*{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#050914;
  --bg2:#0a1220;
  --surface:rgba(10,16,30,.78);
  --surface-strong:rgba(11,18,34,.94);
  --border:rgba(148,163,184,.16);
  --border-strong:rgba(96,165,250,.38);
  --text:#eaf2ff;
  --text2:#94a6c2;
  --muted:#64748b;
  --accent:#60a5fa;
  --accent2:#8b5cf6;
  --success:#22c55e;
  --warning:#fb7185;
  --radius:16px;
}

html{scroll-behavior:smooth}
body{
  margin:0;
  min-height:100vh;
  color:var(--text);
  font-family:Inter,"Microsoft YaHei UI","Microsoft YaHei",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  background:
    radial-gradient(circle at 20% 10%, rgba(96,165,250,.12), transparent 24%),
    radial-gradient(circle at 80% 0%, rgba(139,92,246,.10), transparent 22%),
    linear-gradient(180deg,var(--bg),var(--bg2));
  overflow-x:hidden;
}

.sky{
  position:fixed;
  inset:0;
  pointer-events:none;
  mix-blend-mode:screen;
}
.sky-1{
  background:
    radial-gradient(circle at 12px 18px, rgba(255,255,255,.9) 0 1px, transparent 1.7px) 0 0/120px 120px,
    radial-gradient(circle at 70px 56px, rgba(255,255,255,.55) 0 1px, transparent 1.8px) 0 0/170px 170px,
    radial-gradient(circle at 35px 95px, rgba(255,255,255,.7) 0 1px, transparent 1.8px) 0 0/220px 220px;
  opacity:.55;
  animation: drift 110s linear infinite, twinkle 8s ease-in-out infinite alternate;
}
.sky-2{
  background:
    radial-gradient(circle at 20px 30px, rgba(255,255,255,.6) 0 1px, transparent 1.8px) 0 0/90px 90px,
    radial-gradient(circle at 40px 72px, rgba(255,255,255,.45) 0 1px, transparent 1.8px) 0 0/140px 140px;
  opacity:.28;
  animation: drift 160s linear reverse infinite, twinkle 10s ease-in-out infinite alternate-reverse;
}
.sky-3{
  background:
    linear-gradient(180deg, transparent 0, rgba(96,165,250,.06) 38%, transparent 76%),
    linear-gradient(90deg, transparent 0, rgba(139,92,246,.05) 48%, transparent 76%);
  opacity:.55;
  filter:blur(.2px);
  animation: drift 200s linear infinite;
}

.starfield{
  position:fixed;
  inset:0;
  pointer-events:none;
  background-image:
    radial-gradient(circle at 8% 18%, rgba(255,255,255,.95) 0 1px, transparent 1.6px),
    radial-gradient(circle at 18% 62%, rgba(255,255,255,.65) 0 1px, transparent 1.6px),
    radial-gradient(circle at 32% 24%, rgba(255,255,255,.85) 0 1px, transparent 1.6px),
    radial-gradient(circle at 44% 78%, rgba(255,255,255,.6) 0 1px, transparent 1.6px),
    radial-gradient(circle at 63% 28%, rgba(255,255,255,.7) 0 1px, transparent 1.6px),
    radial-gradient(circle at 73% 66%, rgba(255,255,255,.85) 0 1px, transparent 1.6px),
    radial-gradient(circle at 86% 16%, rgba(255,255,255,.7) 0 1px, transparent 1.6px),
    radial-gradient(circle at 92% 58%, rgba(255,255,255,.55) 0 1px, transparent 1.6px),
    radial-gradient(circle at 24% 12%, rgba(96,165,250,.55) 0 1px, transparent 1.6px),
    radial-gradient(circle at 79% 82%, rgba(139,92,246,.45) 0 1px, transparent 1.6px);
  opacity:.6;
  animation: twinkle 7s ease-in-out infinite alternate;
}

.nebula{
  position:fixed;
  inset:0;
  pointer-events:none;
  background:
    linear-gradient(135deg, rgba(96,165,250,.08), transparent 22%, transparent 60%, rgba(139,92,246,.06) 82%, transparent),
    linear-gradient(180deg, rgba(2,6,23,.05), transparent 20%, rgba(2,6,23,.12) 58%, transparent);
  opacity:.9;
  animation: drift 220s linear infinite;
}

@keyframes drift{
  from{transform:translate3d(0,0,0)}
  to{transform:translate3d(-60px,20px,0)}
}

@keyframes twinkle{
  from{opacity:.42}
  to{opacity:.76}
}

.topbar{
  position:sticky;
  top:0;
  z-index:10;
  backdrop-filter:blur(18px);
  background:rgba(3,8,20,.62);
  border-bottom:1px solid rgba(148,163,184,.12);
}

.topbar-inner{
  width:min(1180px,calc(100% - 32px));
  margin:0 auto;
  min-height:62px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--text);
  text-decoration:none;
  font-weight:800;
  letter-spacing:.01em;
}

.brand-mark{
  width:10px;
  height:10px;
  border-radius:50%;
  background:linear-gradient(135deg,#60a5fa,#8b5cf6);
  box-shadow:0 0 18px rgba(96,165,250,.55);
}

.topnav{
  display:flex;
  align-items:center;
  gap:8px;
  flex-wrap:wrap;
}

.topnav-link{
  padding:8px 12px;
  border-radius:10px;
  border:1px solid transparent;
  color:var(--text2);
  text-decoration:none;
  font-size:13px;
}

.topnav-link:hover,.topnav-link.active{
  color:var(--text);
  border-color:rgba(96,165,250,.24);
  background:rgba(96,165,250,.08);
}

.app-shell{
  position:relative;
  z-index:1;
  width:min(1180px,calc(100% - 32px));
  margin:0 auto;
  padding:16px 0 32px;
}

.hero{
  display:block;
  padding:18px 0 14px;
}

.eyebrow,.section-eyebrow,.panel-eyebrow{
  color:var(--accent);
  text-transform:uppercase;
  letter-spacing:.14em;
  font-size:12px;
}

.hero h1{font-size:clamp(32px,5vw,54px);line-height:1;letter-spacing:.01em}

.sub{
  margin-top:10px;
  color:var(--text2);
  font-size:15px;
}

.panel{
  background:linear-gradient(180deg, rgba(14,22,38,.86), rgba(10,16,30,.92));
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:0 18px 42px rgba(2,6,23,.36);
}

.layout{
  display:block;
  margin-top:10px;
}

.panel{
  padding:18px;
}

.panel + .panel{margin-top:16px}

.flow-panel{
  max-width:780px;
  margin:16px auto 0;
}

.panel-head{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:12px;
}

.panel-head.center,.panel-note.center{text-align:center;justify-content:center}

.section-head h2,.panel-head h2{
  margin-top:4px;
  font-size:20px;
  line-height:1.2;
}

.section-note,.panel-note{
  color:var(--text2);
  font-size:13px;
  line-height:1.6;
}

.download-alert{
  color:#ff4d5f;
  text-shadow:0 0 8px rgba(255,77,95,.65), 0 0 18px rgba(255,77,95,.35);
  font-weight:700;
}

.panel-main{
  max-width:1100px;
  margin:0 auto;
}

.product-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(230px,1fr));
  gap:14px;
  margin-top:16px;
}

.product-card{
  position:relative;
  overflow:hidden;
  padding:18px;
  border-radius:14px;
  background:
    linear-gradient(180deg, rgba(13,20,36,.86), rgba(8,14,26,.96));
  border:1px solid rgba(148,163,184,.14);
  cursor:pointer;
  transition:transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}

.product-card::before{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:2px;
  background:linear-gradient(90deg, var(--accent), var(--accent2));
  opacity:0;
}

.product-card:hover{
  transform:translateY(-2px);
  border-color:rgba(96,165,250,.35);
  box-shadow:0 16px 34px rgba(2,6,23,.35);
}
.product-card:hover::before{opacity:1}

.p-name{
  font-size:18px;
  font-weight:700;
}

.p-desc{
  margin-top:10px;
  color:var(--text2);
  line-height:1.65;
  font-size:13px;
  min-height:42px;
}

.p-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  margin-top:16px;
}

.p-price{
  font-size:28px;
  font-weight:800;
  color:#a5d8ff;
}

.p-price small{font-size:14px;margin-right:2px}

.p-dl{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:8px 12px;
  border-radius:10px;
  border:1px solid rgba(96,165,250,.22);
  color:var(--accent);
  text-decoration:none;
  font-size:12px;
  background:rgba(96,165,250,.07);
}

.field{margin:14px 0}

.field input,.query-row input{
  width:100%;
  height:48px;
  border-radius:12px;
  border:1px solid var(--border);
  background:rgba(2,6,23,.32);
  color:var(--text);
  padding:0 14px;
  outline:none;
  font-size:15px;
}

.field input:focus,.query-row input:focus{
  border-color:rgba(96,165,250,.46);
  box-shadow:0 0 0 3px rgba(96,165,250,.12);
}

.primary-btn,.ghost-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:100%;
  min-height:48px;
  border-radius:12px;
  border:1px solid transparent;
  cursor:pointer;
  font:inherit;
  font-weight:700;
  transition:transform .15s ease, box-shadow .15s ease, border-color .15s ease, background .15s ease;
}

.primary-btn{
  background:linear-gradient(135deg,#60a5fa,#2563eb 58%, #8b5cf6);
  color:#fff;
  box-shadow:0 10px 24px rgba(37,99,235,.22);
}

.primary-btn:hover,.ghost-btn:hover{transform:translateY(-1px)}
.primary-btn:disabled{opacity:.6;cursor:not-allowed;transform:none}
.primary-btn.sm{width:auto;min-width:104px;padding:0 18px}

.success-btn{
  background:linear-gradient(135deg,#22c55e,#16a34a);
  box-shadow:0 10px 24px rgba(22,163,74,.22);
  text-decoration:none;
}

.ghost-btn{
  margin-top:10px;
  background:transparent;
  color:var(--accent);
  border-color:rgba(96,165,250,.3);
}

.icon-btn{
  width:36px;
  height:36px;
  border-radius:10px;
  border:1px solid var(--border);
  background:rgba(148,163,184,.06);
  color:var(--text);
  cursor:pointer;
  font-size:22px;
  line-height:1;
}
.icon-btn:hover{border-color:var(--border-strong)}

.info-list{
  margin-top:10px;
  border-top:1px solid rgba(148,163,184,.08);
}

.info-row{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:12px;
  padding:11px 0;
  border-bottom:1px solid rgba(148,163,184,.08);
  font-size:14px;
}

.info-row .label{color:var(--text2)}
.info-row .val{word-break:break-all;text-align:right;font-weight:600}
.info-row .price{font-size:18px;color:#a5d8ff}
.info-row.accent .price{color:#7dd3fc}

.qr-box{
  margin-top:16px;
  text-align:center;
}

.qr-box img,.contact-item img{
  display:block;
  width:220px;
  height:220px;
  margin:0 auto;
  border-radius:14px;
  padding:8px;
  background:#fff;
  border:1px solid rgba(148,163,184,.18);
}

.qr-box .tip{
  margin-top:10px;
  color:var(--text2);
  font-size:12px;
  line-height:1.5;
}

.timer{
  margin-top:14px;
  padding:12px 14px;
  text-align:center;
  border-radius:12px;
  background:rgba(2,6,23,.32);
  color:var(--text2);
}
.timer b{color:#fb7185;font-size:18px}

.status-text{
  margin-top:10px;
  text-align:center;
  color:var(--text2);
  font-size:13px;
}

.success-panel{text-align:center}

.check-icon{
  width:58px;
  height:58px;
  margin:0 auto 12px;
  border-radius:50%;
  display:grid;
  place-items:center;
  color:#052e16;
  background:linear-gradient(135deg,#86efac,#22c55e);
  font-size:32px;
  font-weight:900;
}

.success-panel pre{
  margin:14px 0;
  padding:14px;
  text-align:left;
  border-radius:12px;
  background:rgba(2,6,23,.36);
  color:#86efac;
  border:1px solid rgba(34,197,94,.16);
  white-space:pre-wrap;
  word-break:break-all;
  min-height:86px;
}

.card-text{
  width:100%;
  min-height:120px;
  margin:14px 0 10px;
  padding:14px;
  border-radius:12px;
  border:1px solid rgba(34,197,94,.16);
  background:rgba(2,6,23,.36);
  color:#86efac;
  font:inherit;
  line-height:1.7;
  resize:none;
  outline:none;
  white-space:pre-wrap;
  word-break:break-all;
  cursor:text;
}

.card-text:focus{
  box-shadow:0 0 0 3px rgba(34,197,94,.12);
  border-color:rgba(34,197,94,.34);
}

.card-actions{
  display:grid;
  gap:10px;
}

.copy-tip{
  margin-top:8px;
  color:#86efac;
  font-size:13px;
}

.warn-text{color:#fb7185}

.query-panel{margin-top:16px}

.guide-list{
  margin-top:14px;
  padding-left:18px;
  color:var(--text2);
  line-height:1.85;
}

.guide-step + .guide-step{margin-top:10px}

.guide-note{
  margin-top:8px;
  color:var(--text2);
  font-size:13px;
  line-height:1.7;
}

.accordion{
  display:grid;
  gap:12px;
  margin-top:14px;
}

.accordion-item,
.mini-item{
  border:1px solid rgba(148,163,184,.12);
  border-radius:14px;
  background:rgba(2,6,23,.22);
  overflow:hidden;
}

.accordion-summary,
.mini-summary{
  list-style:none;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  cursor:pointer;
  padding:16px 16px;
  user-select:none;
}

.accordion-summary::-webkit-details-marker,
.mini-summary::-webkit-details-marker{display:none}

.accordion-title{
  font-size:16px;
  font-weight:700;
  color:var(--text);
}

.accordion-meta{
  flex:0 0 auto;
  font-size:12px;
  color:var(--accent);
  border:1px solid rgba(96,165,250,.2);
  background:rgba(96,165,250,.08);
  border-radius:999px;
  padding:5px 10px;
  white-space:nowrap;
}

.accordion-body{
  padding:0 16px 16px;
  border-top:1px solid rgba(148,163,184,.08);
}

.mini-item{
  margin-top:12px;
}

.mini-summary{
  padding:14px 14px;
  font-size:14px;
  font-weight:700;
  color:#d6e4ff;
}

.mini-body{
  padding:0 14px 14px;
  border-top:1px solid rgba(148,163,184,.08);
}

.accordion-item[open] .accordion-summary,
.mini-item[open] .mini-summary{
  background:rgba(96,165,250,.06);
}

.subpage .app-shell{padding-top:16px}

.query-row{
  display:flex;
  gap:10px;
  margin-top:14px;
}

.query-result{margin-top:14px}

.query-item{
  padding:14px;
  border-radius:14px;
  border:1px solid rgba(148,163,184,.12);
  background:rgba(2,6,23,.28);
  margin-top:10px;
}

.qi-head{
  color:var(--text2);
  font-size:12px;
  line-height:1.5;
  margin-bottom:10px;
}

.qi-card{
  white-space:pre-wrap;
  word-break:break-all;
  color:#86efac;
  font-size:14px;
  line-height:1.6;
}

.query-empty{
  padding:14px 0;
  color:var(--text2);
  font-size:13px;
}

.download-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(280px,1fr));
  gap:14px;
  margin-top:14px;
}

.download-card{
  padding:18px;
  border-radius:14px;
  border:1px solid rgba(148,163,184,.12);
  background:rgba(2,6,23,.28);
}

.download-head{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:12px;
}

.download-eyebrow{
  color:var(--accent);
  text-transform:uppercase;
  letter-spacing:.14em;
  font-size:12px;
}

.download-card h3{
  margin-top:4px;
  font-size:18px;
  line-height:1.3;
}

.download-tag{
  padding:6px 10px;
  border-radius:999px;
  border:1px solid rgba(96,165,250,.22);
  color:var(--accent);
  font-size:12px;
  white-space:nowrap;
}

.download-desc{
  margin-top:12px;
  color:var(--text2);
  line-height:1.7;
  font-size:13px;
}

.download-foot{
  margin-top:16px;
}

.download-foot .primary-btn{
  width:100%;
  text-decoration:none;
}

.contact-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:14px;
  margin-top:14px;
}

.contact-item{
  text-align:center;
  padding:10px;
  border-radius:14px;
  background:rgba(2,6,23,.2);
  border:1px solid rgba(148,163,184,.12);
}

.contact-item p{
  color:var(--text2);
  margin-bottom:10px;
  font-size:13px;
}

.footer{
  text-align:center;
  padding:24px 0 6px;
  color:rgba(148,163,184,.75);
  font-size:12px;
}

.wechat-gate{
  position:fixed;
  inset:0;
  z-index:50;
  display:grid;
  place-items:center;
  padding:20px;
  background:rgba(2,6,23,.78);
  backdrop-filter:blur(16px);
}

.wechat-card{
  width:min(100%,420px);
  padding:22px;
  border-radius:18px;
  background:linear-gradient(180deg, rgba(15,23,42,.96), rgba(8,15,28,.98));
  border:1px solid rgba(96,165,250,.22);
  box-shadow:0 24px 60px rgba(2,6,23,.45);
}

.wechat-card h2{
  margin-top:8px;
  font-size:24px;
}

.wechat-text{
  margin-top:10px;
  color:var(--text2);
  line-height:1.7;
  font-size:14px;
}

.wechat-actions{
  display:grid;
  gap:10px;
  margin-top:18px;
}

[hidden]{display:none !important}

@media (max-width: 980px){
  .layout{display:block}
}

@media (max-width: 720px){
  .app-shell{width:min(100% - 20px, 1180px);padding-top:18px}
  .hero{padding-top:10px}
  .hero h1{font-size:30px}
  .sub{font-size:14px}
  .product-grid{grid-template-columns:1fr}
  .query-row{flex-direction:column}
  .primary-btn.sm{width:100%}
  .contact-grid{grid-template-columns:1fr}
  .qr-box img,.contact-item img{width:180px;height:180px}
}