/* ============================================================
   速搏看台 · 全站共享样式 /assets/site.css
   reset · 变量 · 中文排版 · 刊头页头 · 页脚 · 基础组件
   ============================================================ */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 132px;
}

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

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

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

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

a { color: inherit; }

/* ---------- 2. 设计变量 ---------- */
:root {
  /* 色彩 */
  --ink-900: #050D14;   /* 深蓝黑 */
  --ink-800: #071A16;   /* 深墨绿 主背景 */
  --ink-700: #0B1B2B;   /* 夜场蓝 次背景 */
  --ink-600: #102621;   /* 实色内容层 */
  --paper:   #F2F7F4;   /* 冷白 */
  --sand:    #D6C7AD;   /* 低饱和沙色 */
  --lime:    #C8FF3D;   /* 荧光青柠 */
  --warm:    #FF8B3D;   /* 暖橘 */
  --cyan:    #5DE0D0;   /* 电光青 */
  --alert:   #FF5A5F;   /* 警戒红 */
  --smoke:   #7E938B;   /* 烟灰绿 */

  --line: rgba(126, 147, 139, 0.28);
  --line-strong: rgba(214, 199, 173, 0.34);
  --glass: rgba(242, 247, 244, 0.06);
  --glass-line: rgba(242, 247, 244, 0.14);

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

  /* 尺度 */
  --shell: 1312px;
  --gutter: clamp(18px, 4vw, 56px);
  --radius: 3px;
  --ease: cubic-bezier(0.32, 0.72, 0.24, 1);
}

/* ---------- 3. 中文排版基础 ---------- */
body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--ink-800);
  background-image:
    radial-gradient(circle at 84% -12%, rgba(93, 224, 208, 0.13), transparent 56%),
    radial-gradient(circle at 2% 4%, rgba(200, 255, 61, 0.08), transparent 46%);
  background-repeat: no-repeat;
  background-attachment: fixed;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(34px, 5.6vw, 68px); line-height: 1.06; }
h2 { font-size: clamp(24px, 3.2vw, 38px); }
h3 { font-size: clamp(19px, 2.2vw, 25px); }
h4 { font-size: clamp(16px, 1.6vw, 19px); }

p { max-width: 72ch; }

::selection { background: var(--lime); color: var(--ink-800); }

:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
}

/* ---------- 4. 布局容器 ---------- */
.wrap {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(36px, 6vw, 76px); }
.section + .section { border-top: 1px solid var(--line); }

.section-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: end;
  gap: 10px 22px;
  margin-bottom: clamp(22px, 3vw, 36px);
}

.section-index {
  font-family: var(--font-mono);
  font-size: clamp(30px, 5vw, 58px);
  font-weight: 700;
  line-height: 0.86;
  letter-spacing: -0.03em;
  color: transparent;
  -webkit-text-stroke: 1px var(--smoke);
}

.section-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.14;
}

.section-note {
  grid-column: 2;
  max-width: 60ch;
  color: var(--sand);
  font-size: 15px;
}

.eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 10px;
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

/* ---------- 5. 页头 / 刊头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: rgba(7, 26, 22, 0.94);
  -webkit-backdrop-filter: blur(16px) saturate(130%);
  backdrop-filter: blur(16px) saturate(130%);
  border-bottom: 1px solid var(--line);
  color: var(--paper);
}

.skip-link {
  position: absolute;
  left: 50%;
  top: -72px;
  transform: translateX(-50%);
  z-index: 200;
  padding: 10px 22px;
  background: var(--lime);
  color: var(--ink-800);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.06em;
  text-decoration: none;
  border-radius: 0 0 var(--radius) var(--radius);
  transition: top 0.18s var(--ease);
}
.skip-link:focus { top: 0; }

.masthead {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  grid-template-areas: "meta brand actions";
  align-items: center;
  gap: 10px 20px;
  padding-block: 14px;
  transition: padding 0.2s var(--ease);
}

.masthead-meta {
  grid-area: meta;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--sand);
  max-width: 100%;
}

.status-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 3px rgba(200, 255, 61, 0.16);
  animation: status-breathe 2.8s ease-in-out infinite;
  flex: none;
}

.status-item--warm { color: var(--warm); }
.status-item--warm .status-dot {
  background: var(--warm);
  box-shadow: 0 0 0 3px rgba(255, 139, 61, 0.16);
}

.status-sep { color: var(--smoke); }

@keyframes status-breathe {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.38; }
}

.masthead-brand {
  grid-area: brand;
  display: block;
  text-align: center;
  text-decoration: none;
  color: var(--paper);
}

.brand-name {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(21px, 2.5vw, 29px);
  line-height: 1.08;
  letter-spacing: 0.18em;
  text-indent: 0.18em;
  transition: color 0.18s var(--ease), font-size 0.2s var(--ease);
}
.masthead-brand:hover .brand-name { color: var(--lime); }

.brand-tagline {
  display: block;
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.22em;
  text-indent: 0.22em;
  color: var(--smoke);
  transition: opacity 0.2s var(--ease);
}

.masthead-actions {
  grid-area: actions;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
}

.header-cta {
  display: inline-flex;
  align-items: center;
  padding: 9px 18px;
  background: var(--lime);
  color: var(--ink-800);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-decoration: none;
  border-radius: var(--radius);
  transition: background 0.18s var(--ease), transform 0.18s var(--ease);
}
.header-cta:hover { background: #DCFF72; transform: translateY(-1px); }

.nav-toggle {
  display: none;
  width: 44px;
  height: 40px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 0;
  background: rgba(242, 247, 244, 0.06);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color 0.18s var(--ease), background 0.18s var(--ease);
}
.nav-toggle:hover { border-color: var(--lime); background: rgba(200, 255, 61, 0.1); }

.nav-toggle-bar {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--paper);
  transition: transform 0.22s var(--ease), opacity 0.22s var(--ease);
}

.site-header[data-open] .nav-toggle-bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.site-header[data-open] .nav-toggle-bar:nth-child(2) { opacity: 0; }
.site-header[data-open] .nav-toggle-bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.site-nav {
  position: relative;
  border-top: 1px solid var(--line);
  background: transparent;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-list {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(8px, 2.4vw, 38px);
  margin: 0;
}

.nav-item { display: block; }

.nav-link {
  display: block;
  position: relative;
  padding: 14px 4px 13px;
  font-size: 15px;
  letter-spacing: 0.1em;
  text-decoration: none;
  color: var(--sand);
  border-bottom: 2px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.nav-link:hover { color: var(--paper); }
.nav-link[aria-current="page"] {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

.nav-cta { display: none; }

.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  pointer-events: none;
  overflow: hidden;
}

.scroll-progress-bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan), var(--lime) 58%, var(--warm));
}

/* 压缩态 */
.site-header[data-compact] .masthead { padding-block: 6px; }
.site-header[data-compact] .brand-name { font-size: 20px; }
.site-header[data-compact] .brand-tagline { opacity: 0; }
.site-header[data-compact] .nav-link { padding-block: 9px; }

/* ---------- 6. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 8vw, 96px);
  background: var(--ink-900);
  border-top: 1px solid var(--line);
  color: var(--paper);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), var(--lime) 40%, var(--warm) 76%, transparent);
  opacity: 0.85;
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
  gap: clamp(26px, 5vw, 64px);
  padding-block: clamp(36px, 5vw, 62px) clamp(26px, 4vw, 40px);
}

.footer-brand { min-width: 0; }

.footer-brand-link {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3vw, 34px);
  letter-spacing: 0.16em;
  text-decoration: none;
  color: var(--paper);
  transition: color 0.18s var(--ease);
}
.footer-brand-link:hover { color: var(--lime); }

.footer-summary {
  margin-top: 14px;
  max-width: 42ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--sand);
}

.footer-contact {
  margin-top: 22px;
  display: grid;
  gap: 8px;
}

.footer-contact-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  min-width: 0;
}

.footer-contact-label {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--smoke);
}

.copy-btn {
  padding: 2px 0;
  background: none;
  border: 0;
  border-bottom: 1px dashed rgba(93, 224, 208, 0.42);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.5;
  text-align: left;
  cursor: pointer;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.copy-btn:hover { color: var(--lime); border-bottom-color: var(--lime); }
.copy-btn.is-copied { color: var(--warm); border-bottom-color: var(--warm); }

.footer-contact-note {
  margin-top: 14px;
  max-width: 40ch;
  font-size: 13px;
  line-height: 1.7;
  color: var(--smoke);
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px 20px;
  align-content: start;
}

.footer-col { min-width: 0; }

.footer-col-title {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--smoke);
  text-transform: uppercase;
}

.footer-links {
  margin-top: 16px;
  display: grid;
  gap: 11px;
}

.footer-link {
  display: inline-block;
  font-size: 15px;
  color: var(--sand);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.footer-link:hover { color: var(--lime); border-bottom-color: var(--lime); }

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 26px;
  padding-block: 18px 26px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--smoke);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

.footer-legal-link {
  color: var(--sand);
  text-decoration: none;
  transition: color 0.18s var(--ease);
}
.footer-legal-link:hover { color: var(--lime); }

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 18px;
}

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

/* ---------- 7. 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding: 11px 22px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.18s var(--ease), color 0.18s var(--ease),
              border-color 0.18s var(--ease), transform 0.18s var(--ease);
}

.btn--primary { background: var(--lime); color: var(--ink-800); }
.btn--primary:hover { background: #DCFF72; transform: translateY(-1px); }

.btn--warm { background: var(--warm); color: var(--ink-900); }
.btn--warm:hover { background: #FFA163; transform: translateY(-1px); }

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

.btn--sm { padding: 7px 14px; font-size: 13px; }

/* ---------- 8. 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  background: rgba(242, 247, 244, 0.04);
  color: var(--sand);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  line-height: 1.6;
}

.tag--lime { background: var(--lime); border-color: var(--lime); color: var(--ink-800); }
.tag--warm { background: rgba(255, 139, 61, 0.14); border-color: rgba(255, 139, 61, 0.5); color: var(--warm); }
.tag--cyan { background: rgba(93, 224, 208, 0.12); border-color: rgba(93, 224, 208, 0.45); color: var(--cyan); }
.tag--sand { background: rgba(214, 199, 173, 0.12); border-color: rgba(214, 199, 173, 0.42); color: var(--sand); }

/* ---------- 9. 面包屑与页面开头 ---------- */
.breadcrumbs { padding-block: 18px 0; }

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--smoke);
}

.breadcrumb-item { display: inline-flex; align-items: center; gap: 8px; }
.breadcrumb-item + .breadcrumb-item::before { content: "/"; color: var(--smoke); }

.breadcrumb-link { color: var(--sand); text-decoration: none; transition: color 0.18s var(--ease); }
.breadcrumb-link:hover { color: var(--lime); }

.breadcrumb-current { color: var(--paper); }

.page-intro { padding-block: clamp(26px, 5vw, 60px) clamp(18px, 3vw, 32px); }

.page-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 6vw, 72px);
  line-height: 1.04;
  letter-spacing: -0.02em;
}

.page-lede {
  margin-top: 18px;
  max-width: 64ch;
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.8;
  color: var(--sand);
}

/* ---------- 10. 网格与分栏 ---------- */
.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 46px);
  align-items: start;
}

.layout-main { min-width: 0; }
.layout-aside { min-width: 0; }

.grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(14px, 2vw, 24px);
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(12px, 1.8vw, 22px);
}

/* ---------- 11. 卡片 ---------- */
.card {
  position: relative;
  padding: clamp(18px, 2.4vw, 26px);
  background: var(--ink-600);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--paper);
}

.card--glass {
  background: var(--glass);
  border-color: var(--glass-line);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.card--solid { background: var(--ink-700); }

.card--line { background: transparent; border-color: var(--line-strong); }

/* ---------- 12. 图片容器基础规则 ---------- */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  background-color: var(--ink-600);
  background-image:
    linear-gradient(rgba(126, 147, 139, 0.16) 1px, transparent 1px),
    linear-gradient(90deg, rgba(126, 147, 139, 0.16) 1px, transparent 1px);
  background-size: 34px 34px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

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

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(5, 13, 20, 0) 42%, rgba(5, 13, 20, 0.76) 100%);
}

.media-frame--plain::after { display: none; }
.media-frame--band { aspect-ratio: 21 / 9; }
.media-frame--wide { aspect-ratio: 16 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--tall { aspect-ratio: 4 / 5; }

.media-caption {
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 12px;
  z-index: 1;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--sand);
}

/* ---------- 13. 滚动显现 ---------- */
.js-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.4s var(--ease), transform 0.4s var(--ease);
}

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

/* ---------- 14. 响应式 ---------- */
@media (min-width: 720px) {
  .grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 900px) {
  .grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 960px) {
  .layout { grid-template-columns: minmax(0, 7.1fr) minmax(0, 4.9fr); }
}

@media (min-width: 1180px) {
  .grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (min-width: 901px) and (max-width: 1090px) {
  .masthead-meta { font-size: 11px; }
  .nav-list { gap: 14px; }
  .nav-link { font-size: 14px; letter-spacing: 0.05em; }
  .header-cta { padding: 8px 14px; font-size: 13px; }
}

@media (max-width: 900px) {
  html { scroll-padding-top: 112px; }

  .masthead {
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas:
      "brand actions"
      "meta meta";
    row-gap: 10px;
    padding-block: 11px 9px;
  }

  .masthead-brand { text-align: left; }
  .brand-name { font-size: 22px; letter-spacing: 0.14em; text-indent: 0.14em; }
  .brand-tagline { font-size: 10px; letter-spacing: 0.16em; text-indent: 0.16em; }

  .masthead-meta {
    justify-content: flex-start;
    font-size: 11px;
    gap: 3px 7px;
  }

  .header-cta { display: none; }
  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: grid;
    grid-template-rows: 0fr;
    background: var(--ink-700);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 24px 44px rgba(5, 13, 20, 0.6);
    visibility: hidden;
    transition: grid-template-rows 0.24s var(--ease), visibility 0.24s var(--ease);
  }

  .site-header[data-open] .site-nav {
    grid-template-rows: 1fr;
    visibility: visible;
  }

  .site-header[data-open] .masthead { padding-block: 11px 9px; }

  .nav-inner {
    overflow: hidden;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    padding-block: 8px 20px;
  }

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

  .nav-link {
    padding: 13px 2px;
    font-size: 16px;
    letter-spacing: 0.08em;
    border-bottom: 1px solid var(--line);
  }

  .nav-link[aria-current="page"] {
    color: var(--lime);
    background: rgba(200, 255, 61, 0.09);
    padding-left: 12px;
    border-bottom-color: var(--line);
  }

  .site-header[data-compact] .brand-name { font-size: 22px; }
  .site-header[data-compact] .brand-tagline { opacity: 1; }
  .site-header[data-compact] .nav-link { padding-block: 13px; }

  .nav-cta {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    margin-top: 16px;
    padding: 13px 18px;
    background: var(--lime);
    color: var(--ink-800);
    font-size: 15px;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-decoration: none;
    border-radius: var(--radius);
  }

  .footer-top { grid-template-columns: minmax(0, 1fr); }
  .footer-summary { max-width: 56ch; }
}

@media (max-width: 560px) {
  .section-head { grid-template-columns: auto minmax(0, 1fr); gap: 8px 14px; }
  .section-note { grid-column: 2; font-size: 14px; }

  .footer-cols { grid-template-columns: minmax(0, 1fr); gap: 26px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .footer-contact-item { flex-direction: column; gap: 2px; }
  .copy-btn { font-size: 12.5px; word-break: break-all; }
}

/* ---------- 15. 减弱动效 ---------- */
@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;
    scroll-behavior: auto !important;
  }

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

  .status-dot { animation: none; }
}

/* ---------- 16. 打印基础 ---------- */
@media print {
  .site-header,
  .site-footer,
  .scroll-progress,
  .nav-toggle,
  .skip-link { display: none !important; }

  body { background: #ffffff; color: #111111; }
}