/* =========================================================
   百博中心 · 共享样式 /assets/site.css
   工程档案式工业科技品牌站 — reset / tokens / 中英混排 /
   悬浮胶囊页头 / 档案袋页脚 / 通用组件
   ========================================================= */

/* ---------- reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 116px;
}
body,
h1, h2, h3, h4, h5, h6,
p, figure, blockquote, dl, dd, ul, ol {
  margin: 0;
  padding: 0;
}
ul, ol { list-style: none; }
img, svg, video, canvas { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; cursor: pointer; }
table { border-collapse: collapse; width: 100%; }

/* ---------- tokens ---------- */
:root {
  --c-blue: #0A5BFF;
  --c-blue-deep: #073EA8;
  --c-ink: #061A3A;
  --c-graphite: #1C1F26;
  --c-paper: #F4F1EA;
  --c-silver: #E6E2D8;
  --c-line: #B9C2CC;
  --c-cyan: #00E5FF;
  --c-orange: #FF6B35;
  --c-red: #D8412F;
  --c-green: #1F9E6E;
  --c-muted: #4A4E57;

  --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, "Courier New", monospace;

  --shell: 1240px;
  --gutter: clamp(16px, 4vw, 56px);
  --radius-s: 10px;
  --radius-m: 18px;
  --radius-l: 28px;
  --pill: 999px;

  --shadow-1: 0 14px 34px -24px rgba(6, 26, 58, .7);
  --shadow-2: 0 30px 70px -34px rgba(6, 26, 58, .6);
  --ease: cubic-bezier(.22, .61, .36, 1);
}

/* ---------- base ---------- */
body {
  background-color: var(--c-paper);
  background-image:
    radial-gradient(120% 90% at 100% 0%, rgba(10, 91, 255, .07), transparent 58%),
    radial-gradient(90% 70% at 0% 8%, rgba(216, 65, 47, .045), transparent 60%);
  color: var(--c-graphite);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.75;
  font-weight: 400;
  letter-spacing: .002em;
  overflow-x: hidden;
}
h1, h2, h3, h4 {
  color: var(--c-ink);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -.02em;
}
h1 { font-size: clamp(36px, 5.4vw, 68px); }
h2 { font-size: clamp(26px, 3.2vw, 40px); }
h3 { font-size: clamp(20px, 2vw, 28px); line-height: 1.25; }
h4 { font-size: 18px; line-height: 1.35; }
strong { font-weight: 700; color: var(--c-ink); }
code, kbd, samp { font-family: var(--font-mono); font-size: .92em; }
::selection { background: var(--c-blue); color: #fff; }

:focus-visible {
  outline: 2px solid var(--c-blue);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- a11y 工具 ---------- */
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap;
}
.skip-link {
  position: fixed;
  top: 10px; left: 10px;
  z-index: 999;
  transform: translateY(-200%);
  padding: 12px 20px;
  border-radius: var(--pill);
  background: var(--c-ink);
  color: var(--c-paper);
  font-size: 14px;
  font-weight: 700;
  box-shadow: var(--shadow-2);
  transition: transform .22s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible { transform: translateY(0); outline-color: var(--c-cyan); }

/* ---------- 页头：悬浮胶囊浮岛 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  display: flex;
  justify-content: center;
  padding: 14px var(--gutter) 8px;
}
.scroll-progress {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: rgba(185, 194, 204, .28);
  overflow: hidden;
}
.scroll-progress__bar {
  display: block;
  width: 100%; height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--c-blue), var(--c-cyan) 70%, var(--c-orange));
  transition: transform .14s linear;
}
.nav-shell {
  position: relative;
  width: 100%;
  max-width: var(--shell);
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 9px 10px 9px 16px;
  border-radius: var(--pill);
  background: rgba(244, 241, 234, .84);
  border: 1px solid rgba(28, 31, 38, .10);
  box-shadow: 0 20px 42px -36px rgba(6, 26, 58, .95);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  backdrop-filter: blur(16px) saturate(140%);
  transition: background .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
}
.site-header[data-scrolled] .nav-shell {
  background: rgba(244, 241, 234, .96);
  border-color: rgba(6, 26, 58, .16);
  box-shadow: 0 26px 50px -30px rgba(6, 26, 58, .55);
}

/* 品牌岛 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  min-height: 44px;
  padding-right: 6px;
}
.brand__mark {
  flex: none;
  width: 38px; height: 38px;
  display: grid; place-items: center;
  border-radius: 12px;
  background: linear-gradient(150deg, var(--c-ink) 8%, var(--c-blue) 100%);
  box-shadow: inset 0 0 0 1px rgba(0, 229, 255, .4);
  color: #fff;
  font-size: 16px;
  font-weight: 800;
}
.brand__text { display: flex; flex-direction: column; line-height: 1.14; }
.brand__name {
  font-size: 16px;
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--c-ink);
}
.brand__sub {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .06em;
  color: var(--c-muted);
}

/* 栏目 */
.nav {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
}
.nav__list { display: flex; align-items: center; gap: 2px; }
.nav__link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 40px;
  padding: 8px 13px;
  border-radius: var(--pill);
  font-size: 14.5px;
  font-weight: 600;
  color: rgba(28, 31, 38, .74);
  white-space: nowrap;
  transition: color .2s var(--ease), background .2s var(--ease), box-shadow .2s var(--ease);
}
.nav__link:hover { color: var(--c-ink); background: rgba(10, 91, 255, .07); }
.nav__link[aria-current="page"] {
  color: var(--c-ink);
  background: rgba(10, 91, 255, .11);
  box-shadow: inset 0 0 0 1px rgba(10, 91, 255, .34);
}
.nav__link[aria-current="page"]::after {
  content: "";
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--c-blue);
}
.nav__actions {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-left: 8px;
  margin-left: 4px;
  border-left: 1px solid rgba(28, 31, 38, .12);
}

/* 移动开关 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  min-height: 44px;
  margin-left: auto;
  padding: 8px 15px;
  border-radius: var(--pill);
  border: 1px solid rgba(28, 31, 38, .16);
  color: var(--c-ink);
  font-size: 14px;
  font-weight: 700;
}
.nav-toggle:hover { border-color: var(--c-blue); color: var(--c-blue); }
.nav-toggle__bars { display: grid; gap: 4px; width: 18px; }
.nav-toggle__bars span {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform .25s var(--ease), opacity .2s var(--ease);
}
.site-header[data-open] .nav-toggle__bars span:nth-child(1) { transform: translateY(6px) 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(-6px) rotate(-45deg); }

/* ---------- 页脚：档案袋 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 7vw, 112px);
  background: var(--c-ink);
  color: rgba(244, 241, 234, .74);
  overflow: hidden;
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(185, 194, 204, .06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(185, 194, 204, .06) 1px, transparent 1px);
  background-size: 72px 72px;
  pointer-events: none;
}
.site-footer::after {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--c-cyan), var(--c-blue) 42%, var(--c-orange));
}
.site-footer :focus-visible { outline-color: var(--c-cyan); }
.footer__inner {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding: clamp(48px, 6vw, 88px) var(--gutter) 32px;
}
.footer__top {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  gap: clamp(24px, 4vw, 64px);
  padding-bottom: clamp(30px, 4vw, 54px);
  border-bottom: 1px solid rgba(185, 194, 204, .18);
}
.footer__brand { display: flex; align-items: flex-start; gap: 16px; }
.footer__mark {
  flex: none;
  width: 52px; height: 52px;
  display: grid; place-items: center;
  border-radius: 16px;
  background: linear-gradient(150deg, var(--c-blue), var(--c-blue-deep));
  box-shadow: inset 0 0 0 1px rgba(0, 229, 255, .42);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .02em;
}
.footer__tagline {
  max-width: 30ch;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.6;
  color: rgba(244, 241, 234, .9);
}
.footer__contact { display: grid; gap: 10px; align-content: start; }
.footer__contact-item {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  font-size: 14px;
  line-height: 1.6;
}
.footer__contact-key {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--c-cyan);
}
.footer__contact-val { color: rgba(244, 241, 234, .74); word-break: break-word; }
.footer__cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(24px, 3vw, 48px);
  padding: clamp(30px, 4vw, 54px) 0;
}
.footer__col-title {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--c-paper);
}
.footer__col-num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--c-orange);
}
.footer__list { display: grid; gap: 8px; }
.footer__link {
  display: inline-flex;
  align-items: center;
  gap: 0;
  min-height: 32px;
  font-size: 15px;
  color: rgba(244, 241, 234, .72);
  transition: color .2s var(--ease), gap .22s var(--ease);
}
.footer__link::before {
  content: "";
  width: 0; height: 2px;
  background: var(--c-cyan);
  transition: width .24s var(--ease), margin-right .24s var(--ease);
}
.footer__link:hover { color: #fff; }
.footer__link:hover::before { width: 14px; margin-right: 10px; }
.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  padding-top: 22px;
  border-top: 1px solid rgba(185, 194, 204, .18);
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: rgba(185, 194, 204, .72);
}

/* ---------- 布局容器 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.section { padding-block: clamp(64px, 8vw, 140px); }
.section--tight { padding-block: clamp(40px, 5vw, 84px); }
.u-bleed {
  width: 100vw;
  margin-left: calc(50% - 50vw);
  margin-right: calc(50% - 50vw);
}
.band { padding-block: clamp(64px, 8vw, 128px); }
.band--silver { background: var(--c-silver); }
.band--paper { background: var(--c-paper); }
.band--ink {
  background: var(--c-ink);
  color: rgba(244, 241, 234, .78);
}
.band--ink h1,
.band--ink h2,
.band--ink h3 { color: var(--c-paper); }
.band--ink .eyebrow { color: var(--c-cyan); }
.band--ink .eyebrow::before { background: var(--c-cyan); }
.band--ink .stat__num { color: var(--c-cyan); }
.band--ink .stat__unit,
.band--ink .stat__label { color: rgba(244, 241, 234, .62); }
.band--ink .lead { color: rgba(244, 241, 234, .78); }
.band--ink .divider { background: rgba(185, 194, 204, .28); }
.band--ink .crumbs,
.band--ink .crumbs a { color: rgba(185, 194, 204, .78); }

/* ---------- 网格 ---------- */
.grid { display: grid; gap: clamp(20px, 2.6vw, 36px); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid--asym { grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); }
.grid--editorial { grid-template-columns: minmax(0, 1fr) minmax(0, 2.2fr); }

/* ---------- 文本元素 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--c-muted);
}
.eyebrow::before {
  content: "";
  flex: none;
  width: 8px; height: 8px;
  background: var(--c-red);
}
.lead {
  font-size: clamp(17px, 1.6vw, 20px);
  line-height: 1.7;
  color: var(--c-muted);
  max-width: 62ch;
}
.prose {
  max-width: 68ch;
  font-size: 17px;
  line-height: 1.8;
  color: rgba(28, 31, 38, .88);
}
.prose > * + * { margin-top: 1.4em; }
.prose h2 { margin-top: 2.2em; }
.prose h3 { margin-top: 1.8em; }
.prose ul, .prose ol { padding-left: 1.4em; }
.prose ul { list-style: square; }
.prose ol { list-style: decimal; }
.prose li + li { margin-top: .5em; }
.prose blockquote {
  padding-left: 18px;
  border-left: 3px solid var(--c-red);
  color: var(--c-ink);
  font-weight: 600;
}
.divider {
  height: 1px;
  border: 0;
  background: var(--c-line);
}
.link-more {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13.5px;
  letter-spacing: .04em;
  color: var(--c-blue);
  border-bottom: 1px solid rgba(10, 91, 255, .35);
  padding-bottom: 2px;
  transition: color .2s var(--ease), border-color .2s var(--ease), gap .2s var(--ease);
}
.link-more::after { content: "→"; }
.link-more:hover { color: var(--c-ink); border-color: var(--c-cyan); gap: 12px; }

/* ---------- 面包屑 ---------- */
.crumbs {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-muted);
}
.crumbs__list { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.crumbs__list li { display: flex; align-items: center; gap: 8px; }
.crumbs__list li + li::before { content: "/"; color: var(--c-line); }
.crumbs a { transition: color .2s var(--ease); }
.crumbs a:hover { color: var(--c-blue); }
.crumbs [aria-current="page"] { color: var(--c-graphite); font-weight: 600; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 44px;
  padding: 11px 22px;
  border: 1px solid transparent;
  border-radius: var(--pill);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .01em;
  white-space: nowrap;
  transition: background .2s var(--ease), color .2s var(--ease),
              border-color .2s var(--ease), box-shadow .2s var(--ease),
              transform .12s var(--ease);
}
.btn:active { transform: translateY(1px); }
.btn--primary {
  background: var(--c-blue);
  color: #fff;
  box-shadow: 0 14px 28px -20px rgba(10, 91, 255, 1);
}
.btn--primary:hover { background: var(--c-blue-deep); box-shadow: 0 0 0 3px rgba(0, 229, 255, .35); }
.btn--orange {
  background: var(--c-orange);
  color: #fff;
  box-shadow: 0 14px 28px -20px rgba(255, 107, 53, .95);
}
.btn--orange:hover { background: #E85A24; box-shadow: 0 0 0 3px rgba(255, 107, 53, .3); }
.btn--ghost {
  background: transparent;
  border-color: var(--c-line);
  color: var(--c-ink);
}
.btn--ghost:hover { border-color: var(--c-cyan); color: var(--c-blue); background: rgba(0, 229, 255, .08); }
.band--ink .btn--ghost {
  border-color: rgba(185, 194, 204, .4);
  color: var(--c-paper);
}
.band--ink .btn--ghost:hover { border-color: var(--c-cyan); color: var(--c-cyan); }

/* ---------- 标签 ---------- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 30px;
  padding: 5px 12px;
  border-radius: var(--pill);
  border: 1px solid rgba(10, 91, 255, .24);
  background: rgba(10, 91, 255, .08);
  color: var(--c-blue);
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: .02em;
}
.chip--orange { border-color: rgba(255, 107, 53, .32); background: rgba(255, 107, 53, .1); color: #C74A18; }
.chip--green { border-color: rgba(31, 158, 110, .3); background: rgba(31, 158, 110, .1); color: #15744F; }
.chip--plain { border-color: rgba(28, 31, 38, .16); background: transparent; color: var(--c-muted); }
.band--ink .chip { border-color: rgba(0, 229, 255, .35); background: rgba(0, 229, 255, .1); color: var(--c-cyan); }

/* ---------- 指标 ---------- */
.stat { display: grid; gap: 8px; }
.stat__value { display: flex; align-items: baseline; gap: 6px; }
.stat__num {
  font-family: var(--font-mono);
  font-size: clamp(32px, 4.6vw, 48px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--c-ink);
  font-variant-numeric: tabular-nums;
}
.stat__unit { font-family: var(--font-mono); font-size: 14px; color: var(--c-muted); }
.stat__label { font-size: 14px; line-height: 1.6; color: var(--c-muted); }

/* ---------- 卡片 ---------- */
.card {
  position: relative;
  padding: clamp(20px, 2.4vw, 32px);
  border: 1px solid rgba(28, 31, 38, .1);
  border-radius: var(--radius-l);
  background: #fff;
  box-shadow: var(--shadow-1);
}
.card--paper { background: var(--c-paper); }
.card--ink {
  background: var(--c-ink);
  border-color: rgba(0, 229, 255, .2);
  color: rgba(244, 241, 234, .78);
}
.card--ink h2, .card--ink h3, .card--ink strong { color: var(--c-paper); }

/* ---------- 图片容器 ---------- */
.figure { display: flex; flex-direction: column; gap: 12px; }
.figure__media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid rgba(28, 31, 38, .1);
  border-radius: var(--radius-l);
  background-color: var(--c-silver);
  background-image:
    radial-gradient(120% 100% at 0% 0%, rgba(10, 91, 255, .16), transparent 62%),
    linear-gradient(160deg, #E6E2D8 0%, #D6D1C4 100%);
}
.figure__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.figure__media--placeholder::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(6, 26, 58, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(6, 26, 58, .07) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}
.figure__media--16x9 { aspect-ratio: 16 / 9; }
.figure__media--4x3 { aspect-ratio: 4 / 3; }
.figure__media--1x1 { aspect-ratio: 1 / 1; }
.figure__media--3x4 { aspect-ratio: 3 / 4; }
.figure__caption {
  padding-left: 12px;
  border-left: 2px solid var(--c-red);
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--c-muted);
}
.band--ink .figure__caption { color: rgba(185, 194, 204, .82); }

/* ---------- 滚动显现 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .6s var(--ease), transform .6s var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
}
.reveal.is-in { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .nav-toggle { display: inline-flex; }
  .nav {
    position: absolute;
    top: calc(100% + 12px);
    left: 0; right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    margin-left: 0;
    padding: 16px;
    border-radius: 26px;
    background: rgba(244, 241, 234, .98);
    border: 1px solid rgba(6, 26, 58, .14);
    box-shadow: var(--shadow-2);
    -webkit-backdrop-filter: blur(18px);
    backdrop-filter: blur(18px);
  }
  .nav[data-open] { display: flex; animation: nav-in .24s var(--ease); }
  .nav__list { flex-direction: column; align-items: stretch; gap: 2px; }
  .nav__link {
    min-height: 48px;
    padding: 12px 14px;
    border-radius: 14px;
    font-size: 16px;
  }
  .nav__link[aria-current="page"] { padding-left: 18px; }
  .nav__actions {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
    padding: 14px 0 0;
    margin-left: 0;
    border-left: 0;
    border-top: 1px solid rgba(28, 31, 38, .12);
  }
  .nav__actions .btn { width: 100%; }
  .grid--editorial,
  .grid--asym { grid-template-columns: minmax(0, 1fr); }
}
@keyframes nav-in {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 900px) {
  .grid--3, .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer__top { grid-template-columns: minmax(0, 1fr); }
  .footer__cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  body { font-size: 16.5px; }
  .site-header { padding: 10px 12px 6px; }
  .nav-shell { padding: 8px 8px 8px 12px; gap: 10px; }
  .grid--2, .grid--3, .grid--4 { grid-template-columns: minmax(0, 1fr); }
  .footer__cols { grid-template-columns: minmax(0, 1fr); }
  .footer__contact-item { grid-template-columns: 74px minmax(0, 1fr); gap: 10px; }
  .footer__bottom { flex-direction: column; }
}
@media (max-width: 460px) {
  .brand__sub { display: none; }
  .nav-toggle__label { display: none; }
}

/* ---------- 动效降级 ---------- */
@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 !important; transform: none !important; }
  .scroll-progress__bar { transition: none; }
  .nav[data-open] { animation: none; }
}