/* ============================================================
   UC赛场 · /assets/site.css
   夜间球场指挥台 · 共享外壳样式
   ============================================================ */

/* ---------- 1. 变量 ---------- */
:root {
  --ink: #07130F;
  --deep: #0E2A22;
  --board: #173B30;
  --signal: #C8FF3D;
  --ember: #FF8A3D;
  --fog: #F4F7F2;
  --mist: #A9B8AE;
  --grid: #6F8F7E;
  --violet: #8B7CFF;

  --rail-w: 272px;
  --edge: clamp(18px, 4vw, 54px);
  --radius-lg: 26px;
  --radius-md: 16px;
  --radius-sm: 10px;

  --line: rgba(111, 143, 126, 0.26);
  --line-soft: rgba(111, 143, 126, 0.15);

  --font-display: "Arial Narrow", "Helvetica Neue Condensed", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", system-ui, sans-serif;
  --font-serif: "Songti SC", "Noto Serif CJK SC", "Source Han Serif SC", Georgia, "Times New Roman", serif;
  --font-mono: "SF Mono", "JetBrains Mono", Menlo, Consolas, "Courier New", monospace;

  --shadow-panel: 0 24px 60px -34px rgba(0, 0, 0, 0.9);
  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
}

/* ---------- 2. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body,
h1, h2, h3, h4, p, ul, ol, dl, dd, dt, figure, blockquote { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; }
button { font: inherit; color: inherit; border: 0; background: none; cursor: pointer; }
a { color: inherit; }
table { border-collapse: collapse; width: 100%; }

/* ---------- 3. 基础与中文排版 ---------- */
body {
  min-height: 100vh;
  background-color: var(--ink);
  background-image:
    linear-gradient(rgba(111, 143, 126, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(111, 143, 126, 0.055) 1px, transparent 1px),
    radial-gradient(120% 70% at 88% -12%, rgba(200, 255, 61, 0.10), transparent 62%),
    radial-gradient(90% 60% at -10% 104%, rgba(139, 124, 255, 0.12), transparent 58%);
  background-size: 64px 64px, 64px 64px, 100% 100%, 100% 100%;
  background-repeat: repeat, repeat, no-repeat, no-repeat;
  color: var(--fog);
  font-family: var(--font-body);
  font-size: clamp(1rem, 0.96rem + 0.18vw, 1.0625rem);
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.is-nav-open { overflow: hidden; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.015em;
  color: var(--fog);
  text-wrap: balance;
}
h1 { font-size: clamp(2.1rem, 6vw, 4rem); line-height: 1.02; }
h2 { font-size: clamp(1.55rem, 3.4vw, 2.5rem); }
h3 { font-size: clamp(1.15rem, 2vw, 1.42rem); letter-spacing: 0; }

::selection { background: var(--signal); color: var(--ink); }

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

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

/* ---------- 4. 容器与节奏 ---------- */
.shell {
  width: 100%;
  max-width: 1180px;
  margin-inline: auto;
  padding-inline: var(--edge);
}
.section { padding-block: clamp(42px, 6vw, 86px); }
.section--flush { padding-block: 0; }

.prose { max-width: 68ch; }
.prose p + p { margin-top: 1.1em; }
.prose h2, .prose h3 { margin-top: 2em; margin-bottom: 0.6em; }

/* ---------- 5. 跳过链接 ---------- */
.skip-link {
  position: fixed;
  inset-inline-start: 12px;
  top: -120px;
  z-index: 300;
  padding: 10px 18px;
  border-radius: 8px;
  background: var(--signal);
  color: var(--ink);
  font-weight: 700;
  text-decoration: none;
  transition: top 0.2s var(--ease);
}
.skip-link:focus { top: 12px; }

/* ---------- 6. 页头轨道 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 13px var(--edge);
  background: linear-gradient(104deg, rgba(7, 19, 15, 0.98), rgba(14, 42, 34, 0.97) 62%, rgba(23, 59, 48, 0.95));
  border-bottom: 1px solid var(--line);
}

.scroll-line {
  position: absolute;
  inset-inline: 0;
  bottom: 0;
  height: 2px;
  background: rgba(111, 143, 126, 0.22);
  overflow: hidden;
}
.scroll-fill {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--signal), var(--ember));
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  text-decoration: none;
  color: var(--fog);
}
.brand-mark {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3px;
  width: 34px;
  height: 34px;
  padding: 6px 5px;
  border-radius: 9px;
  background: linear-gradient(150deg, var(--signal), #8ED512);
  box-shadow: 0 8px 20px -8px rgba(200, 255, 61, 0.55);
  flex: none;
}
.brand-mark i {
  display: block;
  border-radius: 1px;
  background: var(--ink);
}
.brand-mark i:nth-child(1) { align-self: end; height: 60%; }
.brand-mark i:nth-child(2) { align-self: end; height: 100%; opacity: 0.55; }
.brand-mark i:nth-child(3) { align-self: end; height: 78%; }

.brand-text { display: flex; flex-direction: column; gap: 1px; }
.brand-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: 0.06em;
  line-height: 1.15;
}
.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.63rem;
  letter-spacing: 0.24em;
  color: var(--grid);
  line-height: 1.3;
}

/* 目录按钮 */
.nav-toggle {
  position: relative;
  z-index: 80;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 15px;
  border-radius: 999px;
  border: 1px solid rgba(200, 255, 61, 0.42);
  background: rgba(200, 255, 61, 0.10);
  color: var(--signal);
  font-size: 0.84rem;
  letter-spacing: 0.14em;
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease);
}
.nav-toggle:hover { background: rgba(200, 255, 61, 0.18); }
.nav-toggle-bars { display: grid; gap: 4px; width: 18px; }
.nav-toggle-bars i {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.24s var(--ease), opacity 0.24s var(--ease);
}
.site-header[data-open] .nav-toggle-bars i:first-child { transform: translateY(3px) rotate(45deg); }
.site-header[data-open] .nav-toggle-bars i:last-child { transform: translateY(-3px) rotate(-45deg); }

/* 遮罩 */
.nav-scrim {
  position: fixed;
  inset: 0;
  z-index: 65;
  background: rgba(3, 9, 7, 0.7);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.22s var(--ease);
}
.site-header[data-open] .nav-scrim { opacity: 1; pointer-events: auto; }

/* 导航抽屉 */
.site-nav {
  position: fixed;
  inset-block: 0;
  inset-inline-end: 0;
  z-index: 70;
  width: min(344px, 88vw);
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 92px 22px 30px;
  overflow-y: auto;
  background: linear-gradient(180deg, #10312a, #06110D 92%);
  border-inline-start: 1px solid var(--line);
  transform: translateX(103%);
  transition: transform 0.3s var(--ease);
}
.site-header[data-open] .site-nav { transform: translateX(0); }

.nav-caption {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--grid);
}

.nav-list { display: grid; gap: 6px; }

.nav-link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 11px 14px 11px 18px;
  border-radius: 12px;
  border: 1px solid transparent;
  color: var(--fog);
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.02rem;
  letter-spacing: 0.03em;
  transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.nav-link::before {
  content: "";
  position: absolute;
  inset-block: 13px;
  inset-inline-start: 5px;
  width: 3px;
  border-radius: 2px;
  background: transparent;
  transition: background 0.2s var(--ease);
}
.nav-index {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--grid);
  transition: color 0.2s var(--ease);
}
.nav-link:hover {
  background: rgba(200, 255, 61, 0.08);
  border-color: rgba(200, 255, 61, 0.3);
  color: var(--signal);
}
.nav-link:hover .nav-index { color: var(--signal); }

.nav-link[aria-current="page"] {
  background: linear-gradient(92deg, rgba(200, 255, 61, 0.18), rgba(200, 255, 61, 0));
  border-color: rgba(200, 255, 61, 0.4);
  color: var(--signal);
  font-weight: 800;
}
.nav-link[aria-current="page"]::before { background: var(--signal); }
.nav-link[aria-current="page"] .nav-index { color: var(--signal); }

/* 状态面板 */
.rail-status {
  border: 1px solid rgba(111, 143, 126, 0.34);
  border-radius: 14px;
  padding: 12px 14px 14px;
  background: linear-gradient(158deg, rgba(23, 59, 48, 0.92), rgba(14, 42, 34, 0.55));
}
.rail-status-label {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--grid);
  margin-bottom: 5px;
}
.rail-status-value {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  color: var(--mist);
  font-variant-numeric: tabular-nums;
}
.rail-progress {
  display: block;
  height: 3px;
  margin-top: 11px;
  border-radius: 2px;
  background: rgba(111, 143, 126, 0.3);
  overflow: hidden;
}
.rail-progress-bar {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--signal), var(--ember));
  transition: width 0.12s linear;
}

.rail-top {
  align-self: flex-start;
  margin-top: 2px;
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}
.rail-top:hover {
  color: var(--signal);
  border-color: rgba(200, 255, 61, 0.5);
  background: rgba(200, 255, 61, 0.08);
}

/* ---------- 7. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 9vw, 124px);
  padding: 0 var(--edge) 34px;
}

.footer-panel {
  position: relative;
  overflow: hidden;
  max-width: 1180px;
  margin-inline: auto;
  display: grid;
  gap: 30px;
  padding: clamp(24px, 4vw, 46px);
  border-radius: var(--radius-lg) var(--radius-lg) 6px 6px;
  border: 1px solid var(--line);
  background:
    linear-gradient(150deg, rgba(200, 255, 61, 0.05), transparent 46%),
    linear-gradient(158deg, var(--board), var(--deep) 58%, #091A14 100%);
  box-shadow: 0 -26px 60px -34px rgba(0, 0, 0, 0.95);
}
.footer-panel::before {
  content: "";
  position: absolute;
  inset-inline-end: -70px;
  top: -100px;
  width: 280px;
  height: 280px;
  background: linear-gradient(140deg, rgba(200, 255, 61, 0.20), rgba(139, 124, 255, 0.10) 58%, transparent);
  clip-path: polygon(50% 0, 100% 38%, 72% 100%, 0 66%);
  pointer-events: none;
}
.footer-panel > * { position: relative; z-index: 1; }

.footer-brand { display: grid; gap: 14px; align-content: start; }
.footer-note {
  font-size: 0.86rem;
  color: var(--mist);
  max-width: 30ch;
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.footer-col-title {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--grid);
  margin-bottom: 10px;
}

.footer-links { display: grid; gap: 8px; }
.footer-links a {
  display: inline-block;
  color: var(--mist);
  font-size: 0.9rem;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.footer-links a:hover {
  color: var(--signal);
  border-bottom-color: rgba(200, 255, 61, 0.55);
}

.footer-meta {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px 12px;
  font-size: 0.84rem;
}
.footer-meta dt {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--grid);
  padding-top: 3px;
}
.footer-meta dd {
  color: var(--mist);
  word-break: break-word;
}
.footer-tip {
  margin-top: 12px;
  font-size: 0.76rem;
  color: var(--grid);
  line-height: 1.6;
}

.footer-base {
  max-width: 1180px;
  margin: 16px auto 0;
  padding-top: 16px;
  border-top: 1px dashed rgba(111, 143, 126, 0.32);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 22px;
}
.footer-legal {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.03em;
  color: var(--grid);
  line-height: 1.9;
}
.footer-legal a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid rgba(111, 143, 126, 0.5);
}
.footer-legal a:hover {
  color: var(--signal);
  border-bottom-color: var(--signal);
}

.to-top {
  padding: 9px 18px;
  border-radius: 999px;
  border: 1px solid rgba(200, 255, 61, 0.35);
  color: var(--signal);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  background: rgba(200, 255, 61, 0.07);
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease);
}
.to-top:hover { background: rgba(200, 255, 61, 0.16); border-color: var(--signal); }

/* ---------- 8. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 24px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  text-decoration: none;
  transition: transform 0.2s var(--ease), background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.btn:hover { transform: translateY(-2px); }
.btn--signal {
  background: var(--signal);
  color: var(--ink);
  box-shadow: 0 14px 30px -14px rgba(200, 255, 61, 0.6);
}
.btn--signal:hover { background: #D8FF6A; }
.btn--line {
  border-color: rgba(244, 247, 242, 0.32);
  color: var(--fog);
  background: rgba(244, 247, 242, 0.04);
}
.btn--line:hover { border-color: var(--signal); color: var(--signal); }
.btn--ember {
  border-color: rgba(255, 138, 61, 0.45);
  color: var(--ember);
  background: rgba(255, 138, 61, 0.08);
}
.btn--ember:hover { background: rgba(255, 138, 61, 0.18); border-color: var(--ember); }
.btn--sm { padding: 9px 16px; font-size: 0.82rem; }

/* ---------- 9. 章节头 ---------- */
.chapter {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 14px 20px;
  margin-bottom: clamp(20px, 3vw, 34px);
}
.chapter-index {
  font-family: var(--font-serif);
  font-size: clamp(2.4rem, 6vw, 4.4rem);
  line-height: 0.8;
  color: rgba(200, 255, 61, 0.2);
  -webkit-text-stroke: 1px rgba(200, 255, 61, 0.6);
  letter-spacing: -0.02em;
}
.chapter-body { display: flex; flex-direction: column; gap: 6px; padding-bottom: 5px; }
.chapter-kicker {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--grid);
}
.chapter-kicker::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--signal);
  flex: none;
}
.chapter-title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3.4vw, 2.4rem);
  letter-spacing: -0.01em;
}

/* ---------- 10. 面板与栅格 ---------- */
.panel {
  position: relative;
  padding: clamp(20px, 3vw, 36px);
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background:
    linear-gradient(122deg, rgba(200, 255, 61, 0.055), transparent 42%),
    var(--deep);
  box-shadow: var(--shadow-panel);
}
.panel--board {
  background:
    linear-gradient(122deg, rgba(200, 255, 61, 0.075), transparent 44%),
    linear-gradient(158deg, var(--board), var(--deep) 84%);
}
.panel--ink {
  background:
    linear-gradient(122deg, rgba(139, 124, 255, 0.08), transparent 46%),
    linear-gradient(168deg, #0B211A, #07130F 82%);
}
.panel--offset { margin-inline-start: clamp(0px, 5vw, 72px); }

.stack { display: grid; gap: clamp(16px, 2.6vw, 28px); }
.stack--overlap > * + * { margin-top: calc(-1 * clamp(10px, 1.6vw, 22px)); }

.grid { display: grid; gap: clamp(16px, 2.4vw, 26px); }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 264px), 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 210px), 1fr)); }

.split { display: grid; gap: clamp(20px, 3vw, 34px); }

/* ---------- 11. 图片容器 ---------- */
.figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background:
    linear-gradient(148deg, rgba(23, 59, 48, 0.95), rgba(7, 19, 15, 0.98));
}
.figure__media {
  display: block;
  width: 100%;
  height: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  background: linear-gradient(148deg, #14342B, #08170F);
  transition: transform 0.6s var(--ease);
}
.figure:hover .figure__media { transform: scale(1.02); }
.figure--wide .figure__media { aspect-ratio: 21 / 9; }
.figure--tall .figure__media { aspect-ratio: 3 / 4; }
.figure--square .figure__media { aspect-ratio: 1 / 1; }
.figure__caption {
  position: absolute;
  inset-inline: 0;
  bottom: 0;
  padding: 14px 16px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--mist);
  background: linear-gradient(0deg, rgba(7, 19, 15, 0.92), transparent);
}

/* ---------- 12. 数字、标签 ---------- */
.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}
.scoreboard {
  font-family: var(--font-display);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  font-size: clamp(2.4rem, 7vw, 4.6rem);
  line-height: 0.94;
  letter-spacing: -0.03em;
  color: var(--signal);
}
.scoreboard--ember { color: var(--ember); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px;
  border-radius: 999px;
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  color: var(--mist);
  background: rgba(111, 143, 126, 0.1);
}
.tag--signal { color: var(--signal); border-color: rgba(200, 255, 61, 0.42); background: rgba(200, 255, 61, 0.1); }
.tag--ember { color: var(--ember); border-color: rgba(255, 138, 61, 0.42); background: rgba(255, 138, 61, 0.1); }
.tag--violet { color: var(--violet); border-color: rgba(139, 124, 255, 0.45); background: rgba(139, 124, 255, 0.12); }

/* ---------- 13. 面包屑与表格 ---------- */
.crumbs {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--grid);
}
.crumbs ol { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.crumbs li { display: flex; align-items: center; gap: 8px; }
.crumbs li + li::before { content: "/"; color: rgba(111, 143, 126, 0.7); }
.crumbs a { color: var(--mist); text-decoration: none; }
.crumbs a:hover { color: var(--signal); }
.crumbs [aria-current="page"] { color: var(--fog); }

.table-scroll { overflow-x: auto; border-radius: var(--radius-md); }

.data-table {
  width: 100%;
  min-width: 520px;
  font-size: 0.9rem;
}
.data-table caption {
  text-align: start;
  padding-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--grid);
}
.data-table th {
  text-align: start;
  padding: 10px 12px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--grid);
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}
.data-table td {
  padding: 12px;
  border-bottom: 1px solid var(--line-soft);
  color: var(--mist);
}
.data-table td.num, .data-table th.num { text-align: end; }
.data-table tbody tr:hover { background: rgba(200, 255, 61, 0.055); }

/* ---------- 14. 显现 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
[data-reveal].is-in { opacity: 1; transform: none; }

/* ---------- 15. 平板 ---------- */
@media (min-width: 700px) {
  .footer-panel { grid-template-columns: 1.1fr 1fr; }
  .footer-contact { grid-column: 1 / -1; }
}

@media (min-width: 900px) {
  .split { grid-template-columns: 7fr 5fr; align-items: start; }
  .split--rev { grid-template-columns: 5fr 7fr; }
  .footer-panel { grid-template-columns: 1.15fr 1.25fr 1fr; }
  .footer-contact { grid-column: auto; }
}

/* ---------- 16. 桌面：左侧轨道 ---------- */
@media (min-width: 1024px) {
  body { padding-inline-start: var(--rail-w); }

  .site-header {
    position: fixed;
    inset-block: 0;
    inset-inline-start: 0;
    inset-inline-end: auto;
    width: var(--rail-w);
    z-index: 80;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 26px;
    padding: 30px 22px 26px;
    overflow-y: auto;
    background:
      linear-gradient(180deg, rgba(23, 59, 48, 0.96), rgba(9, 22, 17, 0.99) 46%, #06110D 100%);
    border-bottom: 0;
    border-inline-end: 1px solid var(--line);
  }
  .site-header::before {
    content: "";
    position: absolute;
    inset-inline-end: 0;
    top: 0;
    width: 2px;
    height: 34%;
    background: linear-gradient(180deg, var(--signal), transparent);
    opacity: 0.75;
  }

  .scroll-line { display: none; }
  .nav-toggle { display: none; }
  .nav-scrim { display: none; }

  .site-nav {
    position: static;
    inset: auto;
    transform: none;
    width: auto;
    padding: 0;
    margin: 0;
    overflow: visible;
    background: none;
    border: 0;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 18px;
  }
  .site-header[data-open] .site-nav { transform: none; }

  .rail-status { margin-top: auto; }
  .footer-base { padding-inline: 4px; }
}

/* ---------- 17. 减少动效 ---------- */
@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;
  }
  [data-reveal] { opacity: 1; transform: none; }
  .figure:hover .figure__media { transform: none; }
  .btn:hover { transform: none; }
}