* { margin:0; box-sizing:border-box; }
html { overflow-anchor:none; }
:root {
  --bg:#08090d; --panel:#0e1016; --line:#1d212b;
  --ink:#e8e6e1; --dim:#9b978f; --faint:#55534e;
  --warm1:#ffd9a0; --warm2:#ff9e5e;
  --blue:#7ea2ff; --gold:#ffc47e; --rose:#ff6b9d;
}
body {
  background:#07080c;
  color:var(--ink);
  font-family:-apple-system,"PingFang SC","Segoe UI",system-ui,sans-serif;
  -webkit-font-smoothing:antialiased; overflow-x:hidden;
}
/* 视口固定的环境渐变:放在合成层里,滚动不触发重绘(移动端不卡的关键) */
body::before { content:""; position:fixed; inset:0; z-index:-2; pointer-events:none;
  background:radial-gradient(ellipse 130% 90% at 50% -10%, #12151f 0%, #0a0c12 48%, #07080c 100%); }
.wrap { max-width:1060px; margin:0 auto; padding:0 32px; }

/* ── 环境光层:颜色随场景滚动渐变(JS 写入 --amb1/2/3) ── */
#ambient { position:fixed; inset:0; z-index:-1; pointer-events:none; }
#ambient .a { position:absolute; border-radius:50%; filter:blur(90px); }
#a1 { width:74vw; height:74vh; top:-26vh; right:-20vw;
  background:radial-gradient(circle, var(--amb1, rgba(255,180,110,.15)), transparent 70%); }
#a2 { width:64vw; height:64vh; bottom:-28vh; left:-20vw;
  background:radial-gradient(circle, var(--amb2, rgba(90,140,255,.11)), transparent 70%); }
#a3 { width:44vw; height:38vh; top:32vh; left:30vw; opacity:.5;
  background:radial-gradient(circle, var(--amb3, rgba(255,217,160,.05)), transparent 70%); }

/* ── 全页星点层(微视差) ── */
#stars { position:fixed; inset:0; z-index:-1; pointer-events:none; }
.gstar { position:absolute; border-radius:50%; background:#fff;
  animation:twinkle 3.6s ease-in-out infinite; }
.gstar.w { background:var(--warm1); }

/* ── 噪点层:胶片质感 ── */
#grain { position:fixed; inset:0; z-index:97; pointer-events:none; opacity:.045;
  background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='0.6'/%3E%3C/svg%3E"); }

/* 滚动进度条 */
#progress { position:fixed; top:0; left:0; height:2px; width:0;
  background:linear-gradient(90deg,var(--warm1),var(--warm2)); z-index:99; }

/* 导航 */
nav { position:fixed; top:0; left:0; right:0; z-index:50; transition:background .4s,border .4s;
  background:transparent; border-bottom:1px solid transparent; }
nav.solid { -webkit-backdrop-filter:blur(14px); backdrop-filter:blur(14px);
  background:rgba(8,9,13,.72); border-bottom:1px solid rgba(255,255,255,.06); }
.navIn { display:flex; justify-content:space-between; align-items:center; height:64px; }
.brand { display:flex; align-items:center; gap:10px; font-weight:800; letter-spacing:.5px; font-size:16px; }
.navlinks { display:flex; gap:28px; font-size:14px; }
.navlinks a { color:var(--dim); text-decoration:none; transition:color .2s; }
.navlinks a:hover { color:var(--ink); }

/* ═══ 场景 1:Hero(钉住 + 随滚动缩小淡出) ═══ */
.heroScene { height:220vh; position:relative; }
.heroPin { position:sticky; top:0; height:100vh; display:grid; place-items:center;
  overflow:hidden; text-align:center; }
.orb { position:absolute; border-radius:50%; filter:blur(70px); pointer-events:none; }
.orb.warm { width:640px; height:480px; top:-160px; right:-120px;
  background:radial-gradient(circle,rgba(255,180,110,.16),transparent 70%); }
.orb.blue { width:520px; height:420px; bottom:-140px; left:-140px;
  background:radial-gradient(circle,rgba(90,140,255,.12),transparent 70%); }
.star { position:absolute; border-radius:50%; background:var(--warm1);
  animation:twinkle 3.2s ease-in-out infinite; }
@keyframes twinkle { 0%,100%{opacity:.25} 50%{opacity:1} }
.heroIn { position:relative; padding:0 24px;
  transform:scale(calc(1 - var(--p,0)*.18)) translateY(calc(var(--p,0)*-60px));
  opacity:calc(1 - var(--p,0)*1.4);
  will-change:transform, opacity; backface-visibility:hidden; }
.kicker { font-size:14px; letter-spacing:6px; color:var(--dim); }
.h1 { margin-top:22px; font-size:clamp(44px,7.5vw,84px); font-weight:800;
  letter-spacing:3px; line-height:1.25; }
.h1 .glow { background:linear-gradient(92deg,var(--warm1) 20%,var(--warm2) 50%,var(--warm1) 80%);
  background-size:200% 100%; -webkit-background-clip:text; background-clip:text;
  color:transparent; animation:shimmer 5s linear infinite; }
@keyframes shimmer { to { background-position:200% 0; } }
.lead { margin:26px auto 0; font-size:clamp(15px,1.8vw,18px); color:var(--dim);
  line-height:2; max-width:620px; }
.scrollCue { position:absolute; bottom:36px; left:50%; transform:translateX(-50%);
  color:var(--faint); font-size:12px; letter-spacing:3px; text-decoration:none;
  opacity:calc(1 - var(--p,0)*3); }
.scrollCue .chev { display:block; margin:10px auto 0; width:18px; height:18px;
  border-right:2px solid var(--faint); border-bottom:2px solid var(--faint);
  transform:rotate(45deg); animation:bob 1.8s ease-in-out infinite; }
@keyframes bob { 0%,100%{transform:rotate(45deg) translate(0,0)} 50%{transform:rotate(45deg) translate(5px,5px)} }

/* ═══ 场景 2/3:产品展示(静态区块) ═══ */
.prodScene { position:relative; }
.prodPin { min-height:100vh; display:grid; align-items:center; padding:10vh 0; }
.prodGrid { display:grid; grid-template-columns:1.05fr .95fr; gap:56px; align-items:center; }
.scene-gold .prodGrid .txt { order:2; } .scene-gold .prodGrid .stage { order:1; }

.pKick { font-size:13px; font-weight:700; letter-spacing:2px; }
.scene-blue .pKick { color:var(--blue); } .scene-gold .pKick { color:var(--gold); }
.pName { margin-top:14px; font-size:clamp(26px,3.4vw,36px); font-weight:800; }
.pTag { font-size:12px; margin-left:12px; padding:4px 12px; border-radius:99px; vertical-align:6px; }
.scene-blue .pTag { color:var(--blue); background:rgba(126,162,255,.1); }
.scene-gold .pTag { color:var(--gold); background:rgba(255,196,126,.1); }

/* 功能要点(全部常亮) */
.featList { margin-top:30px; display:grid; gap:8px; }
.feat { padding:14px 18px; border-radius:14px;
  background:var(--panel); border:1px solid var(--line); }
.feat h4 { font-size:16px; font-weight:800; }
.scene-blue .feat h4 { color:var(--blue); } .scene-gold .feat h4 { color:var(--gold); } .scene-rose .feat h4 { color:var(--rose); }
.scene-rose .pKick { color:var(--rose); }
.scene-rose .pTag { color:var(--rose); background:rgba(255,107,157,.1); }
.scene-rose .pLink { color:var(--rose); }
.scene-rose .stageGlow { background:rgba(255,107,157,.14); }
/* 桌面窗口 mockup(artio,替代手机) */
.win { position:relative; width:min(460px,100%); border-radius:12px; overflow:hidden;
  border:1px solid #262b36; background:#0d1018; box-shadow:0 40px 90px -30px rgba(0,0,0,.85); transition:transform .5s; }
.win:hover { transform:translateY(-6px); }
.win .bar { height:30px; display:flex; align-items:center; gap:7px; padding:0 13px; background:#151922; border-bottom:1px solid #232830; }
.win .bar i { width:10px; height:10px; border-radius:50%; background:#333947; display:block; }
.win img { width:100%; display:block; }
.feat p { margin-top:4px; font-size:13.5px; color:var(--dim); line-height:1.8; }
.pLinkRow { margin-top:26px; display:flex; gap:22px; align-items:center; flex-wrap:wrap; }
.pLink { text-decoration:none; font-size:15px; font-weight:700; }
.scene-blue .pLink { color:var(--blue); } .scene-gold .pLink { color:var(--gold); }
.pBtn { display:inline-flex; align-items:center; gap:8px; padding:11px 22px; border-radius:99px;
  font-size:14px; font-weight:700; text-decoration:none; color:var(--gold);
  background:rgba(255,196,126,.1); border:1px solid rgba(255,196,126,.35); transition:background .2s; }
.pBtn:hover { background:rgba(255,196,126,.18); }
.pBtn svg { width:16px; height:16px; fill:currentColor; }

/* 悬停下载按钮 → 浮出二维码气泡 */
.dlWrap { position:relative; display:inline-flex; }
.qrPop { position:absolute; bottom:calc(100% + 14px); left:50%; z-index:5;
  transform:translateX(-50%) translateY(8px) scale(.95); opacity:0; pointer-events:none;
  transition:opacity .25s, transform .25s;
  background:#fff; border-radius:14px; padding:10px 10px 4px; text-align:center;
  box-shadow:0 18px 50px rgba(0,0,0,.55); }
.qrPop::after { content:""; position:absolute; top:100%; left:50%; transform:translateX(-50%);
  border:7px solid transparent; border-top-color:#fff; }
.qrPop img { width:120px; height:120px; display:block; }
.qrTip { display:block; font-size:11px; color:#5b6472; padding:4px 0 4px; white-space:nowrap; }
.dlWrap:hover .qrPop { opacity:1; transform:translateX(-50%) translateY(0) scale(1); }
@media (max-width:760px) { .qrPop { display:none; } }

/* 手机:入场 scrub + 屏幕随进度换截图 */
.stage { position:relative; display:grid; place-items:center; }
.stageGlow { position:absolute; width:80%; height:80%; border-radius:50%; filter:blur(60px);
  opacity:.8; }
.scene-blue .stageGlow { background:rgba(90,140,255,.16); }
.scene-gold .stageGlow { background:rgba(255,180,90,.14); }
.phone { position:relative; width:min(260px,64%); aspect-ratio:9/19.2; border-radius:36px;
  border:3px solid #262b36; background:#0d1018; padding:10px;
  box-shadow:0 40px 90px -30px rgba(0,0,0,.85); transition:transform .5s; }
.phone:hover { transform:translateY(-8px) rotate(-1.2deg); }
.screenBox { position:relative; width:100%; height:100%; border-radius:26px; overflow:hidden;
  background:#0d1018; }
.frame { position:absolute; inset:0;
  opacity:0; transform:scale(1.06); transition:opacity .4s, transform .4s; }
.frame.on { opacity:1; transform:scale(1); }
.frame img { width:100%; height:100%; object-fit:cover; display:block; }

/* ═══ 场景 4:关于(静态) ═══ */
.aboutScene { position:relative; }
.aboutPin { min-height:70vh; display:grid; place-items:center; text-align:center;
  padding:12vh 0 10vh; }
.aboutVerse { font-size:clamp(22px,3.2vw,34px); font-weight:700; line-height:2.1; letter-spacing:1px; }
.aboutVerse .em { background:linear-gradient(92deg,var(--warm1),var(--warm2));
  -webkit-background-clip:text; background-clip:text; color:transparent; }
.aboutMeta { margin:34px auto 0; color:var(--dim); font-size:15px; line-height:2.2; max-width:620px; }
.aboutMeta a { color:var(--warm1); }

/* 页脚 */
footer { border-top:1px solid rgba(255,255,255,.05); padding:38px 0 46px;
  text-align:center; color:var(--faint); font-size:12.5px; line-height:2.2; }
footer a { color:var(--faint); }

@media (max-width:760px) {
  .prodGrid { grid-template-columns:1fr; gap:20px; }
  .scene-gold .prodGrid .txt { order:1; } .scene-gold .prodGrid .stage { order:2; }
  .phone { width:min(180px,52%); }
  .featList { gap:4px; } .feat { padding:10px 14px; }
}

@media (prefers-reduced-motion: reduce) {
  .heroScene { height:auto; }
  .heroPin { position:static; height:auto; padding:12vh 0; }
  .heroIn,.phone,.scrollCue { transform:none; opacity:1; }
  .star,.gstar { animation:none; }
}