/* ============================================================
   易倍看台 · 共享外壳样式表  /assets/site.css
   深夜看台 + 数据仪表盘：墨绿底、奶油纸面、荧光青指标、暖橙行动点
   ============================================================ */

/* ---------- 1. 变量 ---------- */
:root {
  --c-ink: #06231C;
  --c-panel: #0C3A2D;
  --c-glass: #14513F;
  --c-paper: #F4EDDF;
  --c-paper-2: #E3D8C2;
  --c-brown: #241A12;
  --c-cyan: #2CE6C0;
  --c-orange: #FF7A33;
  --c-mist: #7E968D;
  --c-edge: #3E6B5E;

  --f-display: "Alibaba PuHuiTi 3.0 Heavy", "Source Han Sans SC Heavy", "Noto Sans SC", system-ui, sans-serif;
  --f-body: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", system-ui, sans-serif;
  --f-num: "JetBrains Mono", "Roboto Mono", "SFMono-Regular", ui-monospace, monospace;

  --shell-max: 1480px;
  --shell-pad: clamp(16px, 3vw, 40px);
  --r-lg: 26px;
  --r-md: 18px;
  --r-sm: 12px;
  --r-pill: 999px;
  --ease: cubic-bezier(.22, .61, .36, 1);
  --header-h: 104px;
}

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

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

body {
  margin: 0;
  background: var(--c-ink);
  color: var(--c-paper);
  font-family: var(--f-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.85;
  letter-spacing: .01em;
  min-height: 100vh;
  overflow-x: hidden;
}

img,
svg,
video { max-width: 100%; }

ul,
ol { margin: 0; padding: 0; list-style: none; }

button { font: inherit; color: inherit; }

a { color: inherit; }

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

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

/* ---------- 3. 中文排版基线 ---------- */
h1, h2, h3, h4 {
  font-family: var(--f-display);
  font-weight: 900;
  letter-spacing: -.02em;
  line-height: 1.08;
  margin: 0 0 .55em;
  color: var(--c-paper);
}

h1 { font-size: clamp(38px, 6.4vw, 88px); }
h2 { font-size: clamp(26px, 3.4vw, 42px); }
h3 { font-size: clamp(19px, 2.1vw, 28px); }
h4 { font-size: 17px; letter-spacing: 0; }

p { margin: 0 0 1.1em; }

strong { font-weight: 700; }

code,
kbd {
  font-family: var(--f-num);
  font-size: .92em;
}

#main-content {
  display: block;
  scroll-margin-top: calc(var(--header-h) + 8px);
}

/* ---------- 4. 跳转链接 ---------- */
.skip-link {
  position: absolute;
  left: 12px;
  top: -80px;
  z-index: 200;
  padding: 10px 18px;
  border-radius: var(--r-pill);
  background: var(--c-cyan);
  color: var(--c-ink);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  text-decoration: none;
  transition: top .18s var(--ease);
}

.skip-link:focus {
  top: 12px;
}

/* ---------- 5. 顶栏 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: linear-gradient(180deg, rgba(6, 35, 28, .985), rgba(6, 35, 28, .92));
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  backdrop-filter: blur(16px) saturate(150%);
  border-bottom: 1px solid var(--c-edge);
}

.site-header::after {
  content: "";
  position: absolute;
  left: 0;
  top: 31px;
  bottom: -1px;
  width: 3px;
  background: linear-gradient(180deg, var(--c-cyan), rgba(44, 230, 192, 0));
  pointer-events: none;
}

/* 状态条 */
.status-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  height: 31px;
  padding: 0 var(--shell-pad);
  background: rgba(12, 58, 45, .82);
  border-bottom: 1px solid rgba(62, 107, 94, .5);
  font-family: var(--f-num);
  font-size: 11.5px;
  letter-spacing: .05em;
  color: var(--c-mist);
  white-space: nowrap;
  overflow: hidden;
}

.status-bar__pulse {
  flex: none;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--c-cyan);
  box-shadow: 0 0 0 0 rgba(44, 230, 192, .55);
  animation: pulse 2.6s var(--ease) infinite;
}

@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 rgba(44, 230, 192, .5); }
  70%  { box-shadow: 0 0 0 9px rgba(44, 230, 192, 0); }
  100% { box-shadow: 0 0 0 0 rgba(44, 230, 192, 0); }
}

.status-bar__label { color: rgba(126, 150, 141, .85); }

.status-bar__value { color: var(--c-paper); }

.status-bar__value--accent { color: var(--c-cyan); }

.status-bar__div {
  flex: none;
  width: 1px;
  height: 11px;
  background: var(--c-edge);
}

.status-bar__spacer { flex: 1 1 auto; }

.status-bar__time { color: rgba(126, 150, 141, .8); }

/* 顶栏主体网格 */
.header-frame {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: clamp(14px, 2.2vw, 38px);
  width: 100%;
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 12px var(--shell-pad);
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 3px;
  text-decoration: none;
  color: var(--c-paper);
  min-width: 0;
}

.brand__mark {
  font-family: var(--f-display);
  font-size: 22px;
  font-weight: 900;
  letter-spacing: -.02em;
  line-height: 1.12;
}

.brand__meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 11.5px;
  letter-spacing: .07em;
  color: var(--c-mist);
  line-height: 1.4;
}

.brand__domain {
  font-family: var(--f-num);
  color: rgba(44, 230, 192, .85);
}

.brand__tagline {
  position: relative;
  padding-left: 11px;
}

.brand__tagline::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--c-edge);
  transform: translateY(-50%);
}

/* 导航胶囊 */
.primary-nav {
  display: flex;
  align-items: center;
  justify-self: center;
  min-width: 0;
}

.primary-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 5px;
  border: 1px solid rgba(62, 107, 94, .62);
  border-radius: var(--r-pill);
  background: rgba(12, 58, 45, .55);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.primary-nav__item { display: block; }

.primary-nav__link {
  display: block;
  padding: 8px 13px;
  border-radius: var(--r-pill);
  border: 1px solid transparent;
  font-size: 13.5px;
  font-weight: 500;
  letter-spacing: .06em;
  line-height: 1.3;
  color: var(--c-mist);
  text-decoration: none;
  white-space: nowrap;
  transition: color .18s var(--ease), background-color .18s var(--ease), border-color .18s var(--ease);
}

.primary-nav__link:hover {
  color: var(--c-paper);
  background: rgba(20, 81, 63, .8);
}

.primary-nav__link[aria-current="page"] {
  color: var(--c-ink);
  background: var(--c-cyan);
  border-color: var(--c-cyan);
  font-weight: 700;
}

.primary-nav__extra { display: none; }

/* 工具区 */
.header-tools {
  display: flex;
  align-items: center;
  gap: 9px;
}

.tool-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 15px;
  border-radius: var(--r-pill);
  border: 1px dashed var(--c-edge);
  background: transparent;
  color: var(--c-paper);
  font-size: 13px;
  letter-spacing: .06em;
  cursor: pointer;
  transition: border-color .18s var(--ease), color .18s var(--ease), background-color .18s var(--ease);
}

.tool-btn:hover { border-color: var(--c-mist); }

.tool-btn[aria-pressed="true"] {
  border-style: solid;
  border-color: var(--c-cyan);
  color: var(--c-cyan);
  background: rgba(44, 230, 192, .09);
}

.tool-btn__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  border: 1px solid var(--c-mist);
  background: transparent;
  transition: background-color .18s var(--ease), border-color .18s var(--ease), box-shadow .18s var(--ease);
}

.tool-btn[aria-pressed="true"] .tool-btn__dot {
  background: var(--c-cyan);
  border-color: var(--c-cyan);
  box-shadow: 0 0 10px rgba(44, 230, 192, .65);
}

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 16px;
  border-radius: var(--r-pill);
  border: 1px solid var(--c-edge);
  background: rgba(12, 58, 45, .8);
  color: var(--c-paper);
  font-size: 13px;
  letter-spacing: .07em;
  cursor: pointer;
}

.nav-toggle__text { line-height: 1; }

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  width: 16px;
}

.nav-toggle__bar {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: var(--c-cyan);
  transition: transform .18s var(--ease);
}

.site-header[data-open] .nav-toggle__bar:first-child { transform: translateY(3px) rotate(45deg); }
.site-header[data-open] .nav-toggle__bar:last-child { transform: translateY(-3px) rotate(-45deg); }

/* 阅读进度仪表 */
.scroll-meter {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: rgba(62, 107, 94, .38);
  pointer-events: none;
}

.scroll-meter__fill {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--c-cyan), var(--c-orange));
}

/* ---------- 6. 通用容器与章节 ---------- */
.container {
  width: 100%;
  max-width: var(--shell-max);
  margin: 0 auto;
  padding-inline: var(--shell-pad);
}

.section { padding-block: clamp(34px, 5vw, 76px); }

.section__head {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-width: 66ch;
  margin-bottom: clamp(20px, 3vw, 36px);
}

.eyebrow {
  font-family: var(--f-num);
  font-size: 11.5px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--c-cyan);
  margin: 0;
}

.lede {
  margin: 0;
  font-size: clamp(16px, 1.5vw, 18.5px);
  line-height: 1.8;
  color: rgba(244, 237, 223, .78);
  max-width: 62ch;
}

.divider {
  height: 1px;
  border: 0;
  margin: clamp(24px, 4vw, 52px) 0;
  background: linear-gradient(90deg, var(--c-edge), rgba(62, 107, 94, 0));
}

/* ---------- 7. 按钮与胶囊 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 17px;
  border-radius: var(--r-pill);
  border: 1px solid transparent;
  font-family: var(--f-body);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .06em;
  line-height: 1.4;
  text-decoration: none;
  cursor: pointer;
  transition: background-color .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}

.btn--ghost {
  color: var(--c-paper);
  border-color: var(--c-edge);
  background: rgba(20, 81, 63, .35);
}

.btn--ghost:hover {
  background: var(--c-glass);
  border-color: var(--c-mist);
}

.btn--accent {
  color: #1B0E06;
  background: var(--c-orange);
  border-color: var(--c-orange);
}

.btn--accent:hover { background: #FF8F52; }

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

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px;
  border-radius: var(--r-pill);
  border: 1px solid var(--c-edge);
  color: var(--c-mist);
  font-size: 12px;
  letter-spacing: .06em;
  line-height: 1.6;
  white-space: nowrap;
}

.chip--cyan {
  color: var(--c-cyan);
  border-color: rgba(44, 230, 192, .48);
  background: rgba(44, 230, 192, .08);
}

.chip--orange {
  color: var(--c-orange);
  border-color: rgba(255, 122, 51, .48);
  background: rgba(255, 122, 51, .09);
}

.chip--paper {
  color: var(--c-brown);
  border-color: rgba(36, 26, 18, .18);
  background: var(--c-paper-2);
}

/* ---------- 8. 数据组件 ---------- */
.stat { display: flex; flex-direction: column; gap: 5px; }

.stat__num {
  font-family: var(--f-num);
  font-size: clamp(30px, 4vw, 44px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--c-cyan);
}

.stat__label {
  font-size: 12.5px;
  letter-spacing: .08em;
  color: var(--c-mist);
}

.card {
  padding: clamp(18px, 2.4vw, 28px);
  border: 1px solid var(--c-edge);
  border-radius: var(--r-lg);
  background: linear-gradient(160deg, rgba(20, 81, 63, .55), rgba(12, 58, 45, .88));
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.card__title {
  margin: 0 0 8px;
  font-family: var(--f-display);
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--c-paper);
}

.card__meta {
  margin: 0 0 10px;
  font-family: var(--f-num);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--c-mist);
}

.card__body {
  margin: 0;
  font-size: 15px;
  color: rgba(244, 237, 223, .78);
}

/* ---------- 9. 主题筛选 ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.filter-btn {
  padding: 7px 15px;
  border-radius: var(--r-pill);
  border: 1px solid var(--c-edge);
  background: rgba(12, 58, 45, .7);
  color: var(--c-mist);
  font-family: var(--f-body);
  font-size: 12.5px;
  letter-spacing: .06em;
  cursor: pointer;
  transition: color .18s var(--ease), background-color .18s var(--ease), border-color .18s var(--ease);
}

.filter-btn:hover { color: var(--c-paper); }

.filter-btn[aria-pressed="true"] {
  color: #1B0E06;
  background: var(--c-orange);
  border-color: var(--c-orange);
  font-weight: 700;
}

.filter-count {
  margin-left: 4px;
  font-family: var(--f-num);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--c-mist);
}

/* ---------- 10. 显现动效 ---------- */
html.js-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .42s var(--ease), transform .42s var(--ease);
}

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

/* ---------- 11. 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 clamp(18px, 2.6vw, 30px);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--c-mist);
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.breadcrumb__item { display: inline-flex; align-items: center; gap: 8px; }

.breadcrumb__link {
  color: var(--c-mist);
  text-decoration: none;
  transition: color .18s var(--ease);
}

.breadcrumb__link:hover { color: var(--c-cyan); }

.breadcrumb__sep {
  color: rgba(126, 150, 141, .5);
  font-family: var(--f-num);
}

.breadcrumb__current { color: var(--c-paper); }

/* ---------- 12. 阅读区 ---------- */
.paper {
  padding: clamp(22px, 4vw, 46px);
  border-radius: var(--r-lg);
  background: var(--c-paper);
  color: var(--c-brown);
}

.paper h2,
.paper h3,
.paper h4 { color: var(--c-brown); }

.paper a {
  color: var(--c-panel);
  text-decoration: underline;
  text-decoration-color: rgba(12, 58, 45, .35);
  text-underline-offset: 3px;
}

.paper a:hover { text-decoration-color: var(--c-orange); }

.prose {
  max-width: 74ch;
  font-size: 16.5px;
  line-height: 1.9;
}

.prose p { margin: 0 0 1.3em; }
.prose ul,
.prose ol { margin: 0 0 1.3em; padding-left: 1.25em; }
.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }
.prose li { margin-bottom: .5em; }

.prose blockquote {
  margin: 1.6em 0;
  padding: 2px 0 2px 18px;
  border-left: 3px solid var(--c-orange);
  color: rgba(36, 26, 18, .82);
}

.prose code {
  padding: 2px 7px;
  border-radius: 6px;
  background: var(--c-paper-2);
}

.prose table {
  width: 100%;
  margin: 0 0 1.6em;
  border-collapse: collapse;
  font-size: 14.5px;
}

.prose th,
.prose td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid rgba(36, 26, 18, .14);
}

.prose thead th {
  font-family: var(--f-num);
  font-size: 12px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: rgba(36, 26, 18, .62);
}

.prose tbody tr:nth-child(even) { background: var(--c-paper-2); }

/* ---------- 13. 图片容器基础规则 ---------- */
.media {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--c-edge);
  border-radius: var(--r-lg);
  background: linear-gradient(135deg, var(--c-panel), #04180F);
  isolation: isolate;
}

.media__img,
.media img,
.media svg,
.media video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media--16x9 { aspect-ratio: 16 / 9; }
.media--4x3  { aspect-ratio: 4 / 3; }
.media--1x1  { aspect-ratio: 1 / 1; }
.media--tall { aspect-ratio: 3 / 4; }
.media--wide { aspect-ratio: 21 / 9; }

.media--glass {
  background: rgba(20, 81, 63, .42);
  -webkit-backdrop-filter: blur(12px) saturate(140%);
  backdrop-filter: blur(12px) saturate(140%);
}

.media--empty {
  background-image: repeating-linear-gradient(135deg, rgba(44, 230, 192, .07) 0 2px, rgba(44, 230, 192, 0) 2px 14px);
}

.media__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 16px 18px 14px;
  font-size: 12.5px;
  letter-spacing: .04em;
  line-height: 1.6;
  color: rgba(244, 237, 223, .86);
  background: linear-gradient(0deg, rgba(6, 35, 28, .94), rgba(6, 35, 28, 0));
}

.media__tag {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 2;
}

.media-grid {
  display: grid;
  gap: clamp(12px, 1.8vw, 22px);
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

/* ---------- 14. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 8vw, 112px);
  background: linear-gradient(180deg, var(--c-panel) 0%, var(--c-ink) 62%);
  border-top: 1px solid var(--c-edge);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: min(38%, 420px);
  height: 2px;
  background: linear-gradient(90deg, var(--c-cyan), rgba(44, 230, 192, 0));
}

.footer-frame {
  display: grid;
  grid-template-columns: 1.1fr 1.5fr 1fr;
  gap: clamp(24px, 4vw, 54px);
  width: 100%;
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: clamp(38px, 6vw, 70px) var(--shell-pad) clamp(26px, 4vw, 44px);
}

.footer-identity {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.footer-identity__mark {
  font-family: var(--f-display);
  font-size: 24px;
  font-weight: 900;
  letter-spacing: -.02em;
  line-height: 1.15;
}

.footer-identity__domain {
  font-family: var(--f-num);
  font-size: 12px;
  letter-spacing: .08em;
  color: rgba(44, 230, 192, .85);
}

.footer-identity__tagline {
  margin: 6px 0 0;
  font-size: 13.5px;
  color: rgba(244, 237, 223, .72);
}

.footer-meters {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 18px;
}

.footer-meters__item {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.footer-meters__num {
  font-family: var(--f-num);
  font-size: 26px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--c-cyan);
}

.footer-meters__unit {
  font-size: 11.5px;
  letter-spacing: .07em;
  color: var(--c-mist);
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px 18px;
}

.footer-col__title {
  margin: 0 0 10px;
  font-family: var(--f-num);
  font-size: 11.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--c-mist);
}

.footer-col__list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-col__link {
  display: inline-block;
  font-size: 13.5px;
  letter-spacing: .03em;
  color: rgba(244, 237, 223, .74);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.footer-col__link:hover {
  color: var(--c-cyan);
  border-bottom-color: var(--c-cyan);
}

.footer-contact__title {
  margin: 0 0 12px;
  font-family: var(--f-num);
  font-size: 11.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--c-mist);
}

.footer-contact__list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-contact__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
}

.footer-contact__row--wide { align-items: flex-start; }

.footer-contact__key {
  flex: none;
  width: 34px;
  font-size: 12px;
  letter-spacing: .08em;
  color: rgba(126, 150, 141, .9);
}

.footer-contact__val {
  font-size: 13.5px;
  color: rgba(244, 237, 223, .88);
  word-break: break-word;
}

.copy-btn {
  padding: 2px 9px;
  border-radius: var(--r-pill);
  border: 1px solid var(--c-edge);
  background: transparent;
  color: var(--c-mist);
  font-size: 11.5px;
  letter-spacing: .06em;
  cursor: pointer;
  transition: color .18s var(--ease), border-color .18s var(--ease), background-color .18s var(--ease);
}

.copy-btn:hover {
  color: var(--c-cyan);
  border-color: var(--c-cyan);
  background: rgba(44, 230, 192, .08);
}

.footer-contact__note {
  margin: 14px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: rgba(126, 150, 141, .95);
}

.footer-base {
  width: 100%;
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 18px var(--shell-pad) 30px;
  border-top: 1px solid rgba(62, 107, 94, .4);
}

.footer-base__legal {
  margin: 0;
  font-family: var(--f-num);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--c-mist);
}

/* ---------- 15. 响应式 ---------- */
@media (max-width: 1180px) {
  .header-frame {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 12px;
  }

  .header-tools { display: none; }

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

  .primary-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: none;
    flex-direction: column;
    align-items: stretch;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    padding: 16px var(--shell-pad) 26px;
    background: linear-gradient(180deg, var(--c-panel), var(--c-ink));
    border-top: 1px solid var(--c-edge);
    border-bottom: 1px solid var(--c-edge);
    box-shadow: 0 28px 54px rgba(0, 0, 0, .45);
  }

  .site-header[data-open] .primary-nav { display: flex; }

  .primary-nav__list {
    flex-direction: column;
    gap: 6px;
    padding: 0;
    border: 0;
    border-radius: 0;
    background: none;
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
  }

  .primary-nav__link {
    padding: 13px 16px;
    border-radius: 16px;
    font-size: 15.5px;
    color: var(--c-paper);
    background: rgba(20, 81, 63, .42);
  }

  .primary-nav__link[aria-current="page"] {
    color: var(--c-ink);
    background: var(--c-cyan);
  }

  .primary-nav__extra {
    display: flex;
    flex-direction: column;
    gap: 9px;
    margin-top: 18px;
  }

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

@media (max-width: 760px) {
  .status-bar__label,
  .status-bar__div,
  .status-bar__time { display: none; }

  .footer-frame {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .footer-contact { grid-column: auto; }

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

@media (max-width: 560px) {
  .brand__mark { font-size: 19px; }
  .brand__tagline { display: none; }
  .footer-nav { grid-template-columns: 1fr; }
  .footer-meters { gap: 16px; }
}

/* ---------- 16. 降低动效偏好 ---------- */
@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-reveal [data-reveal] {
    opacity: 1;
    transform: none;
  }
}