/* ============================================================
   乐道赛场 · /assets/site.css
   夜间赛场指挥中心：深层玻璃 + 斜切色块 + 赛道网格
   ============================================================ */

/* ---------- 1. reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background:
    radial-gradient(1100px 620px at 84% -12%, rgba(55, 224, 206, 0.10), transparent 62%),
    radial-gradient(900px 520px at 2% 6%, rgba(255, 106, 43, 0.08), transparent 64%),
    #0B211B;
  color: #F3EDE2;
  font-family: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  font-size: 17px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

main { flex: 1 0 auto; display: block; }

img, svg, video { display: block; max-width: 100%; height: auto; }
ul, ol { margin: 0; padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
input { font: inherit; }
table { border-collapse: collapse; width: 100%; }
[hidden] { display: none !important; }

h1, h2, h3, h4 {
  font-family: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: -0.01em;
  margin: 0 0 0.5em;
  color: #F3EDE2;
}
h1 { font-size: clamp(32px, 5vw, 72px); }
h2 { font-size: clamp(26px, 3.4vw, 44px); }
h3 { font-size: clamp(20px, 2.2vw, 28px); }
h4 { font-size: clamp(17px, 1.6vw, 20px); }
p { margin: 0 0 1em; }

/* ---------- 2. tokens ---------- */
:root {
  --ink: #0B211B;
  --moss: #1D4638;
  --stone: #2B3230;
  --orange: #FF6A2B;
  --cyan: #37E0CE;
  --clay: #C2663F;
  --cream: #F3EDE2;
  --lichen: #A9C2B4;
  --amber: #F2B33D;

  --ink-text: #08170F;
  --line-soft: rgba(169, 194, 180, 0.18);
  --line-mid: rgba(169, 194, 180, 0.32);

  --shell: 1200px;
  --gutter: clamp(16px, 4vw, 48px);
  --radius: 2px;

  --font-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
  --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-num: "Barlow Condensed", "Oswald", "Arial Narrow", "Noto Sans SC", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --shadow-panel: 0 18px 40px rgba(0, 0, 0, 0.38);
}

/* ---------- 3. 基础可访问性 ---------- */
:where(a, button, input, summary, [tabindex]):focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  border-radius: var(--radius);
}

.skip-link {
  position: fixed;
  top: -120px;
  left: 16px;
  z-index: 200;
  padding: 12px 20px;
  background: var(--cyan);
  color: var(--ink-text);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  border-radius: var(--radius);
  box-shadow: var(--shadow-panel);
  transition: top 0.18s var(--ease);
}
.skip-link:focus { top: 14px; outline: 2px solid var(--cream); outline-offset: 2px; }

/* ---------- 4. 容器与章节件 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(48px, 7vw, 96px); }
.section--tight { padding-block: clamp(28px, 4vw, 56px); }

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
}
.kicker::before { content: ""; width: 30px; height: 2px; background: var(--cyan); }

.chapter-code {
  font-family: var(--font-num);
  font-size: 14px;
  letter-spacing: 0.18em;
  color: var(--orange);
}

.rule { height: 1px; border: 0; margin: 0; background: var(--line-soft); }

/* ---------- 5. 网格 ---------- */
.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(14px, 2vw, 28px);
}
.span-2 { grid-column: span 2; }
.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-9 { grid-column: span 9; }
.span-12 { grid-column: span 12; }

/* ---------- 6. 通用按钮 / chips ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 22px;
  border: 1px solid var(--line-mid);
  background: transparent;
  color: var(--cream);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.2;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background 0.18s var(--ease), transform 0.18s var(--ease);
}
.btn:hover { border-color: var(--cyan); color: var(--cyan); background: rgba(55, 224, 206, 0.10); }

.btn--solid {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--ink-text);
  padding-right: 30px;
  clip-path: polygon(0 0, 100% 0, calc(100% - 12px) 100%, 0 100%);
}
.btn--solid:hover { background: var(--amber); border-color: var(--amber); color: var(--ink-text); transform: translateX(2px); }

.btn--ghost { background: rgba(29, 70, 56, 0.42); }
.btn--quiet { border-color: transparent; color: var(--cyan); text-decoration: underline; text-underline-offset: 4px; }
.btn--quiet:hover { background: transparent; border-color: transparent; color: var(--amber); }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 13px;
  border: 1px solid var(--line-mid);
  background: rgba(29, 70, 56, 0.36);
  color: var(--lichen);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease), background 0.16s var(--ease);
}
.chip:hover { border-color: var(--cyan); color: var(--cyan); }
.chip[aria-pressed="true"] { background: var(--cyan); border-color: var(--cyan); color: var(--ink-text); }
.chip[aria-pressed="true"]:hover { color: var(--ink-text); }

/* ---------- 7. 面包屑 / 正文 / 面板 / 数据 ---------- */
.crumb {
  padding-block: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--lichen);
}
.crumb__list { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.crumb__link { color: var(--lichen); transition: color 0.16s var(--ease); }
.crumb__link:hover { color: var(--cyan); }
.crumb__sep { color: rgba(169, 194, 180, 0.5); }
.crumb [aria-current="page"] { color: var(--cream); }

.prose { max-width: 38em; font-size: 17px; line-height: 1.75; }
.prose p { margin: 0 0 1.15em; }
.prose a { color: var(--cyan); text-decoration: underline; text-underline-offset: 3px; }
.prose a:hover { color: var(--amber); }
.prose ul, .prose ol { margin: 0 0 1.15em; padding-left: 1.15em; list-style: disc; }
.prose li { margin-bottom: 0.4em; }
.prose strong { color: var(--cream); }
.prose code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  padding: 1px 6px;
  background: rgba(43, 50, 48, 0.9);
  color: var(--amber);
}

.panel {
  padding: clamp(18px, 2.4vw, 28px);
  background: rgba(29, 70, 56, 0.52);
  border: 1px solid var(--line-soft);
}
.panel--solid { background: var(--moss); border-color: rgba(55, 224, 206, 0.22); }
.panel--stone { background: var(--stone); border-color: var(--line-soft); }

.glass {
  background: rgba(11, 33, 27, 0.62);
  border: 1px solid rgba(55, 224, 206, 0.26);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.stat { display: grid; gap: 4px; }
.stat__value {
  font-family: var(--font-num);
  font-weight: 600;
  font-size: clamp(40px, 6vw, 84px);
  line-height: 0.95;
  font-variant-numeric: tabular-nums;
  color: var(--cream);
}
.stat__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--lichen);
}

.data-table { font-size: 14px; }
.data-table caption {
  text-align: left;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--lichen);
  padding-bottom: 10px;
}
.data-table th {
  text-align: left;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--lichen);
  padding: 10px 12px;
  border-bottom: 1px solid var(--line-mid);
  white-space: nowrap;
}
.data-table td {
  padding: 11px 12px;
  border-bottom: 1px solid var(--line-soft);
  color: var(--cream);
  vertical-align: top;
}
.data-table tbody tr:nth-child(even) { background: rgba(43, 50, 48, 0.55); }
.data-table tbody tr:hover { background: rgba(55, 224, 206, 0.08); }
.data-table .is-num { font-family: var(--font-num); font-variant-numeric: tabular-nums; font-size: 18px; }

/* ---------- 8. 图片容器基础规则 ---------- */
.img-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--line-soft);
  background:
    linear-gradient(135deg, rgba(29, 70, 56, 0.95), rgba(11, 33, 27, 0.95));
}
.img-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.82) contrast(1.04);
}
.img-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    repeating-linear-gradient(115deg, rgba(55, 224, 206, 0.07) 0 1px, transparent 1px 34px),
    linear-gradient(180deg, transparent 55%, rgba(11, 33, 27, 0.55));
}
.img-frame--wide { aspect-ratio: 21 / 9; }
.img-frame--tall { aspect-ratio: 3 / 4; }
.img-frame--square { aspect-ratio: 1 / 1; }
.img-frame__cap {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  z-index: 2;
  padding: 8px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--cream);
  background: linear-gradient(0deg, rgba(11, 33, 27, 0.92), transparent);
}

/* ============================================================
   9. 头部
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: linear-gradient(180deg, rgba(11, 33, 27, 0.98), rgba(11, 33, 27, 0.92));
  -webkit-backdrop-filter: blur(12px) saturate(120%);
  backdrop-filter: blur(12px) saturate(120%);
  border-bottom: 1px solid var(--line-soft);
}

.scroll-meter {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: rgba(169, 194, 180, 0.14);
  pointer-events: none;
  z-index: 3;
}
.scroll-meter i {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--orange), var(--amber) 46%, var(--cyan));
  transition: width 0.12s linear;
}

.header-utility {
  background-image: repeating-linear-gradient(112deg, rgba(55, 224, 206, 0.055) 0 1px, transparent 1px 52px);
}
.header-utility__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-block: 14px;
  transition: padding 0.2s var(--ease);
}

/* 品牌 */
.brand { display: inline-flex; align-items: center; gap: 12px; min-width: 0; }
.brand__mark {
  display: grid;
  place-items: center;
  width: 38px; height: 38px;
  flex: 0 0 auto;
  background: var(--orange);
  color: var(--ink-text);
  font-family: var(--font-num);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: 0.04em;
  clip-path: polygon(0 0, 100% 0, calc(100% - 9px) 100%, 0 100%);
  transition: width 0.2s var(--ease), height 0.2s var(--ease), font-size 0.2s var(--ease);
}
.brand__body { display: grid; gap: 1px; min-width: 0; }
.brand__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.1;
  letter-spacing: 0.02em;
  color: var(--cream);
  transition: font-size 0.2s var(--ease);
}
.brand__pulse {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--lichen);
  white-space: nowrap;
}
.pulse-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(55, 224, 206, 0.18);
  animation: ledao-pulse 2.8s ease-in-out infinite;
}
@keyframes ledao-pulse { 50% { opacity: 0.35; } }

.brand--footer .brand__name { font-size: 22px; }
.brand--footer .brand__mark { width: 42px; height: 42px; }

/* 工具区 */
.utility-tools { display: flex; align-items: center; gap: 8px; flex: 0 0 auto; }

.tool-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--line-mid);
  background: rgba(29, 70, 56, 0.42);
  color: var(--cream);
  font-size: 13px;
  line-height: 1.2;
  letter-spacing: 0.02em;
  white-space: nowrap;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background 0.18s var(--ease), transform 0.18s var(--ease);
}
.tool-btn:hover { border-color: var(--cyan); color: var(--cyan); background: rgba(55, 224, 206, 0.12); }

.tool-btn--accent {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--ink-text);
  font-weight: 700;
  padding-right: 22px;
  clip-path: polygon(0 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
}
.tool-btn--accent:hover { background: var(--amber); border-color: var(--amber); color: var(--ink-text); transform: translateX(3px); }

.tool-btn__code { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.08em; color: var(--cyan); }
.tool-btn--accent .tool-btn__code { color: var(--ink-text); }
.tool-btn__glyph { font-size: 15px; line-height: 1; color: var(--cyan); }
.tool-btn__label { display: inline-block; }

.chev {
  width: 6px; height: 6px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg) translateY(-1px);
  transition: transform 0.18s var(--ease);
}
.lang-btn[aria-expanded="true"] .chev { transform: rotate(-135deg) translateY(-1px); }

.lang-switch { position: relative; }
.lang-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  z-index: 90;
  min-width: 208px;
  padding: 6px;
  background: #0F2A22;
  border: 1px solid rgba(55, 224, 206, 0.36);
  box-shadow: var(--shadow-panel);
}
.lang-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  width: 100%;
  padding: 9px 10px;
  font-size: 13px;
  text-align: left;
  color: var(--lichen);
  transition: color 0.16s var(--ease), background 0.16s var(--ease);
}
.lang-option:hover { background: rgba(55, 224, 206, 0.12); color: var(--cream); }
.lang-option[aria-current="true"] { background: rgba(55, 224, 206, 0.10); color: var(--cyan); }
.lang-code { font-family: var(--font-mono); font-size: 11px; color: var(--lichen); letter-spacing: 0.06em; }

/* 移动栏目按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border: 1px solid var(--line-mid);
  background: rgba(29, 70, 56, 0.45);
  color: var(--cream);
  font-size: 13px;
  letter-spacing: 0.04em;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background 0.18s var(--ease);
}
.nav-toggle:hover { border-color: var(--cyan); color: var(--cyan); }
.nav-toggle[aria-expanded="true"] { background: rgba(55, 224, 206, 0.16); border-color: var(--cyan); color: var(--cyan); }
.nav-toggle__bars { display: grid; gap: 3px; width: 16px; }
.nav-toggle__bars i {
  display: block;
  height: 2px;
  background: currentColor;
  transition: transform 0.18s var(--ease), opacity 0.18s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:first-child { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:last-child { transform: translateY(-5px) rotate(-45deg); }
.nav-toggle__text { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.1em; }

/* 站内索引面板 */
.site-index {
  position: absolute;
  left: 0; right: 0;
  top: 100%;
  z-index: 80;
  background: #0E2A22;
  border-bottom: 1px solid rgba(55, 224, 206, 0.36);
  box-shadow: 0 26px 52px rgba(0, 0, 0, 0.55);
}
.site-index__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.9fr);
  gap: clamp(16px, 3vw, 40px);
  align-items: start;
  padding-block: 22px;
}
.site-index__field { display: grid; gap: 8px; align-content: start; }
.site-index__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
}
.site-index__input {
  width: 100%;
  padding: 11px 14px;
  background: rgba(11, 33, 27, 0.92);
  border: 1px solid var(--line-mid);
  color: var(--cream);
  font-size: 14px;
  letter-spacing: 0.02em;
}
.site-index__input::placeholder { color: rgba(169, 194, 180, 0.72); }
.site-index__input:focus { border-color: var(--cyan); outline: 2px solid var(--cyan); outline-offset: 1px; }

.site-index__results { display: grid; gap: 8px; }
.site-index__list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 2px 10px; }
.site-index__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 12px;
  border-left: 2px solid transparent;
  font-size: 14px;
  color: rgba(243, 237, 226, 0.86);
  transition: color 0.16s var(--ease), background 0.16s var(--ease), border-color 0.16s var(--ease);
}
.site-index__link:hover { color: var(--cyan); background: rgba(55, 224, 206, 0.10); border-left-color: var(--cyan); }
.site-index__code { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.06em; color: var(--lichen); }
.site-index__empty {
  margin: 0;
  padding: 10px 12px;
  border-left: 2px solid var(--amber);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--amber);
}

/* 主导航 */
.header-nav {
  border-top: 1px solid var(--line-soft);
  background: linear-gradient(90deg, rgba(29, 70, 56, 0.78), rgba(11, 33, 27, 0.24) 70%);
}
.header-nav__inner {
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  gap: 24px;
}
.primary-nav { min-width: 0; }
.nav-list { display: flex; align-items: stretch; gap: 0; counter-reset: nav; }
.nav-list__link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 14px 15px;
  font-size: 14.5px;
  letter-spacing: 0.01em;
  color: rgba(243, 237, 226, 0.82);
  transition: color 0.18s var(--ease), background 0.18s var(--ease);
}
.nav-list__link::before {
  counter-increment: nav;
  content: counter(nav, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  color: rgba(169, 194, 180, 0.62);
  transition: color 0.18s var(--ease);
}
.nav-list__link::after {
  content: "";
  position: absolute;
  left: 15px; right: 15px; bottom: 7px;
  height: 2px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.22s var(--ease);
}
.nav-list__link:hover { color: var(--cream); background: rgba(55, 224, 206, 0.08); }
.nav-list__link:hover::before { color: var(--cyan); }
.nav-list__link[aria-current="page"] { color: var(--cyan); background: rgba(55, 224, 206, 0.10); }
.nav-list__link[aria-current="page"]::before { color: var(--cyan); }
.nav-list__link[aria-current="page"]::after { transform: scaleX(1); }

.nav-meter {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding-block: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--lichen);
  white-space: nowrap;
}
.nav-meter__dot { width: 6px; height: 6px; background: var(--amber); box-shadow: 0 0 0 3px rgba(242, 179, 61, 0.16); }

/* 头部压缩态 */
.site-header[data-compact="true"] .header-utility__inner { padding-block: 8px; }
.site-header[data-compact="true"] .brand__mark { width: 30px; height: 30px; font-size: 13px; }
.site-header[data-compact="true"] .brand__name { font-size: 17px; }
.site-header[data-compact="true"] .brand__pulse { display: none; }
.site-header[data-compact="true"] .nav-list__link { padding-block: 10px; }
.site-header[data-compact="true"] .nav-meter { padding-block: 10px; }

/* ============================================================
   10. 页脚
   ============================================================ */
.site-footer {
  margin-top: clamp(48px, 7vw, 96px);
  background: var(--stone);
  border-top: 2px solid var(--orange);
  color: var(--cream);
}

.footer-top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px 32px;
  padding-block: clamp(26px, 4vw, 44px);
  border-bottom: 1px solid var(--line-soft);
}
.footer-note {
  margin: 0;
  max-width: 32em;
  font-size: 14px;
  line-height: 1.7;
  color: var(--lichen);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 44px);
  padding-block: clamp(32px, 4.5vw, 56px);
}

.footer-col { min-width: 0; }
.footer-col__title {
  margin: 0 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.footer-list { display: grid; gap: 9px; }
.footer-list a {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 14px;
  color: rgba(243, 237, 226, 0.82);
  transition: color 0.18s var(--ease), transform 0.18s var(--ease);
}
.footer-list a::before {
  content: "";
  width: 5px; height: 5px;
  flex: 0 0 auto;
  background: rgba(169, 194, 180, 0.5);
  transition: background 0.18s var(--ease);
}
.footer-list a:hover { color: var(--cream); transform: translateX(2px); }
.footer-list a:hover::before { background: var(--cyan); }

.footer-fact {
  display: grid;
  gap: 2px;
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--cream);
  overflow-wrap: anywhere;
}
.footer-fact__key {
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--lichen);
}
.footer-hours {
  margin: 0;
  padding-left: 10px;
  border-left: 2px solid var(--clay);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--lichen);
}

.footer-bottom {
  background: rgba(11, 33, 27, 0.55);
  border-top: 1px solid var(--line-soft);
}
.footer-bottom__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  padding-block: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  color: var(--lichen);
}
.footer-copy, .footer-icp { margin: 0; }
.footer-legal { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 18px; }
.footer-legal a { color: var(--lichen); transition: color 0.16s var(--ease); }
.footer-legal a:hover { color: var(--cyan); }

/* ============================================================
   11. 响应式
   ============================================================ */
@media (max-width: 1080px) {
  .nav-meter { display: none; }
  .nav-list__link { padding-inline: 12px; }
  .nav-list__link::after { left: 12px; right: 12px; }
  .site-index__inner { grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr); }
}

@media (max-width: 980px) {
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .site-index__list { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }

  .header-nav { border-top: 0; padding-block: 0; }
  .header-nav__inner { display: block; padding-block: 0; }

  .primary-nav { display: none; width: 100%; }
  .primary-nav[data-open="true"] {
    display: block;
    border-top: 1px solid var(--line-soft);
    animation: ledao-nav-in 0.18s var(--ease);
  }
  .nav-list { flex-direction: column; }
  .nav-list__link {
    padding: 13px 2px;
    font-size: 15px;
    border-bottom: 1px solid rgba(169, 194, 180, 0.12);
  }
  .nav-list__link::after {
    left: 0; right: auto; bottom: 0;
    width: 100%;
  }

  .site-index { position: static; box-shadow: none; border-top: 1px solid var(--line-soft); border-bottom: 1px solid var(--line-soft); }
  .site-index__inner { grid-template-columns: minmax(0, 1fr); padding-block: 18px; }

  .header-utility__inner { padding-block: 10px; gap: 10px; }
  .utility-tools { gap: 6px; }
  .brand__pulse { display: none; }
  .brand__name { font-size: 18px; }

  .site-header[data-compact="true"] .nav-list__link { padding-block: 13px; }
}

@keyframes ledao-nav-in {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 900px) {
  .grid-12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .span-2 { grid-column: span 6; }
  .span-3, .span-4 { grid-column: span 3; }
  .span-5, .span-6, .span-7, .span-8, .span-9 { grid-column: span 6; }
}

@media (max-width: 620px) {
  .tool-btn--accent { display: none; }
  .tool-btn__label { display: none; }
  .tool-btn { padding: 9px 11px; }
  .tool-btn__code { font-size: 11px; }
  .brand__mark { width: 32px; height: 32px; font-size: 14px; }
  .brand__name { font-size: 17px; }
  .nav-toggle__text { display: none; }
  .nav-toggle { padding: 9px 10px; }

  .site-index__list { grid-template-columns: minmax(0, 1fr); }
  .footer-grid { grid-template-columns: minmax(0, 1fr); }
  .footer-bottom__inner { justify-content: flex-start; }
  .prose { font-size: 16px; }

  .grid-12 { grid-template-columns: minmax(0, 1fr); }
  .span-2, .span-3, .span-4, .span-5, .span-6, .span-7, .span-8, .span-9, .span-12 { grid-column: 1 / -1; }
}

/* ---------- 12. 动效降级 ---------- */
@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;
  }
  .pulse-dot { animation: none; }
  .scroll-meter i { transition: none; }
  .btn--solid:hover,
  .tool-btn--accent:hover,
  .footer-list a:hover { transform: none; }
}