/* ============================================================
   竞博电竞站 · 共享样式 /assets/site.css
   深空黑底 + 电光青轨道 + 矿物色分区 + 纸张叠层
   ============================================================ */

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body, h1, h2, h3, h4, h5, p, ul, ol, li, figure, blockquote, dl, dd { margin: 0; padding: 0; }
ul, ol { list-style: none; }
img, svg, video { display: block; max-width: 100%; height: auto; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; width: 100%; }

/* ---------- tokens ---------- */
:root {
  --void: #0A0D12;
  --slate: #1C2229;
  --slate-deep: #12171D;
  --paper: #F2EDE4;
  --cyan: #2BE3D2;
  --cyan-soft: rgba(43, 227, 210, .16);
  --mist: #7A8C93;
  --moss: #4E6B4A;
  --clay: #C1663F;
  --magenta: #FF3D81;
  --violet: #8A5CFF;
  --text: #E6E1D8;
  --text-dim: #94A2A9;
  --line: rgba(122, 140, 147, .22);
  --line-strong: rgba(242, 237, 228, .16);
  --rail-w: 88px;
  --masthead-h: 64px;
  --pad-x: clamp(18px, 4vw, 48px);
  --wrap-max: 1280px;
  --font-display: "Arial Narrow", "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", system-ui, -apple-system, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "JetBrains Mono", Consolas, "Liberation Mono", monospace;
  --ease: cubic-bezier(.22, .7, .28, 1);
}

/* ---------- base ---------- */
html { scroll-behavior: smooth; }
body {
  min-height: 100vh;
  background-color: var(--void);
  background-image:
    linear-gradient(rgba(122, 140, 147, .055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(122, 140, 147, .055) 1px, transparent 1px);
  background-size: 68px 68px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16.5px;
  line-height: 1.8;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
}
@media (min-width: 1024px) { body { padding-left: var(--rail-w); } }
body.nav-open { overflow: hidden; }

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

.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;
}

/* ---------- 排版件 ---------- */
.display {
  font-family: var(--font-display);
  font-weight: 200;
  line-height: 1.02;
  letter-spacing: -.005em;
  color: var(--paper);
}
.display--xl { font-size: clamp(40px, 7.4vw, 96px); }
.display--lg { font-size: clamp(30px, 4.6vw, 60px); }
.index-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--mist);
}
.num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.lede { font-size: clamp(17px, 1.5vw, 19px); line-height: 1.75; color: var(--text); max-width: 46ch; }
.measure { max-width: 68ch; }
.rule { height: 1px; background: var(--line); border: 0; }
.accent-moss { border-left: 3px solid var(--moss); padding-left: 14px; }
.accent-clay { border-left: 3px solid var(--clay); padding-left: 14px; }
.note-block {
  border-left: 3px solid var(--clay);
  background: rgba(193, 102, 63, .07);
  padding: 14px 18px;
  font-size: 15px;
  color: var(--text-dim);
}

/* ---------- 布局 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap-max);
  margin: 0 auto;
  padding-left: var(--pad-x);
  padding-right: var(--pad-x);
}
.section { padding: clamp(40px, 6vw, 84px) 0; }
.section-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 12px 18px; margin-bottom: 26px; }
.section-title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(24px, 3vw, 38px);
  letter-spacing: .01em;
  color: var(--paper);
}
.grid { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: clamp(16px, 2vw, 28px); }
.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-5 { grid-column: span 5; }
.col-6 { grid-column: span 6; }
.col-7 { grid-column: span 7; }
.col-8 { grid-column: span 8; }
.col-9 { grid-column: span 9; }
.col-12 { grid-column: span 12; }
@media (max-width: 1024px) {
  .col-3, .col-4, .col-5 { grid-column: span 6; }
}
@media (max-width: 680px) {
  .col-3, .col-4, .col-5, .col-6, .col-7, .col-8, .col-9 { grid-column: span 12; }
}

/* ---------- 面包屑 ---------- */
.crumbs {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .16em; color: var(--mist);
}
.crumbs li { display: flex; align-items: center; gap: 8px; }
.crumbs li + li::before { content: "/"; color: rgba(122, 140, 147, .5); }
.crumbs a:hover { color: var(--cyan); }
.crumbs [aria-current="page"] { color: var(--text); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 18px; border: 1px solid transparent;
  font-size: 13px; font-weight: 500; letter-spacing: .1em; line-height: 1.2;
  transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease), transform .2s var(--ease);
}
.btn--primary { background: var(--cyan); color: #04191B; border-color: var(--cyan); }
.btn--primary:hover { background: #7CF2E7; border-color: #7CF2E7; transform: translateY(-1px); }
.btn--ghost { border-color: var(--line-strong); color: var(--paper); }
.btn--ghost:hover { border-color: var(--cyan); color: var(--cyan); }

.copy-btn {
  flex: none; padding: 5px 10px; border: 1px solid rgba(43, 227, 210, .4);
  color: var(--cyan); font-size: 11px; letter-spacing: .12em;
  transition: background .2s var(--ease), color .2s var(--ease);
}
.copy-btn:hover { background: rgba(43, 227, 210, .12); }
.copy-btn.is-done { background: var(--cyan); color: #04191B; border-color: var(--cyan); }

.chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 14px; border: 1px solid var(--line);
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .14em;
  color: var(--text-dim); transition: .2s var(--ease);
}
.chip:hover { border-color: var(--cyan); color: var(--cyan); }
.chip[aria-pressed="true"] { background: rgba(43, 227, 210, .14); border-color: var(--cyan); color: var(--cyan); }

/* ---------- 标签 / 徽标 ---------- */
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 10px; border: 1px solid var(--line);
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .14em;
  color: var(--text-dim); white-space: nowrap;
}
.badge--version { color: var(--cyan); border-color: rgba(43, 227, 210, .42); }
.badge--cycle { color: var(--clay); border-color: rgba(193, 102, 63, .45); }

/* ---------- 跳转链接 ---------- */
.skip-link {
  position: absolute; left: 12px; top: -70px; z-index: 120;
  padding: 10px 16px; background: var(--cyan); color: #04191B;
  font-size: 13px; letter-spacing: .08em;
  transition: top .2s var(--ease);
}
.skip-link:focus { top: 12px; }

/* ---------- 头部 ---------- */
.site-header { position: relative; z-index: 90; }

.masthead {
  position: sticky; top: 0; z-index: 70;
  display: flex; align-items: center; gap: 14px;
  min-height: var(--masthead-h);
  padding: 0 var(--pad-x);
  background: rgba(10, 13, 18, .93);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.scroll-progress {
  position: absolute; left: 0; right: 0; bottom: -1px; height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--violet));
  transform: scaleX(0); transform-origin: left center;
}

.brand { display: inline-flex; align-items: center; gap: 12px; min-width: 0; }
.brand-mark {
  position: relative; flex: none; width: 30px; height: 30px;
  border: 1px solid var(--cyan);
  background: linear-gradient(135deg, transparent 45%, rgba(43, 227, 210, .9) 45%, rgba(43, 227, 210, .9) 55%, transparent 55%);
}
.brand-mark::after {
  content: ""; position: absolute; right: -3px; bottom: -3px;
  width: 7px; height: 7px; background: var(--magenta);
}
.brand-text { min-width: 0; }
.brand-name {
  display: block;
  font-family: var(--font-display); font-size: 16px; font-weight: 400;
  letter-spacing: .14em; color: var(--paper); white-space: nowrap;
}
.brand-line { display: block; font-size: 10.5px; letter-spacing: .16em; color: var(--mist); white-space: nowrap; }

.masthead-meta { display: flex; flex-wrap: wrap; gap: 8px; margin-left: auto; }
.masthead-actions { display: flex; align-items: center; gap: 10px; margin-left: 12px; }

.nav-toggle {
  display: none; align-items: center; gap: 8px;
  padding: 8px 12px; border: 1px solid var(--line-strong);
  color: var(--paper); font-size: 12px; letter-spacing: .14em;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.nav-toggle:hover { border-color: var(--cyan); color: var(--cyan); }
.nav-toggle[aria-expanded="true"] { color: var(--cyan); border-color: var(--cyan); }
.nav-toggle-bars {
  position: relative; flex: none; width: 18px; height: 13px;
  background: linear-gradient(currentColor, currentColor) center / 100% 1px no-repeat;
}
.nav-toggle-bars::before, .nav-toggle-bars::after {
  content: ""; position: absolute; left: 0; right: 0; height: 1px; background: currentColor;
}
.nav-toggle-bars::before { top: 1px; }
.nav-toggle-bars::after { bottom: 1px; }
.nav-toggle-text { white-space: nowrap; }

/* ---------- 侧边轨道 ---------- */
.rail {
  position: fixed; left: 0; top: 0; bottom: 0; z-index: 80;
  width: var(--rail-w);
  display: flex; flex-direction: column; align-items: center; gap: 12px;
  padding: calc(var(--masthead-h) + 14px) 0 22px;
  background: linear-gradient(180deg, #0E141A, #0A0D12 62%);
  border-right: 1px solid var(--line);
}
.rail::after {
  content: ""; position: absolute; top: 0; right: -1px; width: 1px; height: 100%;
  background: linear-gradient(180deg, var(--cyan), rgba(43, 227, 210, 0) 42%, rgba(193, 102, 63, .6));
  pointer-events: none;
}
.rail-title {
  font-family: var(--font-mono); font-size: 9.5px; letter-spacing: .2em;
  color: var(--mist); writing-mode: vertical-rl;
}
.rail-list { display: flex; flex-direction: column; align-items: center; width: 100%; gap: 2px; }
.rail-item { position: relative; display: flex; justify-content: center; width: 100%; }
.rail-link {
  position: relative; display: flex; flex-direction: column; align-items: center; gap: 6px;
  width: 100%; padding: 9px 0; color: var(--text-dim);
  transition: color .2s var(--ease);
}
.rail-link::before {
  content: ""; position: absolute; left: 0; top: 8px; bottom: 8px; width: 2px;
  background: var(--cyan); transform: scaleY(0); transform-origin: top center;
  transition: transform .25s var(--ease);
}
.rail-link:hover, .rail-link:focus-visible { color: var(--paper); }
.rail-link:hover::before, .rail-link:focus-visible::before { transform: scaleY(1); }
.rail-link[aria-current="page"] { color: var(--cyan); }
.rail-link[aria-current="page"]::before { transform: scaleY(1); }
.rail-index { font-family: var(--font-mono); font-size: 9.5px; letter-spacing: .14em; opacity: .75; }
.rail-label { writing-mode: vertical-rl; font-size: 12.5px; letter-spacing: .16em; line-height: 1.1; }

.rail-flyout {
  position: absolute; left: calc(100% + 10px); top: 0; z-index: 5;
  min-width: 210px; padding: 14px;
  background: var(--slate); border: 1px solid var(--line);
  opacity: 0; visibility: hidden; transform: translateX(-6px);
  transition: opacity .22s var(--ease), transform .22s var(--ease), visibility .22s;
}
.rail-item:hover .rail-flyout,
.rail-item:focus-within .rail-flyout { opacity: 1; visibility: visible; transform: none; }
.rail-flyout-title {
  margin-bottom: 8px;
  font-family: var(--font-mono); font-size: 10px; letter-spacing: .18em; color: var(--mist);
}
.rail-flyout-link {
  display: block; padding: 6px 0; font-size: 13.5px; color: var(--text);
  border-bottom: 1px dashed rgba(122, 140, 147, .25);
}
.rail-flyout-link:last-child { border-bottom: 0; }
.rail-flyout-link:hover { color: var(--cyan); }

.rail-foot {
  margin-top: auto;
  font-family: var(--font-mono); font-size: 10px; letter-spacing: .14em;
  color: var(--mist); writing-mode: vertical-rl;
}

.rail-scrim {
  position: fixed; inset: 0; z-index: 75;
  background: rgba(4, 7, 10, .74);
}
.rail-scrim[hidden] { display: none; }

/* ---------- 返回顶部（书签形） ---------- */
.to-top {
  position: fixed; right: 20px; bottom: 20px; z-index: 95;
  display: grid; place-items: center;
  width: 48px; height: 48px;
  background: rgba(28, 34, 41, .94);
  border: 1px solid var(--line-strong);
  color: var(--paper); font-size: 13px; letter-spacing: .08em;
  opacity: 0; visibility: hidden; transform: translateY(10px);
  transition: opacity .25s var(--ease), transform .25s var(--ease), visibility .25s, border-color .2s, color .2s;
}
.to-top::after {
  content: ""; position: absolute; left: 50%; bottom: -9px;
  width: 0; height: 0; transform: translateX(-50%);
  border-left: 8px solid transparent; border-right: 8px solid transparent;
  border-top: 9px solid rgba(28, 34, 41, .94);
}
.to-top.is-on { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { border-color: var(--cyan); color: var(--cyan); }

/* ---------- 卡片（纸张叠层 + 印刷角标） ---------- */
.card {
  position: relative;
  background: var(--slate);
  border: 1px solid var(--line);
  padding: 22px 22px 24px;
}
.card::before, .card::after { content: ""; position: absolute; width: 10px; height: 10px; pointer-events: none; }
.card::before { top: -1px; left: -1px; border-top: 2px solid var(--clay); border-left: 2px solid var(--clay); }
.card::after { bottom: -1px; right: -1px; border-bottom: 2px solid var(--clay); border-right: 2px solid var(--clay); }
.card-title {
  font-family: var(--font-display); font-weight: 300; font-size: 20px;
  letter-spacing: .02em; color: var(--paper);
}
.card-text { margin-top: 10px; font-size: 15px; color: var(--text-dim); }
.card--paper { background: var(--paper); border-color: rgba(10, 13, 18, .16); color: #191E24; }
.card--paper .card-title { color: #0A0D12; }
.card--paper .card-text { color: #4A555C; }
.card--data { border-color: rgba(138, 92, 255, .55); box-shadow: 0 14px 44px rgba(138, 92, 255, .16); }

/* ---------- 横向信息带 ---------- */
.band {
  position: relative;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(90deg, rgba(78, 107, 74, .18), rgba(28, 34, 41, .62) 42%, rgba(28, 34, 41, .62) 60%, rgba(193, 102, 63, .14));
}
.band-inner { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
.band-item {
  padding: 22px 24px; border-right: 1px solid var(--line);
  transition: transform .25s var(--ease), border-color .25s var(--ease);
}
.band-item:last-child { border-right: 0; }
.band-item:hover { transform: translateX(8px); border-color: rgba(43, 227, 210, .5); }
.band-value {
  font-family: var(--font-mono); font-size: clamp(22px, 3vw, 34px);
  letter-spacing: -.01em; color: var(--cyan);
}
.band-value--hot { color: var(--magenta); }
.band-label { display: block; margin-top: 6px; font-size: 11px; letter-spacing: .18em; color: var(--mist); }

/* ---------- 章节索引 ---------- */
.toc { display: flex; flex-wrap: wrap; gap: 4px 24px; }
.toc-link {
  position: relative; display: inline-flex; align-items: baseline; gap: 8px;
  padding: 6px 0; font-size: 13px; letter-spacing: .06em; color: var(--text-dim);
  transition: color .2s var(--ease);
}
.toc-link::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 1px;
  background: var(--cyan); transform: scaleX(0); transform-origin: left center;
  transition: transform .28s var(--ease);
}
.toc-link:hover { color: var(--paper); }
.toc-link.is-current { color: var(--cyan); }
.toc-link.is-current::after { transform: scaleX(1); }

/* ---------- 图片容器 ---------- */
.figure { position: relative; margin: 0; }
.figure-frame {
  position: relative; overflow: hidden; aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, #101820, var(--slate));
  border: 1px solid var(--line);
}
.figure-frame img { width: 100%; height: 100%; object-fit: cover; filter: saturate(.92) contrast(1.08); }
.figure-frame::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(120% 90% at 82% 8%, rgba(43, 227, 210, .16), transparent 56%),
    linear-gradient(180deg, rgba(10, 13, 18, 0), rgba(10, 13, 18, .55));
}
.figure-frame--empty {
  background-image: repeating-linear-gradient(135deg, rgba(122, 140, 147, .12) 0 12px, transparent 12px 24px);
}
.figure--wide .figure-frame { aspect-ratio: 21 / 9; }
.figure--portrait .figure-frame { aspect-ratio: 4 / 5; }
.figure-caption { margin-top: 10px; font-size: 12px; letter-spacing: .08em; color: var(--mist); }

/* ---------- 动效协议 ---------- */
.js [data-reveal] {
  opacity: 0; transform: translateY(18px);
  transition: opacity .6s var(--ease), transform .6s var(--ease);
}
.js [data-reveal].is-visible { opacity: 1; transform: none; }

.flip { display: inline-flex; }
.flip-char {
  display: inline-block; white-space: pre;
  opacity: 0; transform: translateY(-.45em) rotateX(-70deg); transform-origin: 50% 100%;
}
.flip.is-flipped .flip-char { animation: flipIn .5s var(--ease) forwards; animation-delay: calc(var(--i, 0) * 55ms); }
@keyframes flipIn {
  0% { opacity: 0; transform: translateY(-.45em) rotateX(-70deg); }
  60% { opacity: 1; }
  100% { opacity: 1; transform: none; }
}

/* ---------- 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 7vw, 96px);
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(28, 34, 41, .5), #080A0E 42%);
}
.footer-tape {
  display: flex; flex-wrap: wrap;
  border-bottom: 1px solid var(--line);
  background: repeating-linear-gradient(115deg, rgba(43, 227, 210, .07) 0 14px, transparent 14px 28px);
}
.tape-item {
  padding: 10px 22px;
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .2em; color: var(--mist);
  border-right: 1px solid var(--line);
}
.tape-item::before {
  content: ""; display: inline-block; width: 5px; height: 5px; margin-right: 10px;
  background: var(--cyan); vertical-align: middle;
}
.footer-main {
  display: grid; grid-template-columns: 1.1fr 2.2fr 1.3fr; gap: 36px;
  padding-top: 52px; padding-bottom: 44px;
}
.footer-brand .brand { align-items: flex-start; }
.brand--stack { display: flex; flex-direction: column; gap: 10px; }
.footer-slogan {
  margin-top: 16px;
  font-family: var(--font-display); font-size: 20px; font-weight: 300;
  letter-spacing: .06em; color: var(--paper);
}
.footer-hours { margin-top: 8px; font-family: var(--font-mono); font-size: 11px; letter-spacing: .14em; color: var(--mist); }

.footer-cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(112px, 1fr)); gap: 22px; }
.footer-col-title {
  margin-bottom: 14px; padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .18em;
  font-weight: 400; color: var(--paper);
}
.footer-links a {
  display: inline-block; padding: 5px 0; font-size: 14px; color: var(--text-dim);
  transition: color .2s var(--ease), transform .2s var(--ease);
}
.footer-links a:hover { color: var(--cyan); transform: translateX(4px); }
.footer-links a[aria-current="page"] { color: var(--cyan); }

.footer-contact { min-width: 0; }
.contact-list { display: flex; flex-direction: column; gap: 12px; }
.contact-item {
  display: flex; flex-wrap: wrap; align-items: center; gap: 10px;
  padding: 10px 12px; border: 1px solid var(--line);
  background: rgba(10, 13, 18, .5);
}
.contact-key { font-family: var(--font-mono); font-size: 10px; letter-spacing: .16em; color: var(--mist); }
.contact-value { flex: 1 1 auto; font-family: var(--font-mono); font-size: 13px; color: var(--text); word-break: break-word; }
.contact-item--wide .contact-value { font-family: var(--font-body); font-size: 13.5px; line-height: 1.6; }
.footer-note {
  margin-top: 14px; padding-left: 12px;
  border-left: 3px solid var(--clay);
  font-size: 12.5px; line-height: 1.7; color: var(--mist);
}
.footer-bottom {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px;
  padding-top: 20px; padding-bottom: 26px;
  border-top: 1px solid var(--line);
}
.footer-legal { font-family: var(--font-mono); font-size: 11px; letter-spacing: .12em; color: var(--mist); }

/* ---------- 响应式：头部与页脚 ---------- */
@media (max-width: 1180px) {
  .footer-main { grid-template-columns: 1fr 1.6fr; }
  .footer-contact { grid-column: 1 / -1; }
}
@media (max-width: 1023px) {
  .nav-toggle { display: inline-flex; }
  .rail {
    align-items: stretch; width: min(320px, 86vw);
    padding-top: calc(var(--masthead-h) + 18px);
    border-right: 1px solid var(--line-strong);
    box-shadow: 24px 0 60px rgba(0, 0, 0, .55);
    transform: translateX(-100%);
    transition: transform .3s var(--ease);
  }
  .rail[data-open] { transform: none; }
  .rail::after { display: none; }
  .rail-title, .rail-foot {
    writing-mode: horizontal-tb; padding: 0 20px; color: var(--mist);
  }
  .rail-foot { margin-top: auto; padding-bottom: 6px; }
  .rail-list { align-items: stretch; gap: 0; }
  .rail-item { justify-content: flex-start; }
  .rail-link {
    flex-direction: row; align-items: baseline; gap: 12px;
    padding: 13px 20px; border-bottom: 1px solid rgba(122, 140, 147, .12);
  }
  .rail-link::before { top: 0; bottom: 0; }
  .rail-label { writing-mode: horizontal-tb; font-size: 15px; letter-spacing: .08em; }
  .rail-flyout { display: none; }
}
@media (max-width: 900px) {
  .masthead-meta { display: none; }
}
@media (max-width: 860px) {
  .brand-line { display: none; }
}
@media (max-width: 720px) {
  .footer-main { grid-template-columns: 1fr; gap: 30px; }
  .footer-contact { grid-column: auto; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 560px) {
  .masthead-actions .btn--primary { display: none; }
  .to-top { right: 14px; bottom: 14px; width: 44px; height: 44px; }
  .tape-item { padding: 8px 14px; letter-spacing: .14em; }
}
@media (min-width: 1024px) and (max-height: 720px) {
  .rail-label { font-size: 11px; letter-spacing: .12em; }
  .rail-link { padding: 6px 0; }
  .rail-index { font-size: 9px; }
}

/* ---------- 降低动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .flip-char { opacity: 1; transform: none; }
  .js [data-reveal] { opacity: 1; transform: none; }
  .band-item:hover { transform: none; }
}