@import url('https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=Noto+Sans+SC:wght@400;500;600;700;800&display=swap');
.hidden{display:none!important}
.agreement-backdrop{position:fixed;inset:0;background:rgba(16,43,53,.58);backdrop-filter:blur(6px);z-index:25;display:grid;place-items:center;opacity:0;visibility:hidden;transition:.25s}.agreement-backdrop.is-open{opacity:1;visibility:visible}.agreement-modal{width:min(720px,calc(100% - 32px));max-height:min(760px,calc(100vh - 40px));padding:30px;background:var(--paper);box-shadow:var(--shadow);position:relative;display:flex;flex-direction:column}.agreement-modal h2{margin:0 0 16px;font-size:28px;letter-spacing:-.04em}.agreement-scroll{min-height:150px;max-height:420px;overflow:auto;padding:18px;border:1px solid var(--line);background:#fff;color:var(--ink-soft);font-size:12px;line-height:1.85;white-space:pre-wrap}.agreement-check{display:flex;align-items:flex-start;gap:9px;margin:18px 0 9px;color:var(--ink);font-size:12px;line-height:1.6}.agreement-check input{margin-top:3px;accent-color:var(--teal)}.agreement-version{margin:0 0 14px;color:#82949a;font:10px var(--mono)}.agreement-submit{align-self:flex-end}.agreement-submit:disabled{cursor:not-allowed;opacity:.45;transform:none}.agreement-modal .modal-close{background:none}
.tutorial-section{padding-top:82px;padding-bottom:82px;background:#f0f4f0}.tutorial-inner{display:grid;grid-template-columns:.8fr 1.2fr;gap:8vw;align-items:center}.tutorial-player{min-height:300px;border:1px solid var(--line);background:var(--ink);box-shadow:var(--shadow)}.tutorial-video{display:block;width:100%;max-height:470px;background:#102b35}.tutorial-placeholder{min-height:300px;display:grid;place-items:center;align-content:center;gap:12px;color:var(--mint)}.tutorial-placeholder span{font:30px var(--mono);letter-spacing:.14em}.tutorial-placeholder small{color:#a5b5b6;font-size:12px}.tutorial-empty .tutorial-player{background:linear-gradient(135deg,var(--ink),#27545d)}@media(max-width:900px){.tutorial-inner{grid-template-columns:1fr;gap:35px}}
:root{--ink:#102b35;--ink-soft:#35525a;--mist:#f4f6f2;--paper:#fbfcf8;--mint:#baf4d8;--teal:#0c8d78;--amber:#f3b66c;--coral:#e77963;--line:rgba(16,43,53,.14);--shadow:0 24px 80px rgba(16,43,53,.14);--display:'Noto Sans SC',sans-serif;--mono:'DM Mono',monospace}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--display);-webkit-font-smoothing:antialiased}body.modal-open{overflow:hidden}a{text-decoration:none;color:inherit}button{font:inherit;color:inherit;border:0;background:none;cursor:pointer}.page-shell{overflow:hidden}.site-header{height:86px;padding:0 clamp(24px,5vw,76px);display:flex;align-items:center;justify-content:space-between;gap:28px;background:var(--paper);position:relative;z-index:10}.brand{display:flex;align-items:center;gap:11px}.brand-mark{width:34px;height:34px;border:1.5px solid var(--ink);border-radius:10px;display:flex;align-items:flex-end;justify-content:center;gap:3px;padding:7px}.brand-mark i{width:4px;border-radius:3px;background:var(--teal);display:block}.brand-mark i:nth-child(1){height:9px}.brand-mark i:nth-child(2){height:14px;background:var(--ink)}.brand-mark i:nth-child(3){height:20px;background:var(--amber)}.brand-copy{display:grid;gap:1px}.brand-copy strong{font-size:16px;letter-spacing:.12em}.brand-copy small{font:9px var(--mono);letter-spacing:.13em;color:var(--ink-soft)}.main-nav{display:flex;gap:clamp(18px,3vw,42px);font-size:13px;color:var(--ink-soft)}.main-nav a{position:relative}.main-nav a:after{content:'';position:absolute;left:0;bottom:-7px;width:100%;height:1px;background:var(--teal);transform:scaleX(0);transform-origin:right;transition:transform .3s}.main-nav a:hover:after{transform:scaleX(1);transform-origin:left}.header-cta{padding:12px 17px;border:1px solid var(--ink);border-radius:999px;font-size:12px;transition:.25s}.header-cta:hover{background:var(--ink);color:var(--paper)}.header-cta span,.button span{margin-left:9px}.menu-toggle{display:none}.hero{min-height:690px;padding:clamp(70px,9vw,132px) clamp(24px,9vw,140px) 85px;display:grid;grid-template-columns:minmax(330px, .9fr) 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30px}.hero-actions{display:flex;gap:12px;align-items:center}.button{padding:14px 20px;border-radius:4px;font-size:13px;display:inline-flex;align-items:center;justify-content:center}.button-primary{background:var(--ink);color:var(--paper);box-shadow:0 10px 20px rgba(16,43,53,.15);transition:.25s}.button-primary:hover{transform:translateY(-2px);background:var(--teal)}.button-ghost{border:1px solid var(--line);background:rgba(255,255,255,.4);transition:.25s}.button-ghost:hover{border-color:var(--ink);background:var(--paper)}.hero-note{font-size:11px;color:var(--ink-soft);margin-top:20px}.mini-check{color:var(--teal);font-size:14px;margin-right:6px}.hero-visual{min-height:470px;display:flex;align-items:center;justify-content:center}.visual-orbit{position:absolute;border:1px solid rgba(12,141,120,.17);border-radius:50%;transform:rotate(-19deg)}.orbit-one{width:560px;height:325px}.orbit-two{width:430px;height:270px;transform:rotate(29deg)}.response-card{background:rgba(251,252,248,.88);backdrop-filter:blur(9px);border:1px solid rgba(16,43,53,.12);box-shadow:var(--shadow);position:absolute}.response-main{width:min(440px,80%);padding:22px 23px;border-radius:11px;transform:rotate(-3deg);z-index:2}.card-topline{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding-bottom:14px;margin-bottom:18px}.status-pill{font:10px var(--mono);color:var(--teal);letter-spacing:.03em}.status-pill i{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--teal);margin-right:7px}.card-time,.muted{color:#82949a;font-size:11px}.chat-row{display:flex;align-items:flex-start;gap:11px;margin:15px 0}.chat-row p{margin:3px 0;font-size:12px;line-height:1.7}.chat-row b{color:var(--teal)}.avatar{width:26px;height:26px;border-radius:8px;display:grid;place-items:center;font-size:11px;flex:none}.avatar-user{background:#e8e2d5}.avatar-ai{background:var(--mint);color:var(--teal)}.typing{border-top:1px solid var(--line);padding-top:15px;display:flex;align-items:center;gap:4px}.typing span{width:4px;height:4px;border-radius:50%;background:var(--teal);animation:bounce 1.2s infinite}.typing span:nth-child(2){animation-delay:.15s}.typing span:nth-child(3){animation-delay:.3s}.typing label{font-size:10px;color:#82949a;margin-left:6px}.response-stat{top:12%;right:2%;padding:16px 18px;border-radius:9px;display:grid;gap:6px;transform:rotate(4deg)}.response-stat small,.response-source small{font-size:10px;color:#82949a}.response-stat strong{font:30px var(--mono);letter-spacing:-.06em}.response-stat span{color:var(--teal);font:11px var(--mono)}.response-stat i{color:#82949a;font-style:normal;font-family:var(--display);font-size:10px}.response-source{bottom:12%;left:4%;display:flex;align-items:center;gap:10px;padding:13px 15px;border-radius:9px;transform:rotate(-5deg)}.source-icon{font-size:20px;color:var(--amber)}.response-source div{display:grid;gap:3px}.response-source b{font-size:11px}.source-arrow{color:var(--teal)}.visual-stamp{position:absolute;bottom:7%;right:12%;font:10px var(--mono);letter-spacing:.12em;line-height:1.5;color:var(--teal);transform:rotate(-9deg)}.visual-stamp strong{font-size:15px;color:var(--ink)}.hero-scroll{position:absolute;bottom:27px;left:clamp(24px,9vw,140px);font:9px var(--mono);letter-spacing:.14em;color:#82949a;display:flex;align-items:center;gap:12px}.hero-scroll i{display:block;width:56px;height:1px;background:#a3b4b5}.trust-strip{padding:24px clamp(24px,9vw,140px);display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);font-size:11px;color:#82949a}.trust-logos{display:flex;gap:clamp(18px,4vw,55px);color:var(--ink-soft);font-size:12px;letter-spacing:.12em}.section{padding:clamp(85px,11vw,155px) clamp(24px,9vw,140px)}.section-heading{max-width:680px}.section-kicker{margin-bottom:17px}.section h2{font-size:clamp(35px,4.5vw,61px);line-height:1.2;letter-spacing:-.055em;margin:0 0 20px}.section-heading>p:last-child,.flow-head p:last-child{max-width:450px;color:var(--ink-soft);line-height:1.8;font-size:14px}.capability-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:13px;margin-top:64px}.capability-card{min-height:285px;padding:22px 21px 19px;border:1px solid var(--line);display:flex;flex-direction:column;position:relative;overflow:hidden;transition:.35s}.capability-card:before{content:'';width:95px;height:95px;border-radius:50%;position:absolute;right:-30px;bottom:-35px;background:var(--card-tone);opacity:.32;transition:.35s}.capability-card:hover{transform:translateY(-7px);border-color:var(--ink);box-shadow:0 16px 35px rgba(16,43,53,.08)}.capability-card:hover:before{transform:scale(1.45)}.tone-mint{--card-tone:var(--mint)}.tone-blue{--card-tone:#c5dceb}.tone-amber{--card-tone:var(--amber)}.tone-coral{--card-tone:#f3c4b8}.capability-top{display:flex;justify-content:space-between;font:11px var(--mono);color:#82949a}.capability-top i{font:10px var(--display);font-style:normal;color:var(--teal);padding:4px 7px;border:1px solid rgba(12,141,120,.3);border-radius:99px}.capability-card h3{font-size:23px;letter-spacing:-.03em;margin:auto 0 12px}.capability-card 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i{font-size:19px;color:var(--teal);font-style:normal}.contact-card>small{display:block;font-size:11px;color:#82949a;padding-top:16px}.site-footer{padding:27px clamp(24px,5vw,76px);border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;color:#82949a;font-size:10px}.site-footer .brand-copy strong{color:var(--ink)}.modal-backdrop{position:fixed;inset:0;background:rgba(16,43,53,.5);backdrop-filter:blur(6px);z-index:20;display:grid;place-items:center;opacity:0;visibility:hidden;transition:.25s}.modal-backdrop.is-open{opacity:1;visibility:visible}.wechat-modal{width:min(390px,calc(100% - 40px));padding:34px;background:var(--paper);position:relative;box-shadow:var(--shadow);text-align:center}.wechat-modal h2{font-size:27px;margin:0 0 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span{display:block;width:23px;height:1px;background:var(--ink);transition:.2s}.main-nav{position:absolute;top:72px;left:0;right:0;padding:18px 24px 22px;display:grid;gap:18px;background:var(--paper);border-bottom:1px solid var(--line);transform:translateY(-12px);opacity:0;pointer-events:none;transition:.25s}.main-nav.is-open{transform:none;opacity:1;pointer-events:auto}.hero{padding-top:58px;min-height:720px}.hero h1{font-size:44px}.hero-description{font-size:14px}.hero-visual{min-height:360px;transform:scale(.86);transform-origin:center top;margin:15px -30px 0}.orbit-one{width:460px}.orbit-two{width:350px}.response-main{width:400px}.response-stat{right:-2%}.response-source{left:-2%}.trust-strip{display:grid;gap:18px}.trust-logos{gap:15px;flex-wrap:wrap}.section{padding-top:76px;padding-bottom:76px}.section 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.agreement-backdrop.agreement-readonly .agreement-check,.agreement-backdrop.agreement-readonly .agreement-submit{display:none}.agreement-backdrop.agreement-readonly .agreement-version{margin-top:16px}