/* ==========================================================================
   天行体育主站 · 共享样式 /assets/site.css
   高原竞技数据场：深空墨蓝底 + 晨光橙强调 + 琥珀数据锚点 + 玻璃层
   ========================================================================== */

:root {
  --ink: #0B1B2B;
  --ink-deep: #07131F;
  --glass: #1E3A4F;
  --slate: #263F4A;
  --orange: #F26B2A;
  --orange-soft: #FF7D3D;
  --amber: #FFB020;
  --amber-soft: #FFE2A8;
  --green: #6B8F5E;
  --snow: #F4F1E9;
  --charcoal: #121820;
  --mist: #8FA3B0;

  --line: rgba(143, 163, 176, 0.26);
  --line-strong: rgba(143, 163, 176, 0.48);
  --on-dark-soft: rgba(244, 241, 233, 0.78);
  --on-dark-faint: rgba(244, 241, 233, 0.56);

  --radius: 14px;
  --radius-sm: 8px;
  --maxw: 1240px;
  --gutter: clamp(16px, 4vw, 40px);

  --font-body: "Noto Sans SC", "Source Han Sans SC", "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-display: "Barlow Condensed", "HarmonyOS Sans SC", "Source Han Sans SC", "Noto Sans SC", "PingFang SC", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --shadow-glass: 0 18px 44px -26px rgba(0, 0, 0, 0.85);
  --skew: -3deg;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  background-color: var(--ink);
}

body {
  margin: 0;
  min-height: 100%;
  background-color: var(--ink);
  background-image:
    linear-gradient(rgba(143, 163, 176, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(143, 163, 176, 0.045) 1px, transparent 1px);
  background-size: 72px 72px, 72px 72px;
  color: var(--snow);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 { margin: 0 0 0.5em; line-height: 1.2; font-weight: 700; }
p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }
ul, ol { margin: 0; padding: 0; }
img, svg, video { max-width: 100%; display: block; }
a { color: var(--amber); text-decoration: none; }
a:hover { color: var(--amber-soft); }
button { font: inherit; color: inherit; }
::selection { background: var(--amber); color: var(--charcoal); }

[id] { scroll-margin-top: 120px; }
#main-content:focus { outline: none; }

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

/* ---------- 排版基础 ---------- */
.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
}

.muted { color: var(--on-dark-soft); }
.card--solid .muted,
.card--amber .muted { color: #4E5C66; }

.index-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.6;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mist);
}

/* ---------- 容器与节奏 ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(32px, 5vw, 64px); }
.section--tight { padding-block: clamp(20px, 3vw, 34px); }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 18px;
  margin-bottom: clamp(16px, 2.4vw, 26px);
}

.section-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 3vw, 34px);
  letter-spacing: -0.01em;
  line-height: 1.15;
}

.page-head { padding-block: clamp(26px, 4.4vw, 54px) clamp(18px, 3vw, 30px); }

.page-title {
  margin: 0 0 0.35em;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 5vw, 58px);
  line-height: 1.06;
  letter-spacing: -0.015em;
  transform: skewX(var(--skew));
  transform-origin: left bottom;
}

.lede {
  max-width: 62ch;
  margin: 0;
  color: var(--on-dark-soft);
  font-size: clamp(15px, 1.4vw, 17px);
}

.rule {
  height: 1px;
  border: 0;
  margin: 0;
  background: var(--line);
}

.stack > * + * { margin-top: clamp(12px, 1.8vw, 20px); }

/* ---------- 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mist);
}

.breadcrumb a { color: var(--mist); }
.breadcrumb a:hover { color: var(--amber); }
.breadcrumb-sep { color: rgba(143, 163, 176, 0.5); }

/* ---------- 网格 ---------- */
.grid {
  display: grid;
  gap: clamp(12px, 2vw, 20px);
}

.grid--bento {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(12px, 1.8vw, 20px);
}

.span-3 { grid-column: span 3; }
.span-4 { grid-column: span 4; }
.span-6 { grid-column: span 6; }
.span-8 { grid-column: span 8; }
.span-12 { grid-column: span 12; }

.grid--2 {
  display: grid;
  gap: clamp(12px, 2vw, 20px);
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.grid--3 {
  display: grid;
  gap: clamp(12px, 2vw, 20px);
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

/* ---------- 卡片与层 ---------- */
.card {
  position: relative;
  padding: clamp(16px, 2.4vw, 26px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(30, 58, 79, 0.55);
  color: var(--snow);
}

.card--glass {
  background: rgba(30, 58, 79, 0.38);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: var(--shadow-glass);
}

.card--solid {
  background: var(--snow);
  color: var(--charcoal);
  border-color: transparent;
}

.card--amber {
  background: var(--amber-soft);
  color: var(--charcoal);
  border-color: var(--amber-soft);
}

.card--cut {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 30px), calc(100% - 30px) 100%, 0 100%);
}

.panel {
  padding: clamp(16px, 2.4vw, 26px);
  background: var(--slate);
  color: var(--snow);
  border: 1px solid rgba(143, 163, 176, 0.18);
}

/* ---------- 标签与状态 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.6;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--snow);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 8px 100%, 0 100%);
}

.tag--amber { background: var(--amber); border-color: var(--amber); color: var(--charcoal); }
.tag--orange { background: var(--orange); border-color: var(--orange); color: var(--ink-deep); }
.tag--green { background: rgba(107, 143, 94, 0.22); border-color: rgba(107, 143, 94, 0.65); color: #BFDCAF; }
.tag--muted { color: var(--mist); border-color: var(--line); }

.status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.6;
  letter-spacing: 0.06em;
  color: var(--mist);
  white-space: nowrap;
}

.status::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  flex: 0 0 auto;
}

.status--active {
  color: #AECF9F;
  border-color: rgba(107, 143, 94, 0.65);
  background: rgba(107, 143, 94, 0.16);
}

.status--pending {
  color: var(--charcoal);
  background: var(--amber-soft);
  border-color: var(--amber-soft);
}

.status--expired { color: var(--mist); border-color: var(--line); }

.status--focus {
  color: var(--amber);
  border-color: rgba(255, 176, 32, 0.6);
  background: rgba(255, 176, 32, 0.12);
}

/* ---------- 数字锚点 ---------- */
.data-num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(30px, 4.4vw, 52px);
  line-height: 1;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
  color: var(--amber);
}

.data-num--snow { color: var(--snow); }

/* ---------- 媒体容器 ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(30, 58, 79, 0.92) 0%, rgba(11, 27, 43, 0.95) 100%);
  aspect-ratio: 16 / 10;
}

.media--wide { aspect-ratio: 21 / 9; }
.media--square { aspect-ratio: 1 / 1; }
.media--tall { aspect-ratio: 3 / 4; }

.media__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.media__mark {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 14px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(143, 163, 176, 0.8);
  background-image: linear-gradient(135deg, transparent calc(50% - 1px), rgba(143, 163, 176, 0.22) 50%, transparent calc(50% + 1px));
}

.media__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.5;
  letter-spacing: 0.06em;
  color: var(--snow);
  background: linear-gradient(to top, rgba(7, 19, 31, 0.94), rgba(7, 19, 31, 0));
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.01em;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}

.btn--primary {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--ink-deep);
}

.btn--primary:hover {
  background: var(--orange-soft);
  border-color: var(--orange-soft);
  color: var(--ink-deep);
  transform: translateY(-1px);
}

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

.btn--ghost:hover {
  border-color: var(--amber);
  color: var(--amber);
}

.btn--quiet {
  background: rgba(30, 58, 79, 0.8);
  border-color: transparent;
  color: var(--snow);
}

.btn--quiet:hover { background: rgba(38, 63, 74, 0.95); color: var(--amber-soft); }

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

.btn:focus-visible { outline: 2px solid var(--amber); outline-offset: 3px; }

/* ---------- 筛选条 ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(30, 58, 79, 0.5);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.filter-btn {
  appearance: none;
  padding: 6px 14px;
  border: 1px solid transparent;
  border-radius: 999px;
  background: transparent;
  color: var(--snow);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.filter-btn:hover { color: var(--amber); }

.filter-btn[aria-pressed="true"] {
  background: var(--amber-soft);
  border-color: var(--amber-soft);
  color: var(--charcoal);
}

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

.is-filtered-out { display: none !important; }

/* ---------- 显现与工具 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.2, 0.7, 0.2, 1);
}

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

.to-top {
  position: fixed;
  right: clamp(12px, 3vw, 28px);
  bottom: clamp(12px, 3vw, 28px);
  z-index: 70;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: rgba(30, 58, 79, 0.94);
  color: var(--snow);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.22s ease, transform 0.22s ease, visibility 0.22s ease, border-color 0.22s ease;
  box-shadow: var(--shadow-glass);
}

.to-top[data-visible="true"] {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.to-top:hover { border-color: var(--amber); color: var(--amber); }

/* ==========================================================================
   头部
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(11, 27, 43, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: box-shadow 0.24s ease, border-color 0.24s ease;
}

.site-header[data-scrolled="true"] {
  border-bottom-color: rgba(255, 176, 32, 0.34);
  box-shadow: 0 16px 34px -24px rgba(0, 0, 0, 0.95);
}

.skip-link {
  position: absolute;
  left: 10px;
  top: -120px;
  z-index: 200;
  padding: 10px 18px;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  background: var(--amber-soft);
  color: var(--charcoal);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-decoration: none;
  transition: top 0.18s ease;
}

.skip-link:focus {
  top: 0;
  color: var(--charcoal);
  outline: 2px solid var(--ink);
  outline-offset: -4px;
}

/* 上层：状态条 */
.header-top {
  background: var(--ink-deep);
  border-bottom: 1px solid rgba(143, 163, 176, 0.16);
}

.header-top-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 20px;
  min-height: 34px;
  padding-block: 5px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.07em;
}

.header-tagline {
  margin: 0;
  color: var(--snow);
}

.header-sub {
  margin: 0;
  color: var(--mist);
}

.header-status {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
  color: var(--mist);
}

.status-dot {
  width: 7px;
  height: 7px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 3px rgba(107, 143, 94, 0.22);
}

.status-text { white-space: nowrap; }

.status-link {
  color: var(--amber);
  border-bottom: 1px solid transparent;
  white-space: nowrap;
}

.status-link:hover {
  color: var(--amber-soft);
  border-bottom-color: currentColor;
}

/* 下层：品牌 + 栏目 */
.header-main { position: relative; }

.header-main-inner {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2.4vw, 32px);
  min-height: 68px;
  padding-block: 10px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  color: var(--snow);
  text-decoration: none;
}

.brand:hover { color: var(--snow); }

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  background: var(--orange);
  color: var(--ink-deep);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 22px;
  line-height: 1;
  border-radius: 6px;
  clip-path: polygon(0 0, 100% 0, 100% 66%, 74% 100%, 0 100%);
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  line-height: 1.1;
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 20px;
  letter-spacing: 0.03em;
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mist);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  margin-left: auto;
  padding: 9px 14px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: rgba(30, 58, 79, 0.8);
  color: var(--snow);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  cursor: pointer;
}

.nav-toggle:hover { border-color: var(--amber); color: var(--amber); }

.nav-toggle-bars {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  transition: background-color 0.2s ease;
}

.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: currentColor;
  transition: transform 0.22s ease, top 0.22s ease;
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle-bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before { top: 0; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after { top: 0; transform: rotate(-45deg); }

.nav-toggle-label { line-height: 1; }

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.8vw, 22px);
  margin-left: auto;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 2px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-item { margin: 0; }

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 9px 10px;
  border-radius: 6px;
  color: var(--snow);
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  transition: background-color 0.18s ease, color 0.18s ease;
}

.nav-index {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.nav-link:hover {
  background: rgba(30, 58, 79, 0.75);
  color: var(--amber-soft);
}

.nav-link:hover .nav-index { color: var(--amber); }

.nav-link[aria-current="page"] { color: var(--amber); }

.nav-link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: 2px;
  height: 2px;
  background: var(--orange);
  transform: skewX(-30deg);
}

.nav-link[aria-current="page"] .nav-index { color: var(--orange); }

.header-cta { white-space: nowrap; flex: 0 0 auto; }

.scroll-progress {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--orange), var(--amber));
  transition: width 0.1s linear;
}

/* ==========================================================================
   页脚
   ========================================================================== */
.site-footer {
  margin-top: clamp(32px, 6vw, 72px);
  background: linear-gradient(180deg, rgba(7, 19, 31, 0.98) 0%, rgba(11, 27, 43, 1) 100%);
  border-top: 1px solid var(--line);
}

.footer-strip {
  height: 6px;
  background: repeating-linear-gradient(
    90deg,
    var(--orange) 0 48px,
    var(--amber) 48px 58px,
    rgba(30, 58, 79, 0.95) 58px 132px
  );
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(200px, 1.1fr) minmax(280px, 2fr) minmax(240px, 1.2fr);
  gap: clamp(20px, 3.4vw, 48px);
  padding-block: clamp(28px, 4vw, 48px);
}

.footer-brand-name {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 2.6vw, 28px);
  letter-spacing: 0.02em;
  color: var(--snow);
}

.footer-tagline {
  margin: 0 0 14px;
  color: var(--on-dark-soft);
  font-size: 14px;
}

.footer-copy {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.footer-nav-groups {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: clamp(16px, 2.4vw, 32px);
}

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

.footer-group-title {
  margin: 0 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--amber);
}

.footer-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-link {
  display: inline-block;
  color: var(--on-dark-soft);
  font-size: 14.5px;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.16s ease, border-color 0.16s ease;
}

.footer-link:hover {
  color: var(--amber-soft);
  border-bottom-color: rgba(255, 176, 32, 0.5);
}

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

.footer-contact-line {
  margin: 0 0 8px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--on-dark-soft);
  word-break: break-word;
}

.footer-note {
  margin: 12px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--mist);
}

.footer-legal {
  border-top: 1px solid var(--line);
  background: rgba(7, 19, 31, 0.7);
}

.footer-legal-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  padding-block: 16px;
}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 1080px) {
  .footer-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1.6fr); }
  .footer-contact { grid-column: 1 / -1; }
}

@media (max-width: 1024px) {
  .span-3 { grid-column: span 6; }
  .span-4 { grid-column: span 6; }
  .span-8 { grid-column: span 12; }
  .page-title { transform: none; }
}

@media (max-width: 960px) {
  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 14px;
    margin-left: 0;
    padding: 16px var(--gutter) 22px;
    max-height: calc(100vh - 90px);
    overflow-y: auto;
    background: rgba(9, 23, 37, 0.99);
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-glass);
  }

  .site-nav[data-open="true"] { display: flex; }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav-link {
    width: 100%;
    justify-content: flex-start;
    padding: 13px 12px;
    border-bottom: 1px solid rgba(143, 163, 176, 0.14);
    border-radius: 0;
    font-size: 16px;
  }

  .nav-link:hover { background: rgba(30, 58, 79, 0.4); }

  .nav-link[aria-current="page"]::after {
    left: 0;
    right: auto;
    top: 0;
    bottom: 0;
    width: 3px;
    height: auto;
    transform: none;
  }

  .header-cta { width: 100%; padding-block: 12px; }

  .header-sub { display: none; }
  .header-status { margin-left: auto; }
}

@media (max-width: 760px) {
  .span-6 { grid-column: span 12; }
  .footer-grid { grid-template-columns: minmax(0, 1fr); }
  .footer-contact { grid-column: auto; }
  .footer-legal-inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 640px) {
  .header-top-inner { font-size: 11px; gap: 4px 14px; }
  .header-tagline { flex: 1 1 100%; }
  .header-status { margin-left: 0; flex: 1 1 100%; }
  .brand-mark { width: 38px; height: 38px; font-size: 20px; }
  .brand-name { font-size: 18px; }
  .filter-bar { border-radius: var(--radius); padding: 8px; }
  .status-text { display: none; }
}

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

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

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