/* ============================================================
   AB体育 · 共享站点套件  /assets/site.css
   深空炭黑 + 深靛蓝基底 / 电子青主强调 / 切角面板 / 等宽索引
   ============================================================ */

:root {
  --ink-900: #070B1A;
  --ink-800: #0C1533;
  --line: #26355F;
  --slate: #A9B6D3;
  --white: #F2F6FF;
  --cyan: #26E0FF;
  --amber: #FFB13B;
  --acid: #B6FF3B;
  --coral: #FF7A7A;
  --mauve: #7C8AA8;

  --font-heading: Sora, "Space Grotesk", "HarmonyOS Sans SC", "Noto Sans SC", sans-serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", "SFMono-Regular", Consolas, monospace;

  --shell: 1320px;
  --gutter: clamp(16px, 4vw, 48px);
  --cut: 18px;
  --ease: cubic-bezier(.2, .7, .3, 1);
}

/* ---------- reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body {
  margin: 0;
  min-height: 100%;
  background-color: var(--ink-900);
  background-image:
    radial-gradient(1100px 560px at 88% -8%, rgba(38, 224, 255, .10), transparent 62%),
    radial-gradient(900px 520px at -6% 24%, rgba(255, 177, 59, .055), transparent 62%);
  background-attachment: fixed;
  color: var(--white);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 28px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.nav-open { overflow: hidden; }

img,
svg,
video { max-width: 100%; }

button { font: inherit; }

/* ---------- 中文排版与基础元素 ---------- */
h1, h2, h3, h4 {
  margin: 0 0 .62em;
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.16;
  letter-spacing: -.012em;
  color: var(--white);
}

h1 { font-size: clamp(34px, 5vw, 48px); line-height: 1.14; }
h2 { font-size: clamp(24px, 3.2vw, 32px); line-height: 1.25; }
h3 { font-size: clamp(19px, 2.2vw, 24px); line-height: 1.33; }
h4 { font-size: 17px; line-height: 1.45; font-weight: 600; }

p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

a { color: var(--cyan); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: #7BEEFF; }

ul, ol { margin: 0 0 1em; padding-left: 20px; }
li { margin-bottom: .35em; }

strong { color: var(--white); font-weight: 600; }

::selection { background: rgba(38, 224, 255, .32); color: var(--white); }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  border-radius: 0;
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- 工具类 ---------- */
.mono {
  font-family: var(--font-mono);
  font-weight: 500;
  letter-spacing: .06em;
}

.index-num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .16em;
  color: var(--amber);
}

.wrap {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.section { padding: clamp(40px, 6vw, 88px) 0; }
.section--tight { padding: clamp(28px, 4vw, 52px) 0; }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 14px 28px;
  margin-bottom: clamp(20px, 3vw, 36px);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.eyebrow::before {
  content: "";
  display: block;
  width: 26px;
  height: 1px;
  background: var(--cyan);
  flex: none;
}

/* ---------- 网格 ---------- */
.grid {
  display: grid;
  gap: clamp(18px, 2.4vw, 32px);
}

.grid--editorial {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
  grid-template-columns: minmax(0, 3fr) minmax(0, 7fr) minmax(0, 2fr);
  align-items: start;
}

.grid--halves {
  display: grid;
  gap: clamp(18px, 2.6vw, 32px);
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.note-col {
  border-left: 1px solid var(--line);
  padding-left: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 20px;
  letter-spacing: .02em;
  color: var(--mauve);
}

.note-col strong { color: var(--slate); font-weight: 500; }

/* ---------- 面板 / 数据带 / 图形语言 ---------- */
.panel {
  position: relative;
  padding: clamp(20px, 3vw, 32px);
  background: linear-gradient(155deg, rgba(12, 21, 51, .96), rgba(9, 15, 38, .96));
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
}

.panel--flush { padding: 0; }

.panel--accent { border-color: rgba(38, 224, 255, .45); }

.data-band {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(90deg, rgba(12, 21, 51, .96), rgba(7, 11, 26, .96));
  padding: clamp(20px, 3vw, 34px) 0;
}

.hatch {
  height: 10px;
  background: repeating-linear-gradient(115deg, rgba(38, 224, 255, .22) 0 2px, transparent 2px 9px);
}

.metric { display: block; }
.metric__value {
  display: block;
  font-family: var(--font-heading);
  font-size: clamp(34px, 5vw, 62px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--white);
}
.metric__unit { font-size: .42em; font-weight: 600; color: var(--cyan); margin-left: .18em; }
.metric__label {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--mauve);
}

/* ---------- 媒体容器基础规则 ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: linear-gradient(150deg, #0C1533 0%, #12203F 52%, #070B1A 100%);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .55;
  background-image:
    linear-gradient(rgba(38, 224, 255, .09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(38, 224, 255, .09) 1px, transparent 1px);
  background-size: 38px 38px;
}

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

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

.media-frame__tag {
  position: absolute;
  left: 14px;
  bottom: 14px;
  z-index: 2;
  padding: 5px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--ink-900);
  background: var(--amber);
}

/* ---------- 正文容器 ---------- */
.prose {
  max-width: 70ch;
  color: var(--slate);
  font-size: 16px;
  line-height: 28px;
}

.prose > h2,
.prose > h3 { color: var(--white); margin-top: 1.7em; }
.prose > h2:first-child,
.prose > h3:first-child { margin-top: 0; }
.prose a { color: var(--cyan); }
.prose ul, .prose ol { color: var(--slate); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .05em;
  line-height: 1;
  color: var(--white);
  background: transparent;
  border: 1px solid var(--line);
  text-decoration: none;
  cursor: pointer;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  transition: color .22s var(--ease), background-color .22s var(--ease), border-color .22s var(--ease), box-shadow .22s var(--ease), transform .22s var(--ease);
}

.btn:hover { border-color: var(--cyan); color: var(--cyan); transform: translateY(-1px); }

.btn--primary {
  color: #04121B;
  background: var(--cyan);
  border-color: var(--cyan);
  font-weight: 600;
}
.btn--primary:hover {
  color: #04121B;
  background: #66EDFF;
  border-color: #66EDFF;
  box-shadow: 0 10px 26px -14px rgba(38, 224, 255, .95);
}

.btn--ghost { color: var(--slate); border-color: var(--line); }
.btn--ghost:hover { color: var(--white); border-color: var(--cyan); }

.btn--sm { padding: 9px 14px; font-size: 12px; }

.btn:focus-visible {
  outline: none;
  box-shadow: inset 0 0 0 2px var(--acid), 0 0 0 2px rgba(182, 255, 59, .3);
}

/* ---------- chips ---------- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--slate);
  background: rgba(12, 21, 51, .8);
  border: 1px solid var(--line);
  text-decoration: none;
  cursor: pointer;
  transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);
}
.chip:hover { color: var(--white); border-color: rgba(38, 224, 255, .55); }
.chip[aria-pressed="true"],
.chip.is-active {
  color: #04121B;
  background: var(--cyan);
  border-color: var(--cyan);
  font-weight: 600;
}

/* ---------- 面包屑 ---------- */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 16px 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--mauve);
}
.breadcrumbs__item { margin: 0; }
.breadcrumbs__item a { color: var(--slate); text-decoration: none; }
.breadcrumbs__item a:hover { color: var(--cyan); }
.breadcrumbs__item[aria-current="page"] { color: var(--white); }
.breadcrumbs__sep { color: var(--line); }

/* ---------- 标签页 ---------- */
.tabs { position: relative; }

.tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 clamp(18px, 2.4vw, 28px);
  padding: 0 0 14px;
  border-bottom: 1px solid var(--line);
}

.tab {
  padding: 10px 16px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--slate);
  background: transparent;
  border: 1px solid var(--line);
  cursor: pointer;
  transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease), box-shadow .2s var(--ease);
}

.tab:hover { color: var(--white); border-color: rgba(38, 224, 255, .5); }

.tab[aria-selected="true"] {
  color: var(--cyan);
  background: rgba(38, 224, 255, .1);
  border-color: var(--cyan);
  box-shadow: inset 0 -2px 0 var(--cyan);
}

.tab-panel { padding-top: 4px; }
.tab-panel[hidden] { display: none; }

/* ---------- 滚动进度 ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: 90;
  pointer-events: none;
}

.scroll-progress__bar {
  display: block;
  height: 100%;
  width: 100%;
  transform: scaleX(0);
  transform-origin: left center;
  background: linear-gradient(90deg, var(--cyan), var(--amber));
}

/* ---------- 显现 ---------- */
.js-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .55s ease, transform .55s var(--ease);
}
.js-reveal [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- skip link ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 200;
  transform: translateY(-220%);
  padding: 12px 18px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .04em;
  color: #04121B;
  background: var(--cyan);
  text-decoration: none;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
  transition: transform .2s var(--ease);
}
.skip-link:focus { transform: translateY(0); color: #04121B; }

/* ============================================================
   页头
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: var(--ink-900);
}

.header-rail {
  background: var(--ink-900);
  border-bottom: 1px solid rgba(38, 53, 95, .6);
}

.header-rail__inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter);
  min-height: 54px;
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.4vw, 32px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--white);
  text-decoration: none;
  flex: none;
}
.brand:hover { color: var(--white); }

.brand__mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .06em;
  color: #04121B;
  background: linear-gradient(135deg, var(--cyan) 0%, #8AEEFF 100%);
  clip-path: polygon(0 0, 100% 0, 100% 68%, 68% 100%, 0 100%);
}

.brand__text { display: flex; flex-direction: column; gap: 2px; }

.brand__name {
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: .02em;
}

.brand__tag {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  line-height: 1.3;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--mauve);
}

.header-rail__note {
  margin: 0;
  padding-left: 18px;
  border-left: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--slate);
  white-space: nowrap;
}

.header-rail__actions {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: auto;
}

.status-chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 5px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--slate);
  border: 1px dashed rgba(38, 53, 95, .95);
}

.status-chip__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--acid);
  box-shadow: 0 0 0 0 rgba(182, 255, 59, .55);
  animation: status-pulse 2.6s ease-out infinite;
}

@keyframes status-pulse {
  0%   { box-shadow: 0 0 0 0 rgba(182, 255, 59, .5); }
  70%  { box-shadow: 0 0 0 7px rgba(182, 255, 59, 0); }
  100% { box-shadow: 0 0 0 0 rgba(182, 255, 59, 0); }
}

.header-main {
  background: linear-gradient(180deg, rgba(12, 21, 51, .97), rgba(12, 21, 51, .88));
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

.header-main__inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter);
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.site-nav { min-width: 0; }

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav__item { margin: 0; }

.site-nav__link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 12px 14px 14px;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  line-height: 1.2;
  color: var(--slate);
  text-decoration: none;
  transition: color .2s var(--ease);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 5px;
  height: 2px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .28s var(--ease);
}

.site-nav__link:hover { color: var(--white); }
.site-nav__link:hover::after { transform: scaleX(1); }

.site-nav__link[aria-current="page"] { color: var(--white); }
.site-nav__link[aria-current="page"]::after { transform: scaleX(1); }
.site-nav__link[aria-current="page"] .site-nav__num { color: var(--cyan); }

.site-nav__num {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: .1em;
  color: var(--mauve);
  transition: color .2s var(--ease);
}

.site-nav__label { display: inline-block; }

.header-main__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--mauve);
  white-space: nowrap;
}
.header-main__meta .mono { color: var(--amber); margin-right: 6px; }

.nav-toggle {
  display: none;
  position: relative;
  z-index: 85;
  align-items: center;
  gap: 10px;
  margin-left: auto;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--white);
  background: transparent;
  border: 1px solid var(--line);
  cursor: pointer;
  transition: border-color .2s var(--ease), color .2s var(--ease);
}
.nav-toggle:hover { border-color: var(--cyan); color: var(--cyan); }

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: space-between;
  width: 16px;
  height: 12px;
}
.nav-toggle__bars span {
  display: block;
  height: 2px;
  width: 100%;
  background: currentColor;
  transition: transform .26s var(--ease), opacity .18s 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); }

.nav-scrim {
  position: fixed;
  inset: 0;
  z-index: 70;
  background: rgba(4, 8, 20, .74);
  opacity: 0;
  pointer-events: none;
  transition: opacity .3s var(--ease);
}

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  position: relative;
  margin-top: clamp(32px, 6vw, 80px);
  background: var(--ink-900);
  border-top: 1px solid var(--line);
  color: var(--slate);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: min(420px, 42%);
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), rgba(38, 224, 255, 0));
}

.footer-grid {
  max-width: var(--shell);
  margin: 0 auto;
  padding: clamp(40px, 5vw, 64px) var(--gutter) clamp(28px, 4vw, 44px);
  display: grid;
  grid-template-columns: 1.6fr .8fr .9fr 1.3fr;
  gap: clamp(24px, 3vw, 56px);
  align-items: start;
}

.footer-brand { display: flex; flex-direction: column; gap: 16px; }

.brand--footer { align-self: flex-start; }

.footer-brand__desc {
  margin: 0;
  max-width: 34ch;
  font-size: 14px;
  line-height: 24px;
  color: var(--slate);
}

.footer-brand__legal {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--mauve);
}
.footer-brand__legal .mono { color: var(--amber); margin-right: 6px; }

.footer-col { display: block; }

.footer-col__title {
  margin: 0 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px dashed rgba(38, 53, 95, .9);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--mauve);
}

.footer-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}
.footer-list li { margin: 0; }

.footer-list a {
  display: inline-block;
  font-size: 14px;
  line-height: 22px;
  color: var(--slate);
  text-decoration: none;
  transition: color .2s var(--ease), transform .2s var(--ease);
}
.footer-list a:hover {
  color: var(--cyan);
  transform: translateX(2px);
}

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

.footer-contact__line {
  display: flex;
  gap: 10px;
  margin: 0 0 10px;
  font-size: 14px;
  line-height: 22px;
}

.footer-contact__label {
  flex: none;
  min-width: 34px;
  padding-top: 1px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--mauve);
}

.footer-contact__value {
  color: var(--white);
  word-break: break-word;
}

.footer-contact__note {
  margin: 14px 0 0;
  padding-top: 14px;
  border-top: 1px solid rgba(38, 53, 95, .7);
  font-size: 13px;
  line-height: 22px;
  color: var(--slate);
}

.footer-bottom {
  border-top: 1px solid rgba(38, 53, 95, .7);
  background: rgba(7, 11, 26, .9);
}

.footer-bottom__inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 18px var(--gutter) 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
}

.footer-bottom__copy {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--mauve);
}

.footer-bottom__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--mauve);
}
.footer-bottom__meta .mono { color: var(--amber); }
.footer-bottom__meta a { color: var(--slate); text-decoration: none; }
.footer-bottom__meta a:hover { color: var(--cyan); }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1180px) {
  .header-main__meta { display: none; }
  .header-rail__note { display: none; }
}

@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--editorial { grid-template-columns: minmax(0, 1fr) minmax(0, 3fr); }
  .grid--editorial > .note-col { grid-column: 1 / -1; border-left: 0; border-top: 1px solid var(--line); padding: 14px 0 0; }
}

@media (max-width: 920px) {
  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 80;
    width: min(86vw, 348px);
    padding: 92px 22px 32px;
    background: linear-gradient(200deg, #0C1533 0%, #070B1A 100%);
    border-left: 1px solid var(--line);
    overflow-y: auto;
    transform: translateX(102%);
    transition: transform .32s var(--ease);
  }

  .site-nav[data-open] {
    transform: translateX(0);
    box-shadow: -30px 0 70px -30px rgba(0, 0, 0, .95);
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .site-nav__item { border-bottom: 1px solid rgba(38, 53, 95, .55); }

  .site-nav__link {
    padding: 16px 6px 16px 12px;
    font-size: 17px;
  }

  .site-nav__link::after {
    left: 0;
    right: auto;
    top: 14px;
    bottom: 14px;
    width: 3px;
    height: auto;
    transform: scaleY(0);
    transform-origin: top center;
  }

  .site-nav__link:hover::after,
  .site-nav__link[aria-current="page"]::after { transform: scaleY(1); }

  .site-header[data-open] .nav-scrim {
    opacity: 1;
    pointer-events: auto;
  }

  .header-rail__inner { min-height: 50px; }
  .status-chip { display: none; }
}

@media (max-width: 760px) {
  .grid--editorial,
  .grid--halves { grid-template-columns: minmax(0, 1fr); }
  .grid--editorial > .note-col { grid-column: auto; }
  .section-head { align-items: flex-start; }
}

@media (max-width: 620px) {
  .footer-grid { grid-template-columns: minmax(0, 1fr); gap: 30px; }
  .footer-bottom__inner { flex-direction: column; align-items: flex-start; }
  .header-rail__actions .btn { padding: 8px 12px; font-size: 11px; }
  .brand__tag { letter-spacing: .12em; }
  .media-frame { aspect-ratio: 4 / 3; }
  .media-frame--wide { aspect-ratio: 16 / 9; }
  .media-frame--tall { aspect-ratio: 3 / 4; }
}

/* ============================================================
   可访问性与动效偏好
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

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

  .status-chip__dot { animation: none; box-shadow: none; }
  .js-reveal [data-reveal] { opacity: 1; transform: none; }
  .btn:hover { transform: none; }
  .footer-list a:hover { transform: none; }
}