/* ============================================================
   米兰赛场 · 共享站点样式 /assets/site.css
   夜场战术板：炭黑底、粗描边、硬阴影、直角、记分牌数字
   ============================================================ */

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

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

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

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

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

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

a { color: inherit; }

/* ---------- 2. Tokens ---------- */
:root {
  --red: #C8102E;
  --ink: #0E0F12;
  --rock: #2A2D33;
  --cream: #F2EDE4;
  --pitch: #2FA84F;
  --neon: #B6FF3D;
  --amber: #FFB02E;
  --clay: #8C4A3C;
  --moss: #5A6B58;
  --line: #C9CCD1;

  --hard: 0 8px 0 rgba(0, 0, 0, .55);
  --hard-sm: 0 5px 0 rgba(0, 0, 0, .55);
  --ease: cubic-bezier(.2, .7, .3, 1);

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

  --wrap: 1240px;
  --gutter: clamp(16px, 4vw, 32px);
  --header-h: 72px;
}

/* ---------- 3. 中文排版与基础 ---------- */
body {
  background-color: var(--ink);
  color: var(--cream);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.75;
  letter-spacing: .01em;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  background-image:
    repeating-linear-gradient(45deg, rgba(255, 255, 255, .014) 0 1px, transparent 1px 3px);
}

h1, h2, h3, h4 {
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -.02em;
}

h1 { font-size: clamp(32px, 5vw, 56px); }
h2 { font-size: clamp(24px, 3.4vw, 40px); }
h3 { font-size: clamp(19px, 2.2vw, 26px); }

p { max-width: 38em; }

strong, b { font-weight: 800; }

::selection { background: var(--red); color: var(--cream); }

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

#main-content { display: block; }

/* ---------- 4. 布局与通用容器 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.section { padding: clamp(48px, 8vw, 96px) 0; }

.grid {
  display: grid;
  gap: clamp(16px, 3vw, 24px);
}

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

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

.grid--aside { grid-template-columns: minmax(0, 3fr) minmax(0, 9fr); }

.rule {
  height: 0;
  border: 0;
  border-top: 1px dashed rgba(201, 204, 209, .4);
  margin: clamp(24px, 4vw, 40px) 0;
}

.eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--amber);
  margin: 0 0 10px;
}

.lede {
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.8;
  color: var(--cream);
  max-width: 34em;
}

.prose {
  max-width: 36em;
  font-size: 17px;
  line-height: 1.85;
}

.prose p { margin-bottom: 1.1em; }
.prose p:last-child { margin-bottom: 0; }
.prose strong { font-weight: 800; color: var(--neon); }
.prose h2, .prose h3 { margin: 1.4em 0 .6em; }
.prose ul { list-style: none; margin: 0 0 1.1em; padding: 0; }
.prose ul li {
  position: relative;
  padding-left: 20px;
  margin-bottom: .5em;
}
.prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 10px;
  height: 2px;
  background: var(--red);
}

/* ---------- 5. 堆叠面板 / 编号章节 ---------- */
.panel {
  position: relative;
  background-color: var(--rock);
  border: 2px solid var(--line);
  box-shadow: var(--hard);
  padding: clamp(20px, 4vw, 40px);
  background-image:
    repeating-linear-gradient(45deg, rgba(255, 255, 255, .016) 0 1px, transparent 1px 3px);
}

.panel--dark { background-color: var(--ink); }

.panel--light {
  background-color: var(--cream);
  color: var(--ink);
  border-color: var(--ink);
  background-image:
    repeating-linear-gradient(45deg, rgba(14, 15, 18, .02) 0 1px, transparent 1px 3px);
}

.panel--shift-left { margin-right: clamp(0px, 4vw, 56px); }
.panel--shift-right { margin-left: clamp(0px, 4vw, 56px); }

.panel--light .section-num { color: var(--clay); }
.panel--light .prose strong { color: var(--red); }
.panel--light .eyebrow { color: var(--clay); }

.panel-head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px 16px;
  padding-bottom: 14px;
  margin-bottom: clamp(18px, 3vw, 28px);
  border-bottom: 1px dashed rgba(201, 204, 209, .38);
}

.panel--light .panel-head { border-bottom-color: rgba(14, 15, 18, .28); }

.section-num {
  display: inline-block;
  font-family: var(--mono);
  font-size: clamp(30px, 5vw, 52px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.04em;
  color: var(--moss);
  transform-origin: left center;
  transition: color .18s ease-out, transform .18s ease-out;
}

.section-title {
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 900;
  letter-spacing: -.02em;
  margin: 0;
}

.chapter { transition: box-shadow .18s ease-out; }
.chapter.is-active { box-shadow: 0 8px 0 rgba(200, 16, 46, .38); }
.chapter.is-active .section-num {
  color: var(--red);
  transform: scale(1.06);
}

.panel--light.chapter.is-active .section-num { color: var(--red); }

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border: 2px solid var(--line);
  background-color: transparent;
  color: var(--cream);
  font-family: var(--font);
  font-weight: 800;
  font-size: 15px;
  letter-spacing: .02em;
  line-height: 1.3;
  text-decoration: none;
  cursor: pointer;
  transition: transform .14s var(--ease), box-shadow .14s var(--ease), background-color .14s var(--ease), color .14s var(--ease);
}

.btn:hover,
.btn:focus-visible {
  transform: translate(-1px, -1px);
  box-shadow: var(--hard-sm);
}

.btn:active {
  transform: translate(0, 0);
  box-shadow: none;
}

.btn--primary {
  background-color: var(--red);
  border-color: var(--red);
  color: var(--cream);
  box-shadow: var(--hard-sm);
}

.btn--primary:hover,
.btn--primary:focus-visible { background-color: #A50D26; }

.btn--ghost {
  border-color: var(--pitch);
  color: var(--cream);
}

.btn--ghost:hover { background-color: rgba(47, 168, 79, .16); }

.btn--light {
  background-color: var(--cream);
  border-color: var(--ink);
  color: var(--ink);
}

.btn--light:hover { background-color: #fff; }

/* ---------- 7. Chip / 标签 ---------- */
.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border: 2px solid var(--line);
  background-color: transparent;
  color: var(--cream);
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: .04em;
  line-height: 1.4;
  text-decoration: none;
  cursor: pointer;
  transition: border-color .14s var(--ease), background-color .14s var(--ease), color .14s var(--ease);
}

.chip:hover,
.chip:focus-visible { border-color: var(--pitch); }

.chip.is-active,
.chip[aria-pressed="true"] {
  background-color: var(--red);
  border-color: var(--red);
  color: var(--cream);
}

.chip[disabled],
.chip[aria-disabled="true"] {
  opacity: .45;
  cursor: not-allowed;
}

.tag {
  display: inline-block;
  padding: 3px 8px;
  border: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--cream);
  line-height: 1.5;
}

.tag--green { border-color: var(--pitch); color: #6FE08C; }
.tag--amber { border-color: var(--amber); color: var(--amber); }

/* ---------- 8. 卡片与记分牌数字 ---------- */
.card {
  background-color: var(--rock);
  border: 2px solid var(--line);
  box-shadow: var(--hard);
  padding: clamp(16px, 3vw, 24px);
}

.panel--light .card {
  background-color: #fff;
  border-color: var(--ink);
}

.stat { display: block; }

.stat-num {
  display: block;
  font-family: var(--mono);
  font-weight: 700;
  font-size: clamp(48px, 9vw, 96px);
  line-height: .9;
  letter-spacing: -.03em;
  color: var(--cream);
  font-variant-numeric: tabular-nums;
}

.panel--light .stat-num { color: var(--ink); }

.stat-label {
  display: block;
  margin-top: 10px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--moss);
}

/* ---------- 9. 图片容器基础规则 ---------- */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  border: 2px solid var(--line);
  box-shadow: var(--hard);
  overflow: hidden;
  background-color: var(--rock);
  background-image:
    repeating-linear-gradient(135deg, rgba(200, 16, 46, .14) 0 8px, transparent 8px 16px),
    linear-gradient(160deg, var(--rock), var(--ink));
}

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

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

.panel--light .media-frame { border-color: var(--ink); }

.media-cap {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--moss);
  max-width: 40em;
}

.panel--light .media-cap { color: #55605A; }

/* ---------- 10. 面包屑 ---------- */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--moss);
  padding: 0;
  margin: 0 0 clamp(16px, 3vw, 24px);
}

.crumbs li { display: inline-flex; align-items: center; gap: 8px; }

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

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

.crumbs a:hover { color: var(--neon); }

.panel--light .crumbs { color: #55605A; }
.panel--light .crumbs a { color: var(--ink); }

/* ---------- 11. 进入视口显现 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .22s var(--ease), transform .22s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 12. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: -90px;
  left: 16px;
  z-index: 200;
  padding: 10px 16px;
  background-color: var(--neon);
  color: var(--ink);
  font-weight: 800;
  font-size: 15px;
  text-decoration: none;
  border: 2px solid var(--ink);
  transition: top .16s var(--ease);
}

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

/* ---------- 13. 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background-color: rgba(14, 15, 18, .78);
  background-image: linear-gradient(180deg, rgba(14, 15, 18, .94), rgba(14, 15, 18, .18));
  border-bottom: 2px solid transparent;
  transition: background-color .18s var(--ease), border-color .18s var(--ease), box-shadow .18s var(--ease);
}

.site-header.is-scrolled {
  background-color: var(--ink);
  background-image: none;
  border-bottom-color: var(--red);
  box-shadow: 0 8px 0 rgba(0, 0, 0, .55);
}

.header-rail {
  height: 5px;
  background-image: repeating-linear-gradient(135deg, var(--red) 0 10px, #0E0F12 10px 20px);
}

.header-bar {
  position: relative;
  display: flex;
  align-items: center;
  gap: clamp(10px, 2vw, 24px);
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 12px var(--gutter);
  min-height: 64px;
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--cream);
  flex: 0 0 auto;
}

.brand-mark {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 28px;
  height: 28px;
  flex: 0 0 auto;
}

.brand-mark i {
  display: block;
  height: 5px;
  background-color: var(--red);
  transform: skewX(-22deg);
  transition: background-color .16s var(--ease);
}

.brand-mark i:nth-child(2) { background-color: var(--cream); width: 78%; }
.brand-mark i:nth-child(3) { background-color: var(--cream); width: 56%; }

.brand:hover .brand-mark i { background-color: var(--neon); }

.brand-text { display: flex; flex-direction: column; line-height: 1.1; }

.brand-name {
  display: inline-block;
  font-size: 17px;
  font-weight: 900;
  letter-spacing: -.02em;
  transform: skewX(-6deg);
  color: var(--cream);
}

.brand-sub {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: .24em;
  color: var(--moss);
  margin-top: 3px;
}

.brand-tagline {
  font-size: 12px;
  letter-spacing: .12em;
  line-height: 1.5;
  color: var(--moss);
  max-width: 150px;
  margin: 0;
  padding-left: 14px;
  border-left: 1px dashed rgba(201, 204, 209, .38);
}

/* 导航 */
.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(4px, 1vw, 10px);
  margin-left: auto;
}

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

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 10px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .01em;
  text-decoration: none;
  color: var(--cream);
  border-bottom: 2px solid transparent;
  transition: color .14s var(--ease), background-color .14s var(--ease), border-color .14s var(--ease);
}

.nav-link:hover,
.nav-link:focus-visible {
  color: #fff;
  background-color: rgba(200, 16, 46, .22);
  border-bottom-color: var(--pitch);
}

.nav-link[aria-current="page"] {
  background-color: var(--red);
  border-bottom-color: var(--red);
  color: var(--cream);
}

.nav-index {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .1em;
  color: var(--amber);
}

.nav-link[aria-current="page"] .nav-index { color: var(--cream); }

.nav-cta {
  margin-left: 6px;
  padding: 9px 14px;
  font-size: 13px;
  white-space: nowrap;
}

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 2px solid var(--line);
  background-color: transparent;
  color: var(--cream);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .14em;
  cursor: pointer;
  transition: border-color .14s var(--ease), background-color .14s var(--ease);
}

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

.nav-toggle-bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 3px;
  width: 18px;
  height: 14px;
}

.nav-toggle-bars span {
  display: block;
  height: 2px;
  width: 100%;
  background-color: currentColor;
  transition: transform .16s var(--ease), opacity .16s var(--ease);
}

.nav-toggle[aria-expanded="true"] { border-color: var(--red); background-color: rgba(200, 16, 46, .2); }

.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(1) { transform: translateY(5px) 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(-5px) rotate(-45deg); }

.site-header[data-open] .nav-toggle-bars span:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.site-header[data-open] .nav-toggle-bars span:nth-child(2) { opacity: 0; }
.site-header[data-open] .nav-toggle-bars span:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }
.site-header[data-open] { background-color: var(--ink); background-image: none; }

/* 回到筛选 */
.header-jump {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .12em;
  text-decoration: none;
  color: var(--neon);
  border: 1px solid var(--neon);
  padding: 6px 10px;
  white-space: nowrap;
  opacity: 0;
  transform: translateY(-6px);
  pointer-events: none;
  transition: opacity .18s var(--ease), transform .18s var(--ease);
}

.site-header.is-scrolled .header-jump {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}

.header-jump:hover { background-color: rgba(182, 255, 61, .14); }

/* 阅读进度 */
.read-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 3px;
  background-color: rgba(201, 204, 209, .12);
  pointer-events: none;
}

.read-progress-bar {
  display: block;
  height: 100%;
  width: 0;
  background-image: linear-gradient(90deg, var(--pitch), var(--neon));
}

/* ---------- 14. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 8vw, 96px);
  background-color: var(--ink);
  border-top: 2px solid var(--line);
}

.footer-stripe {
  height: 10px;
  background-image: repeating-linear-gradient(135deg, var(--red) 0 14px, #0E0F12 14px 28px);
}

.footer-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.5fr) minmax(0, .95fr);
  gap: clamp(24px, 4vw, 48px);
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: clamp(36px, 6vw, 68px) var(--gutter) 28px;
}

.footer-brand { display: block; }

.brand--footer { margin-bottom: 14px; }
.brand--footer .brand-name { font-size: 20px; }

.footer-claim {
  font-size: 14px;
  font-weight: 800;
  color: var(--cream);
  letter-spacing: .02em;
  margin: 0 0 10px;
}

.footer-note {
  font-size: 13px;
  line-height: 1.7;
  color: var(--moss);
  max-width: 32em;
  margin: 0;
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(16px, 2.4vw, 28px);
}

.footer-col-title {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--amber);
  margin: 0 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px dashed rgba(201, 204, 209, .32);
}

.footer-links {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
}

.footer-links a {
  font-size: 14px;
  color: var(--cream);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .14s var(--ease), border-color .14s var(--ease);
}

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

.footer-contact-title {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--amber);
  margin: 0 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px dashed rgba(201, 204, 209, .32);
}

.contact-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 10px;
  font-size: 14px;
  line-height: 1.6;
}

.contact-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--moss);
  border: 1px solid rgba(201, 204, 209, .35);
  padding: 1px 6px;
}

.contact-value {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--cream);
  word-break: break-all;
}

.copy-btn {
  padding: 2px 8px;
  border: 1px solid var(--pitch);
  background-color: transparent;
  color: var(--pitch);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .1em;
  cursor: pointer;
  transition: background-color .14s var(--ease), color .14s var(--ease), border-color .14s var(--ease);
}

.copy-btn:hover { background-color: rgba(47, 168, 79, .18); }

.copy-btn[data-copied] {
  background-color: var(--pitch);
  border-color: var(--pitch);
  color: var(--ink);
}

.copy-btn-label { pointer-events: none; }

.footer-bottom {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 20px;
  padding-top: 20px;
  margin-top: 8px;
  border-top: 1px dashed rgba(201, 204, 209, .32);
  font-size: 13px;
  color: var(--moss);
}

.footer-meta { margin: 0; font-family: var(--mono); letter-spacing: .06em; }

.footer-legal {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
}

.footer-legal a {
  color: var(--cream);
  text-decoration: none;
  border-bottom: 1px solid var(--pitch);
}

.footer-legal a:hover { color: var(--neon); }

.footer-icp { margin: 0; font-family: var(--mono); letter-spacing: .06em; }

/* ---------- 15. 响应式 ---------- */
@media (max-width: 1100px) {
  .brand-tagline { display: none; }
  .nav-link { padding: 8px 8px; font-size: 13px; }
}

@media (max-width: 980px) {
  .nav-toggle { display: inline-flex; margin-left: auto; }
  .header-jump { display: none; }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
    margin: 0;
    padding: 16px var(--gutter) 20px;
    background-color: var(--rock);
    border-top: 2px solid var(--red);
    border-bottom: 2px solid var(--line);
    box-shadow: 0 8px 0 rgba(0, 0, 0, .55);
    max-height: calc(100vh - 80px);
    overflow-y: auto;
  }

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

  .nav-list { flex-direction: column; align-items: stretch; gap: 2px; }

  .nav-link {
    width: 100%;
    padding: 12px 10px;
    font-size: 15px;
    border-bottom: 1px dashed rgba(201, 204, 209, .22);
  }

  .nav-cta { margin-left: 0; margin-top: 8px; width: 100%; padding: 12px 14px; font-size: 15px; }

  .grid--aside { grid-template-columns: minmax(0, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .panel--shift-left { margin-right: 0; }
  .panel--shift-right { margin-left: 0; }

  .footer-inner { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .footer-contact { grid-column: 1 / -1; }
}

@media (max-width: 720px) {
  body { font-size: 16px; }
  .grid--2, .grid--3 { grid-template-columns: minmax(0, 1fr); }
  .footer-inner { grid-template-columns: minmax(0, 1fr); }
  .footer-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .panel { box-shadow: 0 6px 0 rgba(0, 0, 0, .55); }
}

@media (max-width: 420px) {
  .footer-cols { grid-template-columns: minmax(0, 1fr); }
  .nav-toggle-text { display: none; }
}

/* ---------- 16. 减少动态 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }

  .reveal { opacity: 1; transform: none; }
  .section-num { transition: none; }
  .chapter.is-active .section-num { transform: none; }
  .btn:hover, .btn:focus-visible { transform: none; }
  .site-header { transition: none; }
}