@font-face{font-family:"WS";src:url(/assets/fonts/sans.woff2) format("woff2");font-weight:100 900;font-display:swap;unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+20AC,U+2122,U+2190-2193,U+2212,U+FEFF}
@font-face{font-family:"WS";src:url(/assets/fonts/sc-Regular.woff2) format("woff2");font-weight:300 450;font-display:swap;unicode-range:U+2E80-9FFF,U+FF00-FFEF,U+3000-303F}
@font-face{font-family:"WS";src:url(/assets/fonts/sc-Medium.woff2) format("woff2");font-weight:451 550;font-display:swap;unicode-range:U+2E80-9FFF,U+FF00-FFEF,U+3000-303F}
@font-face{font-family:"WS";src:url(/assets/fonts/sc-Bold.woff2) format("woff2");font-weight:551 900;font-display:swap;unicode-range:U+2E80-9FFF,U+FF00-FFEF,U+3000-303F}
@font-face{font-family:"WM";src:url(/assets/fonts/mono.woff2) format("woff2");font-weight:400 800;font-display:swap;unicode-range:U+0000-00FF,U+2000-206F}
:root{
  --bg:#F4F2EE;--bg2:#ECEAE5;--card:#FAF9F6;--paper:#fff;
  --ink:#16181D;--ink2:#3C3E44;--mute:#6B6862;--faint:#A7A298;--line:#E2DED6;--line2:#D4D0C8;
  --acc:#D97557;--ok:#2F8F5B;--dark:#191B21;--dark2:#262930;
  --sans:"WS","PingFang SC","Microsoft YaHei UI","Microsoft YaHei",system-ui,sans-serif;
  --mono:"WM","Cascadia Mono",Consolas,"WS",monospace;
  --ease:cubic-bezier(.22,.8,.24,1);
  --r:14px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.65;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{display:block}
::selection{background:var(--ink);color:var(--bg)}
.wrap{max-width:1120px;margin:0 auto;padding:0 28px}
.narrow{max-width:760px}
.grain{position:fixed;inset:0;pointer-events:none;z-index:100;opacity:.035;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")}

/* 导航 */
.nav{position:sticky;top:0;z-index:50;transition:background .3s,border-color .3s,backdrop-filter .3s;border-bottom:1px solid transparent}
.nav.solid{background:rgba(244,242,238,.78);backdrop-filter:saturate(1.4) blur(14px);-webkit-backdrop-filter:saturate(1.4) blur(14px);border-color:var(--line)}
.nav-in{display:flex;align-items:center;height:64px;gap:32px}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:600;letter-spacing:-.01em}
.brand img{border-radius:7px}
.links{display:flex;gap:28px;margin-left:auto;font-size:14px;color:var(--mute)}
.links a{transition:color .2s}
.links a:hover{color:var(--ink)}

/* 按钮 */
.btn{display:inline-flex;align-items:center;gap:8px;height:46px;padding:0 22px;border-radius:999px;background:var(--ink);color:var(--bg);font-size:15px;font-weight:500;letter-spacing:.01em;transition:transform .25s var(--ease),box-shadow .25s var(--ease),background .2s;box-shadow:0 1px 0 rgba(255,255,255,.12) inset,0 6px 20px -8px rgba(22,24,29,.5)}
.btn:hover{transform:translateY(-1px);box-shadow:0 1px 0 rgba(255,255,255,.12) inset,0 12px 28px -10px rgba(22,24,29,.55)}
.btn svg{width:17px;height:17px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.btn-ghost{background:transparent;color:var(--ink);box-shadow:inset 0 0 0 1px var(--line2)}
.btn-ghost:hover{background:var(--card);box-shadow:inset 0 0 0 1px var(--faint)}
.btn-sm{height:36px;padding:0 16px;font-size:14px}

/* 首屏 */
.hero{position:relative;padding:96px 0 40px;text-align:center;overflow:hidden}
.dots{position:absolute;inset:-10% 0 auto;height:720px;background-image:radial-gradient(var(--line2) 1px,transparent 1.2px);background-size:22px 22px;-webkit-mask-image:radial-gradient(ellipse 60% 55% at 50% 30%,#000 20%,transparent 75%);mask-image:radial-gradient(ellipse 60% 55% at 50% 30%,#000 20%,transparent 75%);opacity:.8}
.hero-in{position:relative}
.eyebrow{display:inline-flex;align-items:center;gap:10px;padding:6px 14px 6px 12px;border:1px solid var(--line);border-radius:999px;background:rgba(250,249,246,.7);font-size:13px;color:var(--mute);font-family:var(--mono);letter-spacing:.02em}
.pulse{width:7px;height:7px;border-radius:50%;background:var(--ok);box-shadow:0 0 0 0 rgba(47,143,91,.45);animation:pulse 2.4s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(47,143,91,.45)}70%{box-shadow:0 0 0 8px rgba(47,143,91,0)}100%{box-shadow:0 0 0 0 rgba(47,143,91,0)}}
h1{margin:28px auto 0;font-size:clamp(40px,7vw,80px);line-height:1.08;font-weight:700;letter-spacing:-.035em}
h1 em{font-style:normal;color:transparent;background:linear-gradient(100deg,var(--ink) 20%,#5a5c63 55%,var(--ink) 90%);-webkit-background-clip:text;background-clip:text}
.lead{max-width:720px;margin:26px auto 0;font-size:clamp(16px,1.6vw,18.5px);color:var(--ink2);line-height:1.8}
.cta{display:flex;gap:12px;justify-content:center;margin-top:36px;flex-wrap:wrap}
.meta{margin-top:18px;font-size:13px;color:var(--faint);font-family:var(--mono);letter-spacing:.01em}

/* 示意窗口 */
.stage{margin:72px auto 0;max-width:980px;perspective:1600px}
.win{text-align:left;background:var(--card);border:1px solid var(--line);border-radius:18px;box-shadow:0 1px 0 #fff inset,0 40px 80px -40px rgba(22,24,29,.35),0 12px 24px -12px rgba(22,24,29,.12);overflow:hidden;transform:rotateX(8deg) scale(.97);transform-origin:50% 0;transition:transform 1.2s var(--ease)}
.stage.in .win{transform:none}
.win-bar{display:flex;align-items:center;gap:7px;height:42px;padding:0 16px;border-bottom:1px solid var(--line);background:var(--bg)}
.win-bar i{width:11px;height:11px;border-radius:50%;background:var(--line2)}
.win-bar span{margin-left:12px;font-size:12.5px;color:var(--mute);font-family:var(--mono)}
.win-body{display:grid;grid-template-columns:1fr 240px;min-height:360px}
.chat{padding:28px 30px;display:flex;flex-direction:column;gap:16px}
.msg{max-width:88%;opacity:0;transform:translateY(8px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.msg.on{opacity:1;transform:none}
.msg.me{align-self:flex-end;background:var(--ink);color:var(--bg);padding:12px 16px;border-radius:16px 16px 4px 16px;font-size:15px}
.msg.ai{display:flex;flex-direction:column;gap:6px;width:100%}
.tool{display:flex;align-items:center;gap:10px;padding:9px 12px;border:1px solid var(--line);border-radius:10px;background:var(--paper);font-family:var(--mono);font-size:12.5px;opacity:0;transform:translateX(-6px);transition:opacity .45s var(--ease),transform .45s var(--ease)}
.tool.on{opacity:1;transform:none}
.tool b{font-weight:600;color:var(--ink)}
.tool span{color:var(--mute);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:1}
.tool s{text-decoration:none;color:var(--ok);font-size:12px}
.tool s::before{content:"";display:inline-block;width:6px;height:6px;border-radius:50%;background:currentColor;margin-right:6px;vertical-align:1px}
.msg.ai.text{display:block}
.msg.text{font-size:15px;color:var(--ink2);line-height:1.75}
.msg.text b{color:var(--ink)}
code{font-family:var(--mono);font-size:.88em;background:var(--bg2);padding:2px 6px;border-radius:5px}
.side{border-left:1px solid var(--line);padding:24px 22px;background:linear-gradient(var(--bg),var(--card));display:flex;flex-direction:column;gap:14px}
.kv{display:flex;justify-content:space-between;font-size:13px;color:var(--mute)}
.kv b{font-weight:500;color:var(--ink);font-size:13px;font-variant-numeric:tabular-nums}
.kv b.ok{color:var(--ok)}
.bars{margin-top:auto;display:flex;align-items:flex-end;gap:6px;height:70px}
.bars i{flex:1;height:calc(var(--h)*100%);background:var(--ink);opacity:.85;border-radius:3px 3px 1px 1px;transform-origin:bottom;transform:scaleY(0);transition:transform 1s var(--ease)}
.stage.in .bars i{transform:scaleY(1)}
.bars i:nth-child(2){transition-delay:.06s}.bars i:nth-child(3){transition-delay:.12s}.bars i:nth-child(4){transition-delay:.18s}.bars i:nth-child(5){transition-delay:.24s}.bars i:nth-child(6){transition-delay:.3s}.bars i:nth-child(7){transition-delay:.36s;background:var(--acc)}

/* 适配 */
.works{padding:64px 0 24px}
.label{font-family:var(--mono);font-size:12.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--faint)}
.works .label{text-align:center}
.logos{list-style:none;display:flex;flex-wrap:wrap;justify-content:center;gap:14px 44px;margin-top:22px;font-size:19px;font-weight:600;letter-spacing:-.01em;color:var(--faint)}
.logos li{transition:color .2s}
.logos li:hover{color:var(--ink)}

/* 通用段落 */
.sec{padding:112px 0}
.sec-alt{background:var(--bg2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{margin-bottom:56px}
h2{margin-top:14px;font-size:clamp(30px,4.2vw,48px);line-height:1.15;font-weight:700;letter-spacing:-.03em}
h3{font-size:17px;font-weight:600;letter-spacing:-.01em}
.sub{margin-top:20px;font-size:17px;color:var(--ink2);max-width:520px;line-height:1.8}

.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.card{background:var(--card);padding:34px 30px 36px;transition:background .3s}
.card:hover{background:var(--paper)}
.card p{margin-top:10px;font-size:15px;color:var(--mute);line-height:1.75}
.ic{width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:var(--bg);display:grid;place-items:center;margin-bottom:22px}
.ic svg{width:20px;height:20px;fill:none;stroke:var(--ink);stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}

.steps{list-style:none;display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.steps li{position:relative;padding:30px 28px 32px;background:var(--card);border:1px solid var(--line);border-radius:var(--r)}
.steps .n{font-family:var(--mono);font-size:13px;color:var(--acc);letter-spacing:.06em}
.steps h3{margin-top:22px}
.steps p{margin-top:8px;font-size:15px;color:var(--mute)}

.split{display:grid;grid-template-columns:1fr 1.05fr;gap:64px;align-items:center}
.ticks{list-style:none;margin-top:28px;display:grid;gap:12px}
.ticks li{position:relative;padding-left:28px;font-size:15px;color:var(--ink2)}
.ticks li::before{content:"";position:absolute;left:2px;top:7px;width:14px;height:8px;border-left:1.8px solid var(--ink);border-bottom:1.8px solid var(--ink);transform:rotate(-45deg)}
.term{background:var(--dark);border-radius:16px;overflow:hidden;box-shadow:0 40px 80px -40px rgba(22,24,29,.6);border:1px solid #2b2e36}
.term-bar{display:flex;align-items:center;gap:7px;height:40px;padding:0 16px;border-bottom:1px solid #2b2e36;background:var(--dark2)}
.term-bar i{width:11px;height:11px;border-radius:50%;background:#3a3d46}
.term-bar span{margin-left:10px;font-size:12px;color:#8b8e97;font-family:var(--mono)}
.term pre{padding:24px 26px 28px;font-family:var(--mono);font-size:13.5px;line-height:1.85;color:#E6E4DF;overflow-x:auto}
.term code{background:none;padding:0;font-size:inherit}
.term .c{color:#6f727b}.term .p{color:var(--acc)}.term .g{color:#7BD3A1}

.facts{display:grid;grid-template-columns:repeat(4,1fr);gap:40px}
.facts b{display:block;font-size:17px;font-weight:600;padding-top:18px;border-top:1.5px solid var(--ink)}
.facts p{margin-top:10px;font-size:15px;color:var(--mute)}

.faq{border-top:1px solid var(--line2)}
.faq details{border-bottom:1px solid var(--line2)}
.faq summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;padding:24px 0;font-size:17px;font-weight:500}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"";width:12px;height:12px;flex:none;margin-left:20px;background:linear-gradient(var(--ink),var(--ink)) center/12px 1.5px no-repeat,linear-gradient(var(--ink),var(--ink)) center/1.5px 12px no-repeat;transition:transform .35s var(--ease)}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{padding:0 40px 24px 0;color:var(--mute);font-size:15.5px}

.final{text-align:center;padding:128px 0 136px}
.final-in img{margin:0 auto 28px;border-radius:15px;box-shadow:0 20px 40px -18px rgba(22,24,29,.5)}
.final .sub{margin:16px auto 0}

.foot{border-top:1px solid var(--line);padding:28px 0}
.foot-in{display:flex;justify-content:space-between;align-items:center;font-size:13px}
.foot .brand{font-size:14px}
.foot .brand img{border-radius:5px}
.muted{color:var(--faint);font-family:var(--mono)}

/* 进场动画 */
.js .reveal{opacity:0;transform:translateY(18px);transition:opacity .9s var(--ease),transform .9s var(--ease)}
.reveal.in{opacity:1;transform:none}
.grid .reveal:nth-child(3n+2),.steps .reveal:nth-child(2),.facts .reveal:nth-child(2){transition-delay:.08s}
.grid .reveal:nth-child(3n),.steps .reveal:nth-child(3),.facts .reveal:nth-child(3){transition-delay:.16s}
.facts .reveal:nth-child(4){transition-delay:.24s}
.hero .reveal:nth-child(2){transition-delay:.06s}.hero .reveal:nth-child(3){transition-delay:.14s}.hero .reveal:nth-child(4){transition-delay:.22s}.hero .reveal:nth-child(5){transition-delay:.28s}

@media (max-width:900px){
  .links{display:none}.nav-in .btn{margin-left:auto}
  .grid{grid-template-columns:1fr 1fr}
  .steps,.split{grid-template-columns:1fr}
  .split{gap:40px}
  .facts{grid-template-columns:1fr 1fr}
  .win-body{grid-template-columns:1fr}.side{display:none}
}
@media (max-width:600px){
  .wrap{padding:0 20px}
  .hero{padding-top:64px}
  .hide-s{display:none}
  .grid,.facts{grid-template-columns:1fr}
  .sec{padding:80px 0}
  .chat{padding:20px 16px}
  .msg{max-width:100%}
  .term pre{font-size:12px;padding:18px}
  .foot-in{flex-direction:column;gap:10px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal,.msg,.tool{opacity:1;transform:none}
  .win{transform:none}.bars i{transform:none}
}