/* ==========================================================================
   维基彩票 · 共享站点样式
   文件路径：/assets/site.css
   设计基调：深夜走势分析室 —— 深夜墨蓝基底 + 电光青/暖琥珀双强调
   ========================================================================== */

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

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

body,
h1,
h2,
h3,
h4,
h5,
p,
figure,
blockquote,
dl,
dd { margin: 0; }

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

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

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

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

/* ---------- 2. 变量 ---------- */
:root {
  --ink-900: #0A1428;
  --ink-800: #0F1E3A;
  --ink-700: #16294B;

  --cyan: #35E0D0;
  --cyan-soft: #7FF0E6;
  --amber: #FFB347;
  --amber-deep: #E08A1E;

  --text: #F2F6FF;
  --text-dim: #9FB0C8;
  --line: #27405F;
  --glass: rgba(53, 224, 208, 0.08);

  --radius-card: 10px;
  --radius-btn: 6px;
  --radius-device: 18px;

  --header-h: 72px;
  --gutter: 24px;
  --maxw: 1280px;

  --font-head: 'Barlow Condensed', 'Oswald', 'Noto Sans SC', system-ui, sans-serif;
  --font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
  --font-num: 'JetBrains Mono', 'Roboto Mono', ui-monospace, monospace;

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

/* ---------- 3. 中文排版基底 ---------- */
html {
  font-size: 16px;
}

body {
  min-height: 100vh;
  background:
    radial-gradient(1200px 620px at 78% -12%, rgba(53, 224, 208, 0.10), transparent 62%),
    radial-gradient(900px 520px at 6% 108%, rgba(255, 179, 71, 0.07), transparent 62%),
    var(--ink-900);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection {
  background: rgba(53, 224, 208, 0.32);
  color: #FFFFFF;
}

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

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

@media (min-width: 768px) {
  :root { --gutter: 40px; }
}

@media (min-width: 1200px) {
  :root { --gutter: 64px; }
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* ---------- 5. 跳过链接 ---------- */
.skip-link {
  position: fixed;
  top: -120px;
  left: 16px;
  z-index: 300;
  padding: 10px 20px;
  border-radius: var(--radius-btn);
  background: var(--cyan);
  color: #04121F;
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.08em;
  transition: top 0.22s var(--ease);
}

.skip-link:focus {
  top: 14px;
}

/* ---------- 6. 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 120;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition:
    background-color 0.3s var(--ease),
    border-color 0.3s var(--ease),
    box-shadow 0.3s var(--ease);
}

.site-header::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(10, 20, 40, 0.78) 0%, rgba(10, 20, 40, 0) 100%);
  opacity: 1;
  transition: opacity 0.3s var(--ease);
}

.site-header.is-solid {
  background: rgba(10, 20, 40, 0.965);
  border-bottom-color: var(--line);
  box-shadow: 0 18px 44px -18px rgba(3, 8, 18, 0.9);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}

.site-header.is-solid::after {
  opacity: 0;
}

.site-header__inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.4vw, 36px);
  min-height: var(--header-h);
}

/* 品牌 */
.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  padding-block: 10px;
}

.brand-mark {
  position: relative;
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  flex: none;
}

.brand-mark__ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: radial-gradient(circle at 32% 26%, rgba(53, 224, 208, 0.36), rgba(53, 224, 208, 0) 68%);
  transition: border-color 0.25s var(--ease);
}

.brand-mark__ring::before {
  content: "";
  position: absolute;
  inset: 6px;
  border-radius: 50%;
  border: 1px dashed rgba(127, 240, 230, 0.48);
}

.brand-mark__dot {
  position: relative;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 12px rgba(53, 224, 208, 0.9);
}

.site-header__brand:hover .brand-mark__ring {
  border-color: rgba(53, 224, 208, 0.7);
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.brand-line {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-name {
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.05em;
  color: var(--text);
}

.brand-tag {
  font-size: 11px;
  line-height: 1.4;
  letter-spacing: 0.14em;
  color: var(--text-dim);
  white-space: nowrap;
}

.version-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: 1px solid rgba(255, 179, 71, 0.45);
  border-radius: 999px;
  background: rgba(255, 179, 71, 0.1);
  color: var(--amber);
  font-family: var(--font-num);
  font-size: 11px;
  line-height: 1.6;
  letter-spacing: 0.14em;
  white-space: nowrap;
}

/* 导航 */
.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 30px);
  margin-left: auto;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(2px, 0.8vw, 14px);
}

.site-nav__item {
  display: block;
}

.site-nav__link {
  position: relative;
  display: inline-block;
  padding: 9px 10px;
  border-radius: var(--radius-btn);
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.4;
  letter-spacing: 0.02em;
  white-space: nowrap;
  transition: color 0.2s var(--ease);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: 3px;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan), var(--amber));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.26s var(--ease);
}

.site-nav__link:hover,
.site-nav__link:focus-visible {
  color: var(--text);
}

.site-nav__link:hover::after,
.site-nav__link:focus-visible::after {
  transform: scaleX(1);
}

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

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

.site-nav__actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: none;
}

/* 移动端按钮 */
.nav-toggle {
  display: none;
  place-items: center;
  width: 44px;
  height: 44px;
  margin-left: auto;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-btn);
  background: rgba(22, 41, 75, 0.62);
  cursor: pointer;
  transition: border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.nav-toggle:hover {
  border-color: rgba(53, 224, 208, 0.6);
}

.nav-toggle__bars,
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--text);
  transition: transform 0.24s var(--ease), background-color 0.2s var(--ease);
}

.nav-toggle__bars {
  position: relative;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav-toggle__bars::before { top: -6px; }
.nav-toggle__bars::after  { top: 6px; }

.nav-toggle[aria-expanded="true"] .nav-toggle__bars {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before {
  background: var(--cyan);
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after {
  background: var(--cyan);
  transform: translateY(-6px) rotate(-45deg);
}

/* 滚动进度 */
.scroll-progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  z-index: 3;
  width: 0;
  height: 2px;
  pointer-events: none;
  background: linear-gradient(90deg, var(--cyan), var(--cyan-soft) 42%, var(--amber));
  box-shadow: 0 0 12px rgba(53, 224, 208, 0.6);
  transition: width 0.1s linear;
}

/* 头部移动端断点 */
@media (max-width: 1120px) {
  .nav-toggle {
    display: grid;
  }

  .site-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin: 0;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    padding: 10px var(--gutter) 28px;
    background: rgba(10, 20, 40, 0.985);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 30px 70px -20px rgba(3, 8, 18, 0.95);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-10px);
    transition:
      opacity 0.22s var(--ease),
      transform 0.22s var(--ease),
      visibility 0.22s linear;
  }

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

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .site-nav__link {
    display: block;
    padding: 14px 4px;
    border-bottom: 1px solid rgba(39, 64, 95, 0.62);
    font-family: var(--font-head);
    font-size: 17px;
    letter-spacing: 0.04em;
  }

  .site-nav__link::after {
    display: none;
  }

  .site-nav__actions {
    display: flex;
    gap: 10px;
    margin-top: 18px;
  }

  .site-nav__actions .btn {
    flex: 1;
  }
}

@media (max-width: 560px) {
  .brand-tag {
    display: none;
  }

  .brand-name {
    font-size: 18px;
  }

  .site-header__brand {
    gap: 10px;
  }
}

/* ---------- 7. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border: 1px solid transparent;
  border-radius: var(--radius-btn);
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: 0.08em;
  white-space: nowrap;
  cursor: pointer;
  transition:
    background-color 0.2s var(--ease),
    color 0.2s var(--ease),
    border-color 0.2s var(--ease),
    transform 0.2s var(--ease),
    box-shadow 0.2s var(--ease);
}

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

.btn--primary {
  background: var(--cyan);
  color: #04121F;
  box-shadow: 0 0 0 1px rgba(53, 224, 208, 0.4), 0 14px 30px -16px rgba(53, 224, 208, 0.9);
}

.btn--primary:hover {
  background: var(--cyan-soft);
}

.btn--ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--line);
}

.btn--ghost:hover {
  color: var(--cyan-soft);
  border-color: rgba(53, 224, 208, 0.7);
  background: var(--glass);
}

.btn--sm {
  padding: 8px 14px;
  font-size: 13px;
}

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

/* ---------- 8. 通用区块与排版组件 ---------- */
.section {
  padding-block: clamp(56px, 8vw, 96px);
}

.section__head {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 62ch;
  margin-bottom: clamp(24px, 4vw, 40px);
}

.section__num {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-num);
  font-size: clamp(13px, 1.6vw, 16px);
  letter-spacing: 0.24em;
  color: var(--cyan);
}

.section__num::after {
  content: "";
  width: 48px;
  height: 1px;
  background: linear-gradient(90deg, var(--line), transparent);
}

.section__title {
  font-family: var(--font-head);
  font-size: clamp(28px, 4.2vw, 40px);
  font-weight: 700;
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--text);
}

.section__desc {
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-dim);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--amber);
}

.eyebrow::before {
  content: "";
  width: 18px;
  height: 1px;
  background: var(--amber);
}

.divider {
  height: 1px;
  border: 0;
  margin-block: clamp(28px, 4vw, 48px);
  background: linear-gradient(90deg, var(--line), rgba(39, 64, 95, 0));
}

/* 面包屑 */
.breadcrumbs {
  padding-block: 18px 0;
  font-size: 13px;
}

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

.breadcrumbs__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-dim);
}

.breadcrumbs__link {
  color: var(--text-dim);
  transition: color 0.2s var(--ease);
}

.breadcrumbs__link:hover,
.breadcrumbs__link:focus-visible {
  color: var(--cyan);
}

.breadcrumbs__sep {
  color: var(--line);
}

.breadcrumbs__item--current {
  color: var(--text);
}

/* 正文 */
.prose {
  max-width: 72ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-dim);
}

.prose > * + * {
  margin-top: 1.1em;
}

.prose h2,
.prose h3 {
  font-family: var(--font-head);
  font-weight: 700;
  line-height: 1.28;
  color: var(--text);
}

.prose h2 {
  margin-top: 1.9em;
  font-size: clamp(24px, 3vw, 32px);
}

.prose h3 {
  margin-top: 1.6em;
  font-size: clamp(20px, 2.4vw, 24px);
}

.prose strong {
  color: var(--text);
  font-weight: 600;
}

.prose a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.prose ul {
  padding-left: 1.25em;
  list-style: disc;
}

.prose ol {
  padding-left: 1.25em;
  list-style: decimal;
}

.prose li + li {
  margin-top: 0.4em;
}

/* ---------- 9. 网格与卡片 ---------- */
.grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 24px);
}

.grid--2 {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.grid--3 {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.card {
  position: relative;
  padding: clamp(18px, 2.6vw, 26px);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  background: linear-gradient(180deg, var(--ink-700) 0%, var(--ink-800) 100%);
  transition: border-color 0.22s var(--ease), transform 0.22s var(--ease);
}

.card:hover {
  border-color: rgba(53, 224, 208, 0.55);
  transform: translateY(-2px);
}

.card__title {
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: 0.02em;
  color: var(--text);
}

.card__text {
  margin-top: 8px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text-dim);
}

/* 标签 */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  white-space: nowrap;
}

.tag--cyan {
  color: var(--cyan);
  border-color: rgba(53, 224, 208, 0.45);
  background: rgba(53, 224, 208, 0.08);
}

.tag--amber {
  color: var(--amber);
  border-color: rgba(255, 179, 71, 0.45);
  background: rgba(255, 179, 71, 0.1);
}

/* ---------- 10. 图片容器基础规则 ---------- */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  background:
    linear-gradient(160deg, var(--ink-700) 0%, var(--ink-900) 100%);
}

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

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

.media-frame--square {
  aspect-ratio: 1 / 1;
}

.media-frame--device {
  border-radius: var(--radius-device);
}

.media-frame__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 16px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-dim);
  background: linear-gradient(0deg, rgba(10, 20, 40, 0.94), rgba(10, 20, 40, 0));
}

/* ---------- 11. 显现动效 ---------- */
.reveal {
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

.js-anim .reveal {
  opacity: 0;
  transform: translateY(16px);
}

.js-anim .reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 12. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(64px, 8vw, 120px);
  border-top: 1px solid var(--line);
  background:
    radial-gradient(900px 420px at 8% 0%, rgba(53, 224, 208, 0.09), transparent 64%),
    radial-gradient(700px 380px at 92% 10%, rgba(255, 179, 71, 0.06), transparent 66%),
    var(--ink-800);
  color: var(--text);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan) 0%, rgba(53, 224, 208, 0) 34%, rgba(255, 179, 71, 0) 66%, var(--amber) 100%);
}

.footer-shell {
  padding-block: clamp(40px, 6vw, 72px) clamp(24px, 3vw, 36px);
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 2fr);
  gap: clamp(28px, 4vw, 64px);
  padding-bottom: clamp(28px, 4vw, 44px);
  border-bottom: 1px solid rgba(39, 64, 95, 0.72);
}

.footer-brand__name {
  font-family: var(--font-head);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0.06em;
  color: var(--text);
}

.footer-brand__desc {
  margin-top: 14px;
  max-width: 36ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-dim);
}

.footer-brand__meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.footer-brand__dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--line);
}

.footer-brand__note {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(18px, 2.6vw, 32px);
}

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

.footer-col__title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: 0.2em;
  color: var(--cyan);
}

.footer-col__title::before {
  content: "";
  width: 14px;
  height: 1px;
  background: var(--cyan);
  flex: none;
}

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

.footer-link {
  display: inline-block;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-dim);
  transition: color 0.2s var(--ease), transform 0.2s var(--ease);
}

.footer-link:hover,
.footer-link:focus-visible {
  color: var(--text);
  transform: translateX(3px);
}

.footer-contact {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: clamp(18px, 3vw, 32px);
  padding-block: clamp(24px, 3.6vw, 34px);
  border-bottom: 1px solid rgba(39, 64, 95, 0.72);
}

.footer-contact__item {
  display: flex;
  flex-direction: column;
  gap: 7px;
  min-width: 0;
}

.footer-contact__label {
  font-size: 11px;
  line-height: 1.6;
  letter-spacing: 0.2em;
  color: var(--text-dim);
}

.footer-contact__value {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--text);
  word-break: break-word;
}

.footer-contact__value--num {
  font-family: var(--font-num);
  letter-spacing: 0.06em;
}

.copy-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.footer-copy {
  padding: 4px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(53, 224, 208, 0.08);
  color: var(--cyan);
  font-size: 12px;
  line-height: 1.8;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.footer-copy:hover,
.footer-copy:focus-visible {
  border-color: var(--cyan);
  background: rgba(53, 224, 208, 0.18);
}

.copy-hint {
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.06em;
  color: var(--amber);
  opacity: 0;
  transform: translateY(3px);
  transition: opacity 0.2s var(--ease), transform 0.2s var(--ease);
}

.copy-hint[data-visible="true"] {
  opacity: 1;
  transform: none;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding-top: clamp(20px, 3vw, 28px);
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-dim);
}

.footer-bottom__legal {
  font-family: var(--font-num);
  letter-spacing: 0.04em;
}

.footer-bottom__links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.footer-bottom__link {
  font-size: 13px;
  color: var(--text-dim);
  transition: color 0.2s var(--ease);
}

.footer-bottom__link:hover,
.footer-bottom__link:focus-visible {
  color: var(--cyan);
}

@media (max-width: 900px) {
  .footer-top {
    grid-template-columns: 1fr;
  }
}

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

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 380px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- 13. 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

  .js-anim .reveal {
    opacity: 1;
    transform: none;
  }

  .card:hover,
  .footer-link:hover,
  .footer-link:focus-visible {
    transform: none;
  }

  .scroll-progress {
    transition: none;
  }
}