/* ============================================================
   贝斯特2255 · 共享样式表 /assets/site.css
   深空黑基底 + 电光青入口高亮 + 信号橙行动点
   ============================================================ */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 104px;
}

body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--ink);
  background-image:
    radial-gradient(120% 70% at 82% -10%, rgba(127, 231, 255, 0.09), transparent 62%),
    radial-gradient(90% 60% at 0% 0%, rgba(255, 138, 61, 0.05), transparent 58%);
  background-repeat: no-repeat;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 450;
  line-height: 1.72;
  letter-spacing: 0.004em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
input, textarea, select { font: inherit; color: inherit; }
table { border-collapse: collapse; width: 100%; }
[hidden] { display: none !important; }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ---------- 2. 变量 ---------- */
:root {
  --ink: #070B14;
  --panel: #0E1626;
  --slab: #152238;
  --line: #1F3352;

  --text: #E8F1FF;
  --muted: #9AA9C4;

  --cyan: #7FE7FF;
  --orange: #FF8A3D;
  --green: #3DDC97;
  --red: #FF5C7A;

  --cyan-soft: rgba(127, 231, 255, 0.12);
  --orange-soft: rgba(255, 138, 61, 0.14);

  --font-head: "Inter", "HarmonyOS Sans SC", "Noto Sans SC", "PingFang SC", sans-serif;
  --font-body: "Inter", "Noto Sans SC", "PingFang SC", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", "Cascadia Code", monospace;

  --shell: 1200px;
  --gutter: clamp(16px, 4vw, 40px);

  --r-s: 10px;
  --r-m: 16px;
  --r-l: 22px;
  --r-pill: 999px;

  --hair: 1px solid rgba(31, 51, 82, 0.9);
  --shadow-1: 0 1px 0 rgba(232, 241, 255, 0.04), 0 14px 34px -22px rgba(0, 0, 0, 0.95);
  --shadow-2: 0 26px 64px -32px rgba(0, 0, 0, 0.96), 0 0 0 1px rgba(127, 231, 255, 0.16);

  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
  --t: 180ms;
}

/* ---------- 3. 排版 ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 850;
  line-height: 1.12;
  letter-spacing: -0.022em;
  color: var(--text);
}

h1 { font-size: clamp(34px, 5.2vw, 64px); }
h2 { font-size: clamp(26px, 3.4vw, 36px); }
h3 { font-size: clamp(19px, 2vw, 22px); }

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}
.eyebrow::before {
  content: "";
  width: 18px;
  height: 1px;
  background: currentColor;
  opacity: 0.7;
}

.section-title { font-size: clamp(26px, 3.4vw, 36px); }

.lede {
  max-width: 62ch;
  font-size: clamp(15px, 1.5vw, 17.5px);
  line-height: 1.8;
  color: #B9C7E0;
}

.prose {
  max-width: 68ch;
  font-size: 16.5px;
  line-height: 1.82;
  color: #C9D6EC;
}
.prose > * + * { margin-top: 1em; }
.prose h2 { margin-top: 1.8em; font-size: clamp(22px, 2.6vw, 28px); }
.prose h3 { margin-top: 1.5em; }
.prose ul, .prose ol { padding-left: 1.2em; }
.prose ul li { list-style: none; position: relative; padding-left: 16px; }
.prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.75em;
  width: 6px;
  height: 6px;
  border-radius: 2px;
  background: var(--cyan);
  opacity: 0.85;
}
.prose ol { list-style: decimal; }
.prose li + li { margin-top: 0.45em; }
.prose a {
  color: var(--cyan);
  border-bottom: 1px solid rgba(127, 231, 255, 0.35);
}
.prose a:hover { border-bottom-color: var(--cyan); }

/* ---------- 4. 布局容器 ---------- */
.container {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

main { padding-top: clamp(104px, 13vw, 144px); }
.main-flush { padding-top: 0; }

.section { padding-block: clamp(44px, 7vw, 88px); }
.section--tight { padding-block: clamp(26px, 4vw, 48px); }

.section-head {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: clamp(20px, 3vw, 36px);
  max-width: 72ch;
}

.stack > * + * { margin-top: var(--stack-gap, 14px); }
.btn-row { display: flex; flex-wrap: wrap; gap: 10px; }
.divider {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, rgba(31, 51, 82, 0), rgba(31, 51, 82, 1), rgba(31, 51, 82, 0));
}

/* ---------- 5. 网格 ---------- */
.grid {
  display: grid;
  gap: clamp(14px, 2vw, 22px);
}
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); }
.grid--split { grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr); }

.card-grid {
  display: grid;
  gap: clamp(14px, 2vw, 22px);
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* ---------- 6. 卡片 / 面板 / 数据 ---------- */
.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px;
  border: var(--hair);
  border-radius: var(--r-m);
  background: linear-gradient(180deg, rgba(21, 34, 56, 0.55), rgba(14, 22, 38, 0.88));
  box-shadow: var(--shadow-1);
  transition: transform var(--t) var(--ease), border-color var(--t) var(--ease),
              box-shadow var(--t) var(--ease), background var(--t) var(--ease);
}
.card:hover {
  transform: translateY(-3px);
  border-color: rgba(127, 231, 255, 0.4);
  background: linear-gradient(180deg, rgba(31, 51, 82, 0.6), rgba(14, 22, 38, 0.92));
  box-shadow: var(--shadow-2);
}
.card-title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 19px;
  letter-spacing: -0.015em;
  line-height: 1.3;
}
.card-text { font-size: 14.5px; line-height: 1.72; color: var(--muted); }

.panel {
  border: var(--hair);
  border-radius: var(--r-l);
  background: rgba(14, 22, 38, 0.72);
  padding: clamp(18px, 2.6vw, 28px);
  box-shadow: var(--shadow-1);
}

.stat { display: flex; flex-direction: column; gap: 2px; }
.stat-value {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}
.stat-label { font-size: 12.5px; color: var(--muted); }

/* ---------- 7. 按钮 / 标签 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border: 1px solid transparent;
  border-radius: var(--r-pill);
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.012em;
  white-space: nowrap;
  transition: transform var(--t) var(--ease), background var(--t) var(--ease),
              color var(--t) var(--ease), border-color var(--t) var(--ease),
              box-shadow var(--t) var(--ease);
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn--signal {
  background: var(--orange);
  color: #1A0C02;
  box-shadow: 0 12px 28px -16px rgba(255, 138, 61, 0.95);
}
.btn--signal:hover { background: #FFA05F; box-shadow: 0 16px 34px -16px rgba(255, 138, 61, 0.9); }

.btn--cyan { background: var(--cyan); color: #04222C; }
.btn--cyan:hover { background: #A6EFFF; }

.btn--ghost {
  border-color: var(--line);
  background: rgba(21, 34, 56, 0.5);
  color: var(--text);
}
.btn--ghost:hover {
  border-color: rgba(127, 231, 255, 0.5);
  color: var(--cyan);
  background: var(--cyan-soft);
}

.btn--quiet { padding: 8px 14px; color: var(--muted); font-weight: 600; }
.btn--quiet:hover { color: var(--cyan); }

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

.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 13px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: rgba(21, 34, 56, 0.6);
  font-size: 12.5px;
  line-height: 1.4;
  color: #C6D3EA;
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease),
              background var(--t) var(--ease);
}
.chip:hover {
  color: var(--cyan);
  border-color: rgba(127, 231, 255, 0.45);
  background: var(--cyan-soft);
}
.chip.is-active,
.chip[aria-pressed="true"] {
  color: #04222C;
  background: var(--cyan);
  border-color: var(--cyan);
  font-weight: 700;
}

.tag {
  display: inline-block;
  padding: 3px 7px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 700;
  color: var(--cyan);
}
.link-arrow::after {
  content: "\2192";
  transition: transform var(--t) var(--ease);
}
.link-arrow:hover::after { transform: translateX(4px); }

/* ---------- 8. 面包屑 ---------- */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
}
.breadcrumbs li { display: inline-flex; align-items: center; gap: 8px; }
.breadcrumbs li + li::before { content: "/"; color: var(--line); }
.breadcrumbs a { color: var(--muted); transition: color var(--t) var(--ease); }
.breadcrumbs a:hover { color: var(--cyan); }
.breadcrumbs [aria-current="page"] { color: var(--text); }

/* ---------- 9. 图像容器 ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  border: var(--hair);
  border-radius: var(--r-m);
  background: linear-gradient(140deg, var(--slab), var(--panel));
  aspect-ratio: 16 / 10;
}
.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--square { aspect-ratio: 1 / 1; }

.media-grid {
  display: grid;
  gap: clamp(12px, 1.8vw, 18px);
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}
.media-caption {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

/* ---------- 10. 显现 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 420ms var(--ease), transform 420ms var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
}
[data-reveal][data-revealed] {
  opacity: 1;
  transform: none;
}

/* ---------- 11. 跳至主要内容 ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 200;
  padding: 10px 18px;
  border-radius: var(--r-pill);
  background: var(--cyan);
  color: #04222C;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 14px;
  transform: translateY(-160%);
  transition: transform var(--t) var(--ease);
}
.skip-link:focus-visible { transform: translateY(0); }

/* ---------- 12. 头部 ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 60;
  padding: 14px var(--gutter) 0;
  transition: padding var(--t) var(--ease);
}

.header-shell {
  position: relative;
  width: min(var(--shell), 100%);
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 9px 12px 9px 14px;
  border: var(--hair);
  border-radius: var(--r-pill);
  background: rgba(14, 22, 38, 0.78);
  box-shadow: var(--shadow-1);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  transition: background var(--t) var(--ease), box-shadow var(--t) var(--ease),
              border-color var(--t) var(--ease);
}
.site-header.is-scrolled { padding-top: 8px; }
.site-header.is-scrolled .header-shell {
  background: rgba(7, 11, 20, 0.94);
  border-color: rgba(31, 51, 82, 1);
  box-shadow: 0 20px 48px -30px rgba(0, 0, 0, 0.98), 0 0 0 1px rgba(127, 231, 255, 0.07);
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  padding: 3px 8px 3px 3px;
  border-radius: var(--r-pill);
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: linear-gradient(140deg, var(--cyan), #3FB4D8);
  color: #04222C;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  box-shadow: 0 0 0 1px rgba(127, 231, 255, 0.35), 0 10px 22px -14px rgba(127, 231, 255, 0.9);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 15px;
  letter-spacing: -0.02em;
  color: var(--text);
}
.brand-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 3px rgba(61, 220, 151, 0.16);
}
.status-dot--live { background: var(--green); }

/* 主导航 */
.primary-nav {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  justify-content: center;
}
.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
}
.nav-link {
  position: relative;
  display: inline-block;
  padding: 9px 13px;
  border-radius: var(--r-pill);
  font-size: 14px;
  font-weight: 500;
  line-height: 1.3;
  white-space: nowrap;
  color: var(--muted);
  transition: color var(--t) var(--ease), background var(--t) var(--ease),
              box-shadow var(--t) var(--ease);
}
.nav-link:hover {
  color: var(--text);
  background: rgba(21, 34, 56, 0.9);
}
.nav-link[aria-current="page"] {
  color: var(--cyan);
  background: var(--cyan-soft);
  box-shadow: inset 0 0 0 1px rgba(127, 231, 255, 0.3);
}

/* 右侧动作区 */
.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
  margin-left: auto;
}
.icon-btn {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid transparent;
  border-radius: var(--r-pill);
  color: var(--muted);
  transition: color var(--t) var(--ease), background var(--t) var(--ease),
              border-color var(--t) var(--ease);
}
.icon-btn:hover {
  color: var(--text);
  background: rgba(21, 34, 56, 0.9);
  border-color: var(--line);
}
.icon-btn[aria-expanded="true"] {
  color: var(--cyan);
  background: var(--cyan-soft);
  border-color: rgba(127, 231, 255, 0.4);
}
.icon { width: 18px; height: 18px; }
.header-cta { padding: 10px 16px; }

/* 移动菜单按钮 */
.nav-toggle {
  display: none;
  place-items: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  color: var(--text);
  transition: border-color var(--t) var(--ease), color var(--t) var(--ease),
              background var(--t) var(--ease);
}
.nav-toggle:hover { border-color: rgba(127, 231, 255, 0.5); color: var(--cyan); }
.nav-toggle-bars {
  position: relative;
  display: block;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
}
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform var(--t) var(--ease), opacity var(--t) 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 { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after { transform: translateY(-5px) rotate(-45deg); }

/* 滚动态进度条 */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: 80;
  pointer-events: none;
}
.scroll-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan), var(--orange));
}

/* 快速跳转浮层 */
.quickjump {
  width: min(var(--shell), 100%);
  margin: 10px auto 0;
  padding: 16px;
  border: var(--hair);
  border-radius: var(--r-l);
  background: rgba(9, 14, 26, 0.96);
  box-shadow: var(--shadow-2);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}
.quickjump__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}
.quickjump__title {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}
.quickjump__hint {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted);
}
.quickjump__field {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: rgba(21, 34, 56, 0.6);
  transition: border-color var(--t) var(--ease), box-shadow var(--t) var(--ease);
}
.quickjump__field:focus-within {
  border-color: rgba(127, 231, 255, 0.55);
  box-shadow: 0 0 0 4px rgba(127, 231, 255, 0.1);
}
.quickjump__prefix { font-size: 14px; color: var(--cyan); }
.quickjump__input {
  flex: 1 1 auto;
  min-width: 0;
  border: 0;
  background: none;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--text);
}
.quickjump__input::placeholder { color: var(--muted); }
.quickjump__input:focus { outline: none; }

.quickjump__list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 6px;
  margin-top: 12px;
  max-height: min(52vh, 400px);
  overflow: auto;
}
.quickjump__item {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid transparent;
  border-radius: 12px;
  font-size: 14px;
  color: var(--text);
  transition: background var(--t) var(--ease), border-color var(--t) var(--ease),
              color var(--t) var(--ease);
}
.quickjump__item:hover {
  background: rgba(21, 34, 56, 0.85);
  border-color: var(--line);
  color: var(--cyan);
}
.quickjump__index {
  font-size: 11px;
  color: var(--cyan);
  opacity: 0.75;
}
.quickjump__route {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted);
}
.quickjump__empty {
  margin-top: 14px;
  font-size: 13px;
  color: var(--muted);
}

/* ---------- 13. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 9vw, 120px);
  padding: clamp(40px, 6vw, 76px) 0 28px;
  border-top: 1px solid var(--line);
  background:
    radial-gradient(120% 80% at 6% 0%, rgba(127, 231, 255, 0.08), transparent 60%),
    linear-gradient(180deg, rgba(14, 22, 38, 0.9), rgba(7, 11, 20, 1));
}
.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: min(340px, 42%);
  height: 1px;
  background: linear-gradient(90deg, var(--cyan), transparent);
}

.footer-inner { display: flex; flex-direction: column; gap: clamp(28px, 4vw, 44px); }

.footer-brand { display: flex; flex-direction: column; gap: 12px; }
.footer-tagline {
  max-width: 42ch;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--muted);
}
.footer-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  align-self: flex-start;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: rgba(21, 34, 56, 0.5);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: #C6D3EA;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 0.8fr) minmax(0, 1.25fr);
  gap: clamp(24px, 4vw, 56px);
  padding-top: clamp(24px, 3vw, 36px);
  border-top: 1px solid rgba(31, 51, 82, 0.7);
}
.footer-col { display: flex; flex-direction: column; gap: 14px; min-width: 0; }
.footer-title {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}
.footer-list { display: flex; flex-direction: column; gap: 9px; }
.footer-link {
  display: inline-block;
  font-size: 14.5px;
  color: #C2D0E8;
  transition: color var(--t) var(--ease), transform var(--t) var(--ease);
}
.footer-link:hover { color: var(--cyan); transform: translateX(3px); }

.footer-contact { display: grid; gap: 14px; }
.footer-contact__row { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.footer-label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}
.footer-detail {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  font-size: 14.5px;
  color: var(--text);
}
.footer-value { word-break: break-word; }
.copy-btn {
  padding: 3px 10px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--muted);
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease),
              background var(--t) var(--ease);
}
.copy-btn:hover {
  color: var(--cyan);
  border-color: rgba(127, 231, 255, 0.5);
  background: var(--cyan-soft);
}
.copy-btn[data-copied] {
  color: var(--green);
  border-color: rgba(61, 220, 151, 0.5);
  background: rgba(61, 220, 151, 0.12);
}
.footer-note { font-size: 12.5px; color: var(--muted); }

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: clamp(18px, 2.4vw, 26px);
  border-top: 1px solid rgba(31, 51, 82, 0.7);
  font-size: 13px;
  color: var(--muted);
}
.footer-legal { color: var(--muted); }
.footer-meta { font-size: 12.5px; color: #7E8CA8; }

/* ---------- 14. 动效偏好 ---------- */
@media (prefers-reduced-motion: no-preference) {
  .status-dot--live { animation: status-pulse 2600ms ease-in-out infinite; }
}
@keyframes status-pulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(61, 220, 151, 0.16); }
  50% { box-shadow: 0 0 0 6px rgba(61, 220, 151, 0.06); }
}

/* ---------- 15. 响应式 ---------- */
@media (max-width: 1180px) {
  .nav-link { padding: 9px 10px; font-size: 13.5px; }
  .header-shell { gap: 12px; }
}

@media (max-width: 980px) {
  html { scroll-padding-top: 92px; }

  .site-header { padding: 10px var(--gutter) 0; }
  .header-shell { padding: 8px 10px 8px 12px; border-radius: var(--r-l); }

  .nav-toggle { display: grid; }

  .primary-nav {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 10px;
    border: var(--hair);
    border-radius: var(--r-l);
    background: rgba(9, 14, 26, 0.97);
    box-shadow: var(--shadow-2);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
  }
  .primary-nav[data-open] { display: flex; }
  .nav-list { flex-direction: column; align-items: stretch; gap: 2px; }
  .nav-link {
    padding: 12px 14px;
    border-radius: 12px;
    font-size: 15px;
  }
  .nav-link[aria-current="page"] { box-shadow: inset 3px 0 0 var(--cyan); }

  .grid--split { grid-template-columns: minmax(0, 1fr); }
  .footer-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
}

@media (max-width: 640px) {
  body { font-size: 15.5px; }
  .header-cta { padding: 9px 13px; font-size: 13px; }
  .icon-btn { width: 34px; height: 34px; }
  .footer-grid { grid-template-columns: minmax(0, 1fr); gap: 28px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .quickjump__list { grid-template-columns: minmax(0, 1fr); }
  .quickjump__hint { display: none; }
}

@media (max-width: 400px) {
  .brand-status { display: none; }
}

/* ---------- 16. 减弱动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  [data-reveal] { opacity: 1 !important; transform: none !important; }
  .card:hover { transform: none; }
  .btn:hover { transform: none; }
  .footer-link:hover { transform: none; }
}