/* ============================================================
   优德赛场 — /assets/site.css
   共享层：重置 / 变量 / 中文排版 / 头部 / 页脚 / 基础组件
   ============================================================ */

/* ---------- 1. 设计变量 ---------- */
:root {
  /* 色板 */
  --night: #0B1B2B;
  --night-soft: #1D3448;
  --grass: #2F7A4F;
  --moss: #4E6B52;
  --orange: #FF6A2A;
  --warm: #FBF7EE;
  --cream: #F3EDE0;
  --rock: #2B3034;
  --line: #C9C2B4;
  --clay: #B65A3C;
  --ink-green: #143A2B;
  --mist: #DCE8DD;

  /* 派生 */
  --line-night: rgba(201, 194, 180, 0.20);
  --line-night-strong: rgba(201, 194, 180, 0.42);
  --warm-80: rgba(251, 247, 238, 0.80);
  --warm-70: rgba(251, 247, 238, 0.70);
  --warm-55: rgba(251, 247, 238, 0.55);
  --rock-60: rgba(43, 48, 52, 0.62);

  /* 字体 */
  --font-head: "Barlow Condensed", "Oswald", "Arial Narrow", "Helvetica Neue", "PingFang SC", system-ui, sans-serif;
  --font-data: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;

  /* 形状与节奏 */
  --r-lg: 32px;
  --r-md: 20px;
  --r-sm: 12px;
  --shell: 1280px;
  --pad: clamp(1.1rem, 4vw, 3.25rem);
  --ease: cubic-bezier(.22, .61, .36, 1);
  --header-h: 0px;
}

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

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

body {
  margin: 0;
  min-height: 100%;
  background-color: var(--night);
  color: var(--warm);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: .02em;
}

p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

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

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

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

dl, dd { margin: 0; }

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

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

::selection {
  background: var(--orange);
  color: var(--night);
}

/* ---------- 3. 中文排版与工具类 ---------- */
.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.shell {
  width: min(var(--shell), 100%);
  margin-inline: auto;
  padding-inline: var(--pad);
}

.section {
  padding-block: clamp(2.5rem, 6vw, 5.5rem);
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem 2rem;
  padding-bottom: 1.1rem;
  border-bottom: 1px solid var(--line-night);
  margin-bottom: clamp(1.5rem, 3vw, 2.5rem);
}

.section-title {
  font-size: clamp(1.85rem, 4.4vw, 3.2rem);
  letter-spacing: .03em;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  margin: 0 0 .7rem;
  font-family: var(--font-data);
  font-size: .7rem;
  font-weight: 500;
  letter-spacing: .22em;
  color: var(--orange);
}

.eyebrow::before {
  content: "";
  display: block;
  width: 26px;
  height: 2px;
  border-radius: 2px;
  background: var(--orange);
}

.lede {
  max-width: 62ch;
  font-size: clamp(1rem, 1.5vw, 1.12rem);
  line-height: 1.85;
  color: var(--warm-70);
}

.divider {
  height: 1px;
  border: 0;
  margin: clamp(1.5rem, 3vw, 2.5rem) 0;
  background: var(--line-night);
}

.index-num {
  font-family: var(--font-data);
  font-size: .72rem;
  letter-spacing: .18em;
  color: var(--orange);
}

/* ---------- 4. 网格 ---------- */
.blueprint-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(1rem, 2vw, 1.75rem);
}

/* ---------- 5. 按钮 ---------- */
.btn {
  --btn-bg: var(--grass);
  --btn-fg: var(--warm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  min-height: 44px;
  padding: .62rem 1.4rem;
  border: 1px solid transparent;
  border-radius: 999px;
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-family: var(--font-body);
  font-size: .93rem;
  font-weight: 600;
  letter-spacing: .03em;
  line-height: 1.2;
  text-align: center;
  transition: background-color .22s var(--ease),
              color .22s var(--ease),
              border-color .22s var(--ease),
              transform .22s var(--ease);
}

.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary { --btn-bg: var(--grass); --btn-fg: var(--warm); }
.btn-primary:hover { background: var(--moss); }

.btn-orange { --btn-bg: var(--orange); --btn-fg: var(--night); }
.btn-orange:hover { background: #E85B1E; }

.btn-ghost {
  --btn-bg: transparent;
  --btn-fg: var(--warm);
  border-color: var(--line-night-strong);
}
.btn-ghost:hover {
  background: rgba(251, 247, 238, .08);
  border-color: var(--warm);
}

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

/* ---------- 6. 标签 / 数据 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  min-height: 26px;
  padding: .1rem .7rem;
  border: 1px solid var(--line-night-strong);
  border-radius: 999px;
  background: rgba(78, 107, 82, .30);
  color: var(--warm);
  font-family: var(--font-data);
  font-size: .7rem;
  letter-spacing: .08em;
}

.tag-orange {
  background: rgba(255, 106, 42, .16);
  border-color: rgba(255, 106, 42, .58);
  color: var(--orange);
}

.data-num {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  letter-spacing: -.01em;
  color: var(--warm);
}

.data-num--hot { color: var(--orange); }

/* ---------- 7. 刻度条 ---------- */
.scale-bar {
  position: relative;
  height: 8px;
  border-radius: 999px;
  background: rgba(201, 194, 180, .18);
  overflow: hidden;
}

.scale-fill {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--grass), var(--orange));
  transform: scaleX(var(--scale, .5));
  transform-origin: left center;
  transition: transform .42s var(--ease);
}

.scale-ticks {
  display: flex;
  justify-content: space-between;
  margin-top: .5rem;
  font-family: var(--font-data);
  font-size: .68rem;
  letter-spacing: .08em;
  color: var(--warm-55);
}

.scale-tick { white-space: nowrap; }

/* ---------- 8. 卡片 ---------- */
.card {
  position: relative;
  overflow: hidden;
  padding: clamp(1.1rem, 2.4vw, 1.75rem);
  border: 1px solid var(--line-night);
  border-radius: var(--r-md);
  background: linear-gradient(180deg, rgba(29, 52, 72, .88), rgba(11, 27, 43, .94));
  color: var(--warm);
}

.card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line-night-strong), transparent);
}

.card-title {
  margin: 0 0 .5rem;
  font-size: clamp(1.12rem, 2vw, 1.5rem);
  letter-spacing: .02em;
}

.card-meta {
  margin: 0;
  font-family: var(--font-data);
  font-size: .74rem;
  letter-spacing: .12em;
  color: var(--warm-55);
}

.card-surface {
  background: var(--cream);
  border-color: rgba(43, 48, 52, .14);
  color: var(--rock);
}

.card-surface .card-title { color: var(--ink-green); }
.card-surface .card-meta { color: var(--rock-60); }

/* ---------- 9. 面板与提示 ---------- */
.panel-light {
  padding: clamp(1.5rem, 4vw, 3rem);
  border-radius: var(--r-lg);
  background: var(--warm);
  color: var(--rock);
}

.panel-light h1,
.panel-light h2,
.panel-light h3,
.panel-light .card-title { color: var(--ink-green); }

.panel-light .eyebrow { color: var(--clay); }
.panel-light .eyebrow::before { background: var(--clay); }
.panel-light .lede { color: var(--rock-60); }
.panel-light .data-num { color: var(--ink-green); }
.panel-light .data-num--hot { color: var(--clay); }

.note-block {
  padding: 1rem 1.25rem;
  border-left: 3px solid var(--clay);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  background: rgba(182, 90, 60, .12);
  color: var(--warm);
  font-size: .94rem;
  line-height: 1.8;
}

/* ---------- 10. 图片容器 ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line-night);
  border-radius: var(--r-lg);
  background:
    repeating-linear-gradient(135deg, rgba(201, 194, 180, .10) 0 1px, transparent 1px 14px),
    var(--night-soft);
}

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

.media-frame::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 42%;
  background: linear-gradient(180deg, rgba(11, 27, 43, 0), rgba(11, 27, 43, .70));
  pointer-events: none;
}

.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 4 / 5; border-radius: var(--r-md); }
.media-frame--square { aspect-ratio: 1 / 1; border-radius: var(--r-md); }

/* ---------- 11. 面包屑 ---------- */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .45rem;
  margin: 0 0 1.5rem;
  font-family: var(--font-data);
  font-size: .74rem;
  letter-spacing: .1em;
  color: var(--warm-55);
}

.crumbs li {
  display: flex;
  align-items: center;
  gap: .45rem;
}

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

.crumb-link {
  color: var(--warm);
  border-bottom: 1px solid transparent;
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

.crumb-link:hover { border-bottom-color: var(--orange); }

.crumb-current { color: var(--orange); }

/* ---------- 12. 文字链 ---------- */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding-bottom: 2px;
  border-bottom: 1px solid rgba(255, 106, 42, .42);
  color: var(--orange);
  font-weight: 600;
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

.link-arrow::after {
  content: "→";
  transition: transform .2s var(--ease);
}

.link-arrow:hover { border-bottom-color: var(--orange); }
.link-arrow:hover::after { transform: translateX(3px); }

/* ---------- 13. 显现动效 ---------- */
.js-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .42s var(--ease), transform .42s var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
}

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

/* ---------- 14. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 999;
  padding: .8rem 1.3rem;
  border-radius: 0 0 16px 0;
  background: var(--orange);
  color: var(--night);
  font-size: .9rem;
  font-weight: 700;
  letter-spacing: .04em;
  transform: translateY(-130%);
  transition: transform .2s var(--ease);
}

.skip-link:focus {
  transform: translateY(0);
  outline-offset: -4px;
}

/* ============================================================
   头部：框架式战术板
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: var(--night);
  color: var(--warm);
  border-bottom: 1px solid var(--line-night);
  isolation: isolate;
}

.header-inner {
  width: min(var(--shell), 100%);
  margin-inline: auto;
  padding-inline: var(--pad);
}

/* 顶部条：坐标 + 联赛滑轨 + 快捷入口 */
.header-strip {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  gap: 1rem;
  min-height: 46px;
  padding-block: .45rem;
  border-bottom: 1px solid var(--line-night);
}

.strip-coord {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  flex: 0 0 auto;
  margin: 0;
  font-family: var(--font-data);
  font-size: .66rem;
  letter-spacing: .16em;
  color: var(--warm-55);
  white-space: nowrap;
}

.coord-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 3px rgba(255, 106, 42, .20);
}

.league-rail {
  display: flex;
  align-items: center;
  gap: .7rem;
  flex: 1 1 auto;
  min-width: 0;
  overflow: hidden;
}

.rail-caption {
  flex: 0 0 auto;
  font-family: var(--font-data);
  font-size: .66rem;
  letter-spacing: .2em;
  color: var(--grass);
}

.rail-track {
  display: flex;
  align-items: center;
  gap: .45rem;
  min-width: 0;
  overflow-x: auto;
  padding-block: 2px;
  scrollbar-width: none;
  -ms-overflow-style: none;
  cursor: grab;
}

.rail-track::-webkit-scrollbar { display: none; }
.rail-track.is-dragging { cursor: grabbing; }

.rail-item {
  flex: 0 0 auto;
  padding: .22rem .78rem;
  border: 1px solid var(--line-night);
  border-radius: 999px;
  font-size: .78rem;
  line-height: 1.5;
  color: var(--warm-70);
  white-space: nowrap;
  transition: background-color .2s var(--ease), border-color .2s var(--ease), color .2s var(--ease);
  user-select: none;
}

.rail-item.is-active {
  background: var(--grass);
  border-color: var(--grass);
  color: var(--warm);
  font-weight: 600;
}

.strip-link {
  flex: 0 0 auto;
  padding-block: .2rem;
  border-bottom: 1px solid transparent;
  color: var(--orange);
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .04em;
  white-space: nowrap;
  transition: border-color .2s var(--ease);
}

.strip-link:hover { border-bottom-color: var(--orange); }

/* 主行：品牌 + 导航 + 行动 */
.header-main {
  position: relative;
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2.6vw, 2.5rem);
  padding-block: .9rem 1.05rem;
}

.brand {
  display: grid;
  gap: .12rem;
  flex: 0 0 auto;
  padding-right: clamp(.5rem, 1.8vw, 1.5rem);
  border-right: 1px solid var(--line-night);
}

.brand-mark {
  font-family: var(--font-data);
  font-size: .62rem;
  letter-spacing: .34em;
  color: var(--orange);
}

.brand-name {
  font-family: var(--font-head);
  font-size: clamp(1.55rem, 2.8vw, 2.1rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: .05em;
  color: var(--warm);
}

.brand-tagline {
  font-size: .74rem;
  letter-spacing: .06em;
  color: var(--warm-55);
  white-space: nowrap;
}

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

.nav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .1rem clamp(.35rem, 1.4vw, 1.05rem);
}

.nav-item { flex: 0 0 auto; }

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: .3rem .12rem;
  font-size: .9rem;
  font-weight: 500;
  letter-spacing: .02em;
  color: var(--warm-70);
  white-space: nowrap;
  transition: color .2s var(--ease);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: .12rem;
  right: .12rem;
  bottom: .55rem;
  height: 2px;
  border-radius: 2px;
  background: var(--orange);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .24s var(--ease);
}

.nav-link:hover { color: var(--warm); }
.nav-link:hover::after { transform: scaleX(1); }

.nav-link[aria-current="page"] {
  color: var(--warm);
  font-weight: 700;
}

.nav-link[aria-current="page"]::after { transform: scaleX(1); }

.nav-foot {
  display: grid;
  gap: .6rem;
  margin-top: 1rem;
}

.header-actions {
  display: none;
  flex: 0 0 auto;
  align-items: center;
  gap: .5rem;
}

/* 移动菜单按钮 */
.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  min-height: 44px;
  margin-left: auto;
  padding: .45rem .9rem;
  border: 1px solid var(--line-night-strong);
  border-radius: 999px;
  background: rgba(251, 247, 238, .05);
  color: var(--warm);
  transition: background-color .2s var(--ease), border-color .2s var(--ease);
}

.nav-toggle:hover {
  background: rgba(251, 247, 238, .12);
  border-color: var(--warm);
}

.nav-toggle-icon {
  display: grid;
  gap: 4px;
  width: 20px;
}

.nav-toggle-icon > span {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform .24s var(--ease), opacity .24s var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon > span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-icon > span:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-icon > span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.nav-toggle-text {
  font-size: .82rem;
  font-weight: 600;
  letter-spacing: .1em;
}

/* 底部刻度尺与阅读进度 */
.header-scale {
  position: relative;
  height: 3px;
  background-color: rgba(201, 194, 180, .10);
  background-image: repeating-linear-gradient(90deg, var(--line-night-strong) 0 1px, transparent 1px 40px);
}

.header-progress {
  position: absolute;
  inset: 0 auto 0 0;
  width: 0;
  background: linear-gradient(90deg, var(--grass), var(--orange));
  transition: width .14s linear;
}

/* ---------- 头部响应式 ---------- */
@media (max-width: 1119px) {
  .site-nav {
    position: absolute;
    top: calc(100% - .1rem);
    left: 0;
    right: 0;
    z-index: 5;
    padding: 1rem clamp(1rem, 4vw, 1.75rem) 1.4rem;
    border: 1px solid var(--line-night);
    border-radius: 0 0 var(--r-md) var(--r-md);
    background: var(--night);
    box-shadow: 0 28px 56px rgba(0, 0, 0, .48);
    max-height: calc(100vh - 8rem);
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity .22s var(--ease),
                transform .22s var(--ease),
                visibility .22s var(--ease);
  }

  .site-nav[data-open="true"] {
    opacity: 1;
    visibility: visible;
    transform: none;
    pointer-events: auto;
  }

  .nav-list {
    display: grid;
    gap: 0;
  }

  .nav-item { border-bottom: 1px solid var(--line-night); }

  .nav-item:last-child { border-bottom: 0; }

  .nav-link {
    display: flex;
    width: 100%;
    min-height: 52px;
    padding: .5rem .1rem;
    font-size: 1rem;
  }

  .nav-link::after { display: none; }

  .nav-link[aria-current="page"] {
    color: var(--orange);
    font-weight: 700;
  }
}

@media (min-width: 1120px) {
  .nav-toggle { display: none; }
  .nav-foot { display: none; }
  .header-actions { display: flex; }
  .site-nav { position: static; opacity: 1; visibility: visible; transform: none; }
}

@media (max-width: 900px) {
  .strip-coord { display: none; }
  .brand-tagline { display: none; }
}

@media (max-width: 640px) {
  .rail-caption { display: none; }
  .header-main { gap: .7rem; padding-block: .75rem .9rem; }
  .brand { border-right: 0; padding-right: 0; }
  .brand-mark { font-size: .58rem; letter-spacing: .26em; }
  .header-strip { gap: .6rem; }
}

/* ============================================================
   页脚：蓝图底板
   ============================================================ */
.site-footer {
  position: relative;
  margin-top: auto;
  padding-top: clamp(2rem, 5vw, 4rem);
  border-top: 1px solid var(--line-night);
  background: var(--night);
  color: var(--warm);
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(90deg, var(--line-night) 1px, transparent 1px),
    linear-gradient(180deg, var(--line-night) 1px, transparent 1px);
  background-size: 96px 96px;
  background-position: 0 0;
  pointer-events: none;
}

.footer-frame {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2rem, 4vw, 3rem);
  width: min(var(--shell), 100%);
  margin-inline: auto;
  padding-inline: var(--pad);
  padding-bottom: clamp(2rem, 4vw, 3.5rem);
}

.footer-mark {
  margin: 0 0 .45rem;
  font-family: var(--font-data);
  font-size: .64rem;
  letter-spacing: .34em;
  color: var(--orange);
}

.footer-brand-name {
  margin: 0 0 .75rem;
  font-family: var(--font-head);
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: .05em;
  color: var(--warm);
}

.footer-intro {
  max-width: 34ch;
  margin: 0 0 1.1rem;
  font-size: .92rem;
  line-height: 1.85;
  color: var(--warm-70);
}

.footer-coord {
  margin: 0;
  padding-top: .9rem;
  border-top: 1px solid var(--line-night);
  font-family: var(--font-data);
  font-size: .66rem;
  letter-spacing: .16em;
  color: var(--warm-55);
}

.footer-columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: clamp(1.4rem, 3vw, 2.4rem);
  align-content: start;
}

.footer-col { min-width: 0; }

.footer-col-title {
  display: flex;
  align-items: baseline;
  gap: .55rem;
  margin: 0 0 .9rem;
  padding-bottom: .65rem;
  border-bottom: 1px solid var(--line-night);
  font-family: var(--font-body);
  font-size: .82rem;
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--warm);
}

.footer-col-index {
  font-family: var(--font-data);
  font-size: .66rem;
  font-weight: 400;
  letter-spacing: .1em;
  color: var(--orange);
}

.footer-list {
  display: grid;
  gap: .1rem;
}

.footer-list a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: .92rem;
  color: var(--warm-70);
  transition: color .18s var(--ease);
}

.footer-list a::before {
  content: "";
  display: block;
  width: 0;
  height: 1px;
  margin-right: 0;
  background: var(--orange);
  transition: width .18s var(--ease), margin-right .18s var(--ease);
}

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

.footer-list a:hover::before {
  width: 14px;
  margin-right: .5rem;
}

.footer-contact {
  padding: clamp(1.1rem, 2vw, 1.5rem);
  border: 1px solid var(--line-night);
  border-radius: var(--r-md);
  background: rgba(29, 52, 72, .55);
}

.contact-list {
  display: grid;
  gap: .85rem;
}

.contact-row {
  display: grid;
  gap: .1rem;
}

.contact-key {
  font-family: var(--font-data);
  font-size: .64rem;
  letter-spacing: .18em;
  color: var(--orange);
}

.contact-value {
  font-size: .9rem;
  line-height: 1.65;
  color: var(--warm);
  overflow-wrap: anywhere;
}

.contact-note {
  margin: .95rem 0 0;
  padding-top: .85rem;
  border-top: 1px solid var(--line-night);
  font-size: .78rem;
  line-height: 1.75;
  color: var(--warm-55);
}

.footer-legal {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .5rem 1.5rem;
  width: min(var(--shell), 100%);
  margin-inline: auto;
  padding: 1rem var(--pad) 1.9rem;
  border-top: 1px solid var(--line-night);
  font-family: var(--font-data);
  font-size: .72rem;
  letter-spacing: .08em;
  color: var(--warm-55);
}

.footer-copy { margin: 0; }
.footer-icp { margin: 0; }

@media (min-width: 640px) {
  .footer-frame { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-contact { grid-column: 1 / -1; }
}

@media (min-width: 900px) {
  .footer-frame {
    grid-template-columns: minmax(230px, 1.05fr) minmax(0, 2.1fr) minmax(250px, 1fr);
    align-items: start;
  }
  .footer-contact { grid-column: auto; }
}

/* ============================================================
   响应式与无障碍兜底
   ============================================================ */
@media (max-width: 900px) {
  .blueprint-grid { grid-template-columns: repeat(6, minmax(0, 1fr)); }
}

@media (max-width: 560px) {
  .blueprint-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  body { font-size: 15.5px; }
  .btn { padding-inline: 1.15rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

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

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

  .btn:hover { transform: none; }
  .link-arrow:hover::after { transform: none; }
}

@media print {
  .site-header,
  .skip-link,
  .header-progress { display: none; }
  body { background: #fff; color: #000; }
  .site-footer { border-top: 1px solid #999; }
}