/* 11/06 一批「照参考做」的 3D 概念网站共用样式。每个网站只在自己的 index.html 改 :root 颜色、字体和内容 */
:root{
  --bg:#F2EDE3; --ink:#1B1A17; --ink2:#5d574d; --accent:#1B1A17; --accent-ink:#fff;
  --line:rgba(0,0,0,.12); --nav-bg:transparent;
  --serif:'Playfair Display',Georgia,serif; --sans:'Inter',system-ui,-apple-system,'Segoe UI',sans-serif;
  --display:var(--serif); --h-size:clamp(2.6rem,5.6vw,5.4rem); --h-weight:500; --h-case:uppercase; --h-track:-.01em; --h-line:.98;
  --radius-btn:99px; --pad:clamp(1.1rem,4vw,4.2rem);
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
html.lenis,html.lenis body{height:auto}
.lenis.lenis-smooth{scroll-behavior:auto!important}
body{background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:15px;line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;cursor:pointer;border:0;background:none}

/* 噪点 */
body:after{content:"";position:fixed;inset:0;pointer-events:none;z-index:90;opacity:.05;mix-blend-mode:overlay;
  background-image: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='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")}

/* 顶部 */
.topbar{position:fixed;top:0;left:0;right:0;z-index:50;display:flex;justify-content:flex-end;gap:1.4rem;padding:.35rem var(--pad);font-size:.68rem;letter-spacing:.04em;color:var(--ink2);background:var(--bg)}
.topbar span{display:flex;align-items:center;gap:.35rem}
.nav{position:fixed;left:0;right:0;top:0;z-index:49;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;padding:1.1rem var(--pad);background:var(--nav-bg);transition:background .4s,box-shadow .4s}
.has-topbar .nav{top:1.55rem}
.nav.solid{background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);box-shadow:0 1px 0 var(--line)}

.logo{font-family:var(--logo-font,var(--sans));font-weight:700;letter-spacing:.04em;line-height:1;font-size:1.05rem;text-transform:uppercase;justify-self:start}
.logo small{display:block;font-size:.55rem;letter-spacing:.32em;font-weight:500;margin-top:.15rem}
.links{display:flex;gap:clamp(1rem,2.4vw,2.2rem);font-size:.78rem;font-weight:500}
.links a{position:relative;padding:.25rem 0;opacity:.82;transition:opacity .3s}
.links a:hover,.links a.on{opacity:1}
.links a.on:after,.links a:after{content:"";position:absolute;left:0;right:0;bottom:-.2rem;height:1.5px;background:currentColor;transform:scaleX(0);transform-origin:left;transition:transform .4s}
.links a.on:after,.links a:hover:after{transform:scaleX(1)}
.tools{justify-self:end;display:flex;align-items:center;gap:1rem;font-size:.78rem}
.ico{width:18px;height:18px;display:inline-block}
.cart{position:relative}
.cart b{position:absolute;top:-6px;right:-8px;min-width:15px;height:15px;border-radius:99px;background:var(--accent);color:var(--accent-ink);font-size:.58rem;display:grid;place-items:center;font-weight:700;transition:transform .3s}
.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.72rem 1.35rem;border-radius:var(--radius-btn);background:var(--accent);color:var(--accent-ink);font-size:.72rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase;transition:transform .35s cubic-bezier(.2,.8,.2,1),box-shadow .35s,filter .35s}
.btn:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(0,0,0,.18)}
.btn.ghost{background:transparent;color:var(--ink);box-shadow:inset 0 0 0 1px currentColor}
.btn.sm{padding:.5rem 1rem;font-size:.66rem}
.menu-btn{display:none;width:34px;height:34px;flex-direction:column;justify-content:center;gap:5px}
.menu-btn i{display:block;height:1.5px;background:currentColor;width:20px}

/* 故事段：钉住，往下滑换画面 */
.story{position:relative}
.stage{position:relative;height:100vh;height:100svh;overflow:hidden;background:var(--stage-bg,var(--bg))}
.shots{position:absolute;inset:0}
.shot{position:absolute;inset:0;opacity:0;will-change:opacity,transform;background:var(--sbg,var(--stage-bg,var(--bg)))}
.shot:first-child{opacity:1}
.shot img{width:100%;height:100%;object-fit:var(--fit,cover);object-position:var(--pos,100% 50%)}
.shot.full img{object-position:var(--pos,70% 50%)}
.shot .float{position:absolute;inset:0;animation:float 7s ease-in-out infinite}
@keyframes float{0%,100%{transform:translate3d(0,0,0) scale(1.0)}50%{transform:translate3d(0,-1.1%,0) scale(1.012)}}
.veil{position:absolute;inset:0;pointer-events:none;background:var(--veil,none)}
.copy{position:absolute;left:var(--pad);top:50%;transform:translateY(-46%);width:min(44vw,620px);z-index:3}
.step{position:absolute;left:0;top:0;width:100%;transform:translateY(-50%)}
.step:not(:first-child){opacity:0;visibility:hidden}
.eyebrow{font-size:.7rem;font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:var(--ink2);margin-bottom:1rem}
.h{font-family:var(--display);font-size:var(--h-size);font-weight:var(--h-weight);line-height:var(--h-line);letter-spacing:var(--h-track);text-transform:var(--h-case)}
.h em{font-style:italic;color:var(--em,inherit)}
.lede{max-width:28em;margin-top:1.1rem;color:var(--ink2);font-size:.92rem}
.step .btn{margin-top:1.6rem}
.h .w{display:inline-block;overflow:hidden;vertical-align:top}
.h .w>span{display:inline-block}
.dots{position:absolute;z-index:4;display:flex;gap:.55rem;left:50%;bottom:1.6rem;transform:translateX(-50%)}
.dots i{width:7px;height:7px;border-radius:99px;box-shadow:inset 0 0 0 1px var(--ink);transition:all .4s}
.dots i.on{background:var(--ink);width:22px}
.rail{position:absolute;z-index:4;left:calc(var(--pad)*.45);top:50%;transform:translateY(-50%);display:flex;flex-direction:column;gap:.5rem}
.rail i{width:5px;height:5px;border-radius:99px;background:var(--ink);opacity:.25;transition:all .4s}
.rail i.on{opacity:1;height:16px}
.arrow{position:absolute;z-index:4;right:calc(var(--pad)*.6);top:50%;width:40px;height:40px;border-radius:99px;display:grid;place-items:center;color:var(--ink);opacity:.6;transition:opacity .3s,transform .3s}
.arrow:hover{opacity:1;transform:translateX(3px)}
.vtag{position:absolute;z-index:4;right:0;top:50%;transform:translateY(-50%) rotate(180deg);writing-mode:vertical-rl;font-size:.6rem;letter-spacing:.24em;text-transform:uppercase;padding:.9rem .45rem;background:color-mix(in srgb,var(--bg) 92%,#fff);border-radius:0 6px 6px 0;box-shadow:0 2px 10px rgba(0,0,0,.06)}
.chat{position:fixed;z-index:60;right:1.2rem;bottom:1.2rem;width:44px;height:44px;border-radius:99px;background:var(--chat-bg,var(--ink));color:var(--chat-ink,var(--bg));display:grid;place-items:center;box-shadow:0 10px 24px rgba(0,0,0,.25);transition:transform .3s}
.chat:hover{transform:scale(1.08)}
.scrollhint{position:absolute;z-index:4;left:50%;bottom:1.1rem;transform:translateX(-50%);font-size:.62rem;letter-spacing:.3em;text-transform:uppercase;color:var(--ink2);display:flex;flex-direction:column;align-items:center;gap:.4rem}
.scrollhint:after{content:"";width:1px;height:26px;background:currentColor;animation:hint 1.8s ease-in-out infinite;transform-origin:top}
@keyframes hint{0%{transform:scaleY(0)}50%{transform:scaleY(1)}100%{transform:scaleY(0);transform-origin:bottom}}

/* 下面的区块 */
.sec{padding:clamp(4rem,9vw,8rem) var(--pad);position:relative}
.sec-head{display:flex;justify-content:space-between;align-items:end;gap:2rem;margin-bottom:clamp(2rem,4vw,3.2rem)}
.sec-head .h{--h-size:clamp(2rem,4vw,3.4rem)}
.sec-head p{max-width:26em;color:var(--ink2)}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(.8rem,1.6vw,1.4rem)}
.card{position:relative;border-radius:var(--card-r,14px);overflow:hidden;background:color-mix(in srgb,var(--bg) 80%,#fff);transition:transform .6s cubic-bezier(.2,.8,.2,1),box-shadow .6s}
.card:hover{transform:translateY(-6px);box-shadow:0 24px 50px rgba(0,0,0,.14)}
.card .ph{aspect-ratio:4/3.4;overflow:hidden}
.card .ph img{width:100%;height:100%;object-fit:cover;transition:transform 1.2s cubic-bezier(.2,.8,.2,1)}
.card:hover .ph img{transform:scale(1.06)}
.card .meta{display:flex;justify-content:space-between;align-items:center;padding:1rem 1.1rem 1.15rem}
.card h3{font-family:var(--display);font-weight:var(--h-weight);font-size:1.25rem;line-height:1.15}
.card .meta small{display:block;color:var(--ink2);font-size:.78rem;margin-top:.2rem}
.price{font-weight:600;font-size:.95rem;white-space:nowrap}
.add{width:34px;height:34px;border-radius:99px;background:var(--accent);color:var(--accent-ink);display:grid;place-items:center;font-size:1.1rem;transition:transform .3s}
.add:hover{transform:rotate(90deg)}
.split{display:grid;grid-template-columns:1.05fr 1fr;gap:clamp(2rem,5vw,5rem);align-items:center}
.split .ph{border-radius:var(--card-r,14px);overflow:hidden;aspect-ratio:5/4}
.split .ph img{width:100%;height:100%;object-fit:cover}
.stats{display:flex;gap:clamp(1.5rem,4vw,3.5rem);margin-top:2rem}
.stats b{display:block;font-family:var(--display);font-size:clamp(1.8rem,3vw,2.6rem);font-weight:var(--h-weight);line-height:1}
.stats span{font-size:.75rem;color:var(--ink2);letter-spacing:.06em}
.marquee{overflow:hidden;white-space:nowrap;border-block:1px solid var(--line);padding:1.1rem 0}
.marquee div{display:inline-flex;gap:3rem;animation:mq 26s linear infinite;font-family:var(--display);font-size:clamp(1.4rem,3vw,2.4rem);text-transform:var(--h-case)}
.marquee div span:nth-child(even){opacity:.35}
@keyframes mq{to{transform:translateX(-50%)}}
.cta-band{text-align:center}
.cta-band .h{--h-size:clamp(2.2rem,5vw,4.4rem)}
.cta-band p{max-width:30em;margin:1rem auto 1.8rem;color:var(--ink2)}
.foot{padding:2.4rem var(--pad) 5.5rem;display:flex;flex-wrap:wrap;justify-content:space-between;gap:1rem;border-top:1px solid var(--line);font-size:.78rem;color:var(--ink2)}
.foot a{text-decoration:underline;text-underline-offset:3px}
.reveal{opacity:0;transform:translateY(40px)}

/* 手机 */
@media (max-width:820px){
  .links,.topbar,.tools .hide-m{display:none}
  .has-topbar .nav{top:0}
  .menu-btn{display:flex}
  .nav{grid-template-columns:1fr auto}
  .copy{left:var(--pad);right:var(--pad);width:auto;top:6.2rem;transform:none}
  .step{transform:none}
  .shot img{position:absolute;left:0;bottom:0;height:var(--img-h-m,60%);object-fit:cover;object-position:var(--pos-m,84% 50%);-webkit-mask-image:linear-gradient(transparent,#000 22%);mask-image:linear-gradient(transparent,#000 22%)}
  .shot.full img{-webkit-mask-image:none;mask-image:none}
  .shot.full img{height:100%}
  .veil{background:var(--veil-m,linear-gradient(180deg,color-mix(in srgb,var(--stage-bg,var(--bg)) 86%,transparent) 0%,color-mix(in srgb,var(--stage-bg,var(--bg)) 40%,transparent) 42%,transparent 62%))}
  .lede{font-size:.86rem}
  .grid{grid-template-columns:1fr 1fr}
  .grid .card:nth-child(3){grid-column:1/-1}
  .card .meta{flex-wrap:wrap;gap:.35rem .6rem;padding:.8rem .85rem .9rem}
  .card .meta>div{flex:1 1 100%}
  .card h3{font-size:1.05rem}
  .split{grid-template-columns:1fr}
  .sec-head{flex-direction:column;align-items:start}
  .vtag,.arrow{display:none}
  .rail{left:.45rem}
}
@media (prefers-reduced-motion:reduce){.shot .float,.marquee div,.scrollhint:after{animation:none}}
/* Grok 影片序列 */
.seqbox{position:absolute;inset:0;z-index:1;background:var(--stage-bg,var(--bg))}
.seqbox canvas{width:100%;height:100%;display:block}
.has-seq .shots{visibility:hidden}
@media (max-width:820px){.has-seq .stage:after{content:"";position:absolute;left:0;right:0;top:0;height:52%;z-index:2;pointer-events:none;background:linear-gradient(180deg,var(--veil-c,var(--bg)) 0%,color-mix(in srgb,var(--veil-c,var(--bg)) 85%,transparent) 55%,transparent)}}