/* ============================================================
   万博体育主站 · 共享样式表 /assets/site.css
   夜场数据指挥中心：网格底纹、印刷描边、展签语言
   ============================================================ */

/* ---------- 1. 设计变量 ---------- */
:root {
  --abyss-900: #04141F;
  --abyss-800: #071F2E;
  --panel-700: #0C2C42;
  --grid-600: #16405A;
  --paper: #EAF6FA;
  --mist: #9DB6C4;
  --cyan: #00E5D0;
  --orange: #FF6A2B;
  --yellow: #FFD166;
  --link: #5AA9FF;
  --ink: #04141F;

  --hair: rgba(22, 64, 90, 0.85);
  --hair-soft: rgba(22, 64, 90, 0.5);
  --hair-faint: rgba(22, 64, 90, 0.18);

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

  --shell: 1280px;
  --gutter: clamp(18px, 4vw, 56px);
  --rail-h: 38px;
  --bar-h: 70px;
  --header-h: calc(var(--rail-h) + var(--bar-h));

  --speed: 0.22s;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

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

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

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--paper);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  font-weight: 400;
  background-color: var(--abyss-900);
  background-image:
    linear-gradient(90deg, var(--hair-faint) 1px, transparent 1px),
    linear-gradient(0deg, var(--hair-faint) 1px, transparent 1px);
  background-size: 120px 120px, 120px 120px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body.is-nav-open { overflow: hidden; }

h1, h2, h3, h4, h5, p, ul, ol, figure, blockquote, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; }
img { height: auto; }

a { color: var(--link); text-decoration: none; transition: color var(--speed) var(--ease); }
a:hover { color: var(--cyan); }

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

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

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

#main-content { scroll-margin-top: calc(var(--header-h) + 16px); }

/* ---------- 3. 排版基元 ---------- */
.display {
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(2rem, 4.4vw, 4.5rem);
  line-height: 0.98;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.display--thin {
  font-weight: 200;
  font-size: clamp(4rem, 10vw, 11rem);
  line-height: 0.86;
  letter-spacing: -0.04em;
}

.data-figure {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: clamp(2.2rem, 4.5vw, 3.6rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  line-height: 1.6;
  text-transform: uppercase;
  color: var(--cyan);
}

.label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  line-height: 1.6;
  color: var(--mist);
}

.lede {
  font-size: clamp(1.02rem, 1.5vw, 1.2rem);
  line-height: 1.7;
  color: rgba(234, 246, 250, 0.86);
  max-width: 46ch;
}

.prose {
  max-width: 68ch;
  line-height: 1.78;
  color: rgba(234, 246, 250, 0.92);
}
.prose p { margin-bottom: 1.2em; }
.prose p:last-child { margin-bottom: 0; }
.prose strong { color: var(--paper); font-weight: 700; }
.prose ul { list-style: none; margin-bottom: 1.2em; }
.prose li { position: relative; padding-left: 1.3em; margin-bottom: 0.5em; }
.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 1px;
  background: var(--cyan);
}

.text-link {
  color: var(--link);
  border-bottom: 1px solid rgba(90, 169, 255, 0.45);
  padding-bottom: 1px;
}
.text-link:hover { color: var(--cyan); border-bottom-color: var(--cyan); }

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

.page-body { padding-top: calc(var(--header-h) + clamp(28px, 6vw, 76px)); }

.section { padding-block: clamp(44px, 7vw, 96px); }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 20px;
  padding-bottom: 18px;
  margin-bottom: clamp(20px, 3vw, 34px);
  border-bottom: 1px solid var(--hair);
}

.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 28px);
}
.grid > * { grid-column: span 12; }

@media (min-width: 760px) {
  .col-3 { grid-column: span 3; }
  .col-4 { grid-column: span 4; }
  .col-6 { grid-column: span 6; }
  .col-8 { grid-column: span 8; }
  .col-12 { grid-column: span 12; }
}

/* ---------- 5. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1.2;
  border: 1px solid transparent;
  border-radius: 2px;
  color: var(--paper);
  text-decoration: none;
  transition: background-color var(--speed) var(--ease),
              color var(--speed) var(--ease),
              border-color var(--speed) var(--ease),
              transform var(--speed) var(--ease);
}
.btn:hover { transform: translateY(-1px); }

.btn-primary {
  background: var(--orange);
  border-color: var(--orange);
  color: #0A1520;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 9px), calc(100% - 9px) 100%, 0 100%);
}
.btn-primary:hover { background: #FF8147; border-color: #FF8147; color: #04141F; }

.btn-ghost {
  background: transparent;
  border-color: var(--grid-600);
  color: var(--paper);
}
.btn-ghost:hover { border-color: var(--cyan); color: var(--cyan); }

.btn-quiet {
  padding: 8px 0;
  background: none;
  border: 0;
  border-bottom: 1px solid var(--grid-600);
  border-radius: 0;
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
}
.btn-quiet:hover { color: var(--cyan); border-bottom-color: var(--cyan); transform: none; }

/* ---------- 6. 展签 / 面板 / 图像容器 ---------- */
.exhibit-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  background: var(--panel-700);
  border: 1px solid var(--hair);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  line-height: 1.6;
  color: var(--mist);
}
.exhibit-tag::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--cyan);
  flex: none;
}

.panel {
  position: relative;
  padding: clamp(18px, 2.4vw, 28px);
  background: linear-gradient(180deg, rgba(12, 44, 66, 0.94), rgba(7, 31, 46, 0.94));
  border: 1px solid var(--hair);
  box-shadow: 6px 6px 0 -1px rgba(22, 64, 90, 0.42);
}

.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--abyss-800);
  border: 1px solid var(--hair);
}
.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.85) contrast(1.05) brightness(0.92);
}
.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(4, 20, 31, 0) 42%, rgba(4, 20, 31, 0.78) 100%);
  pointer-events: none;
}
.media-frame--wide { aspect-ratio: 16 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--slice {
  clip-path: polygon(0 0, 100% 0, 100% 88%, 88% 100%, 0 100%);
}
.media-caption {
  display: block;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

/* ---------- 7. 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mist);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--hair-soft);
  margin-bottom: clamp(20px, 4vw, 40px);
}
.breadcrumb-link { color: var(--mist); }
.breadcrumb-link:hover { color: var(--cyan); }

/* ---------- 8. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 120;
  padding: 10px 16px;
  background: var(--cyan);
  color: var(--ink);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  border-radius: 2px;
  transform: translateY(-180%);
  transition: transform var(--speed) var(--ease);
}
.skip-link:focus { transform: translateY(0); color: var(--ink); }

/* ---------- 9. 头部 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 90;
  background: linear-gradient(180deg, rgba(4, 20, 31, 0.78), rgba(4, 20, 31, 0));
  transition: background-color var(--speed) var(--ease),
              box-shadow var(--speed) var(--ease);
}
.site-header.is-condensed,
.site-header[data-open] {
  background: rgba(4, 20, 31, 0.97);
  box-shadow: 0 1px 0 var(--hair), 0 22px 48px -34px rgba(0, 0, 0, 0.95);
}

.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: rgba(22, 64, 90, 0.7);
}
.scroll-progress-fill {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: left center;
  background: linear-gradient(90deg, var(--cyan), var(--orange));
}

.header-rail,
.header-bar {
  padding-inline: max(var(--gutter), calc((100% - 1440px) / 2));
}

.header-rail {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 28px);
  height: var(--rail-h);
  border-bottom: 1px solid var(--hair-soft);
}

.header-rail-note {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--mist);
  white-space: nowrap;
}
.rail-dot {
  width: 6px;
  height: 6px;
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(0, 229, 208, 0.16);
  flex: none;
}

.league-strip {
  display: flex;
  align-items: center;
  gap: 4px;
  overflow-x: auto;
  scrollbar-width: none;
  margin-inline-start: auto;
}
.league-strip::-webkit-scrollbar { display: none; }

.league-strip-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--mist);
  margin-inline-end: 4px;
  white-space: nowrap;
}

.league-tab {
  position: relative;
  padding: 3px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--mist);
  border: 1px solid transparent;
  white-space: nowrap;
  transition: color var(--speed) var(--ease),
              background-color var(--speed) var(--ease),
              border-color var(--speed) var(--ease);
}
.league-tab:hover { color: var(--paper); border-color: var(--hair); }
.league-tab.is-active {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
}
.league-tab.is-active:hover { color: var(--ink); }

.header-rail-link {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--mist);
  white-space: nowrap;
  border-bottom: 1px solid var(--hair);
  padding-bottom: 1px;
}
.header-rail-link:hover { color: var(--cyan); border-bottom-color: var(--cyan); }

.header-bar {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: clamp(14px, 2.2vw, 36px);
  height: var(--bar-h);
  transition: height var(--speed) var(--ease);
}
.site-header.is-condensed .header-bar { height: 58px; }

/* 品牌字标 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--paper);
}
.brand:hover { color: var(--paper); }

.brand-mark {
  position: relative;
  width: 30px;
  height: 30px;
  flex: none;
  border: 1px solid var(--cyan);
}
.brand-mark::before {
  content: "";
  position: absolute;
  inset: 6px 8px;
  border-left: 1px solid var(--cyan);
  border-right: 1px solid var(--cyan);
}
.brand-mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 8px;
  height: 8px;
  border: 1px solid var(--orange);
  transform: translate(-50%, -50%) rotate(45deg);
}

.brand-type { display: block; }
.brand-name {
  display: block;
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.15;
  color: var(--paper);
}
.brand:hover .brand-name { color: var(--cyan); }
.brand-sub {
  display: block;
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.16em;
  line-height: 1.4;
  color: var(--mist);
  white-space: nowrap;
}

/* 导航 */
.primary-nav { justify-self: end; }

.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.4vw, 24px);
}

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 8px 2px;
  font-size: 0.9rem;
  letter-spacing: 0.02em;
  color: var(--paper);
  white-space: nowrap;
  border-bottom: 1px solid transparent;
  transition: color var(--speed) var(--ease), border-color var(--speed) var(--ease);
}
.nav-link:hover { color: var(--cyan); border-bottom-color: var(--cyan); }

.nav-index {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--mist);
  transition: color var(--speed) var(--ease);
}

.nav-link[aria-current="page"] {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}
.nav-link[aria-current="page"] .nav-index { color: var(--cyan); }

.nav-extra { display: none; }
.nav-extra-note {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--mist);
}
.nav-download { align-self: flex-start; }

/* 导航开关 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border: 1px solid var(--hair);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
}
.nav-toggle:hover { border-color: var(--cyan); color: var(--cyan); }
.nav-toggle-bar {
  position: relative;
  display: block;
  width: 16px;
  height: 1px;
  background: currentColor;
}
.nav-toggle-bar::before,
.nav-toggle-bar::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 1px;
  background: currentColor;
  transition: transform var(--speed) var(--ease), opacity var(--speed) var(--ease);
}
.nav-toggle-bar::before { top: -5px; }
.nav-toggle-bar::after { top: 5px; }
.site-header[data-open] .nav-toggle-bar { background: transparent; }
.site-header[data-open] .nav-toggle-bar::before { transform: translateY(5px) rotate(45deg); }
.site-header[data-open] .nav-toggle-bar::after { transform: translateY(-5px) rotate(-45deg); }

/* 下载 CTA */
.header-cta {
  position: relative;
  justify-self: end;
  white-space: nowrap;
}
.header-cta-text { display: inline-block; }

.download-meta {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  padding: 6px 10px;
  background: var(--panel-700);
  border: 1px solid var(--grid-600);
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  line-height: 1.5;
  white-space: nowrap;
  opacity: 0;
  transform: translateY(-4px);
  pointer-events: none;
  transition: opacity var(--speed) var(--ease), transform var(--speed) var(--ease);
}
.header-cta:hover .download-meta,
.header-cta:focus-visible .download-meta {
  opacity: 1;
  transform: translateY(0);
}

/* 移动遮罩 */
.nav-scrim {
  position: fixed;
  inset: 0;
  z-index: 1;
  display: none;
  background: rgba(4, 20, 31, 0.62);
}
.site-header[data-open] .nav-scrim { display: block; }

/* ---------- 10. 头部：移动端 ---------- */
@media (max-width: 1079px) {
  .header-rail { gap: 12px; }
  .header-rail-note,
  .header-rail-link { display: none; }
  .league-strip { margin-inline-start: 0; }

  .nav-toggle { display: inline-flex; justify-self: end; }

  .primary-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(88vw, 360px);
    z-index: 3;
    display: flex;
    flex-direction: column;
    gap: 18px;
    padding: calc(var(--header-h) + 10px) var(--gutter) 40px;
    background: linear-gradient(180deg, var(--abyss-800), var(--abyss-900));
    border-left: 1px solid var(--grid-600);
    overflow-y: auto;
    transform: translateX(101%);
    visibility: hidden;
    transition: transform var(--speed) var(--ease), visibility var(--speed) var(--ease);
  }
  .site-header[data-open] .primary-nav {
    transform: translateX(0);
    visibility: visible;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }
  .nav-item { border-bottom: 1px solid var(--hair-soft); }
  .nav-link {
    padding: 14px 0;
    font-size: 1rem;
    border-bottom: 0;
  }
  .nav-link[aria-current="page"] { border-bottom: 0; }

  .nav-extra {
    display: flex;
    flex-direction: column;
    gap: 10px;
    align-items: flex-start;
  }
}

@media (max-width: 640px) {
  .header-cta { padding: 10px 13px; }
  .header-cta-text { display: none; }
  .header-cta::before {
    content: "↓";
    font-family: var(--font-mono);
    font-size: 1rem;
    line-height: 1;
  }
  .download-meta { display: none; }
  .brand-sub { display: none; }
  .nav-toggle-label { display: none; }
}

/* ---------- 11. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 9vw, 130px);
  border-top: 1px solid var(--grid-600);
  background:
    linear-gradient(180deg, rgba(7, 31, 46, 0.96), rgba(4, 20, 31, 1));
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(90deg, rgba(22, 64, 90, 0.28) 1px, transparent 1px),
    linear-gradient(0deg, rgba(22, 64, 90, 0.22) 1px, transparent 1px);
  background-size: 80px 80px, 80px 80px;
  pointer-events: none;
}

.footer-frame {
  position: relative;
  z-index: 1;
  max-width: var(--shell);
  margin-inline: auto;
  padding: clamp(40px, 6vw, 76px) var(--gutter) 26px;
}

.footer-lead {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px 48px;
  padding-bottom: clamp(26px, 4vw, 44px);
  border-bottom: 1px solid var(--hair);
}

.footer-ident {
  display: grid;
  gap: 14px;
  max-width: 520px;
}

.footer-tagline {
  font-size: clamp(1rem, 1.4vw, 1.14rem);
  line-height: 1.7;
  color: var(--paper);
}

.footer-proof {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.footer-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(24px, 3vw, 48px);
  padding-block: clamp(30px, 4vw, 52px);
}

.footer-col-title {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--mist);
  padding-bottom: 10px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--hair);
}

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

.footer-link {
  display: inline-block;
  font-size: 0.92rem;
  color: var(--paper);
  border-bottom: 1px solid transparent;
  transition: color var(--speed) var(--ease), border-color var(--speed) var(--ease);
}
.footer-link:hover { color: var(--cyan); border-bottom-color: var(--cyan); }

.footer-contact { display: grid; gap: 14px; }

.contact-row { display: grid; gap: 3px; }

.contact-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

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

.contact-value {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.6;
  letter-spacing: 0.01em;
  color: var(--paper);
  word-break: break-word;
}

.copy-btn {
  flex: none;
  padding: 2px 8px;
  border: 1px solid var(--grid-600);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--mist);
  transition: color var(--speed) var(--ease), border-color var(--speed) var(--ease),
              background-color var(--speed) var(--ease);
}
.copy-btn:hover,
.copy-btn:focus-visible { color: var(--cyan); border-color: var(--cyan); }
.copy-btn.is-copied {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink);
}

.footer-note {
  margin-top: 14px;
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--mist);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 28px;
  padding-top: clamp(18px, 3vw, 26px);
  border-top: 1px solid var(--hair);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.legal-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

.legal-link { color: var(--mist); border-bottom: 1px solid transparent; }
.legal-link:hover { color: var(--cyan); border-bottom-color: var(--cyan); }

.footer-legal-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

.footer-icp { color: var(--mist); }
.footer-copy { color: var(--mist); }

@media (max-width: 900px) {
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 560px) {
  .footer-grid { grid-template-columns: minmax(0, 1fr); }
  .footer-legal { flex-direction: column; align-items: flex-start; }
}

/* ---------- 12. 滚动增强 ---------- */
.has-js [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.24s var(--ease), transform 0.24s var(--ease);
}
.has-js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

[data-section-link] {
  transition: color var(--speed) var(--ease), border-color var(--speed) var(--ease);
}
[data-section-link][aria-current="true"] {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 13. 减少动态偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .has-js [data-reveal] {
    opacity: 1;
    transform: none;
  }
  .btn:hover { transform: none; }
}