/* ==========================================================================
   必一体育登录 · 共享外壳样式  /assets/site.css
   夜场灯光下的档案库：墨场绿基底 + 荧光橙 / 电光蓝强调 + 锐利直角细线网格
   ========================================================================== */

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

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

body,
h1, h2, h3, h4, h5, h6,
p, ul, ol, li, figure, blockquote, dl, dd {
  margin: 0;
}

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

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

button, input, select, textarea { font: inherit; color: inherit; }

a { color: inherit; }

table { border-collapse: collapse; width: 100%; }

/* ---------- 2. 变量 ---------- */
:root {
  --c-field: #0B2B24;
  --c-stand: #123A33;
  --c-deep: #071A16;
  --c-orange: #FF6A1A;
  --c-blue: #2EA8FF;
  --c-wine: #5A1B2E;
  --c-indigo: #2A1F4A;
  --c-green: #4CE0A8;
  --c-amber: #FFC53D;
  --c-paper: #F2F5F1;
  --c-muted: #8FA8A0;
  --c-body: #D8E2DD;
  --c-on-accent: #10110F;

  --line: rgba(143, 168, 160, .22);
  --line-strong: rgba(143, 168, 160, .42);
  --line-orange: rgba(255, 106, 26, .55);
  --line-paper: rgba(242, 245, 241, .16);

  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 20px;
  --sp-5: 32px;
  --sp-6: 56px;
  --sp-7: 96px;

  --font-display: "Arial Narrow", "Helvetica Neue", Helvetica, Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-serif: "Songti SC", "Noto Serif SC", "Source Han Serif SC", "SimSun", Georgia, serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Menlo, Consolas, "Courier New", monospace;

  --w-max: 1280px;
  --w-narrow: 820px;
  --nav-h: 54px;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

/* ---------- 3. 基础排版 ---------- */
body {
  background-color: var(--c-field);
  color: var(--c-paper);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.8;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: .02em;
}

p { color: var(--c-body); }

strong { color: var(--c-paper); }

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

/* ---------- 4. 跳至正文 ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 300;
  padding: 10px 18px;
  background: var(--c-orange);
  color: var(--c-on-accent);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .1em;
  text-decoration: none;
  border: 1px solid var(--c-on-accent);
  transform: translateY(-200%);
  transition: transform .18s var(--ease);
}

.skip-link:focus {
  transform: translateY(0);
}

/* ---------- 5. 站点头部 ---------- */
.site-header {
  position: relative;
  z-index: 60;
  background-color: var(--c-field);
  background-image:
    repeating-radial-gradient(circle at 6% 150%, transparent 0 34px, rgba(143, 168, 160, .05) 34px 35px),
    repeating-radial-gradient(circle at 96% -40%, transparent 0 28px, rgba(46, 168, 255, .05) 28px 29px);
  border-top: 3px solid rgba(255, 106, 26, .18);
  border-bottom: 1px solid var(--line);
}

/* --- 刊头 --- */
.masthead {
  max-width: var(--w-max);
  margin: 0 auto;
  padding: var(--sp-5) var(--sp-5) var(--sp-4);
  max-height: 340px;
  overflow: hidden;
  transition:
    max-height .34s var(--ease),
    padding .34s var(--ease),
    opacity .24s var(--ease);
}

.masthead__inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: var(--sp-5);
  padding: var(--sp-4) 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.masthead__meta {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.masthead__meta--left {
  align-items: flex-start;
  text-align: left;
}

.masthead__meta--right {
  align-items: flex-end;
  text-align: right;
}

.mono-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--c-muted);
}

.masthead__brand { text-align: center; }

.brand-mark {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 40px;
  line-height: 1.15;
  letter-spacing: .1em;
  text-indent: .1em;
  color: var(--c-paper);
}

.brand-sub {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .3em;
  text-transform: uppercase;
  color: var(--c-blue);
}

.masthead__cta {
  display: inline-block;
  margin-top: 6px;
  padding: 8px 16px;
  border: 1px solid var(--c-orange);
  color: var(--c-orange);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .08em;
  text-decoration: none;
  transition: background-color .18s var(--ease), color .18s var(--ease);
}

.masthead__cta:hover,
.masthead__cta:focus-visible {
  background: var(--c-orange);
  color: var(--c-on-accent);
}

/* 滚动后刊头收合 */
.site-header[data-scrolled] .masthead {
  max-height: 0;
  padding-top: 0;
  padding-bottom: 0;
  opacity: 0;
}

/* --- 栏目条 --- */
.nav-bar {
  position: sticky;
  top: 0;
  z-index: 70;
  background: rgba(6, 22, 19, .95);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line-strong);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.nav-bar__inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-3);
  max-width: var(--w-max);
  min-height: var(--nav-h);
  margin: 0 auto;
  padding: 0 var(--sp-4);
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  justify-content: center;
  gap: 2px;
}

.nav-list a {
  display: block;
  padding: 15px 16px;
  color: var(--c-paper);
  font-size: 15px;
  letter-spacing: .06em;
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition:
    color .18s var(--ease),
    border-color .18s var(--ease),
    background-color .18s var(--ease);
}

.nav-list a:hover {
  color: var(--c-orange);
  background: rgba(255, 106, 26, .08);
}

.nav-list a[aria-current="page"] {
  color: var(--c-orange);
  border-bottom-color: var(--c-orange);
  background: linear-gradient(180deg, rgba(255, 106, 26, 0) 0%, rgba(255, 106, 26, .14) 100%);
}

.nav-bar__brand {
  display: none;
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: .1em;
  color: var(--c-paper);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  background: transparent;
  border: 1px solid var(--line-strong);
  color: var(--c-orange);
  cursor: pointer;
  transition: border-color .18s var(--ease), background-color .18s var(--ease);
}

.nav-toggle:hover { border-color: var(--c-orange); background: rgba(255, 106, 26, .1); }

.nav-toggle__bars {
  width: 18px;
  height: 9px;
  background-image:
    linear-gradient(currentColor, currentColor),
    linear-gradient(currentColor, currentColor),
    linear-gradient(currentColor, currentColor);
  background-size: 18px 1px, 18px 1px, 18px 1px;
  background-position: 0 0, 0 4px, 0 8px;
  background-repeat: no-repeat;
}

.nav-toggle__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  text-transform: uppercase;
}

/* ---------- 6. 滚动进度条（JS 注入） ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 200;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--c-orange), var(--c-amber));
  pointer-events: none;
}

/* ---------- 7. 站点页脚 ---------- */
.site-footer {
  background-color: var(--c-indigo);
  background-image: repeating-linear-gradient(
    90deg,
    rgba(242, 245, 241, .04) 0 1px,
    rgba(242, 245, 241, 0) 1px 72px
  );
  color: var(--c-paper);
  border-top: 2px solid var(--c-orange);
}

.footer-zone { border-bottom: 1px solid var(--line-paper); }

.footer-inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: var(--sp-5);
  max-width: var(--w-max);
  margin: 0 auto;
  padding: var(--sp-6) var(--sp-5) var(--sp-5);
}

.footer-brand__mark {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 28px;
  letter-spacing: .1em;
  color: var(--c-paper);
}

.footer-brand__line {
  margin: 12px 0 0;
  font-size: 15px;
  color: var(--c-paper);
}

.footer-brand__note {
  margin: 12px 0 0;
  max-width: 32em;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--c-muted);
}

.footer-title {
  margin: 0 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line-paper);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--c-orange);
}

.footer-list {
  display: grid;
  gap: 9px;
  font-size: 14px;
}

.footer-list li {
  position: relative;
  padding-left: 16px;
  color: var(--c-paper);
}

.footer-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .78em;
  width: 7px;
  height: 1px;
  background: var(--c-blue);
}

.footer-list--contact { gap: 14px; }

.footer-list--contact li { padding-left: 0; }

.footer-list--contact li::before { display: none; }

.footer-contact__item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.footer-contact__label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--c-muted);
}

.footer-contact__value {
  font-size: 14px;
  line-height: 1.6;
  color: var(--c-paper);
  word-break: break-word;
}

.footer-legal { background: rgba(5, 4, 16, .34); }

.footer-legal__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-3);
  max-width: var(--w-max);
  margin: 0 auto;
  padding: var(--sp-4) var(--sp-5);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 22px;
  font-size: 13.5px;
}

.footer-links a {
  color: var(--c-paper);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

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

.footer-copy {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--c-muted);
}

/* ---------- 8. 通用容器与网格 ---------- */
.container {
  width: 100%;
  max-width: var(--w-max);
  margin: 0 auto;
  padding: 0 var(--sp-5);
}

.container--narrow { max-width: var(--w-narrow); }

.prose {
  max-width: 34em;
  font-size: 16px;
  line-height: 1.8;
}

.grid {
  display: grid;
  gap: var(--sp-5);
}

.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--split { grid-template-columns: minmax(0, 7fr) minmax(0, 4fr); }

/* ---------- 9. 标题与文本 ---------- */
.heading-display,
.heading-xl,
.heading-lg {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: .02em;
  color: var(--c-paper);
}

.heading-display { font-size: clamp(40px, 6vw, 72px); }
.heading-xl { font-size: clamp(28px, 4vw, 48px); }
.heading-lg { font-size: clamp(22px, 3vw, 32px); }

.eyebrow {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .28em;
  text-transform: uppercase;
  color: var(--c-orange);
}

.link-inline {
  color: var(--c-blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(46, 168, 255, .4);
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.link-inline:hover,
.link-inline:focus-visible {
  color: var(--c-orange);
  border-bottom-color: var(--c-orange);
}

/* ---------- 10. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--c-paper);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .06em;
  text-decoration: none;
  cursor: pointer;
  transition:
    background-color .18s var(--ease),
    color .18s var(--ease),
    border-color .18s var(--ease);
}

.btn--primary {
  background: var(--c-orange);
  border-color: var(--c-orange);
  color: var(--c-on-accent);
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background: #FF8340;
  border-color: #FF8340;
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  background: rgba(46, 168, 255, .14);
  border-color: var(--c-blue);
  color: var(--c-paper);
}

/* ---------- 11. 面包屑 ---------- */
.breadcrumb {
  max-width: var(--w-max);
  margin: 0 auto;
  padding: var(--sp-4) var(--sp-5) 0;
}

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

.breadcrumb__list li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--line-strong);
}

.breadcrumb__list a {
  color: var(--c-blue);
  text-decoration: none;
}

.breadcrumb__list a:hover { text-decoration: underline; }

/* ---------- 12. 数据条 ---------- */
.data-bar {
  padding: var(--sp-4) var(--sp-5);
  border-top: 1px solid var(--c-orange);
  border-bottom: 1px solid var(--c-orange);
  background: linear-gradient(
    90deg,
    rgba(255, 106, 26, .12) 0%,
    rgba(255, 106, 26, .02) 44%,
    rgba(46, 168, 255, .1) 100%
  );
}

.data-bar__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--sp-4) var(--sp-6);
  max-width: var(--w-max);
  margin: 0 auto;
}

.data-bar__item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.data-bar__num {
  font-family: var(--font-mono);
  font-size: 28px;
  line-height: 1.1;
  letter-spacing: .04em;
  color: var(--c-paper);
}

.data-bar__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--c-muted);
}

/* ---------- 13. 珠宝色分区 ---------- */
.zone { padding: var(--sp-6) var(--sp-5); }
.zone--wine { background: var(--c-wine); }
.zone--indigo { background: var(--c-indigo); }
.zone--stand { background: var(--c-stand); }

.zone__inner {
  max-width: var(--w-max);
  margin: 0 auto;
}

/* ---------- 14. 卡片 ---------- */
.card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: var(--sp-4);
  background: var(--c-stand);
  border: 1px solid var(--line);
  border-left: 3px solid var(--c-blue);
  transition: border-color .2s var(--ease);
}

.card:hover { border-left-color: var(--c-orange); }

.card__meta {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--c-muted);
}

.card__title {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 22px;
  line-height: 1.35;
  letter-spacing: .02em;
  color: var(--c-paper);
}

.card__body {
  margin: 0;
  font-size: 15px;
  color: var(--c-body);
}

/* ---------- 15. 筛选 chips ---------- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--c-paper);
  font-size: 13.5px;
  line-height: 1.5;
  letter-spacing: .05em;
  cursor: pointer;
  transition:
    background-color .18s var(--ease),
    color .18s var(--ease),
    border-color .18s var(--ease);
}

.chip:hover { border-color: var(--c-blue); }

.chip[aria-pressed="true"],
.chip.is-active {
  background: var(--c-orange);
  border-color: var(--c-orange);
  color: var(--c-on-accent);
}

/* ---------- 16. 状态标签 ---------- */
.status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border: 1px solid currentColor;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  white-space: nowrap;
}

.status--live { color: var(--c-green); }
.status--pending { color: var(--c-amber); }
.status--update { color: var(--c-orange); }

.status--update.is-pulsing {
  animation: statusPulse .4s var(--ease) 1;
}

@keyframes statusPulse {
  0%, 100% { background: transparent; }
  50% { background: rgba(255, 106, 26, .32); }
}

/* ---------- 17. 图片容器 ---------- */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--c-stand);
  border: 1px solid var(--line);
}

.media-frame img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

.media-frame__cap {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 8px 12px;
  background: rgba(7, 26, 22, .84);
  color: var(--c-paper);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
}

/* ---------- 18. 索引轨道 ---------- */
.rail {
  position: sticky;
  top: calc(var(--nav-h) + 16px);
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: var(--sp-4) 0;
  border-left: 1px solid var(--line);
}

.rail__title {
  padding: 0 0 10px 16px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--c-muted);
}

.rail-link {
  display: block;
  padding: 8px 16px;
  border-left: 2px solid transparent;
  color: var(--c-paper);
  font-size: 14px;
  line-height: 1.6;
  text-decoration: none;
  transition:
    color .18s var(--ease),
    border-color .18s var(--ease),
    background-color .18s var(--ease);
}

.rail-link:hover {
  color: var(--c-orange);
  background: rgba(255, 106, 26, .08);
}

.rail-link[aria-current="true"] {
  color: var(--c-orange);
  border-left-color: var(--c-orange);
}

/* ---------- 19. 滚动显现 ---------- */
.js-ready [data-reveal] {
  opacity: 0;
  transform: translateY(8px);
}

.js-ready [data-reveal].is-visible {
  opacity: 1;
  transform: none;
  transition:
    opacity .5s var(--ease) var(--reveal-delay, 0ms),
    transform .5s var(--ease) var(--reveal-delay, 0ms);
}

/* ---------- 20. 响应式 ---------- */
@media (max-width: 1100px) {
  .nav-list a {
    padding: 15px 11px;
    font-size: 14px;
  }

  .footer-inner { gap: var(--sp-4); }
}

@media (max-width: 960px) {
  .grid--2,
  .grid--3,
  .grid--split { grid-template-columns: 1fr; }

  .footer-inner {
    grid-template-columns: 1fr 1fr;
    padding: var(--sp-6) var(--sp-4) var(--sp-5);
  }

  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  .masthead {
    padding: var(--sp-4) var(--sp-4) var(--sp-3);
    max-height: 260px;
  }

  .masthead__inner {
    grid-template-columns: 1fr;
    gap: var(--sp-3);
    padding: var(--sp-3) 0;
    text-align: center;
  }

  .masthead__meta { display: none; }

  .brand-mark { font-size: 26px; }

  .brand-sub {
    font-size: 10px;
    letter-spacing: .22em;
  }

  .nav-bar__inner {
    justify-content: space-between;
    padding: 0 var(--sp-3);
  }

  .nav-bar__brand { display: block; }

  .nav-toggle { display: inline-flex; }

  .nav-list { display: none; }

  .nav-bar[data-open] .nav-list {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: flex;
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0;
    padding: 6px 0 10px;
    background: #061613;
    border-bottom: 2px solid var(--c-orange);
    box-shadow: 0 20px 44px rgba(0, 0, 0, .55);
  }

  .nav-bar[data-open] .nav-list a {
    padding: 14px 20px;
    border-bottom: 1px solid var(--line);
    border-left: 3px solid transparent;
    font-size: 16px;
  }

  .nav-bar[data-open] .nav-list a[aria-current="page"] {
    border-bottom-color: var(--line);
    border-left-color: var(--c-orange);
  }

  .nav-bar[data-open] .nav-toggle {
    border-color: var(--c-orange);
    background: rgba(255, 106, 26, .12);
  }

  .rail {
    position: static;
    flex-direction: row;
    gap: 0;
    padding: 0;
    overflow-x: auto;
    border-left: 0;
    border-bottom: 1px solid var(--line);
    -webkit-overflow-scrolling: touch;
  }

  .rail__title { display: none; }

  .rail-link {
    padding: 10px 14px;
    white-space: nowrap;
    border-left: 0;
    border-bottom: 2px solid transparent;
  }

  .rail-link[aria-current="true"] {
    border-left-color: transparent;
    border-bottom-color: var(--c-orange);
  }

  .data-bar { padding: var(--sp-4); }

  .data-bar__inner { gap: var(--sp-3) var(--sp-5); }

  .data-bar__num { font-size: 22px; }
}

@media (max-width: 640px) {
  .container { padding: 0 var(--sp-4); }

  .breadcrumb { padding: var(--sp-3) var(--sp-4) 0; }

  .zone { padding: var(--sp-5) var(--sp-4); }

  .footer-inner {
    grid-template-columns: 1fr;
    padding: var(--sp-5) var(--sp-4) var(--sp-4);
  }

  .footer-legal__inner {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--sp-3);
    padding: var(--sp-4);
  }

  .footer-brand__mark { font-size: 23px; }

  .btn { padding: 11px 18px; font-size: 14.5px; }
}

/* ---------- 21. 降低动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }

  .skip-link { transition: none; }

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