/* ==========================================================================
   天行体育 / 共享样式表 /assets/site.css
   夜间赛场数据台：深空蓝基底 · 荧光青结构线 · 信号橙单一 CTA
   ========================================================================== */

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

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

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

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

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

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

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

h1, h2, h3, h4 { line-height: 1.15; letter-spacing: -0.02em; }

/* ---------- 2. Tokens ---------- */
:root {
  /* 色彩体系 */
  --ink: #050A16;
  --panel: #0B1526;
  --tactic: #142A4C;
  --line: #24406E;
  --cyan: #00E6D2;
  --cyan-soft: #7BF3E6;
  --orange: #FF6A1F;
  --amber: #FFB224;
  --red: #E13B45;
  --moss: #4E7A63;
  --rock: #7C8AA0;
  --paper: #E9F0F7;

  /* 结构尺寸 */
  --rail: 88px;
  --topbar-h: 44px;
  --navbar-h: 64px;
  --maxw: 1280px;
  --gutter: clamp(16px, 2.4vw, 28px);

  /* 排版 */
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", ui-monospace,
    SFMono-Regular, Menlo, Consolas, monospace;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- 3. 基础页面 ---------- */
body {
  min-height: 100vh;
  padding-left: var(--rail);
  background:
    radial-gradient(1100px 620px at 108% -8%, rgba(0, 230, 210, 0.07), transparent 62%),
    radial-gradient(900px 520px at -12% 26%, rgba(255, 106, 31, 0.055), transparent 62%),
    var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

::selection {
  background: var(--cyan);
  color: var(--ink);
}

/* ---------- 4. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  z-index: 300;
  top: 8px;
  left: calc(var(--rail) + 12px);
  padding: 10px 18px;
  background: var(--cyan);
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
  transform: translateY(-180%);
  transition: transform 0.18s var(--ease);
}

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

/* ---------- 5. 左侧品牌轨道 ---------- */
.brand-rail {
  position: fixed;
  inset-block: 0;
  left: 0;
  width: var(--rail);
  z-index: 80;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  padding: 22px 0 18px;
  background: linear-gradient(180deg, #0B1526 0%, #071020 56%, #050A16 100%);
  border-right: 1px solid var(--line);
}

.brand-rail::after {
  content: "";
  position: absolute;
  top: 0;
  right: -1px;
  width: 1px;
  height: 132px;
  background: linear-gradient(180deg, var(--cyan), rgba(0, 230, 210, 0));
}

.rail-mark {
  writing-mode: vertical-rl;
  text-orientation: upright;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.34em;
  color: var(--paper);
}

.rail-season {
  writing-mode: vertical-rl;
  text-orientation: upright;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--rock);
  text-align: center;
}

.rail-top-btn {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1;
  cursor: pointer;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  transition: border-color 0.18s var(--ease), background 0.18s var(--ease);
}

.rail-top-btn:hover {
  border-color: var(--cyan);
  background: rgba(0, 230, 210, 0.1);
}

/* ---------- 6. 头部外壳（吸顶） ---------- */
.site-header {
  position: sticky;
  top: calc(-1 * var(--topbar-h));
  z-index: 70;
  transition: box-shadow 0.22s var(--ease);
}

.site-header[data-scrolled] {
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.6);
}

/* 6.1 上层：品牌说明 + 数据状态带 */
.topbar {
  height: var(--topbar-h);
  background: #071020;
  border-bottom: 1px solid var(--line);
}

.topbar-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.brand-line {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--paper);
  white-space: nowrap;
}

.brand-dot {
  width: 7px;
  height: 7px;
  flex: 0 0 auto;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(0, 230, 210, 0.14);
}

.status-strip {
  display: flex;
  align-items: center;
  gap: 22px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--rock);
}

.status-strip li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}

.status-key {
  color: var(--cyan-soft);
  opacity: 0.72;
  letter-spacing: 0.14em;
}

/* 6.2 下层：主栏目 */
.navbar {
  position: relative;
  background: rgba(11, 21, 38, 0.95);
  border-bottom: 1px solid var(--line);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.navbar-inner {
  display: flex;
  align-items: center;
  gap: 18px;
  min-height: var(--navbar-h);
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 22px;
  flex: 1 1 auto;
  min-width: 0;
}

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

.nav-item { position: relative; }

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 10px 11px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.03em;
  color: var(--paper);
  transition: color 0.18s var(--ease);
}

.nav-index {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--rock);
  opacity: 0.7;
  transition: color 0.18s var(--ease), opacity 0.18s var(--ease);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 11px;
  right: 11px;
  bottom: 3px;
  height: 2px;
  background: transparent;
  transition: background 0.18s var(--ease);
}

.nav-link:hover { color: var(--cyan-soft); }
.nav-link:hover::after { background: var(--line); }
.nav-link:hover .nav-index { color: var(--cyan); opacity: 1; }

.nav-link[aria-current="page"] { color: var(--cyan); }
.nav-link[aria-current="page"]::after { background: var(--cyan); }
.nav-link[aria-current="page"] .nav-index { color: var(--cyan); opacity: 1; }

.nav-utility {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
}

.utility-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--rock);
  border: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.utility-link:hover {
  color: var(--cyan);
  border-color: var(--line);
}

.nav-actions {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ---------- 7. 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 40px;
  padding: 10px 18px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-align: center;
  border: 1px solid transparent;
  border-radius: 0;
  cursor: pointer;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  transition: background 0.18s var(--ease), color 0.18s var(--ease),
    border-color 0.18s var(--ease);
}

.btn-primary {
  background: var(--orange);
  color: var(--ink);
}

.btn-primary:hover { background: #FF8145; }

.btn-ghost {
  background: transparent;
  color: var(--paper);
  border-color: var(--line);
}

.btn-ghost:hover {
  color: var(--cyan);
  border-color: var(--cyan);
}

.btn-cyan {
  background: var(--cyan);
  color: var(--ink);
}

.btn-cyan:hover { background: var(--cyan-soft); }

/* ---------- 8. 移动导航按钮 ---------- */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  cursor: pointer;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
}

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

.nav-toggle-bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 16px;
}

.nav-toggle-bars span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--cyan);
  transition: transform 0.18s var(--ease);
}

.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; }

/* ---------- 9. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 8vw, 96px);
  background: linear-gradient(180deg, #050A16 0%, #071020 58%, #050A16 100%);
  border-top: 1px solid var(--line);
  color: var(--paper);
}

.footer-band {
  background: linear-gradient(100deg, var(--tactic) 0%, #0B1526 58%, #0B1526 100%);
  padding: 18px 0 40px;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 calc(100% - 26px));
}

.footer-band-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 18px;
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.band-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--cyan);
  border: 1px solid rgba(0, 230, 210, 0.4);
  padding: 2px 8px;
}

.band-text {
  font-size: 14px;
  color: var(--paper);
}

.band-link {
  margin-left: auto;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--orange);
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.band-link:hover {
  color: #FF8145;
  border-bottom-color: #FF8145;
}

.footer-inner {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.footer-lead {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 20px;
  padding: 42px 0 26px;
  border-bottom: 1px solid var(--line);
}

.footer-brand {
  display: inline-block;
  font-size: 26px;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--paper);
  transform: skewX(-8deg);
}

.footer-brand:hover { color: var(--cyan); }

.footer-slogan {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--rock);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 34px 26px;
  padding: 34px 0 42px;
}

.footer-col {
  border-left: 1px solid var(--line);
  padding-left: 20px;
  min-width: 0;
}

.footer-col:first-child {
  border-left: 0;
  padding-left: 0;
}

.footer-title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--paper);
}

.footer-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.footer-list {
  display: grid;
  gap: 1px;
}

.footer-link {
  display: inline-block;
  padding: 5px 0;
  font-size: 14px;
  color: var(--rock);
  transition: color 0.16s var(--ease), transform 0.16s var(--ease);
}

a.footer-link:hover {
  color: var(--cyan);
  transform: translateX(3px);
}

.footer-contact {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px dashed rgba(36, 64, 110, 0.85);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--rock);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px 24px;
  padding: 20px 0 34px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  color: var(--rock);
}

.footer-legal {
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
}

.footer-note {
  max-width: 62ch;
}

/* ---------- 10. 正文骨架 ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.page-main { display: block; }

.section { padding-block: clamp(40px, 6vw, 80px); }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 20px;
  margin-bottom: 28px;
}

.section-num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 4vw, 44px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.section-title {
  font-size: clamp(20px, 2.6vw, 26px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
}

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

/* ---------- 11. 面包屑 ---------- */
.breadcrumb {
  padding-block: 13px;
  border-bottom: 1px solid rgba(36, 64, 110, 0.6);
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--rock);
}

.breadcrumb-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  color: var(--line);
}

.breadcrumb-link { color: var(--rock); }
.breadcrumb-link:hover { color: var(--cyan); }

.breadcrumb-item[aria-current="page"] { color: var(--paper); }

/* ---------- 12. 切角面板 ---------- */
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  padding: clamp(18px, 3vw, 28px);
}

.cut-tr {
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 0 100%);
}

.cut-bl {
  clip-path: polygon(0 0, 100% 0, 100% 100%, 22px 100%, 0 calc(100% - 22px));
}

.cut-tl {
  clip-path: polygon(22px 0, 100% 0, 100% 100%, 0 100%, 0 22px);
}

/* ---------- 13. 图片容器基础规则 ---------- */
.media {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  background: linear-gradient(155deg, var(--tactic) 0%, #0B1526 55%, var(--ink) 100%);
  aspect-ratio: 16 / 9;
}

.media-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.media-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(5, 10, 22, 0.12) 0%, rgba(5, 10, 22, 0.58) 100%);
}

.media-caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
  padding: 12px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--paper);
}

.media-4x5 { aspect-ratio: 4 / 5; }
.media-1x1 { aspect-ratio: 1 / 1; }
.media-21x9 { aspect-ratio: 21 / 9; }

/* ---------- 14. 状态标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 2px 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--rock);
  background: rgba(20, 42, 76, 0.45);
  border: 1px solid var(--line);
}

.tag-cyan {
  color: var(--cyan);
  border-color: rgba(0, 230, 210, 0.45);
  background: rgba(0, 230, 210, 0.08);
}

.tag-amber {
  color: var(--amber);
  border-color: rgba(255, 178, 36, 0.45);
  background: rgba(255, 178, 36, 0.08);
}

.tag-red {
  color: var(--red);
  border-color: rgba(225, 59, 69, 0.45);
  background: rgba(225, 59, 69, 0.08);
}

.tag-moss {
  color: #7FB394;
  border-color: rgba(78, 122, 99, 0.55);
  background: rgba(78, 122, 99, 0.14);
}

/* ---------- 15. 栅格 ---------- */
.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2.2vw, 24px);
}

.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; }

/* ---------- 16. 阅读进度条（JS 注入） ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: 200;
  pointer-events: none;
  background: linear-gradient(90deg, var(--cyan), var(--cyan-soft));
  transform: scaleX(0);
  transform-origin: 0 50%;
}

/* ==========================================================================
   17. 响应式
   ========================================================================== */

/* 平板与小屏：导航折叠为可展开面板 */
@media (max-width: 1024px) {
  .site-header { top: 0; }

  .topbar { display: none; }

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

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px var(--gutter) 22px;
    background: var(--panel);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 26px 44px rgba(0, 0, 0, 0.62);
    max-height: calc(100vh - var(--navbar-h));
    overflow-y: auto;
  }

  .site-nav[data-open="true"] { display: flex; }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav-link {
    width: 100%;
    padding: 14px 10px;
    justify-content: flex-start;
    border-bottom: 1px solid rgba(36, 64, 110, 0.55);
    border-left: 2px solid transparent;
  }

  .nav-link::after { display: none; }

  .nav-link[aria-current="page"] {
    border-left-color: var(--cyan);
    background: rgba(0, 230, 210, 0.06);
  }

  .nav-index { font-size: 11px; }

  .nav-utility {
    margin-left: 0;
    margin-top: 14px;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .utility-link {
    padding: 11px 10px;
    font-size: 12px;
    border: 0;
    border-bottom: 1px dashed rgba(36, 64, 110, 0.7);
  }

  .utility-link:hover { border-color: rgba(36, 64, 110, 0.7); color: var(--cyan); }

  .nav-actions { margin-left: auto; }

  .nav-actions .btn {
    min-height: 36px;
    padding: 8px 13px;
    font-size: 13px;
  }

  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .footer-col:nth-child(3) {
    border-left: 0;
    padding-left: 0;
  }
}

@media (max-width: 900px) {
  body {
    padding-left: 0;
    padding-bottom: 56px;
  }

  .brand-rail {
    top: auto;
    bottom: 0;
    left: 0;
    right: 0;
    width: auto;
    height: 56px;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    border-right: 0;
    border-top: 1px solid var(--line);
    background: linear-gradient(90deg, #071020 0%, #0B1526 100%);
  }

  .brand-rail::after { display: none; }

  .rail-mark {
    writing-mode: horizontal-tb;
    text-orientation: mixed;
    font-size: 13px;
    letter-spacing: 0.2em;
  }

  .rail-season {
    writing-mode: horizontal-tb;
    text-orientation: mixed;
    font-size: 11px;
    letter-spacing: 0.12em;
  }

  .rail-top-btn {
    width: 36px;
    height: 36px;
    font-size: 14px;
  }

  .skip-link { left: 12px; }

  .grid-12 .col-3,
  .grid-12 .col-4,
  .grid-12 .col-5 { grid-column: span 6; }

  .grid-12 .col-7,
  .grid-12 .col-8,
  .grid-12 .col-9 { grid-column: span 12; }

  .footer-band { padding-bottom: 34px; }
}

@media (max-width: 640px) {
  body { font-size: 15px; }

  .brand-line { font-size: 12px; }

  .nav-actions .btn {
    min-height: 34px;
    padding: 7px 10px;
    font-size: 12px;
  }

  .grid-12 > * { grid-column: span 12; }

  .footer-grid { grid-template-columns: 1fr; gap: 0; }

  .footer-col {
    border-left: 0;
    padding-left: 0;
    border-top: 1px solid var(--line);
    padding-top: 18px;
    margin-top: 18px;
  }

  .footer-col:first-child {
    border-top: 0;
    padding-top: 0;
    margin-top: 0;
  }

  .band-link { margin-left: 0; }

  .footer-bottom { flex-direction: column; }

  .footer-brand { font-size: 22px; }
}

@media (max-width: 420px) {
  .nav-actions { display: none; }
}

/* ---------- 18. 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;
  }
}