/* =========================================================
   米博体育中文官方站 — /assets/site.css
   共享外壳：reset / tokens / 头部 / 页脚 / 通用组件
   ========================================================= */

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

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

body { margin: 0; }

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

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

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

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

a { color: inherit; }

/* ---------- 2. tokens ---------- */
:root {
  --ink: #0A1428;
  --ink-deep: #060D1C;
  --slate: #16233D;
  --steel: #2A3D63;
  --mint: #35F0C0;
  --mint-deep: #1C9E7F;
  --orange: #FF8A3D;
  --orange-deep: #B95A19;
  --paper: #EFE9DA;
  --paper-edge: #D8CFBB;
  --text: #F2F5F7;
  --muted: #A9B7CC;

  --font-display: "Archivo Narrow", "Roboto Condensed", "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --maxw: 1280px;
  --gutter: clamp(16px, 3.4vw, 40px);
  --header-h: 66px;

  --ease: cubic-bezier(.22, .61, .36, 1);
}

/* ---------- 3. base ---------- */
body {
  background-color: var(--ink);
  background-image: radial-gradient(rgba(42, 61, 99, .38) 1px, transparent 1px);
  background-size: 26px 26px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16.5px;
  line-height: 1.75;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  font-stretch: condensed;
  line-height: 1.08;
  letter-spacing: -.015em;
}

::selection { background: var(--mint); color: #04121A; }

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

/* ---------- 4. 容器与章节 ---------- */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  position: relative;
  padding-block: clamp(48px, 7vw, 96px);
}

.section--tight { padding-block: clamp(28px, 4vw, 52px); }

.section--band {
  background: var(--ink-deep);
  border-top: 1px solid var(--steel);
  border-bottom: 1px solid var(--steel);
}

.section--slate { background: var(--slate); }

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

.rule--accent {
  height: 2px;
  background: linear-gradient(90deg, var(--mint), rgba(53, 240, 192, 0) 78%);
}

.grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 28px);
}

.grid--5-7 { grid-template-columns: 5fr 7fr; }
.grid--7-5 { grid-template-columns: 7fr 5fr; }
.grid--4-8 { grid-template-columns: 4fr 8fr; }
.grid--8-4 { grid-template-columns: 8fr 4fr; }
.grid--auto { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

/* ---------- 5. 文字层级 ---------- */
.display-1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-stretch: condensed;
  font-size: clamp(38px, 7.4vw, 86px);
  line-height: .98;
  letter-spacing: -.03em;
}

.display-2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-stretch: condensed;
  font-size: clamp(28px, 4.2vw, 50px);
  line-height: 1.04;
  letter-spacing: -.02em;
}

.display-3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 2.4vw, 30px);
  line-height: 1.14;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--mint);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: currentColor;
  opacity: .85;
}

.lede {
  font-size: clamp(16px, 1.6vw, 18.5px);
  line-height: 1.7;
  color: #C9D4E3;
  max-width: 60ch;
}

.muted { color: var(--muted); }

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
}

.prose {
  max-width: 68ch;
  color: #DCE4EE;
}

.prose h2 {
  font-size: clamp(22px, 2.6vw, 32px);
  margin-top: 1.7em;
}

.prose h3 {
  font-size: clamp(18px, 2vw, 22px);
  margin-top: 1.5em;
}

.prose > :first-child { margin-top: 0; }
.prose p { margin-top: 1em; }

.prose ul {
  margin-top: 1em;
  display: grid;
  gap: .5em;
}

.prose li {
  position: relative;
  padding-left: 1.25em;
}

.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 6px;
  height: 6px;
  background: var(--mint);
  transform: rotate(45deg);
}

.prose a {
  color: var(--mint);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 240, 192, .4);
}

.prose a:hover { border-bottom-color: var(--mint); }

.prose strong { color: #FFFFFF; }

.quote {
  background: var(--paper);
  color: #14213A;
  border-left: 3px solid var(--orange);
  padding: 16px 20px;
  font-size: 15.5px;
  line-height: 1.8;
}

.quote cite {
  display: block;
  margin-top: 10px;
  font-style: normal;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: #6B6047;
}

.stack {
  position: relative;
  display: inline-block;
  background: var(--paper);
  color: #14213A;
  padding: 6px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  box-shadow: 6px 6px 0 rgba(42, 61, 99, .6);
}

/* ---------- 6. 卡片 / 标签 / 数据 ---------- */
.panel {
  position: relative;
  background: var(--slate);
  border: 1px solid var(--steel);
  padding: clamp(18px, 2.4vw, 28px);
}

.panel--flat { background: transparent; }

.panel--paper {
  background: var(--paper);
  color: #14213A;
  border-color: var(--paper-edge);
}

.panel--paper .panel__title { color: #6B6047; }
.panel--paper .panel__head { border-bottom-color: rgba(20, 33, 58, .18); }
.panel--paper .muted { color: #5C6C86; }

.panel__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  padding-bottom: 12px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--steel);
}

.panel__title {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted);
}

.cut-marks::before,
.cut-marks::after {
  content: "";
  position: absolute;
  width: 10px;
  height: 10px;
  border: 1px solid var(--mint);
  opacity: .75;
  pointer-events: none;
}

.cut-marks::before {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
}

.cut-marks::after {
  bottom: -1px;
  right: -1px;
  border-left: 0;
  border-top: 0;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  border: 1px solid var(--steel);
  color: var(--muted);
  background: rgba(10, 20, 40, .6);
  white-space: nowrap;
}

.tag--mint { border-color: var(--mint-deep); color: var(--mint); }
.tag--price { border-color: var(--orange-deep); color: var(--orange); }
.tag--paper { background: var(--paper); color: #14213A; border-color: var(--paper-edge); }

.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat__value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(22px, 3vw, 34px);
  font-weight: 700;
  line-height: 1;
  color: var(--mint);
}

.stat__value--price { color: var(--orange); }

.stat__label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted);
}

.price {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--orange);
}

.price__num {
  font-size: clamp(18px, 2.4vw, 26px);
  font-weight: 700;
}

.price__note {
  font-size: 12px;
  color: var(--muted);
}

.form-bar {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 1fr;
  gap: 6px;
}

.form-bar__seg {
  display: grid;
  place-items: center;
  height: 38px;
  border: 1px solid var(--mint-deep);
  background: linear-gradient(180deg, rgba(53, 240, 192, .3), rgba(53, 240, 192, .05));
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text);
}

.form-bar__seg--l {
  border-color: var(--orange-deep);
  background: linear-gradient(180deg, rgba(255, 138, 61, .32), rgba(255, 138, 61, .05));
}

.form-bar__seg--d {
  border-color: var(--steel);
  background: rgba(42, 61, 99, .5);
  color: var(--muted);
}

.timeline {
  position: relative;
  display: grid;
  gap: 22px;
  padding-left: 22px;
  border-left: 1px solid var(--steel);
}

.timeline__item { position: relative; }

.timeline__dot {
  position: absolute;
  left: -27px;
  top: 7px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 0 3px rgba(53, 240, 192, .16);
}

.timeline__date {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--muted);
}

.timeline__body { margin-top: 4px; }

/* ---------- 7. 图片容器 ---------- */
.figure {
  position: relative;
  overflow: hidden;
  background: var(--slate);
  border: 1px solid var(--steel);
}

.figure > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.figure--wide { aspect-ratio: 16 / 9; }
.figure--band { aspect-ratio: 21 / 9; }
.figure--tall { aspect-ratio: 4 / 5; }
.figure--square { aspect-ratio: 1 / 1; }

.figure--paper {
  background: var(--paper);
  border-color: var(--paper-edge);
}

.figure__cap {
  position: absolute;
  left: 10px;
  bottom: 10px;
  padding: 3px 8px;
  background: rgba(6, 13, 28, .86);
  border: 1px solid var(--steel);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ---------- 8. 按钮与面包屑 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 22px;
  border: 1px solid var(--steel);
  background: transparent;
  color: var(--text);
  font-size: 14px;
  letter-spacing: .08em;
  text-decoration: none;
  cursor: pointer;
  transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}

.btn:hover,
.btn:focus-visible {
  border-color: var(--mint);
  color: var(--mint);
}

.btn--primary {
  background: var(--mint);
  border-color: var(--mint);
  color: #04121A;
  font-weight: 700;
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background: var(--mint-deep);
  border-color: var(--mint-deep);
  color: #04121A;
}

.btn--ghost {
  border-color: rgba(169, 183, 204, .4);
  color: var(--muted);
}

.btn--price {
  border-color: var(--orange-deep);
  color: var(--orange);
}

.btn--price:hover,
.btn--price:focus-visible {
  background: rgba(255, 138, 61, .12);
  border-color: var(--orange);
  color: var(--orange);
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.crumbs {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted);
}

.crumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.crumbs li {
  display: flex;
  align-items: center;
  gap: 10px;
}

.crumbs li + li::before {
  content: "/";
  color: var(--steel);
}

.crumbs a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.crumbs a:hover,
.crumbs a:focus-visible {
  color: var(--mint);
  border-bottom-color: var(--mint);
}

.crumbs [aria-current="page"] { color: var(--text); }

/* ---------- 9. 头部数据带 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(6, 13, 28, .9);
  border-bottom: 1px solid var(--steel);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.skip-link {
  position: absolute;
  left: 12px;
  top: -72px;
  z-index: 200;
  padding: 10px 16px;
  background: var(--mint);
  color: #04121A;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
  text-decoration: none;
  transition: top .2s var(--ease);
}

.skip-link:focus { top: 12px; }

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: var(--header-h);
  transition: min-height .28s var(--ease);
}

.site-header.is-condensed .header-inner { min-height: 54px; }

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex: 0 0 auto;
}

.brand-mark {
  position: relative;
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--steel);
  background: linear-gradient(135deg, rgba(53, 240, 192, .22), rgba(53, 240, 192, 0) 62%);
}

.brand-mark-inner {
  width: 10px;
  height: 10px;
  background: var(--mint);
  transform: rotate(45deg);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 16px;
  letter-spacing: .01em;
  color: var(--text);
  white-space: nowrap;
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--muted);
  text-transform: uppercase;
  transition: opacity .24s var(--ease);
}

.site-header.is-condensed .brand-sub { opacity: .45; }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border: 1px solid var(--steel);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  cursor: pointer;
  order: 2;
}

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

.nav-toggle-bars {
  display: grid;
  gap: 4px;
  width: 16px;
}

.nav-toggle-bars span {
  display: block;
  height: 2px;
  background: var(--mint);
  transition: transform .22s var(--ease), opacity .22s var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.nav-toggle-label { line-height: 1; }

.site-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
}

.nav-item { position: relative; }

.nav-item + .nav-item { border-left: 1px solid rgba(42, 61, 99, .75); }

.nav-link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--muted);
  text-decoration: none;
  white-space: nowrap;
  transition: color .2s var(--ease), background .2s var(--ease);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 4px;
  height: 1px;
  background: var(--mint);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .26s var(--ease);
}

.nav-link:hover,
.nav-link:focus-visible { color: var(--text); }

.nav-link:hover::after,
.nav-link:focus-visible::after { transform: scaleX(1); }

.nav-link[aria-current="page"] {
  color: var(--text);
  background: linear-gradient(180deg, rgba(53, 240, 192, .12), rgba(53, 240, 192, 0));
}

.nav-link[aria-current="page"]::after { transform: scaleX(1); }

.nav-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--steel);
  flex: 0 0 auto;
  transition: background .2s var(--ease), box-shadow .2s var(--ease);
}

.nav-link:hover .nav-dot,
.nav-link:focus-visible .nav-dot { background: var(--mint); }

.nav-link[aria-current="page"] .nav-dot {
  background: var(--mint);
  box-shadow: 0 0 0 3px rgba(53, 240, 192, .18);
}

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

.nav-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: 14px;
  padding-left: 14px;
  border-left: 1px solid rgba(42, 61, 99, .75);
}

.nav-meta-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 3px rgba(255, 138, 61, .16);
}

.nav-meta-text {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--muted);
  text-transform: uppercase;
  white-space: nowrap;
}

.header-progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 100%;
  height: 2px;
  transform: scaleX(0);
  transform-origin: left center;
  background: linear-gradient(90deg, var(--mint), var(--orange));
  transition: transform .1s linear;
}

/* ---------- 10. 页脚 ---------- */
.site-footer {
  background: var(--ink-deep);
  border-top: 1px solid var(--steel);
}

.footer-top {
  display: grid;
  grid-template-columns: 1.15fr .85fr 1.35fr;
  gap: clamp(24px, 3.4vw, 56px);
  padding-block: clamp(36px, 5vw, 64px);
}

.footer-brand-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 2vw, 24px);
  letter-spacing: -.01em;
  color: var(--text);
}

.footer-brand-note {
  margin-top: 10px;
  max-width: 34ch;
  font-size: 14.5px;
  color: var(--muted);
}

.footer-title {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--mint);
  padding-bottom: 10px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--steel);
}

.footer-links {
  display: grid;
  gap: 10px;
}

.footer-links a {
  display: inline-block;
  font-size: 14.5px;
  color: #D6DEE9;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--mint);
  border-bottom-color: var(--mint);
}

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

.footer-contact-item {
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 12px;
  align-items: start;
}

.footer-contact-key {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--muted);
  padding-top: 2px;
}

.footer-contact-val {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--text);
  word-break: break-word;
}

.footer-strip {
  background: rgba(10, 20, 40, .72);
  border-top: 1px solid var(--steel);
}

.footer-strip-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px 24px;
  padding-block: 16px;
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.footer-legal a {
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.footer-legal a:hover,
.footer-legal a:focus-visible {
  color: var(--mint);
  border-bottom-color: var(--mint);
}

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--muted);
}

.footer-icp { color: var(--muted); }

.footer-year { color: var(--muted); }

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

/* ---------- 11. 显现动效 ---------- */
[data-reveal] {
  transition: opacity .55s var(--ease), transform .55s var(--ease);
}

.js-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
}

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

/* ---------- 12. 响应式 ---------- */
@media (max-width: 1024px) {
  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: block;
    background: var(--ink-deep);
    border-bottom: 1px solid var(--steel);
    box-shadow: 0 28px 56px rgba(3, 8, 18, .7);
    max-height: 0;
    visibility: hidden;
    overflow: hidden;
    transition: max-height .32s var(--ease), visibility .32s var(--ease);
  }

  .site-nav[data-open] {
    max-height: calc(100vh - var(--header-h));
    visibility: visible;
    overflow-y: auto;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
  }

  .nav-item + .nav-item {
    border-left: 0;
    border-top: 1px solid rgba(42, 61, 99, .6);
  }

  .nav-link {
    padding: 15px var(--gutter);
    font-size: 15px;
  }

  .nav-link::after { left: var(--gutter); right: var(--gutter); bottom: 8px; }

  .nav-meta {
    margin-left: 0;
    padding: 14px var(--gutter);
    border-left: 0;
    border-top: 1px solid rgba(42, 61, 99, .6);
  }

  .grid--5-7,
  .grid--7-5,
  .grid--4-8,
  .grid--8-4 { grid-template-columns: 1fr; }
}

@media (max-width: 880px) {
  .footer-top { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 720px) {
  body { font-size: 16px; }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-contact-item { grid-template-columns: 1fr; gap: 2px; }

  .footer-strip-inner { justify-content: flex-start; }

  .brand-name { font-size: 14.5px; }
  .brand-sub { letter-spacing: .16em; }
  .brand-mark { width: 30px; height: 30px; }

  .nav-toggle-label { display: none; }
}

@media (max-width: 600px) {
  .figure--wide,
  .figure--band { aspect-ratio: 3 / 2; }

  .btn { width: 100%; }
  .btn-group .btn { width: 100%; }
}

/* ---------- 13. 无障碍与降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
  }

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

  .site-nav[data-open] { transition: none !important; }
}