);
  font-size: 10px;
  line-height: 1.5;
  letter-spacing: .04em;
  color: var(--muted);
  white-space: nowrap;
  opacity: 0;
  transition: opacity 180ms ease-out;
}

.site-nav {
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
  flex-direction: column;
  padding-top: 6px;
  margin-top: 2px;
  border-top: 1px solid var(--line);
}

.site-nav__scroll {
  flex: 1 1 auto;
  min-height: 0;
  overflow-x: hidden;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
}

.rail__list {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 10px 0;
}

.rail__link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 18px 10px 22px;
  color: var(--muted);
  text-decoration: none;
  transition: color 160ms ease-out, background-color 160ms ease-out;
}

.rail__link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: transparent;
  transition: background-color 160ms ease-out;
}

.rail__link:hover {
  color: var(--text);
  background-color: rgba(32, 227, 255, .06);
}

.rail__link:hover::before { background-color: var(--cyan); }

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

.rail__idx {
  flex: none;
  width: 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: #5C7280;
  transition: color 160ms ease-out;
}

.rail__link:hover .rail__idx { color: var(--cyan); }

.rail__label {
  font-size: 14px;
  line-height: 1.4;
  letter-spacing: .02em;
  white-space: nowrap;
  opacity: 0;
  transform: translateX(-8px);
  transition: opacity 180ms ease-out, transform 220ms var(--ease);
}

.rail__link[aria-current="page"] {
  color: var(--cyan);
  background-color: rgba(32, 227, 255, .07);
}

.rail__link[aria-current="page"]::before { background-color: var(--cyan); }

.rail__link[aria-current="page"] .rail__idx { color: var(--orange); }

.nav-quick { display: none; }

.rail__cta {
  flex: none;
  margin: 14px 14px 10px;
  height: 44px;
  min-height: 44px;
  padding: 0 8px;
  letter-spacing: .08em;
}

.rail__cta-short {
  display: none;
  font-family: var(--font-mono);
}

.rail__note {
  flex: none;
  padding: 0 20px 6px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .14em;
  color: #4E6673;
  white-space: nowrap;
  opacity: 0;
  transition: opacity 180ms ease-out;
}

.mobilebar { display: none; }

.mobilebar__brand {
  font-family: var(--font-display);
  font-size: 15px;
  letter-spacing: .04em;
  color: var(--text);
  text-decoration: none;
}

.mobilebar__slash {
  color: var(--orange);
  margin: 0 5px;
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  border: 1px solid var(--line);
  background: rgba(32, 227, 255, .05);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  transition: border-color 160ms ease-out, color 160ms ease-out;
}

.nav-toggle:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}

.nav-toggle__bars {
  position: relative;
  width: 16px;
  height: 1px;
  background: currentColor;
  transition: background-color 160ms ease-out;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 1px;
  background: currentColor;
  transition: transform 200ms var(--ease), top 200ms var(--ease);
}

.nav-toggle__bars::before { top: -5px; }
.nav-toggle__bars::after { top: 5px; }

.nav-toggle.is-open .nav-toggle__bars { background: transparent; }
.nav-toggle.is-open .nav-toggle__bars::before { top: 0; transform: rotate(45deg); }
.nav-toggle.is-open .nav-toggle__bars::after { top: 0; transform: rotate(-45deg); }

/* ---------- 7. 桌面轨道展开 ---------- */
@media (min-width: 1024px) {
  html { scrollbar-gutter: stable; }

  .site-header:hover,
  .site-header:focus-within {
    width: 272px;
    box-shadow: 32px 0 80px rgba(0, 0, 0, .7);
  }

  .site-header:hover .rail__brandtext,
  .site-header:focus-within .rail__brandtext,
  .site-header:hover .rail__status-text,
  .site-header:focus-within .rail__status-text,
  .site-header:hover .rail__note,
  .site-header:focus-within .rail__note {
    opacity: 1;
    transform: none;
  }

  .site-header:hover .rail__label,
  .site-header:focus-within .rail__label {
    opacity: 1;
    transform: none;
  }

  .rail__cta-long { display: none; }
  .rail__cta-short { display: inline; }

  .site-header:hover .rail__cta-long,
  .site-header:focus-within .rail__cta-long { display: inline; }

  .site-header:hover .rail__cta-short,
  .site-header:focus-within .rail__cta-short { display: none; }

  .scroll-progress {
    top: 0;
    left: 0;
    width: 3px;
    height: 100vh;
  }

  .scroll-progress__fill {
    width: 100%;
    height: 100%;
    transform-origin: top center;
    transform: scaleY(var(--p, 0));
  }
}

/* ---------- 8. 移动与平板 ---------- */
@media (max-width: 1023px) {
  :root { --rail-w: 0px; }

  body { font-size: 16px; }

  .skip-link { left: 12px; }

  .site-header {
    position: sticky;
    inset: auto;
    top: 0;
    width: 100%;
    height: auto;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    background: #080C11;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    overflow: visible;
    transition: none;
  }

  .site-header:hover,
  .site-header:focus-within {
    width: 100%;
    box-shadow: none;
  }

  .site-header::after { display: none; }

  .rail__brand { display: none; }

  .mobilebar {
    order: 1;
    flex: 1 0 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--bar-h);
    padding-inline: 20px;
  }

  .rail__status {
    order: 2;
    flex: 1 0 100%;
    height: 28px;
    padding: 0 20px;
    background: rgba(13, 21, 32, .92);
    border-top: 1px solid var(--line);
  }

  .rail__status-text {
    opacity: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    letter-spacing: .06em;
  }

  .site-nav {
    position: fixed;
    top: calc(var(--bar-h) + 28px);
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    z-index: 110;
    padding: 22px 20px 32px;
    margin: 0;
    background: var(--ink);
    border-top: 1px solid rgba(32, 227, 255, .28);
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 200ms ease-out, transform 240ms var(--ease), visibility 200ms;
  }

  .site-header[data-open] .site-nav {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .site-nav__scroll { overflow: visible; }

  .rail__list {
    gap: 0;
    padding: 0;
  }

  .rail__link {
    gap: 16px;
    padding: 16px 6px;
    border-bottom: 1px solid var(--line);
  }

  .rail__link::before { display: none; }

  .rail__idx {
    width: 24px;
    font-size: 12px;
  }

  .rail__label {
    opacity: 1;
    transform: none;
    font-size: 19px;
    font-weight: 600;
    white-space: normal;
  }

  .rail__link[aria-current="page"] { background: rgba(32, 227, 255, .06); }

  .nav-quick {
    display: grid;
    gap: 10px;
    margin-top: 24px;
  }

  .nav-quick__item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    border: 1px solid var(--line);
    color: var(--text);
    font-size: 14px;
    transition: border-color 160ms ease-out, color 160ms ease-out;
  }

  .nav-quick__item:hover,
  .nav-quick__item:focus-visible {
    border-color: var(--cyan);
    color: var(--cyan);
  }

  .nav-quick__idx {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--orange);
  }

  .rail__cta {
    align-self: stretch;
    margin: 24px 0 0;
    height: 52px;
    min-height: 52px;
    font-size: 13px;
  }

  .rail__cta-long { display: inline; }
  .rail__cta-short { display: none; }

  .rail__note { display: none; }

  html[data-nav-open] { overflow: hidden; }

  .scroll-progress {
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
  }

  .scroll-progress__fill {
    width: 100%;
    height: 100%;
    transform-origin: left center;
    transform: scaleX(var(--p, 0));
  }
}

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

@media (max-width: 640px) {
  .grid--2,
  .grid--3 { grid-template-columns: minmax(0, 1fr); }
}

/* ---------- 9. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(60px, 8vw, 110px);
  background: linear-gradient(180deg, #0A1119 0%, #05070A 72%);
  border-top: 1px solid var(--line);
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan) 0%, rgba(32, 227, 255, .18) 38%, transparent 62%, var(--orange) 100%);
}

.site-footer::after {
  content: "";
  position: absolute;
  top: -160px;
  right: -90px;
  width: 360px;
  height: 360px;
  background: radial-gradient(circle, rgba(255, 241, 223, .10), transparent 66%);
  pointer-events: none;
}

.footer__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) repeat(3, minmax(0, .75fr));
  gap: clamp(28px, 4vw, 56px);
  padding-block: clamp(44px, 6vw, 76px);
}

.footer__logo {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  font-family: var(--font-display);
  font-size: clamp(28px, 3.2vw, 40px);
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1;
  color: var(--text);
  text-decoration: none;
}

.footer__logoslash { color: var(--orange); }

.footer__logocn {
  font-family: var(--font-body);
  font-size: .42em;
  font-weight: 600;
  letter-spacing: .34em;
  color: var(--muted);
}

.footer__tagline {
  margin-top: 16px;
  max-width: 26ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.footer__coord {
  margin-top: 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: #4F6875;
}

.footer__col-title {
  margin-bottom: 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.footer__links {
  display: grid;
  gap: 12px;
}

.footer__link {
  position: relative;
  display: inline-block;
  padding-left: 0;
  font-size: 15px;
  color: var(--muted);
  text-decoration: none;
  transition: color 160ms ease-out, padding-left 200ms var(--ease);
}

.footer__link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 0;
  height: 1px;
  background: var(--orange);
  transition: width 200ms var(--ease);
}

.footer__link:hover,
.footer__link:focus-visible {
  color: var(--text);
  padding-left: 14px;
}

.footer__link:hover::before,
.footer__link:focus-visible::before { width: 9px; }

.footer__contact {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 250px), 1fr));
  gap: clamp(18px, 2.4vw, 36px);
  padding-block: 28px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.footer__label {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: #59707D;
}

.footer__value {
  display: block;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text);
  overflow-wrap: anywhere;
}

.footer__value--mono {
  font-family: var(--font-mono);
  letter-spacing: .02em;
}

.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 8px;
  padding: 4px 10px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .12em;
  transition: border-color 160ms ease-out, color 160ms ease-out, background-color 160ms ease-out;
}

.copy-btn:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}

.copy-btn.is-done {
  border-color: var(--lime);
  color: var(--lime);
}

.footer__base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 28px;
  padding-block: 22px 26px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: #546B78;
}

.footer__legal { margin: 0; max-width: none; }
.footer__base-note { margin: 0; max-width: none; }

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

@media (max-width: 560px) {
  .footer__inner { grid-template-columns: minmax(0, 1fr); gap: 32px; }
  .footer__tagline { max-width: none; }
  .footer__base { flex-direction: column; align-items: flex-start; }
}

/* ---------- 10. 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }

  [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }
}