/* ==========================================================================
   欧易体育主站 · 共享样式表 /assets/site.css
   深空蓝底 · 荧光青与活力橙脉冲 · 玻璃胶囊命令栏
   ========================================================================== */

/* ---------- 1. 设计变量 ---------- */
:root {
  --c-deep: #0A1128;
  --c-night: #060B1A;
  --c-indigo: #0F2043;
  --c-cyan: #00E5FF;
  --c-orange: #FF6B35;
  --c-teal: #00B39A;
  --c-berry: #7A2E57;
  --c-sand: #F4E3C1;
  --c-white: #E8F1F8;
  --c-mist: #9FB3C8;

  --ink: var(--c-white);
  --ink-dim: var(--c-mist);

  --font-head: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-body: var(--font-head);
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --fs-12: 0.75rem;
  --fs-14: 0.875rem;
  --fs-17: 1.0625rem;
  --fs-22: 1.375rem;
  --fs-32: 2rem;
  --fs-52: 3.25rem;
  --fs-88: 5.5rem;

  --wrap: 1280px;
  --wrap-narrow: 720px;
  --gutter: clamp(1rem, 4vw, 2.5rem);
  --header-h: 5rem;

  --r-sm: 10px;
  --r-md: 16px;
  --r-lg: 24px;
  --r-pill: 999px;

  --glass: rgba(15, 32, 67, 0.72);
  --glass-line: rgba(0, 229, 255, 0.18);
  --hair: rgba(159, 179, 200, 0.14);

  --shadow-1: 0 18px 44px -26px rgba(0, 0, 0, 0.95);
  --shadow-2: 0 26px 56px -30px rgba(0, 229, 255, 0.42);

  --ease: cubic-bezier(0.22, 0.7, 0.3, 1);
}

/* ---------- 2. 重置 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body, h1, h2, h3, h4, h5, p, ul, ol, li, figure, blockquote, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, picture, svg, video { display: block; max-width: 100%; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; width: 100%; }
:focus-visible { outline: 2px solid var(--c-cyan); outline-offset: 3px; border-radius: 4px; }

/* ---------- 3. 页面底色与氛围层 ---------- */
body {
  position: relative;
  min-height: 100vh;
  padding-top: var(--header-h);
  background-color: var(--c-deep);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--fs-17);
  line-height: 1.8;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background:
    radial-gradient(1100px 620px at 8% -12%, rgba(0, 229, 255, 0.12), transparent 62%),
    radial-gradient(900px 520px at 98% 2%, rgba(255, 107, 53, 0.10), transparent 64%),
    linear-gradient(180deg, #0A1128 0%, #0A142E 46%, #060B1A 100%);
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.5;
  background-image:
    linear-gradient(rgba(159, 179, 200, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(159, 179, 200, 0.05) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 78%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 78%);
}

/* ---------- 4. 中文排版 ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--c-white);
}
h1 { font-size: clamp(1.9rem, 5vw, var(--fs-52)); }
h2 { font-size: clamp(1.4rem, 3.4vw, var(--fs-32)); }
h3 { font-size: clamp(1.1rem, 2.2vw, var(--fs-22)); }
p { color: var(--c-white); }

.t-88 {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(3rem, 11vw, var(--fs-88));
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: -0.04em;
}
.t-52 { font-size: clamp(2rem, 6.5vw, var(--fs-52)); }
.num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; letter-spacing: 0; }
.lead { font-size: clamp(1.05rem, 1.7vw, 1.25rem); line-height: 1.75; color: var(--c-white); }
.muted { color: var(--c-mist); }
.small { font-size: var(--fs-14); }

.prose { max-width: 68ch; }
.prose > * + * { margin-top: 1em; }
.prose h2, .prose h3 { margin-top: 1.8em; }
.prose ul, .prose ol { padding-left: 0; }
.prose li { position: relative; padding-left: 1.1em; margin-top: 0.5em; }
.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 8px;
  height: 2px;
  background: var(--c-cyan);
}
.prose strong { color: var(--c-sand); font-weight: 700; }
.prose a {
  color: var(--c-cyan);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 1px;
}

/* ---------- 5. 布局容器与网格 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.wrap--narrow { max-width: var(--wrap-narrow); }

.grid { display: grid; gap: clamp(1rem, 2.5vw, 1.75rem); }
.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, 5fr) minmax(0, 2fr); }
.grid--split-wide { grid-template-columns: minmax(0, 7fr) minmax(0, 3fr); }

.stack { display: grid; gap: clamp(0.9rem, 2vw, 1.5rem); }
.cluster { display: flex; flex-wrap: wrap; align-items: center; gap: 0.6rem 1rem; }

.offset-1 { margin-top: 14px; }
.offset-2 { margin-top: 28px; }

.rule {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, rgba(0, 229, 255, 0.5), rgba(159, 179, 200, 0.06));
}

/* ---------- 6. 跳转链接 ---------- */
.skip-link {
  position: absolute;
  left: 50%;
  top: 0.35rem;
  z-index: 120;
  padding: 0.6rem 1.2rem;
  border-radius: var(--r-pill);
  background: var(--c-cyan);
  color: #03202a;
  font-size: var(--fs-14);
  font-weight: 700;
  line-height: 1.2;
  transform: translate(-50%, -180%);
  transition: transform 0.22s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible { transform: translate(-50%, 0); }

/* ---------- 7. 固定头部与胶囊命令栏 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: block;
  padding: 0.7rem var(--gutter);
}

.readline {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: rgba(159, 179, 200, 0.12);
}
.readline__bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--c-cyan), var(--c-orange));
  will-change: transform;
}

.cmdbar {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: clamp(0.4rem, 1.2vw, 1rem);
  padding: 0.5rem 0.5rem 0.5rem 1.05rem;
  border-radius: var(--r-pill);
  transition: padding 0.3s var(--ease);
}
.cmdbar::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  border-radius: inherit;
  background: var(--glass);
  border: 1px solid var(--glass-line);
  box-shadow: var(--shadow-1);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  backdrop-filter: blur(16px) saturate(150%);
  transition: box-shadow 0.3s var(--ease), border-color 0.3s var(--ease);
}
.site-header.is-scrolled .cmdbar { padding-block: 0.3rem; }
.site-header.is-scrolled .cmdbar::before {
  border-color: rgba(0, 229, 255, 0.28);
  box-shadow: 0 20px 42px -28px rgba(0, 0, 0, 1), 0 0 0 1px rgba(0, 229, 255, 0.06);
}

/* 品牌区 */
.brand {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding-right: 0.35rem;
}
.brand__mark {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1.02rem;
  letter-spacing: -0.01em;
  color: var(--c-white);
  white-space: nowrap;
}
.brand__sep { color: var(--c-cyan); padding: 0 0.08em; }
.brand__season {
  display: inline-flex;
  align-items: center;
  gap: 0.38rem;
  padding-left: 0.75rem;
  border-left: 1px solid rgba(159, 179, 200, 0.24);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--c-mist);
  white-space: nowrap;
}
.pulse {
  flex: 0 0 auto;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--c-cyan);
  animation: pulse-ring 2.6s var(--ease) infinite;
}
@keyframes pulse-ring {
  0% { box-shadow: 0 0 0 0 rgba(0, 229, 255, 0.55); }
  70% { box-shadow: 0 0 0 9px rgba(0, 229, 255, 0); }
  100% { box-shadow: 0 0 0 0 rgba(0, 229, 255, 0); }
}

/* 导航 */
.nav {
  flex: 1 1 auto;
  display: flex;
  justify-content: center;
  min-width: 0;
}
.nav__list { display: flex; align-items: center; gap: 0.1rem; }
.nav__link {
  position: relative;
  display: inline-block;
  padding: 0.48rem 0.72rem;
  border-radius: var(--r-pill);
  font-size: var(--fs-14);
  font-weight: 600;
  color: var(--c-mist);
  white-space: nowrap;
  transition: color 0.18s var(--ease), background-color 0.18s var(--ease);
}
.nav__link:hover { color: var(--c-white); background: rgba(0, 229, 255, 0.08); }
.nav__link[aria-current="page"] { color: var(--c-white); background: rgba(0, 229, 255, 0.13); }
.nav__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0.1rem;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: var(--c-cyan);
  transform: translateX(-50%);
}

/* 右侧操作区 */
.cmdbar__actions { flex: 0 0 auto; display: flex; align-items: center; gap: 0.45rem; }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.52rem 0.85rem;
  border-radius: var(--r-pill);
  border: 1px solid rgba(159, 179, 200, 0.3);
  color: var(--c-white);
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}
.nav-toggle:hover { border-color: var(--c-cyan); color: var(--c-cyan); }
.nav-toggle__bars {
  position: relative;
  width: 15px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: background-color 0.24s var(--ease);
}
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 15px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.24s var(--ease), top 0.24s var(--ease);
}
.nav-toggle__bars::before { top: -5px; }
.nav-toggle__bars::after { top: 5px; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { top: 0; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { top: 0; transform: rotate(-45deg); }
.nav-toggle__text { line-height: 1; }

/* ---------- 8. 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.55rem 1.1rem;
  border-radius: var(--r-pill);
  border: 1px solid transparent;
  font-size: var(--fs-14);
  font-weight: 700;
  line-height: 1;
  white-space: nowrap;
  cursor: pointer;
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease),
              background-color 0.2s var(--ease), color 0.2s var(--ease),
              border-color 0.2s var(--ease);
}
.btn--accent { background: var(--c-orange); color: #1A0700; }
.btn--accent:hover { transform: translateY(-2px); box-shadow: 0 14px 28px -14px rgba(255, 107, 53, 0.85); }
.btn--cyan { background: var(--c-cyan); color: #032630; }
.btn--cyan:hover { transform: translateY(-2px); box-shadow: 0 14px 28px -14px rgba(0, 229, 255, 0.8); }
.btn--ghost { border-color: rgba(0, 229, 255, 0.45); color: var(--c-cyan); background: rgba(0, 229, 255, 0.07); }
.btn--ghost:hover { background: rgba(0, 229, 255, 0.16); transform: translateY(-2px); }
.btn--line { border-color: rgba(159, 179, 200, 0.32); color: var(--c-white); }
.btn--line:hover { border-color: var(--c-cyan); color: var(--c-cyan); }
.btn--lg { padding: 0.85rem 1.7rem; font-size: 1rem; }
.btn--block { width: 100%; }

/* ---------- 9. 面包屑 ---------- */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  margin-bottom: 1.4rem;
  font-size: var(--fs-12);
  color: var(--c-mist);
}
.crumbs li { display: flex; align-items: center; gap: 0.45rem; }
.crumbs li + li::before { content: "/"; color: rgba(159, 179, 200, 0.45); }
.crumbs a:hover { color: var(--c-cyan); }

/* ---------- 10. 章节与目录式标题 ---------- */
.section {
  position: relative;
  padding-block: clamp(2.2rem, 5.5vw, 4.2rem);
}
.section__head {
  position: relative;
  padding-left: 1.1rem;
  margin-bottom: clamp(1.2rem, 3vw, 2rem);
}
.section__head::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.2em;
  width: 3px;
  height: 1.7em;
  border-radius: 3px;
  background: linear-gradient(180deg, var(--c-cyan), rgba(0, 229, 255, 0));
  transform: scaleY(0.18);
  transform-origin: top;
  opacity: 0.45;
  transition: transform 0.55s var(--ease), opacity 0.55s var(--ease);
}
.section.is-visible .section__head::before { transform: scaleY(1); opacity: 1; }
.section__index {
  display: block;
  margin-bottom: 0.4rem;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.2em;
  color: var(--c-orange);
}
.section__title { font-size: clamp(1.3rem, 3vw, var(--fs-32)); }
.section__sub {
  margin-top: 0.6rem;
  max-width: 62ch;
  font-size: var(--fs-14);
  color: var(--c-mist);
}

/* ---------- 11. 卡片与面板 ---------- */
.card {
  position: relative;
  padding: clamp(1rem, 2.2vw, 1.5rem);
  border: 1px solid var(--hair);
  border-radius: var(--r-md);
  background: var(--c-indigo);
  transition: transform 0.22s var(--ease), border-color 0.22s var(--ease), box-shadow 0.22s var(--ease);
}
.card:hover {
  transform: translateY(-2px);
  border-color: rgba(0, 229, 255, 0.4);
  box-shadow: var(--shadow-2);
}
.card--glass {
  background: var(--glass);
  border-color: var(--glass-line);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}
.card--berry { background: linear-gradient(150deg, var(--c-berry) 0%, #35122B 100%); border-color: rgba(244, 227, 193, 0.18); }
.card--teal { background: linear-gradient(150deg, #073C37 0%, #06222A 100%); border-color: rgba(0, 179, 154, 0.28); }

.panel {
  padding: clamp(1.1rem, 2.4vw, 1.8rem);
  border: 1px solid var(--hair);
  border-radius: var(--r-md);
  background: var(--c-indigo);
}
.panel--berry { background: linear-gradient(160deg, var(--c-berry) 0%, #35122B 100%); border-color: rgba(244, 227, 193, 0.18); }
.panel--teal { background: linear-gradient(160deg, #073C37 0%, #06222A 100%); border-color: rgba(0, 179, 154, 0.28); }
.panel--glass {
  background: var(--glass);
  border-color: var(--glass-line);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

/* ---------- 12. 状态标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.22rem 0.6rem;
  border: 1px solid transparent;
  border-radius: var(--r-pill);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1.5;
}
.tag--live { color: var(--c-cyan); border-color: rgba(0, 229, 255, 0.45); background: rgba(0, 229, 255, 0.08); }
.tag--next { color: var(--c-orange); border-color: rgba(255, 107, 53, 0.45); background: rgba(255, 107, 53, 0.08); }
.tag--done { color: var(--c-mist); border-color: rgba(159, 179, 200, 0.3); }

/* ---------- 13. 数据块 ---------- */
.stat { display: grid; gap: 0.3rem; }
.stat__value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.8rem, 5vw, var(--fs-52));
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--c-cyan);
}
.stat__value--orange { color: var(--c-orange); }
.stat__value--sand { color: var(--c-sand); }
.stat__label { font-size: var(--fs-12); letter-spacing: 0.14em; color: var(--c-mist); }

/* ---------- 14. 表格 ---------- */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--hair);
  border-radius: var(--r-md);
  background: rgba(15, 32, 67, 0.55);
}
.table { min-width: 560px; font-size: var(--fs-14); }
.table th,
.table td { padding: 0.85rem 1rem; text-align: left; border-bottom: 1px solid var(--hair); }
.table thead th {
  font-size: var(--fs-12);
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--c-mist);
  background: rgba(6, 11, 26, 0.6);
}
.table tbody tr:nth-child(even) { background: rgba(15, 32, 67, 0.4); }
.table tbody tr { transition: background-color 0.18s var(--ease); }
.table tbody tr:hover { background: rgba(0, 229, 255, 0.07); }
.table tbody tr:last-child th,
.table tbody tr:last-child td { border-bottom: 0; }
.table .num { color: var(--c-sand); }

/* ---------- 15. 图片占位容器 ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  border-radius: var(--r-md);
  background: linear-gradient(140deg, #0F2043 0%, #060B1A 100%);
  isolation: isolate;
}
.media img { width: 100%; height: 100%; object-fit: cover; }
.media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(6, 11, 26, 0) 42%, rgba(6, 11, 26, 0.72) 100%);
}
.media--21x9 { aspect-ratio: 21 / 9; }
.media--16x9 { aspect-ratio: 16 / 9; }
.media--4x3 { aspect-ratio: 4 / 3; }
.media--1x1 { aspect-ratio: 1 / 1; }
.media__caption {
  margin-top: 0.6rem;
  font-size: var(--fs-12);
  color: var(--c-mist);
}

/* ---------- 16. 页脚 ---------- */
.site-footer {
  margin-top: clamp(3.5rem, 8vw, 7rem);
  background: var(--c-night);
  border-top: 1px solid rgba(0, 229, 255, 0.16);
  color: var(--c-mist);
}
.footer__inner { padding-block: clamp(2.5rem, 5vw, 4rem); }
.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.5fr 1.1fr;
  gap: clamp(1.6rem, 4vw, 3rem);
}
.footer__col { min-width: 0; }
.footer__brand {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
  color: var(--c-white);
}
.footer__sep { color: var(--c-cyan); padding: 0 0.08em; }
.footer__note {
  margin-top: 0.7rem;
  max-width: 34ch;
  font-size: var(--fs-14);
  line-height: 1.75;
}
.footer__title {
  margin-bottom: 1rem;
  font-family: var(--font-head);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--c-cyan);
}
.footer__list { display: grid; gap: 0.55rem; font-size: var(--fs-14); }
.footer__index { margin-top: 1.2rem; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.footer__link { color: var(--c-mist); transition: color 0.18s var(--ease), padding-left 0.18s var(--ease); }
.footer__link:hover { color: var(--c-white); padding-left: 4px; }
.footer__contact a { font-family: var(--font-mono); color: var(--c-sand); }
.footer__contact a:hover { color: var(--c-cyan); }
.footer__meta .num { color: var(--c-sand); }
.footer__hint {
  margin-top: 0.9rem;
  padding-left: 0.7rem;
  border-left: 2px solid var(--c-berry);
  font-size: var(--fs-12);
  line-height: 1.7;
  color: rgba(159, 179, 200, 0.85);
}
.footer__base {
  padding-block: 1.1rem;
  border-top: 1px solid var(--hair);
  font-size: var(--fs-12);
}
.footer__base-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem 1.4rem;
}
.footer__copy { font-size: var(--fs-12); color: var(--c-mist); }
.footer__legal { display: flex; flex-wrap: wrap; gap: 0.5rem 1.2rem; }
.footer__stamp { font-family: var(--font-mono); color: rgba(159, 179, 200, 0.75); }

/* ---------- 17. 平板与移动端 ---------- */
@media (max-width: 1020px) {
  .nav-toggle { display: inline-flex; }
  .nav {
    position: fixed;
    top: calc(var(--header-h) - 0.4rem);
    left: var(--gutter);
    right: var(--gutter);
    display: block;
    max-height: calc(100vh - var(--header-h) - 1.5rem);
    overflow-y: auto;
    padding: 0.6rem;
    border: 1px solid var(--glass-line);
    border-radius: var(--r-lg);
    background: rgba(6, 11, 26, 0.97);
    box-shadow: 0 34px 70px -34px rgba(0, 0, 0, 0.95);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-12px);
    transition: opacity 0.24s var(--ease), transform 0.24s var(--ease), visibility 0.24s linear;
  }
  .nav[data-open] { opacity: 1; visibility: visible; transform: translateY(0); }
  .nav__list { display: grid; gap: 0.18rem; }
  .nav__link { display: block; padding: 0.8rem 1rem; border-radius: var(--r-md); font-size: 1rem; }
  .nav__link[aria-current="page"]::after { display: none; }

  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--split,
  .grid--split-wide { grid-template-columns: minmax(0, 1fr); }
  .offset-1,
  .offset-2 { margin-top: 0; }

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

@media (max-width: 640px) {
  body { font-size: 1rem; }
  .brand__season { display: none; }
  .nav-toggle__text { display: none; }
  .cmdbar { padding-left: 0.85rem; }
  .btn--accent { padding: 0.55rem 0.9rem; font-size: 0.8rem; }
  .grid--2,
  .grid--3 { grid-template-columns: minmax(0, 1fr); }
  .footer__grid { grid-template-columns: minmax(0, 1fr); }
  .footer__index { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer__base-inner { flex-direction: column; align-items: flex-start; }
}

/* ---------- 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;
  }
  .section__head::before { transform: scaleY(1); opacity: 1; }
  .card:hover { transform: none; }
}