/* ==========================================================================
   半岛体育 · 共享站点样式（/assets/site.css）
   深海蓝蓝图网格 · 熔岩橙与荧光青脉冲 · 大圆角胶囊
   ========================================================================== */

/* ---------- 1. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body, h1, h2, h3, h4, h5, p, ul, ol, li, figure, blockquote, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video { max-width: 100%; display: block; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: inherit; }
table { border-collapse: collapse; width: 100%; }

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

/* ---------- 2. 设计变量 ---------- */
:root {
  --deep-900: #071426;
  --deep-700: #0E2745;
  --line-blue: #1D3F66;
  --lava-500: #FF6A2B;
  --lava-700: #C8471A;
  --cyan-400: #21E6C1;
  --cyan-100: #B9F7EC;
  --night: #04070D;
  --silver: #C7D0DB;
  --porcelain: #F5F8FB;

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

  --ease: cubic-bezier(.2, .8, .2, 1);
  --grid-cell: 24px;
  --wrap-width: 1240px;
  --radius-card: 26px;
  --radius-lg: 30px;
  --radius-pill: 999px;
  --space-section: 96px;

  --line-soft: rgba(29, 63, 102, .9);
  --line-faint: rgba(29, 63, 102, .55);
  --outline-silver: rgba(199, 208, 219, .42);
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  background-color: var(--deep-900);
  background-image:
    radial-gradient(1200px 620px at 12% -12%, rgba(33, 230, 193, .10), transparent 62%),
    radial-gradient(980px 560px at 92% -4%, rgba(255, 106, 43, .10), transparent 64%),
    repeating-linear-gradient(to right, rgba(29, 63, 102, .40) 0 1px, transparent 1px var(--grid-cell)),
    repeating-linear-gradient(to bottom, rgba(29, 63, 102, .40) 0 1px, transparent 1px var(--grid-cell));
  background-repeat: no-repeat, no-repeat, repeat, repeat;
  color: var(--silver);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.85;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  color: var(--porcelain);
  font-weight: 400;
  line-height: 1.25;
  letter-spacing: -.01em;
}

a { text-decoration: none; }

.wrap {
  width: min(var(--wrap-width), 100% - 48px);
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -80px;
  z-index: 200;
  display: inline-block;
  padding: 10px 18px;
  border-radius: 0 0 14px 14px;
  background: var(--cyan-400);
  color: var(--night);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  transition: top .2s var(--ease);
}
.skip-link:focus { top: 0; }

:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ---------- 4. 通用排版原子 ---------- */
.display {
  font-size: clamp(46px, 7vw, 108px);
  font-weight: 300;
  letter-spacing: -.02em;
  line-height: 1.02;
  color: var(--porcelain);
  margin: 0;
}

.section {
  padding: var(--space-section) 0;
  position: relative;
}

.section-head {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 10px 24px;
  align-items: baseline;
  margin-bottom: 40px;
}

.index-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--cyan-400);
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--cyan-100);
  margin: 0;
}

.section-title {
  font-size: clamp(26px, 3vw, 42px);
  font-weight: 400;
  color: var(--porcelain);
  margin: 0;
}

.section-note {
  max-width: 34em;
  font-size: 16px;
  color: var(--silver);
  margin: 0;
}

.prose { max-width: 34em; }
.prose p { margin-bottom: 1.1em; }
.prose p:last-child { margin-bottom: 0; }
.prose strong { color: var(--cyan-100); font-weight: 600; }

.divider {
  border: 0;
  height: 1px;
  background: linear-gradient(90deg, rgba(29, 63, 102, 0), rgba(29, 63, 102, .95), rgba(29, 63, 102, 0));
}

/* ---------- 5. 蓝图网格 ---------- */
.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 24px;
}
.col-main { grid-column: 1 / span 7; }
.col-aside { grid-column: 9 / span 4; }
.col-full { grid-column: 1 / -1; }

/* ---------- 6. 状态条 ---------- */
.status-strip {
  background: var(--night);
  border-bottom: 1px solid var(--line-blue);
  overflow: hidden;
}
.status-strip__track {
  display: flex;
  width: max-content;
  animation: strip-scroll 40s linear infinite;
}
.status-strip__group {
  display: flex;
  align-items: center;
  gap: 44px;
  padding: 9px 44px;
}
.status-strip__item {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  white-space: nowrap;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--silver);
}
.status-strip__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan-400);
  box-shadow: 0 0 0 4px rgba(33, 230, 193, .16);
  animation: dot-pulse 2.4s var(--ease) infinite;
}

@keyframes strip-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}
@keyframes dot-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .45; transform: scale(.78); }
}

/* ---------- 7. 页头 / 刊头 ---------- */
.site-header {
  position: relative;
  z-index: 60;
  background: linear-gradient(180deg, rgba(7, 20, 38, .96), rgba(7, 20, 38, .74));
  border-bottom: 1px solid var(--line-faint);
}

.masthead { position: relative; }

.masthead__inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  grid-template-areas: "side brand cta";
  align-items: center;
  gap: 16px;
  padding: 26px 0 10px;
}

.masthead__side {
  grid-area: side;
  justify-self: start;
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.masthead__meta {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cyan-100);
  white-space: nowrap;
}

.brand {
  grid-area: brand;
  justify-self: center;
  display: block;
  text-align: center;
  padding: 2px 8px;
}
.brand__name {
  display: block;
  font-size: clamp(26px, 3.6vw, 44px);
  font-weight: 300;
  letter-spacing: -.02em;
  line-height: 1.05;
  color: var(--porcelain);
  transition: color .18s var(--ease);
}
.brand__sub {
  display: block;
  margin-top: 7px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cyan-100);
}
.brand:hover .brand__name { color: var(--cyan-100); }

.masthead__cta {
  grid-area: cta;
  justify-self: end;
  white-space: nowrap;
}

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 8px 14px;
  border: 1px solid var(--outline-silver);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--silver);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  cursor: pointer;
  transition: border-color .2s var(--ease), color .2s var(--ease);
}
.nav-toggle:hover { border-color: var(--cyan-400); color: var(--porcelain); }
.nav-toggle__bar {
  position: relative;
  display: block;
  width: 14px;
  height: 1px;
  background: currentColor;
}
.nav-toggle__bar::before,
.nav-toggle__bar::after {
  content: "";
  position: absolute;
  left: 0;
  width: 14px;
  height: 1px;
  background: currentColor;
  transition: transform .2s var(--ease), top .2s var(--ease);
}
.nav-toggle__bar::before { top: -5px; }
.nav-toggle__bar::after { top: 5px; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar::before { top: 0; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar::after { top: 0; transform: rotate(-45deg); }

/* 刊头栏目导航 */
.mast-nav {
  display: flex;
  justify-content: center;
  padding: 4px 0 16px;
}
.mast-nav__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 4px 34px;
}
.mast-nav__link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 6px 2px;
  font-size: 14px;
  letter-spacing: .08em;
  color: var(--silver);
  transition: color .18s var(--ease);
}
.mast-nav__num {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .16em;
  color: var(--line-blue);
  transition: color .18s var(--ease);
}
.mast-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: 2px;
  height: 1px;
  background: var(--cyan-400);
  transition: right .18s var(--ease);
}
.mast-nav__link:hover { color: var(--porcelain); }
.mast-nav__link:hover::after { right: 0; }
.mast-nav__link:hover .mast-nav__num { color: var(--cyan-400); }
.mast-nav__link[aria-current="page"] { color: var(--porcelain); }
.mast-nav__link[aria-current="page"]::after { right: 0; background: var(--lava-500); }
.mast-nav__link[aria-current="page"] .mast-nav__num { color: var(--lava-500); }

/* 滚动进度 */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  z-index: 120;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan-400), var(--lava-500));
  pointer-events: none;
}

/* ---------- 8. 页脚 ---------- */
.site-footer {
  position: relative;
  overflow: hidden;
  background: var(--night);
  border-top: 1px solid rgba(29, 63, 102, .85);
  color: var(--silver);
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(760px 340px at 10% 0%, rgba(33, 230, 193, .10), transparent 66%),
    radial-gradient(660px 320px at 100% 100%, rgba(255, 106, 43, .10), transparent 62%);
  pointer-events: none;
}
.footer__inner {
  position: relative;
  padding: 76px 0 34px;
}
.footer__top {
  display: grid;
  grid-template-columns: 1.15fr 2fr;
  gap: 48px;
}
.footer__brand-name {
  font-size: clamp(28px, 3.4vw, 44px);
  font-weight: 300;
  letter-spacing: -.02em;
  line-height: 1.1;
  color: var(--porcelain);
  margin-bottom: 14px;
}
.footer__brand-note {
  max-width: 26em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--silver);
  margin-bottom: 18px;
}
.footer__mono {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cyan-100);
}
.footer__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 32px;
}
.footer__col-title {
  margin-bottom: 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--lava-500);
}
.footer__list {
  display: grid;
  gap: 10px;
}
.footer__link {
  position: relative;
  display: inline-block;
  font-size: 15px;
  color: var(--silver);
  transition: color .18s var(--ease);
}
.footer__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: -2px;
  height: 1px;
  background: var(--cyan-400);
  transition: right .18s var(--ease);
}
.footer__link:hover { color: var(--porcelain); }
.footer__link:hover::after { right: 0; }

.footer__list--contact { gap: 12px; }
.footer__contact-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 10px;
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.6;
  letter-spacing: .02em;
  color: var(--silver);
}
.footer__contact-text { word-break: break-all; }

.copy-btn {
  padding: 3px 11px;
  border: 1px solid var(--outline-silver);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--silver);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  cursor: pointer;
  transition: border-color .2s var(--ease), color .2s var(--ease), background-color .2s var(--ease);
}
.copy-btn:hover { border-color: var(--cyan-400); color: var(--porcelain); }
.copy-btn[data-copied] {
  background: var(--cyan-400);
  border-color: var(--cyan-400);
  color: var(--night);
}

.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px 32px;
  margin-top: 56px;
  padding-top: 22px;
  border-top: 1px solid rgba(29, 63, 102, .85);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .05em;
  line-height: 1.75;
  color: rgba(199, 208, 219, .72);
}
.footer__legal { margin: 0; }
.footer__note { margin: 0; max-width: 62em; }

/* ---------- 9. 通用按钮与胶囊标签 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border: 1px solid transparent;
  border-radius: 14px;
  background: transparent;
  color: var(--porcelain);
  font-size: 13px;
  letter-spacing: .08em;
  cursor: pointer;
  transition: background-color .2s var(--ease), border-color .2s var(--ease), color .2s var(--ease), transform .16s var(--ease);
}
.btn--pill { border-radius: var(--radius-pill); }
.btn--accent {
  background: var(--lava-500);
  border-color: var(--lava-500);
  color: var(--night);
  font-weight: 600;
}
.btn--accent:hover { background: var(--lava-700); border-color: var(--lava-700); color: var(--porcelain); }
.btn--ghost {
  border-color: var(--outline-silver);
  color: var(--silver);
}
.btn--ghost:hover { border-color: var(--cyan-400); color: var(--porcelain); }
.btn:active { transform: translateY(1px); }

.pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
  box-shadow: 0 0 0 3px rgba(255, 106, 43, .22);
  animation: dot-pulse 2.2s var(--ease) infinite;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 15px;
  border: 1px solid var(--outline-silver);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--silver);
  font-size: 12.5px;
  letter-spacing: .1em;
  cursor: pointer;
  transition: background-color .2s var(--ease), border-color .2s var(--ease), color .2s var(--ease);
}
.tag:hover { border-color: var(--cyan-400); color: var(--porcelain); }
.tag.is-active,
.tag[aria-pressed="true"] {
  background: var(--lava-500);
  border-color: var(--lava-500);
  color: var(--night);
  font-weight: 600;
}
.tag--static { cursor: default; }

/* ---------- 10. 资料卡 ---------- */
.data-card {
  position: relative;
  display: block;
  padding: 26px 26px 30px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-card);
  background: linear-gradient(160deg, rgba(14, 39, 69, .92), rgba(7, 20, 38, .94));
  color: var(--silver);
  transition: border-color .16s var(--ease), transform .16s var(--ease);
}
.data-card:hover,
.data-card:focus-visible {
  border-color: var(--cyan-400);
  transform: translateY(-2px);
}
.data-card__tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border: 1px solid var(--outline-silver);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cyan-100);
}
.data-card__index {
  position: absolute;
  right: 26px;
  bottom: 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--line-blue);
}
.data-card__time {
  display: block;
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--lava-500);
}

/* ---------- 11. 数字组 ---------- */
.stat { display: block; }
.stat__value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(28px, 3.4vw, 44px);
  font-weight: 600;
  letter-spacing: -.01em;
  line-height: 1.1;
  color: var(--cyan-400);
}
.stat__label {
  display: block;
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--silver);
}

/* ---------- 12. 横向带 ---------- */
.band {
  display: flex;
  gap: 18px;
  padding: 4px 0 20px;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--line-blue) transparent;
}
.band > * {
  flex: 0 0 auto;
  scroll-snap-align: start;
}
.band::-webkit-scrollbar { height: 6px; }
.band::-webkit-scrollbar-track { background: transparent; }
.band::-webkit-scrollbar-thumb { background: var(--line-blue); border-radius: var(--radius-pill); }

/* ---------- 13. 图片容器（页面阶段放置占位） ---------- */
.media {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  background: linear-gradient(150deg, var(--deep-700), var(--deep-900));
  aspect-ratio: 16 / 9;
}
.media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.94) contrast(1.06);
}
.media--tall { aspect-ratio: 3 / 4; }
.media--square { aspect-ratio: 1 / 1; }
.media--wide { aspect-ratio: 21 / 9; }
.media__scrim {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(4, 7, 13, 0) 42%, rgba(4, 7, 13, .78));
  pointer-events: none;
}
.media__caption {
  position: absolute;
  left: 22px;
  right: 22px;
  bottom: 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--cyan-100);
}

/* ---------- 14. 手风琴 ---------- */
.accordion {
  padding: 0 22px;
  border: 1px solid var(--line-soft);
  border-radius: 20px;
  background: rgba(14, 39, 69, .55);
}
.accordion + .accordion { margin-top: 12px; }
.accordion > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
  font-size: 17px;
  color: var(--porcelain);
}
.accordion > summary::-webkit-details-marker { display: none; }
.accordion > summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 19px;
  color: var(--cyan-400);
  transition: transform .2s var(--ease);
}
.accordion[open] > summary::after {
  content: "–";
  transform: rotate(180deg);
}
.accordion__body {
  padding: 0 0 20px;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--silver);
}

/* ---------- 15. 面包屑 ---------- */
.breadcrumb { padding: 26px 0 0; }
.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--line-blue);
}
.breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: var(--line-blue);
}
.breadcrumb__item a {
  color: var(--silver);
  transition: color .18s var(--ease);
}
.breadcrumb__item a:hover { color: var(--cyan-400); }
.breadcrumb__item[aria-current="page"] { color: var(--cyan-400); }

/* ---------- 16. 动效与状态 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .5s var(--ease), transform .5s var(--ease);
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}
.is-hidden { display: none !important; }

/* ---------- 17. 响应式 ---------- */
@media (max-width: 1100px) {
  .footer__top { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 900px) {
  :root { --space-section: 72px; }

  .grid-12 { grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 20px; }
  .col-main,
  .col-aside,
  .col-full { grid-column: 1 / -1; }

  .masthead__inner {
    grid-template-columns: 1fr auto 1fr;
    grid-template-areas: "side brand cta";
    align-items: center;
    padding: 16px 0 6px;
  }
  .nav-toggle { display: inline-flex; }
  .masthead__meta { display: none; }

  .mast-nav {
    display: block;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    z-index: 70;
    padding: 6px 0 20px;
    background: rgba(7, 20, 38, .985);
    border-bottom: 1px solid var(--line-soft);
    box-shadow: 0 28px 56px rgba(4, 7, 13, .7);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity .2s var(--ease), transform .2s var(--ease), visibility .2s var(--ease);
  }
  .mast-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: none;
  }
  .mast-nav__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0;
    padding: 0 24px;
    width: 100%;
  }
  .mast-nav__item { border-bottom: 1px solid var(--line-faint); }
  .mast-nav__item:last-child { border-bottom: 0; }
  .mast-nav__link {
    display: flex;
    width: 100%;
    padding: 16px 0;
    font-size: 16px;
  }
  .mast-nav__link::after { display: none; }
  .mast-nav__num { font-size: 11px; color: var(--cyan-400); }

  .footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px; }
  .footer__inner { padding: 60px 0 30px; }
}

@media (max-width: 640px) {
  body { font-size: 16px; line-height: 1.8; }

  .wrap { width: calc(100% - 32px); }

  .section { padding: 64px 0; }
  .section-head { grid-template-columns: 1fr; gap: 8px; }

  .status-strip__group { gap: 28px; padding: 8px 28px; }
  .status-strip__item { font-size: 10px; letter-spacing: .12em; }

  .masthead__inner { gap: 8px; padding: 14px 0 4px; }
  .brand__name { font-size: 22px; }
  .brand__sub { margin-top: 5px; font-size: 9px; letter-spacing: .1em; }
  .brand { padding: 0 4px; }
  .masthead__cta { padding: 8px 12px; font-size: 12px; letter-spacing: .04em; }
  .nav-toggle { padding: 7px 11px; }
  .nav-toggle__label { display: none; }

  .footer__grid { grid-template-columns: 1fr; }
  .footer__bottom { flex-direction: column; margin-top: 40px; font-size: 12px; }
  .footer__brand-name { font-size: 30px; }

  .mast-nav__list { padding: 0 16px; }
}

/* ---------- 18. 键盘与动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
  .status-strip__track { animation: none; transform: none; }
  .status-strip__group[aria-hidden="true"] { display: none; }
  .reveal { opacity: 1; transform: none; }
  .data-card:hover,
  .data-card:focus-visible { transform: none; }
}