/* ============================================================
   平博线上站 · 共享站点样式 /assets/site.css
   夜间赛场数据指挥台 · 侧边轨道导航 · 切角面板
   ============================================================ */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.72;
  color: var(--fog);
  background-color: var(--ink);
  background-image:
    radial-gradient(58% 40% at 92% -8%, rgba(25, 201, 176, 0.15), transparent 70%),
    radial-gradient(46% 34% at 4% 104%, rgba(255, 138, 61, 0.09), transparent 72%);
  background-attachment: fixed;
  padding-left: var(--rail-w);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6, p, figure, blockquote, ul, ol, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video, canvas { display: block; max-width: 100%; height: auto; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: inherit; }

::selection { background: rgba(53, 242, 196, 0.32); color: #ffffff; }

/* ---------- 2. Tokens ---------- */
:root {
  /* 色彩 */
  --pine: #0B2B26;
  --pine-2: #0A211D;
  --ink: #101614;
  --ink-deep: #070F0E;
  --panel: #1E3A34;
  --fog: #E8EFEA;
  --fog-soft: #BFD3CC;
  --fog-dim: #6F8F84;
  --cyan: #35F2C4;
  --teal: #19C9B0;
  --orange: #FF8A3D;
  --coral: #FF6B6B;
  --white: #FFFFFF;

  /* 结构 */
  --rail-w: 272px;
  --header-h: 64px;
  --content-max: 1200px;
  --gutter: clamp(18px, 4vw, 56px);
  --radius: 14px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);

  /* 字体 */
  --font-display: "Inter Tight", "Barlow Condensed", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", SFMono-Regular, Consolas, "Liberation Mono", monospace;
}

/* ---------- 3. 中文排版 ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.012em;
  color: var(--white);
  text-wrap: balance;
  overflow-wrap: break-word;
}
h1 { font-size: clamp(2.4rem, 6.4vw, 4.6rem); letter-spacing: 0.01em; }
h2 { font-size: clamp(1.5rem, 3vw, 2.4rem); }
h3 { font-size: clamp(1.15rem, 2vw, 1.5rem); }
h4 { font-size: 1.02rem; }
p { overflow-wrap: break-word; }
strong { color: var(--white); font-weight: 800; }

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--teal);
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  flex: 0 0 auto;
  background: var(--cyan);
}

.data-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
  color: var(--white);
}

/* ---------- 4. 布局容器与工具类 ---------- */
.container {
  width: 100%;
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.stack { display: flex; flex-direction: column; gap: clamp(14px, 2vw, 24px); }
.cluster { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.is-hidden { display: none !important; }

/* ---------- 5. Skip link ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 300;
  padding: 11px 20px;
  border-radius: 9px;
  background: var(--cyan);
  color: #04211C;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-decoration: none;
  transform: translateY(-200%);
  transition: transform 0.2s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible { transform: translateY(0); }

/* ---------- 6. Header / 侧边轨道 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--rail-w);
  z-index: 90;
  padding: 24px 18px 22px;
  overflow-y: auto;
  overscroll-behavior: contain;
  background:
    radial-gradient(130% 44% at 0% 0%, rgba(53, 242, 196, 0.16), transparent 62%),
    linear-gradient(180deg, #0B2B26 0%, #0A211D 52%, #070F0E 100%);
  border-right: 1px solid rgba(53, 242, 196, 0.18);
  scrollbar-width: thin;
}
.site-header::after {
  content: "";
  position: absolute;
  left: -60%;
  right: -60%;
  top: 56%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(53, 242, 196, 0.5), transparent);
  transform: rotate(-20deg);
  pointer-events: none;
}

.rail__inner {
  display: flex;
  flex-direction: column;
  gap: 20px;
  min-height: 100%;
}

.rail__top {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  text-decoration: none;
  color: var(--fog);
  min-width: 0;
}
.brand__mark {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  flex: 0 0 auto;
  width: 36px;
  height: 36px;
  padding: 0 7px;
  background: rgba(53, 242, 196, 0.12);
  border: 1px solid rgba(53, 242, 196, 0.36);
  clip-path: polygon(0 0, 100% 0, 100% 78%, 22% 100%, 0 100%);
}
.brand__mark i {
  display: block;
  height: 3px;
  background: var(--cyan);
  transform: skewX(-26deg);
}
.brand__mark i:nth-child(2) { width: 72%; background: var(--teal); }
.brand__mark i:nth-child(3) { width: 100%; height: 2px; background: var(--orange); }
.brand__text { display: flex; flex-direction: column; line-height: 1.24; min-width: 0; }
.brand__name {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--white);
  white-space: nowrap;
}
.brand__sub {
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fog-dim);
  white-space: nowrap;
}

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 8px 12px;
  border-radius: 9px;
  border: 1px solid rgba(53, 242, 196, 0.35);
  background: rgba(53, 242, 196, 0.1);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background-color 0.18s var(--ease), color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.nav-toggle__bars {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 3px;
  width: 18px;
}
.nav-toggle__bars i {
  display: block;
  height: 2px;
  background: currentColor;
  transition: transform 0.22s var(--ease), opacity 0.22s var(--ease);
}
.nav-toggle__bars i:nth-child(2) { width: 70%; }
.nav-toggle__text { line-height: 1; }
.nav-toggle[aria-expanded="true"] {
  background: var(--cyan);
  border-color: var(--cyan);
  color: #04211C;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

/* 导航 */
.rail__nav { display: block; }
.rail__eyebrow {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--fog-dim);
}
.rail__list {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.rail__link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 9px;
  color: var(--fog-soft);
  text-decoration: none;
  font-family: var(--font-display);
  font-size: 14.5px;
  font-weight: 700;
  letter-spacing: 0.05em;
  transition: color 0.18s var(--ease), background-color 0.18s var(--ease), padding-left 0.18s var(--ease);
}
.rail__link::before {
  content: "";
  flex: 0 0 auto;
  width: 14px;
  height: 2px;
  background: var(--fog-dim);
  opacity: 0.55;
  transition: width 0.18s var(--ease), background-color 0.18s var(--ease), opacity 0.18s var(--ease);
}
.rail__link:hover { color: var(--white); background: rgba(53, 242, 196, 0.08); }
.rail__link:hover::before { width: 20px; background: var(--teal); opacity: 1; }
.rail__link[aria-current="page"] {
  color: var(--white);
  padding-left: 16px;
  background: linear-gradient(90deg, rgba(53, 242, 196, 0.2), rgba(53, 242, 196, 0) 90%);
}
.rail__link[aria-current="page"]::before {
  width: 22px;
  background: var(--cyan);
  opacity: 1;
  box-shadow: 0 0 12px var(--cyan);
}
.rail__link[aria-current="page"]::after {
  content: "";
  margin-left: auto;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(53, 242, 196, 0.16);
}

/* 切换器 */
.rail__switch {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: auto;
  padding-top: 18px;
  border-top: 1px solid rgba(111, 143, 132, 0.24);
}
.switch {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
  padding: 4px;
  border-radius: 10px;
  background: rgba(16, 22, 20, 0.72);
  border: 1px solid rgba(111, 143, 132, 0.24);
}
.switch__btn {
  padding: 8px 4px;
  border: 0;
  border-radius: 7px;
  background: transparent;
  color: #A9C0B8;
  font-family: var(--font-display);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: background-color 0.18s var(--ease), color 0.18s var(--ease), box-shadow 0.18s var(--ease);
}
.switch__btn:hover { color: var(--white); background: rgba(53, 242, 196, 0.1); }
.switch__btn.is-active {
  background: var(--cyan);
  color: #06221C;
  box-shadow: 0 6px 18px -10px var(--cyan);
}
.rail__hint {
  margin: 2px 0 0;
  font-size: 11px;
  line-height: 1.6;
  color: var(--fog-dim);
}

/* 轨道 CTA */
.rail__cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 4px;
  padding: 13px 16px;
  background: var(--orange);
  color: #2A1206;
  font-family: var(--font-display);
  font-size: 13.5px;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-decoration: none;
  border-radius: 9px;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 14px 100%, 0 calc(100% - 14px));
  transition: background-color 0.18s var(--ease), transform 0.18s var(--ease);
}
.rail__cta:hover { background: #FFA163; transform: translateY(-1px); }

/* ---------- 7. Footer ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 8vw, 110px);
  padding: clamp(44px, 6vw, 84px) var(--gutter) 0;
  overflow: hidden;
  background:
    radial-gradient(80% 120% at 100% 0%, rgba(53, 242, 196, 0.1), transparent 62%),
    linear-gradient(180deg, #0C1A17 0%, #080F0E 100%);
  border-top: 1px solid rgba(53, 242, 196, 0.2);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), rgba(53, 242, 196, 0) 44%, rgba(255, 138, 61, 0.9) 78%, rgba(255, 138, 61, 0));
  pointer-events: none;
}

.footer__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
  max-width: var(--content-max);
  margin: 0 auto;
}
.footer__brand { min-width: 0; }
.footer__note {
  margin: 16px 0 0;
  max-width: 34ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--fog-soft);
}
.footer__pulse {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 16px 0 0;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}
.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  animation: statusPulse 2.4s var(--ease) infinite;
}
@keyframes statusPulse {
  0%   { box-shadow: 0 0 0 0 rgba(53, 242, 196, 0.55); }
  70%  { box-shadow: 0 0 0 9px rgba(53, 242, 196, 0); }
  100% { box-shadow: 0 0 0 0 rgba(53, 242, 196, 0); }
}

.footer__nav {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(128px, 1fr));
  gap: 26px 20px;
  align-content: start;
  min-width: 0;
}
.footer__group { min-width: 0; }
.footer__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.18em;
  color: var(--cyan);
}
.footer__links {
  display: flex;
  flex-direction: column;
  gap: 9px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.footer__links a {
  color: var(--fog-soft);
  font-size: 14px;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.footer__links a:hover { color: var(--cyan); border-bottom-color: rgba(53, 242, 196, 0.6); }

.footer__contact { min-width: 0; }
.footer__contact-list {
  display: flex;
  flex-direction: column;
  gap: 13px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.footer__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fog-dim);
}
.footer__value {
  display: block;
  margin-top: 2px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--fog);
  overflow-wrap: anywhere;
}

.footer__base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  max-width: var(--content-max);
  margin: clamp(34px, 5vw, 60px) auto 0;
  padding: 22px 0 30px;
  border-top: 1px solid rgba(111, 143, 132, 0.22);
}
.footer__legal {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--fog-dim);
}
.footer__icp { color: var(--fog-soft); }
.footer__service {
  margin: 0;
  max-width: 46ch;
  font-size: 12px;
  line-height: 1.7;
  color: var(--fog-dim);
}

/* ---------- 8. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 24px;
  border: 1px solid transparent;
  border-radius: 10px;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.18s var(--ease), color 0.18s var(--ease),
              border-color 0.18s var(--ease), transform 0.18s var(--ease), box-shadow 0.18s var(--ease);
}
.btn--primary {
  background: var(--cyan);
  color: #04211C;
}
.btn--primary:hover {
  background: #5CF7D3;
  transform: translateY(-1px);
  box-shadow: 0 12px 30px -14px var(--cyan);
}
.btn--accent {
  background: var(--orange);
  color: #2A1206;
}
.btn--accent:hover { background: #FFA163; transform: translateY(-1px); }
.btn--ghost {
  background: rgba(53, 242, 196, 0.06);
  border-color: rgba(53, 242, 196, 0.32);
  color: var(--fog);
}
.btn--ghost:hover {
  background: rgba(53, 242, 196, 0.14);
  border-color: var(--cyan);
  color: var(--white);
}
.btn--cut { clip-path: polygon(0 0, 100% 0, 100% 68%, calc(100% - 14px) 100%, 0 100%); border-radius: 0; }
.btn--sm { padding: 9px 16px; font-size: 12.5px; }

/* ---------- 9. 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--fog-dim);
  text-transform: uppercase;
}
.breadcrumb a {
  color: #9FB8AF;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.breadcrumb a:hover { color: var(--cyan); border-bottom-color: var(--cyan); }
.breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(111, 143, 132, 0.6);
}
.breadcrumb [aria-current="page"] { color: var(--fog); }

/* ---------- 10. 面板 / Bento / 网格 ---------- */
.panel {
  position: relative;
  padding: clamp(18px, 2.4vw, 30px);
  border: 1px solid rgba(111, 143, 132, 0.22);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(30, 58, 52, 0.92), rgba(16, 22, 20, 0.95));
  overflow: hidden;
}
.panel--cut {
  border-radius: 0;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.bento {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(12px, 1.5vw, 20px);
}
.bento > * { grid-column: span 12; min-width: 0; }

/* ---------- 11. 媒体容器（页面阶段放置图片用） ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  border-radius: var(--radius);
  aspect-ratio: 16 / 9;
  background: linear-gradient(140deg, #14332D, #0B1512);
  isolation: isolate;
}
.media--tall { aspect-ratio: 3 / 4; }
.media--square { aspect-ratio: 1 / 1; }
.media img,
.media > picture > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media__veil {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(8, 16, 15, 0) 32%, rgba(8, 16, 15, 0.82) 100%);
  pointer-events: none;
}
.media__tag {
  position: absolute;
  top: 14px;
  left: 14px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  border-radius: 999px;
  background: rgba(8, 16, 15, 0.78);
  border: 1px solid rgba(53, 242, 196, 0.42);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.media--ghost::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(-45deg, rgba(53, 242, 196, 0.11) 0 1px, transparent 1px 14px);
  opacity: 0.7;
}

/* ---------- 12. 标签 / 筛选按钮 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid rgba(53, 242, 196, 0.3);
  background: rgba(53, 242, 196, 0.08);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.tag--accent {
  border-color: rgba(255, 138, 61, 0.4);
  background: rgba(255, 138, 61, 0.12);
  color: var(--orange);
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 15px;
  border-radius: 999px;
  border: 1px solid rgba(111, 143, 132, 0.34);
  background: rgba(30, 58, 52, 0.55);
  color: var(--fog-soft);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: background-color 0.18s var(--ease), color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.chip:hover { color: var(--white); border-color: var(--teal); background: rgba(25, 201, 176, 0.14); }
.chip.is-active,
.chip[aria-pressed="true"] {
  background: var(--cyan);
  border-color: var(--cyan);
  color: #04211C;
}

/* ---------- 13. 滚动进度 / 显现 ---------- */
.scroll-meter {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 120;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan), var(--teal) 55%, var(--orange));
  pointer-events: none;
  will-change: transform;
}

[data-js="on"] [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
[data-js="on"] [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 14. 焦点可见 ---------- */
a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible,
.switch__btn:focus-visible,
.chip:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}
.rail__link:focus-visible { outline-offset: 0; }

/* ---------- 15. 平板 / 桌面微调 ---------- */
@media (min-width: 1025px) and (max-width: 1280px) {
  :root { --rail-w: 236px; }
  .rail__link { font-size: 13.5px; }
}

@media (min-width: 640px) {
  .bento > .bento__half { grid-column: span 6; }
  .bento > .bento__third { grid-column: span 4; }
}

@media (min-width: 1024px) {
  .bento > .bento__focus { grid-column: span 8; }
  .bento > .bento__side { grid-column: span 4; }
  .bento > .bento__half { grid-column: span 6; }
  .bento > .bento__third { grid-column: span 4; }
  .bento > .bento__tall { grid-row: span 2; }
}

@media (min-width: 820px) {
  .footer__grid { grid-template-columns: minmax(0, 1.15fr) minmax(0, 1.55fr); }
  .footer__contact { grid-column: 1 / -1; }
}

@media (min-width: 1180px) {
  .footer__grid { grid-template-columns: minmax(0, 1.05fr) minmax(0, 1.6fr) minmax(0, 1fr); }
  .footer__contact { grid-column: auto; }
}

/* ---------- 16. 移动端：顶栏 + 抽屉 ---------- */
@media (max-width: 1024px) {
  body {
    padding-left: 0;
    padding-top: var(--header-h);
    background-attachment: scroll;
  }

  .site-header {
    top: 0;
    left: 0;
    right: 0;
    bottom: auto;
    width: 100%;
    height: var(--header-h);
    padding: 0;
    overflow: hidden;
    border-right: 0;
    border-bottom: 1px solid rgba(53, 242, 196, 0.18);
    transition: height 0.3s var(--ease), box-shadow 0.3s var(--ease);
  }
  .site-header::after { display: none; }
  .site-header[data-open="true"] {
    height: 100vh;
    height: 100dvh;
    overflow-y: auto;
    overscroll-behavior: contain;
    box-shadow: 0 30px 60px -20px rgba(0, 0, 0, 0.85);
  }

  .rail__inner {
    height: auto;
    min-height: 0;
    padding: 0 var(--gutter) 28px;
    gap: 14px;
  }
  .rail__top {
    min-height: var(--header-h);
    justify-content: space-between;
    flex: 0 0 auto;
  }
  .nav-toggle { display: inline-flex; }

  .rail__nav .rail__eyebrow { margin-top: 6px; }
  .rail__link {
    font-size: 16px;
    padding: 13px 14px;
  }
  .rail__link::before { width: 18px; }

  .rail__switch {
    margin-top: 8px;
    padding-top: 16px;
    border-top: 1px dashed rgba(111, 143, 132, 0.3);
  }
  .rail__cta {
    margin-top: 6px;
    padding: 15px 16px;
    font-size: 15px;
  }

  .footer__pulse { margin-top: 14px; }
}

/* ---------- 17. 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;
    scroll-behavior: auto !important;
  }

  [data-js="on"] [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .scroll-meter { display: none; }
}