:root{
  --navy:#071b38;--navy2:#0b2f60;--blue:#1468ff;--blue2:#3ba9ff;--cyan:#26d5ff;
  --text:#0b1f3a;--muted:#617087;--line:#dfe8f3;--soft:#f5f9ff;--white:#fff;
  --green:#14a56a;--orange:#ff9f1c;--shadow:0 18px 60px rgba(18,66,125,.12);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--text);background:#fff}
a{text-decoration:none;color:inherit}
button{font:inherit}
img{max-width:100%;display:block}
.container{width:min(1180px,calc(100% - 40px));margin:auto}
.header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.9);backdrop-filter:blur(16px);border-bottom:1px solid rgba(221,231,242,.9)}
.navbar{height:72px;display:flex;align-items:center;gap:28px}
.brand{display:flex;align-items:center;gap:10px;min-width:max-content}
.brand img{width:40px;height:40px}
.brand-copy{display:flex;flex-direction:column}
.brand-copy strong{font-size:17px;letter-spacing:-.3px}
.brand-copy small{font-size:10px;color:var(--muted)}
.navlinks{margin-left:auto;display:flex;align-items:center;gap:22px;font-size:14px;font-weight:700}
.navlinks a:hover{color:var(--blue)}
.actions{display:flex;align-items:center;gap:10px}
.lang-link{padding:9px 12px;border:1px solid #d7e3f1;border-radius:9px;background:#fff;font-weight:800}
.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:10px;padding:11px 17px;border:1px solid transparent;font-weight:800;font-size:14px;transition:.2s;cursor:pointer}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:linear-gradient(135deg,#1269ff,#0055df);color:#fff;box-shadow:0 10px 26px rgba(18,105,255,.24)}
.btn-secondary{background:#fff;border-color:#c9d7e8}
.btn-dark{background:var(--navy);color:#fff}
.btn-lg{padding:15px 22px;font-size:15px}
.mobile-menu{display:none;border:0;background:#eef4fb;border-radius:8px;padding:9px 11px}
.eyebrow,.kicker{display:inline-flex;align-items:center;gap:8px;border-radius:999px;padding:7px 11px;background:#eaf3ff;color:#1268ff;font-size:12px;font-weight:900}
.hero{overflow:hidden;position:relative}
.hero::before{content:"";position:absolute;width:600px;height:600px;border-radius:50%;background:radial-gradient(circle,rgba(41,164,255,.18),transparent 68%);right:-140px;top:-140px;pointer-events:none}
.hero-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:52px;align-items:center;min-height:650px;padding:72px 0}
.hero h1{font-size:58px;line-height:1.03;letter-spacing:-2.6px;margin:18px 0 20px}
.hero p{font-size:18px;line-height:1.72;color:var(--muted);max-width:690px}
.hero-cta{display:flex;gap:12px;margin:28px 0 22px;flex-wrap:wrap}
.trust-row{display:flex;gap:20px;flex-wrap:wrap;color:#4e6079;font-size:13px}
.blue{color:var(--blue)}
.section{padding:78px 0}
.section.soft{background:var(--soft)}
.section-head{max-width:760px;margin:0 auto 38px;text-align:center}
.section-head h2{font-size:40px;letter-spacing:-1.4px;margin:13px 0}
.section-head p{color:var(--muted);line-height:1.7}
.card{background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow)}
.product-ui{position:relative;min-height:470px}
.mock-window{position:absolute;inset:15px 5px 15px 15px;border:1px solid #dce6f2;border-radius:20px;background:#fff;box-shadow:var(--shadow);overflow:hidden}
.window-top{height:44px;background:#f7f9fc;border-bottom:1px solid #e6edf5;display:flex;align-items:center;gap:7px;padding:0 14px;color:#77879a;font-size:11px}
.window-top i{width:9px;height:9px;border-radius:50%;background:#d5deea}
.window-body{display:grid;grid-template-columns:.8fr 1.2fr;height:calc(100% - 44px)}
.editor-side{padding:24px;background:#f8fbff}
.photo-placeholder{height:180px;border-radius:14px;background:linear-gradient(145deg,#0b6a45,#19a76c);position:relative;overflow:hidden}
.photo-placeholder:after{content:"";position:absolute;left:8%;right:8%;top:46%;height:14px;border-radius:50%;border:10px solid rgba(255,255,255,.18);box-shadow:0 0 0 12px rgba(0,0,0,.06)}
.fake-lines{display:grid;gap:10px;margin-top:18px}
.fake-lines span{height:9px;background:#dde7f2;border-radius:999px}
.fake-lines span:nth-child(2){width:72%}.fake-lines span:nth-child(3){width:88%}
.ai-panel{padding:24px}
.ai-title{display:flex;align-items:center;gap:10px}
.ai-title img{width:30px}
.score{margin-left:auto;color:#0b945c;background:#e9f9f1;border-radius:8px;padding:7px 10px;font-weight:900;font-size:12px}
.tabbar{display:flex;gap:18px;border-bottom:1px solid #e9eef5;padding:18px 0 12px;color:#77869a;font-size:12px}
.tabbar strong{color:var(--blue)}
.ai-list{display:grid;gap:12px;margin:18px 0}
.ai-item{padding:12px 14px;border:1px solid #e4ebf4;border-radius:12px;background:#fbfdff}
.ai-item strong{display:block;font-size:13px}.ai-item span{font-size:12px;color:var(--muted)}
.floating-launcher{position:fixed;right:22px;bottom:24px;z-index:40;width:64px;height:64px;border-radius:18px;border:2px solid rgba(38,213,255,.65);background:linear-gradient(145deg,#061b3d,#0e6eff);box-shadow:0 14px 34px rgba(4,42,91,.3);display:grid;place-items:center;cursor:pointer}
.floating-launcher img{width:52px;height:52px;border-radius:14px;object-fit:cover}
.floating-launcher.pulse-once{animation:pulse .8s ease}
@keyframes pulse{50%{transform:scale(1.12);box-shadow:0 0 0 14px rgba(38,213,255,.12)}}
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.feature-card{padding:26px;border-radius:20px;border:1px solid #e2eaf4;background:#fff}
.feature-card .icon{width:50px;height:50px;border-radius:14px;display:grid;place-items:center;background:#eef5ff;color:var(--blue);font-size:23px;font-weight:900;margin-bottom:18px}
.feature-card h3{margin:0 0 10px;font-size:18px}.feature-card p{margin:0;color:var(--muted);line-height:1.65;font-size:14px}
.flow{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.flow-step{position:relative;padding:20px;border:1px solid #dce7f3;border-radius:16px;background:#fff;text-align:center}
.flow-step:not(:last-child):after{content:"→";position:absolute;right:-15px;top:45%;color:#7da8df;font-size:22px;z-index:2}
.flow-step b{display:block;color:var(--blue);font-size:12px;margin-bottom:8px}.flow-step strong{font-size:14px}
.data-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center}
.keyword-table{padding:20px}
.table-title{display:flex;align-items:center;gap:9px;margin-bottom:14px}
.table-title img{width:28px}
.row{display:grid;grid-template-columns:1.8fr .8fr .8fr .5fr;gap:10px;padding:12px 10px;border-top:1px solid #edf2f7;font-size:13px}
.row.head{border:0;background:#f6f9fd;border-radius:8px;color:#718096;font-weight:800}
.badge{display:inline-block;border-radius:6px;padding:3px 6px;background:#e9f9f1;color:#0d995e;font-weight:900;text-align:center}
.low{color:#17925b}.medium{color:#d38b00}
.checks{list-style:none;padding:0;margin:20px 0}.checks li{margin:12px 0;color:#43566f}.checks li:before{content:"✓";display:inline-grid;place-items:center;width:20px;height:20px;border-radius:50%;background:var(--green);color:#fff;margin-right:9px;font-size:12px}
.cta-band{background:linear-gradient(135deg,#071d3f,#0b5fde);color:#fff;border-radius:24px;padding:42px 46px;display:flex;align-items:center;justify-content:space-between;gap:30px;box-shadow:0 22px 50px rgba(7,56,127,.22)}
.cta-band h2{font-size:34px;margin:0 0 10px}.cta-band p{color:#d9e8ff;max-width:720px;line-height:1.7;margin:0}.cta-actions{display:flex;gap:10px;flex-wrap:wrap}
.btn-light{background:#fff;color:#071d3f}.btn-outline{border-color:rgba(255,255,255,.6);color:#fff}
.pricing-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;max-width:930px;margin:auto}
.price-card{padding:26px;border:1px solid #dfe8f3;border-radius:20px;background:#fff;position:relative}
.price-card.popular{border:2px solid var(--blue);box-shadow:0 16px 42px rgba(18,104,255,.12)}
.popular-label{position:absolute;top:-13px;left:50%;transform:translateX(-50%);background:var(--blue);color:#fff;border-radius:999px;padding:6px 12px;font-size:11px;font-weight:900}
.price{font-size:38px;font-weight:900;margin:10px 0}.price small{font-size:12px;color:#79879a;font-weight:500}
.price-card ul{list-style:none;padding:0;min-height:150px}.price-card li{margin:12px 0;color:#4d6078;font-size:13px}.price-card li:before{content:"✓";color:var(--green);font-weight:900;margin-right:8px}
.footer{padding:30px 0;border-top:1px solid #e1e9f2;background:#fff}
.footer-grid{display:grid;grid-template-columns:1fr auto auto;gap:28px;align-items:center}.footer-links{display:flex;gap:18px;color:#637389;font-size:13px}.footer small{color:#8b98aa}

/* Chinese design language */
.zh-page .hero{background:
  linear-gradient(90deg,rgba(255,255,255,.96),rgba(244,249,255,.96)),
  radial-gradient(circle at 70% 20%,rgba(20,104,255,.18),transparent 40%)}
.zh-page .hero-grid{grid-template-columns:1.05fr .95fr}
.zh-page .hero h1{font-size:54px}
.zh-page .pain-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.zh-page .pain-card{padding:22px;border-radius:18px;background:#fff;border:1px solid #e1e9f3}
.zh-page .pain-card b{font-size:28px;color:var(--blue);display:block;margin-bottom:9px}
.zh-page .pain-card h3{font-size:17px;margin:0 0 8px}
.zh-page .pain-card p{font-size:13px;color:var(--muted);line-height:1.6;margin:0}
.zh-page .solution-banner{display:grid;grid-template-columns:1.1fr .9fr;gap:34px;align-items:center}
.zh-page .logic-board{padding:22px;background:#071d3e;border-radius:22px;color:#fff}
.zh-page .logic-board .flow-step{background:#0d2f60;border-color:#1d4f8b;color:#fff}
.zh-page .logic-board .flow-step strong{font-size:13px}
.zh-page .logic-board .flow-step:not(:last-child):after{color:#52cfff}

/* English design language */
.en-page .hero{background:linear-gradient(180deg,#fff 0%,#f7fbff 100%)}
.en-page .hero-grid{min-height:700px}
.en-page .hero h1{font-size:64px;max-width:720px}
.en-page .outcomes{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:28px}
.en-page .outcome{padding:20px;border-top:3px solid var(--blue);background:#fff;border-radius:0 0 14px 14px;box-shadow:0 10px 30px rgba(30,72,128,.08)}
.en-page .outcome strong{font-size:18px}.en-page .outcome p{font-size:13px;color:var(--muted);margin:7px 0 0;line-height:1.55}
.en-page .logo-strip{display:flex;justify-content:center;gap:36px;flex-wrap:wrap;color:#324b70;font-size:18px;font-weight:900}
.en-page .proof{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.en-page .proof-card{padding:26px;border-radius:18px;background:linear-gradient(180deg,#fff,#f8fbff);border:1px solid #e2eaf4}
.en-page .proof-card strong{font-size:32px;color:var(--blue);display:block}.en-page .proof-card span{color:var(--muted);font-size:13px}

@media(max-width:1050px){
 .navlinks{display:none;position:absolute;top:72px;left:20px;right:20px;background:#fff;border:1px solid #dfe8f3;border-radius:14px;box-shadow:var(--shadow);padding:18px;flex-direction:column;align-items:flex-start}
 .navlinks.open{display:flex}.mobile-menu{display:block;margin-left:auto}.actions{margin-left:0}
 .hero-grid,.data-grid,.zh-page .solution-banner{grid-template-columns:1fr}.product-ui{min-height:460px}
 .feature-grid{grid-template-columns:repeat(2,1fr)}.pain-grid{grid-template-columns:repeat(2,1fr)!important}.flow{grid-template-columns:1fr}
 .flow-step:not(:last-child):after{content:"↓";right:auto;left:50%;top:auto;bottom:-22px}.pricing-grid{grid-template-columns:1fr;max-width:560px}.proof,.outcomes{grid-template-columns:1fr!important}
 .footer-grid{grid-template-columns:1fr}.cta-band{flex-direction:column;align-items:flex-start}
}
@media(max-width:650px){
 .container{width:min(100% - 24px,1180px)}.navbar{height:64px}.brand-copy small,.actions .btn-primary{display:none}.lang-link{font-size:12px;padding:8px}
 .hero-grid{padding:48px 0;min-height:auto}.hero h1,.zh-page .hero h1,.en-page .hero h1{font-size:42px;letter-spacing:-1.8px}.hero p{font-size:16px}.hero-cta{flex-direction:column}
 .product-ui{min-height:390px}.mock-window{inset:0}.window-body{grid-template-columns:1fr}.editor-side{display:none}.ai-panel{padding:18px}
 .section{padding:56px 0}.section-head h2{font-size:30px}.feature-grid,.pain-grid{grid-template-columns:1fr!important}.row{grid-template-columns:1.5fr .7fr .7fr .45fr;font-size:11px;padding:10px 5px}
 .cta-band{padding:30px 24px}.cta-band h2{font-size:29px}.footer-links{flex-wrap:wrap}.floating-launcher{right:14px;bottom:16px;width:58px;height:58px}
}

.app-shell{min-height:calc(100vh - 72px);background:linear-gradient(135deg,#f5f9ff,#fff);padding:54px 0}
.auth-card{width:min(500px,100%);margin:auto;padding:30px}
.auth-card h1{font-size:32px;margin:0 0 8px}
.auth-card>p{color:var(--muted);line-height:1.65}
.field{display:grid;gap:7px;margin:15px 0}
.field label{font-size:13px;font-weight:800}
.field input,.field select{width:100%;padding:13px 14px;border:1px solid #cfdceb;border-radius:10px;background:#fff;color:var(--text);outline:none}
.field input:focus,.field select:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(20,104,255,.10)}
.form-msg{min-height:22px;margin:10px 0;font-size:13px;color:#c33}.form-msg.ok{color:var(--green)}
.app-grid{display:grid;grid-template-columns:260px 1fr;gap:22px}
.sidebar{padding:20px;height:max-content;position:sticky;top:94px}
.sidebar a{display:block;padding:12px 13px;border-radius:9px;color:#4c5f78;font-size:14px;font-weight:700}
.sidebar a:hover,.sidebar a.active{background:#eef5ff;color:var(--blue)}
.dashboard{display:grid;gap:20px}
.account-hero{padding:26px;display:flex;justify-content:space-between;gap:20px;align-items:center}
.account-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.stat{padding:20px}.stat strong{font-size:28px;display:block;color:var(--blue)}.stat span{color:var(--muted);font-size:13px}
.keyword-tool{padding:26px}
.keyword-form{display:grid;grid-template-columns:1fr 150px auto;gap:10px}
.keyword-form input,.keyword-form select{padding:13px;border:1px solid #cfdceb;border-radius:10px}
.results-table{margin-top:20px;overflow-x:auto}
.results-table table{width:100%;border-collapse:collapse;font-size:13px}
.results-table th,.results-table td{padding:12px 10px;border-bottom:1px solid #e8eef5;text-align:left}
.results-table th{color:#718096;background:#f7f9fc}
.source-tag{display:inline-block;padding:4px 7px;background:#eef5ff;color:#1268ff;border-radius:6px;font-size:11px;font-weight:800}
.download-card{padding:28px;display:grid;grid-template-columns:1fr auto;gap:30px;align-items:center}
.dev-warning{padding:13px 15px;border:1px solid #ffd28a;background:#fff8e9;color:#835700;border-radius:10px;font-size:13px;line-height:1.6}
@media(max-width:850px){.app-grid{grid-template-columns:1fr}.sidebar{position:static}.account-stats{grid-template-columns:1fr}.keyword-form{grid-template-columns:1fr}.download-card{grid-template-columns:1fr}}