:root{
  --bg:#FFFFFF; --bg2:#F7F5F2; --card:#FFFFFF; --ink:#16181D; --on-ink:#FFFFFF; --muted:#55555F; --faint:#8A8A94; --line:#E6E2DB;
  --accent:#EE5A24; --accent-text:#C2410C; --tint:#FFF1EC; --ok:#17803D; --ok-bg:#E7F6EC;
  --stage:#16181D; --stage-ink:#F7F5F2; --stage-muted:#B9B9C0; --stage-card:#22242A; --stage-line:#34363C; --stage-accent-text:#F49A73;
  --frame:#16181D; --shadow:0 24px 60px rgba(22,24,29,.12);
  color-scheme: light;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#131417; --bg2:#1A1B1F; --card:#202227; --ink:#F2F0EC; --on-ink:#131417; --muted:#B4B4BC; --faint:#8C8C96; --line:#33353B;
    --accent-text:#F49A73; --tint:#3A2419; --ok:#5CC98A; --ok-bg:#1B3325;
    --stage:#0F1013; --stage-card:#1D1F24; --stage-line:#2E3036; --frame:#3A3D44; --shadow:0 24px 60px rgba(0,0,0,.4);
    color-scheme: dark;
  }
}
:root[data-theme="dark"]{
  --bg:#131417; --bg2:#1A1B1F; --card:#202227; --ink:#F2F0EC; --on-ink:#131417; --muted:#B4B4BC; --faint:#8C8C96; --line:#33353B;
  --accent-text:#F49A73; --tint:#3A2419; --ok:#5CC98A; --ok-bg:#1B3325;
  --stage:#0F1013; --stage-card:#1D1F24; --stage-line:#2E3036; --frame:#3A3D44; --shadow:0 24px 60px rgba(0,0,0,.4);
  color-scheme: dark;
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:'Noto Sans SC','PingFang SC','Microsoft YaHei',system-ui,sans-serif;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit}
button{font-family:inherit;color:inherit}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px;border-radius:6px}
.wrap{max-width:1200px;margin:0 auto;padding:0 32px}
section{scroll-margin-top:72px}
h1,h2,h3{margin:0;font-weight:900;letter-spacing:-.01em}
h2{font-size:40px;line-height:1.25}
.lead{font-size:18px;color:var(--muted);max-width:44em;margin:16px 0 0}
.stage{background:var(--stage);color:var(--stage-ink)}
.stage .lead{color:var(--stage-muted)}
.alt{background:var(--bg2)}
.pad{padding:112px 0}

/* nav */
.nav{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--bg) 92%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-top:14px;padding-bottom:14px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none}
.brand b{font-size:22px;letter-spacing:.1em}
.links{display:flex;align-items:center;gap:28px;font-size:15px}
.links a{text-decoration:none}
.links a:not(.btn):hover{color:var(--accent-text)}
.btn{display:inline-block;text-decoration:none;border:none;cursor:pointer;border-radius:10px;font-weight:700}
.btn-dark{background:var(--ink);color:var(--on-ink);padding:10px 20px}
.btn-main{background:var(--accent);color:#FFFFFF;padding:14px 30px;font-size:19px}
.btn-line{border:1px solid var(--line);padding:14px 28px;font-size:17px;font-weight:500;background:var(--card)}
@media (max-width:760px){.links a:not(.btn){display:none}}

/* chat */
.chat{display:flex;flex-direction:column;justify-content:flex-end;gap:10px;font-size:14px;overflow:hidden}
.msg{max-width:86%;padding:10px 14px;border-radius:14px}
.msg.boss{align-self:flex-end;background:var(--ink);color:var(--on-ink);border-bottom-right-radius:4px}
.msg.bot{align-self:flex-start;background:var(--card);border:1px solid var(--accent);border-bottom-left-radius:4px}
.msg.other{align-self:flex-start;background:var(--card);border-bottom-left-radius:4px}
.msg .meta{display:block;font-size:12px;opacity:.75;margin-bottom:2px}
.chat .time{align-self:center;font-size:12px;color:var(--faint)}
.typing{align-self:flex-start;background:var(--card);border-radius:14px;padding:12px 16px;display:flex;gap:4px}
.typing i{width:6px;height:6px;border-radius:50%;background:var(--faint);animation:dot 1.2s infinite}
.typing i:nth-child(2){animation-delay:.2s}.typing i:nth-child(3){animation-delay:.4s}
@keyframes dot{0%,80%,100%{opacity:.25}40%{opacity:1}}
.in{animation:pop .4s ease-out both}
@keyframes pop{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}

/* hero */
.hero{padding:72px 0 88px;text-align:center}
.hero h1{font-size:clamp(36px,5.4vw,60px);line-height:1.18;letter-spacing:-.02em}
.hero .sub{font-size:19px;color:var(--muted);max-width:36em;margin:24px auto 0}
.hero .ctas{display:flex;flex-wrap:wrap;justify-content:center;gap:16px;margin-top:36px}
.demo{margin-top:64px;display:flex;flex-wrap:wrap;gap:20px;text-align:left}
.col{flex:1 1 330px;min-width:0;display:flex;flex-direction:column;gap:12px}
.col-h{display:flex;align-items:baseline;gap:10px;font-weight:700}
.col-h span{font-size:14px;font-weight:900;color:var(--faint);transition:color .3s}
.col.on .col-h span{color:var(--accent-text)}
.panel{height:470px;border-radius:20px;border:2px solid var(--line);transition:border-color .3s;overflow:hidden;display:flex;flex-direction:column}
.col.on .panel{border-color:var(--accent)}
.chat-panel{background:var(--bg2)}
.chat-head{padding:12px 16px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:10px;background:var(--card)}
.avatar{width:32px;height:32px;border-radius:9px;background:#16181D;display:flex;align-items:center;justify-content:center;flex:none}
.chat-head b{font-size:14px;display:block;line-height:1.3}.chat-head small{font-size:12px;color:var(--faint)}
#heroChat{flex:1;padding:16px}
.fcard{align-self:flex-start;width:86%;background:var(--card);border:1px solid var(--accent);border-radius:14px;padding:12px 14px;display:flex;flex-direction:column;gap:6px}
.tag-ok{font-size:12px;font-weight:700;color:var(--ok);background:var(--ok-bg);padding:1px 8px;border-radius:999px;white-space:nowrap}
.ticket-panel{background:var(--card);padding:20px}
.ticket-top{display:flex;justify-content:space-between;font-size:12px;color:var(--faint);padding-bottom:12px;border-bottom:1px solid var(--line)}
.empty{flex:1;display:flex;align-items:center;justify-content:center;color:var(--faint);font-size:14px}
.field small{display:block;font-size:12px;color:var(--faint);margin-bottom:4px}
.quote-box{font-size:14px;background:var(--bg2);border-radius:8px;padding:8px 12px}
.status{display:flex;align-items:center;gap:12px;font-size:14px;color:var(--faint)}
.status i{width:10px;height:10px;border-radius:50%;background:var(--line);flex:none}
.status.st-on{color:var(--ink)}.status.st-on i{background:var(--ink)}
.status.cur{font-weight:700}.status.cur i{background:var(--accent)}
.status em{font-style:normal;width:44px;font-variant-numeric:tabular-nums;color:var(--faint);font-weight:400}
.phone-slot{height:470px;display:flex;justify-content:center}
.phone{width:250px;height:470px;border:8px solid var(--frame);border-radius:36px;background:var(--card);overflow:hidden;display:flex;flex-direction:column}
.phone .notch{height:22px;display:flex;justify-content:center;flex:none}.phone .notch i{width:70px;height:6px;margin-top:8px;border-radius:3px;background:var(--frame)}
.skel{flex:1;padding:20px;display:flex;flex-direction:column;gap:12px}
.skel i{display:block;height:14px;border-radius:4px;background:var(--bg2)}
.promises{margin-top:28px;display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:12px 28px;font-size:15px;font-weight:700}
.promises span{display:flex;align-items:center;gap:8px}.promises span::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--accent)}
.replay{font-size:14px;background:none;border:1px solid var(--line);border-radius:999px;padding:6px 16px;cursor:pointer}

/* why */
.why-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px;margin-top:48px}
.why{background:var(--card);border-radius:16px;padding:28px}
.why .old{font-size:13px;color:var(--faint);text-decoration:line-through;margin:0 0 12px}
.why h3{font-size:22px;margin-bottom:8px}.why p{margin:0;color:var(--muted)}
.why.us{background:#16181D;color:#F7F5F2;border-top:4px solid var(--accent)}
.why.us .old{text-decoration:none;color:#F49A73;font-weight:700}.why.us p{color:#D9D9DE}

/* partner */
.tabs{display:flex;flex-wrap:wrap;gap:10px;margin:40px 0 32px}
.tab{font-size:16px;font-weight:700;padding:10px 22px;border-radius:999px;cursor:pointer;border:2px solid var(--stage-line);background:transparent;color:var(--stage-ink)}
.tab[aria-selected="true"]{background:var(--stage-ink);color:#16181D;border-color:var(--stage-ink)}
.tabrow{display:flex;flex-wrap:wrap;gap:48px;align-items:center}
.tabtext{flex:1 1 380px;min-width:0}
.tabtext h3{font-size:30px;margin-bottom:12px}.tabtext p{margin:0;color:var(--stage-muted);font-size:17px}
.bar{margin-top:24px;height:4px;background:var(--stage-line);border-radius:2px;overflow:hidden}
.bar i{display:block;height:100%;background:var(--accent);transform-origin:left;animation:fill 7s linear both}
@keyframes fill{from{transform:scaleX(0)}to{transform:scaleX(1)}}
.tabchat{flex:1 1 420px;min-width:0;min-height:340px;background:var(--bg2);color:var(--ink);border-radius:20px;padding:20px}

.story-sec{background:var(--bg2);padding:104px 0}
.story h3{font-size:34px}
.story-lead{color:var(--muted);margin:12px 0 0;font-size:17px}
.beats{list-style:none;margin:48px 0 0;padding:0;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;position:relative}
.beats::before{content:"";position:absolute;left:0;right:0;top:9px;height:2px;background:var(--line)}
.beat{position:relative;padding-top:32px;display:flex;flex-direction:column;gap:12px}
.beat::before{content:"";position:absolute;left:0;top:2px;width:16px;height:16px;border-radius:50%;background:var(--bg2);border:2px solid var(--faint);box-sizing:border-box}
.beat.last::before{border-color:var(--accent);background:var(--accent)}
.beat>small{font-size:13px;font-weight:700;color:var(--muted)}
.beat.last>small{color:var(--accent-text)}
.beat .chat{background:var(--card);color:var(--ink);border-radius:16px;padding:14px;font-size:13px;justify-content:flex-start;min-height:150px;box-shadow:0 1px 0 var(--line)}
.beat .msg{max-width:100%}
.beat .msg.bot,.beat .msg.other{background:var(--bg2)}
.beat .fcard{width:100%;background:var(--card)}
.beat p{margin:0;font-size:14px;color:var(--muted)}
.open-btn{align-self:flex-start;margin-top:2px;background:var(--ink);color:var(--on-ink);border:none;border-radius:8px;padding:6px 14px;font-size:13px;font-weight:700;cursor:pointer}
.js-play .beat{opacity:0;transform:translateY(12px)}
.js-play.go .beat{animation:pop .5s ease-out both}
.js-play.go .beat:nth-child(2){animation-delay:.6s}.js-play.go .beat:nth-child(3){animation-delay:1.2s}.js-play.go .beat:nth-child(4){animation-delay:1.8s}
@media (max-width:900px){.beats{grid-template-columns:repeat(2,minmax(0,1fr));row-gap:32px}.beats::before{display:none}}
@media (max-width:560px){.beats{grid-template-columns:1fr}}

.works{display:flex;flex-wrap:wrap;gap:40px;align-items:flex-start;margin-top:40px}
.wlist{flex:1 1 420px;min-width:0;display:flex;flex-direction:column;gap:12px}
.witem{text-align:left;cursor:pointer;background:var(--stage-card);color:var(--stage-ink);border:2px solid transparent;border-radius:16px;padding:16px 20px;display:flex;align-items:center;gap:16px;transition:border-color .2s,transform .2s}
.witem:hover{transform:translateX(4px)}
.witem[aria-pressed="true"]{border-color:var(--accent)}
.witem .d{flex:none;width:10px;height:10px;border-radius:50%;background:var(--stage-line)}
.witem[aria-pressed="true"] .d{background:var(--accent)}
.witem .t{flex:1;min-width:0}
.witem .n{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.witem .n b{font-size:18px}
.witem .q{font-size:14px;color:var(--stage-muted)}
.witem .by{font-size:12px;color:var(--stage-muted)}
.wphone{flex:0 1 330px;min-width:0;margin:0 auto;display:flex;flex-direction:column;align-items:center;gap:16px}
.bigphone{width:290px;height:580px;border:9px solid #3A3D44;border-radius:40px;background:var(--card);color:var(--ink);overflow:hidden;display:flex;flex-direction:column;box-shadow:0 30px 70px rgba(0,0,0,.35)}
.bigphone .notch i{background:#3A3D44}
.ph-head{padding:4px 16px 10px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;flex:none}
.ph-head b{font-size:16px}.ph-head small{font-size:11px;color:var(--faint)}
.ph-body{flex:1;overflow:hidden;padding:14px 16px;display:flex;flex-direction:column;gap:10px;font-size:13px}
.kpi{background:var(--tint);border-radius:14px;padding:12px 14px}
.kpi small{display:block;font-size:12px;color:var(--muted)}
.kpi strong{display:block;font-size:30px;font-weight:900;line-height:1.25}
.hot{font-size:12px;font-weight:700;color:var(--accent-text)}
.seg{display:flex;background:var(--bg2);border-radius:10px;padding:3px}
.seg button{flex:1;border:none;border-radius:8px;padding:6px;cursor:pointer;background:transparent;font-weight:700;font-size:13px}
.seg button[aria-pressed="true"]{background:var(--card);box-shadow:0 1px 3px rgba(0,0,0,.1)}
.row{text-align:left;border:1px solid var(--line);background:var(--card);border-radius:10px;padding:9px 12px;display:flex;flex-direction:column;gap:2px;width:100%;cursor:pointer;font-size:13px}
.row[aria-expanded="true"]{border-color:var(--accent);background:var(--tint)}
.row .rl{display:flex;justify-content:space-between;width:100%}
.row small{font-size:12px;color:var(--muted)}
.plain{border:1px solid var(--line);border-radius:10px;padding:10px 12px;display:flex;justify-content:space-between}
.act{margin-top:auto;background:var(--ink);color:var(--on-ink);border:none;border-radius:10px;padding:11px;font-size:14px;font-weight:700;cursor:pointer;width:100%}
.done{background:var(--ok-bg);color:var(--ok);border-radius:10px;padding:9px 12px;font-weight:700}
.note{color:var(--faint);font-size:12px}
.chart{height:90px;display:flex;align-items:flex-end;gap:6px}
.chart i{flex:1;background:var(--line);border-radius:3px}
.chart i:last-child{background:var(--accent)}
.facts{width:290px;display:flex;gap:10px}
.facts div{flex:1;background:var(--stage-card);border-radius:12px;padding:10px 12px}
.facts small{display:block;font-size:12px;color:var(--stage-muted)}
.facts b{font-size:18px}

/* growth */
.gctl{display:flex;flex-wrap:wrap;align-items:center;gap:16px;margin:32px 0 8px}
.play{font-size:15px;font-weight:700;background:var(--accent);color:#FFFFFF;border:none;border-radius:999px;padding:10px 22px;cursor:pointer}
.weeks{display:flex;flex-wrap:wrap;border-bottom:2px solid var(--line);margin-bottom:32px}
.week{flex:1 1 110px;padding:14px 8px;background:none;border:none;border-bottom:3px solid transparent;margin-bottom:-2px;cursor:pointer;font-size:16px;color:var(--faint)}
.week[aria-selected="true"]{border-color:var(--accent);color:var(--ink);font-weight:900}
.grow{display:flex;flex-wrap:wrap;gap:32px;align-items:stretch}
.tiles{flex:2 1 520px;min-width:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
@media (max-width:640px){.tiles{grid-template-columns:1fr}}
.tile{min-height:140px;border-radius:16px;padding:20px;border:2px dashed var(--line);color:var(--faint);display:flex;flex-direction:column;gap:6px}
.tile small{font-size:12px;font-weight:700}.tile b{font-size:19px}
.tile.on{border-style:solid;background:var(--card);color:var(--ink)}
.tile.on small{color:var(--accent-text)}
.tile.new{background:var(--tint);border-color:var(--accent);animation:growIn .5s ease-out both}
@keyframes growIn{0%{transform:scale(.92);opacity:0}60%{transform:scale(1.03);opacity:1}100%{transform:none}}
.gpanel{flex:1 1 260px;min-width:0;background:#16181D;color:#F7F5F2;border-radius:20px;padding:28px;display:flex;flex-direction:column;gap:18px}
.gpanel small{font-size:13px;color:#B9B9C0}
.gpanel .y{font-size:48px;font-weight:900;line-height:1.2;font-variant-numeric:tabular-nums}
.ytrack{height:8px;background:#34363C;border-radius:4px;overflow:hidden;margin-top:8px}.ytrack i{display:block;height:100%;background:var(--accent);border-radius:4px;transition:width .6s ease}
.gpanel .gn{font-size:15px;color:#D9D9DE}
.gres{display:flex;flex-direction:column;gap:12px;border-top:1px solid #34363C;padding-top:16px}
.gres b{font-size:22px}.gres .o{color:#F49A73}
.saying{margin:48px 0 0;font-size:22px;font-weight:700;max-width:820px}
.saying span{font-size:15px;font-weight:400;color:var(--muted);margin-left:12px}

/* pricing */
.prices{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px;margin-top:48px}
.price{background:var(--card);border-radius:16px;padding:28px;display:flex;flex-direction:column;gap:8px}
.price small{font-size:13px;color:var(--faint)}.price h3{font-size:22px}
.price .v{font-size:28px;font-weight:900}.price p{margin:0;color:var(--muted)}
.price.feat{background:#16181D;color:#F7F5F2;border-top:4px solid var(--accent)}
.price.feat small{color:#F49A73;font-weight:700}.price.feat p{color:#D9D9DE}
.ledger-wrap{margin-top:32px;display:flex;flex-wrap:wrap;gap:32px;align-items:center;background:var(--card);border-radius:20px;padding:32px}
.ledger-wrap>div{flex:1 1 360px;min-width:0}
.ledger-wrap h3{font-size:22px;margin-bottom:12px}.ledger-wrap p{margin:0;color:var(--muted)}
.ledger{background:var(--bg2);border-radius:16px;padding:8px 20px 4px;font-size:14px}
.ledger div{display:flex;justify-content:space-between;align-items:center;padding:12px 0;border-bottom:1px solid var(--line)}
.ledger div:last-child{border-bottom:none}
.ledger .h{font-size:12px;color:var(--faint);padding:10px 0}
.pulse{width:8px;height:8px;border-radius:50%;background:var(--accent);display:inline-block;margin-right:8px;animation:pulse 1.6s ease-in-out infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(238,90,36,.45)}50%{box-shadow:0 0 0 8px rgba(238,90,36,0)}}

/* security */
.sec{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:32px;margin-top:48px}
.sec div{border-top:2px solid var(--ink);padding-top:20px}
.sec h3{font-size:20px;margin-bottom:8px}.sec p{margin:0;color:var(--muted)}

/* about + contact */
.closing{display:flex;flex-wrap:wrap;gap:56px;align-items:flex-start}
.closing>.l{flex:1 1 560px;min-width:0}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:28px;margin:48px 0}
.stats b{display:block;font-size:44px;font-weight:900;line-height:1}
.stats span{display:block;margin-top:8px;color:var(--stage-muted);font-size:15px}
.start{border-top:1px solid var(--stage-line);padding-top:32px}
.start h3{font-size:24px;margin-bottom:20px}
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:12px}
.steps div{border:1px solid var(--stage-line);border-radius:14px;padding:16px}
.steps small{display:block;font-size:13px;color:var(--stage-accent-text);font-weight:700}
.contact{flex:0 1 340px;min-width:0;background:#FFFFFF;color:#16181D;border-radius:24px;padding:28px;display:flex;flex-direction:column;align-items:center;gap:14px;text-align:center}
.contact .qr{width:200px;height:200px}
.contact b{font-size:18px}
.contact p{margin:0;font-size:15px;line-height:1.9;color:#55555F}
.contact .qn{font-size:12px;color:#8A8A94}

footer{background:var(--stage);color:var(--stage-muted);border-top:1px solid var(--stage-line)}
footer .wrap{display:flex;flex-wrap:wrap;gap:16px;justify-content:space-between;align-items:center;padding-top:32px;padding-bottom:32px;font-size:14px}
footer .brand b{font-size:16px;color:var(--stage-ink)}


@media (max-width:640px){.panel,.phone-slot{height:400px}.phone{height:400px;width:220px}.demo{margin-top:40px}.wrap{padding:0 20px}h2{font-size:30px}.pad{padding:80px 0}.tabtext h3{font-size:24px}.story h3{font-size:24px}.ledger-wrap{padding:20px}}
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
}