/* ==========================================================================
   云开赛场 · 共享外壳样式表 /assets/site.css
   深夜蓝底 · 云层白字 · 晨光金橙强调 · 框架式导航（上边界 + 左导轨）
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  background: #050A18;
}

body,
h1, h2, h3, h4, h5, h6,
p, ul, ol, li, figure, blockquote, dl, dd { margin: 0; padding: 0; }

ul, ol { list-style: none; }

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

button, input, select, textarea { font: inherit; color: inherit; }

button { background: none; border: 0; padding: 0; cursor: pointer; }

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

table { border-collapse: collapse; width: 100%; }

[hidden] { display: none !important; }

/* ---------- 2. 设计变量 ---------- */
:root {
  /* 品牌色板 */
  --ink-950: #050A18;
  --ink-900: #0C1530;
  --ink-800: #182747;
  --mist: #93A4C3;
  --cloud: #EAF0FA;
  --cloud-soft: rgba(234, 240, 250, 0.86);
  --dawn: #F4A93A;
  --arena: #E24A3F;
  --data: #5B8DF5;
  --polar: #6FD3C7;

  /* 线条与材质 */
  --line: rgba(147, 164, 195, 0.16);
  --line-strong: rgba(147, 164, 195, 0.34);
  --glow: inset 0 1px 0 rgba(234, 240, 250, 0.06);
  --shadow-lift: 0 22px 48px -34px rgba(2, 6, 16, 0.95);

  /* 字体 */
  --font-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  /* 字阶：48 / 32 / 24 / 18 / 16 / 13 */
  --step-1: 48px;
  --step-2: 32px;
  --step-3: 24px;
  --step-4: 18px;
  --step-5: 16px;
  --step-6: 13px;

  /* 框架尺寸 */
  --frame-top: 68px;
  --frame-rail: 92px;
  --gutter: 20px;
  --gutter-lg: 48px;
  --maxw: 1340px;
  --gap: 18px;
  --radius: 3px;
  --ease: cubic-bezier(0.22, 0.68, 0.24, 1);
}

/* ---------- 3. 文档底色 / 云层与光带 ---------- */
body {
  position: relative;
  min-height: 100vh;
  padding-top: var(--frame-top);
  background-color: var(--ink-950);
  color: var(--cloud);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: 0.01em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  top: -25%;
  right: -10%;
  bottom: auto;
  left: -10%;
  height: 150vh;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(90% 55% at 18% 6%, rgba(91, 141, 245, 0.20), transparent 62%),
    radial-gradient(70% 45% at 88% 2%, rgba(111, 211, 199, 0.12), transparent 66%),
    linear-gradient(198deg, rgba(244, 169, 58, 0.18) 0%, rgba(244, 169, 58, 0.05) 16%, transparent 40%),
    linear-gradient(180deg, #071027 0%, #060C1D 42%, #050A18 100%);
  animation: beam-breathe 8s ease-in-out infinite;
}

body::after {
  content: "";
  position: fixed;
  top: -18vh;
  left: -25vw;
  z-index: -1;
  width: 130vw;
  height: 60vh;
  pointer-events: none;
  transform: rotate(-8deg);
  background: linear-gradient(90deg, transparent 8%, rgba(244, 169, 58, 0.10) 45%, rgba(244, 169, 58, 0.02) 70%, transparent 92%);
  filter: blur(26px);
}

@keyframes beam-breathe {
  0%, 100% { opacity: 0.94; }
  50% { opacity: 1; }
}

/* ---------- 4. 中文排版 ---------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--cloud);
}

h1 { font-size: clamp(2rem, 5vw, 4.5rem); font-weight: 900; }
h2 { font-size: clamp(1.55rem, 3.2vw, 2.5rem); font-weight: 900; }
h3 { font-size: clamp(1.15rem, 1.9vw, 1.55rem); font-weight: 700; }
h4 { font-size: var(--step-4); font-weight: 700; }

p { font-size: var(--step-5); line-height: 1.8; }

strong, b { font-weight: 700; color: var(--cloud); }

::selection { background: rgba(244, 169, 58, 0.32); color: var(--cloud); }

.u-mono,
.num,
time,
code,
kbd {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
  letter-spacing: 0.02em;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: var(--step-6);
  letter-spacing: 0.12em;
  color: var(--mist);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--dawn);
}

.section-num {
  display: block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--dawn);
}

.lede {
  max-width: 40em;
  font-size: clamp(1.05rem, 1.5vw, 1.25rem);
  line-height: 1.8;
  color: var(--cloud-soft);
}

/* ---------- 5. 布局容器与网格 ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
}

#main-content {
  display: block;
  padding-inline: var(--gutter);
  scroll-margin-top: calc(var(--frame-top) + 16px);
}

@media (min-width: 1024px) {
  #main-content { padding-inline: var(--gutter-lg); }
}

.section {
  position: relative;
  padding-block: clamp(38px, 7vh, 84px);
}

.section__head {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 720px;
  margin-bottom: 28px;
}

.grid-12 { display: grid; gap: var(--gap); }

@media (min-width: 880px) {
  .grid-12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }
  .col-span-3 { grid-column: span 3; }
  .col-span-4 { grid-column: span 4; }
  .col-span-5 { grid-column: span 5; }
  .col-span-6 { grid-column: span 6; }
  .col-span-7 { grid-column: span 7; }
  .col-span-8 { grid-column: span 8; }
  .col-span-12 { grid-column: span 12; }
}

.slant-divider {
  height: 1px;
  border: 0;
  margin-block: clamp(26px, 5vh, 58px);
  transform: rotate(-1.1deg);
  background: linear-gradient(90deg, transparent, var(--line-strong), transparent);
}

/* ---------- 6. 正文容器 ---------- */
.prose { max-width: 720px; }

.prose > * + * { margin-top: 1.05em; }

.prose p,
.prose li { color: var(--cloud-soft); }

.prose h2 { margin-top: 1.8em; }
.prose h3 { margin-top: 1.5em; }

.prose ul { display: grid; gap: 10px; }

.prose ul li {
  position: relative;
  padding-left: 20px;
}

.prose ul li::before {
  content: "";
  position: absolute;
  top: 0.72em;
  left: 0;
  width: 10px;
  height: 1px;
  background: var(--dawn);
}

.prose a {
  color: var(--data);
  border-bottom: 1px solid rgba(91, 141, 245, 0.4);
}

.prose a:hover {
  color: var(--cloud);
  border-bottom-color: var(--dawn);
}

/* ---------- 7. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 0.06em;
  transition: transform 0.22s var(--ease), background-color 0.22s var(--ease),
    border-color 0.22s var(--ease), color 0.22s var(--ease);
}

.btn--primary {
  background: linear-gradient(135deg, var(--dawn), #F7C066);
  color: #22160A;
  box-shadow: 0 18px 34px -22px rgba(244, 169, 58, 0.9);
}

.btn--primary:hover { transform: translateY(-2px); }

.btn--ghost {
  background: rgba(12, 21, 48, 0.55);
  border-color: var(--line-strong);
  color: var(--cloud);
}

.btn--ghost:hover {
  border-color: var(--dawn);
  color: var(--dawn);
}

.btn--sm {
  padding: 9px 16px;
  font-size: var(--step-6);
  letter-spacing: 0.08em;
}

/* ---------- 8. 面包屑 ---------- */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 22px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

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

.breadcrumbs li + li::before {
  content: "/";
  color: var(--line-strong);
}

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

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

/* ---------- 9. 面板 / 数据卡 / 标签 ---------- */
.panel {
  position: relative;
  padding: clamp(18px, 2.4vw, 28px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(12, 21, 48, 0.88), rgba(7, 12, 28, 0.92));
  box-shadow: var(--glow);
}

.panel--float {
  box-shadow: var(--shadow-lift), var(--glow);
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease);
}

.panel--float:hover {
  transform: translateY(-2px);
  border-color: var(--line-strong);
}

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

.stat__value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--cloud);
}

.stat__value--dawn { color: var(--dawn); }

.stat__label {
  font-size: var(--step-6);
  letter-spacing: 0.08em;
  color: var(--mist);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.tag--alert {
  border-color: rgba(226, 74, 63, 0.6);
  color: #F0A49D;
  font-weight: 700;
}

.tag--live {
  border-color: rgba(244, 169, 58, 0.55);
  color: var(--dawn);
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: rgba(12, 21, 48, 0.6);
  font-size: var(--step-6);
  letter-spacing: 0.06em;
  color: var(--mist);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

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

.chip[aria-selected="true"],
.chip.is-active {
  color: var(--dawn);
  border-color: var(--dawn);
  background: rgba(244, 169, 58, 0.10);
}

/* ---------- 10. 图片容器（页面阶段放置占位） ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(24, 39, 71, 0.9), rgba(5, 10, 24, 0.95));
}

.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(200deg, rgba(244, 169, 58, 0.10), transparent 45%);
}

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

.media-frame__caption {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  padding: 10px 14px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
  background: linear-gradient(180deg, transparent, rgba(5, 10, 24, 0.85));
}

/* ---------- 11. 跳至主要内容 ---------- */
.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 200;
  padding: 10px 16px;
  border-radius: 2px;
  background: var(--dawn);
  color: #22160A;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.06em;
  transform: translateY(-180%);
  transition: transform 0.2s var(--ease);
}

.skip-link:focus { transform: translateY(0); }

/* ---------- 12. 头部框架 ---------- */
.site-header { position: relative; z-index: 120; }

.frame-top {
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  z-index: 120;
  height: var(--frame-top);
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(6, 12, 28, 0.97), rgba(6, 12, 28, 0.86));
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(234, 240, 250, 0.03), 0 24px 42px -36px rgba(0, 0, 0, 0.95);
}

.frame-top__inner {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding-inline: var(--gutter);
}

@media (min-width: 1024px) {
  .frame-top__inner {
    padding-left: calc(var(--frame-rail) + var(--gutter-lg));
    padding-right: var(--gutter-lg);
    gap: 20px;
  }
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  padding: 6px 0;
}

.brand__mark {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 38px;
  height: 38px;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  background: linear-gradient(140deg, rgba(244, 169, 58, 0.16), rgba(24, 39, 71, 0.6));
  box-shadow: var(--glow);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--dawn);
}

.brand__text {
  display: flex;
  flex-direction: column;
  min-width: 0;
  line-height: 1.25;
}

.brand__name {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 900;
  letter-spacing: 0.06em;
  color: var(--cloud);
}

.brand__line {
  display: none;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mist);
  white-space: nowrap;
}

@media (min-width: 768px) {
  .brand__line { display: block; }
}

.frame-utils {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
}

.refresh {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(12, 21, 48, 0.7);
  font-size: var(--step-6);
  color: var(--mist);
  white-space: nowrap;
}

.refresh__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--dawn);
  animation: refresh-pulse 3s ease-out infinite;
}

@keyframes refresh-pulse {
  0% { box-shadow: 0 0 0 0 rgba(244, 169, 58, 0.45); }
  70% { box-shadow: 0 0 0 7px rgba(244, 169, 58, 0); }
  100% { box-shadow: 0 0 0 0 rgba(244, 169, 58, 0); }
}

.refresh__label { display: none; }

@media (min-width: 768px) {
  .refresh__label { display: inline; }
}

.refresh__time {
  font-size: var(--step-6);
  color: var(--cloud);
}

.chip-link {
  display: none;
  align-items: center;
  padding: 7px 14px;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: linear-gradient(180deg, rgba(24, 39, 71, 0.55), rgba(12, 21, 48, 0.4));
  font-size: var(--step-6);
  letter-spacing: 0.08em;
  color: var(--cloud);
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.chip-link:hover {
  border-color: var(--dawn);
  color: var(--dawn);
}

@media (min-width: 1024px) {
  .chip-link { display: inline-flex; }
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  background: rgba(12, 21, 48, 0.6);
  font-size: var(--step-6);
  letter-spacing: 0.1em;
  color: var(--cloud);
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

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

.nav-toggle__bars {
  position: relative;
  width: 16px;
  height: 10px;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  right: 0;
  left: 0;
  height: 1.5px;
  background: currentColor;
  transition: transform 0.25s var(--ease);
}

.nav-toggle__bars::before { top: 0; }
.nav-toggle__bars::after { bottom: 0; }

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(4.25px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { transform: translateY(-4.25px) rotate(-45deg); }

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

@media (min-width: 1024px) {
  .nav-toggle { display: none; }
}

/* ---------- 13. 主导航（移动抽屉 → 桌面左导轨） ---------- */
.site-nav {
  position: fixed;
  top: var(--frame-top);
  right: 0;
  left: 0;
  z-index: 110;
  max-height: calc(100vh - var(--frame-top));
  max-height: calc(100dvh - var(--frame-top));
  overflow-y: auto;
  padding: 8px 0 18px;
  border-bottom: 1px solid var(--line-strong);
  background: linear-gradient(180deg, rgba(6, 12, 28, 0.99), rgba(5, 10, 24, 0.98));
  box-shadow: 0 34px 52px -32px rgba(0, 0, 0, 0.95);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: opacity 0.26s var(--ease), transform 0.26s var(--ease), visibility 0.26s linear;
}

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

.site-nav__list {
  display: flex;
  flex-direction: column;
}

.site-nav__item { border-bottom: 1px solid var(--line); }

.site-nav__link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 15px var(--gutter);
  font-size: var(--step-5);
  letter-spacing: 0.06em;
  color: var(--cloud);
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease);
}

.site-nav__link:hover {
  background: rgba(24, 39, 71, 0.5);
  color: var(--dawn);
}

.site-nav__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.site-nav__link[aria-current="page"] {
  color: var(--dawn);
  background: linear-gradient(90deg, rgba(244, 169, 58, 0.12), transparent 70%);
  box-shadow: inset 3px 0 0 var(--dawn);
}

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

.site-nav__foot { display: none; }

@media (min-width: 1024px) {
  .site-nav {
    top: var(--frame-top);
    right: auto;
    bottom: 0;
    left: 0;
    width: var(--frame-rail);
    max-height: none;
    padding: 18px 0 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    overflow-y: auto;
    border-right: 1px solid var(--line);
    border-bottom: 0;
    background: linear-gradient(180deg, rgba(12, 21, 48, 0.78) 0%, rgba(6, 12, 28, 0.86) 55%, rgba(5, 10, 24, 0.5) 100%);
    box-shadow: none;
    opacity: 1;
    visibility: visible;
    transform: none;
    transition: none;
  }

  .site-nav__list {
    flex: 1 1 auto;
    align-items: center;
    justify-content: center;
    gap: 4px;
    width: 100%;
  }

  .site-nav__item {
    width: 100%;
    border-bottom: 0;
  }

  .site-nav__link {
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 10px 6px;
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.14em;
    background: none;
  }

  .site-nav__link:hover { background: none; }

  .site-nav__label {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    line-height: 1.15;
    letter-spacing: 0.14em;
  }

  .site-nav__num { font-size: 11px; letter-spacing: 0.06em; }

  .site-nav__link[aria-current="page"] {
    background: none;
    box-shadow: none;
    color: var(--dawn);
  }

  .site-nav__link[aria-current="page"]::before {
    content: "";
    position: absolute;
    top: 50%;
    left: 0;
    width: 2px;
    height: 22px;
    transform: translateY(-50%);
    background: var(--dawn);
  }

  .site-nav__foot {
    display: block;
    margin-top: 12px;
    font-size: 11px;
    letter-spacing: 0.2em;
    color: var(--mist);
    writing-mode: vertical-rl;
  }
}

/* ---------- 14. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 9vh, 110px);
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(12, 21, 48, 0.92), rgba(5, 10, 24, 0.98) 70%);
}

.site-footer__beam {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 160px;
  overflow: hidden;
  pointer-events: none;
}

.site-footer__beam::before {
  content: "";
  position: absolute;
  top: -70px;
  right: -20%;
  left: -20%;
  height: 230px;
  transform: rotate(-4deg);
  background: linear-gradient(90deg, transparent 12%, rgba(244, 169, 58, 0.14) 50%, transparent 88%);
  filter: blur(12px);
}

.site-footer__inner {
  position: relative;
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding: clamp(36px, 6vh, 64px) var(--gutter) 30px;
}

@media (min-width: 1024px) {
  .site-footer__inner { padding-inline: var(--gutter-lg); }
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 34px);
}

@media (min-width: 620px) {
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 1024px) {
  .footer-grid {
    grid-template-columns: minmax(0, 3.6fr) repeat(4, minmax(0, 1.6fr));
    gap: 28px;
  }
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
  max-width: 36ch;
}

.footer-brand__name {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 900;
  letter-spacing: 0.06em;
  color: var(--cloud);
}

.footer-brand__name::after {
  content: "";
  display: block;
  width: 34px;
  height: 2px;
  margin-top: 12px;
  background: linear-gradient(90deg, var(--dawn), transparent);
}

.footer-brand__line {
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

.footer-col__title {
  margin-bottom: 14px;
  font-family: var(--font-body);
  font-size: var(--step-6);
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--cloud);
}

.footer-list { display: grid; gap: 10px; }

.footer-list a {
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--mist);
  transition: color 0.2s var(--ease);
}

.footer-list a:hover { color: var(--dawn); }

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px 26px;
  margin-top: clamp(30px, 5vh, 52px);
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-size: var(--step-6);
  color: var(--mist);
}

.footer-contact {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: var(--step-6);
  color: var(--mist);
}

.footer-contact__item--mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--cloud-soft);
}

.footer-contact__sep { color: var(--line-strong); }

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

/* ---------- 15. 动效钩子 ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 200;
  width: 0;
  height: 2px;
  pointer-events: none;
  background: linear-gradient(90deg, var(--data), var(--dawn));
  transition: width 0.12s linear;
}

.js [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.32s var(--ease), transform 0.32s var(--ease);
}

.js [data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 16. 焦点态 ---------- */
:focus-visible {
  outline: 2px solid var(--dawn);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ---------- 17. 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;
  }

  body::before { animation: none; }

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