/* =========================================================
   M8体育手机版 · 共享样式表 /assets/site.css
   夜场战术板：深墨绿底 · 荧光青 / 暖橙双强调
   ========================================================= */

/* ---------- 0. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body, h1, h2, h3, h4, h5, h6, p, ul, ol, li, figure, figcaption, blockquote, dl, dd, table, th, td { margin: 0; padding: 0; }
ul, ol { list-style: none; }
img, svg, video { display: block; max-width: 100%; height: auto; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; width: 100%; }
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 2px; }
::selection { background: var(--cyan); color: var(--ink); }

/* ---------- 1. 设计令牌 ---------- */
:root {
  --ink: #07231D;
  --panel: #0E362C;
  --raise: #145243;
  --mid: #2A6B57;
  --cyan: #6FF2CE;
  --orange: #FF8B3D;
  --orange-soft: #FFD3A0;
  --cream: #F1EEE3;
  --gray-green: #A6BCB2;
  --deep: #04150F;

  --line: rgba(166, 188, 178, 0.22);
  --line-strong: rgba(111, 242, 206, 0.42);
  --shadow-soft: 0 1px 0 rgba(4, 21, 15, 0.55), 0 18px 40px -28px rgba(4, 21, 15, 0.95);

  --rail-w: 88px;
  --bar-h: 62px;
  --shell: 1180px;
  --radius: 3px;

  --font-display: "Arial Narrow", "Helvetica Neue Condensed", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, "DejaVu Sans Mono", monospace;

  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
  --progress: 0;
}

/* ---------- 2. 基础与中文排版 ---------- */
body {
  min-height: 100vh;
  padding-bottom: var(--bar-h);
  background-color: var(--ink);
  background-image:
    radial-gradient(900px 520px at 94% -10%, rgba(111, 242, 206, 0.10), transparent 62%),
    radial-gradient(760px 440px at -12% 6%, rgba(255, 139, 61, 0.07), transparent 60%);
  background-repeat: no-repeat;
  background-attachment: fixed;
  color: var(--cream);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.85;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-wrap: pretty;
}
@media (min-width: 1024px) {
  body { padding-bottom: 0; padding-left: var(--rail-w); }
}
body[data-nav-open] { overflow: hidden; }

h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 800; line-height: 1.16; letter-spacing: 0.01em; color: var(--cream); }
.display-1 { font-size: clamp(2.4rem, 6vw, 5rem); line-height: 1.02; font-weight: 900; letter-spacing: 0.004em; }
.display-2 { font-size: clamp(1.7rem, 3.4vw, 2.6rem); line-height: 1.12; }
.display-3 { font-size: clamp(1.2rem, 2vw, 1.55rem); line-height: 1.25; }

.lede { font-size: clamp(1.04rem, 1.6vw, 1.24rem); line-height: 1.85; color: var(--cream); max-width: 56ch; }
.note { font-size: 13px; line-height: 1.8; color: var(--gray-green); max-width: 62ch; }
.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; letter-spacing: -0.02em; }
.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; }

/* ---------- 3. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  left: 50%;
  top: -72px;
  transform: translateX(-50%);
  z-index: 200;
  padding: 10px 20px;
  border-radius: var(--radius);
  background: var(--cyan);
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  transition: top 0.22s var(--ease);
}
.skip-link:focus { top: 10px; }

/* ---------- 4. 页头：桌面纵向索引栏 / 移动底部横条 ---------- */
.site-header {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 80;
  background: var(--panel);
  border-top: 1px solid var(--line);
  box-shadow: 0 -18px 34px -28px var(--deep);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}
.site-header__inner {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: var(--bar-h);
  padding: 6px 16px;
}

.brand { display: flex; align-items: center; gap: 10px; min-width: 0; }
.brand__mark {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--cyan);
  padding: 6px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
}
.brand__text { display: flex; flex-direction: column; min-width: 0; }
.brand__name { font-family: var(--font-display); font-weight: 800; font-size: 15px; line-height: 1.3; letter-spacing: 0.06em; white-space: nowrap; }
.brand__tag { display: none; font-size: 11px; line-height: 1.4; letter-spacing: 0.05em; color: var(--gray-green); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
@media (min-width: 600px) and (max-width: 1023px) {
  .brand__tag { display: block; max-width: 34ch; }
}

.site-header__status { display: none; }
.status-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 8px rgba(111, 242, 206, 0.9); flex: 0 0 auto; }

/* 目录按钮 */
.nav-toggle {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 13px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--cream);
  font-size: 13px;
  letter-spacing: 0.1em;
  transition: color 0.2s, border-color 0.2s, background-color 0.2s;
}
.nav-toggle:hover { border-color: var(--line-strong); color: var(--cyan); }
.nav-toggle[aria-expanded="true"] { color: var(--cyan); border-color: var(--cyan); background: rgba(20, 82, 67, 0.5); }
.nav-toggle__bars { position: relative; display: block; width: 16px; height: 2px; background: var(--cyan); transition: background-color 0.2s; }
.nav-toggle__bars::before,
.nav-toggle__bars::after { content: ""; position: absolute; left: 0; width: 16px; height: 2px; background: var(--cyan); transition: transform 0.24s var(--ease), top 0.24s var(--ease); }
.nav-toggle__bars::before { top: -5px; }
.nav-toggle__bars::after { top: 5px; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { top: 0; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { top: 0; transform: rotate(-45deg); }
.nav-toggle__text { display: inline-block; }

/* 导航：移动端从上滑出的目录面板 */
.site-nav {
  position: fixed;
  left: 0;
  right: 0;
  bottom: calc(var(--bar-h) + env(safe-area-inset-bottom, 0px));
  z-index: 79;
  max-height: calc(100vh - var(--bar-h) - 24px);
  overflow-y: auto;
  padding: 12px 14px 20px;
  background: var(--panel);
  border-top: 1px solid var(--line-strong);
  box-shadow: 0 -20px 40px -30px var(--deep);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(10px);
  transition: opacity 0.26s var(--ease), transform 0.26s var(--ease), visibility 0.26s linear;
}
.site-nav[data-open] { opacity: 1; visibility: visible; pointer-events: auto; transform: none; }

.site-nav__list { display: grid; grid-template-columns: 1fr; border-top: 1px solid var(--line); }
.site-nav__item { border-bottom: 1px solid var(--line); }
.site-nav__link {
  display: block;
  padding: 13px 10px;
  font-size: 15px;
  letter-spacing: 0.05em;
  color: var(--cream);
  transition: color 0.2s, background-color 0.2s;
}
.site-nav__link:hover,
.site-nav__link:focus-visible { color: var(--cyan); background: rgba(20, 82, 67, 0.5); }
.site-nav__link[aria-current="page"] { color: var(--ink); background: var(--cyan); font-weight: 700; }

.site-nav__cta {
  display: block;
  margin-top: 16px;
  padding: 11px 12px;
  text-align: center;
  border: 1px solid var(--cyan);
  border-radius: var(--radius);
  color: var(--cyan);
  font-size: 13px;
  letter-spacing: 0.1em;
  transition: background-color 0.2s, color 0.2s;
}
.site-nav__cta:hover { background: var(--cyan); color: var(--ink); }

/* 滚动进度：移动端在底条顶缘，桌面在索引栏右缘 */
.rail-meter {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--orange));
  transform-origin: 0 50%;
  transform: scaleX(var(--progress, 0));
  pointer-events: none;
}

/* 桌面：固定 88px 纵向索引栏 */
@media (min-width: 1024px) {
  .site-header {
    top: 0;
    bottom: 0;
    right: auto;
    width: var(--rail-w);
    border-top: 0;
    border-right: 1px solid var(--line);
    box-shadow: 16px 0 34px -32px var(--deep);
    background: linear-gradient(180deg, var(--panel), var(--ink) 80%);
    padding-bottom: 0;
  }
  .site-header__inner {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    height: 100%;
    min-height: 0;
    padding: 20px 11px 18px;
    overflow-y: auto;
    overflow-x: hidden;
    scrollbar-width: none;
  }
  .site-header__inner::-webkit-scrollbar { width: 0; }

  .brand { flex-direction: column; align-items: center; gap: 12px; padding: 4px 0 18px; border-bottom: 1px solid var(--line); }
  .brand__mark { font-size: 17px; padding: 5px; }
  .brand__text { align-items: center; }
  .brand__name { writing-mode: vertical-rl; text-orientation: upright; white-space: normal; font-size: 13.5px; line-height: 1; letter-spacing: 0.22em; }
  .brand__tag { display: none; }

  .site-header__status {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    margin-top: 14px;
    font-family: var(--font-mono);
    font-size: 10.5px;
    line-height: 1.5;
    letter-spacing: 0.08em;
    color: var(--gray-green);
    text-align: center;
  }

  .site-nav {
    position: static;
    flex: 1 1 auto;
    display: flex;
    flex-direction: column;
    margin-top: 16px;
    padding: 0;
    max-height: none;
    overflow: visible;
    background: transparent;
    border-top: 0;
    box-shadow: none;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: none;
    transition: none;
  }
  .site-nav__list { gap: 4px; border-top: 0; }
  .site-nav__item { border-bottom: 0; }
  .site-nav__link {
    padding: 9px 4px;
    font-size: 12px;
    line-height: 1.45;
    letter-spacing: 0.06em;
    text-align: center;
    color: var(--gray-green);
    border-left: 2px solid transparent;
    border-radius: 2px;
  }
  .site-nav__link:hover,
  .site-nav__link:focus-visible { color: var(--cyan); background: var(--raise); }
  .site-nav__link[aria-current="page"] { background: transparent; color: var(--cyan); border-left-color: var(--cyan); font-weight: 700; }
  .site-nav__cta { margin-top: auto; padding: 9px 4px; font-size: 11.5px; line-height: 1.5; letter-spacing: 0.06em; }

  .nav-toggle { display: none; }

  .rail-meter {
    left: auto;
    right: -1px;
    top: 0;
    width: 2px;
    height: 100%;
    background: linear-gradient(180deg, var(--cyan), var(--orange));
    transform-origin: 50% 0;
    transform: scaleY(var(--progress, 0));
  }
}

/* ---------- 5. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(64px, 9vw, 120px);
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(14, 54, 44, 0.35), rgba(4, 21, 15, 0.9)), var(--ink);
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan), rgba(111, 242, 206, 0) 44%, rgba(255, 139, 61, 0.85));
  opacity: 0.75;
}
.footer-frame {
  max-width: var(--shell);
  margin: 0 auto;
  padding: clamp(40px, 6vw, 76px) 22px 28px;
  display: grid;
  gap: 38px;
}
@media (min-width: 900px) {
  .footer-frame { grid-template-columns: 5fr 7fr; gap: 60px; padding: 80px 40px 40px; }
}
.footer-brand { display: inline-flex; align-items: center; gap: 10px; margin-bottom: 18px; }
.footer-brand__mark {
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--cyan);
  padding: 6px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
}
.footer-brand__name { font-family: var(--font-display); font-weight: 800; font-size: 17px; letter-spacing: 0.06em; }
.footer-summary { max-width: 44ch; margin-bottom: 22px; font-size: 15px; line-height: 1.9; color: var(--gray-green); }

.footer-cols { display: grid; gap: 30px; }
@media (min-width: 560px) { .footer-cols { grid-template-columns: repeat(3, 1fr); gap: 32px; } }
.footer-col__title {
  margin-bottom: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--cyan);
}
.footer-links { display: grid; gap: 10px; }
.footer-links a { font-size: 14px; line-height: 1.7; color: var(--cream); transition: color 0.2s; }
.footer-links a:hover,
.footer-links a:focus-visible { color: var(--orange-soft); }
.footer-links--contact a { font-size: 13px; color: var(--gray-green); word-break: break-word; }

.footer-base {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 22px 22px 30px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 22px;
  font-size: 12.5px;
  color: var(--gray-green);
}
@media (min-width: 900px) { .footer-base { padding: 24px 40px 44px; } }
.footer-legal { display: flex; flex-wrap: wrap; gap: 18px; }
.footer-legal a { letter-spacing: 0.06em; transition: color 0.2s; }
.footer-legal a:hover { color: var(--cyan); }
.footer-copy { flex: 1 1 280px; min-width: 0; line-height: 1.6; }

.to-top {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--gray-green);
  font-size: 13px;
  letter-spacing: 0.08em;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.24s var(--ease), visibility 0.24s linear, color 0.2s, border-color 0.2s;
}
.to-top[data-visible] { opacity: 1; visibility: visible; }
.to-top:hover { color: var(--cyan); border-color: var(--cyan); }

/* ---------- 6. 版式容器与网格 ---------- */
.shell { width: 100%; max-width: var(--shell); margin: 0 auto; padding: 0 22px; }
@media (min-width: 900px) { .shell { padding: 0 40px; } }

.section { padding: clamp(56px, 8vw, 104px) 0; }
.section--tight { padding: clamp(36px, 5vw, 64px) 0; }
.section--panel { background: var(--panel); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section__head { display: flex; flex-direction: column; gap: 12px; margin-bottom: 34px; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}
.eyebrow::before { content: ""; width: 26px; height: 1px; background: var(--cyan); }

.grid-12 { display: grid; grid-template-columns: 1fr; gap: 22px; }
@media (min-width: 768px) {
  .grid-12 { grid-template-columns: repeat(12, 1fr); gap: 24px; }
  .span-3 { grid-column: span 3; }
  .span-4 { grid-column: span 4; }
  .span-5 { grid-column: span 5; }
  .span-6 { grid-column: span 6; }
  .span-7 { grid-column: span 7; }
  .span-8 { grid-column: span 8; }
  .span-12 { grid-column: span 12; }
}
.stack > * + * { margin-top: var(--gap, 20px); }
.divider { height: 1px; border: 0; background: var(--line); margin: 0; }

/* ---------- 7. 共享组件 ---------- */
/* 正文 */
.prose { max-width: 68ch; }
.prose p { margin: 0 0 1.15em; }
.prose p:last-child { margin-bottom: 0; }
.prose h2 { font-size: clamp(1.4rem, 2.6vw, 1.9rem); margin: 2em 0 0.6em; }
.prose h3 { font-size: 1.12rem; margin: 1.6em 0 0.5em; color: var(--cyan); }
.prose ul { margin: 0 0 1.2em; }
.prose ul li { position: relative; padding-left: 20px; margin-bottom: 0.5em; }
.prose ul li::before { content: ""; position: absolute; left: 0; top: 0.74em; width: 10px; height: 1px; background: var(--cyan); }
.prose strong { font-weight: 700; color: var(--cream); }
.prose a { color: var(--cyan); border-bottom: 1px solid var(--line-strong); }

/* 面包屑 */
.breadcrumbs { font-size: 12.5px; letter-spacing: 0.08em; color: var(--gray-green); }
.breadcrumbs__list { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.breadcrumbs__list li { display: inline-flex; align-items: center; gap: 8px; }
.breadcrumbs__list li + li::before { content: "/"; color: var(--mid); }
.breadcrumbs a { transition: color 0.2s; }
.breadcrumbs a:hover { color: var(--cyan); }
.breadcrumbs [aria-current="page"] { color: var(--cream); }

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-size: 14px;
  letter-spacing: 0.08em;
  transition: background-color 0.2s, color 0.2s, border-color 0.2s;
}
.btn--primary { background: var(--cyan); color: var(--ink); font-weight: 700; }
.btn--primary:hover { background: var(--orange); color: var(--ink); }
.btn--ghost { border-color: var(--line); color: var(--cream); }
.btn--ghost:hover { border-color: var(--cyan); color: var(--cyan); }

/* 横向主题带与标签 */
.band {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 18px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.band__label { font-family: var(--font-mono); font-size: 11.5px; letter-spacing: 0.18em; color: var(--gray-green); }
.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(20, 82, 67, 0.35);
  color: var(--gray-green);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  transition: color 0.2s, border-color 0.2s, background-color 0.2s;
}
.chip:hover,
.chip[aria-pressed="true"] { color: var(--cyan); border-color: var(--line-strong); background: rgba(20, 82, 67, 0.7); }

/* 卡片 */
.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow-soft);
}
.card--raise { background: var(--raise); }

/* 数据 */
.stat { display: flex; flex-direction: column; gap: 6px; }
.stat__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(2.1rem, 5.2vw, 3.8rem);
  line-height: 1.02;
  letter-spacing: -0.03em;
  color: var(--cream);
  font-variant-numeric: tabular-nums;
}
.stat__num--cyan { color: var(--cyan); }
.stat__num--orange { color: var(--orange); }
.stat__label { font-size: 12.5px; letter-spacing: 0.12em; color: var(--gray-green); }

/* 差异标记：青=一致，橙=待复核 */
.diff { display: inline-flex; align-items: center; gap: 8px; font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.06em; }
.diff::before { content: ""; width: 7px; height: 7px; background: currentColor; flex: 0 0 auto; }
.diff--match { color: var(--cyan); }
.diff--note { color: var(--orange); }
.diff--note::before { transform: rotate(45deg); }

/* 表格 */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow-soft);
}
.data-table { min-width: 560px; font-size: 14.5px; }
.data-table th {
  position: sticky;
  top: 0;
  z-index: 1;
  padding: 12px 14px;
  background: var(--raise);
  border-bottom: 1px solid var(--line);
  color: var(--gray-green);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-align: left;
}
.data-table td { padding: 12px 14px; border-bottom: 1px solid var(--line); }
.data-table tbody tr:nth-child(even) { background: rgba(20, 82, 67, 0.32); }
.data-table tbody tr:last-child td { border-bottom: 0; }
.data-table .num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; letter-spacing: -0.02em; text-align: right; }

/* 标签页 */
.tabs { display: flex; gap: 2px; border-bottom: 1px solid var(--line); overflow-x: auto; }
.tab {
  padding: 12px 16px;
  border-bottom: 2px solid transparent;
  color: var(--gray-green);
  font-size: 14px;
  letter-spacing: 0.06em;
  white-space: nowrap;
  transition: color 0.2s, border-color 0.2s;
}
.tab:hover { color: var(--cream); }
.tab[aria-selected="true"] { color: var(--cyan); border-bottom-color: var(--cyan); }
.tab-panel { padding-top: 22px; animation: fade-in 0.26s var(--ease) both; }
.tab-panel[hidden] { display: none; }

/* 折叠面板 */
.accordion { border-top: 1px solid var(--line); }
.accordion__item { border-bottom: 1px solid var(--line); }
.accordion__trigger {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 4px;
  text-align: left;
  font-size: 15.5px;
  color: var(--cream);
  transition: color 0.2s;
}
.accordion__trigger:hover { color: var(--cyan); }
.accordion__trigger::after {
  content: "";
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  border-right: 1px solid currentColor;
  border-bottom: 1px solid currentColor;
  transform: rotate(45deg);
  transition: transform 0.24s var(--ease);
}
.accordion__trigger[aria-expanded="true"] { color: var(--cyan); }
.accordion__trigger[aria-expanded="true"]::after { transform: rotate(-135deg); }
.accordion__panel { padding: 0 4px 20px; }
.accordion__panel[hidden] { display: none; }

/* 纵向时间轴 */
.timeline { position: relative; display: grid; gap: 26px; padding-left: 24px; }
.timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan), var(--mid));
}
.timeline__item { position: relative; }
.timeline__item::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 8px;
  width: 12px;
  height: 12px;
  border: 1px solid var(--cyan);
  border-radius: 50%;
  background: var(--ink);
}
.timeline__date { display: block; margin-bottom: 4px; font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.08em; color: var(--gray-green); }

/* 图像容器（供页面阶段放置图片） */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(150deg, var(--raise), var(--ink) 72%);
  box-shadow: var(--shadow-soft);
}
.media img,
.media video { width: 100%; height: 100%; object-fit: cover; }
.media--wide { aspect-ratio: 21 / 9; }
.media--tall { aspect-ratio: 3 / 4; }
.media--square { aspect-ratio: 1 / 1; }
.media--tactical::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.55;
  background-image:
    linear-gradient(rgba(111, 242, 206, 0.13) 1px, transparent 1px),
    linear-gradient(90deg, rgba(111, 242, 206, 0.13) 1px, transparent 1px);
  background-size: 48px 48px;
}
.media__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 12px 14px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--cream);
  background: linear-gradient(180deg, rgba(4, 21, 15, 0), rgba(4, 21, 15, 0.92));
}

/* ---------- 8. 动效与可访问性 ---------- */
@keyframes fade-in { from { opacity: 0; } to { opacity: 1; } }
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.45; transform: scale(0.82); }
}
.js-ready [data-reveal] { opacity: 0; transform: translateY(8px); }
.js-ready [data-reveal].is-in { opacity: 1; transform: none; transition: opacity 0.32s var(--ease), transform 0.32s var(--ease); }

@media (min-width: 1024px) {
  .status-dot { animation: pulse 2.6s ease-in-out infinite; }
}

@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-ready [data-reveal] { opacity: 1 !important; transform: none !important; }
  .tabs .tab-panel { animation: none; }
}