/* =========================================================
   完美体育看台 — /assets/site.css
   草原夜空深蓝 · 赛事荧光绿 · 速度橙 · 看台水泥灰
   ========================================================= */

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

html {
  background: #0B132B;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: transparent;
  color: #F4F7FF;
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 夜场颗粒 + 扫描线 + 三处光晕 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(110% 70% at 3% -10%, rgba(56, 225, 214, 0.10), transparent 58%),
    radial-gradient(85% 60% at 104% 6%, rgba(255, 122, 26, 0.09), transparent 54%),
    radial-gradient(95% 70% at 46% 116%, rgba(182, 255, 59, 0.06), transparent 62%),
    repeating-linear-gradient(0deg, rgba(244, 247, 255, 0.018) 0 1px, transparent 1px 4px);
}

h1, h2, h3, h4, h5, p, figure, blockquote, dl, dd { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }

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

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

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

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

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

[hidden] { display: none !important; }

/* ---------- 2. Tokens ---------- */
:root {
  --night: #0B132B;
  --stand: #111E42;
  --screen: #182B57;
  --concrete: #8792A6;
  --chalk: #F4F7FF;
  --muted: #B9C3D6;
  --lime: #B6FF3B;
  --orange: #FF7A1A;
  --cyan: #38E1D6;
  --hint: #FFD166;

  --glow: linear-gradient(135deg, #B6FF3B 0%, #38E1D6 45%, #FF7A1A 100%);
  --slit: linear-gradient(90deg, transparent 0%, #B6FF3B 20%, #38E1D6 50%, #FF7A1A 80%, transparent 100%);

  --cut-lg: 22px;
  --cut-sm: 14px;
  --cut-xs: 10px;

  --wrap: 1200px;
  --gutter: clamp(16px, 4vw, 48px);

  --font-display: "Arial Narrow", "DIN Condensed", "Noto Sans SC", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-num: "Roboto Mono", "IBM Plex Mono", ui-monospace, "Courier New", monospace;

  --line: rgba(135, 146, 166, 0.22);
  --line-soft: rgba(135, 146, 166, 0.14);
}

/* ---------- 3. 排版 ---------- */
.display {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(26px, 3.4vw, 40px);
  line-height: 1.08;
  letter-spacing: 0.01em;
  color: var(--chalk);
}

.display--lg {
  font-size: clamp(30px, 4.4vw, 52px);
  line-height: 1.04;
  letter-spacing: 0.005em;
}

.display--xl {
  font-size: clamp(36px, 6.2vw, 72px);
  line-height: 0.98;
  letter-spacing: -0.005em;
}

.lede {
  font-size: clamp(16px, 1.35vw, 18px);
  line-height: 1.78;
  color: var(--muted);
  max-width: 60ch;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.30em;
  text-transform: uppercase;
  color: var(--cyan);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--cyan);
  flex: none;
}

.num {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
}

.margin-note {
  writing-mode: vertical-rl;
  font-size: 12px;
  letter-spacing: 0.34em;
  color: var(--concrete);
  text-transform: uppercase;
  line-height: 1;
}

.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;
}

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

.section {
  padding-block: clamp(44px, 6.5vw, 96px);
}

.grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 28px);
}

.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(4, minmax(0, 1fr)); }

.split {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
}

.slant-rule {
  position: relative;
  height: 1px;
  margin-block: clamp(30px, 5vw, 62px);
  background: var(--line-soft);
}

.slant-rule::after {
  content: "";
  position: absolute;
  left: 0;
  top: -1px;
  width: min(180px, 32%);
  height: 3px;
  background: var(--glow);
}

/* ---------- 5. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 26px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.10em;
  line-height: 1.2;
  white-space: nowrap;
  clip-path: polygon(0 0, calc(100% - var(--cut-sm)) 0, 100% var(--cut-sm), 100% 100%, var(--cut-sm) 100%, 0 calc(100% - var(--cut-sm)));
  transition: transform 0.22s ease, filter 0.22s ease, background-color 0.22s ease, color 0.22s ease, border-color 0.22s ease;
}

.btn--primary {
  background: var(--glow);
  color: var(--night);
  box-shadow: 0 0 26px rgba(182, 255, 59, 0.22);
}

.btn--primary:hover {
  filter: brightness(1.10);
  transform: translateY(-2px);
}

.btn--ghost {
  color: var(--chalk);
  background: rgba(24, 43, 87, 0.55);
  box-shadow: inset 0 0 0 1px rgba(135, 146, 166, 0.42);
}

.btn--ghost:hover {
  color: var(--lime);
  box-shadow: inset 0 0 0 1px rgba(182, 255, 59, 0.75);
  transform: translateY(-2px);
}

.btn:focus-visible {
  outline: 2px solid var(--chalk);
  outline-offset: -6px;
}

/* ---------- 6. 面板 / 标签 ---------- */
.panel {
  position: relative;
  background: linear-gradient(155deg, rgba(24, 43, 87, 0.92) 0%, rgba(17, 30, 66, 0.78) 100%);
  box-shadow: inset 0 0 0 1px var(--line);
}

.panel--cut {
  clip-path: polygon(
    0 0,
    calc(100% - var(--cut-lg)) 0,
    100% var(--cut-lg),
    100% 100%,
    var(--cut-lg) 100%,
    0 calc(100% - var(--cut-lg))
  );
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 11px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  line-height: 1.6;
  color: var(--muted);
  box-shadow: inset 0 0 0 1px rgba(135, 146, 166, 0.38);
}

.tag--beta {
  color: var(--hint);
  background: rgba(255, 209, 102, 0.10);
  box-shadow: inset 0 0 0 1px rgba(255, 209, 102, 0.55);
}

.tag--live {
  color: var(--night);
  background: var(--lime);
  box-shadow: none;
}

/* ---------- 7. 面包屑 ---------- */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.crumbs__link {
  color: var(--muted);
  transition: color 0.2s ease;
}

.crumbs__link:hover { color: var(--lime); }

.crumbs__sep {
  color: var(--concrete);
  opacity: 0.6;
  font-family: var(--font-num);
}

.crumbs__current { color: var(--chalk); }

/* ---------- 8. 图片容器基础 ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  color: var(--muted);
  background:
    repeating-linear-gradient(115deg, rgba(56, 225, 214, 0.09) 0 1px, transparent 1px 12px),
    linear-gradient(158deg, #1B3160 0%, #111E42 54%, #0B132B 100%);
  clip-path: polygon(0 0, calc(100% - var(--cut-sm)) 0, 100% var(--cut-sm), 100% 100%, 0 100%);
}

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

.media--wide { aspect-ratio: 21 / 9; }
.media--tall { aspect-ratio: 4 / 5; }
.media--square { aspect-ratio: 1 / 1; }

.media__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  max-width: 88%;
  padding: 7px 16px 7px 12px;
  font-size: 11px;
  letter-spacing: 0.18em;
  line-height: 1.6;
  color: var(--muted);
  background: rgba(11, 19, 43, 0.84);
  border-left: 2px solid var(--lime);
}

/* ---------- 9. 筛选按钮 ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.filter-btn {
  padding: 8px 16px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--muted);
  background: rgba(24, 43, 87, 0.45);
  box-shadow: inset 0 0 0 1px rgba(135, 146, 166, 0.34);
  clip-path: polygon(0 0, calc(100% - var(--cut-xs)) 0, 100% var(--cut-xs), 100% 100%, var(--cut-xs) 100%, 0 calc(100% - var(--cut-xs)));
  transition: color 0.2s ease, background-color 0.2s ease, box-shadow 0.2s ease;
}

.filter-btn:hover {
  color: var(--chalk);
  box-shadow: inset 0 0 0 1px rgba(182, 255, 59, 0.62);
}

.filter-btn[aria-pressed="true"] {
  color: var(--night);
  background: var(--lime);
  box-shadow: 0 0 20px rgba(182, 255, 59, 0.34);
}

.filter-btn:focus-visible {
  outline: 2px solid var(--chalk);
  outline-offset: -5px;
}

/* ---------- 10. 显现 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.55s ease, transform 0.55s cubic-bezier(0.2, 0.7, 0.3, 1);
}

.reveal.is-revealed {
  opacity: 1;
  transform: none;
}

/* =========================================================
   页头
   ========================================================= */
.skip-link {
  position: absolute;
  left: 16px;
  top: -80px;
  z-index: 120;
  padding: 10px 20px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--night);
  background: var(--lime);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 12px 100%, 0 calc(100% - 12px));
  transition: top 0.22s ease;
}

.skip-link:focus {
  top: 10px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: linear-gradient(180deg, rgba(11, 19, 43, 0.97) 0%, rgba(11, 19, 43, 0.90) 100%);
  border-bottom: 1px solid var(--line);
  -webkit-backdrop-filter: blur(12px) saturate(120%);
  backdrop-filter: blur(12px) saturate(120%);
}

/* 上层横栏：品牌短句 + 辅助动作（含斜向光带） */
.site-header__top {
  position: relative;
  border-bottom: 1px solid var(--line-soft);
  background:
    linear-gradient(105deg, transparent 0 60%, rgba(56, 225, 214, 0.10) 60% 76%, transparent 76% 100%),
    linear-gradient(100deg, rgba(24, 43, 87, 0.95) 0%, rgba(17, 30, 66, 0.72) 52%, rgba(11, 19, 43, 0.40) 100%);
  transition: opacity 0.3s ease;
}

.site-header__top-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
  min-height: 58px;
  transition: min-height 0.3s ease;
}

.site-header.is-condensed .site-header__top-inner {
  min-height: 44px;
}

.site-header.is-condensed .brand__line {
  opacity: 0.6;
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: none;
}

.brand__mark {
  flex: none;
  width: 26px;
  height: 26px;
  background: var(--glow);
  clip-path: polygon(0 0, 100% 0, 100% 66%, 66% 100%, 0 100%);
  box-shadow: 0 0 20px rgba(182, 255, 59, 0.42);
  transition: transform 0.3s ease;
}

.brand:hover .brand__mark {
  transform: rotate(-8deg);
}

.brand__text {
  display: block;
  min-width: 0;
}

.brand__name {
  display: block;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1.15;
  color: var(--chalk);
}

.brand__line {
  display: block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.30em;
  line-height: 1.6;
  color: var(--lime);
  transition: opacity 0.3s ease;
}

/* 辅助导航 + 收藏 */
.header-aux {
  display: flex;
  align-items: center;
  gap: 20px;
  min-width: 0;
}

.header-aux__list {
  display: flex;
  align-items: center;
  gap: 20px;
}

.header-aux__item {
  display: flex;
}

.header-aux__link {
  position: relative;
  display: inline-block;
  padding: 4px 0;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted);
  transition: color 0.22s ease;
}

.header-aux__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.26s ease;
}

.header-aux__link:hover { color: var(--chalk); }
.header-aux__link:hover::after { transform: scaleX(1); }

.collect-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex: none;
  padding: 7px 15px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.10em;
  line-height: 1.4;
  color: var(--lime);
  background: rgba(182, 255, 59, 0.07);
  box-shadow: inset 0 0 0 1px rgba(182, 255, 59, 0.35);
  clip-path: polygon(0 0, calc(100% - var(--cut-xs)) 0, 100% var(--cut-xs), 100% 100%, var(--cut-xs) 100%, 0 calc(100% - var(--cut-xs)));
  transition: background-color 0.24s ease, color 0.24s ease, box-shadow 0.24s ease;
}

.collect-toggle:hover {
  background: rgba(182, 255, 59, 0.16);
}

.collect-toggle__dot {
  width: 7px;
  height: 7px;
  flex: none;
  background: currentColor;
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
}

.collect-toggle[aria-pressed="true"] {
  color: var(--night);
  background: var(--lime);
  box-shadow: 0 0 22px rgba(182, 255, 59, 0.42);
}

.collect-toggle:focus-visible {
  outline: 2px solid var(--chalk);
  outline-offset: -5px;
}

/* 下层横栏：主导航 */
.site-header__main {
  position: relative;
}

.site-header__main-inner {
  display: flex;
  align-items: center;
  gap: 18px;
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
  min-height: 60px;
}

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

.site-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.2vw, 34px);
}

.site-nav__item {
  display: flex;
}

.site-nav__link {
  position: relative;
  display: inline-block;
  padding: 20px 2px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.13em;
  line-height: 1;
  white-space: nowrap;
  color: var(--muted);
  transition: color 0.22s ease;
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 13px;
  height: 2px;
  background: var(--glow);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.28s cubic-bezier(0.2, 0.7, 0.3, 1);
}

.site-nav__link:hover { color: var(--chalk); }
.site-nav__link:hover::after { transform: scaleX(1); }

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

.site-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--lime);
  box-shadow: 0 0 12px rgba(182, 255, 59, 0.72);
}

.site-nav__link:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

.header-cta {
  flex: none;
  display: inline-flex;
  align-items: center;
  padding: 10px 20px;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.16em;
  line-height: 1.2;
  white-space: nowrap;
  color: var(--night);
  background: var(--glow);
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
  transition: filter 0.24s ease, transform 0.24s ease;
}

.header-cta:hover {
  filter: brightness(1.12);
  transform: translateY(-1px);
}

.header-cta:focus-visible {
  outline: 2px solid var(--chalk);
  outline-offset: -6px;
}

/* 移动按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  flex: none;
  padding: 9px 15px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.20em;
  line-height: 1.4;
  color: var(--chalk);
  box-shadow: inset 0 0 0 1px rgba(135, 146, 166, 0.34);
  clip-path: polygon(0 0, calc(100% - var(--cut-xs)) 0, 100% var(--cut-xs), 100% 100%, var(--cut-xs) 100%, 0 calc(100% - var(--cut-xs)));
  transition: color 0.22s ease, box-shadow 0.22s ease;
}

.nav-toggle:hover {
  color: var(--lime);
  box-shadow: inset 0 0 0 1px rgba(182, 255, 59, 0.70);
}

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  gap: 3px;
  width: 16px;
}

.nav-toggle__bars span {
  display: block;
  height: 2px;
  background: currentColor;
  transition: transform 0.26s ease, opacity 0.26s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

.nav-toggle:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

/* =========================================================
   页脚
   ========================================================= */
.site-footer {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  margin-top: clamp(56px, 8vw, 112px);
  background: linear-gradient(180deg, rgba(17, 30, 66, 0.96) 0%, rgba(11, 19, 43, 1) 62%);
  border-top: 1px solid var(--line);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--slit);
  opacity: 0.9;
  pointer-events: none;
}

.site-footer__glow {
  position: absolute;
  right: -14%;
  top: -34%;
  width: 58%;
  height: 380px;
  pointer-events: none;
  z-index: -1;
  background: radial-gradient(closest-side, rgba(56, 225, 214, 0.16), transparent 72%);
}

.footer-body {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr) minmax(0, 1.15fr);
  gap: clamp(28px, 4.5vw, 60px);
  padding-block: clamp(40px, 6vw, 74px);
}

.footer-brand__link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.footer-brand__mark {
  width: 24px;
  height: 24px;
  flex: none;
  background: var(--glow);
  clip-path: polygon(0 0, 100% 0, 100% 64%, 64% 100%, 0 100%);
  box-shadow: 0 0 18px rgba(182, 255, 59, 0.38);
}

.footer-brand__name {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.07em;
  color: var(--chalk);
}

.footer-intro {
  margin-top: 16px;
  max-width: 34ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

.footer-hint {
  margin-top: 18px;
  max-width: 40ch;
  padding: 10px 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--lime);
  background: rgba(182, 255, 59, 0.07);
  border-left: 2px solid var(--lime);
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

.footer-hint[data-collected="true"] {
  color: var(--night);
  background: var(--lime);
  border-left-color: var(--cyan);
}

.footer-cta {
  margin-top: 22px;
  font-size: 14px;
  padding: 11px 22px;
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 36px);
  align-content: start;
}

.footer-col__title {
  margin-bottom: 14px;
  padding-bottom: 10px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.28em;
  line-height: 1.6;
  color: var(--cyan);
  border-bottom: 1px solid var(--line-soft);
}

.footer-col__list {
  display: flex;
  flex-direction: column;
}

.footer-col__link {
  display: inline-block;
  padding: 6px 0;
  font-size: 14px;
  color: var(--muted);
  transition: color 0.2s ease, transform 0.2s ease;
}

.footer-col__link:hover {
  color: var(--lime);
  transform: translateX(4px);
}

.footer-col__link:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

.footer-contact__list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.footer-contact__item {
  display: flex;
  gap: 12px;
  padding: 6px 0;
  font-size: 13px;
  line-height: 1.7;
}

.footer-contact__label {
  flex: none;
  width: 64px;
  padding-top: 1px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--concrete);
}

.footer-contact__value {
  color: var(--chalk);
  word-break: break-word;
}

.footer-note {
  margin-top: 14px;
  padding-left: 12px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--concrete);
  border-left: 2px solid rgba(255, 209, 102, 0.55);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding-block: 20px 28px;
  border-top: 1px solid var(--line-soft);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--concrete);
}

.footer-bottom__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
}

.footer-icp {
  letter-spacing: 0.08em;
  color: var(--muted);
}

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

.footer-bottom__links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
}

.footer-bottom__link {
  color: var(--concrete);
  transition: color 0.2s ease;
}

.footer-bottom__link:hover {
  color: var(--lime);
}

.footer-bottom__link:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

/* =========================================================
   响应式
   ========================================================= */
@media (max-width: 1024px) {
  .footer-body {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }

  .footer-brand {
    grid-column: 1 / -1;
  }

  .footer-intro,
  .footer-hint {
    max-width: 52ch;
  }
}

@media (max-width: 900px) {
  .site-header__top {
    background:
      linear-gradient(105deg, transparent 0 68%, rgba(56, 225, 214, 0.10) 68% 84%, transparent 84% 100%),
      linear-gradient(100deg, rgba(24, 43, 87, 0.95) 0%, rgba(17, 30, 66, 0.80) 60%, rgba(11, 19, 43, 0.55) 100%);
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-header__main-inner {
    min-height: 56px;
  }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    z-index: 5;
    flex: none;
    max-height: 0;
    overflow: hidden;
    background: linear-gradient(180deg, #111E42 0%, #0B132B 100%);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 26px 52px rgba(0, 0, 0, 0.55);
    transition: max-height 0.38s cubic-bezier(0.2, 0.7, 0.3, 1);
  }

  .site-nav[data-open="true"] {
    max-height: 78vh;
    overflow-y: auto;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px var(--gutter) 26px;
  }

  .site-nav__link {
    display: block;
    width: 100%;
    padding: 15px 0 15px 14px;
    font-size: 17px;
    letter-spacing: 0.14em;
    border-bottom: 1px solid var(--line-soft);
    border-left: 2px solid transparent;
  }

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

  .site-nav__link[aria-current="page"] {
    color: var(--lime);
    border-left-color: var(--lime);
    background: rgba(182, 255, 59, 0.06);
  }

  .header-cta {
    margin-left: auto;
  }

  .split {
    grid-template-columns: minmax(0, 1fr);
  }

  .grid--3,
  .grid--4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .header-aux__list {
    display: none;
  }

  .brand__line {
    font-size: 10px;
    letter-spacing: 0.24em;
  }

  .footer-body {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
  }

  .footer-nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-contact__label {
    width: 58px;
  }
}

@media (max-width: 560px) {
  .brand__name {
    font-size: 16px;
  }

  .brand__mark {
    width: 22px;
    height: 22px;
  }

  .site-header__top-inner {
    min-height: 52px;
    gap: 12px;
  }

  .site-header__main-inner {
    min-height: 54px;
    gap: 12px;
  }

  .collect-toggle {
    padding: 6px 12px;
    font-size: 11px;
    letter-spacing: 0.06em;
  }

  .header-cta {
    padding: 8px 13px;
    font-size: 12px;
    letter-spacing: 0.08em;
  }

  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: minmax(0, 1fr);
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .footer-bottom__legal {
    gap: 12px;
  }
}

/* =========================================================
   动效偏好
   ========================================================= */
@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;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}