/* ===== 产品展示站 · 前台样式（自研，无外部依赖） ===== */
:root{
  --bg:#f7f8fc; --surface:#ffffff; --text:#1f2333; --muted:#6b7185;
  --line:#e7e9f3; --brand:#6366f1; --brand2:#8b5cf6; --brand-grad:linear-gradient(135deg,#6366f1,#8b5cf6);
  --shadow:0 10px 30px rgba(31,35,51,.08); --radius:16px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg); color:var(--text); line-height:1.65; -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:1120px;margin:0 auto;padding:0 20px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:11px 20px;border-radius:10px;font-weight:600;font-size:14px;cursor:pointer;border:1px solid transparent;transition:.18s}
.btn-primary{background:var(--brand-grad);color:#fff}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 8px 20px rgba(99,102,241,.35)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--text)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}

/* 导航 */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.85);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px}
.brand .logo{width:34px;height:34px;border-radius:9px;background:var(--brand-grad);display:grid;place-items:center;color:#fff;font-weight:800;overflow:hidden}
.brand .logo img{width:100%;height:100%;object-fit:cover}
.nav a.admin{color:var(--muted);font-size:14px}
.nav a.admin:hover{color:var(--brand)}

/* Hero */
.hero{padding:64px 0 36px;text-align:center}
.hero h1{font-size:42px;line-height:1.2;margin:0 0 14px;letter-spacing:-.5px}
.hero h1 .accent{background:var(--brand-grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{max-width:620px;margin:0 auto;color:var(--muted);font-size:17px}
.hero .actions{margin-top:26px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

.section-title{display:flex;align-items:baseline;justify-content:space-between;margin:18px 0 22px}
.section-title h2{font-size:24px;margin:0}
.section-title .count{color:var(--muted);font-size:14px}

/* APP 网格：卡片按内容高度，不强制拉伸 */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:20px;padding-bottom:40px;align-items:start}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;transition:.2s;display:flex;flex-direction:column;gap:12px}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:transparent}
.grid .card{padding:18px;gap:10px}
.card .top{display:flex;gap:12px;align-items:center}
.app-icon{width:56px;height:56px;border-radius:14px;flex:0 0 auto;display:grid;place-items:center;color:#fff;font-weight:800;font-size:22px;background:var(--brand-grad);overflow:hidden;box-shadow:0 6px 16px rgba(99,102,241,.3)}
.app-icon img{width:100%;height:100%;object-fit:cover}
.card h3{margin:0;font-size:17px}
.tag{display:inline-block;font-size:11px;color:var(--brand);background:rgba(99,102,241,.1);padding:2px 8px;border-radius:999px;font-weight:600}
.card .tagline{color:var(--muted);font-size:13.5px;line-height:1.55;margin:0}
.card .more{margin-top:2px;color:var(--brand);font-weight:600;font-size:13px}

/* 详情页 */
.detail{padding:20px 0 40px}
.detail-wrap{max-width:780px;margin:0 auto}
.back{color:var(--muted);font-size:14px;display:inline-block;margin-bottom:12px}
.back:hover{color:var(--brand)}

/* 首页应用展示区：与导航/Hero 同宽，铺满主内容区（不收窄居中） */
#apps{max-width:1120px;margin:0 auto}

/* 详情页：左列 图标→版本号+简介→二维码，右列 应用名+分类→下载→关于本应用；截图定高横滑 */
.app-detail{text-align:left;padding:22px 22px 20px}
.detail-head{
  display:grid;
  grid-template-columns:300px 1fr;
  grid-template-areas:
    "icon   info"
    "meta   download"
    "qr     about";
  gap:16px 24px;
  align-items:start;
}
.detail-icon-cell{grid-area:icon;display:flex;justify-content:center}
.detail-meta-cell{grid-area:meta;display:flex;flex-direction:column;align-items:center;text-align:center;gap:6px;margin-top:6px}
.detail-meta-cell .hero-meta{justify-content:center;margin:0}
.detail-meta-cell .hero-tagline{margin:0}
.app-detail .hero-icon{margin:0}
.detail-icon{width:104px;height:104px;border-radius:24px;background:var(--brand-grad);display:grid;place-items:center;color:#fff;font-weight:800;font-size:42px;overflow:hidden;box-shadow:0 12px 28px rgba(99,102,241,.32)}
.detail-icon img{width:100%;height:100%;object-fit:cover}
.detail-about-cell{grid-area:about;display:flex}
.detail-about{width:100%;text-align:left;margin-top:4px;padding-top:14px;border-top:1px solid var(--line)}
.detail-about h3{margin:0 0 8px;font-size:16px;text-align:left}
.detail-desc{white-space:pre-line;color:#3a3f52;font-size:14px;line-height:1.65}
.detail-qr-cell{grid-area:qr;display:flex;justify-content:center;margin-top:4px}
.app-qr{display:flex;flex-direction:column;align-items:center;gap:6px}
.app-qr canvas,.app-qr img{display:block;border-radius:8px;width:110px;height:110px}
.app-qr-cap{color:var(--muted);font-size:12px;margin:0}
.detail-info-cell{grid-area:info;display:flex;flex-direction:column;justify-content:center;min-height:104px}
.app-name{margin:0;font-size:23px;line-height:1.2}
.hero-meta{display:flex;gap:8px;align-items:center;justify-content:flex-start;flex-wrap:wrap;margin:6px 0 0}
.hero-meta .ver{color:var(--muted);font-size:13px}
.hero-tagline{color:var(--muted);font-size:14px;margin:8px 0 0;max-width:none}
.detail-download-cell{grid-area:download;display:flex;align-items:center}
.download{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-start}
.store-btn{padding:9px 13px;border:none;border-radius:10px;background:#11131f;color:#fff;font-weight:600;font-size:13px;font-family:inherit;cursor:pointer;display:inline-flex;align-items:center;gap:8px;box-shadow:0 5px 14px rgba(17,19,31,.2);transition:.18s}
.store-btn:hover{background:#000;transform:translateY(-1px);box-shadow:0 9px 20px rgba(17,19,31,.28)}
.store-btn.active{background:var(--brand-grad);box-shadow:0 5px 14px rgba(99,102,241,.4)}
.download-tip{color:var(--muted);font-size:12px;margin:8px 0 0}
.app-shots{margin-top:14px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:14px}
.app-shots h3{font-size:16px;margin:0 0 10px;text-align:left}
/* 截图网格：按原始比例完整显示（不裁切），数量多时自动换行（不再单行横滑），无圆角 */
.shot-grid{display:flex;flex-wrap:wrap;gap:10px;padding-bottom:4px}
.shot{flex:0 0 auto;height:320px;width:auto;max-width:300px;overflow:hidden;background:#eef0f8;box-shadow:var(--shadow);display:flex;align-items:center;justify-content:center}
.shot img{display:block;max-width:100%;max-height:100%;width:auto;height:auto;object-fit:contain}
.shot-empty{color:var(--muted);font-size:14px;padding:24px 0}

/* 页脚 */
.footer{background:var(--surface);border-top:1px solid var(--line);padding:40px 0;margin-top:20px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:30px}
.footer h4{margin:0 0 12px;font-size:15px}
.footer p,.footer a{color:var(--muted);font-size:14px;margin:4px 0}
.footer a:hover{color:var(--brand)}
.footer .copy{grid-column:1/-1;border-top:1px solid var(--line);margin-top:18px;padding-top:18px;color:var(--muted);font-size:13px}

.empty-state{text-align:center;padding:70px 0;color:var(--muted)}

/* 响应式 */
@media(max-width:820px){
  .app-detail{padding:20px 16px 18px}
  .footer-grid{grid-template-columns:1fr}
  .hero h1{font-size:32px}
}
@media(max-width:700px){
  .detail-head{
    grid-template-columns:1fr;
    grid-template-areas:
      "icon"
      "info"
      "meta"
      "download"
      "qr"
      "about";
    gap:14px;
  }
  .detail-icon-cell,.detail-info-cell,.detail-meta-cell,.detail-download-cell,.detail-about-cell,.detail-qr-cell{display:flex;align-items:center;justify-content:center;text-align:center}
  .detail-about-cell{text-align:left}
  .detail-about{text-align:left}
  .hero-meta,.download{justify-content:center}
}
@media(max-width:600px){
  .app-shots{padding:14px}
}