/* ==========================================================================
   爱博国娱乐 · 中文站   /assets/site.css
   共享层：重置 / 变量 / 中文排版 / 页头 / 页脚 / 通用组件
   基调：深墨蓝夜航底 · 暖纸实色层 · 琥珀数据光
   ========================================================================== */

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

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

body {
  margin: 0;
  background-color: var(--ink-900);
  color: var(--dark-text);
  font-family: var(--font-sans);
  font-size: clamp(16px, 1.05vw, 17px);
  line-height: 1.75;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* 夜间网格底纹 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(122, 138, 160, .055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(122, 138, 160, .055) 1px, transparent 1px);
  background-size: 84px 84px, 84px 84px;
  -webkit-mask-image: radial-gradient(120% 82% at 50% 0%, #000 28%, transparent 78%);
  mask-image: radial-gradient(120% 82% at 50% 0%, #000 28%, transparent 78%);
}

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 .6em;
  font-weight: 700;
  line-height: 1.24;
  letter-spacing: -.02em;
}

p { margin: 0 0 1.2em; }

ul, ol { margin: 0 0 1.2em; padding-left: 1.25em; }

img, svg, video { max-width: 100%; height: auto; display: block; }

a { color: inherit; text-decoration: none; }

button { font: inherit; }

hr { border: 0; }

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

/* ---------- 2. 变量 ---------- */
:root {
  /* 色板 */
  --ink-900: #0A1622;
  --ink-800: #14263A;
  --ink-700: #1B3049;
  --glass: #7A8AA0;
  --paper: #F3EADA;
  --paper-2: #DCCFB8;
  --gold: #D8A445;
  --amber: #F2C96B;
  --cinnabar: #C1442E;
  --jade: #3F8C77;
  --ink-text: #1B1410;
  --ink-muted: #5A4F45;

  --dark-text: #E8E2D6;
  --dark-muted: #93A3B7;

  /* 玻璃与描边 */
  --glass-line: rgba(122, 138, 160, .28);
  --glass-line-strong: rgba(122, 138, 160, .48);
  --glass-fill: rgba(122, 138, 160, .12);
  --paper-line: rgba(27, 20, 16, .16);

  /* 尺寸 */
  --shell: 1240px;
  --gutter: clamp(18px, 4.5vw, 46px);
  --radius-sm: 12px;
  --radius-card: 18px;
  --radius-panel: 22px;

  /* 字体 */
  --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", "JetBrains Mono", Menlo, Consolas, "Noto Sans Mono", monospace;

  /* 动效 */
  --ease-out: cubic-bezier(.22, .61, .36, 1);
  --dur-expand: 220ms;
  --dur-collapse: 180ms;
}

/* ---------- 3. 排版 ---------- */
.display-1 {
  font-size: clamp(2.1rem, 5.4vw, 4rem);
  font-weight: 800;
  letter-spacing: -.035em;
  line-height: 1.04;
  color: var(--paper);
  margin: 0 0 .5em;
}

.display-2 {
  font-size: clamp(1.5rem, 3vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -.025em;
  line-height: 1.14;
  color: var(--paper);
  margin: 0 0 .5em;
}

.mono {
  font-family: var(--font-mono);
  letter-spacing: .06em;
  font-variant-numeric: tabular-nums;
}

.index-label {
  display: inline-flex;
  align-items: center;
  gap: .6em;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--gold);
  margin: 0 0 .9em;
}

.index-label::before {
  content: "";
  width: 26px;
  height: 1px;
  background: currentColor;
  opacity: .7;
}

.prose {
  max-width: 68ch;
  color: var(--dark-text);
}

.prose h2 {
  margin-top: 2em;
  font-size: clamp(1.25rem, 2vw, 1.62rem);
  color: var(--paper);
}

.prose h3 {
  margin-top: 1.6em;
  font-size: 1.06rem;
  color: var(--paper);
}

.prose strong { color: var(--amber); font-weight: 600; }

.prose li { margin-bottom: .45em; }

.prose--paper,
.panel-paper .prose { color: var(--ink-text); }

.prose--paper h2,
.prose--paper h3,
.panel-paper .prose h2,
.panel-paper .prose h3 { color: var(--ink-text); }

.prose--paper strong,
.panel-paper .prose strong { color: #9A6B12; }

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

.shell--narrow { max-width: 820px; }

.site-main,
#main-content {
  position: relative;
  z-index: 2;
  display: block;
  min-height: 60vh;
}

.section { padding-block: clamp(48px, 8vw, 104px); }

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

.breathe { padding-block: clamp(40px, 9vw, 128px); }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem 2rem;
  margin-bottom: clamp(20px, 3vw, 38px);
}

.section-head__title {
  margin: 0;
  font-size: clamp(1.35rem, 2.8vw, 2.1rem);
  letter-spacing: -.025em;
  color: var(--paper);
}

.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(18px, 2.4vw, 30px);
}

.span-1 { grid-column: span 1; }
.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-10 { grid-column: span 10; }
.span-11 { grid-column: span 11; }
.span-12 { grid-column: span 12; }

.grid-2,
.grid-3 {
  display: grid;
  gap: clamp(18px, 2.4vw, 28px);
}

.grid-2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(238px, 1fr)); }

.rail {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 3fr);
  gap: clamp(24px, 4vw, 56px);
  align-items: start;
}

.rail__side {
  position: sticky;
  top: 112px;
  display: grid;
  gap: 1.1rem;
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .08em;
  color: var(--dark-muted);
}

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

/* ---------- 5. 层与卡片 ---------- */
.panel-paper {
  background: var(--paper);
  color: var(--ink-text);
  border-radius: var(--radius-panel);
  padding: clamp(20px, 3vw, 38px);
  box-shadow: 0 30px 60px -48px rgba(0, 0, 0, .95);
}

.panel-paper a {
  text-decoration: underline;
  text-decoration-color: rgba(154, 107, 18, .5);
  text-underline-offset: .22em;
}

.panel-glass {
  background: var(--glass-fill);
  border: 1px solid var(--glass-line);
  border-radius: var(--radius-panel);
  padding: clamp(18px, 2.6vw, 30px);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

/* 仪表板数值 */
.stat-board {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: clamp(14px, 2vw, 26px);
}

.stat { display: grid; gap: .4rem; align-content: start; }

.stat__value {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3vw, 2.3rem);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--amber);
  font-variant-numeric: tabular-nums;
}

.stat__label {
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--dark-muted);
}

.panel-paper .stat__value { color: #A4720F; }
.panel-paper .stat__label { color: var(--ink-muted); }

/* ---------- 6. 索引条目 / 状态 / 芯片 ---------- */
.entry {
  display: grid;
  gap: .5rem;
  padding: 1.05rem 0;
  border-top: 1px solid var(--glass-line);
  transition: transform 200ms var(--ease-out);
}

.entry:last-child { border-bottom: 1px solid var(--glass-line); }

.entry__meta {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem 1rem;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .1em;
  color: var(--dark-muted);
}

.entry__title {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: -.01em;
}

.entry:hover { transform: translateY(-2px); }
.entry:hover .entry__title { color: var(--amber); }

.panel-paper .entry { border-color: var(--paper-line); }
.panel-paper .entry__meta { color: var(--ink-muted); }
.panel-paper .entry:hover .entry__title { color: #9A6B12; }

.status-dot {
  display: inline-block;
  flex: none;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--jade);
  box-shadow: 0 0 0 3px rgba(63, 140, 119, .18);
  animation: breathe 3s ease-in-out infinite;
}

.status-dot--alert {
  background: var(--cinnabar);
  box-shadow: 0 0 0 3px rgba(193, 68, 46, .18);
}

.status-dot--gold {
  background: var(--gold);
  box-shadow: 0 0 0 3px rgba(216, 164, 69, .18);
}

@keyframes breathe {
  0%, 100% { opacity: .45; }
  50% { opacity: 1; }
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: .45em;
  padding: .42em .9em;
  border-radius: 999px;
  border: 1px solid var(--glass-line);
  background: rgba(122, 138, 160, .08);
  color: var(--dark-muted);
  font-family: var(--font-mono);
  font-size: .8125rem;
  letter-spacing: .06em;
  line-height: 1.2;
  cursor: pointer;
  transition: color 180ms var(--ease-out), border-color 180ms var(--ease-out), background-color 180ms var(--ease-out);
}

.chip:hover { color: var(--paper); border-color: var(--glass-line-strong); }

.chip[aria-pressed="true"],
.chip[aria-selected="true"] {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--ink-900);
}

/* ---------- 7. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .55em;
  padding: .74em 1.4em;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: .9375rem;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: .02em;
  color: inherit;
  background: none;
  cursor: pointer;
  transition: transform 180ms var(--ease-out), background-color 180ms var(--ease-out), border-color 180ms var(--ease-out), color 180ms var(--ease-out);
}

.btn--gold {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--ink-900);
}

.btn--gold:hover {
  background: var(--amber);
  border-color: var(--amber);
  transform: translateY(-2px);
}

.btn--ghost {
  border-color: var(--glass-line-strong);
  background: rgba(122, 138, 160, .1);
  color: var(--paper);
}

.btn--ghost:hover {
  border-color: var(--amber);
  color: var(--amber);
  transform: translateY(-2px);
}

.btn--paper {
  background: var(--paper);
  border-color: var(--paper);
  color: var(--ink-text);
}

.btn--paper:hover { transform: translateY(-2px); background: #FFF7E8; }

.btn--sm { padding: .5em 1em; font-size: .8125rem; }

.btn--wide { width: 100%; }

/* ---------- 8. 图片容器（页面阶段使用） ---------- */
.media-frame {
  position: relative;
  width: 100%;
  overflow: hidden;
  aspect-ratio: var(--media-ratio, 16 / 9);
  border: 1px solid var(--glass-line);
  border-radius: var(--radius-card);
  background-color: var(--ink-800);
  background-image:
    repeating-linear-gradient(90deg, rgba(122, 138, 160, .13) 0 1px, transparent 1px 42px),
    repeating-linear-gradient(0deg, rgba(122, 138, 160, .13) 0 1px, transparent 1px 42px),
    linear-gradient(155deg, var(--ink-800), var(--ink-900));
}

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

.media-frame--paper {
  border-color: var(--paper-line);
  background-color: var(--paper-2);
  background-image:
    repeating-linear-gradient(90deg, rgba(27, 20, 16, .08) 0 1px, transparent 1px 42px),
    repeating-linear-gradient(0deg, rgba(27, 20, 16, .08) 0 1px, transparent 1px 42px),
    linear-gradient(155deg, #EFE3CE, #DCCFB8);
}

.media-frame > img,
.media-frame > picture > img,
.media-frame > video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame__label {
  position: absolute;
  left: 14px;
  bottom: 12px;
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--dark-muted);
}

.media-frame--paper .media-frame__label { color: var(--ink-muted); }

/* ---------- 9. 可展开内容组 ---------- */
.fold { border-top: 1px solid var(--glass-line); }

.fold__trigger {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  width: 100%;
  padding: 1.05rem 0;
  border: 0;
  background: none;
  color: inherit;
  font-size: 1.02rem;
  font-weight: 600;
  line-height: 1.5;
  text-align: left;
  cursor: pointer;
}

.fold__trigger:hover { color: var(--amber); }

.fold__sign {
  position: relative;
  flex: none;
  width: 22px;
  height: 22px;
  margin-top: .18rem;
  border: 1px solid var(--glass-line-strong);
  border-radius: 50%;
  transition: border-color 200ms var(--ease-out);
}

.fold__sign::before,
.fold__sign::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--gold);
  transform: translate(-50%, -50%);
  transition: transform 220ms var(--ease-out), opacity 200ms var(--ease-out);
}

.fold__sign::before { width: 9px; height: 1.5px; }
.fold__sign::after { width: 1.5px; height: 9px; }

.fold.is-open .fold__sign { border-color: var(--gold); }

.fold.is-open .fold__sign::after {
  transform: translate(-50%, -50%) scaleY(0);
  opacity: 0;
}

.fold__panel {
  height: 0;
  overflow: hidden;
  transition: height var(--dur-collapse) var(--ease-out);
}

.fold.is-open .fold__panel { transition-duration: var(--dur-expand); }

.fold__inner {
  padding: 0 0 1.3rem;
  max-width: 62ch;
  color: var(--dark-muted);
  font-size: .95rem;
}

.fold__inner > :last-child { margin-bottom: 0; }

.fold:last-of-type { border-bottom: 1px solid var(--glass-line); }

.panel-paper .fold { border-color: var(--paper-line); }
.panel-paper .fold__trigger { color: var(--ink-text); }
.panel-paper .fold__sign { border-color: rgba(27, 20, 16, .3); }
.panel-paper .fold__sign::before,
.panel-paper .fold__sign::after { background: #9A6B12; }
.panel-paper .fold__inner { color: var(--ink-muted); }

/* ---------- 10. 面包屑 ---------- */
.breadcrumbs {
  padding-top: clamp(18px, 3vw, 30px);
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .08em;
  color: var(--dark-muted);
}

.breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .55em;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumbs__list li + li::before {
  content: "/";
  margin-right: .55em;
  color: var(--glass);
}

.breadcrumbs a:hover { color: var(--amber); }

.breadcrumbs [aria-current="page"] { color: var(--paper); }

/* ---------- 11. 显现 ---------- */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 520ms var(--ease-out), transform 520ms var(--ease-out);
}

html.js [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

/* ---------- 12. 跳转链接 ---------- */
.skip-link {
  position: absolute;
  left: 16px;
  top: -70px;
  z-index: 200;
  padding: .72em 1.15em;
  border-radius: 0 0 12px 12px;
  background: var(--amber);
  color: var(--ink-900);
  font-size: .875rem;
  font-weight: 700;
  transition: top 180ms var(--ease-out);
}

.skip-link:focus { top: 0; }

/* ---------- 13. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: linear-gradient(180deg, rgba(10, 22, 34, .94), rgba(10, 22, 34, .74));
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}

.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  overflow: hidden;
  background: rgba(122, 138, 160, .16);
}

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

.header-shell {
  padding-top: clamp(12px, 1.8vw, 20px);
  padding-bottom: clamp(10px, 1.4vw, 15px);
  transition: padding 240ms var(--ease-out);
}

.site-header[data-condensed] .header-shell {
  padding-top: 8px;
  padding-bottom: 8px;
}

.header-beam {
  position: relative;
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.6vw, 24px);
  padding: .55rem .6rem .55rem 1.05rem;
  border: 1px solid var(--glass-line);
  border-radius: 999px;
  background: linear-gradient(180deg, rgba(20, 38, 58, .8), rgba(10, 22, 34, .64));
  box-shadow: 0 24px 44px -36px rgba(0, 0, 0, .95);
  transition: border-radius 260ms var(--ease-out), padding 260ms var(--ease-out), background-color 260ms var(--ease-out);
}

.site-header[data-condensed] .header-beam {
  border-radius: 14px;
  padding-top: .34rem;
  padding-bottom: .34rem;
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: .7rem;
  flex: none;
  color: var(--paper);
}

.brand__mark {
  display: grid;
  grid-template-columns: repeat(3, 5px);
  align-items: end;
  gap: 3px;
  height: 18px;
}

.brand__mark i {
  display: block;
  width: 5px;
  border-radius: 1px;
  background: var(--glass);
}

.brand__mark i:nth-child(1) { height: 9px; }
.brand__mark i:nth-child(2) { height: 14px; background: var(--gold); }
.brand__mark i:nth-child(3) { height: 18px; background: var(--amber); }

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.18;
}

.brand__name {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -.01em;
}

.brand__sub {
  font-family: var(--font-mono);
  font-size: .625rem;
  letter-spacing: .14em;
  color: var(--dark-muted);
}

.brand:hover .brand__name { color: var(--amber); }

/* 导航 */
.site-nav {
  display: flex;
  flex: 1 1 auto;
  justify-content: center;
  min-width: 0;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(2px, 1vw, 12px);
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav__link {
  position: relative;
  display: inline-block;
  padding: .5rem .62rem;
  border-radius: 999px;
  font-size: .9375rem;
  letter-spacing: .02em;
  white-space: nowrap;
  color: var(--dark-text);
  transition: color 180ms var(--ease-out);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: .2rem;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--gold);
  transform: translateX(-50%);
  transition: width 200ms var(--ease-out), background-color 200ms var(--ease-out);
}

.site-nav__link:hover { color: var(--amber); }
.site-nav__link:hover::after { width: 58%; }

.site-nav__link[aria-current="page"] { color: var(--gold); }

.site-nav__link[aria-current="page"]::after {
  width: 64%;
  background: var(--gold);
}

/* 工具区 */
.header-tools {
  display: flex;
  align-items: center;
  gap: .55rem;
  flex: none;
  margin-left: auto;
}

.version-chip {
  display: inline-flex;
  align-items: baseline;
  gap: .4em;
  padding: .36em .72em;
  border: 1px dashed var(--glass-line-strong);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .04em;
  color: var(--amber);
  white-space: nowrap;
}

.version-chip__key { color: var(--dark-muted); }

.search-entry {
  display: inline-flex;
  align-items: center;
  gap: .5em;
  padding: .46em .85em;
  border: 1px solid var(--glass-line);
  border-radius: 999px;
  background: rgba(122, 138, 160, .1);
  font-size: .8125rem;
  letter-spacing: .04em;
  color: var(--dark-text);
  transition: border-color 180ms var(--ease-out), color 180ms var(--ease-out);
}

.search-entry__icon {
  position: relative;
  flex: none;
  width: 11px;
  height: 11px;
  border: 1.5px solid currentColor;
  border-radius: 50%;
  opacity: .85;
}

.search-entry__icon::after {
  content: "";
  position: absolute;
  right: -5px;
  bottom: -3px;
  width: 6px;
  height: 1.5px;
  background: currentColor;
  transform: rotate(45deg);
  transform-origin: left center;
}

.search-entry:hover {
  border-color: var(--amber);
  color: var(--amber);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: .5em;
  padding: .5em .85em;
  border: 1px solid var(--glass-line);
  border-radius: 999px;
  background: rgba(122, 138, 160, .1);
  color: var(--dark-text);
  font-size: .8125rem;
  letter-spacing: .04em;
  cursor: pointer;
  transition: border-color 180ms var(--ease-out), color 180ms var(--ease-out);
}

.nav-toggle:hover { border-color: var(--glass-line-strong); }

.nav-toggle__box {
  display: grid;
  gap: 3px;
  width: 16px;
}

.nav-toggle__box i {
  display: block;
  height: 1.5px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 200ms var(--ease-out), opacity 160ms var(--ease-out);
}

.nav-toggle[aria-expanded="true"] {
  border-color: var(--amber);
  color: var(--amber);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__box i:nth-child(1) { transform: translateY(4.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__box i:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__box i:nth-child(3) { transform: translateY(-4.5px) rotate(-45deg); }

/* ---------- 14. 页脚 ---------- */
.site-footer {
  position: relative;
  z-index: 2;
  margin-top: clamp(48px, 8vw, 120px);
  padding-top: clamp(40px, 6vw, 76px);
  border-top: 1px solid var(--glass-line);
  background: linear-gradient(180deg, rgba(20, 38, 58, .55), rgba(10, 22, 34, .98) 62%);
  color: var(--dark-muted);
  font-size: .9rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr .85fr .85fr 1.25fr;
  gap: clamp(24px, 3vw, 44px);
}

.footer-brand__name {
  margin: 0 0 .4em;
  font-size: 1.12rem;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--paper);
}

.footer-brand__sub {
  margin: 0 0 .9em;
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .18em;
  color: var(--gold);
}

.footer-brand__meta {
  margin: 0;
  max-width: 34ch;
  line-height: 1.75;
  color: var(--dark-muted);
}

.footer-col__title {
  margin: 0 0 .9em;
  font-family: var(--font-mono);
  font-size: .6875rem;
  font-weight: 500;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--paper);
}

.footer-links {
  display: grid;
  gap: .55em;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: .9rem;
}

.footer-links a {
  color: var(--dark-muted);
  transition: color 180ms var(--ease-out);
}

.footer-links a:hover { color: var(--amber); }

.footer-contact__row {
  display: flex;
  flex-wrap: wrap;
  gap: .2em .7em;
  margin: 0 0 .55em;
  line-height: 1.7;
}

.footer-contact__key {
  flex: none;
  min-width: 4.6em;
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .14em;
  color: var(--glass);
}

.footer-contact__val { color: var(--dark-text); }

.footer-contact__val--mono {
  font-family: var(--font-mono);
  letter-spacing: .03em;
}

.footer-note {
  display: flex;
  align-items: flex-start;
  gap: .7rem;
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: .95rem 1.2rem;
  border: 1px solid var(--glass-line);
  border-left: 2px solid var(--gold);
  border-radius: 0 14px 14px 0;
  background: rgba(122, 138, 160, .08);
  font-size: .875rem;
  line-height: 1.7;
}

.footer-note .status-dot { margin-top: .55em; }

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .8rem 1.8rem;
  margin-top: clamp(24px, 3vw, 38px);
  padding-block: 1.15rem clamp(18px, 2.4vw, 26px);
  border-top: 1px solid var(--glass-line);
}

.footer-legal__copy {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .04em;
  color: var(--glass);
}

.footer-legal__links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2em;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .06em;
}

.footer-legal__links a { color: var(--dark-muted); }
.footer-legal__links a:hover { color: var(--amber); }

/* ---------- 15. 响应式 ---------- */
@media (max-width: 1024px) {
  .grid { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .grid > [class*="span-"] { grid-column: 1 / -1; }

  .rail { grid-template-columns: minmax(0, 1fr); }
  .rail__side { position: static; top: auto; }

  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 1080px) {
  .header-beam {
    flex-wrap: wrap;
    border-radius: 18px;
    padding: .6rem .7rem;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    display: block;
    flex: none;
    padding: .6rem;
    border: 1px solid var(--glass-line);
    border-radius: 20px;
    background: linear-gradient(180deg, rgba(20, 38, 58, .97), rgba(10, 22, 34, .97));
    -webkit-backdrop-filter: blur(16px);
    backdrop-filter: blur(16px);
    box-shadow: 0 30px 60px -40px rgba(0, 0, 0, .95);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 200ms var(--ease-out), transform 200ms var(--ease-out), visibility 200ms var(--ease-out);
  }

  html:not(.js) .site-nav {
    position: static;
    flex-basis: 100%;
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .site-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

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

  .site-nav__item { width: 100%; }

  .site-nav__link {
    display: block;
    padding: .85rem .95rem;
    border-radius: 14px;
    font-size: 1rem;
  }

  .site-nav__link::after {
    left: .95rem;
    bottom: .6rem;
    transform: none;
  }

  .site-nav__link:hover { background: rgba(122, 138, 160, .12); }
  .site-nav__link:hover::after { width: 22px; }

  .site-nav__link[aria-current="page"] {
    background: rgba(122, 138, 160, .12);
  }

  .site-nav__link[aria-current="page"]::after { width: 22px; }

  .nav-toggle { display: inline-flex; }
}

@media (max-width: 720px) {
  .brand__sub { display: none; }
  .version-chip { display: none; }
  .search-entry__text { display: none; }
  .search-entry { padding: .5em .72em; }
  .header-cta { padding: .5em .9em; font-size: .8125rem; }

  .footer-grid { grid-template-columns: 1fr; gap: 26px; }
  .footer-brand { grid-column: auto; }

  .footer-legal { justify-content: flex-start; }
}

@media (max-width: 420px) {
  .header-cta { display: none; }
  .stat-board { grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); }
}

/* ---------- 16. 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

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

  html.js [data-reveal] {
    opacity: 1;
    transform: none;
  }
}