/* ============================================================
   星空体育 /assets/site.css
   共享外壳：reset、变量、中文排版、页头、页脚、通用组件
   ============================================================ */

/* ---------- reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

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

ul, ol { list-style: none; }

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

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

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

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

hr { border: 0; border-top: 1px solid var(--line); }

/* ---------- 变量 ---------- */
:root {
  --ink-900: #050B1F;
  --ink-800: #0A1733;
  --ink-700: #0E1F3F;
  --violet: #6C4BE8;
  --violet-soft: #B9A9FF;
  --cyan: #2EF2E0;
  --orange: #FF8A3D;
  --white: #F2F5FF;
  --gray: #9AA8C7;
  --gray-dim: #7C8AAB;
  --green: #4BE39B;
  --ice: #7FD8FF;
  --line: #1E2B4D;
  --mist: #E7ECFB;

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

  --radius-s: 12px;
  --radius-m: 20px;
  --radius-l: 28px;

  --shadow-lift: 0 20px 44px -26px rgba(0, 0, 0, 0.92);
  --glow-cyan: 0 0 14px rgba(46, 242, 224, 0.55);

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --dur: 220ms;
}

/* ---------- 基础排版 ---------- */
body {
  min-height: 100vh;
  background-color: var(--ink-900);
  background-image:
    radial-gradient(1100px 620px at 84% -10%, rgba(108, 75, 232, 0.30), transparent 62%),
    radial-gradient(760px 520px at 4% 6%, rgba(46, 242, 224, 0.12), transparent 66%),
    radial-gradient(980px 720px at 50% 116%, rgba(108, 75, 232, 0.20), transparent 70%);
  background-repeat: no-repeat;
  color: var(--white);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4 { line-height: 1.18; font-weight: 600; }

strong { font-weight: 600; color: var(--white); }

::selection { background: rgba(46, 242, 224, 0.28); color: var(--white); }

:focus-visible {
  outline: 2px solid var(--ice);
  outline-offset: 3px;
  border-radius: 6px;
}

#main-content { display: block; scroll-margin-top: 24px; }
#main-content:focus { outline: none; }

/* 画册式字级 */
.display {
  font-size: clamp(44px, 9.4vw, 112px);
  font-weight: 200;
  line-height: 0.98;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-title {
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 200;
  line-height: 1.08;
  letter-spacing: 0.01em;
  color: var(--white);
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--cyan);
}

.lede {
  max-width: 62ch;
  font-size: clamp(16px, 1.6vw, 19px);
  line-height: 1.8;
  color: #C7D2EC;
}

.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

/* ---------- 布局 ---------- */
.container {
  width: 100%;
  max-width: 1280px;
  margin-inline: auto;
  padding-inline: clamp(18px, 4vw, 40px);
}

.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 24px;
}

.section {
  position: relative;
  padding-block: clamp(48px, 7vw, 96px);
}

.section--tight { padding-block: clamp(32px, 4.5vw, 60px); }
.section--flush { padding-block: 0; }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px 20px;
  margin-bottom: clamp(20px, 3vw, 34px);
}

.section-head__index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.28em;
  color: var(--gray);
  transition: color var(--dur) var(--ease), text-shadow var(--dur) var(--ease);
}

[data-section].is-active .section-head__index {
  color: var(--cyan);
  text-shadow: var(--glow-cyan);
}

.section-head__title {
  font-size: clamp(24px, 2.6vw, 28px);
  font-weight: 600;
  letter-spacing: 0.04em;
}

.section-head__note {
  margin-left: auto;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--gray);
}

.divider {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, rgba(46, 242, 224, 0.4), rgba(108, 75, 232, 0.35), transparent);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.06em;
  white-space: nowrap;
  transition: transform var(--dur) var(--ease), background-color var(--dur) var(--ease),
    border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.btn--primary {
  background: var(--cyan);
  color: #04101F;
  box-shadow: 0 14px 32px -18px rgba(46, 242, 224, 0.95);
}

.btn--primary:hover { background: var(--ice); transform: translateY(-2px); }

.btn--quiet {
  border-color: var(--line);
  color: var(--gray);
}

.btn--quiet:hover {
  border-color: var(--violet);
  color: var(--white);
  transform: translateY(-2px);
}

.btn--ghost {
  background: rgba(108, 75, 232, 0.14);
  border-color: rgba(108, 75, 232, 0.5);
  color: var(--white);
}

.btn--ghost:hover {
  background: rgba(108, 75, 232, 0.26);
  border-color: var(--violet-soft);
  transform: translateY(-2px);
}

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

/* ---------- 标签 ---------- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gray);
}

.chip--cyan { border-color: rgba(46, 242, 224, 0.5); color: var(--cyan); }
.chip--violet { border-color: rgba(108, 75, 232, 0.55); color: var(--violet-soft); }
.chip--orange { border-color: rgba(255, 138, 61, 0.5); color: var(--orange); }

/* ---------- 卡片 ---------- */
.card {
  position: relative;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: linear-gradient(160deg, rgba(10, 23, 51, 0.96), rgba(10, 23, 51, 0.7));
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}

.card:hover {
  border-color: rgba(46, 242, 224, 0.6);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lift);
}

.card--focus {
  padding: clamp(24px, 3vw, 34px);
  border-radius: var(--radius-l);
}

.card--cut { border-radius: var(--radius-s) var(--radius-m) var(--radius-s) 6px; }

/* ---------- 数据 ---------- */
.stat { display: flex; flex-direction: column; gap: 4px; }

.stat__value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(22px, 3vw, 36px);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--white);
}

.stat__value--accent { color: var(--orange); }

.stat__label {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gray);
}

/* ---------- 图片容器 ---------- */
.media {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background:
    radial-gradient(120% 120% at 18% 8%, rgba(108, 75, 232, 0.38), transparent 62%),
    radial-gradient(90% 90% at 86% 92%, rgba(46, 242, 224, 0.2), transparent 62%),
    var(--ink-800);
}

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

.media--grid::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.45;
  background-image:
    linear-gradient(115deg, rgba(127, 216, 255, 0.12) 0 1px, transparent 1px 100%);
  background-size: 16px 16px;
}

.media--16x9 { aspect-ratio: 16 / 9; }
.media--4x3 { aspect-ratio: 4 / 3; }
.media--1x1 { aspect-ratio: 1 / 1; }
.media--3x4 { aspect-ratio: 3 / 4; }
.media--cut { border-radius: var(--radius-s) var(--radius-l) var(--radius-s) var(--radius-l); }

/* ---------- 正文 ---------- */
.prose {
  max-width: 68ch;
  font-size: 17px;
  line-height: 1.75;
  color: #D8DFF5;
}

.prose > * + * { margin-top: 1.05em; }

.prose h2 {
  margin-top: 2.1em;
  font-size: clamp(22px, 2.4vw, 28px);
  letter-spacing: 0.03em;
  color: var(--white);
}

.prose h3 {
  margin-top: 1.6em;
  font-size: 18px;
  letter-spacing: 0.04em;
  color: var(--white);
}

.prose ul,
.prose ol {
  display: grid;
  gap: 0.5em;
  padding-left: 1.2em;
  list-style: disc;
}

.prose a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.prose a:hover { color: var(--ice); }

.prose blockquote {
  padding: 16px 22px;
  border-left: 2px solid var(--violet);
  border-radius: 0 16px 16px 0;
  background: rgba(108, 75, 232, 0.1);
  color: var(--mist);
}

/* ---------- 面包屑 ---------- */
.breadcrumb { padding-top: 22px; }

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gray);
}

.breadcrumb__list li { display: flex; align-items: center; gap: 10px; }

.breadcrumb__list li + li::before { content: "/"; color: var(--line); }

.breadcrumb a:hover { color: var(--cyan); }

.breadcrumb [aria-current="page"] { color: var(--white); }

/* ============================================================
   页头
   ============================================================ */
.skip-link {
  position: absolute;
  left: 16px;
  top: -80px;
  z-index: 300;
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--cyan);
  color: #04101F;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  transition: top var(--dur) var(--ease);
}

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

.site-header {
  position: relative;
  z-index: 60;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(5, 11, 31, 0.96), rgba(5, 11, 31, 0.72));
}

.site-header__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px 20px;
  padding-top: 18px;
  padding-bottom: 16px;
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  justify-self: start;
}

.brand__mark {
  position: relative;
  flex: none;
  width: 34px;
  height: 34px;
  border-radius: 12px 12px 12px 4px;
  background: conic-gradient(from 210deg, var(--cyan), var(--violet) 55%, var(--orange) 82%, var(--cyan));
  box-shadow: 0 0 0 1px rgba(46, 242, 224, 0.3), 0 0 26px -8px rgba(46, 242, 224, 0.85);
}

.brand__mark::after {
  content: "";
  position: absolute;
  inset: 9px;
  border-radius: 50%;
  background: var(--ink-900);
}

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

.brand__name {
  font-size: 19px;
  font-weight: 600;
  letter-spacing: 0.16em;
  line-height: 1.2;
  color: var(--white);
}

.brand__line {
  font-size: 11px;
  letter-spacing: 0.16em;
  line-height: 1.2;
  color: var(--gray);
}

/* 右侧工具区 */
.site-header__aside {
  display: flex;
  align-items: center;
  gap: 10px;
  justify-self: end;
  min-width: 0;
}

.header-tagline {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gray);
  white-space: nowrap;
}

.density-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gray);
  white-space: nowrap;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}

.density-toggle::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--gray);
  transition: background-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.density-toggle:hover { border-color: var(--cyan); color: var(--white); }

.density-toggle[aria-pressed="true"] {
  border-color: rgba(46, 242, 224, 0.6);
  color: var(--cyan);
  background: rgba(46, 242, 224, 0.08);
}

.density-toggle[aria-pressed="true"]::before {
  background: var(--cyan);
  box-shadow: var(--glow-cyan);
}

.density-toggle__label { font-weight: 600; }

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 9px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--white);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.nav-toggle:hover { border-color: var(--cyan); background: rgba(46, 242, 224, 0.06); }

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 16px;
  height: 10px;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 1.5px;
  border-radius: 2px;
  background: currentColor;
  transition: transform var(--dur) var(--ease);
}

.nav-toggle__bars::before { top: 0; }
.nav-toggle__bars::after { bottom: 0; }

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(4px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { transform: translateY(-4px) rotate(-45deg); }

/* 栏目索引 */
.site-nav {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 4px;
  padding-top: 12px;
  border-top: 1px solid rgba(30, 43, 77, 0.75);
}

.site-nav__index {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--gray);
}

.site-nav__track {
  flex: 1 1 auto;
  min-width: 20px;
  height: 1px;
  background: linear-gradient(90deg, rgba(46, 242, 224, 0.4), rgba(108, 75, 232, 0.55), rgba(30, 43, 77, 0));
}

.site-nav__list {
  flex: none;
  display: flex;
  align-items: center;
  gap: 2px;
}

.site-nav__item { display: flex; align-items: center; }

.site-nav__item + .site-nav__item::before {
  content: "";
  flex: none;
  width: 14px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line), transparent);
}

.site-nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border-radius: 999px;
  font-size: 14px;
  color: var(--gray);
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.site-nav__link:hover {
  color: var(--white);
  background: rgba(108, 75, 232, 0.14);
}

.site-nav__link[aria-current="page"] {
  color: var(--white);
  background: rgba(46, 242, 224, 0.1);
}

.site-nav__dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--line);
  transition: background-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.site-nav__link:hover .site-nav__dot { background: var(--violet-soft); }

.site-nav__link[aria-current="page"] .site-nav__dot {
  background: var(--cyan);
  box-shadow: var(--glow-cyan);
}

.site-nav__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  opacity: 0.75;
}

.site-nav__name { letter-spacing: 0.08em; }

.site-nav__hint {
  position: absolute;
  left: 50%;
  top: calc(100% + 10px);
  z-index: 20;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(10, 23, 51, 0.97);
  color: var(--ice);
  font-size: 12px;
  letter-spacing: 0.1em;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateX(-50%) translateY(-4px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease),
    visibility var(--dur) var(--ease);
}

.site-nav__link:hover .site-nav__hint,
.site-nav__link:focus-visible .site-nav__hint {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.site-nav__actions { display: none; }

/* 阅读进度 */
.read-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  height: 3px;
  background: rgba(30, 43, 77, 0.55);
  pointer-events: none;
}

.read-progress__bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--violet), var(--cyan) 62%, var(--orange));
  transition: width 120ms linear;
}

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 8vw, 110px);
  border-top: 1px solid var(--line);
  overflow: hidden;
  background: linear-gradient(180deg, rgba(5, 11, 31, 0) 0%, rgba(10, 23, 51, 0.9) 24%, #060D22 100%);
}

.site-footer::before {
  content: "";
  position: absolute;
  left: -12%;
  right: 42%;
  top: -160px;
  height: 420px;
  background: radial-gradient(closest-side, rgba(108, 75, 232, 0.35), transparent 72%);
  pointer-events: none;
}

.site-footer__inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.9fr);
  gap: clamp(28px, 4vw, 64px);
  padding-block: clamp(44px, 6vw, 72px);
}

.site-footer__brand { min-width: 0; }

.footer-brand {
  font-size: clamp(22px, 2.4vw, 26px);
  font-weight: 200;
  letter-spacing: 0.22em;
  color: var(--white);
}

.footer-brand__line {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 0.26em;
  color: var(--cyan);
}

.footer-brand__note {
  margin-top: 14px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--gray);
}

.footer-cta { margin-top: 24px; }

.site-footer__cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(18px, 3vw, 40px);
}

.footer-col {
  position: relative;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.footer-col::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 34px;
  height: 1px;
  background: var(--cyan);
}

.footer-col__title {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.24em;
  color: var(--white);
}

.footer-col__list {
  display: grid;
  gap: 10px;
  margin-top: 16px;
}

.footer-col__list a {
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--gray);
  transition: color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

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

.site-footer__meta {
  position: relative;
  display: grid;
  gap: 8px;
  padding-block: 26px 36px;
  border-top: 1px solid var(--line);
}

.footer-contact {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--mist);
}

.footer-address { font-size: 13px; color: var(--gray); }

.footer-service {
  max-width: 74ch;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--gray-dim);
}

.footer-legal {
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--gray);
}

.footer-year { font-family: var(--font-mono); color: var(--white); }

/* ============================================================
   状态与动效
   ============================================================ */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 320ms var(--ease), transform 320ms var(--ease);
}

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

html[data-density="scan"] [data-density-detail] { display: none !important; }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1180px) {
  .header-tagline { display: none; }
}

@media (max-width: 1023px) {
  .grid { grid-template-columns: repeat(8, minmax(0, 1fr)); gap: 20px; }

  .site-header__inner { padding-top: 14px; padding-bottom: 14px; }

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

  .site-nav {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin-top: 0;
    padding-top: 0;
    border-top-color: transparent;
  }

  .site-nav[data-open] {
    display: flex;
    margin-top: 8px;
    padding-top: 12px;
    border-top: 1px solid var(--line);
  }

  .site-nav__index,
  .site-nav__track { display: none; }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .site-nav__item { width: 100%; }

  .site-nav__item + .site-nav__item::before { display: none; }

  .site-nav__link {
    width: 100%;
    justify-content: flex-start;
    padding: 13px 10px;
    border-radius: 12px;
    font-size: 15px;
  }

  .site-nav__link .site-nav__hint,
  .site-nav__link:hover .site-nav__hint,
  .site-nav__link:focus-visible .site-nav__hint {
    position: static;
    transform: none;
    opacity: 1;
    visibility: visible;
    margin-left: auto;
    padding: 0;
    border: 0;
    background: none;
    color: var(--gray);
    font-size: 12px;
    letter-spacing: 0.1em;
  }

  .site-nav[data-open] .site-nav__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    padding: 14px 10px 6px;
  }

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

@media (max-width: 900px) {
  .header-cta-secondary { display: none; }
}

@media (max-width: 700px) {
  .header-cta-primary { display: none; }
}

@media (max-width: 639px) {
  .grid { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }

  .nav-toggle { padding: 9px 12px; }
  .nav-toggle__text { display: none; }

  .brand__name { letter-spacing: 0.12em; }

  .site-footer__cols { grid-template-columns: minmax(0, 1fr); gap: 24px; }

  .card { padding: 20px; }
}

@media (min-width: 720px) {
  .site-footer__meta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
  }

  .footer-contact,
  .footer-address,
  .footer-service { grid-column: 1; }

  .footer-legal { grid-column: 2; grid-row: 1 / span 3; align-self: end; text-align: right; }
}

/* ============================================================
   减少动效 / 平滑滚动
   ============================================================ */
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

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

  .read-progress__bar { transition: none; }
}