/* ============================================================
   /assets/site.css — 万能真人娱乐 共享外壳
   ============================================================ */

/* ---------- 1. Reset ---------- */
*, *::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, dl, dd, address { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
address { font-style: normal; }
table { border-collapse: collapse; }

/* ---------- 2. Tokens ---------- */
:root {
  --space: #070B1F;
  --night: #17112E;
  --ink: #08080C;
  --paper: #F3EADB;
  --paper-deep: #EDE2CE;
  --cyan: #55E6E8;
  --gold: #E8B45A;
  --mist: #A8B0CC;
  --magenta: #D8506A;
  --text: #E9E6F2;
  --hair: rgba(168, 176, 204, 0.20);
  --hair-soft: rgba(168, 176, 204, 0.11);
  --rail-w: 248px;
  --bar-h: 64px;
  --font-serif: "Songti SC", "Source Han Serif SC", "Noto Serif CJK SC", "SimSun", serif;
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "SFMono-Regular", ui-monospace, Menlo, Consolas, "Courier New", monospace;
}

/* ---------- 3. Base ---------- */
body {
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background-color: var(--space);
  background-image:
    radial-gradient(90rem 52rem at 10% -12%, rgba(85, 230, 232, 0.10), transparent 62%),
    radial-gradient(70rem 46rem at 102% 2%, rgba(232, 180, 90, 0.07), transparent 58%),
    linear-gradient(180deg, #070B1F 0%, #17112E 56%, #070B1F 100%);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.24;
  letter-spacing: 0.01em;
  color: var(--paper);
}
h1 { font-size: clamp(32px, 4.4vw, 44px); line-height: 1.16; }
h2 { font-size: clamp(26px, 3vw, 32px); }
h3 { font-size: clamp(20px, 2vw, 22px); }
h4 { font-size: 17px; letter-spacing: 0.04em; }

p { color: inherit; }
strong { color: var(--paper); font-weight: 700; }
code, kbd, samp { font-family: var(--font-mono); font-size: 0.92em; }

::selection { background: rgba(85, 230, 232, 0.28); color: #F7F3EA; }

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

/* ---------- 4. Utilities ---------- */
.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip-link {
  position: fixed;
  top: -72px; left: 16px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--paper);
  color: #0B0A14;
  font-weight: 700;
  font-size: 14px;
  border-radius: 2px;
  transition: top 180ms ease;
}
.skip-link:focus { top: 14px; }

.container {
  width: 100%;
  max-width: 1180px;
  margin-inline: auto;
  padding-inline: clamp(20px, 4vw, 48px);
}
.rule { height: 1px; border: 0; margin: 0; background: var(--hair); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--cyan);
}
.lede {
  font-size: clamp(16px, 1.35vw, 18px);
  line-height: 1.8;
  color: #CFCBE0;
}

/* ---------- 5. 顶部阅读进度 ---------- */
.progress-line {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 3px;
  z-index: 130;
  pointer-events: none;
  background: rgba(168, 176, 204, 0.14);
}
.progress-line__bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--gold));
  box-shadow: 0 0 12px rgba(85, 230, 232, 0.55);
}

/* ---------- 6. 头部：左侧轨道 ---------- */
.site-header {
  position: relative;
  z-index: 120;
}
.site-header.is-scrolled .rail {
  box-shadow: 0 22px 44px -34px rgba(0, 0, 0, 0.95);
}

.rail {
  position: fixed;
  top: 0; left: 0; bottom: 0;
  width: var(--rail-w);
  display: flex;
  flex-direction: column;
  padding: 22px 0 20px;
  border-right: 1px solid var(--hair);
  background-color: #08080C;
  background-image:
    linear-gradient(180deg, rgba(8, 8, 12, 0.96), rgba(11, 10, 22, 0.94)),
    repeating-linear-gradient(0deg, rgba(168, 176, 204, 0.055) 0 1px, transparent 1px 46px);
  z-index: 120;
}

.rail__top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding: 0 20px 20px;
  border-bottom: 1px solid var(--hair-soft);
}

.rail__brand {
  display: flex;
  align-items: flex-start;
  gap: 11px;
  min-width: 0;
}
.brand-mark {
  flex: 0 0 auto;
  width: 30px; height: 30px;
  border: 1px solid rgba(243, 234, 219, 0.34);
  background:
    linear-gradient(135deg, var(--cyan) 0 46%, transparent 46% 54%, var(--gold) 54% 100%);
  box-shadow: inset 0 0 16px rgba(85, 230, 232, 0.32);
  transition: box-shadow 260ms ease, border-color 260ms ease;
}
.rail__brand:hover .brand-mark {
  border-color: rgba(85, 230, 232, 0.7);
  box-shadow: inset 0 0 16px rgba(85, 230, 232, 0.55), 0 0 18px rgba(85, 230, 232, 0.35);
}
.brand-text { display: flex; flex-direction: column; gap: 5px; min-width: 0; }
.brand-name {
  font-family: var(--font-serif);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--paper);
  line-height: 1.1;
}
.brand-tagline {
  font-family: var(--font-mono);
  font-size: 10px;
  line-height: 1.5;
  letter-spacing: 0.12em;
  color: rgba(168, 176, 204, 0.78);
}

.rail__toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 8px 13px;
  border: 1px solid rgba(85, 230, 232, 0.45);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  background: rgba(85, 230, 232, 0.07);
  transition: background-color 200ms ease, border-color 200ms ease;
}
.rail__toggle::before {
  content: "";
  width: 16px; height: 2px;
  background: currentColor;
  box-shadow: 0 5px 0 currentColor, 0 -5px 0 currentColor;
}
.rail__toggle:hover { background: rgba(85, 230, 232, 0.16); border-color: var(--cyan); }
.rail__toggle-label { display: inline-block; }

.rail__nav {
  display: flex;
  flex-direction: column;
  flex: 1 1 auto;
  padding-top: 18px;
  min-height: 0;
}
.rail__nav-label {
  padding: 0 20px 10px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: rgba(168, 176, 204, 0.55);
}

.nav-track { display: flex; flex-direction: column; }
.nav-track__item { display: block; }

.nav-link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 11px 20px;
  border-left: 2px solid transparent;
  color: var(--mist);
  transition: color 200ms ease, background-color 200ms ease, border-color 200ms ease;
}
.nav-link__index {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: rgba(168, 176, 204, 0.55);
  transition: color 200ms ease;
}
.nav-link__label { font-size: 15px; font-weight: 500; letter-spacing: 0.04em; }
.nav-link:hover {
  color: var(--paper);
  background: rgba(85, 230, 232, 0.07);
  border-left-color: rgba(85, 230, 232, 0.45);
}
.nav-link[aria-current="page"] {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: linear-gradient(90deg, rgba(85, 230, 232, 0.15), rgba(85, 230, 232, 0) 88%);
}
.nav-link[aria-current="page"] .nav-link__index { color: var(--gold); }

/* 快捷入口：桌面吸附右上 */
.rail__actions {
  position: fixed;
  top: 22px; right: 26px;
  display: flex;
  gap: 10px;
  z-index: 125;
}
.quick-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  border: 1px solid var(--hair);
  background: rgba(17, 13, 34, 0.82);
  color: var(--paper);
  transition: color 200ms ease, border-color 200ms ease, background-color 200ms ease, transform 200ms ease;
}
.quick-link::after {
  content: "";
  width: 6px; height: 6px;
  background: currentColor;
  opacity: 0.7;
}
.quick-link--gold { color: var(--gold); border-color: rgba(232, 180, 90, 0.55); }
.quick-link--gold:hover { background: rgba(232, 180, 90, 0.16); border-color: var(--gold); transform: translateY(-1px); }
.quick-link--cyan { color: var(--cyan); border-color: rgba(85, 230, 232, 0.5); }
.quick-link--cyan:hover { background: rgba(85, 230, 232, 0.15); border-color: var(--cyan); transform: translateY(-1px); }

/* 轨道底部读数 */
.rail__readout {
  margin-top: auto;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin-inline: 20px;
  padding-top: 14px;
  border-top: 1px solid var(--hair-soft);
  font-family: var(--font-mono);
}
.rail__readout-label { font-size: 10px; letter-spacing: 0.2em; color: rgba(168, 176, 204, 0.6); }
.rail__readout-value { font-size: 14px; color: var(--cyan); letter-spacing: 0.04em; }

.nav-scrim { display: none; }

/* 主内容与页脚避让轨道 */
@media (min-width: 960px) {
  #main-content, .site-footer { margin-left: var(--rail-w); }
}
@media (min-width: 1400px) {
  :root { --rail-w: 272px; }
}

/* ---------- 7. 移动端：顶栏 + 抽屉 ---------- */
@media (max-width: 959px) {
  html { scroll-padding-top: calc(var(--bar-h) + 14px); }
  #main-content { padding-top: var(--bar-h); }

  .rail {
    top: 0; left: 0; right: 0; bottom: auto;
    width: auto;
    height: var(--bar-h);
    flex-direction: row;
    align-items: center;
    padding: 3px 16px 0;
    border-right: 0;
    border-bottom: 1px solid var(--hair);
    background-image:
      linear-gradient(180deg, rgba(8, 8, 12, 0.99), rgba(10, 10, 20, 0.96)),
      repeating-linear-gradient(90deg, rgba(168, 176, 204, 0.05) 0 1px, transparent 1px 44px);
  }
  .rail__top {
    width: 100%;
    align-items: center;
    padding: 0;
    border-bottom: 0;
  }
  .rail__brand { align-items: center; }
  .brand-mark { width: 26px; height: 26px; }
  .brand-name { font-size: 16px; letter-spacing: 0.06em; }
  .brand-tagline { display: none; }
  .rail__toggle { display: inline-flex; }

  .rail__nav {
    position: fixed;
    top: var(--bar-h);
    left: 0;
    bottom: 0;
    width: min(86vw, 340px);
    padding: 10px 0 26px;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    border-right: 1px solid var(--hair);
    background: linear-gradient(180deg, #0A0A16 0%, #17112E 100%);
    transform: translateX(-102%);
    transition: transform 260ms cubic-bezier(0.22, 0.7, 0.24, 1);
    z-index: 118;
  }
  .site-header[data-open] .rail__nav { transform: translateX(0); }

  .rail__actions {
    position: static;
    flex-direction: column;
    gap: 10px;
    margin: 20px 20px 0;
    padding-top: 18px;
    border-top: 1px solid var(--hair-soft);
  }
  .quick-link { justify-content: space-between; width: 100%; }

  .rail__readout { margin-top: auto; margin-inline: 20px; }

  .nav-scrim {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 117;
    background: rgba(4, 4, 10, 0.64);
    opacity: 0;
    pointer-events: none;
    transition: opacity 240ms ease;
  }
  .site-header[data-open] .nav-scrim { opacity: 1; pointer-events: auto; }

  body.nav-open { overflow: hidden; }
  .progress-line { left: 0; }
}

/* ---------- 8. 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 46px;
  padding: 12px 22px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.05em;
  border: 1px solid transparent;
  border-radius: 2px;
  transition: transform 200ms ease, background-color 200ms ease, border-color 200ms ease, color 200ms ease;
}
.btn--gold {
  background: linear-gradient(135deg, #F2C87E, #E8B45A 58%, #C9923F);
  color: #140D03;
  box-shadow: 0 12px 26px -18px rgba(232, 180, 90, 0.95);
}
.btn--gold:hover { transform: translateY(-2px); }
.btn--ghost {
  border-color: rgba(168, 176, 204, 0.34);
  background: rgba(23, 17, 46, 0.62);
  color: var(--paper);
}
.btn--ghost:hover { border-color: var(--cyan); color: var(--cyan); }

/* ---------- 9. 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: rgba(168, 176, 204, 0.8);
}
.breadcrumb__item { display: inline-flex; align-items: center; gap: 8px; }
.breadcrumb__item a:hover { color: var(--cyan); }
.breadcrumb__sep { color: rgba(85, 230, 232, 0.55); }
.breadcrumb [aria-current="page"] { color: var(--paper); }

/* ---------- 10. 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: 1px solid var(--hair);
  color: var(--mist);
}
.tag--cyan { color: var(--cyan); border-color: rgba(85, 230, 232, 0.42); background: rgba(85, 230, 232, 0.08); }
.tag--gold { color: var(--gold); border-color: rgba(232, 180, 90, 0.42); background: rgba(232, 180, 90, 0.08); }
.tag--magenta { color: #F0859B; border-color: rgba(216, 80, 106, 0.5); background: rgba(216, 80, 106, 0.12); }

/* ---------- 11. 网格与章节头 ---------- */
.grid { display: grid; gap: clamp(14px, 2vw, 22px); }
.grid--halves { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--thirds { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--tiles { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
@media (max-width: 880px) {
  .grid--halves, .grid--thirds { grid-template-columns: 1fr; }
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--hair);
  margin-bottom: clamp(18px, 3vw, 30px);
}
.section-head__index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--cyan);
}

/* ---------- 12. 纸面卡片 / 磁贴 / 折叠 ---------- */
.paper-card {
  position: relative;
  padding: clamp(20px, 3vw, 32px);
  border: 1px solid rgba(8, 8, 12, 0.14);
  border-radius: 3px;
  background: linear-gradient(160deg, #F7F0E3, var(--paper-deep));
  color: #1A1726;
  box-shadow: 0 28px 54px -44px rgba(0, 0, 0, 0.95);
}
.paper-card h2, .paper-card h3, .paper-card h4 { color: #120F1C; }
.paper-card p { color: #3A3550; }
.paper-card a { color: #2A2150; text-decoration: underline; text-underline-offset: 3px; }
.paper-card a:hover { color: #7A3E00; }

.tile {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(18px, 2.4vw, 26px);
  border: 1px solid var(--hair);
  border-radius: 3px;
  background: linear-gradient(150deg, rgba(44, 58, 107, 0.55), rgba(59, 46, 95, 0.45));
  overflow: hidden;
  transition: border-color 250ms ease, transform 250ms ease, box-shadow 250ms ease;
}
.tile::after {
  content: "";
  position: absolute;
  right: -70px; bottom: -90px;
  width: 190px; height: 190px;
  background: radial-gradient(circle, rgba(85, 230, 232, 0.30), transparent 70%);
  opacity: 0;
  transition: opacity 300ms ease;
  pointer-events: none;
}
.tile:hover, .tile:focus-within {
  border-color: rgba(85, 230, 232, 0.5);
  transform: translateY(-3px);
  box-shadow: 0 28px 52px -42px rgba(85, 230, 232, 0.9);
}
.tile:hover::after, .tile:focus-within::after { opacity: 1; }

.fold {
  border: 1px solid var(--hair);
  border-radius: 3px;
  background: rgba(12, 14, 30, 0.55);
}
.fold__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 18px;
  cursor: pointer;
  list-style: none;
  font-weight: 600;
  color: var(--paper);
}
.fold__summary::-webkit-details-marker { display: none; }
.fold__summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan);
  transition: transform 220ms ease;
}
.fold[open] .fold__summary::after { transform: rotate(45deg); }
.fold__body {
  padding: 0 18px 18px;
  font-size: 15px;
  color: var(--mist);
  animation: fold-in 220ms ease both;
}
@keyframes fold-in {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: none; }
}

/* ---------- 13. 图片容器基础规则 ---------- */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  min-height: 170px;
  border: 1px solid var(--hair);
  border-radius: 3px;
  background-image:
    radial-gradient(120% 120% at 16% 10%, rgba(85, 230, 232, 0.20), transparent 58%),
    radial-gradient(90% 90% at 88% 86%, rgba(232, 180, 90, 0.16), transparent 62%),
    linear-gradient(140deg, #141A38, #221838 52%, #0C1024);
}
.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.5;
  background-image:
    repeating-linear-gradient(0deg, rgba(168, 176, 204, 0.10) 0 1px, transparent 1px 32px),
    repeating-linear-gradient(90deg, rgba(168, 176, 204, 0.10) 0 1px, transparent 1px 32px);
}
.media-frame > img,
.media-frame > picture > img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame--wide { aspect-ratio: 16 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--tall { aspect-ratio: 4 / 5; }
.media-frame--paper {
  background-image: linear-gradient(150deg, #F7F0E3, #E7DCC7);
  border-color: rgba(8, 8, 12, 0.16);
}
.media-frame--paper::after { opacity: 0.22; }

/* ---------- 14. 滚动显现 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 520ms ease, transform 520ms ease;
}
[data-reveal].is-visible { opacity: 1; transform: none; }

/* ---------- 15. 页脚 ---------- */
.site-footer {
  position: relative;
  overflow: hidden;
  margin-top: clamp(48px, 7vw, 96px);
  padding: clamp(40px, 6vw, 72px) clamp(20px, 5vw, 64px) 0;
  border-top: 1px solid var(--hair);
  background: linear-gradient(180deg, #0A0A14 0%, #08080C 42%, #0B0918 100%);
  color: var(--mist);
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(58rem 24rem at 92% -6%, rgba(85, 230, 232, 0.09), transparent 68%),
    linear-gradient(115deg, rgba(232, 180, 90, 0.07) 0 14%, transparent 14.2% 100%);
}
.footer-shell {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.55fr);
  gap: clamp(28px, 4vw, 64px);
  max-width: 1180px;
  margin-inline: auto;
}
.footer-lead { display: flex; flex-direction: column; align-items: flex-start; gap: 12px; }
.footer-title {
  font-family: var(--font-serif);
  font-size: clamp(24px, 2.6vw, 30px);
  font-weight: 700;
  letter-spacing: 0.09em;
  color: var(--paper);
  line-height: 1.2;
}
.footer-desc { font-size: 15px; line-height: 1.8; color: rgba(168, 176, 204, 0.92); max-width: 34ch; }
.footer-lead__actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 6px; }
.footer-stamp {
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: rgba(168, 176, 204, 0.6);
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 36px);
}
.footer-col { min-width: 0; }
.footer-col__title {
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--paper);
  padding-bottom: 10px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--hair-soft);
}
.footer-list { display: flex; flex-direction: column; gap: 8px; }
.footer-link {
  display: inline-block;
  font-size: 14px;
  color: rgba(168, 176, 204, 0.92);
  transition: color 180ms ease, transform 180ms ease;
}
.footer-link:hover { color: var(--cyan); transform: translateX(2px); }
.footer-link[aria-current="page"] { color: var(--gold); }
.footer-link--sm { font-size: 13px; }

.footer-contact { display: flex; flex-direction: column; gap: 8px; }
.footer-contact__row {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 13.5px;
  line-height: 1.7;
}
.footer-contact__key {
  flex: 0 0 auto;
  min-width: 34px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: rgba(85, 230, 232, 0.85);
}
.footer-contact__value { color: rgba(233, 230, 242, 0.92); overflow-wrap: anywhere; }
.footer-contact__note {
  margin-top: 4px;
  font-size: 12.5px;
  line-height: 1.7;
  color: rgba(168, 176, 204, 0.68);
}

.footer-base {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  max-width: 1180px;
  margin: clamp(30px, 4vw, 48px) auto 0;
  padding: 18px 0 26px;
  border-top: 1px solid var(--hair-soft);
  font-size: 13px;
  color: rgba(168, 176, 204, 0.72);
}
.footer-copy { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.08em; }
.footer-legal { display: flex; flex-wrap: wrap; gap: 16px; }
.footer-icp { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.06em; color: rgba(168, 176, 204, 0.66); }

@media (max-width: 999px) {
  .footer-shell { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .footer-nav { grid-template-columns: 1fr; }
  .footer-col--contact { padding-top: 6px; }
  .footer-base { justify-content: flex-start; }
}
@media (min-width: 641px) and (max-width: 999px) {
  .footer-nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-col--contact { grid-column: 1 / -1; }
}

/* ---------- 16. 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
  .tile:hover, .tile:focus-within, .btn--gold:hover, .quick-link:hover, .footer-link:hover { transform: none; }
}