/* 造物星辰 · 全站共享：token / 导航 / 页脚 / 产品页骨架 */
:root {
  --bg: #000;
  --fg: #fff;
  --fg2: rgba(255, 255, 255, 0.78);
  --fg3: rgba(255, 255, 255, 0.45);
  --fg4: rgba(255, 255, 255, 0.28);
  --line: rgba(255, 255, 255, 0.08);
  --line2: rgba(255, 255, 255, 0.14);
  --surface: rgba(255, 255, 255, 0.04);
  --surface2: rgba(255, 255, 255, 0.06);
  --accent: #2f5bff;
  --nav-h: 68px;
  --pad-x: clamp(20px, 3.4vw, 48px);
  --max: 1080px;
  --font: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --lat: 'Barlow Semi Condensed', 'Noto Sans SC', sans-serif;
  --bar: 'Barlow', sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { background: var(--bg); color-scheme: dark; }
body.site {
  min-height: 100%;
  font-family: var(--font);
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.skip-link {
  position: absolute; left: 12px; top: 12px; z-index: 100;
  padding: 10px 16px;
  background: #fff; color: #000;
  font-size: 13px; letter-spacing: 0.08em;
  text-decoration: none; border-radius: 4px;
  transform: translateY(-120%);
  transition: transform 0.2s ease;
}
.skip-link:focus { transform: translateY(0); outline: 2px solid #fff; outline-offset: 2px; }

.lat { font-family: var(--lat); }
.bar { font-family: var(--bar); }
a { color: inherit; }

/* ===== Nav ===== */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 20;
  height: var(--nav-h);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 var(--pad-x);
  background: rgba(0, 0, 0, 0.88);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.nav .logo {
  display: flex; align-items: center; gap: 12px;
  text-decoration: none; color: var(--fg);
}
.nav .logo img,
.nav .logo .mark {
  width: 22px; height: 22px; flex: none;
  display: block;
}
.nav .logo .name {
  font-size: 15px; font-weight: 500; letter-spacing: 0.3em;
}
.nav .logo .en {
  font-family: var(--lat);
  font-size: 10px; font-weight: 500;
  letter-spacing: 0.28em;
  color: var(--fg3);
  margin-left: 4px; padding-left: 14px;
  border-left: 1px solid var(--line2);
}
.nav .links { display: flex; gap: clamp(18px, 2.6vw, 40px); }
.nav .links a {
  position: relative;
  font-size: 12px; font-weight: 400;
  letter-spacing: 0.22em;
  color: var(--fg2);
  text-decoration: none;
  padding: 6px 2px;
  transition: color 0.3s ease;
}
.nav .links a::after {
  content: ''; position: absolute; left: 0; bottom: 0;
  width: 0; height: 1px; background: var(--fg);
  transition: width 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}
.nav .links a:hover,
.nav .links a[aria-current="page"] { color: var(--fg); }
.nav .links a:hover::after,
.nav .links a[aria-current="page"]::after { width: 100%; }

/* ===== Page shell ===== */
.page {
  position: relative; z-index: 1;
  padding: calc(var(--nav-h) + 48px) var(--pad-x) 0;
  max-width: calc(var(--max) + 2 * var(--pad-x));
  margin: 0 auto;
  min-height: calc(100vh - 180px);
}
.page-head { margin-bottom: clamp(36px, 6vw, 64px); }
.page-kicker {
  display: flex; align-items: center; gap: 16px;
  font-family: var(--lat);
  font-size: 12px; font-weight: 600;
  letter-spacing: 0.42em;
  text-transform: uppercase;
  color: var(--fg3);
}
.page-kicker::before {
  content: ''; width: 42px; height: 1px;
  background: rgba(255, 255, 255, 0.5);
}
.page-title {
  margin-top: 18px;
  font-size: clamp(32px, 4.5vw, 48px);
  font-weight: 700;
  letter-spacing: 0.12em;
  line-height: 1.15;
}
.page-lead {
  margin-top: 16px;
  max-width: 36em;
  font-size: 15px; font-weight: 300;
  letter-spacing: 0.12em;
  line-height: 2;
  color: var(--fg2);
}
.page-lead .en {
  display: block; margin-top: 4px;
  font-family: var(--bar);
  font-size: 11px; letter-spacing: 0.28em;
  text-transform: uppercase; color: var(--fg4);
}

/* ===== CTA ===== */
.cta {
  display: inline-flex; align-items: center; gap: 14px;
  margin-top: 28px;
  padding: 14px 36px;
  border: 2px solid rgba(255, 255, 255, 0.85);
  font-family: var(--lat);
  font-size: 13px; font-weight: 600;
  letter-spacing: 0.3em;
  color: var(--fg); text-decoration: none;
  transition: background 0.3s ease, color 0.3s ease;
}
.cta .arrow { font-family: var(--bar); transition: transform 0.3s ease; }
.cta:hover { background: var(--fg); color: #000; }
.cta:hover .arrow { transform: translateX(5px); }
.cta.ghost {
  border-color: var(--line2);
  color: var(--fg2);
  margin-left: 12px;
}
.cta.ghost:hover { background: var(--surface2); color: var(--fg); border-color: var(--fg3); }

/* ===== Product constellation（产品列表页已下线，样式已移除） ===== */

/* 「已上线」微光点：星辰语言的明暗对照（accent 唯一落点之一） */
.live-dot {
  position: absolute; top: 18px; right: 18px;
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px 2px rgba(47, 91, 255, 0.55);
  animation: livePulse 3.2s ease-in-out infinite;
}
@keyframes livePulse {
  0%, 100% { opacity: 0.55; transform: scale(0.9); }
  50%      { opacity: 1;    transform: scale(1.12); }
}

/* ===== 键盘焦点可见 ===== */
a:focus-visible, button:focus-visible, [tabindex]:focus-visible {
  outline: 2px solid rgba(255, 255, 255, 0.85);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ===== 产品页 · 实景合成图占位（待拍清单见 HTML 注释） ===== */
.feat-shot {
  border-style: solid;
  border-color: var(--line);
  background:
    radial-gradient(ellipse 80% 60% at 50% 110%, rgba(47, 91, 255, 0.06), transparent 60%),
    var(--surface);
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 10px;
}
.feat-shot .shot-label {
  font-size: 12px; letter-spacing: 0.2em; color: var(--fg4);
}
.feat-shot .shot-hint {
  font-family: var(--lat);
  font-size: 10px; letter-spacing: 0.3em; text-transform: uppercase;
  color: rgba(255, 255, 255, 0.18);
}

/* ===== 产品页 · 下载区骨架 ===== */
.dl-meta {
  margin-top: 14px;
  display: flex; justify-content: center; gap: 10px 22px; flex-wrap: wrap;
  font-size: 12px; letter-spacing: 0.14em;
  color: var(--fg3);
}
.dl-meta .v { color: var(--fg2); }
.dl-actions { margin-top: 6px; display: flex; justify-content: center; align-items: center; flex-wrap: wrap; gap: 14px; }
.cta[aria-disabled="true"] {
  border-color: var(--line2); color: var(--fg3);
  pointer-events: none;
}
.dl-sub {
  margin-top: 16px;
  font-size: 12px; letter-spacing: 0.12em; color: var(--fg4);
}
.dl-sub a { color: var(--fg3); text-decoration: underline; text-underline-offset: 4px; }
.dl-sub a:hover { color: var(--fg); }
/* 信任条 */
.trust {
  margin: 34px auto 0; max-width: 560px;
  display: flex; align-items: center; justify-content: center; gap: 12px;
  padding: 13px 22px;
  border: 1px solid var(--line); border-radius: 2px;
  background: var(--surface);
  font-size: 12px; letter-spacing: 0.16em; color: var(--fg2);
}
.trust .shield { color: var(--fg2); font-size: 14px; }
/* 价格预留卡 */
.price-card {
  margin: 44px auto 0; max-width: 560px;
  padding: 26px 28px;
  border: 1px solid var(--line); border-radius: 2px;
  background: var(--surface);
  display: flex; align-items: center; justify-content: space-between; gap: 18px; flex-wrap: wrap;
}
.price-card .p-zh { font-size: 15px; font-weight: 600; letter-spacing: 0.14em; }
.price-card .p-sub { margin-top: 6px; font-size: 12px; letter-spacing: 0.1em; color: var(--fg3); }
.price-card .p-num {
  font-family: var(--lat);
  font-size: 26px; font-weight: 700; letter-spacing: 0.06em;
}
.price-card .p-num small { font-size: 11px; font-weight: 500; color: var(--fg3); letter-spacing: 0.2em; margin-left: 8px; }
.price-card .p-soon {
  font-family: var(--lat);
  font-size: 11px; letter-spacing: 0.28em; text-transform: uppercase;
  color: var(--fg4); border: 1px solid var(--line2); padding: 8px 16px;
}

/* ===== 减少动态（子页过渡一并静止） ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .live-dot { animation: none; opacity: 0.9; }
}

/* ===== Desk product skeleton ===== */
.desk-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: clamp(28px, 5vw, 64px);
  align-items: center;
  padding-bottom: clamp(48px, 8vw, 88px);
  border-bottom: 1px solid var(--line);
}
.desk-hero .ico-lg {
  width: 112px; height: 112px; border-radius: 24px;
  overflow: hidden;
  box-shadow: 0 0 0 1px var(--line), 0 24px 60px rgba(0, 0, 0, 0.45);
}
.desk-hero .ico-lg img { width: 100%; height: 100%; display: block; }
.desk-hero h1 {
  margin-top: 22px;
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 700;
  letter-spacing: 0.14em;
  line-height: 1.1;
}
.desk-hero .en-name {
  margin-top: 8px;
  font-family: var(--lat);
  font-size: 13px; font-weight: 600;
  letter-spacing: 0.36em;
  color: var(--fg3); text-transform: uppercase;
}
.desk-hero .tag {
  margin-top: 22px;
  font-size: 15px; font-weight: 300;
  letter-spacing: 0.14em; line-height: 2;
  color: var(--fg2);
  max-width: 28em;
}
.desk-hero .actions { margin-top: 8px; display: flex; flex-wrap: wrap; align-items: center; }
.desk-visual {
  min-height: 280px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 2px;
  display: grid; place-items: center;
  color: var(--fg4);
  font-family: var(--lat);
  font-size: 12px; letter-spacing: 0.28em;
  text-transform: uppercase;
}

.feat-block {
  padding: clamp(48px, 8vw, 88px) 0;
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
}
.feat-block:nth-child(even) { grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr); }
.feat-block:nth-child(even) .feat-copy { order: 2; }
.feat-block:nth-child(even) .feat-shot { order: 1; }
.feat-label {
  font-family: var(--lat);
  font-size: 11px; font-weight: 600;
  letter-spacing: 0.36em;
  text-transform: uppercase; color: var(--fg3);
}
.feat-block h2 {
  margin-top: 12px;
  font-size: clamp(22px, 2.8vw, 30px);
  font-weight: 600;
  letter-spacing: 0.12em;
  line-height: 1.35;
}
.feat-block p {
  margin-top: 14px;
  font-size: 14px; font-weight: 300;
  letter-spacing: 0.08em; line-height: 1.9;
  color: var(--fg2); max-width: 32em;
}
.feat-shot {
  min-height: 220px;
  background: var(--surface);
  border: 1px dashed var(--line2);
  border-radius: 2px;
  display: grid; place-items: center;
  color: var(--fg4);
  font-size: 12px; letter-spacing: 0.2em;
}

.desk-end {
  padding: clamp(56px, 9vw, 96px) 0 24px;
  text-align: center;
}
.desk-end h2 {
  font-size: clamp(24px, 3.2vw, 34px);
  font-weight: 600; letter-spacing: 0.16em;
}
.desk-end p {
  margin-top: 12px;
  color: var(--fg3);
  font-size: 13px; letter-spacing: 0.12em;
}

/* ===== Footer ===== */
.site-footer {
  position: relative; z-index: 2;
  margin-top: 48px;
  border-top: 1px solid var(--line);
  padding: 40px var(--pad-x) 36px;
  background: #000;
}
.site-footer .inner {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 32px;
}
.site-footer .brand-line {
  font-size: 14px; font-weight: 500; letter-spacing: 0.28em;
}
.site-footer .brand-en {
  margin-top: 6px;
  font-family: var(--lat);
  font-size: 10px; letter-spacing: 0.28em;
  color: var(--fg3); text-transform: uppercase;
}
.site-footer .tagline {
  margin-top: 14px;
  font-size: 12px; font-weight: 300;
  letter-spacing: 0.12em; line-height: 1.8;
  color: var(--fg3); max-width: 22em;
}
.site-footer .col h4 {
  font-family: var(--lat);
  font-size: 10px; font-weight: 600;
  letter-spacing: 0.32em;
  text-transform: uppercase; color: var(--fg4);
  margin-bottom: 14px;
}
.site-footer .col a {
  display: block;
  font-size: 13px; letter-spacing: 0.1em;
  color: var(--fg2); text-decoration: none;
  padding: 4px 0;
  transition: color 0.25s ease;
}
.site-footer .col a:hover { color: var(--fg); }
.site-footer .bottom {
  max-width: var(--max);
  margin: 28px auto 0;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-size: 11px; letter-spacing: 0.14em;
  color: var(--fg4);
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
}

/* soft sky for product pages */
.sky-soft {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background:
    radial-gradient(ellipse 70% 40% at 70% 10%, rgba(47, 91, 255, 0.07), transparent 55%),
    radial-gradient(ellipse 50% 35% at 15% 80%, rgba(255, 255, 255, 0.03), transparent 50%),
    #000;
}

@media (max-width: 860px) {
  .nav .en { display: none; }
  .nav .links { gap: 14px; }
  .nav .links a { font-size: 11px; letter-spacing: 0.12em; }
  .desk-hero,
  .feat-block,
  .feat-block:nth-child(even) {
    grid-template-columns: 1fr;
  }
  .feat-block:nth-child(even) .feat-copy,
  .feat-block:nth-child(even) .feat-shot { order: unset; }
  .site-footer .inner { grid-template-columns: 1fr; gap: 28px; }
  .cta.ghost { margin-left: 0; margin-top: 12px; }
}

/* ============ 无障碍 + 产品大卡 + 详情页 ============ */
.sr-only {
  position: absolute; width: 1px; height: 1px;
  clip-path: inset(50%); overflow: hidden; white-space: nowrap;
}

/* ---- 课桌详情页（Linear 式：左对齐文案 + 居中大图 + 大呼吸间距） ---- */
.desk-hero2 {
  min-height: calc(100vh - var(--nav-h));
  display: flex; flex-direction: column; justify-content: center;
  gap: clamp(26px, 4vw, 40px);
  max-width: var(--max); margin: 0 auto;
  padding: 20px var(--pad-x) 48px;
}
.desk-shot {
  position: relative; border-radius: 10px; overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 0 60px rgba(160, 190, 255, 0.06), 0 30px 80px rgba(0, 0, 0, 0.45);
  aspect-ratio: 21 / 9; background: var(--surface);
}
.desk-shot img { width: 100%; height: 100%; object-fit: cover; display: block; }
.shot-ph {
  width: 100%; height: 100%;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 12px; color: var(--fg4); font-size: 13px; letter-spacing: 0.14em;
  background:
    radial-gradient(ellipse 60% 80% at 70% 30%, rgba(47, 91, 255, 0.05), transparent 60%),
    var(--surface);
}
.shot-ph small {
  font-family: var(--lat);
  font-size: 10px; letter-spacing: 0.3em; text-transform: uppercase;
  color: rgba(255, 255, 255, 0.18);
}
.desk-hero-txt h1 {
  font-size: clamp(32px, 4.6vw, 52px); font-weight: 700;
  letter-spacing: 0.1em; line-height: 1.15;
}
.desk-hero-txt h1 .en {
  font-family: var(--lat); font-weight: 500; font-size: 0.55em;
  letter-spacing: 0.24em; text-transform: uppercase;
  color: var(--fg3); margin-left: 16px;
}
.desk-hero-txt .lead {
  margin-top: 18px;
  font-size: clamp(15px, 1.8vw, 18px); font-weight: 300;
  letter-spacing: 0.1em; line-height: 1.95;
  color: var(--fg2); max-width: 34em;
}
.desk-cta { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 6px; }
.desk-cta .cta { margin-top: 0; }

/* 功能块：hairline 分隔，偶数块极弱底色交替 */
.fb { padding: clamp(72px, 10vw, 120px) var(--pad-x); border-top: 1px solid var(--line); }
.fb.alt { background: #08090a; }
.fb-in { max-width: var(--max); margin: 0 auto; }
.fb-label {
  font-family: var(--lat);
  font-size: 11px; font-weight: 600;
  letter-spacing: 0.36em; text-transform: uppercase;
  color: rgba(180, 200, 255, 0.55);
}
.fb-title {
  margin-top: 14px;
  font-size: clamp(22px, 2.8vw, 30px); font-weight: 600;
  letter-spacing: 0.1em; line-height: 1.35;
}
.fb-copy {
  margin-top: 16px;
  font-size: 14px; font-weight: 300;
  letter-spacing: 0.08em; line-height: 1.95;
  color: var(--fg2); max-width: 40em;
}
.fb-visual {
  margin: 44px auto 0; max-width: 880px; aspect-ratio: 16 / 10;
  border-radius: 10px; overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: 0 0 40px rgba(160, 190, 255, 0.05), 0 24px 60px rgba(0, 0, 0, 0.4);
  background: var(--surface);
}
.fb-visual img { width: 100%; height: 100%; object-fit: cover; display: block; }

/* 下载收口 */
.dl-cta { text-align: center; padding: clamp(80px, 12vw, 130px) var(--pad-x) 100px; border-top: 1px solid var(--line); }
.dl-cta h2 { font-size: clamp(26px, 3.6vw, 40px); font-weight: 700; letter-spacing: 0.12em; }
.dl-cta .sys { margin-top: 14px; font-size: 13px; letter-spacing: 0.16em; color: var(--fg3); }
.dl-cta .price-sub { margin-top: 18px; font-size: 12px; letter-spacing: 0.12em; color: var(--fg4); }

/* 页底 About 三块 */
.about2 { padding: 80px var(--pad-x) 90px; border-top: 1px solid var(--line); background: #08090a; }
.about2-in {
  max-width: var(--max); margin: 0 auto;
  display: grid; gap: 40px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}
.about2 h3 { font-size: 14px; font-weight: 600; letter-spacing: 0.14em; color: var(--fg); margin-bottom: 12px; }
.about2 p { font-size: 13px; font-weight: 300; letter-spacing: 0.08em; line-height: 1.95; color: var(--fg2); }
.about2 a { color: rgba(190, 206, 255, 0.75); text-decoration: none; border-bottom: 1px solid rgba(190, 206, 255, 0.25); transition: color 0.25s ease; }
.about2 a:hover { color: #cdd9ff; }
.about2 .trust2 {
  margin-top: 14px; display: inline-flex; align-items: center; gap: 8px;
  font-size: 12px; letter-spacing: 0.12em; color: var(--fg3);
}
.about2 .trust2 .shield { color: var(--fg2); }

/* ---- 下载页 / 更新说明页 ---- */
.dl-cta.flat { border-top: none; padding-top: 40px; }
.dl-icon { display: flex; justify-content: center; margin-bottom: 22px; }
.dl-icon img { border-radius: 18px; box-shadow: 0 0 0 1px var(--line), 0 18px 44px rgba(0, 0, 0, 0.45); }
.dl-cta .dl-h1,
.dl-cta h2 {
  font-size: clamp(26px, 3.6vw, 40px); font-weight: 700; letter-spacing: 0.12em;
}
.dl-cta .dl-h1 .en,
.dl-cta h2 .en {
  font-family: var(--lat); font-weight: 500; font-size: 0.52em;
  letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--fg3); margin-left: 14px;
}
.coming { cursor: default; opacity: 0.72; }
.coming .go { pointer-events: none; }
.dl-sub2 { margin-top: 16px; font-size: 12px; letter-spacing: 0.12em; color: var(--fg4); }
.dl-sub2 a { color: var(--fg3); text-decoration: underline; text-underline-offset: 4px; }
.dl-sub2 a:hover { color: var(--fg); }
.trust2 {
  margin-top: 22px; display: inline-flex; align-items: center; gap: 8px;
  font-size: 12px; letter-spacing: 0.12em; color: var(--fg3);
}
.trust2 .shield { color: var(--fg2); }
.back-line { margin-top: 30px; font-size: 12px; letter-spacing: 0.12em; }
.back-line a { color: var(--fg3); text-decoration: none; }
.back-line a:hover { color: var(--fg); }

.log-list { padding-bottom: 72px; }
.log-entry { padding: 30px 0 34px; border-top: 1px solid var(--line); }
.log-head { display: flex; align-items: baseline; gap: 18px; flex-wrap: wrap; }
.log-ver { font-size: 22px; font-weight: 700; letter-spacing: 0.06em; }
.log-date { font-size: 12px; letter-spacing: 0.14em; color: var(--fg3); }
.log-items { margin-top: 16px; list-style: none; }
.log-items li {
  font-size: 13.5px; font-weight: 300; color: var(--fg2);
  letter-spacing: 0.06em; line-height: 2; padding-left: 16px; position: relative;
}
.log-items li::before {
  content: ''; position: absolute; left: 2px; top: 0.85em;
  width: 3px; height: 3px; border-radius: 50%;
  background: rgba(255, 255, 255, 0.55);
}

/* ---- 价格双卡 + 早鸟条 ---- */
.pay-cards {
  margin-top: 30px;
  display: flex; justify-content: center; gap: 16px; flex-wrap: wrap;
}
.pay-card {
  position: relative;
  min-width: 200px; padding: 22px 28px 18px;
  border: 1px solid var(--line); border-radius: 4px;
  background: var(--surface); text-align: center;
}
.pay-card.hot {
  border-color: rgba(180, 200, 255, 0.28);
  box-shadow: 0 0 32px rgba(160, 190, 255, 0.08);
}
.pc-tag {
  position: absolute; top: -9px; left: 50%; transform: translateX(-50%);
  padding: 2px 12px; background: #0a0a0a; color: #fff;
  font-size: 10px; font-weight: 600; letter-spacing: 0.3em;
}
.pc-name { font-size: 13px; letter-spacing: 0.2em; color: var(--fg3); }
.pc-num {
  margin-top: 8px;
  font-family: var(--lat);
  font-size: 30px; font-weight: 700; letter-spacing: 0.04em;
}
.pc-num small { font-size: 12px; font-weight: 500; color: var(--fg3); letter-spacing: 0.1em; margin-left: 4px; }
.pc-desc { margin-top: 8px; font-size: 12px; letter-spacing: 0.08em; color: var(--fg2); }
.early-bird {
  margin-top: 20px; font-size: 12.5px; letter-spacing: 0.1em; color: var(--fg3);
}
.early-bird b { color: var(--fg); font-weight: 600; }
.early-bird span { opacity: 0.6; margin-left: 10px; }

/* ===== 浅色子页（download / changelog）：对齐 desk 白底体系 ===== */
body.site.theme-light {
  --bg: #ffffff;
  --fg: #0a0a0a;
  --fg2: #444444;
  --fg3: #888888;
  --fg4: #aaaaaa;
  --line: rgba(10, 10, 10, 0.08);
  --line2: rgba(10, 10, 10, 0.14);
  --surface: #f7f7f7;
  --surface2: #f0f0f0;
  --accent: #2f5bff; /* 仅保留给 .live-dot「已上线」语义 */
  color-scheme: light;
  background: #fff;
  color: #0a0a0a;
}
html:has(body.theme-light) {
  background: #fff;
  color-scheme: light;
}
body.theme-light .nav {
  background: rgba(255, 255, 255, 0.9);
  border-bottom-color: rgba(10, 10, 10, 0.08);
}
body.theme-light .nav .logo .name { font-weight: 700; }
body.theme-light .cta {
  border-color: #0a0a0a;
  background: #0a0a0a;
  color: #fff;
  border-radius: 10px;
  letter-spacing: 0.18em;
}
body.theme-light .cta:hover {
  background: #fff;
  color: #0a0a0a;
}
body.theme-light .cta .arrow { color: inherit; }
body.theme-light a:focus-visible,
body.theme-light button:focus-visible {
  outline-color: #0a0a0a;
}
body.theme-light .site-footer {
  background: #0a0a0a;
  color: #fff;
  --fg: #fff;
  --fg2: rgba(255, 255, 255, 0.78);
  --fg3: rgba(255, 255, 255, 0.45);
  --fg4: rgba(255, 255, 255, 0.28);
  --line: rgba(255, 255, 255, 0.1);
}
body.theme-light .dl-icon img {
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.1);
  border-radius: 20px;
}
body.theme-light .page-kicker { color: #888; font-weight: 500; }
body.theme-light .page-kicker::before { background: rgba(10, 10, 10, 0.35); }
body.theme-light .page-title { font-weight: 700; letter-spacing: 0.08em; }
body.theme-light .page-lead {
  font-weight: 400;
  letter-spacing: 0.04em;
  line-height: 1.75;
  color: #444;
}
body.theme-light .log-items li {
  font-weight: 400;
  letter-spacing: 0.04em;
  line-height: 1.85;
  color: #444;
}
body.theme-light .log-items li::before {
  background: #0a0a0a;
}
body.theme-light .log-ver { letter-spacing: 0.04em; }
body.theme-light .pay-card.hot {
  border-color: rgba(10, 10, 10, 0.2);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
}
body.theme-light .sky-soft { display: none; }