/* ============================================================
   365电玩城 · 规则档案室 /assets/site.css
   共享外壳与通用组件；页面专属布局由各自页面 CSS 承接
   ============================================================ */

/* ---------- 1. 设计令牌 ---------- */
:root {
  --ink: #0B0B14;
  --ink-2: #161225;
  --ink-3: #120F1E;
  --paper: #F3EBDD;
  --violet: #8B5CF6;
  --violet-soft: #C4B5FD;
  --blue: #2D9CFF;
  --amber: #F5B942;
  --cyan: #35E0D0;
  --glass: #2A2440;
  --muted: #B9B2C9;
  --mint: #4ADE80;

  --line: rgba(139, 92, 246, 0.28);
  --line-soft: rgba(243, 235, 221, 0.12);
  --line-violet-strong: rgba(139, 92, 246, 0.55);

  --font-display: "ZCOOL QingKe HuangYou", "站酷庆科黄油体", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;

  --radius: 6px;
  --shell-max: 1320px;
  --pad-x: clamp(18px, 4vw, 48px);
  --shadow-deep: 0 30px 70px -40px rgba(0, 0, 0, 0.9);

  color-scheme: dark;
}

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

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

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

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

ul, ol { padding: 0; }

body {
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

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

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

button { font: inherit; color: inherit; }

::selection {
  background: var(--amber);
  color: #1A1206;
}

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

/* ---------- 3. 中文排版与标题 ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.16;
  letter-spacing: 0.01em;
  color: var(--paper);
}

h1 { font-size: clamp(2rem, 3.4vw, 3.4rem); }
h2 { font-size: clamp(1.5rem, 2.2vw, 2.3rem); }
h3 { font-size: clamp(1.1rem, 1.5vw, 1.35rem); }

p { line-height: 1.75; }

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

/* ---------- 4. 布局工具 ---------- */
.container {
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--pad-x);
}

.container--wide { max-width: 1600px; }

.section { padding-block: clamp(48px, 7vw, 96px); }
.section--tight { padding-block: clamp(30px, 4vw, 56px); }

.section-head {
  display: grid;
  gap: 12px;
  max-width: 720px;
  margin-bottom: clamp(24px, 3vw, 40px);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: currentColor;
}

.display {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 4vw, 4.8rem);
  line-height: 1.04;
  letter-spacing: 0.01em;
  color: var(--paper);
  text-shadow: 0 0 34px rgba(139, 92, 246, 0.38);
}

.lede {
  max-width: 62ch;
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.8;
  color: var(--muted);
}

.prose { max-width: 72ch; font-size: 17px; }
.prose > * + * { margin-top: 1em; }
.prose a { color: var(--blue); text-decoration: underline; text-underline-offset: 3px; }
.prose a:hover { color: var(--amber); }

.stack { display: grid; gap: clamp(12px, 1.6vw, 20px); }

.hairline {
  height: 1px;
  border: 0;
  margin-block: clamp(24px, 4vw, 48px);
  background: linear-gradient(90deg, rgba(139, 92, 246, 0), rgba(139, 92, 246, 0.6), rgba(245, 185, 66, 0.5), rgba(139, 92, 246, 0));
}

/* ---------- 5. 栅格 ---------- */
.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 28px);
}

.span-4, .span-5, .span-6, .span-7, .span-8, .span-12 { grid-column: span 12; }

@media (min-width: 880px) {
  .span-4 { grid-column: span 4; }
  .span-5 { grid-column: span 5; }
  .span-6 { grid-column: span 6; }
  .span-7 { grid-column: span 7; }
  .span-8 { grid-column: span 8; }
  .span-12 { grid-column: span 12; }
}

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border: 1px solid transparent;
  border-radius: 4px;
  background: transparent;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 0.02em;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.btn--primary {
  background: var(--blue);
  color: #05101C;
  box-shadow: 0 0 0 1px rgba(45, 156, 255, 0.45), 0 10px 26px -14px rgba(45, 156, 255, 0.9);
}
.btn--primary:hover { background: #57B3FF; transform: translateY(-1px); }

.btn--ghost {
  border-color: rgba(243, 235, 221, 0.24);
  background: rgba(42, 36, 64, 0.45);
  color: var(--paper);
}
.btn--ghost:hover {
  border-color: var(--violet);
  background: rgba(139, 92, 246, 0.22);
  color: #FFFFFF;
}

.btn--amber {
  background: var(--amber);
  color: #1A1206;
  box-shadow: 0 10px 26px -16px rgba(245, 185, 66, 0.9);
}
.btn--amber:hover { background: #FFCB63; transform: translateY(-1px); }

.btn--quiet {
  padding: 6px 0;
  border: 0;
  background: none;
  color: var(--blue);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.btn--quiet:hover { color: var(--amber); }

.btn:active { transform: translateY(0); }

/* ---------- 7. 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 9px;
  border: 1px solid currentColor;
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  line-height: 1.4;
}

.tag--purple { color: #DCD2FF; background: rgba(139, 92, 246, 0.18); border-color: rgba(139, 92, 246, 0.55); }
.tag--blue   { color: #BFE0FF; background: rgba(45, 156, 255, 0.16); border-color: rgba(45, 156, 255, 0.5); }
.tag--amber  { color: #FFE1A3; background: rgba(245, 185, 66, 0.16); border-color: rgba(245, 185, 66, 0.5); }
.tag--cyan   { color: #B7FFF8; background: rgba(53, 224, 208, 0.14); border-color: rgba(53, 224, 208, 0.5); }
.tag--mint   { color: #C7F9D8; background: rgba(74, 222, 128, 0.14); border-color: rgba(74, 222, 128, 0.5); }

.panel--paper .tag--purple { color: #4C1D95; background: rgba(139, 92, 246, 0.16); border-color: rgba(76, 29, 149, 0.35); }
.panel--paper .tag--blue   { color: #0B4E86; background: rgba(45, 156, 255, 0.16); border-color: rgba(11, 78, 134, 0.35); }
.panel--paper .tag--amber  { color: #7A4E00; background: rgba(245, 185, 66, 0.24); border-color: rgba(122, 78, 0, 0.35); }
.panel--paper .tag--cyan   { color: #0A5C58; background: rgba(53, 224, 208, 0.18); border-color: rgba(10, 92, 88, 0.35); }
.panel--paper .tag--mint   { color: #14532D; background: rgba(74, 222, 128, 0.2); border-color: rgba(20, 83, 45, 0.35); }

/* ---------- 8. 面板 ---------- */
.panel {
  padding: clamp(20px, 3vw, 36px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(22, 18, 37, 0.72);
}

.panel--paper {
  background: var(--paper);
  color: var(--ink-2);
  border-color: rgba(11, 11, 20, 0.12);
  box-shadow: var(--shadow-deep);
}
.panel--paper :is(h1, h2, h3, h4) { color: var(--ink); }
.panel--paper .lede { color: #4A4258; }

.panel--glass {
  background: rgba(42, 36, 64, 0.55);
  border-color: var(--line-soft);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.panel__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line-violet-strong);
}
.panel--paper .panel__head { border-bottom-color: rgba(11, 11, 20, 0.18); }

.panel__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 1.8vw, 1.5rem);
}

/* ---------- 9. 索引表 ---------- */
.index-list {
  display: grid;
  margin: 0;
  padding: 0;
  list-style: none;
}

.index-list__item {
  display: grid;
  grid-template-columns: 3.2em minmax(0, 1fr) auto;
  gap: 12px;
  align-items: baseline;
  padding: 12px 0;
  border-bottom: 1px solid rgba(139, 92, 246, 0.2);
}
.index-list__item a { color: var(--paper); }
.index-list__item a:hover { color: var(--cyan); }

.index-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

/* ---------- 10. 面包屑 ---------- */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.breadcrumbs__link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.breadcrumbs__link:hover { border-bottom-color: currentColor; }
.breadcrumbs__sep { opacity: 0.55; }
.breadcrumbs__current { color: var(--paper); }

/* ---------- 11. 响应式图片容器基座 ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(145deg, #1B1630 0%, #0B0B14 70%),
    var(--ink);
}

.media--wide   { aspect-ratio: 21 / 9; }
.media--square { aspect-ratio: 1 / 1; }
.media--tall   { aspect-ratio: 3 / 4; }

.media__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media__slot {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(243, 235, 221, 0.38);
  background-image:
    linear-gradient(rgba(139, 92, 246, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(139, 92, 246, 0.12) 1px, transparent 1px);
  background-size: 32px 32px;
}

.media__caption {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* ---------- 12. 滚动显现 ---------- */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.65s ease, transform 0.7s cubic-bezier(0.22, 0.68, 0.28, 1);
  transition-delay: calc(var(--reveal-delay, 0) * 1ms);
  will-change: opacity, transform;
}

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

/* ---------- 13. 跳转链接 ---------- */
.skip-link {
  position: absolute;
  left: 12px;
  top: -72px;
  z-index: 200;
  padding: 10px 16px;
  border-radius: 4px;
  background: var(--amber);
  color: #1A1206;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  transition: top 0.2s ease;
}
.skip-link:focus { top: 12px; }

/* ---------- 14. 站点头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: linear-gradient(180deg, rgba(11, 11, 20, 0.86) 0%, rgba(11, 11, 20, 0.28) 62%, rgba(11, 11, 20, 0) 100%);
  border-bottom: 1px solid transparent;
  transition: background 0.28s ease, border-color 0.28s ease, box-shadow 0.28s ease;
}

.site-header.is-scrolled {
  background: rgba(22, 18, 37, 0.88);
  border-bottom-color: var(--line);
  box-shadow: 0 14px 44px -22px rgba(0, 0, 0, 0.95);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  backdrop-filter: blur(14px) saturate(140%);
}

.header-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  overflow: hidden;
  pointer-events: none;
}

.header-progress__bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan) 0%, var(--blue) 55%, var(--amber) 100%);
  box-shadow: 0 0 12px rgba(53, 224, 208, 0.65);
  transition: width 0.12s linear;
}

.header-shell {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  width: 100%;
  max-width: 1600px;
  margin-inline: auto;
  padding: 11px var(--pad-x);
}

/* 品牌署名 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  color: var(--paper);
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 5px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: #0B0B14;
  background: linear-gradient(140deg, var(--amber) 0%, #FFD98A 46%, var(--violet) 100%);
  box-shadow: 0 0 0 1px rgba(245, 185, 66, 0.5), 0 8px 22px -10px rgba(139, 92, 246, 0.95);
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand__name {
  font-family: var(--font-display);
  font-size: 17px;
  letter-spacing: 0.06em;
  color: var(--paper);
}

.brand__sub {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cyan);
}

/* 导航 */
.site-nav {
  display: none;
  order: 3;
  flex-basis: 100%;
  min-width: 0;
}

.site-nav[data-open] { display: block; }

.site-nav__list {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin: 0;
  padding: 10px 0 4px;
  list-style: none;
}

.site-nav__item { list-style: none; }

.site-nav__link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 10px;
  border-radius: 4px;
  color: var(--paper);
  font-size: 15px;
  text-decoration: none;
  transition: background 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.site-nav__link:hover {
  background: rgba(139, 92, 246, 0.16);
  color: #FFFFFF;
}

.site-nav__num {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--cyan);
  opacity: 0.85;
}

.site-nav__label { display: inline-block; }

.site-nav__link[aria-current="page"] {
  background: rgba(139, 92, 246, 0.2);
  color: #FFFFFF;
  box-shadow: inset 0 -2px 0 var(--amber);
}

.site-nav__link[aria-current="page"] .site-nav__num {
  color: var(--amber);
  opacity: 1;
}

.site-nav__note {
  margin-top: 6px;
  padding: 12px 10px 4px;
  border-top: 1px dashed var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

/* 右侧动作区 */
.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  order: 2;
  margin-left: auto;
}

.header-actions__link {
  display: none;
  padding-bottom: 2px;
  border-bottom: 1px solid rgba(53, 224, 208, 0.45);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--cyan);
  transition: color 0.2s ease, border-color 0.2s ease;
}
.header-actions__link:hover { color: var(--amber); border-bottom-color: var(--amber); }

.header-actions .btn { display: none; }

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border: 1px solid rgba(139, 92, 246, 0.45);
  border-radius: 4px;
  background: rgba(42, 36, 64, 0.55);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
}
.nav-toggle:hover { border-color: var(--amber); color: var(--amber); }

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 16px;
  height: 14px;
}
.nav-toggle__bars span {
  display: block;
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.22s ease;
}

.nav-toggle[aria-expanded="true"] {
  border-color: var(--amber);
  background: rgba(245, 185, 66, 0.12);
  color: var(--amber);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:first-child { transform: translateY(3px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:last-child { transform: translateY(-3px) rotate(-45deg); }

.nav-toggle__text { line-height: 1; }

@media (min-width: 640px) {
  .header-actions .btn--primary { display: inline-flex; }
}

@media (min-width: 760px) {
  .header-actions__link { display: inline-block; }
}

@media (min-width: 900px) {
  .header-actions .btn--ghost { display: inline-flex; }
}

@media (min-width: 1080px) {
  .header-shell { padding-block: 14px; }

  .site-nav,
  .site-nav[data-open] {
    display: flex;
    order: 2;
    flex: 1 1 auto;
    flex-basis: auto;
    justify-content: center;
  }

  .site-nav__list {
    flex-direction: row;
    align-items: center;
    gap: 2px;
    padding: 0;
  }

  .site-nav__link {
    padding: 9px 13px;
    font-size: 14px;
  }

  .site-nav__note { display: none; }

  .header-actions { order: 3; margin-left: 0; }

  .nav-toggle { display: none; }
}

/* ---------- 15. 站点页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 8vw, 104px);
  overflow: hidden;
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, #0B0B14 0%, #120F1E 38%, #0B0B14 100%);
  color: var(--muted);
}

.footer-glow {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(620px 300px at 10% 0%, rgba(139, 92, 246, 0.24), transparent 70%),
    radial-gradient(520px 280px at 88% 18%, rgba(45, 156, 255, 0.16), transparent 72%),
    radial-gradient(420px 240px at 50% 100%, rgba(245, 185, 66, 0.08), transparent 70%);
}

.footer-inner {
  position: relative;
  padding-block: clamp(40px, 5vw, 64px) 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 3vw, 36px);
}

.footer-brand {
  display: grid;
  gap: 14px;
  align-content: start;
}

.brand--footer .brand__mark { width: 34px; height: 34px; font-size: 11px; }
.brand--footer .brand__name { font-size: 16px; }

.footer-brand__line {
  max-width: 34ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.footer-brand__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.footer-col {
  display: grid;
  gap: 12px;
  align-content: start;
}

.footer-col__title {
  position: relative;
  margin: 0;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--paper);
}
.footer-col__title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 28px;
  height: 2px;
  background: var(--amber);
}

.footer-col__meta {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--muted);
  word-break: break-all;
}

.footer-list {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-list--contact { gap: 12px; }

.footer-link {
  display: inline-block;
  font-size: 14px;
  color: var(--muted);
  transition: color 0.2s ease, transform 0.2s ease;
}
.footer-link:hover { color: var(--cyan); transform: translateX(2px); }

.contact-line {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 8px;
  align-items: center;
  font-size: 13px;
}

.contact-line__label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
}

.contact-line__value {
  min-width: 0;
  color: var(--paper);
  word-break: break-word;
}

.copy-btn {
  padding: 4px 8px;
  border: 1px solid rgba(139, 92, 246, 0.4);
  border-radius: 3px;
  background: rgba(42, 36, 64, 0.6);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}
.copy-btn:hover { color: var(--amber); border-color: var(--amber); }
.copy-btn.is-copied {
  background: var(--mint);
  border-color: var(--mint);
  color: #0B0B14;
}

.footer-note {
  padding-left: 10px;
  border-left: 2px solid rgba(245, 185, 66, 0.5);
  font-size: 12px;
  line-height: 1.7;
  color: rgba(185, 178, 201, 0.85);
}

.footer-copy-status {
  min-height: 1.1em;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--mint);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: clamp(28px, 4vw, 44px);
  padding-top: 18px;
  border-top: 1px solid var(--line-soft);
}

.footer-legal__text {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: rgba(185, 178, 201, 0.85);
}

.footer-legal__links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-legal__link {
  border-bottom: 1px solid transparent;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted);
  transition: color 0.2s ease, border-color 0.2s ease;
}
.footer-legal__link:hover { color: var(--amber); border-bottom-color: rgba(245, 185, 66, 0.6); }

@media (min-width: 640px) {
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-brand { grid-column: 1 / -1; }
}

@media (min-width: 1080px) {
  .footer-grid { grid-template-columns: minmax(0, 1.5fr) repeat(4, minmax(0, 1fr)); }
  .footer-brand { grid-column: auto; }
}

/* ---------- 16. 减少动效 ---------- */
@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;
  }

  html.js [data-reveal],
  html.js [data-reveal].is-in {
    opacity: 1 !important;
    transform: none !important;
  }

  .btn:hover,
  .btn:active,
  .footer-link:hover {
    transform: none;
  }
}