:root{
  --ink:#1a1d2e;
  --ink-soft:#5b6076;
  --bg:#f6f7fb;
  --card:#ffffff;
  --line:#e6e8f0;
  --brand:#6d5efc;
  --brand-2:#21d4c0;
  --danger:#e5484d;
  --radius:14px;
  --shadow:0 12px 30px rgba(26,29,46,.08);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.55;
  min-width:1280px;
}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{line-height:1.2;letter-spacing:-.01em}
.container{max-width:1120px;margin:0 auto;padding:0 28px}
.container.narrow{max-width:680px}
.muted{color:var(--ink-soft)}
.center{text-align:center}
.mt{margin-top:24px}

/* header */
.site-header{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav-wrap{display:flex;align-items:center;gap:28px;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--ink)}
.brand:hover{text-decoration:none}
.brand-mark{display:inline-flex}
.brand-name{font-size:18px;letter-spacing:-.02em}
.main-nav{display:flex;gap:22px;margin-left:6px;flex:1}
.main-nav a{color:var(--ink-soft);font-weight:500;font-size:15px}
.main-nav a:hover{color:var(--ink);text-decoration:none}
.main-nav a.active{color:var(--brand)}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:600;font-size:15px;padding:11px 20px;border-radius:10px;border:1px solid transparent;cursor:pointer;transition:transform .08s ease,box-shadow .2s ease;font-family:inherit}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-sm{padding:8px 15px;font-size:14px}
.btn-block{width:100%}
.btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;box-shadow:0 8px 18px rgba(109,94,252,.28)}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:#cfd3e3}
.btn-danger{background:var(--danger);color:#fff}

.eyebrow{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--brand);margin-bottom:14px}

/* hero */
.hero{padding:72px 0 56px;background:radial-gradient(1200px 400px at 70% -10%,rgba(109,94,252,.12),transparent 60%)}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}
.hero-copy h1{font-size:46px;margin-bottom:18px}
.lead{font-size:18px;color:var(--ink-soft);max-width:560px}
.hero-cta{display:flex;gap:14px;margin:28px 0 30px}
.hero-trust{list-style:none;display:flex;gap:32px}
.hero-trust li{font-size:14px;color:var(--ink-soft)}
.hero-trust strong{display:block;font-size:22px;color:var(--ink)}

.hero-art{display:flex;justify-content:center}
.chat-preview{width:340px;background:var(--card);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);overflow:hidden}
.cp-head{display:flex;align-items:center;gap:10px;padding:14px 16px;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff}
.cp-avatar{width:34px;height:34px;border-radius:50%;background:rgba(255,255,255,.25);display:grid;place-items:center;font-weight:700}
.cp-head small{display:block;opacity:.85;font-size:12px}
.cp-body{padding:16px;display:flex;flex-direction:column;gap:10px;background:#fbfbfe}
.bubble{max-width:78%;padding:10px 13px;border-radius:14px;font-size:14px}
.bubble.bot{align-self:flex-start;background:#eef0f8;color:var(--ink);border-bottom-left-radius:4px}
.bubble.user{align-self:flex-end;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;border-bottom-right-radius:4px}
.typing-static span,.typing span{display:inline-block;width:7px;height:7px;margin:0 2px;border-radius:50%;background:#9aa0bd;animation:blink 1.2s infinite}
.typing-static span:nth-child(2),.typing span:nth-child(2){animation-delay:.2s}
.typing-static span:nth-child(3),.typing span:nth-child(3){animation-delay:.4s}
@keyframes blink{0%,60%,100%{opacity:.3}30%{opacity:1}}

/* sections */
.section{padding:64px 0}
.section-alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-title{font-size:32px;text-align:center}
.section-sub{text-align:center;color:var(--ink-soft);margin:10px auto 36px;max-width:600px;font-size:17px}

.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}

.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.feature-card h3,.bot-card h3,.feature-long h3{margin:14px 0 8px;font-size:19px}
.feature-card p,.bot-card p,.feature-long p{color:var(--ink-soft);font-size:15px}
.ficon{display:inline-grid;place-items:center;width:46px;height:46px;border-radius:12px;background:linear-gradient(135deg,rgba(109,94,252,.12),rgba(33,212,192,.12))}

.bot-card{display:flex;flex-direction:column;gap:6px}
.bot-avatar{width:52px;height:52px;border-radius:14px;display:grid;place-items:center;color:#fff;font-weight:700;font-size:22px;margin-bottom:8px}
.bot-card .btn{margin-top:14px}
.link-arrow{font-weight:600;font-size:14px;margin-top:6px}

.feature-long .ticks{margin-top:14px}
.ticks{list-style:none;display:flex;flex-direction:column;gap:8px}
.ticks li{position:relative;padding-left:26px;font-size:15px;color:var(--ink-soft)}
.ticks li::before{content:"";position:absolute;left:0;top:6px;width:16px;height:16px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--brand-2))}
.ticks li::after{content:"";position:absolute;left:5px;top:9px;width:4px;height:7px;border:solid #fff;border-width:0 2px 2px 0;transform:rotate(45deg)}

.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.step{text-align:center}
.step-num{display:inline-grid;place-items:center;width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;font-weight:700;margin-bottom:12px}
.step h4{margin-bottom:6px}
.step p{color:var(--ink-soft);font-size:15px}

.cta-band{background:linear-gradient(135deg,var(--brand),var(--brand-2))}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;color:#fff}
.cta-inner h2{font-size:28px}
.cta-inner p{opacity:.9}
.cta-band .btn-primary{background:#fff;color:var(--brand);box-shadow:none}

/* page head */
.page-head{padding:56px 0 8px;background:radial-gradient(900px 300px at 60% -20%,rgba(33,212,192,.12),transparent 60%)}
.page-head h1{font-size:38px}
.page-head .lead{margin-top:12px}

/* footer */
.site-footer{background:#fff;border-top:1px solid var(--line);padding:48px 0 24px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:32px}
.footer-grid h4{margin-bottom:12px;font-size:15px}
.footer-grid a{display:block;color:var(--ink-soft);font-size:14px;margin-bottom:7px}
.footer-grid a:hover{color:var(--ink)}
.footer-bottom{margin-top:28px;padding-top:18px;border-top:1px solid var(--line);font-size:13px}

/* pricing */
.billing-toggle{display:inline-flex;gap:4px;margin-top:24px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:5px}
.bt-opt{border:none;background:transparent;font-family:inherit;font-weight:600;font-size:14px;padding:9px 18px;border-radius:8px;cursor:pointer;color:var(--ink-soft)}
.bt-opt.active{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff}
.save-tag{font-size:11px;background:rgba(255,255,255,.25);padding:2px 6px;border-radius:6px;margin-left:6px}
.pricing-grid{align-items:start}
.price-card{display:flex;flex-direction:column;position:relative}
.price-card.popular{border-color:var(--brand);box-shadow:0 18px 40px rgba(109,94,252,.18)}
.popular-tag{position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;font-size:12px;font-weight:700;padding:4px 12px;border-radius:20px}
.price{margin:12px 0 2px;display:flex;align-items:baseline;gap:2px}
.price .cur{font-size:22px;font-weight:700}
.price .amount{font-size:44px;font-weight:800}
.price .per{font-size:16px;color:var(--ink-soft)}
.price-note{margin-bottom:16px}
.price-card .ticks{flex:1;margin-bottom:20px}

/* signup form */
.signup-form{max-width:520px;margin:0 auto}
.field-row{display:flex;gap:10px}
.field-row input{flex:1}
input,textarea,select{font-family:inherit;font-size:15px;padding:12px 14px;border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--ink);width:100%}
input:focus,textarea:focus,select:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(109,94,252,.15)}
.form-msg{min-height:20px;margin-top:10px;font-size:14px;font-weight:600}
.form-msg.ok{color:#0a9d6b}
.form-msg.err{color:var(--danger)}

/* builder */
.builder-botpick{margin-top:22px;display:flex;align-items:center;gap:10px}
.builder-botpick label{font-weight:600}
.builder-botpick select{width:auto;min-width:200px}
.builder-layout{display:grid;grid-template-columns:380px 1fr;gap:28px;align-items:start}
.builder-form-card .lbl{display:block;font-weight:600;font-size:14px;margin:14px 0 6px}
.builder-form-card .lbl:first-of-type{margin-top:18px}
.hint{display:block;color:var(--ink-soft);font-size:12.5px;margin-top:5px}
.builder-form-card button{margin-top:18px}
.builder-list-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.count-badge{display:inline-grid;place-items:center;min-width:24px;height:24px;padding:0 7px;border-radius:12px;background:#eef0f8;color:var(--brand);font-size:13px;font-weight:700;vertical-align:middle;margin-left:6px}
.intent-list{display:flex;flex-direction:column;gap:12px}
.intent-row{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 18px;display:flex;justify-content:space-between;gap:16px;align-items:flex-start}
.intent-row .keys{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:8px}
.keychip{background:#eef0f8;color:var(--brand);font-size:12.5px;font-weight:600;padding:3px 9px;border-radius:7px}
.intent-row .reply{color:var(--ink-soft);font-size:14.5px}
.intent-del{border:none;background:transparent;color:var(--ink-soft);cursor:pointer;font-size:18px;line-height:1;padding:4px 8px;border-radius:8px}
.intent-del:hover{background:#fdeaea;color:var(--danger)}
.empty-state{text-align:center;color:var(--ink-soft);padding:40px 20px;border:1px dashed var(--line);border-radius:12px}

/* modal */
.modal-overlay{position:fixed;inset:0;background:rgba(26,29,46,.5);display:grid;place-items:center;z-index:60}
.modal-overlay[hidden]{display:none}
.modal{background:#fff;border-radius:16px;padding:26px;width:400px;box-shadow:0 30px 60px rgba(0,0,0,.25)}
.modal h3{margin-bottom:8px}
.modal p{color:var(--ink-soft);margin-bottom:20px}
.modal-actions{display:flex;justify-content:flex-end;gap:10px}

/* chat page */
.chat-page{background:linear-gradient(160deg,#eef0fb,#f6f7fb)}
.chat-main{min-height:calc(100vh - 64px);display:grid;place-items:center;padding:32px 0}
.chat-shell{width:560px}
.chat-foot{text-align:center;margin-top:14px;font-size:13px}
.chat-window{background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);overflow:hidden;display:flex;flex-direction:column;height:620px}
.chat-head{display:flex;align-items:center;gap:12px;padding:16px 18px;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff}
.chat-avatar{width:40px;height:40px;border-radius:50%;background:rgba(255,255,255,.25);display:grid;place-items:center;font-weight:700;font-size:17px}
.chat-head-meta{flex:1}
.chat-head-meta small{display:block;font-size:12px;opacity:.9}
.online-dot::before{content:"";display:inline-block;width:7px;height:7px;border-radius:50%;background:#7dffd0;margin-right:5px}
.chat-close{color:#fff;font-size:26px;line-height:1;opacity:.85}
.chat-close:hover{opacity:1;text-decoration:none}
.chat-scroll{flex:1;overflow-y:auto;padding:20px;display:flex;flex-direction:column;gap:12px;background:#fbfbfe}
.chat-scroll .bubble{max-width:74%}
.msg-row{display:flex;flex-direction:column}
.chat-chips{display:flex;flex-wrap:wrap;gap:8px;padding:10px 18px 0}
.chip{border:1px solid var(--line);background:#fff;color:var(--brand);font-family:inherit;font-size:13.5px;font-weight:600;padding:7px 13px;border-radius:18px;cursor:pointer}
.chip:hover{background:#f1f0ff;border-color:#cfc8ff}
.chat-input{display:flex;gap:10px;padding:16px 18px;border-top:1px solid var(--line);background:#fff}
.chat-input input{flex:1}
.send-btn{flex:0 0 auto;width:46px;height:46px;border:none;border-radius:12px;background:linear-gradient(135deg,var(--brand),var(--brand-2));cursor:pointer;display:grid;place-items:center}
.send-btn:hover{filter:brightness(1.05)}