:root{--ink:#0b1020;--muted:#697181;--green:#8fc8ff;--green-dark:#428ee8;--surface:#ffffff;--soft:#f5f8f7;--line:#e8ecea}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:var(--soft);font-family:Arial,PingFang SC,Microsoft YaHei,sans-serif}a{color:inherit;text-decoration:none}button,input{font:inherit}.site-header{position:-webkit-sticky;position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;min-height:72px;padding:0 5vw;background:rgba(255,255,255,.92);border-bottom:1px solid var(--line);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)}.brand{display:inline-flex;align-items:center;gap:10px;font-weight:800;font-size:22px;letter-spacing:-1px}.brand-mark{display:grid;place-items:center;width:34px;height:34px;border-radius:11px;color:var(--ink);background:var(--green);font-size:15px;font-weight:900}.brand-name span{color:var(--green-dark)}.nav{display:flex;align-items:center;gap:26px;color:#4d5665;font-size:14px;font-weight:600}.nav a:hover{color:var(--green-dark)}.header-actions{display:flex;align-items:center;gap:12px}.user-chip{color:var(--muted);font-size:13px}.button{display:inline-flex;align-items:center;justify-content:center;border:0;border-radius:14px;padding:13px 22px;cursor:pointer;font-weight:700;transition:transform .2s,box-shadow .2s,background .2s}.button:hover{transform:translateY(-2px)}.button-primary{color:#12345d;background:var(--green);box-shadow:0 12px 24px rgba(66,142,232,.22)}.button-dark{color:white;background:var(--ink)}.button-light{color:var(--ink);background:white;border:1px solid var(--line)}.button-ghost{padding:8px 10px;color:var(--muted);background:transparent}.page-shell{min-height:calc(100vh - 72px)}.container{width:min(1180px,calc(100% - 40px));margin:0 auto}.hero{display:grid;grid-template-columns:1.05fr .95fr;grid-gap:60px;gap:60px;align-items:center;padding:92px 0 82px}.home-hero{display:grid;grid-template-columns:.85fr 1.15fr;grid-gap:42px;gap:42px;align-items:stretch;padding:58px 0 32px}.home-hero-copy{display:flex;flex-direction:column;justify-content:center;padding:44px 0}.home-hero>div:first-child{position:relative;padding:52px 42px;border-radius:32px;background:linear-gradient(155deg,#ffffff,#eef6ff);box-shadow:0 22px 55px rgba(49,103,163,.09);overflow:hidden}.home-hero>div:first-child:after{content:"";position:absolute;right:-90px;bottom:-100px;width:250px;height:250px;border:1px solid rgba(76,151,235,.22);border-radius:50%;box-shadow:0 0 0 30px rgba(76,151,235,.04),0 0 0 60px rgba(76,151,235,.025)}.home-hero .eyebrow{color:#4c9bed;letter-spacing:.22em}.home-hero h1{position:relative;z-index:1;max-width:560px;margin:22px 0 20px;font-size:clamp(44px,5.5vw,72px);line-height:1.08;letter-spacing:-3px}.home-hero h1 span{color:#398ce8}.home-hero p{position:relative;z-index:1;max-width:470px;color:#657b96;font-size:18px;line-height:1.85}.home-hero-art{position:relative;min-height:520px;display:grid;place-items:center;border:1px solid #cfe5ff;border-radius:42px;background:linear-gradient(135deg,#f8fcff,#d8edff 48%,#eff8ff);overflow:hidden;box-shadow:inset 0 0 80px rgba(255,255,255,.7),0 22px 55px rgba(49,103,163,.12)}.home-hero-art:before{content:"";position:absolute;width:72%;aspect-ratio:1;border:1px solid rgba(83,164,245,.25);border-radius:50%;box-shadow:0 0 0 32px rgba(83,164,245,.045),0 0 0 64px rgba(83,164,245,.03)}.home-hero-art:after{content:"PERSONAL AI";position:absolute;top:22px;right:28px;color:rgba(46,121,205,.34);font-size:10px;font-weight:800;letter-spacing:.18em}.home-image-wrap{width:100%;height:100%;display:grid;place-items:center}.home-image-wrap img{position:relative;z-index:1;width:100%;height:100%;object-fit:contain;padding:18px;filter:saturate(.94) contrast(.98)}.eyebrow{color:var(--green-dark);font-size:13px;font-weight:800;letter-spacing:.16em;text-transform:uppercase}.hero h1{max-width:690px;margin:16px 0 22px;font-size:clamp(42px,6vw,76px);line-height:1.02;letter-spacing:-4px}.hero h1 span{color:var(--green-dark)}.hero p{max-width:590px;color:var(--muted);font-size:20px;line-height:1.75}.hero-actions{position:relative;z-index:2;display:flex;gap:12px;margin-top:32px}.home-hero .button-primary{border-radius:10px;background:#6eb5f5;color:#0b2d55;box-shadow:0 14px 28px rgba(79,151,224,.28)}.home-hero .button-light{border-radius:10px;background:rgba(255,255,255,.8);border-color:#d3e5f8}.hero-highlights{position:relative;z-index:2;display:grid;grid-template-columns:repeat(3,1fr);grid-gap:10px;gap:10px;margin-top:58px}.hero-highlights div{display:grid;grid-gap:8px;gap:8px;min-height:74px;padding:13px 14px;border:1px solid rgba(116,174,232,.28);border-radius:14px;background:rgba(255,255,255,.56)}.hero-highlights strong{color:#4c9bed;font-size:12px;letter-spacing:.12em}.hero-highlights span{color:#506d8d;font-size:13px;font-weight:700;white-space:nowrap}.hero-visual{position:relative;min-height:430px;display:grid;place-items:center;border-radius:38px;overflow:hidden;background:radial-gradient(circle at 50% 38%,#dceeff,#f5f9ff 64%)}.hero-visual:before{content:"";position:absolute;width:320px;height:320px;border-radius:50%;border:1px solid rgba(66,142,232,.35)}.robot-image{position:relative;z-index:1;width:min(92%,620px)}.robot-image img{width:100%;height:auto;object-fit:contain;mix-blend-mode:multiply}.section{padding:82px 0}.section-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:28px}.section-heading h2{margin:0;font-size:clamp(30px,4vw,50px);letter-spacing:-2px}.section-heading p{max-width:440px;margin:0;color:var(--muted);line-height:1.7}.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);grid-gap:16px;gap:16px}.home-features{padding-top:70px}.home-features .section-heading{padding:0 6px 12px}.home-features .section-heading h2{letter-spacing:-2px}.checkout-card,.feature-card,.legal-card,.plan-card{border:1px solid var(--line);border-radius:24px;background:var(--surface)}.feature-card{min-height:190px;padding:26px;border-color:#dceafa;box-shadow:0 12px 30px rgba(53,109,170,.06);transition:transform .2s ease,box-shadow .2s ease}.feature-card:hover{transform:translateY(-5px);box-shadow:0 18px 38px rgba(53,109,170,.12)}.feature-icon{display:grid;place-items:center;width:44px;height:44px;margin-bottom:28px;border-radius:13px;color:var(--green-dark);background:#e6f2ff;font-weight:900}.feature-card h3{margin:0 0 10px;font-size:18px}.feature-card p{margin:0;color:var(--muted);line-height:1.6;font-size:14px}.business-section{display:grid;grid-template-columns:.9fr 1.1fr;grid-gap:54px;gap:54px;align-items:start;padding-top:26px}.business-intro{position:-webkit-sticky;position:sticky;top:110px}.business-intro h2{margin:16px 0 20px;font-size:clamp(32px,4vw,52px);line-height:1.15;letter-spacing:-2px}.business-intro h2 span{color:var(--green-dark)}.business-intro p{max-width:500px;margin:0;color:var(--muted);line-height:1.9;font-size:16px}.workflow-list{display:grid;grid-gap:12px;gap:12px}.workflow-item{display:grid;grid-template-columns:54px 1fr;grid-gap:18px;gap:18px;align-items:start;padding:22px 24px;border:1px solid #dceafa;border-radius:18px;background:linear-gradient(120deg,#fff,#f7fbff);box-shadow:0 10px 26px rgba(53,109,170,.05)}.workflow-item>strong{display:grid;place-items:center;width:42px;height:42px;border-radius:13px;color:var(--green-dark);background:#e6f2ff;font-size:13px;letter-spacing:.08em}.workflow-item h3{margin:0 0 6px;font-size:18px}.workflow-item p{margin:0;color:var(--muted);line-height:1.65;font-size:14px}.capability-section{padding-top:20px}.capability-grid{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:14px;gap:14px}.capability-grid article{min-height:180px;padding:24px;border:1px solid #dceafa;border-radius:18px;background:#fff;transition:transform .2s ease,box-shadow .2s ease}.capability-grid article:hover{transform:translateY(-4px);box-shadow:0 16px 32px rgba(53,109,170,.1)}.capability-grid article>span{display:grid;place-items:center;width:38px;height:38px;margin-bottom:18px;border-radius:11px;color:var(--green-dark);background:#e6f2ff;font-size:18px;font-weight:800}.capability-grid h3{margin:0 0 8px;font-size:17px}.capability-grid p{margin:0;color:var(--muted);line-height:1.65;font-size:13px}.scenario-section{padding-top:22px}.scenario-panel{display:grid;grid-template-columns:1fr 1fr;grid-gap:50px;gap:50px;padding:48px;border-radius:28px;color:#fff;background:linear-gradient(125deg,#152d4d,#28619a);box-shadow:0 20px 45px rgba(20,58,98,.18)}.scenario-panel .eyebrow{color:#a8d4ff}.scenario-panel h2{margin:16px 0 18px;font-size:clamp(30px,4vw,48px);line-height:1.15;letter-spacing:-2px}.scenario-panel p{max-width:490px;margin:0 0 24px;color:#d4e4f5;line-height:1.8;font-size:15px}.scenario-panel .button-light{border:0;color:#17385f;background:#b8dcff}.scenario-list{display:grid;grid-gap:10px;gap:10px;align-content:center}.scenario-list>div{display:grid;grid-gap:5px;gap:5px;padding:16px 18px;border:1px solid rgba(190,222,255,.2);border-radius:14px;background:rgba(255,255,255,.08)}.scenario-list b{font-size:15px}.scenario-list span{color:#bcd5ee;font-size:13px}.cta-panel{display:flex;align-items:center;justify-content:space-between;gap:30px;padding:34px 38px;border-radius:28px;color:white;background:linear-gradient(105deg,#101d32,#1c4778);box-shadow:0 18px 40px rgba(20,58,98,.18)}.cta-panel h2{margin:0 0 8px;font-size:30px}.cta-panel p{margin:0;color:#b6bfcc}.auth-page{min-height:100vh;display:grid;grid-template-columns:1fr 1fr;background:#fff}.auth-intro{display:flex;flex-direction:column;justify-content:space-between;min-height:100vh;padding:48px 7vw;background:linear-gradient(145deg,#f4f9ff,#e8f4ff)}.auth-copy{max-width:520px;margin:auto 0}.auth-copy h1{margin:20px 0;font-size:clamp(42px,5vw,68px);line-height:1.05;letter-spacing:-3px}.auth-copy p{color:var(--muted);font-size:18px;line-height:1.8}.auth-robot{display:grid;place-items:center;width:min(480px,100%);min-height:280px;margin:0 auto 38px;border-radius:42px;background:rgba(255,255,255,.72);box-shadow:0 30px 70px rgba(66,142,232,.16);overflow:hidden}.auth-robot .robot-image{width:100%}.auth-panel{display:flex;align-items:center;justify-content:center;padding:44px}.auth-form{width:min(430px,100%)}.auth-form h2{margin:14px 0 10px;font-size:40px;letter-spacing:-2px}.auth-form>p{color:var(--muted);line-height:1.6}.field{display:grid;grid-gap:8px;gap:8px;margin-top:20px}.field label{font-size:13px;font-weight:700;color:#3d4654}.field input{width:100%;padding:15px 16px;border:1px solid #dfe6e2;border-radius:13px;outline:none;background:#fbfcfc}.field input:focus{border-color:var(--green-dark);box-shadow:0 0 0 4px rgba(24,217,139,.13)}.consent{display:flex;gap:9px;align-items:flex-start;margin:22px 0;color:var(--muted);font-size:13px;line-height:1.6}.consent input{accent-color:var(--green-dark);margin-top:3px}.form-error{margin:14px 0;padding:11px 13px;border-radius:10px;color:#9a312c;background:#fff0ef;font-size:13px}.auth-form .button{width:100%}.auth-footer{color:#8a93a0;font-size:13px}.page-title{padding:66px 0 34px;background:linear-gradient(180deg,#e8f4ff,var(--soft))}.page-title h1{margin:0 0 12px;font-size:clamp(38px,5vw,64px);letter-spacing:-3px}.page-title p{max-width:650px;margin:0;color:var(--muted);line-height:1.75;font-size:17px}.plans-grid{display:grid;grid-template-columns:repeat(4,1fr);grid-gap:16px;gap:16px;padding:38px 0 90px}.plan-card{position:relative;display:flex;flex-direction:column;padding:25px}.plan-card.featured{border:2px solid var(--green);box-shadow:0 18px 35px rgba(24,217,139,.14)}.plan-badge{position:absolute;top:18px;right:18px;padding:5px 9px;border-radius:99px;color:var(--green-dark);background:#e3f1ff;font-size:11px;font-weight:800}.plan-card h2{margin:0 0 8px;font-size:25px}.plan-audience{min-height:42px;color:var(--muted);font-size:13px;line-height:1.6}.plan-price{margin:24px 0 5px;font-size:30px;font-weight:800}.plan-price small{color:var(--muted);font-size:13px;font-weight:500}.plan-description{min-height:68px;color:var(--muted);font-size:14px;line-height:1.6}.benefits{display:grid;grid-gap:11px;gap:11px;padding:18px 0;margin:10px 0 20px;border-top:1px solid var(--line);color:#4f5966;font-size:14px}.benefit:before{content:"✓";margin-right:8px;color:var(--green-dark);font-weight:800}.plan-card .button{margin-top:auto;width:100%}.checkout-layout{display:grid;grid-template-columns:1.15fr .85fr;grid-gap:20px;gap:20px;padding:40px 0 90px}.checkout-card{padding:28px}.checkout-card h2{margin:0 0 22px;font-size:25px}.option-grid{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:10px;gap:10px;margin-bottom:26px}.option{padding:15px;border:1px solid var(--line);border-radius:15px;text-align:left;background:white;cursor:pointer}.option.active{border-color:var(--green-dark);box-shadow:0 0 0 3px rgba(24,217,139,.12)}.option strong{display:block;margin-bottom:5px}.option span{color:var(--muted);font-size:12px}.pay-methods{display:grid;grid-template-columns:repeat(2,1fr);grid-gap:12px;gap:12px}.pay-method{display:flex;align-items:center;gap:10px;padding:17px;border:1px solid var(--line);border-radius:14px;cursor:pointer;background:white}.pay-method.active{border-color:var(--green-dark);box-shadow:0 0 0 3px rgba(24,217,139,.12)}.pay-icon{display:grid;place-items:center;width:31px;height:31px;border-radius:9px;color:white;font-size:17px;font-weight:800}.pay-icon.wechat{background:#1aad19}.pay-icon.alipay{background:#1677ff}.summary-row{display:flex;justify-content:space-between;gap:12px;padding:14px 0;border-bottom:1px solid var(--line);color:var(--muted)}.summary-row strong{color:var(--ink)}.total{display:flex;justify-content:space-between;align-items:flex-end;padding:24px 0}.total strong{color:var(--green-dark);font-size:36px}.terms-note{color:var(--muted);font-size:12px;line-height:1.7}.modal-backdrop{position:fixed;inset:0;z-index:50;display:grid;place-items:center;padding:20px;background:rgba(11,16,32,.55)}.modal{width:min(470px,100%);padding:30px;border-radius:25px;background:white;box-shadow:0 25px 70px rgba(0,0,0,.22)}.modal h2{margin:0 0 12px;font-size:25px}.modal p{color:var(--muted);line-height:1.75}.modal-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:24px}.legal-wrap{padding:55px 0 90px}.legal-header{margin-bottom:30px}.legal-header h1{margin:0 0 12px;font-size:clamp(38px,5vw,62px);letter-spacing:-3px}.legal-header p{color:var(--muted)}.legal-layout{display:grid;grid-template-columns:230px 1fr;grid-gap:24px;gap:24px;align-items:start}.legal-nav{position:-webkit-sticky;position:sticky;top:96px;display:grid;grid-gap:7px;gap:7px;padding:18px;border-radius:18px;background:white;border:1px solid var(--line)}.legal-nav a{padding:8px 10px;color:var(--muted);border-radius:9px;font-size:13px}.legal-nav a:hover{color:var(--green-dark);background:#edf6ff}.legal-card{padding:40px 48px}.legal-card section{scroll-margin-top:100px;padding-bottom:28px;margin-bottom:28px;border-bottom:1px solid var(--line)}.legal-card section:last-child{padding-bottom:0;margin-bottom:0;border-bottom:0}.legal-card h2{margin:0 0 14px;font-size:23px}.legal-card li,.legal-card p{color:#56606e;line-height:1.9;font-size:15px}.legal-card ul{padding-left:22px}.legal-highlight{padding:17px 20px;margin-bottom:28px;border:1px solid #d7eaff;border-radius:15px;background:#edf6ff;color:#466b91;line-height:1.8}.site-footer{padding:34px 0;border-top:1px solid var(--line);background:white}.footer-inner{display:flex;justify-content:space-between;gap:20px;color:var(--muted);font-size:13px}.footer-links{display:flex;flex-wrap:wrap;gap:16px}@media (max-width:900px){.nav{display:none}.auth-page,.checkout-layout,.hero,.home-hero{grid-template-columns:1fr}.auth-intro{min-height:auto;padding:34px 24px}.auth-copy{margin:45px 0 0}.auth-robot{margin:30px auto 0;width:min(420px,100%);min-height:220px}.auth-panel{padding:55px 24px}.hero{padding-top:55px}.home-hero-art{min-height:360px}.hero-visual{min-height:330px}.feature-grid,.plans-grid{grid-template-columns:repeat(2,1fr)}.business-section,.scenario-panel{grid-template-columns:1fr}.business-intro{position:static}.scenario-panel{gap:28px;padding:34px}.legal-layout{grid-template-columns:1fr}.legal-nav{position:static;display:flex;overflow-x:auto}.legal-card{padding:28px 23px}}@media (max-width:560px){.container{width:min(100% - 28px,1180px)}.site-header{padding:0 14px}.user-chip{display:none}.header-actions .button{padding:9px 13px;font-size:12px}.hero h1{letter-spacing:-2px}.hero p{font-size:16px}.cta-panel,.footer-inner,.hero-actions{flex-direction:column;align-items:stretch}.hero-highlights{margin-top:30px}.capability-grid,.feature-grid,.hero-highlights,.option-grid,.pay-methods,.plans-grid{grid-template-columns:1fr}.workflow-item{grid-template-columns:44px 1fr;gap:12px;padding:18px}.cta-panel,.scenario-panel{padding:26px}}