/* ============================================================
   数炼智擎 · slzq.com — shared design system
   Aurora theme. Flowing data-stream particle field + glassmorphism.
   ============================================================ */

:root{
  /* surface */
  --bg:        #05070E;
  --ink:       #EAF1FF;
  --muted:     #94A2BD;
  --faint:     #8A99B8;
  --line:      rgba(255,255,255,0.09);
  --glass:     rgba(16,22,38,0.42);
  --glass-2:   rgba(20,28,48,0.62);
  --glass-line:rgba(255,255,255,0.10);

  /* aurora gradient (indigo -> cyan -> aqua) */
  --c1: #5B6CFF;
  --c2: #22D3EE;
  --c3: #34E0C4;
  --grad: linear-gradient(100deg, var(--c1) 4%, var(--c2) 50%, var(--c3) 96%);

  /* display stack: Sora for latin, proper CJK fallback for 中文标题 */
  --display: "Sora","PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  --radius: 16px;
  --ease: cubic-bezier(.16,1,.3,1);
}

*{ box-sizing:border-box; margin:0; padding:0; }
html,body{ height:100%; }

body{
  font-family:"Inter", system-ui, -apple-system, "PingFang SC",
              "Microsoft YaHei", sans-serif;
  color:var(--ink);
  background:var(--bg);
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  min-height:100vh;
  display:flex;
  flex-direction:column;
}

/* ---------- ambient washes behind particles ---------- */
.atmosphere{
  position:fixed; inset:0; z-index:0; pointer-events:none;
  background:
    radial-gradient(58% 48% at 50% 38%, rgba(91,108,255,0.20), transparent 70%),
    radial-gradient(48% 42% at 66% 60%, rgba(52,224,196,0.14), transparent 72%),
    radial-gradient(52% 48% at 32% 56%, rgba(34,211,238,0.16), transparent 72%);
}

/* particle canvas */
#bg{
  position:fixed; inset:0; z-index:1;
  width:100%; height:100%; display:block;
}

/* inner pages: a radial scrim keeps the field alive at the edges
   while protecting text contrast at the center (field is dimmed once,
   via the canvas data-intensity -> shader uOpacity). */
body.inner .scrim{
  position:fixed; inset:0; z-index:1; pointer-events:none;
  background:radial-gradient(80% 70% at 50% 30%, transparent 30%, rgba(5,7,14,0.55) 100%);
}

.stage{ position:relative; z-index:2; flex:1 0 auto; display:flex; flex-direction:column; }

/* ---------- nav ---------- */
.nav{
  position:fixed; top:0; left:0; right:0; z-index:20;
  display:flex; align-items:center; justify-content:space-between; gap:24px;
  padding:13px 22px; margin:14px;
  border-radius:var(--radius);
  background:var(--glass);
  border:1px solid var(--glass-line);
  box-shadow:0 1px 0 rgba(255,255,255,0.05) inset, 0 12px 40px rgba(0,0,0,0.35);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
}
.brand{
  display:flex; align-items:center; gap:11px;
  font-family:var(--display); font-weight:600; font-size:18px;
  letter-spacing:-0.01em; color:var(--ink); text-decoration:none;
}
.brand .mark{
  width:24px; height:24px; border-radius:8px;
  background:conic-gradient(from 200deg, var(--c1), var(--c2), var(--c3), var(--c1));
  box-shadow:0 2px 12px rgba(34,211,238,0.45);
  flex:none;
}
.brand .en{ color:var(--faint); font-weight:500; font-size:13px; letter-spacing:0.18em; }
.links{ display:flex; gap:4px; }
.links a{
  font-size:14px; color:var(--muted); text-decoration:none;
  padding:8px 13px; border-radius:9px;
  transition:color .18s var(--ease), background .18s var(--ease);
}
.links a:hover{ color:var(--ink); background:rgba(255,255,255,0.06); }
.links a.active{ color:var(--ink); background:rgba(255,255,255,0.07); }

/* ---------- buttons ---------- */
.btn{
  font-family:"Inter", sans-serif; font-size:15px; font-weight:500;
  border:none; cursor:pointer; text-decoration:none;
  padding:12px 22px; border-radius:12px;
  display:inline-flex; align-items:center; gap:9px;
  transition:transform .15s var(--ease), box-shadow .2s var(--ease), background .2s var(--ease);
}
.btn-solid{
  color:#04121A; font-weight:600;
  background:var(--grad);
  box-shadow:0 8px 24px rgba(34,211,238,0.28);
}
.btn-solid:hover{ transform:translateY(-1px); box-shadow:0 12px 30px rgba(34,211,238,0.4); }
.btn-line{
  color:var(--ink);
  background:var(--glass-2);
  border:1px solid var(--glass-line);
  backdrop-filter:blur(12px); -webkit-backdrop-filter:blur(12px);
}
.btn-line:hover{ transform:translateY(-1px); border-color:rgba(255,255,255,0.2); }

/* ---------- home hero ---------- */
.hero{
  flex:1 0 auto;
  min-height:100vh;
  display:flex; flex-direction:column; align-items:center; justify-content:center;
  text-align:center; padding:140px 24px 90px;
  /* gentle center vignette so the headline always wins over the bright core */
  background:radial-gradient(58% 50% at 50% 46%, rgba(5,7,14,0.45), transparent 72%);
}
.tag{
  display:inline-flex; align-items:center; gap:9px;
  font-size:13px; font-weight:500; color:var(--ink);
  padding:6px 14px 6px 8px; border-radius:999px;
  background:var(--glass-2);
  border:1px solid var(--glass-line);
  backdrop-filter:blur(12px); -webkit-backdrop-filter:blur(12px);
  margin-bottom:34px;
  opacity:0; transform:translateY(10px);
  animation:rise .8s .15s var(--ease) forwards;
}
.tag .dot{
  width:7px; height:7px; border-radius:50%;
  background:var(--grad); box-shadow:0 0 10px var(--c2);
}
.tag .en{ color:var(--faint); letter-spacing:0.16em; font-size:12px; }

h1.title{
  font-family:var(--display); font-weight:600;
  font-size:clamp(48px, 11vw, 116px);
  line-height:1.05; letter-spacing:0.015em;
  margin-bottom:26px;
}
h1.title .ln{ display:block; opacity:0; transform:translateY(20px); }
h1.title .ln:nth-child(1){ animation:rise .95s .25s var(--ease) forwards; }
h1.title .ln:nth-child(2){ animation:rise .95s .38s var(--ease) forwards; }
.flow{
  background:var(--grad);
  -webkit-background-clip:text; background-clip:text; color:transparent;
}

.sub{
  font-size:clamp(16px, 2.1vw, 19px);
  line-height:1.6; color:var(--muted);
  max-width:30ch; margin-bottom:38px;
  opacity:0; transform:translateY(14px);
  animation:rise .9s .55s var(--ease) forwards;
}
.hero .actions{
  display:flex; gap:12px; flex-wrap:wrap; justify-content:center;
  opacity:0; transform:translateY(14px);
  animation:rise .9s .68s var(--ease) forwards;
}
.scroll-hint{
  margin-top:64px; font-size:12px; letter-spacing:0.2em; color:var(--faint);
  opacity:0; animation:fade 1.4s 1.1s ease forwards;
}

/* ---------- inner page shell ---------- */
.page{
  flex:1 0 auto; width:100%;
  max-width:980px; margin:0 auto;
  padding:160px 24px 80px;
}
.eyebrow{
  font-size:12px; font-weight:600; letter-spacing:0.22em; text-transform:uppercase;
  color:var(--c2); /* fallback for clip-text */
  background:var(--grad); -webkit-background-clip:text; background-clip:text;
  -webkit-text-fill-color:transparent;
  width:max-content; margin-bottom:16px;
  opacity:0; transform:translateY(10px); animation:rise .8s .1s var(--ease) forwards;
}
.page h1{
  font-family:var(--display); font-weight:600;
  font-size:clamp(36px, 6vw, 60px); line-height:1.1; letter-spacing:0.015em;
  margin-bottom:18px;
  opacity:0; transform:translateY(16px); animation:rise .9s .2s var(--ease) forwards;
}
.page .lede{
  font-size:clamp(15px, 2vw, 18px); line-height:1.6; color:var(--muted);
  max-width:54ch; margin-bottom:48px;
  opacity:0; transform:translateY(14px); animation:rise .9s .32s var(--ease) forwards;
}

/* ---------- product card ---------- */
.product{
  display:block; text-decoration:none; color:inherit;
  border-radius:20px;
  background:var(--glass);
  border:1px solid var(--glass-line);
  box-shadow:0 1px 0 rgba(255,255,255,0.04) inset, 0 18px 50px rgba(0,0,0,0.35);
  backdrop-filter:blur(16px) saturate(130%);
  -webkit-backdrop-filter:blur(16px) saturate(130%);
  padding:34px 34px 30px;
  /* 入场动画用 from+backwards（基态=最终态）：forwards 填充会在 Chrome 里永久压住 hover 的 transform */
  animation:rise-in .95s .42s var(--ease) backwards;
  transition:transform .2s var(--ease), border-color .2s var(--ease), box-shadow .2s var(--ease), background .2s var(--ease);
}
@keyframes rise-in{ from{ opacity:0; transform:translateY(18px); } }
a.product:hover{ transform:translateY(-3px); border-color:rgba(255,255,255,0.2);
  box-shadow:0 24px 60px rgba(0,0,0,0.45), 0 0 0 1px rgba(34,211,238,0.18); }
.product-top{ display:flex; align-items:center; gap:16px; margin-bottom:18px; }
.product .badge{
  font-family:var(--display); font-size:13px; font-weight:600; color:#04121A;
  width:36px; height:36px; border-radius:11px; flex:none;
  display:flex; align-items:center; justify-content:center;
  background:var(--grad); box-shadow:0 4px 16px rgba(34,211,238,0.3);
}
.product h2{
  font-family:var(--display); font-size:24px; font-weight:600; letter-spacing:0.01em;
}
.product h2 .en{ color:var(--faint); font-weight:500; font-size:14px; letter-spacing:0.08em; margin-left:10px; }
.product .status{
  margin-left:auto; font-size:12px; color:var(--c3);
  padding:5px 11px; border-radius:999px;
  background:rgba(52,224,196,0.10); border:1px solid rgba(52,224,196,0.25);
}
.product p{ color:var(--muted); line-height:1.65; font-size:15px; max-width:62ch; }
.chips{ display:flex; flex-wrap:wrap; gap:8px; margin-top:22px; }
.chip{
  font-size:12.5px; color:var(--muted);
  padding:6px 12px; border-radius:999px;
  background:rgba(255,255,255,0.04); border:1px solid var(--glass-line);
}
.more-note{
  margin-top:26px; font-size:13.5px; color:var(--faint);
  opacity:0; animation:fade 1.2s .8s ease forwards;
}

/* ---------- contact ---------- */
.contact-grid{
  display:grid; grid-template-columns:1fr 1fr; gap:16px; max-width:680px;
  opacity:0; transform:translateY(18px); animation:rise .95s .42s var(--ease) forwards;
}
.contact-card{
  border-radius:18px;
  background:var(--glass);
  border:1px solid var(--glass-line);
  box-shadow:0 1px 0 rgba(255,255,255,0.04) inset, 0 18px 50px rgba(0,0,0,0.3);
  backdrop-filter:blur(16px) saturate(130%);
  -webkit-backdrop-filter:blur(16px) saturate(130%);
  padding:28px;
  display:flex; flex-direction:column; gap:6px;
}
.contact-card .ic{
  width:42px; height:42px; border-radius:12px; margin-bottom:14px;
  display:flex; align-items:center; justify-content:center;
  background:rgba(255,255,255,0.05); border:1px solid var(--glass-line);
}
.contact-card .ic svg{ width:22px; height:22px; }
.contact-card .label{
  font-size:12px; letter-spacing:0.16em; text-transform:uppercase; color:var(--faint);
}
.contact-card .value{
  font-family:var(--display); font-size:20px; font-weight:600; color:var(--ink);
  overflow-wrap:anywhere;
}
.contact-card .row{ display:flex; align-items:center; gap:10px; margin-top:12px; flex-wrap:wrap; }
.copy-btn{
  font-size:12.5px; color:var(--muted); cursor:pointer;
  padding:6px 12px; border-radius:9px;
  background:rgba(255,255,255,0.04); border:1px solid var(--glass-line);
  transition:color .18s var(--ease), border-color .18s var(--ease), background .18s var(--ease);
}
.copy-btn:hover{ color:var(--ink); border-color:rgba(255,255,255,0.22); }
.copy-btn.copied{ color:var(--c3); border-color:rgba(52,224,196,0.4); }
.contact-card a.value{ text-decoration:none; }
.contact-card a.value:hover{ background:var(--grad); -webkit-background-clip:text; background-clip:text; color:transparent; }

/* ---------- download button (product) ---------- */
.product-actions{ display:flex; align-items:center; gap:16px; flex-wrap:wrap; margin-top:26px; }
.dl-note{ font-size:13px; color:var(--faint); }

/* ---------- 微信客服卡片 ---------- */
.kf-card{
  grid-column:1 / -1;
  flex-direction:row; align-items:center; justify-content:space-between;
  gap:24px; flex-wrap:wrap;
}
.kf-info{ display:flex; flex-direction:column; gap:6px; min-width:220px; flex:1; }
.kf-info .ic{ margin-bottom:12px; }
.kf-sub{ color:var(--muted); font-size:13.5px; line-height:1.55; margin-top:4px; max-width:44ch; }
.kf-link{ color:var(--ink); }
.qr{
  position:relative; flex:none;
  width:128px; height:128px; border-radius:14px;
  display:flex; align-items:center; justify-content:center; text-align:center;
  background:rgba(255,255,255,0.05); border:1px solid var(--glass-line);
  overflow:hidden;
}
.qr img{
  position:absolute; inset:8px; width:calc(100% - 16px); height:calc(100% - 16px);
  object-fit:contain; border-radius:8px; background:#fff;
}
.qr-ph{ font-size:12px; color:var(--faint); line-height:1.5; padding:10px; }
.qr-ph em{ color:var(--muted); font-style:normal; font-size:11px; }

/* ---------- clickable product card ---------- */
.product[data-href]{ cursor:pointer; }
.product[data-href]:hover{
  transform:translateY(-4px) scale(1.006);
  border-color:rgba(34,211,238,0.35);
  box-shadow:0 26px 64px rgba(0,0,0,0.5),
             0 0 0 1px rgba(34,211,238,0.22),
             0 0 44px rgba(34,211,238,0.10);
  background:rgba(255,255,255,0.055);
}
.product[data-href]:hover .badge{
  box-shadow:0 4px 22px rgba(34,211,238,0.55);
}
.product[data-href]:hover h2{
  background:var(--grad); -webkit-background-clip:text; background-clip:text; color:transparent;
}
.product[data-href]:hover h2 .en{ -webkit-text-fill-color:var(--faint); color:var(--faint); }
.product[data-href]:focus-visible{
  outline:2px solid var(--c2); outline-offset:3px;
}

/* ---------- product detail page ---------- */
.crumb{ font-size:13px; color:var(--faint); margin-bottom:22px; opacity:0; animation:fade 1s .1s ease forwards; }
.crumb a{ color:var(--muted); text-decoration:none; }
.crumb a:hover{ color:var(--ink); }
.crumb .dot-sep{ margin:0 8px; opacity:.5; }

.detail-hero{ margin-bottom:44px; }
.detail-hero .product-actions{ margin-top:28px; }

.shot{
  position:relative; width:100%; min-height:200px; border-radius:18px;
  display:flex; align-items:center; justify-content:center; text-align:center;
  background:var(--glass); border:1px solid var(--glass-line);
  box-shadow:0 18px 50px rgba(0,0,0,0.35);
  overflow:hidden; margin-bottom:56px;
  animation:rise-in .95s .3s var(--ease) backwards;
}
.shot img{ display:block; width:100%; height:auto; }
.shot-ph{ font-size:13px; color:var(--faint); line-height:1.6; padding:70px 20px; }
.shot-ph em{ color:var(--muted); font-style:normal; font-size:12px; }

.detail-block{ margin-bottom:52px; }
.sec-title{
  font-family:var(--display); font-size:22px; font-weight:600; letter-spacing:0.01em;
  color:var(--ink); margin:0 0 20px;
}

.features{ display:grid; grid-template-columns:repeat(auto-fit, minmax(238px, 1fr)); gap:16px; }
.feature{
  border-radius:16px; padding:24px 24px 22px;
  background:var(--glass); border:1px solid var(--glass-line);
  backdrop-filter:blur(14px) saturate(130%); -webkit-backdrop-filter:blur(14px) saturate(130%);
  transition:transform .2s var(--ease), border-color .2s var(--ease);
}
.feature:hover{ transform:translateY(-2px); border-color:rgba(255,255,255,0.16); }
.feature .f-ic{
  width:40px; height:40px; border-radius:11px; margin-bottom:14px;
  display:flex; align-items:center; justify-content:center;
  background:rgba(255,255,255,0.05); border:1px solid var(--glass-line);
}
.feature .f-ic svg{ width:20px; height:20px; }
.feature h3{ font-size:16px; font-weight:600; color:var(--ink); margin-bottom:8px; }
.feature p{ font-size:13.5px; line-height:1.62; color:var(--muted); }

.spec{
  border-radius:16px; overflow:hidden;
  background:var(--glass); border:1px solid var(--glass-line);
}
.spec-row{
  display:flex; justify-content:space-between; gap:20px;
  padding:15px 22px; border-bottom:1px solid var(--glass-line); font-size:14.5px;
}
.spec-row:last-child{ border-bottom:none; }
.spec-row span:first-child{ color:var(--faint); }
.spec-row span:last-child{ color:var(--ink); text-align:right; }

.detail-cta{
  display:flex; align-items:center; gap:18px; flex-wrap:wrap;
  padding:24px 28px; border-radius:16px;
  background:var(--glass); border:1px solid var(--glass-line);
}
.detail-cta p{ color:var(--muted); font-size:15px; margin:0; }
.detail-cta .btn{ margin-left:auto; }

/* ---------- footer ---------- */
.foot{
  flex:none; position:relative; z-index:2;
  display:flex; align-items:center; justify-content:space-between; gap:16px; flex-wrap:wrap;
  padding:22px 32px; margin:14px;
  font-size:12.5px; color:var(--faint);
  border-top:1px solid var(--line);
}
.foot .dot-sep{ opacity:.5; margin:0 4px; }
.foot a{ color:var(--faint); text-decoration:none; transition:color .18s var(--ease); }
.foot a:hover{ color:var(--muted); }

/* ---------- motion ---------- */
@keyframes rise{ to{ opacity:1; transform:translateY(0); } }
@keyframes fade{ to{ opacity:1; } }

.btn:focus-visible, a:focus-visible, .copy-btn:focus-visible{
  outline:2px solid var(--c2); outline-offset:3px;
}

/* ---------- responsive ---------- */
@media (max-width:760px){
  .nav{ padding:11px 14px; margin:10px; gap:12px; }
  .brand .en{ display:none; }
  .links a{ padding:8px 10px; font-size:13.5px; }
  .hero{ padding:130px 20px 70px; }
  h1.title{ font-size:clamp(40px, 12.5vw, 76px); }
  .sub{ max-width:34ch; }
  .page{ padding:130px 20px 60px; }
  .contact-grid{ grid-template-columns:1fr; }
  .product h2 .en{ display:block; margin-left:0; margin-top:4px; }
  .foot{ padding:18px; margin:10px; justify-content:center; text-align:center; }
}

@media (prefers-reduced-motion: reduce){
  *{ animation-duration:.01ms !important; animation-iteration-count:1 !important; transition:none !important; }
  .tag,.sub,.scroll-hint,.eyebrow,.page h1,.page .lede,.product,.contact-grid,.more-note,
  h1.title .ln,.hero .actions{ opacity:1 !important; transform:none !important; }
}