/* YISHU LABS home. Light by default, follows the system for dark mode. */
:root{
  --bg:#fafafa;--surface:#fff;--surface-2:#f3f5f7;--text:#0a0f1a;--muted:#5b6475;--faint:#8a93a3;
  --line:rgba(10,15,26,.09);--line-strong:rgba(10,15,26,.16);
  --accent:#0e9aa7;--accent-2:#5b6cff;--accent-ink:#087f8a;
  --live:#0a7d4f;--live-bg:#e3f6ec;--beta:#9a6200;--beta-bg:#fdf1d7;--dev:#5546c9;--dev-bg:#ecebfd;
  --shadow:0 1px 2px rgba(10,15,26,.04),0 8px 24px rgba(10,15,26,.06);
  --shadow-lg:0 2px 4px rgba(10,15,26,.04),0 24px 48px rgba(10,15,26,.10);
  --nav-bg:rgba(250,250,250,.72);
  --r:20px;--r-sm:12px;--content:min(1160px,calc(100% - 40px));
  color-scheme:light dark;
}
@media (prefers-color-scheme:dark){
  :root{
    --bg:#07090d;--surface:#0e1218;--surface-2:#141a22;--text:#f3f5f8;--muted:#9ba5b6;--faint:#6d7787;
    --line:rgba(255,255,255,.09);--line-strong:rgba(255,255,255,.18);
    --accent:#2fd0dc;--accent-2:#8b96ff;--accent-ink:#5fe0ea;
    --live:#4ade80;--live-bg:rgba(74,222,128,.12);--beta:#fbbf24;--beta-bg:rgba(251,191,36,.12);--dev:#a5a0ff;--dev-bg:rgba(165,160,255,.13);
    --shadow:0 1px 2px rgba(0,0,0,.4),0 8px 24px rgba(0,0,0,.35);
    --shadow-lg:0 2px 4px rgba(0,0,0,.4),0 24px 48px rgba(0,0,0,.5);
    --nav-bg:rgba(7,9,13,.7);
  }
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:76px;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,"SF Pro Text","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;line-height:1.6;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
a{color:inherit}
img{max-width:100%}
h1,h2,h3,p{margin:0}
.wrap{width:var(--content);margin-inline:auto}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:-999px;top:8px;background:var(--surface);padding:8px 12px;border-radius:8px;z-index:50}
.skip:focus{left:8px}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}

/* Nav */
.top{position:sticky;top:0;z-index:20;background:var(--nav-bg);backdrop-filter:saturate(180%) blur(16px);-webkit-backdrop-filter:saturate(180%) blur(16px);border-bottom:1px solid var(--line)}
.nav{width:var(--content);margin-inline:auto;display:flex;align-items:center;gap:24px;height:60px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;letter-spacing:.01em;text-decoration:none;white-space:nowrap}
.brand img{border-radius:8px}
.brand small{font-weight:500;color:var(--muted);margin-left:2px;font-size:.9em}
.nav-links{display:flex;gap:4px;margin-left:auto}
.nav-links a{font-size:14px;color:var(--muted);text-decoration:none;padding:7px 12px;border-radius:999px;transition:color .15s,background .15s}
.nav-links a:hover{color:var(--text);background:var(--surface-2)}
.languages{display:flex;padding:3px;border-radius:999px;background:var(--surface-2);border:1px solid var(--line)}
.languages button{font:inherit;font-size:12.5px;font-weight:600;color:var(--muted);background:transparent;border:0;border-radius:999px;padding:4px 10px;cursor:pointer}
.languages button[aria-pressed="true"]{background:var(--surface);color:var(--text);box-shadow:0 1px 2px rgba(0,0,0,.12)}

/* Hero */
.hero{position:relative;overflow:hidden;padding:104px 0 88px;text-align:center}
.hero::after{content:"";position:absolute;inset:0;z-index:0;background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:56px 56px;-webkit-mask-image:radial-gradient(ellipse 70% 60% at 50% 30%,#000 20%,transparent 75%);mask-image:radial-gradient(ellipse 70% 60% at 50% 30%,#000 20%,transparent 75%);pointer-events:none}
.aurora{position:absolute;inset:0;z-index:0;filter:blur(72px);opacity:.42;pointer-events:none;-webkit-mask-image:linear-gradient(#000 35%,transparent 92%);mask-image:linear-gradient(#000 35%,transparent 92%)}
.aurora i{position:absolute;border-radius:50%}
.aurora i:nth-child(1){width:480px;height:480px;left:calc(50% - 520px);top:-180px;background:#2dd4bf}
.aurora i:nth-child(2){width:520px;height:520px;left:calc(50% + 40px);top:-220px;background:#6d7cff}
.aurora i:nth-child(3){width:360px;height:360px;left:calc(50% - 180px);top:120px;background:#f0abfc;opacity:.5}
@media (prefers-color-scheme:dark){.aurora{opacity:.32}}
.hero-inner{position:relative;z-index:1}
.pill{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--muted);padding:6px 14px;border-radius:999px;background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow)}
.dot{width:7px;height:7px;border-radius:50%;background:#22c55e;box-shadow:0 0 0 4px rgba(34,197,94,.18)}
.hero h1{margin:26px auto 0;max-width:13em;font-size:clamp(40px,7.4vw,84px);line-height:1.04;font-weight:800;letter-spacing:-.035em}
:lang(zh-CN) .hero h1,:lang(zh-TW) .hero h1{letter-spacing:-.01em;line-height:1.12}
.grad{background:linear-gradient(100deg,var(--accent) 10%,var(--accent-2) 90%);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{margin:22px auto 0;max-width:34em;font-size:clamp(17px,2vw,20px);color:var(--muted)}
.cta{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:34px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;font-weight:600;font-size:15px;text-decoration:none;padding:11px 20px;border-radius:999px;border:1px solid transparent;transition:transform .15s,box-shadow .15s,background .15s}
.btn:hover{transform:translateY(-1px)}
.btn.primary{background:var(--text);color:var(--bg);box-shadow:var(--shadow)}
.btn.ghost{background:var(--surface);color:var(--text);border-color:var(--line-strong)}
.icons{list-style:none;display:flex;justify-content:center;gap:14px;margin:52px 0 0;padding:0}
.icons img{width:64px;height:64px;border-radius:16px;border:1px solid var(--line);box-shadow:var(--shadow-lg);background:var(--surface);object-fit:cover}
.icons li:nth-child(odd){transform:translateY(8px) rotate(-4deg)}
.icons li:nth-child(even){transform:translateY(-4px) rotate(3deg)}

/* Sections */
.section{padding:88px 0}
.sec-head{max-width:860px;margin-bottom:36px}
h1,h2,h3{text-wrap:balance}
.sub{max-width:44em}
.kicker{font-size:13px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--accent-ink)}
.sec-head h2{margin-top:10px;font-size:clamp(28px,4.2vw,44px);line-height:1.12;font-weight:750;letter-spacing:-.025em}
:lang(zh-CN) h2,:lang(zh-TW) h2{letter-spacing:-.005em;line-height:1.25}
.sub{margin-top:14px;font-size:17px;color:var(--muted)}

/* Product index */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:20px}
.card{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow);transition:transform .2s,box-shadow .2s,border-color .2s}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:var(--line-strong)}
.vis{position:relative;height:270px;display:flex;justify-content:center;align-items:flex-start;overflow:hidden;background:linear-gradient(135deg,var(--a1),var(--a2))}
.vis::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 20% 0,rgba(255,255,255,.35),transparent 55%)}
.phone{position:relative;width:min(62%,214px);margin-top:30px;padding:6px 6px 0;border-radius:32px 32px 0 0;background:#0b0f17;box-shadow:0 18px 44px rgba(0,0,0,.34);transition:transform .3s cubic-bezier(.2,.7,.2,1)}
.phone img{display:block;width:100%;height:auto;border-radius:26px 26px 0 0}
.card:hover .phone{transform:translateY(-8px)}
.card-body{display:flex;flex-direction:column;gap:14px;padding:20px;flex:1}
.card-head{display:flex;gap:13px;align-items:center}
.icon{width:52px;height:52px;border-radius:13px;flex:none;object-fit:cover;border:1px solid var(--line);background:var(--surface-2)}
.card h3{font-size:19px;line-height:1.25;font-weight:700;letter-spacing:-.01em}
.tagline{margin-top:2px;font-size:13.5px;color:var(--accent-ink);font-weight:600}
.desc{color:var(--muted);font-size:15px;flex:1}
.meta{display:flex;flex-wrap:wrap;gap:6px}
.badge,.plat{font-size:12px;padding:3px 10px;border-radius:999px}
.badge{font-weight:700}
.badge.live{color:var(--live);background:var(--live-bg)}
.badge.beta{color:var(--beta);background:var(--beta-bg)}
.badge.dev,.badge.soon{color:var(--dev);background:var(--dev-bg)}
.plat{color:var(--muted);background:var(--surface-2);border:1px solid var(--line)}
.link{display:inline-flex;align-items:center;gap:6px;font-weight:600;font-size:15px;text-decoration:none;color:var(--text)}
.link::after{content:"→";transition:transform .15s}
.link:hover::after{transform:translateX(3px)}
.soon{font-size:14px;color:var(--faint)}
.card.more{grid-column:1/-1;flex-direction:row;border-style:dashed;background:transparent;box-shadow:none;justify-content:center;align-items:center;gap:14px;padding:22px 24px;color:var(--muted)}
.card.more h3{font-size:16px}
.card.more .desc{flex:none;font-size:14.5px}
.card.more:hover{transform:none;box-shadow:none}
.card.more .plus{display:grid;place-items:center;flex:none;width:36px;height:36px;border-radius:50%;border:1px dashed var(--line-strong);font-size:20px;line-height:1;color:var(--faint)}

/* Services bento */
.bento{display:grid;grid-template-columns:repeat(6,1fr);gap:20px}
.tile{position:relative;display:flex;flex-direction:column;gap:10px;padding:26px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);transition:border-color .2s,transform .2s}
.tile:hover{border-color:var(--line-strong);transform:translateY(-2px)}
.t-web,.t-client{grid-column:span 3}
.t-team,.t-doc,.t-app{grid-column:span 2}
.t-case{grid-column:1/-1}
.ico{display:grid;place-items:center;width:42px;height:42px;border-radius:12px;background:linear-gradient(135deg,color-mix(in srgb,var(--accent) 16%,transparent),color-mix(in srgb,var(--accent-2) 16%,transparent));margin-bottom:6px}
.ico svg{width:21px;height:21px;fill:none;stroke:var(--accent-ink);stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
.tile h3{font-size:20px;line-height:1.3;font-weight:700;letter-spacing:-.01em}
.t-team h3,.t-doc h3,.t-app h3{font-size:18px}
.tile .tag{font-size:13.5px;font-weight:600;color:var(--accent-ink)}
.tile p{color:var(--muted);font-size:15px}
.t-case{flex-direction:row;align-items:center;gap:32px;padding:32px;background:linear-gradient(135deg,color-mix(in srgb,var(--accent) 9%,var(--surface)),color-mix(in srgb,var(--accent-2) 9%,var(--surface)))}
.case-text{flex:1 1 320px;display:flex;flex-direction:column;gap:10px}
.case-text h3{font-size:24px}
.flow{flex:1 1 420px;display:flex;align-items:center;justify-content:center;gap:10px}
.flow>svg{flex:none;width:20px;height:20px;fill:none;stroke:var(--faint);stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.flow-card{flex:1 1 0;min-width:0;display:flex;flex-direction:column;gap:7px;padding:14px;border-radius:14px;background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow);font-size:12.5px}
.flow-card b{font-size:13px}
.flow-card .l{height:6px;border-radius:3px;background:var(--surface-2)}
.w80{width:80%}.w60{width:60%}.w70{width:70%}
.flow-card .kv{display:flex;align-items:center;gap:8px}
.flow-card .kv i{font-style:normal;color:var(--muted);flex:none}
.flow-card .kv u{flex:1;height:6px;border-radius:3px;background:color-mix(in srgb,var(--accent) 35%,transparent)}
.flow-card.hi{border-color:color-mix(in srgb,var(--accent) 45%,transparent)}
.flow-card.ok{border-color:color-mix(in srgb,#22c55e 45%,transparent)}
.flow-card .chk{color:var(--live);font-weight:600}
.flow-card .chk em{font-style:normal}

/* Process */
.steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:20px;counter-reset:s}
.step{position:relative;padding:26px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow)}
.num{display:block;font-size:44px;line-height:1;font-weight:800;letter-spacing:-.04em;background:linear-gradient(100deg,var(--accent),var(--accent-2));-webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:18px}
.step h3{font-size:19px;font-weight:700;margin-bottom:6px}
.step p{color:var(--muted);font-size:15px}

/* Contact */
.contact{position:relative;overflow:hidden;display:flex;flex-wrap:wrap;gap:36px;align-items:center;padding:48px;border-radius:28px;color:#f3f5f8;background:radial-gradient(120% 140% at 0% 0%,#0f5560 0%,#0b1220 55%,#12103a 100%)}
.contact::before{content:"";position:absolute;width:420px;height:420px;right:-120px;top:-160px;border-radius:50%;background:#6d7cff;filter:blur(90px);opacity:.35}
.contact-copy{position:relative;flex:1 1 380px;display:flex;flex-direction:column;align-items:flex-start;gap:14px}
.contact .kicker{color:#7fe3ea}
.contact h2{font-size:clamp(26px,3.6vw,38px);line-height:1.2;font-weight:750;letter-spacing:-.02em}
.contact p{color:#c3cbd8;font-size:16px}
.contact .btn.primary{background:#fff;color:#0a0f1a;margin-top:6px}
.contact .btn svg{width:17px;height:17px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.qrs{position:relative;display:flex;gap:16px;flex:0 1 auto}
.qr{margin:0;padding:12px 12px 10px;border-radius:18px;background:#fff;color:#0a0f1a;text-align:center;box-shadow:0 16px 40px rgba(0,0,0,.35)}
.qr img{display:block;width:168px;height:168px;object-fit:contain;border-radius:8px}
.qr figcaption{margin-top:8px;font-size:13.5px;font-weight:700}

/* Footer */
.footer{border-top:1px solid var(--line);padding:28px 0 40px;color:var(--muted);font-size:14px}
.foot{display:flex;flex-wrap:wrap;gap:10px 24px;align-items:center}
.foot-brand{display:flex;align-items:center;gap:10px;color:var(--text)}
.foot-brand img{border-radius:7px}
.foot-link{font-weight:600;color:var(--text);text-decoration:none;border-bottom:1px solid var(--line-strong)}
.foot-link:hover{border-color:var(--text)}
.copy{margin-left:auto}

/* Scroll reveal (only when JS is running) */
.js .reveal{opacity:0;transform:translateY(12px);transition:opacity .4s ease,transform .4s cubic-bezier(.2,.7,.2,1)}
.js .reveal.in{opacity:1;transform:none}

@media (max-width:900px){
  .bento{grid-template-columns:repeat(2,1fr)}
  .t-web,.t-client,.t-team,.t-doc{grid-column:span 1}
  .t-app,.t-case{grid-column:1/-1}
  .t-case{flex-direction:column;align-items:stretch}
  .flow{flex-basis:auto}
  .steps{grid-template-columns:1fr}
}
@media (max-width:720px){
  .brand small{display:none}
  .nav-links{display:none}
  .languages{margin-left:auto}
  .hero{padding:72px 0 60px}
  .section{padding:60px 0}
  .bento{grid-template-columns:1fr}
  .t-web,.t-client,.t-team,.t-doc,.t-app{grid-column:1/-1}
  .grid{grid-template-columns:1fr}
  .card.more{flex-direction:column;text-align:center;gap:6px}
  .contact{padding:28px 22px;border-radius:22px}
  .qrs{width:100%;justify-content:center}
  .qr img{width:132px;height:132px}
  .flow{flex-direction:column}
  .flow>svg{transform:rotate(90deg)}
  .flow-card{width:100%}
  .copy{margin-left:0}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .js .reveal{opacity:1;transform:none;transition:none}
  .card,.tile,.btn,.phone{transition:none}
}