/* ============================================================
   安卓体育站 · 共享样式表  /assets/site.css
   夜空底 · 荧光青数据线 · 奖杯金强调 · 非对称栅格 · 画册式排版
   ============================================================ */

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

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

body,
h1, h2, h3, h4, h5, h6,
p, ul, ol, li, figure, figcaption,
blockquote, dl, dt, dd { margin: 0; }

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

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

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

a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; width: 100%; }

/* ---------- 2. 变量 ---------- */
:root {
  /* 夜空底与层次 */
  --night: #050C1A;
  --night-2: #0B1830;
  --night-3: #071021;
  --glass: rgba(61, 242, 208, 0.08);
  --glass-line: rgba(61, 242, 208, 0.22);
  --hairline: rgba(138, 160, 192, 0.16);

  /* 强调色 */
  --cyan: #3DF2D0;
  --cyan-deep: #0F8C7A;
  --gold: #F3B23F;
  --red: #E4474C;
  --steel: #8AA0C0;
  --paper: #F2F6FC;

  /* 卡片色相偏移 */
  --violet: #7A5CFF;
  --wine: #A6325A;
  --teal: #0E6E74;
  --amber: #D9822B;

  /* 尺度 */
  --shell: min(1440px, 100% - clamp(28px, 6vw, 96px));
  --gutter: clamp(14px, 2vw, 28px);
  --header-h: 78px;
  --rail-w: 88px;

  /* 字体 */
  --font-display: "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-data: ui-monospace, "SF Mono", "JetBrains Mono", "Roboto Mono", Menlo, Consolas, monospace;
}

/* ---------- 3. 页面基色与草原夜空纹理 ---------- */
body {
  min-height: 100vh;
  background-color: var(--night);
  background-image:
    radial-gradient(1100px 620px at 84% -6%, rgba(61, 242, 208, 0.10), transparent 62%),
    radial-gradient(900px 560px at 4% 10%, rgba(122, 92, 255, 0.10), transparent 66%),
    linear-gradient(180deg, #050C1A 0%, #071026 46%, #050C1A 100%);
  background-attachment: fixed;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(138, 160, 192, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(138, 160, 192, 0.055) 1px, transparent 1px);
  background-size: 88px 88px;
  -webkit-mask-image: radial-gradient(circle at 50% 26%, #000 0%, transparent 78%);
  mask-image: radial-gradient(circle at 50% 26%, #000 0%, transparent 78%);
}

#main-content {
  position: relative;
  z-index: 1;
  scroll-margin-top: calc(var(--header-h) + 24px);
}

/* ---------- 4. 焦点与可访问性 ---------- */
:focus { outline: none; }

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

.skip-link {
  position: absolute;
  left: clamp(14px, 3vw, 34px);
  top: -90px;
  z-index: 120;
  padding: 11px 20px;
  background: var(--cyan);
  color: #04100E;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  transition: top 0.22s ease;
}

.skip-link:focus {
  top: 12px;
}

/* ---------- 5. 布局骨架 ---------- */
.shell {
  width: var(--shell);
  margin-inline: auto;
}

.section {
  position: relative;
  z-index: 1;
  padding-block: clamp(56px, 8vw, 120px);
}

.section--tight { padding-block: clamp(34px, 4.5vw, 68px); }

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gutter);
}

.rail {
  position: relative;
  min-width: 0;
}

@media (min-width: 961px) {
  .col-2 { grid-column: span 2; }
  .col-3 { grid-column: span 3; }
  .col-4 { grid-column: span 4; }
  .col-5 { grid-column: span 5; }
  .col-6 { grid-column: span 6; }
  .col-7 { grid-column: span 7; }
  .col-8 { grid-column: span 8; }
  .col-9 { grid-column: span 9; }
  .col-10 { grid-column: span 10; }
  .col-12 { grid-column: span 12; }
}

/* ---------- 6. 文字级别 ---------- */
.eyebrow,
.index-label {
  display: block;
  font-family: var(--font-data);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--steel);
}

.section-num {
  display: block;
  font-family: var(--font-data);
  font-weight: 800;
  font-size: clamp(40px, 6vw, 88px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(61, 242, 208, 0.5);
}

.display {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(52px, 8vw, 148px);
  line-height: 0.92;
  letter-spacing: -0.025em;
  color: var(--paper);
}

.h2 {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(30px, 4.4vw, 62px);
  line-height: 1.06;
  letter-spacing: -0.015em;
}

.h3 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(19px, 1.6vw, 24px);
  line-height: 1.35;
  letter-spacing: 0.01em;
}

.lede {
  font-size: clamp(16px, 1.2vw, 18.5px);
  line-height: 1.8;
  color: var(--steel);
  max-width: 62ch;
}

.muted { color: var(--steel); }
.accent-cyan { color: var(--cyan); }
.accent-gold { color: var(--gold); }
.accent-red { color: var(--red); }

/* ---------- 7. 正文容器 ---------- */
.prose {
  max-width: 62ch;
  font-size: 17px;
  line-height: 1.85;
  color: #D9E3F2;
}

.prose p + p { margin-top: 1.15em; }
.prose ul,
.prose ol { margin-top: 1.15em; padding-left: 1.2em; }
.prose ul { list-style: none; }
.prose ul li { position: relative; padding-left: 1em; }
.prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.75em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
}
.prose ol { list-style: decimal; }
.prose li + li { margin-top: 0.5em; }

.prose h2,
.prose h3 {
  margin-top: 1.9em;
  margin-bottom: 0.6em;
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.25;
  color: var(--paper);
}

.prose h2 { font-size: clamp(24px, 2.4vw, 34px); }
.prose h3 { font-size: clamp(19px, 1.7vw, 23px); }

.prose a {
  color: var(--cyan);
  border-bottom: 1px solid rgba(61, 242, 208, 0.35);
  transition: border-color 0.2s ease, color 0.2s ease;
}

.prose a:hover { border-bottom-color: var(--cyan); }

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

/* ---------- 8. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 24px;
  border: 1px solid rgba(138, 160, 192, 0.3);
  color: var(--paper);
  font-size: 14px;
  letter-spacing: 0.08em;
  line-height: 1.2;
  transition: background 0.22s ease, color 0.22s ease, border-color 0.22s ease, transform 0.22s ease;
}

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

.btn--primary {
  background: var(--gold);
  border-color: var(--gold);
  color: #0B1020;
  font-weight: 700;
}

.btn--primary:hover {
  background: #FFC65C;
  border-color: #FFC65C;
}

.btn--ghost:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  background: var(--glass);
}

.btn--small { padding: 9px 16px; font-size: 13px; }

/* ---------- 9. 面包屑 ---------- */
.breadcrumb {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--steel);
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
}

.breadcrumb__list li {
  display: flex;
  align-items: center;
}

.breadcrumb__list li + li::before {
  content: "";
  width: 18px;
  height: 1px;
  margin-inline: 10px;
  background: rgba(138, 160, 192, 0.42);
}

.breadcrumb__list a:hover { color: var(--cyan); }
.breadcrumb__list [aria-current="page"] { color: rgba(242, 246, 252, 0.9); }

/* ---------- 10. 卡片 / 玻璃层 / 控制台 ---------- */
.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: clamp(20px, 2.4vw, 32px);
  background: var(--night-2);
  border: 1px solid var(--hairline);
  overflow: hidden;
  transition: border-color 0.24s ease, transform 0.24s ease;
}

.card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 0;
  background: var(--accent, var(--cyan));
  transition: height 0.34s cubic-bezier(0.22, 0.61, 0.36, 1);
}

.card:hover { border-color: rgba(138, 160, 192, 0.34); }
.card:hover::before { height: 100%; }

.card__label {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--accent, var(--cyan));
}

.card__title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(19px, 1.7vw, 24px);
  line-height: 1.3;
}

.card__text {
  font-size: 15px;
  line-height: 1.75;
  color: var(--steel);
}

.card__foot {
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid var(--hairline);
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--steel);
}

[data-tags][hidden] { display: none !important; }

.panel-glass {
  background: var(--glass);
  border: 1px solid var(--glass-line);
  -webkit-backdrop-filter: blur(14px) saturate(130%);
  backdrop-filter: blur(14px) saturate(130%);
}

.console {
  display: grid;
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
}

.console__cell {
  background: var(--night-2);
  padding: clamp(16px, 2vw, 28px);
}

.stat { display: flex; flex-direction: column; gap: 8px; }

.stat__label {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--steel);
}

.stat__value {
  font-family: var(--font-data);
  font-weight: 800;
  font-size: clamp(38px, 6vw, 84px);
  line-height: 0.95;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
}

.stat__value--gold { color: var(--gold); }
.stat__value--red { color: var(--red); }
.stat__value--paper { color: var(--paper); }
.stat__value--xl { font-size: clamp(64px, 10vw, 190px); }

.stat__unit {
  margin-left: 0.34em;
  font-size: 0.3em;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--steel);
}

/* ---------- 11. 数据条 ---------- */
.databar {
  position: relative;
  height: 6px;
  background: rgba(138, 160, 192, 0.14);
  overflow: hidden;
}

.databar__fill {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan-deep), var(--cyan));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.85s cubic-bezier(0.22, 0.61, 0.36, 1);
}

.is-in .databar__fill,
.databar.is-in .databar__fill {
  transform: scaleX(var(--v, 1));
}

/* ---------- 12. 筛选栏 ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 10px;
  background: var(--glass);
  border: 1px solid var(--glass-line);
  -webkit-backdrop-filter: blur(14px) saturate(130%);
  backdrop-filter: blur(14px) saturate(130%);
}

.filter-btn {
  padding: 8px 16px;
  border: 1px solid rgba(138, 160, 192, 0.22);
  color: var(--steel);
  font-size: 13px;
  letter-spacing: 0.08em;
  line-height: 1.3;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.filter-btn:hover {
  color: var(--paper);
  border-color: var(--glass-line);
}

.filter-btn[aria-pressed="true"] {
  background: var(--cyan);
  border-color: var(--cyan);
  color: #04100E;
  font-weight: 700;
}

.filter-status {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--steel);
}

/* ---------- 13. 赛季时间轴（基础） ---------- */
.season-rail { position: relative; }

.season-rail__list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.season-rail__btn {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 7px 0;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--steel);
  text-align: left;
  transition: color 0.2s ease;
}

.season-rail__btn:hover { color: var(--paper); }

.season-rail__btn[aria-selected="true"] {
  color: var(--cyan);
  font-weight: 700;
}

.season-rail__btn[aria-selected="true"]::before {
  content: "";
  width: 14px;
  height: 2px;
  background: var(--cyan);
}

@media (min-width: 961px) {
  .season-rail {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }
}

/* ---------- 14. 显现 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.22, 0.61, 0.36, 1);
}

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

/* ---------- 15. 图片容器基础 ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--hairline);
  background-color: var(--night-2);
  background-image:
    radial-gradient(120% 100% at 18% 0%, rgba(61, 242, 208, 0.16), transparent 62%),
    linear-gradient(160deg, #0B1830 0%, #071021 72%);
}

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

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(rgba(242, 246, 252, 0.05) 1px, transparent 1px);
  background-size: 100% 33.34%;
}

.media-frame--21x9 { aspect-ratio: 21 / 9; }
.media-frame--16x9 { aspect-ratio: 16 / 9; }
.media-frame--4x3 { aspect-ratio: 4 / 3; }
.media-frame--1x1 { aspect-ratio: 1 / 1; }

.figure { margin: 0; }

.figure figcaption {
  margin-top: 12px;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--steel);
}

/* ---------- 16. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(5, 12, 26, 0.76);
  border-bottom: 1px solid var(--hairline);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  backdrop-filter: blur(18px) saturate(140%);
}

.site-header__inner {
  width: var(--shell);
  margin-inline: auto;
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: clamp(16px, 3vw, 48px);
  padding-block: 10px;
  transition: min-height 0.28s ease;
}

.brand-block {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 28px);
  min-width: 0;
}

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

.brand__mark {
  width: 14px;
  height: 34px;
  flex: none;
  background: linear-gradient(180deg, var(--cyan) 0%, rgba(61, 242, 208, 0.06) 100%);
  -webkit-clip-path: polygon(0 0, 100% 22%, 100% 78%, 0 100%);
  clip-path: polygon(0 0, 100% 22%, 100% 78%, 0 100%);
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--paper);
  white-space: nowrap;
}

.brand__sub {
  margin-top: 4px;
  font-family: var(--font-data);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--steel);
  max-height: 16px;
  opacity: 1;
  overflow: hidden;
  transition: opacity 0.24s ease, max-height 0.24s ease, margin-top 0.24s ease;
}

.version-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border: 1px solid var(--glass-line);
  background: var(--glass);
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.08em;
  line-height: 1.4;
  white-space: nowrap;
}

.version-badge__label {
  color: var(--steel);
  letter-spacing: 0.2em;
}

.version-badge__num {
  color: var(--gold);
  font-weight: 700;
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}

.version-badge__meta {
  padding-left: 8px;
  border-left: 1px solid rgba(138, 160, 192, 0.28);
  color: var(--steel);
}

/* 移动端栏目按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border: 1px solid var(--glass-line);
  background: var(--glass);
  color: var(--paper);
  font-size: 13px;
  letter-spacing: 0.16em;
  line-height: 1;
}

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 18px;
  height: 14px;
}

.nav-toggle__bars i {
  display: block;
  height: 1.5px;
  background: var(--cyan);
  transition: transform 0.26s ease, opacity 0.2s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:first-child {
  transform: translateY(3.25px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:last-child {
  transform: translateY(-3.25px) rotate(-45deg);
}

.nav-toggle__label { color: var(--steel); }

.nav-toggle[aria-expanded="true"] .nav-toggle__label { color: var(--cyan); }

/* 主导航 */
.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 34px);
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.site-nav__list a {
  position: relative;
  display: inline-block;
  padding: 10px 12px;
  font-size: 14.5px;
  color: var(--steel);
  transition: color 0.2s ease;
}

.site-nav__list a::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 4px;
  height: 1px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.24s cubic-bezier(0.22, 0.61, 0.36, 1);
}

.site-nav__list a:hover { color: var(--paper); }
.site-nav__list a:hover::after { transform: scaleX(1); }

.site-nav__list a[aria-current="page"] { color: var(--cyan); }
.site-nav__list a[aria-current="page"]::after { transform: scaleX(1); }

.site-nav__cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border: 1px solid var(--glass-line);
  background: var(--glass);
  color: var(--cyan);
  font-size: 13.5px;
  letter-spacing: 0.06em;
  line-height: 1.3;
  white-space: nowrap;
  transition: background 0.22s ease, color 0.22s ease, border-color 0.22s ease;
}

.site-nav__cta:hover {
  background: var(--cyan);
  border-color: var(--cyan);
  color: #04100E;
  font-weight: 700;
}

/* 滚动进度 */
.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: rgba(138, 160, 192, 0.12);
  overflow: hidden;
}

.scroll-progress span {
  display: block;
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--cyan-deep), var(--cyan) 62%, var(--gold));
  transform: scaleX(0);
  transform-origin: left center;
  will-change: transform;
}

/* 滚动收缩态 */
.site-header.is-condensed .site-header__inner { min-height: 58px; }

.site-header.is-condensed .brand__text { font-size: 13.5px; letter-spacing: 0.12em; }

.site-header.is-condensed .brand__sub {
  max-height: 0;
  margin-top: 0;
  opacity: 0;
}

.site-header.is-condensed .brand__mark { height: 26px; }

.site-header.is-condensed .version-badge__meta { display: none; }

/* ---------- 17. 页脚 ---------- */
.site-footer {
  position: relative;
  z-index: 1;
  margin-top: clamp(80px, 12vw, 180px);
  border-top: 1px solid var(--hairline);
  background: linear-gradient(180deg, rgba(11, 24, 48, 0.62) 0%, rgba(5, 12, 26, 0.96) 100%);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--cyan) 34%, var(--gold) 62%, transparent 100%);
  opacity: 0.55;
}

.site-footer__inner {
  width: var(--shell);
  margin-inline: auto;
  padding-block: clamp(48px, 7vw, 96px);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 3.4vw, 48px);
}

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

.footer-col__title {
  margin-bottom: 14px;
  font-family: var(--font-data);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--cyan);
}

.footer-col__title--spaced { margin-top: 22px; }

.footer-col__text {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--steel);
  max-width: 34ch;
}

.footer-col__mark {
  margin-top: 12px;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(138, 160, 192, 0.75);
}

.footer-links li + li { margin-top: 9px; }

.footer-links a {
  font-size: 14.5px;
  color: var(--steel);
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.footer-links a:hover {
  color: var(--cyan);
  padding-left: 4px;
}

.footer-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.footer-chips a {
  display: inline-block;
  padding: 4px 9px;
  border: 1px solid rgba(138, 160, 192, 0.2);
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.06em;
  line-height: 1.5;
  color: var(--steel);
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.footer-chips a:hover {
  color: var(--cyan);
  border-color: var(--glass-line);
  background: var(--glass);
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--steel);
}

.footer-contact strong {
  font-family: var(--font-data);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--gold);
  word-break: break-all;
}

.site-footer__base {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px 28px;
  margin-top: clamp(36px, 5vw, 64px);
  padding-top: 22px;
  border-top: 1px solid var(--hairline);
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.06em;
  line-height: 1.7;
  color: var(--steel);
}

.footer-legal { font-variant-numeric: tabular-nums; }

.footer-legal span[data-year] { color: var(--paper); }

.footer-note {
  max-width: 62ch;
  color: rgba(138, 160, 192, 0.8);
}

/* ---------- 18. 响应式 ---------- */
@media (max-width: 1180px) {
  .site-nav__list a { padding: 10px 8px; font-size: 13.5px; }
  .site-nav__list a::after { left: 8px; right: 8px; }
  .site-nav__cta { padding: 8px 12px; font-size: 12.5px; }
}

@media (min-width: 720px) {
  .site-footer__grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .footer-col--brand { grid-column: span 3; }
  .footer-col--index { grid-column: span 2; }
}

@media (min-width: 1080px) {
  .site-footer__grid {
    grid-template-columns: 1.7fr 1fr 1.5fr 1.3fr 1fr;
  }
  .footer-col--brand,
  .footer-col--index { grid-column: auto; }
}

@media (max-width: 960px) {
  :root { --header-h: 66px; }

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

  .version-badge__meta { display: none; }

  .site-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    padding: 16px clamp(14px, 6vw, 40px) 34px;
    background: linear-gradient(180deg, rgba(11, 24, 48, 0.985) 0%, rgba(5, 12, 26, 0.995) 100%);
    border-bottom: 1px solid var(--glass-line);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.55);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-12px);
    transition: opacity 0.24s ease, transform 0.24s ease, visibility 0.24s ease;
  }

  .site-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

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

  .site-nav__list li { border-bottom: 1px solid rgba(138, 160, 192, 0.12); }

  .site-nav__list a {
    display: block;
    padding: 15px 4px;
    font-size: 16.5px;
  }

  .site-nav__list a::after {
    left: 4px;
    right: auto;
    bottom: 12px;
    width: 24px;
  }

  .site-nav__cta {
    justify-content: center;
    margin-top: 22px;
    padding: 14px 18px;
    font-size: 14px;
  }
}

@media (max-width: 640px) {
  body { font-size: 15.5px; }

  .brand__sub { letter-spacing: 0.18em; }

  .version-badge { padding: 5px 9px; }

  .version-badge__num { font-size: 12px; }

  .site-footer__base { flex-direction: column; align-items: flex-start; }
}

/* ---------- 19. 降低动效偏好 ---------- */
@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;
  }

  [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }

  .databar__fill { transform: scaleX(var(--v, 1)) !important; }

  .btn:hover { transform: none; }
}