:root{
  --bg:#0a0e1a; --bg2:#0f1626; --card:#141d33; --line:#1f2d4d;
  --text:#e6edf7; --muted:#8da2c0; --brand:#2de2c4; --brand2:#3b82f6;
  --danger:#ff5d6c; --radius:14px;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,"Segoe UI","Microsoft YaHei",Roboto,Helvetica,Arial,sans-serif;
  background:radial-gradient(1200px 600px at 70% -10%,rgba(59,130,246,.15),transparent),
             radial-gradient(900px 500px at 10% 10%,rgba(45,226,196,.12),transparent),var(--bg);
  color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:var(--brand);text-decoration:none}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
header.nav{display:flex;align-items:center;justify-content:space-between;padding:18px 0;border-bottom:1px solid var(--line)}
.nav-links{display:flex;align-items:center;gap:16px}
.nav-links a{color:var(--text);text-decoration:none;font-size:14px;transition:.2s}
.nav-links a:hover{color:var(--brand)}
.logo{font-weight:800;font-size:20px;letter-spacing:.5px}
.logo b{color:var(--brand)}
.btn{display:inline-block;padding:10px 18px;border-radius:10px;border:1px solid var(--brand);
  color:var(--brand);background:transparent;cursor:pointer;font-size:14px;transition:.2s}
.btn:hover{background:var(--brand);color:#04121a}
.btn.primary{background:linear-gradient(90deg,var(--brand),var(--brand2));color:#04121a;border:none;font-weight:700}
.btn.primary:hover{filter:brightness(1.08)}
.hero{padding:70px 0 50px;text-align:center}
.hero h1{font-size:40px;line-height:1.25;margin-bottom:16px}
.hero h1 .accent{background:linear-gradient(90deg,var(--brand),var(--brand2));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{color:var(--muted);font-size:18px;max-width:720px;margin:0 auto 28px}
.features{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;padding:30px 0}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.card .ic{font-size:28px}
.card h3{margin:10px 0 6px;font-size:17px}
.card p{color:var(--muted);font-size:14px}
section.block{padding:46px 0;border-top:1px solid var(--line)}
.section-title{font-size:26px;text-align:center;margin-bottom:8px}
.section-sub{color:var(--muted);text-align:center;margin-bottom:30px}
.contact{display:grid;grid-template-columns:1.1fr .9fr;gap:24px}
.contact .info{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.contact .info .row{display:flex;gap:12px;align-items:center;padding:12px 0;border-bottom:1px dashed var(--line)}
.contact .info .row:last-child{border-bottom:none}
.contact .info .row .k{color:var(--muted);min-width:64px}
.qr{width:160px;height:160px;object-fit:cover;border-radius:10px;background:#fff;padding:6px}
form.lead input,form.lead textarea{width:100%;padding:12px 14px;margin-bottom:14px;border-radius:10px;
  border:1px solid var(--line);background:var(--bg2);color:var(--text);font-size:15px}
form.lead textarea{resize:vertical;min-height:110px}
form.lead label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px}
.ok{background:rgba(45,226,196,.12);border:1px solid var(--brand);color:var(--brand);padding:12px 14px;border-radius:10px;margin-bottom:14px}
.err{background:rgba(255,93,108,.12);border:1px solid var(--danger);color:var(--danger);padding:12px 14px;border-radius:10px;margin-bottom:14px}
footer{padding:30px 0;color:var(--muted);text-align:center;font-size:13px;border-top:1px solid var(--line)}
@media(max-width:860px){.features{grid-template-columns:1fr 1fr}.contact{grid-template-columns:1fr}.hero h1{font-size:30px}}

/* 后台 */
.admin-wrap{max-width:960px;margin:30px auto;padding:0 18px}
.admin-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px}
.field input[type=text],.field input[type=password],.field input[type=url],.field textarea{
  width:100%;padding:10px 12px;border-radius:9px;border:1px solid var(--line);background:var(--bg2);color:var(--text)}
.tabs{display:flex;gap:8px;margin-bottom:18px;flex-wrap:wrap}
.tabs a{padding:8px 14px;border-radius:9px;border:1px solid var(--line);color:var(--muted)}
.tabs a.active{color:var(--brand);border-color:var(--brand)}
table.data{width:100%;border-collapse:collapse;font-size:14px}
table.data th,table.data td{padding:10px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
table.data th{color:var(--muted);font-weight:600}
.muted{color:var(--muted);font-size:13px}
.center{text-align:center}
.tag{display:inline-block;padding:2px 8px;border-radius:20px;background:rgba(45,226,196,.15);color:var(--brand);font-size:12px}

/* 电话一键拨号 */
.contact .info .row .tel{color:var(--brand);text-decoration:none;cursor:pointer;word-break:break-all}
.contact .info .row .tel:hover{opacity:.85}

/* 微信号一键复制 */
.contact .info .row .wx-val{flex:1;word-break:break-all}
.contact .info .row .btn-copy{
  flex:0 0 auto;border:1px solid var(--brand);background:transparent;
  color:var(--brand);padding:5px 14px;border-radius:8px;
  font-size:13px;line-height:1.4;cursor:pointer;transition:.2s;-webkit-tap-highlight-color:transparent;
}
.contact .info .row .btn-copy:hover,.contact .info .row .btn-copy:active{background:var(--brand);color:#04121a}
@media (max-width:600px){
  .contact .info .row .btn-copy{padding:7px 16px;font-size:14px}
}

/* 产品截图画廊 */
.gallery{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px;padding:10px 0}
.gallery .shot{display:block;margin:0;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;cursor:pointer;transition:.25s}
.gallery .shot:hover{transform:translateY(-4px);border-color:var(--brand);box-shadow:0 12px 30px rgba(45,226,196,.12)}
.gallery .shot .shot-thumb{position:relative;overflow:hidden;background:#0f1626}
.gallery .shot .shot-thumb img{display:block;width:100%;height:200px;object-fit:cover;transition:.35s;pointer-events:none;-webkit-user-drag:none;user-select:none}
.gallery .shot:hover .shot-thumb img{transform:scale(1.06)}
.gallery .shot .shot-hint{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,.45);color:#fff;font-size:14px;opacity:0;transition:.25s;pointer-events:none}
.gallery .shot:hover .shot-hint{opacity:1}
.gallery .shot figcaption{padding:12px 16px;font-size:14px;color:var(--muted);border-top:1px solid var(--line)}
.gallery .shot-thumb{cursor:pointer}
@media (max-width:600px){
  .gallery{grid-template-columns:1fr;gap:14px}
  .gallery .shot .shot-thumb img{height:160px}
}

/* 灯箱 */
.lightbox{display:none;position:fixed;inset:0;background:rgba(0,0,0,.88);z-index:9999;align-items:center;justify-content:center;flex-direction:column;padding:20px}
.lightbox.active{display:flex}
.lightbox .lb-img{max-width:92vw;max-height:82vh;object-fit:contain;border-radius:10px;box-shadow:0 20px 60px rgba(0,0,0,.5);animation:lbFade .25s ease}
@keyframes lbFade{from{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}
.lightbox .lb-caption{color:#e6edf7;margin-top:14px;font-size:14px;text-align:center;max-width:90vw}
.lightbox .lb-close{position:absolute;top:20px;right:28px;color:#fff;font-size:42px;line-height:1;cursor:pointer;user-select:none;opacity:.7;transition:.2s}
.lightbox .lb-close:hover{opacity:1}
.lightbox .lb-prev,.lightbox .lb-next{position:absolute;top:50%;transform:translateY(-50%);color:#fff;font-size:48px;line-height:1;cursor:pointer;user-select:none;opacity:.6;transition:.2s;padding:0 20px}
.lightbox .lb-prev:hover,.lightbox .lb-next:hover{opacity:1}
.lightbox .lb-prev{left:10px}
.lightbox .lb-next{right:10px}
@media (max-width:600px){
  .lightbox .lb-img{max-width:96vw;max-height:75vh}
  .lightbox .lb-close{font-size:32px;top:12px;right:16px}
  .lightbox .lb-prev,.lightbox .lb-next{font-size:34px;padding:0 10px}
}

/* 后台截图管理 */
.shot-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:18px;margin-top:10px}
.shot-item{background:var(--bg2);border:1px solid var(--line);border-radius:10px;overflow:hidden}
.shot-item img{display:block;width:100%;height:200px;object-fit:cover;background:#0f1626}
.shot-item .shot-thumb-img{cursor:pointer;transition:.25s;pointer-events:auto}
.shot-item .shot-thumb-img:hover{transform:scale(1.02);filter:brightness(1.05)}
.shot-meta{padding:12px 14px}
.shot-name{font-size:12px;color:var(--muted);margin-bottom:10px;word-break:break-all}
.shot-desc-form{display:flex;gap:8px;margin-bottom:8px;align-items:center;flex-wrap:wrap}
.shot-desc-form input[type=text]{flex:1;padding:7px 10px;border-radius:7px;border:1px solid var(--line);background:var(--card);color:var(--text);font-size:13px;min-width:120px}
.shot-item form{margin:0}
.shot-actions{display:flex;gap:6px;flex-wrap:wrap;margin-top:4px}
@media (max-width:600px){
  .shot-list{grid-template-columns:1fr}
}

/* 版本更新 */
.changelog-list{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.changelog-item{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.2s}
.changelog-head{display:flex;align-items:center;gap:12px;padding:16px 20px;cursor:pointer;user-select:none;transition:.2s}
.changelog-head:hover{background:rgba(45,226,196,.06)}
.changelog-head::after{content:'▸';margin-left:auto;color:var(--muted);font-size:14px;transition:transform .25s}
.changelog-item.open .changelog-head::after{transform:rotate(90deg)}
.changelog-ver{font-weight:800;font-size:15px;color:var(--brand)}
.changelog-date{color:var(--muted);font-size:13px}
.changelog-tag{display:inline-block;padding:2px 10px;border-radius:20px;font-size:12px;font-weight:600;margin-left:4px}
.changelog-tag.tag-optimize{background:rgba(59,130,246,.15);color:#60a5fa}
.changelog-tag.tag-feature{background:rgba(45,226,196,.15);color:var(--brand)}
.changelog-tag.tag-arch{background:rgba(255,93,108,.15);color:var(--danger)}
.changelog-body{max-height:0;overflow:hidden;transition:max-height .35s ease;padding:0 20px}
.changelog-item.open .changelog-body{max-height:600px;padding:4px 20px 20px}
.changelog-body p{color:var(--text);margin:6px 0 10px}
.changelog-body ul{padding-left:20px}
.changelog-body li{color:var(--muted);margin-bottom:5px;font-size:14px}
@media (max-width:600px){
  .changelog-head{flex-wrap:wrap;gap:8px}
  .changelog-head::after{margin-left:0}
  .changelog-tag{margin-left:0}
}

/* ---------- 程序下载 ---------- */
.pkg-list{display:flex;flex-direction:column;gap:14px}
.pkg-card{
  display:flex;align-items:center;gap:18px;
  background:var(--card);border:1px solid var(--line);border-radius:14px;
  padding:22px 24px;transition:.25s;
}
.pkg-card:hover{border-color:var(--brand);box-shadow:0 6px 24px rgba(10,119,255,.08);transform:translateY(-1px)}
.pkg-icon{font-size:38px;flex-shrink:0;width:56px;height:56px;display:flex;align-items:center;justify-content:center;background:rgba(10,119,255,.12);border-radius:12px}
.pkg-info{flex:1;min-width:0}
.pkg-title{font-size:17px;font-weight:700;margin-bottom:6px}
.pkg-meta{display:flex;gap:14px;flex-wrap:wrap;font-size:13px;color:var(--muted,#8a99b3);margin-bottom:6px}
.pkg-ver{color:var(--brand);font-weight:600;background:rgba(10,119,255,.12);padding:2px 10px;border-radius:6px}
.pkg-desc{color:var(--muted,#8a99b3);font-size:13px;line-height:1.5}
.pkg-download{
  display:inline-flex;align-items:center;gap:8px;
  background:linear-gradient(135deg,var(--brand),#0a5fff);
  color:#fff;padding:12px 22px;border-radius:10px;font-weight:600;
  text-decoration:none;transition:.25s;flex-shrink:0;white-space:nowrap;
}
.pkg-download:hover{transform:translateY(-1px);box-shadow:0 6px 18px rgba(10,119,255,.3)}
.pkg-download .dl-icon{font-size:16px}
@media (max-width:600px){
  .pkg-card{flex-direction:column;text-align:left;padding:18px}
  .pkg-icon{width:48px;height:48px;font-size:30px}
  .pkg-download{width:100%;justify-content:center;margin-top:8px}
}