:root{
  --bg:#0E0E10; --bg2:#141417; --panel:#1B1B1F; --line:#2E2E34; --red:#E4393C; --red2:#FF5A5D;
  --white:#fff; --gray:#A1A1AA; --dim:#7B7B84;
  --font:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Noto Sans CJK SC","Source Han Sans SC",system-ui,sans-serif;
  --num:"Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:72px}
body{background:var(--bg);color:var(--white);font-family:var(--font);font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px}
section{padding:110px 0}
h2{font-size:clamp(28px,4vw,42px);line-height:1.3;font-weight:800;margin-bottom:28px}
h3{font-size:20px;line-height:1.4;font-weight:700}
.eyebrow{color:var(--red);font-size:13px;font-weight:700;letter-spacing:3px;margin-bottom:14px}
.muted{color:var(--gray)} .muted strong{color:var(--white)}
.red{color:var(--red)}
.note{color:var(--dim);font-size:13px;margin-top:18px}
.num{color:var(--red);font-family:var(--num);font-weight:800;font-size:15px;letter-spacing:1px;margin-bottom:8px}

/* nav */
.nav{position:fixed;inset:0 0 auto;z-index:50;transition:background .25s,border-color .25s;border-bottom:1px solid transparent}
.nav.solid{background:rgba(14,14,16,.92);backdrop-filter:blur(10px);border-color:var(--line)}
.nav-in{height:72px;display:flex;align-items:center;justify-content:space-between}
.brand img{height:28px;width:auto}
.nav-links{display:flex;gap:34px;align-items:center;font-size:15px}
.nav-links a{color:#d8d8dc;transition:color .2s}
.nav-links a:hover{color:var(--white)}
.nav-cta{background:var(--red);color:#fff!important;padding:8px 18px;border-radius:999px}
.nav-toggle{display:none;background:none;border:0;width:40px;height:40px;cursor:pointer;position:relative}
.nav-toggle span{position:absolute;left:9px;right:9px;height:2px;background:#fff;transition:transform .25s}
.nav-toggle span:first-child{top:15px}.nav-toggle span:last-child{top:24px}
.nav.open .nav-toggle span:first-child{transform:translateY(4.5px) rotate(45deg)}
.nav.open .nav-toggle span:last-child{transform:translateY(-4.5px) rotate(-45deg)}

/* hero */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;padding:120px 0 80px;overflow:hidden}
.hero-img{position:absolute;inset:0 0 0 42%;background:url(../assets/img/cover-art.jpg) center bottom/contain no-repeat;
  -webkit-mask-image:radial-gradient(ellipse 60% 70% at 55% 60%,#000 55%,transparent 100%);mask-image:radial-gradient(ellipse 60% 70% at 55% 60%,#000 55%,transparent 100%)}
.hero-in{position:relative;width:100%}
.hero h1{font-size:clamp(48px,8vw,96px);line-height:1.08;font-weight:900;margin-bottom:26px}
.pills{display:flex;gap:10px;margin-bottom:22px;flex-wrap:wrap}
.pills span{background:var(--panel);border:1px solid var(--line);border-radius:999px;padding:6px 18px;font-weight:700;font-size:15px}
.pills span.on{background:var(--red);border-color:var(--red)}
.hero .lead{max-width:560px;font-size:18px;color:#cfcfd4;margin-bottom:40px}
.hero .lead strong{color:#fff}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-block;padding:14px 30px;border-radius:999px;font-weight:700;font-size:16px;transition:transform .2s,background .2s}
.btn:hover{transform:translateY(-2px)}
.btn-red{background:var(--red)}.btn-red:hover{background:var(--red2)}
.btn-ghost{border:1px solid #55555c}

/* stats */
.stats{padding:0 0 90px}
.stat-grid{list-style:none;display:grid;grid-template-columns:repeat(4,1fr);gap:32px}
.stat-grid li{border-top:1px solid var(--line);padding-top:22px}
.stat-grid b,.kpis b{font-family:var(--num);font-size:clamp(40px,5vw,60px);font-weight:800;line-height:1}
.stat-grid i,.kpis i{font-style:normal;color:var(--red);font-weight:700;font-size:20px;margin-left:4px}
.stat-grid span,.kpis span{display:block;color:var(--gray);margin-top:10px;font-size:15px}

/* why */
.why-sec{background:var(--bg2)}
.sol-lead{max-width:820px;font-size:18px;margin:-8px 0 44px}
.chain{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.chain article{background:var(--panel);border-radius:14px;padding:30px}
.chain b{font-family:var(--num);color:var(--red);font-size:28px}
.chain h3{margin:10px 0 8px;font-size:22px}
.chain p{color:var(--gray);font-size:15px}
.chain .hot{background:var(--red)} .chain .hot b,.chain .hot p{color:#fff}

/* services */
.svc{display:grid;grid-template-columns:1.1fr 1fr;gap:56px;align-items:center;margin-top:64px}
.svc.rev .svc-img{order:2}
.svc-img{border-radius:16px;overflow:hidden;aspect-ratio:16/10;background:var(--panel)}
.svc-img img{width:100%;height:100%;object-fit:cover;transition:transform .6s}
.svc:hover .svc-img img{transform:scale(1.03)}
.svc-txt h3{font-size:32px;font-weight:900;margin-bottom:14px}
.svc-txt .muted{font-size:16px;margin-bottom:20px}
.tags{list-style:none;display:flex;flex-wrap:wrap;gap:8px}
.tags li{background:#2A1416;color:#ff8a8c;border-radius:999px;padding:5px 14px;font-size:14px;font-weight:700}

/* scenes */
.scenes{background:var(--bg2)}
.sc-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:12px}
.sc-grid figure{position:relative;border-radius:10px;overflow:hidden;aspect-ratio:4/3}
.sc-grid img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.sc-grid figure:hover img{transform:scale(1.06)}
.sc-grid figcaption{position:absolute;left:0;right:0;bottom:0;padding:18px 12px 8px;font-size:13px;font-weight:700;background:linear-gradient(transparent,rgba(0,0,0,.75))}
.xm{display:grid;grid-template-columns:280px 1fr;gap:48px;align-items:center;margin-top:72px;background:var(--panel);border-radius:18px;padding:36px}
.xm img{border-radius:12px;width:100%}
.xm h3{font-size:28px;margin-bottom:12px}
.kpis{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:28px}
.kpis b.t{font-family:var(--font);font-size:26px}

/* ai */
.ai-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.ai-grid article{background:var(--panel);border-radius:14px;overflow:hidden;padding-bottom:22px}
.ai-grid img{width:100%;aspect-ratio:2/1;object-fit:cover;border-bottom:1px solid var(--line)}
.ai-grid h3{margin:18px 22px 8px}
.ai-grid p{margin:0 22px;color:var(--gray);font-size:15px}

/* brands */
.brands{background:var(--bg2)}
.wall>div{display:grid;grid-template-columns:110px 1fr;gap:20px;align-items:center;padding:14px 0;border-bottom:1px solid var(--line)}
.wall h4{color:var(--red);font-size:16px}
.wall p{display:flex;flex-wrap:wrap;gap:10px}
.wall span{width:128px;height:72px;background:var(--panel);border-radius:10px;display:flex;align-items:center;justify-content:center;padding:14px 16px;transition:background .2s}
.wall span:hover{background:#26262c}
.wall span img{max-width:100%;max-height:100%;object-fit:contain;opacity:.92}
.wall span.txt{font-weight:800;font-size:16px}

/* process */
.steps{list-style:none;display:grid;grid-template-columns:repeat(5,1fr);gap:16px;margin-bottom:22px}
.steps li{background:var(--panel);border-radius:14px;padding:28px 24px}
.steps li:last-child{background:var(--red)}
.steps b{font-family:var(--num);color:var(--red);font-size:28px}
.steps li:last-child b,.steps li:last-child p{color:#fff}
.steps h3{margin:12px 0 6px}
.steps p{color:var(--gray);font-size:15px}
.cadence{color:var(--gray);background:var(--panel);border-radius:14px;padding:20px 26px}
.cadence strong{color:var(--red);margin-right:14px}

/* contact */
.contact{background:var(--bg2)}
.contact-in{display:grid;grid-template-columns:1.4fr 1fr;gap:56px;align-items:center}
.contact h2{font-size:clamp(34px,5vw,56px);margin-bottom:40px}
.contact dl{display:grid;grid-template-columns:80px 1fr;gap:14px 12px;font-size:17px}
.contact dt{color:var(--dim)}
.contact dd a:hover{color:var(--red)}
.qr{background:#fff;color:#111;border-radius:18px;padding:28px;text-align:center;justify-self:end;width:280px}
.qr img{margin:0 auto 12px;width:220px;height:220px}
.qr p{font-weight:700}

.foot{border-top:1px solid var(--line);padding:28px 0;color:var(--dim);font-size:13px}
.foot-in{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}
.foot a:hover{color:var(--white)}

.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}html{scroll-behavior:auto}}

@media (max-width:960px){
  section{padding:80px 0}
  .nav-toggle{display:block}
  .nav-links{position:fixed;top:72px;left:0;right:0;background:rgba(14,14,16,.98);flex-direction:column;gap:0;padding:8px 24px 24px;border-bottom:1px solid var(--line);display:none}
  .nav.open .nav-links{display:flex}
  .nav.open{background:rgba(14,14,16,.98)}
  .nav-links a{padding:14px 0;width:100%;border-bottom:1px solid var(--line)}
  .nav-cta{margin-top:16px;text-align:center;border:0!important}
  .hero{flex-direction:column;align-items:stretch;min-height:auto;padding:120px 0 0}
  .hero-img{position:relative;inset:auto;order:2;height:320px;width:100%;margin-top:24px;background-size:cover}
  .stats{padding-top:60px}
  .stat-grid{grid-template-columns:1fr 1fr}
  .chain,.ai-grid{grid-template-columns:1fr}
  .svc{grid-template-columns:1fr;gap:24px;margin-top:48px}
  .svc.rev .svc-img{order:0}
  .svc-txt h3{font-size:26px}
  .sc-grid{grid-template-columns:repeat(3,1fr)}
  .xm{grid-template-columns:1fr;padding:24px;gap:24px}
  .xm img{max-width:260px}
  .kpis{grid-template-columns:1fr 1fr}
  .wall>div{grid-template-columns:1fr;gap:10px}
  .wall span{width:calc(33.3% - 7px);height:62px}
  .steps{grid-template-columns:1fr 1fr}
  .contact-in{grid-template-columns:1fr}
  .qr{justify-self:start}
}
@media (max-width:480px){.steps{grid-template-columns:1fr}.sc-grid{grid-template-columns:repeat(2,1fr)}}

.svc-img.natural{aspect-ratio:auto;background:none}
.svc-img.natural img{height:auto}
.map-card{margin-top:56px;display:grid;grid-template-columns:auto 1fr auto;gap:28px;align-items:center;background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:28px 32px}
.map-pin{width:64px;height:64px;border-radius:50%;background:#2A1416;color:var(--red);display:flex;align-items:center;justify-content:center}
.map-txt h3{font-size:20px;margin-bottom:4px}
.map-btns{display:flex;gap:12px;flex-wrap:wrap}
.map-btns .btn{padding:12px 22px;font-size:15px}
@media (max-width:960px){.map-card{grid-template-columns:1fr;gap:16px;padding:24px}}

/* =========================================================
   v3 质感层：颗粒噪点 + 网格 + 红色光晕 + 玻璃卡片 + 3D 滚动
   ========================================================= */
body{background:#0B0B0D;overflow-x:hidden}
section{background:transparent!important;position:relative}
/* 固定背景：光晕球 */
.bg-fx{position:fixed;inset:0;z-index:-2;pointer-events:none;overflow:hidden;background:
  radial-gradient(1200px 700px at 85% -10%,rgba(228,57,60,.16),transparent 60%),
  radial-gradient(900px 600px at -10% 40%,rgba(120,40,60,.14),transparent 60%),
  linear-gradient(180deg,#0B0B0D 0%,#101014 50%,#0B0B0D 100%)}
.orb{position:absolute;border-radius:50%;filter:blur(90px);opacity:.38;will-change:transform}
.o1{width:520px;height:520px;background:#E4393C;top:-160px;right:-120px;animation:drift1 22s ease-in-out infinite}
.o2{width:420px;height:420px;background:#7a1c3a;bottom:10%;left:-160px;animation:drift2 26s ease-in-out infinite}
.o3{width:360px;height:360px;background:#3a1f6b;top:45%;right:10%;opacity:.22;animation:drift1 30s ease-in-out infinite reverse}
@keyframes drift1{0%,100%{transform:translate(0,0)}50%{transform:translate(-80px,120px)}}
@keyframes drift2{0%,100%{transform:translate(0,0)}50%{transform:translate(120px,-80px)}}
/* 细网格 + 胶片颗粒 */
body::before{content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(ellipse 80% 60% at 50% 30%,#000 30%,transparent 85%);mask-image:radial-gradient(ellipse 80% 60% at 50% 30%,#000 30%,transparent 85%)}
body::after{content:"";position:fixed;inset:-50%;z-index:100;pointer-events:none;opacity:.07;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='220' height='220'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  animation:grain 1.2s steps(6) infinite}
@keyframes grain{0%{transform:translate(0,0)}20%{transform:translate(-3%,2%)}40%{transform:translate(2%,-3%)}60%{transform:translate(-2%,3%)}80%{transform:translate(3%,1%)}100%{transform:translate(0,0)}}
/* 区块之间的光线分隔 */
section+section::before{content:"";position:absolute;top:0;left:50%;width:min(1100px,90%);height:1px;transform:translateX(-50%);
  background:linear-gradient(90deg,transparent,rgba(228,57,60,.55),transparent)}

/* 玻璃卡片 + 渐变描边 */
.chain article,.ai-grid article,.steps li,.cadence,.map-card,.wall span,.qr,.stat-grid li{
  background:linear-gradient(160deg,rgba(255,255,255,.06),rgba(255,255,255,.015))!important;
  border:1px solid rgba(255,255,255,.08);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  box-shadow:0 1px 0 rgba(255,255,255,.06) inset,0 24px 60px -24px rgba(0,0,0,.8);
  transform-style:preserve-3d}
.qr{background:#fff!important}
.chain .hot,.steps li:last-child{background:linear-gradient(150deg,#ff5457,#c8262a)!important;border-color:rgba(255,255,255,.18);box-shadow:0 30px 70px -25px rgba(228,57,60,.7)}
.stat-grid li{border-radius:16px;padding:26px 24px;border-top:1px solid rgba(255,255,255,.08)}
.wall>div{border-bottom-color:rgba(255,255,255,.06)}
/* 卡片内文字浮起（配合 3D 倾斜） */
.chain article>*,.ai-grid article>h3,.ai-grid article>p,.steps li>*,.stat-grid li>*{transform:translateZ(28px)}
/* 光泽扫过 */
.js-tilt-glare{border-radius:inherit}

/* 图片：立体投影 */
.svc-img{box-shadow:0 40px 80px -30px rgba(0,0,0,.9),0 0 0 1px rgba(255,255,255,.06);transform-style:preserve-3d}
.sc-grid figure{box-shadow:0 20px 40px -20px rgba(0,0,0,.9);transform-style:preserve-3d}

/* 标题渐变字 */
h2 .red{background:linear-gradient(90deg,#ff6a6c,#E4393C 60%,#ff9a7a);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero h1{background:linear-gradient(180deg,#fff 40%,#c9c9cf);-webkit-background-clip:text;background-clip:text;color:transparent}

/* ===== 3D 滚动入场：从下方带透视翻起 ===== */
.stage{perspective:1400px}
.r3d{opacity:0;transform:translate3d(0,80px,-120px) rotateX(18deg);transform-origin:50% 100%;
  transition:opacity .9s cubic-bezier(.2,.7,.2,1),transform 1.1s cubic-bezier(.2,.7,.2,1);will-change:transform,opacity}
.r3d.in{opacity:1;transform:none}
.r3d.from-l{transform:translate3d(-80px,40px,-80px) rotateY(16deg) rotateX(6deg)}
.r3d.from-r{transform:translate3d(80px,40px,-80px) rotateY(-16deg) rotateX(6deg)}
.r3d.from-l.in,.r3d.from-r.in{transform:none}
/* 滚动中区块的轻微纵深（JS 写入 --p，0~1） */
.depth{transform:perspective(1600px) rotateX(calc((var(--p,.5) - .5) * -6deg)) translateZ(0);transition:transform .2s linear}
.reveal{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  .orb,body::after{animation:none}
  .r3d,.r3d.from-l,.r3d.from-r{opacity:1;transform:none;transition:none}
  .depth{transform:none}
}
@media (max-width:960px){
  .orb{opacity:.28}
  .o3{display:none}
  body::after{opacity:.05}
}
html{overflow-x:hidden}
main,footer{overflow-x:clip}
@media (max-width:960px){.r3d.from-l,.r3d.from-r{transform:translate3d(0,60px,-80px) rotateX(14deg)}}