/* ============================================================
   利来体育综合 — /assets/site.css
   共享设计系统：页头、页脚、排版、网格、组件、交互协议
   ============================================================ */

/* ---------- 0. Reset & Variables ---------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --blue-deep: #0A1A30;
  --blue-deep-2: #0E2442;
  --blue-deep-3: #16305A;
  --orange: #FF6B35;
  --gold: #D4AF37;
  --blue-bright: #3A8DFF;
  --bg-light: #F5F7FA;
  --bg-gray: #E8ECF1;
  --text-dark: #1A1A2E;
  --text-light: #FFFFFF;
  --data-green: #00C9A7;
  --warn-red: #E63946;

  --font-head: "Arial Black", "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-data: "Roboto Mono", "Courier New", ui-monospace, SFMono-Regular, Menlo, monospace;

  --max-w: 1400px;
  --header-h: 80px;
  --radius: 2px;
  --shadow: 0 2px 14px rgba(10, 26, 48, 0.08);
  --ease: cubic-bezier(.22, .8, .36, 1);
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 12px);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-dark);
  background: var(--bg-light);
}

/* ---------- 1. Base Typography ---------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-head);
  font-style: italic;
  font-weight: 900;
  line-height: 1.25;
  color: var(--text-dark);
}

p { margin-bottom: 1em; }

a {
  color: var(--blue-bright);
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

ul, ol { padding-left: 1.35em; }

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

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

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

/* ---------- 2. 无障碍 ---------- */
.skip-link {
  position: fixed;
  top: -48px;
  left: 12px;
  z-index: 9000;
  padding: 10px 18px;
  background: var(--orange);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
  border-radius: 0 0 4px 4px;
  transition: top .2s var(--ease);
}
.skip-link:focus { top: 4px; }

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

/* ---------- 3. 布局容器 ---------- */
.container {
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: 28px;
}

.section {
  position: relative;
  padding-block: 64px;
}
.section--dark {
  background: linear-gradient(125deg, var(--blue-deep) 0%, var(--blue-deep-2) 70%, var(--blue-deep-3) 100%);
  color: rgba(255,255,255,0.82);
}
.section--dark .section-title { color: #fff; }
.section--dark .section-note { color: var(--gold); }
.section--dark .section-head { border-bottom-color: rgba(255,255,255,0.14); }

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 36px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(10,26,48,0.12);
}
.section-title {
  font-size: clamp(28px, 4vw, 42px);
  letter-spacing: 0.01em;
  color: inherit;
}
.section-note {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--blue-bright);
  white-space: nowrap;
}

.grid-2, .grid-3, .grid-4 {
  display: grid;
  gap: 24px;
}
@media (min-width: 768px) {
  .grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 1100px) {
  .grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  padding: 14px 0 4px;
}
.breadcrumb a {
  color: var(--blue-bright);
  font-weight: 600;
  text-decoration: none;
}
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb [aria-current="page"] {
  color: var(--text-dark);
  font-weight: 700;
}
.breadcrumb .sep { color: #98A2B3; }

.annotation {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--blue-bright);
  white-space: nowrap;
}

/* ---------- 4. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background:
    linear-gradient(100deg, rgba(58,141,255,0.12) 0%, transparent 34%),
    linear-gradient(135deg, var(--blue-deep) 0%, var(--blue-deep-2) 68%, var(--blue-deep-3) 100%);
  color: var(--text-light);
}
.site-header::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 4px;
  background:
    linear-gradient(90deg,
      var(--orange) 0 15%,
      transparent 15% 18%,
      var(--gold) 18% 42%,
      transparent 42% 46%,
      var(--blue-bright) 46% 62%,
      transparent 62% 100%);
  pointer-events: none;
}

.header-frame {
  position: relative;
  max-width: var(--max-w);
  min-height: var(--header-h);
  margin-inline: auto;
  padding-inline: 28px;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 20px;
}

.brand-block {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: inherit;
  text-decoration: none;
}
.brand:hover { color: inherit; }

.brand-mark {
  flex: 0 0 auto;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--orange) 0%, #E84A1B 100%);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
  color: #fff;
  font-family: var(--font-head);
  font-style: italic;
  font-size: 22px;
  font-weight: 900;
}
.brand-mark::after { content: '利'; }

.brand-text {
  display: flex;
  flex-direction: column;
  justify-content: center;
  line-height: 1.18;
  font-family: var(--font-head);
  font-style: italic;
  font-size: 21px;
  font-weight: 900;
  color: #fff;
  letter-spacing: 0.03em;
}
.brand-text strong {
  font-family: var(--font-data);
  font-size: 10px;
  font-style: normal;
  font-weight: 400;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--gold);
}

.brand-sub {
  font-family: var(--font-data);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.4);
  border-left: 1px solid rgba(255,255,255,0.16);
  padding-left: 14px;
  white-space: nowrap;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 2px;
}

.nav-item {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 10px 11px;
  color: rgba(255,255,255,0.8);
  text-decoration: none;
  font-size: 15px;
  font-weight: 600;
  white-space: nowrap;
  transition: color .2s ease;
}
.nav-item .nav-index {
  font-family: var(--font-data);
  font-size: 10px;
  color: var(--gold);
  opacity: .75;
}
.nav-item::after {
  content: '';
  position: absolute;
  left: 11px;
  right: 11px;
  bottom: 4px;
  height: 2px;
  background: var(--orange);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .25s var(--ease);
}
.nav-item:hover,
.nav-item[aria-current="page"] { color: #fff; }
.nav-item:hover::after,
.nav-item[aria-current="page"]::after { transform: scaleX(1); }

.header-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
}

.header-vertical {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  height: 56px;
  padding-left: 9px;
  border-left: 1px solid rgba(255,255,255,0.16);
  font-family: var(--font-data);
  font-size: 9px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.35);
  white-space: nowrap;
}

.nav-toggle {
  display: none;
  flex: 0 0 auto;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  position: relative;
  z-index: 130;
  background: transparent;
  border: 1px solid rgba(255,255,255,0.22);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color .2s;
}
.nav-toggle:hover { border-color: var(--orange); }
.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background: #fff;
  border-radius: 1px;
  transition: transform .25s var(--ease), opacity .2s;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav-backdrop {
  position: fixed;
  inset: 0;
  z-index: 105;
  background: rgba(3, 8, 16, 0.6);
  opacity: 0;
  visibility: hidden;
  transition: opacity .3s ease, visibility .3s ease;
}
.nav-backdrop.is-visible {
  opacity: 1;
  visibility: visible;
}

body.nav-lock { overflow: hidden; }

.btn-mobile-download { display: none; }

/* ---------- 5. 页脚 ---------- */
.site-footer {
  position: relative;
  overflow: hidden;
  margin-top: 80px;
  background:
    radial-gradient(ellipse at 85% 20%, rgba(58,141,255,0.14), transparent 46%),
    linear-gradient(135deg, var(--blue-deep), var(--blue-deep-2));
  color: rgba(255,255,255,0.78);
}
.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  z-index: 2;
  background: linear-gradient(90deg,
    var(--orange) 0 12%,
    transparent 12% 16%,
    var(--gold) 16% 38%,
    transparent 38% 44%,
    var(--blue-bright) 44% 60%,
    transparent 60% 100%);
}
.footer-orbit {
  position: absolute;
  right: -140px;
  top: -180px;
  width: 460px;
  height: 460px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.06);
  z-index: 0;
}
.footer-orbit::after {
  content: '';
  position: absolute;
  inset: 52px;
  border-radius: 50%;
  border: 1px dashed rgba(255,107,53,0.16);
}
.footer-orbit::before {
  content: '';
  position: absolute;
  inset: 110px;
  border-radius: 50%;
  background: rgba(212,175,55,0.06);
}

.footer-main {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  gap: 48px;
  padding-block: 64px 44px;
}

.footer-brand .brand-text { color: #fff; }

.footer-trust {
  margin-top: 22px;
  max-width: 480px;
  padding-left: 14px;
  border-left: 2px solid var(--orange);
  font-size: 14px;
  line-height: 1.85;
  color: rgba(255,255,255,0.62);
}

.footer-contact {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
  font-size: 14px;
}
.footer-contact li {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
}
.foot-label {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
}
.footer-link {
  color: rgba(255,255,255,0.82);
  word-break: break-all;
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}
.footer-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-col-title {
  margin-bottom: 4px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255,255,255,0.12);
  font-family: var(--font-data);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
}
.footer-col a {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  padding: 2px 0;
  color: rgba(255,255,255,0.72);
  text-decoration: none;
  font-size: 14px;
  transition: color .2s;
}
.footer-col a::before {
  content: '';
  width: 0;
  height: 0;
  margin-right: 0;
  border-left: 5px solid var(--orange);
  border-top: 4px solid transparent;
  border-bottom: 4px solid transparent;
  opacity: 0;
  transition: opacity .2s, margin-right .2s;
}
.footer-col a:hover { color: #fff; }
.footer-col a:hover::before {
  opacity: 1;
  margin-right: 8px;
}

.footer-bottom {
  position: relative;
  z-index: 1;
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-block: 18px;
}
.footer-bottom-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: rgba(255,255,255,0.46);
}
.footer-icp {
  font-family: var(--font-data);
  letter-spacing: 0.08em;
}

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  line-height: 1;
  color: var(--text-dark);
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  border-radius: var(--radius);
  transition: transform .2s var(--ease), box-shadow .2s var(--ease), background-color .2s, color .2s, border-color .2s;
}
.btn:hover { transform: translateY(-2px); }

.btn-primary {
  position: relative;
  isolation: isolate;
  text-align: center;
  color: #fff;
  background: transparent;
  border-color: transparent;
}
.btn-primary::before,
.btn-primary::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
  transition: opacity .25s ease;
}
.btn-primary::before {
  background: linear-gradient(135deg, var(--orange) 0%, #E84A1B 100%);
}
.btn-primary::after {
  background: linear-gradient(135deg, var(--gold) 0%, #9C7C1E 100%);
  opacity: 0;
}
.btn-primary:hover::after { opacity: 1; }

.btn-ghost {
  background: rgba(10,26,48,0.03);
  color: var(--text-dark);
  border: 1px solid rgba(10,26,48,0.28);
  border-left: 3px solid var(--orange);
  border-radius: var(--radius);
}
.btn-ghost:hover {
  background: rgba(10,26,48,0.07);
  box-shadow: 0 4px 14px rgba(10,26,48,0.1);
}

.btn-light {
  background: #fff;
  color: var(--blue-deep);
  border-color: #fff;
}
.btn-light:hover {
  background: var(--bg-gray);
  border-color: var(--bg-gray);
}

.btn-sm {
  padding: 10px 16px;
  font-size: 13px;
}

/* ---------- 7. 面板与内容组件 ---------- */
.panel {
  position: relative;
  background: #fff;
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
}
.panel--cut {
  background: transparent;
  box-shadow: none;
  padding: 0;
}
.panel--cut::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 0;
  background: var(--panel-bg, #ffffff);
  border: 1px solid rgba(10,26,48,0.07);
  box-shadow: var(--shadow);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
}
.panel--cut > * {
  position: relative;
  z-index: 1;
}
.panel--dark {
  --panel-bg: var(--blue-deep-2);
  color: rgba(255,255,255,0.84);
}
.panel--dark.panel--cut::before {
  border-color: rgba(255,255,255,0.1);
}
.panel--dark .stat-value { color: #fff; }
.panel--dark .data-list li { border-bottom-color: rgba(255,255,255,0.12); }
.panel--dark .data-list .data-desc { color: var(--gold); }

.index-map {
  display: grid;
  gap: 14px;
}
.index-link {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 15px 18px;
  background: #fff;
  border-left: 3px solid var(--orange);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  color: var(--text-dark);
  text-decoration: none;
  font-size: 16px;
  font-weight: 700;
  transition: transform .2s var(--ease), box-shadow .2s var(--ease);
}
.index-link:hover {
  transform: translateX(5px);
  box-shadow: 0 6px 20px rgba(10,26,48,0.12);
  color: var(--text-dark);
}
.index-no {
  font-family: var(--font-data);
  font-size: 13px;
  color: var(--orange);
  letter-spacing: 0.06em;
}

.tag {
  display: inline-block;
  padding: 3px 10px;
  border-left: 2px solid currentColor;
  background: rgba(10,26,48,0.05);
  font-family: var(--font-data);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  line-height: 1.6;
  color: var(--text-dark);
}
.tag--orange { color: #D9541F; background: rgba(255,107,53,0.12); }
.tag--gold { color: #8A6D1D; background: rgba(212,175,55,0.13); }
.tag--green { color: #00997E; background: rgba(0,201,167,0.12); }
.tag--blue { color: #1767C4; background: rgba(58,141,255,0.12); }
.tag--red { color: #BF2634; background: rgba(230,57,70,0.1); }

.state-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 6px;
  border-radius: 50%;
  background: var(--data-green);
  vertical-align: middle;
  animation: state-pulse 2s infinite;
}
.state-dot--live {
  background: var(--warn-red);
  animation-name: state-pulse-red;
}
@keyframes state-pulse {
  0% { box-shadow: 0 0 0 0 rgba(0,201,167,0.4); }
  70% { box-shadow: 0 0 0 7px rgba(0,201,167,0); }
  100% { box-shadow: 0 0 0 0 rgba(0,201,167,0); }
}
@keyframes state-pulse-red {
  0% { box-shadow: 0 0 0 0 rgba(230,57,70,0.4); }
  70% { box-shadow: 0 0 0 7px rgba(230,57,70,0); }
  100% { box-shadow: 0 0 0 0 rgba(230,57,70,0); }
}

.stat {
  display: grid;
  gap: 6px;
}
.stat-value {
  font-family: var(--font-data);
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
  color: var(--blue-deep);
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}
.stat-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #6B7887;
}

.data-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.data-list li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 10px 2px;
  border-bottom: 1px solid rgba(10,26,48,0.1);
}
.data-list .data-term { font-weight: 700; }
.data-list .data-desc {
  font-family: var(--font-data);
  font-size: 14px;
  font-weight: 700;
  color: var(--blue-deep);
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.image-crop {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background:
    linear-gradient(135deg, rgba(10,26,48,0.07) 0%, transparent 48%),
    var(--bg-gray);
}
.image-crop img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .45s var(--ease);
}
.image-crop:hover img { transform: scale(1.03); }
.image-crop--dark {
  background:
    radial-gradient(circle at 24% 30%, rgba(212,175,55,0.22), transparent 42%),
    linear-gradient(135deg, var(--blue-deep), var(--blue-deep-3));
}

/* ---------- 8. 滚动与显现协议 ---------- */
[data-scroll-progress] {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--orange) 0%, var(--gold) 55%, var(--blue-bright) 100%);
  transform: scaleX(0);
  transform-origin: left top;
  pointer-events: none;
  z-index: 8000;
}

html.js-ready [data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .6s var(--ease), transform .6s var(--ease);
  transition-delay: 0ms;
}
html.js-ready [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

/* ---------- 9. 响应式 ---------- */
@media (max-width: 1199px) {
  .nav-item { padding-inline: 8px; }
  .nav-item .nav-index { display: none; }
}

@media (max-width: 1023px) {
  :root { --header-h: 64px; }

  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    z-index: 120;
    height: 100vh;
    height: 100dvh;
    width: min(320px, 84vw);
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 2px;
    padding: 92px 26px 32px;
    background: linear-gradient(160deg, var(--blue-deep-2) 0%, var(--blue-deep) 100%);
    transform: translateX(100%);
    transition: transform .3s var(--ease);
    box-shadow: none;
    overflow-y: auto;
  }
  .site-nav[data-open] {
    transform: translateX(0);
    box-shadow: -10px 0 34px rgba(0, 0, 0, 0.35);
  }
  .site-nav .nav-item {
    align-items: center;
    padding: 13px 12px;
    font-size: 16px;
    border-bottom: 1px solid rgba(255,255,255,0.07);
  }
  .site-nav .nav-item .nav-index { display: inline; }
  .site-nav .nav-item::after {
    left: 12px;
    right: auto;
    width: 26px;
  }
  .btn-mobile-download {
    display: inline-flex;
    margin-top: 26px;
  }
  .nav-toggle { display: flex; }
  .header-vertical { display: none; }
  .brand-sub { display: none; }
  .footer-main { grid-template-columns: 1fr; gap: 40px; }
  .footer-bottom-row { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 767px) {
  .container { padding-inline: 20px; }
  .header-frame { padding-inline: 20px; }
  .section { padding-block: 48px; }
  .section-head { flex-direction: column; align-items: flex-start; gap: 6px; }
  .grid-2, .grid-3, .grid-4 { gap: 18px; }
}

@media (max-width: 639px) {
  .brand-text { font-size: 18px; }
  .brand-text strong { font-size: 9px; letter-spacing: 0.22em; }
  .btn-download { display: none; }
  .footer-cols { grid-template-columns: 1fr 1fr; gap: 28px 18px; }
  .footer-main { padding-block: 48px 32px; }
}

/* ---------- 10. 弱动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .state-dot,
  .state-dot--live { animation: none; }
  html.js-ready [data-reveal],
  [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}