/* ============================================================
   启博EPN · 共享站点样式 /assets/site.css
   堆叠画板 · 框架导航 · 档案标签 · 玻璃与纸白并置
   ============================================================ */

/* 1. RESET */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body, h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd, ul, ol { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; width: 100%; }
main { display: block; }
#main-content { scroll-margin-top: 96px; }

/* 2. 变量 */
:root {
  --ink-950: #050D15;
  --ink-900: #0A1929;
  --ink-800: #112B42;
  --ink-700: #1C405D;
  --paper: #F4EFE4;
  --warm: #FFF9EE;
  --orange: #F26B2B;
  --orange-lift: #FF8B4A;
  --celadon: #4FAF9E;
  --celadon-deep: #2F7A6D;
  --slate: #8FA6B8;
  --brass: #C9A45C;

  --rail-w: 96px;
  --panel-pad: clamp(20px, 2.6vw, 36px);
  --gap: clamp(16px, 2.4vw, 28px);
  --ease: cubic-bezier(.2, .7, .3, 1);

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

/* 3. 基础版式 */
body {
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.72;
  color: var(--warm);
  background-color: var(--ink-900);
  background-image:
    repeating-linear-gradient(to right, rgba(28, 64, 93, .30) 0 1px, transparent 1px 96px),
    repeating-linear-gradient(to bottom, rgba(28, 64, 93, .22) 0 1px, transparent 1px 96px),
    radial-gradient(1000px 620px at 88% -10%, rgba(79, 175, 158, .13), transparent 62%),
    radial-gradient(820px 560px at -8% 106%, rgba(242, 107, 43, .09), transparent 60%);
  min-height: 100vh;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--warm);
}
h2 { font-size: clamp(26px, 3.4vw, 40px); }
h3 { font-size: clamp(20px, 2.2vw, 24px); font-weight: 800; }
p { color: inherit; }

.display {
  font-size: clamp(40px, 7.2vw, 96px);
  font-weight: 900;
  line-height: 1.02;
  letter-spacing: -0.035em;
}
.display--sm { font-size: clamp(32px, 4.6vw, 56px); letter-spacing: -0.03em; }
.lead { font-size: clamp(16px, 1.5vw, 18px); line-height: 1.78; color: #CFDCE7; }
.mono { font-family: var(--mono); font-variant-numeric: tabular-nums; letter-spacing: .02em; }
.num { font-family: var(--mono); font-variant-numeric: tabular-nums; letter-spacing: .02em; }

.eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--celadon);
}
.annot {
  writing-mode: vertical-rl;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .42em;
  text-transform: uppercase;
  color: var(--slate);
}
.sr-only {
  position: absolute; width: 1px; height: 1px;
  margin: -1px; padding: 0; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip-link {
  position: fixed;
  top: 10px; left: 10px;
  z-index: 200;
  padding: 10px 16px;
  background: var(--orange);
  color: var(--ink-900);
  font-weight: 700;
  font-size: 14px;
  border-radius: 2px;
  transform: translateY(-180%);
  transition: transform .2s var(--ease);
}
.skip-link:focus { transform: translateY(0); }

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

/* 4. 布局容器与网格 */
.wrap {
  width: 100%;
  max-width: 1240px;
  margin-inline: auto;
  padding-inline: clamp(18px, 4vw, 48px);
}
.section { padding-block: clamp(48px, 6vw, 88px); position: relative; }
.section--tight { padding-block: clamp(28px, 3.6vw, 52px); }
.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 20px;
  margin-bottom: clamp(20px, 2.6vw, 34px);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--ink-700);
}
.stack > * + * { margin-top: var(--gap); }
.cluster { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.grid { display: grid; gap: var(--gap); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--7-5 { grid-template-columns: 7fr 5fr; }
.grid--8-4 { grid-template-columns: 8fr 4fr; }
.grid--index { grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); }

/* 5. 画板面板 */
.panel {
  position: relative;
  padding: var(--panel-pad);
  border: 1px solid var(--ink-700);
  background: var(--ink-800);
  border-radius: 2px;
}
.panel--glass {
  background: rgba(17, 43, 66, .58);
  border-color: rgba(28, 64, 93, .95);
  -webkit-backdrop-filter: blur(10px) saturate(130%);
  backdrop-filter: blur(10px) saturate(130%);
}
.panel--paper {
  background: var(--paper);
  color: var(--ink-900);
  border-color: #DDD3C0;
}
.panel--paper h2, .panel--paper h3, .panel--paper h4 { color: var(--ink-900); }
.panel--paper p { color: #20374A; }
.panel--paper .eyebrow { color: var(--celadon-deep); }
.panel--paper .lead { color: #2A4154; }
.panel__label {
  display: inline-block;
  margin-bottom: 14px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--brass);
}

/* 6. 档案标签与状态 */
.plate {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 11px;
  border: 1px solid rgba(201, 164, 92, .55);
  background: rgba(201, 164, 92, .08);
  color: var(--brass);
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .2em;
  text-transform: uppercase;
  white-space: nowrap;
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: 1px solid var(--ink-700);
  background: rgba(10, 25, 41, .65);
  color: var(--slate);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .08em;
  white-space: nowrap;
}
.chip--ok { color: var(--celadon); border-color: rgba(79, 175, 158, .5); background: rgba(79, 175, 158, .12); }
.chip--rev { color: var(--brass); border-color: rgba(201, 164, 92, .5); background: rgba(201, 164, 92, .12); }
.chip--act { color: var(--orange-lift); border-color: rgba(242, 107, 43, .55); background: rgba(242, 107, 43, .12); }

/* 7. 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: 2px;
  font-size: 14.5px;
  font-weight: 700;
  letter-spacing: .02em;
  transition: background-color .2s var(--ease), color .2s var(--ease),
              border-color .2s var(--ease), transform .2s var(--ease);
}
.btn--primary { background: var(--orange); color: var(--ink-900); }
.btn--primary:hover { background: var(--orange-lift); transform: translateY(-1px); }
.btn--ghost {
  border-color: var(--ink-700);
  background: rgba(79, 175, 158, .07);
  color: var(--warm);
}
.btn--ghost:hover { border-color: var(--celadon); background: rgba(79, 175, 158, .16); color: #FFFFFF; }
.btn--quiet {
  border-color: transparent;
  color: var(--celadon);
  padding-inline: 4px;
  text-decoration: underline;
  text-decoration-color: rgba(79, 175, 158, .5);
  text-underline-offset: 5px;
}
.btn--quiet:hover { color: var(--orange-lift); text-decoration-color: var(--orange); }
.btn--sm { padding: 8px 15px; font-size: 13px; }

/* 8. 面包屑 */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--slate);
}
.crumbs a { color: var(--slate); transition: color .18s var(--ease); }
.crumbs a:hover { color: var(--orange-lift); }
.crumbs__sep { color: var(--ink-700); }
.crumbs [aria-current="page"] { color: var(--warm); }

/* 9. 表格 */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--ink-700);
  background: rgba(17, 43, 66, .5);
}
.data-table { min-width: 560px; font-size: 14px; }
.data-table th {
  position: sticky;
  top: 0;
  padding: 12px 14px;
  text-align: left;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--celadon);
  background: rgba(5, 13, 21, .92);
  border-bottom: 1px solid var(--ink-700);
  white-space: nowrap;
}
.data-table td {
  padding: 12px 14px;
  color: #DCE6EF;
  border-bottom: 1px solid rgba(28, 64, 93, .7);
  vertical-align: top;
}
.data-table tbody tr { transition: background-color .18s var(--ease); }
.data-table tbody tr:hover { background: rgba(79, 175, 158, .09); }
.data-table tbody tr:last-child td { border-bottom: 0; }

/* 10. 图片容器基础 */
.media-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--ink-700);
  background: linear-gradient(150deg, rgba(17, 43, 66, .95), rgba(5, 13, 21, .98));
  aspect-ratio: 16 / 10;
}
.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(to right, rgba(79, 175, 158, .16) 0 1px, transparent 1px 28px),
    repeating-linear-gradient(to bottom, rgba(79, 175, 158, .12) 0 1px, transparent 1px 28px);
  opacity: .55;
  pointer-events: none;
}
.media-frame > img,
.media-frame > svg {
  position: relative;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame--map { background: linear-gradient(160deg, rgba(47, 122, 109, .38), rgba(5, 13, 21, .98)); }
.media-frame--device { background: linear-gradient(140deg, rgba(28, 64, 93, .95), rgba(10, 25, 41, .98)); }
.media-frame--table { background: linear-gradient(180deg, rgba(201, 164, 92, .18), rgba(5, 13, 21, .98)); }
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 4 / 5; }
.media-frame__tag {
  position: absolute;
  left: 12px;
  bottom: 11px;
  padding: 4px 9px;
  border-left: 2px solid var(--brass);
  background: rgba(5, 13, 21, .78);
  color: var(--slate);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .2em;
  text-transform: uppercase;
}

/* 11. 显现协议 */
.js .reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .5s var(--ease), transform .5s var(--ease);
}
.js .reveal[data-inview="true"] { opacity: 1; transform: none; }

/* 12. 头部框架 */
.site-header { position: relative; z-index: 60; }

.status-band {
  background: var(--ink-950);
  border-bottom: 1px solid var(--ink-700);
  color: var(--slate);
}
.status-band__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 6px 24px;
  max-width: 1360px;
  margin-inline: auto;
  padding: 8px clamp(16px, 3vw, 32px);
}
.status-band__item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--slate);
}
.status-band__dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--celadon);
  box-shadow: 0 0 0 3px rgba(79, 175, 158, .18);
  flex: none;
}
.status-band__link {
  color: var(--brass);
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.status-band__link:hover { color: var(--orange-lift); border-bottom-color: var(--orange-lift); }

/* 左缘框架带 */
.rail { display: none; }

/* 主条 */
.header-bar {
  position: sticky;
  top: 0;
  z-index: 70;
  display: flex;
  align-items: center;
  gap: clamp(12px, 2.2vw, 34px);
  padding: 12px clamp(16px, 3vw, 32px);
  background: rgba(10, 25, 41, .84);
  border-bottom: 1px solid var(--ink-700);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  backdrop-filter: blur(14px) saturate(140%);
}
.brand {
  display: flex;
  flex-direction: column;
  gap: 1px;
  padding-right: clamp(10px, 2vw, 26px);
  border-right: 1px solid var(--ink-700);
}
.brand__mark {
  font-size: 21px;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--warm);
  line-height: 1.1;
}
.brand__tag {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .22em;
  color: var(--celadon);
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 2px;
  margin-left: auto;
}
.site-nav__link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 9px 11px;
  font-size: 14.5px;
  font-weight: 500;
  color: #D3DFEA;
  border-radius: 2px;
  transition: color .18s var(--ease), background-color .18s var(--ease);
}
.site-nav__num {
  font-size: 9.5px;
  letter-spacing: .14em;
  color: var(--celadon-deep);
  transition: color .18s var(--ease);
}
.site-nav__link::after {
  content: "";
  position: absolute;
  left: 11px; right: 11px; bottom: 3px;
  height: 2px;
  background: var(--orange);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .2s var(--ease);
}
.site-nav__link:hover { color: #FFFFFF; background: rgba(79, 175, 158, .08); }
.site-nav__link:hover::after { transform: scaleX(1); }
.site-nav__link:hover .site-nav__num { color: var(--celadon); }
.site-nav__link[aria-current="page"] { color: var(--warm); background: rgba(242, 107, 43, .1); }
.site-nav__link[aria-current="page"]::after { transform: scaleX(1); }
.site-nav__link[aria-current="page"] .site-nav__num { color: var(--orange); }
.site-nav__cta { margin-left: 10px; }
.site-nav__cta::after { display: none; }

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  margin-left: auto;
  padding: 9px 13px;
  border: 1px solid var(--ink-700);
  background: rgba(17, 43, 66, .8);
  color: var(--warm);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  transition: border-color .18s var(--ease), color .18s var(--ease);
}
.nav-toggle:hover { border-color: var(--celadon); color: #FFFFFF; }
.nav-toggle__bars {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 17px;
  height: 12px;
}
.nav-toggle__bars span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--orange);
  transition: transform .2s var(--ease), opacity .2s var(--ease);
}
.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); }

/* 13. 页脚 */
.site-footer {
  margin-top: clamp(56px, 8vw, 112px);
  background: linear-gradient(180deg, var(--ink-950) 0%, #04080E 100%);
  border-top: 1px solid var(--ink-700);
  color: var(--slate);
}
.footer-top {
  display: grid;
  grid-template-columns: 1.6fr repeat(3, minmax(0, .82fr)) 1.5fr;
  gap: clamp(22px, 3vw, 44px);
  max-width: 1360px;
  margin-inline: auto;
  padding: clamp(38px, 5.5vw, 70px) clamp(18px, 4vw, 48px) clamp(26px, 3.4vw, 44px);
}
.footer-brand__mark {
  font-size: clamp(24px, 2.4vw, 30px);
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--warm);
  line-height: 1.1;
}
.footer-brand__desc {
  margin-top: 12px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--slate);
  max-width: 30ch;
}
.footer-brand__cta { margin-top: 18px; }

.footer-col__title {
  padding-bottom: 10px;
  margin-bottom: 12px;
  border-bottom: 1px solid rgba(28, 64, 93, .9);
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--celadon);
}
.footer-col__list { display: grid; gap: 9px; }
.footer-col__link {
  position: relative;
  padding-left: 13px;
  font-size: 14.5px;
  color: #CBD8E3;
  transition: color .18s var(--ease), padding-left .18s var(--ease);
}
.footer-col__link::before {
  content: "";
  position: absolute;
  left: 0; top: .72em;
  width: 6px; height: 1px;
  background: var(--ink-700);
  transition: width .18s var(--ease), background-color .18s var(--ease);
}
.footer-col__link:hover { color: var(--orange-lift); padding-left: 17px; }
.footer-col__link:hover::before { width: 10px; background: var(--orange); }

.footer-contact { display: grid; gap: 9px; align-content: start; }
.footer-contact .footer-col__title { margin-bottom: 4px; }
.copy-line {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 9px 10px;
  border: 1px solid rgba(28, 64, 93, .9);
  background: rgba(10, 25, 41, .6);
  text-align: left;
  transition: border-color .18s var(--ease), background-color .18s var(--ease);
}
.copy-line:hover { border-color: var(--celadon); background: rgba(79, 175, 158, .1); }
.copy-line__key {
  font-size: 9.5px;
  letter-spacing: .18em;
  color: var(--brass);
  flex: none;
}
.copy-line__val {
  flex: 1;
  font-size: 12.5px;
  color: var(--warm);
  overflow-wrap: anywhere;
}
.copy-line__hint {
  flex: none;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .14em;
  color: var(--slate);
}
.copy-line[data-copied="true"] .copy-line__hint { color: var(--celadon); }
.footer-contact__addr {
  font-size: 13.5px;
  line-height: 1.65;
  color: #C4D2DE;
  padding-top: 4px;
}
.footer-contact__note {
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--slate);
}
.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 22px;
  max-width: 1360px;
  margin-inline: auto;
  padding: 16px clamp(18px, 4vw, 48px) 26px;
  border-top: 1px solid rgba(28, 64, 93, .8);
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--slate);
}
.footer-legal__group { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.footer-legal__icp { color: var(--brass); }
.footer-legal__sep { color: var(--ink-700); }
.footer-legal__link { color: var(--slate); transition: color .18s var(--ease); }
.footer-legal__link:hover { color: var(--orange-lift); }

/* 14. 滚动进度与返回顶部（JS 注入） */
.scroll-progress {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 2px;
  z-index: 120;
  background: linear-gradient(90deg, var(--celadon), var(--orange));
  transform: scaleX(0);
  transform-origin: 0 50%;
  pointer-events: none;
}
.to-top {
  position: fixed;
  right: clamp(14px, 2vw, 26px);
  bottom: clamp(14px, 2vw, 26px);
  z-index: 110;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border: 1px solid var(--ink-700);
  background: rgba(17, 43, 66, .92);
  color: var(--warm);
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .16em;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity .22s var(--ease), transform .22s var(--ease),
              border-color .18s var(--ease), color .18s var(--ease), visibility .22s;
}
.to-top[data-visible="true"] { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { border-color: var(--orange); color: var(--orange-lift); }

/* 15. 响应式 */
@media (min-width: 1180px) {
  body { padding-left: var(--rail-w); }
  .rail {
    display: flex;
    position: fixed;
    left: 0; top: 0; bottom: 0;
    width: var(--rail-w);
    z-index: 90;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    padding: 20px 0 26px;
    background: linear-gradient(180deg, rgba(17, 43, 66, .97) 0%, rgba(5, 13, 21, .99) 100%);
    border-right: 1px solid var(--ink-700);
  }
  .rail__code {
    font-size: 10px;
    letter-spacing: .26em;
    color: var(--brass);
    writing-mode: vertical-rl;
  }
  .rail__line {
    flex: 1;
    width: 1px;
    margin: 16px 0;
    background: repeating-linear-gradient(to bottom, var(--ink-700) 0 5px, transparent 5px 12px);
  }
  .rail__text {
    writing-mode: vertical-rl;
    font-family: var(--mono);
    font-size: 10.5px;
    letter-spacing: .34em;
    text-transform: uppercase;
    color: var(--slate);
  }
  .rail__ticks {
    width: 1px;
    height: 54px;
    margin-top: 18px;
    background: repeating-linear-gradient(to bottom, var(--celadon-deep) 0 4px, transparent 4px 11px);
  }
}

@media (max-width: 1079px) {
  .nav-toggle { display: inline-flex; }
  .brand { border-right: 0; padding-right: 0; }
  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin-left: 0;
    padding: 0 clamp(16px, 4vw, 24px);
    background: rgba(6, 18, 30, .985);
    border-bottom: 1px solid var(--ink-700);
    max-height: 0;
    opacity: 0;
    visibility: hidden;
    overflow: hidden;
    transition: max-height .26s var(--ease), opacity .2s var(--ease),
                padding .26s var(--ease), visibility .26s;
  }
  .site-nav[data-open="true"] {
    max-height: 78vh;
    opacity: 1;
    visibility: visible;
    overflow-y: auto;
    padding: 10px clamp(16px, 4vw, 24px) 22px;
  }
  .site-nav__link {
    padding: 14px 4px;
    font-size: 16px;
    border-bottom: 1px solid rgba(28, 64, 93, .7);
    border-radius: 0;
  }
  .site-nav__link::after { left: 4px; right: auto; width: 28px; bottom: 8px; }
  .site-nav__link[aria-current="page"] { background: rgba(242, 107, 43, .08); }
  .site-nav__num { font-size: 10.5px; }
  .site-nav__cta {
    margin: 16px 0 0;
    justify-content: center;
    border-bottom: 0;
  }
}

@media (max-width: 900px) {
  .status-band__item--hide { display: none; }
  .grid--2, .grid--3, .grid--7-5, .grid--8-4 { grid-template-columns: minmax(0, 1fr); }
  .footer-top { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-brand { grid-column: 1 / -1; }
  .footer-contact { grid-column: 1 / -1; }
}

@media (max-width: 560px) {
  body { font-size: 16px; }
  .footer-top { grid-template-columns: minmax(0, 1fr); }
  .footer-legal { flex-direction: column; align-items: flex-start; }
  .data-table { min-width: 480px; font-size: 13px; }
  .to-top { padding: 9px 12px; }
}

/* 16. 动效降级 */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
  .js .reveal { opacity: 1; transform: none; }
}