/* AI先行者软件中心 —— 样式（无外部依赖，不引用任何 CDN） */

:root {
  --bg: #f5f6f8;
  --card: #ffffff;
  --line: #e6e8ec;
  --line-2: #eff1f4;
  --ink: #1b1f26;
  --ink-2: #5b6472;
  --ink-3: #8b93a1;
  --brand: #2f5bff;
  --brand-dark: #1f45d8;
  --brand-soft: #eef2ff;
  --ok: #16a34a;
  --warn-bg: #fff8e6;
  --warn-line: #f5d99a;
  --warn-ink: #8a5a00;
  --radius: 16px;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.7 -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", sans-serif;
}

a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

/* ---------- 顶栏 ---------- */
.topbar {
  position: sticky; top: 0; z-index: 20;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.topbar-in { display: flex; align-items: center; justify-content: space-between; height: 62px; }

.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); }
.brand:hover { text-decoration: none; }
.brand-mark {
  width: 34px; height: 34px; border-radius: 11px;
  background: linear-gradient(140deg, #4a76ff, #2f5bff 55%, #1f45d8);
  color: #fff; font-weight: 700; font-size: 14px;
  display: flex; align-items: center; justify-content: center;
  letter-spacing: .5px;
}
.brand-name { font-weight: 650; font-size: 16.5px; }

.nav { display: flex; gap: 22px; }
.nav a { color: var(--ink-2); font-size: 14px; }
.nav a:hover { color: var(--brand); text-decoration: none; }

/* ---------- Hero ---------- */
.hero { padding: 46px 0 34px; }
.hero h1 { margin: 0 0 10px; font-size: 34px; line-height: 1.25; letter-spacing: -.5px; }
.hero-sub { margin: 0 0 18px; font-size: 16px; color: var(--ink-2); }
.hero-chips { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; }
.hero-chips li {
  font-size: 13px; color: var(--ink-2);
  background: #fff; border: 1px solid var(--line);
  padding: 5px 12px; border-radius: 999px;
}
.mobile-hint {
  display: none;
  margin: 18px 0 0; padding: 12px 14px;
  background: var(--warn-bg); border: 1px solid var(--warn-line);
  border-radius: 12px; color: var(--warn-ink); font-size: 14px;
}

/* ---------- 区块标题 ---------- */
.sec-head { display: flex; align-items: baseline; gap: 14px; margin: 34px 0 16px; }
.sec-head h2 { margin: 0; font-size: 20px; padding-left: 12px; border-left: 4px solid var(--brand); line-height: 1.2; }
.sec-note { margin: 0; font-size: 13px; color: var(--ink-3); }

/* ---------- 软件卡片 ---------- */
.app {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px; display: grid; grid-template-columns: 1fr 300px; gap: 30px;
  box-shadow: 0 1px 2px rgba(16, 24, 40, .03);
}
.app-body { min-width: 0; }
.app-head { display: flex; align-items: center; gap: 14px; margin-bottom: 12px; }
.app-logo {
  width: 46px; height: 46px; flex: 0 0 46px; border-radius: 13px;
  background: var(--brand-soft); color: var(--brand);
  font-size: 20px; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
}
.app-head h3 { margin: 0; font-size: 21px; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.ver {
  font-size: 12px; font-weight: 600; color: var(--brand);
  background: var(--brand-soft); border-radius: 999px; padding: 2px 9px;
}
.app-en { margin: 2px 0 0; font-size: 12.5px; color: var(--ink-3); }

.app-summary { margin: 0 0 14px; color: var(--ink-2); }
.app-tags { list-style: none; display: flex; flex-wrap: wrap; gap: 7px; margin: 0 0 20px; padding: 0; }
.app-tags li {
  font-size: 12.5px; color: var(--ink-2); background: #f7f8fa;
  border: 1px solid var(--line-2); padding: 3px 10px; border-radius: 999px;
}

.app-actions { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  font: inherit; font-size: 15px; font-weight: 600; line-height: 1;
  padding: 12px 22px; border-radius: 11px; border: 1px solid transparent;
  cursor: pointer; transition: .15s ease; white-space: nowrap;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn.primary { background: var(--brand); color: #fff; box-shadow: 0 6px 16px rgba(47, 91, 255, .22); }
.btn.primary:hover { background: var(--brand-dark); }
.btn.ghost { background: #fff; color: var(--ink-2); border-color: var(--line); }
.btn.ghost:hover { color: var(--brand); border-color: #c9d4ff; }
.btn.tiny { font-size: 12.5px; padding: 6px 12px; border-radius: 8px; background: #fff; border-color: var(--line); color: var(--ink-2); }
.btn.ok { background: #e9f8ee !important; color: var(--ok) !important; border-color: #b9e6c8 !important; }

.app-meta { margin: 14px 0 0; font-size: 13px; color: var(--ink-3); }

.app-cover img {
  width: 100%; display: block; border-radius: 13px;
  border: 1px solid var(--line); background: #fafbfc;
  aspect-ratio: 1 / 1; object-fit: cover;
}

/* ---------- 详情 ---------- */
.app-detail {
  background: var(--card); border: 1px solid var(--line); border-top: none;
  border-radius: 0 0 var(--radius) var(--radius);
  margin-top: -1px;
}
.app-detail > summary {
  cursor: pointer; padding: 15px 26px; font-weight: 600; color: var(--ink-2);
  font-size: 14.5px; list-style: none; display: flex; align-items: center; gap: 8px;
}
.app-detail > summary::-webkit-details-marker { display: none; }
.app-detail > summary::before {
  content: "＋"; color: var(--brand); font-weight: 700;
}
.app-detail[open] > summary::before { content: "－"; }
.app-detail[open] > summary { border-bottom: 1px solid var(--line-2); }
.detail-wrap { padding: 24px 26px 28px; }
.detail-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 34px; }

h4 { margin: 22px 0 10px; font-size: 14px; color: var(--ink); }
h4:first-child { margin-top: 0; }

ul.ticks { list-style: none; margin: 0; padding: 0; }
ul.ticks li { position: relative; padding-left: 24px; margin-bottom: 8px; color: var(--ink-2); }
ul.ticks li::before {
  content: "✓"; position: absolute; left: 0; top: 0;
  color: var(--brand); font-weight: 700;
}

.specs { border: 1px solid var(--line-2); border-radius: 12px; overflow: hidden; }
.spec { display: flex; gap: 12px; padding: 9px 14px; border-bottom: 1px solid var(--line-2); font-size: 14px; }
.spec:last-child { border-bottom: none; }
.spec dt { flex: 0 0 52px; color: var(--ink-3); margin: 0; }
.spec dd { margin: 0; color: var(--ink-2); }

ol.steps { margin: 0; padding-left: 20px; color: var(--ink-2); }
ol.steps li { margin-bottom: 8px; }

.dl-list { list-style: none; margin: 0; padding: 0; font-size: 14px; }
.dl-list li { margin-bottom: 8px; color: var(--ink-2); overflow-wrap: anywhere; }
.dl-list code { background: #f3f4f7; padding: 1px 6px; border-radius: 6px; font-size: 13px; }

.hash { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.hash code {
  background: #f3f4f7; border: 1px solid var(--line-2); border-radius: 9px;
  padding: 8px 11px; font-size: 12.5px; overflow-wrap: anywhere; flex: 1 1 260px;
  font-family: ui-monospace, SFMono-Regular, Consolas, "Courier New", monospace;
}
.hint { margin: 8px 0 0; font-size: 12.5px; color: var(--ink-3); }
ul.notes { margin: 0; padding-left: 20px; color: var(--ink-2); font-size: 14px; }
ul.notes li { margin-bottom: 7px; }

.shots { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.shots figure { margin: 0; }
.shots img { width: 100%; display: block; border-radius: 11px; border: 1px solid var(--line); }
.shots figcaption { margin-top: 6px; font-size: 12.5px; color: var(--ink-3); }

/* ---------- 常见问题 ---------- */
.qa {
  background: var(--card); border: 1px solid var(--line); border-radius: 13px;
  margin-bottom: 10px;
}
.qa > summary {
  cursor: pointer; padding: 15px 20px; font-weight: 600; font-size: 15px;
  list-style: none; display: flex; justify-content: space-between; gap: 12px;
}
.qa > summary::-webkit-details-marker { display: none; }
.qa > summary::after { content: "▾"; color: var(--ink-3); font-weight: 400; }
.qa[open] > summary::after { content: "▴"; }
.qa-body { padding: 0 20px 16px; color: var(--ink-2); }
.qa-body p { margin: 0 0 8px; }

/* ---------- 关于 ---------- */
.card { background: var(--card); border: 1px solid var(--line); border-radius: 13px; padding: 22px 24px; }
.about-card { color: var(--ink-2); }
.about-card > p:first-child { margin-top: 0; }
.about-list { margin: 0 0 14px; padding-left: 20px; }
.about-list li { margin-bottom: 7px; }
.about-contact { margin: 0; font-size: 14px; }

/* ---------- 页脚 ---------- */
.footer { margin-top: 46px; border-top: 1px solid var(--line); background: #fff; }
.footer-in {
  display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap;
  padding: 20px; font-size: 13px; color: var(--ink-3);
}
.footer-right { display: flex; gap: 14px; flex-wrap: wrap; }
.dot { color: var(--line); }

/* ---------- 图片灯箱（本页放大） ---------- */
.zoomable { cursor: zoom-in; }

.lightbox {
  position: fixed; inset: 0; z-index: 100;
  display: none; overflow: auto;
  padding: 64px 24px 72px;
  background: rgba(12, 14, 18, .88);
  -webkit-overflow-scrolling: touch;
}
.lightbox.on { display: block; text-align: center; }
.lightbox img {
  display: inline-block; vertical-align: top;
  max-width: min(1100px, 94vw); height: auto;
  border-radius: 12px; background: #fff;
  box-shadow: 0 24px 70px rgba(0, 0, 0, .5);
}
.lightbox .lb-close {
  position: fixed; top: 14px; right: 16px; z-index: 2;
  width: 42px; height: 42px; border: 0; border-radius: 50%;
  background: rgba(255, 255, 255, .16); color: #fff;
  font-size: 24px; line-height: 1; cursor: pointer;
}
.lightbox .lb-close:hover { background: rgba(255, 255, 255, .3); }
.lightbox .lb-cap {
  position: fixed; left: 0; right: 0; bottom: 0;
  padding: 26px 20px 14px; text-align: center;
  font-size: 13px; color: #dfe3ea;
  background: linear-gradient(transparent, rgba(0, 0, 0, .72));
  pointer-events: none;
}
body.lb-open { overflow: hidden; }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .app { grid-template-columns: 1fr; padding: 20px; gap: 20px; }
  .app-cover { order: -1; }
  .detail-grid { grid-template-columns: 1fr; gap: 0; }
  .detail-wrap { padding: 20px; }
  .hero { padding: 32px 0 24px; }
  .hero h1 { font-size: 26px; }
}
@media (max-width: 640px) {
  .mobile-hint { display: block; }
  .nav { display: none; }
  .shots { grid-template-columns: 1fr; }
  .app-actions .btn { width: 100%; }
}