:root{--ink:#0b1221;--muted:#687386;--blue:#0755ff;--line:#e6eaf1;--soft:#f5f7fb;--white:#fff;font-family:Arial,Helvetica,sans-serif;color:var(--ink);background:white;font-synthesis:none}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:105px}body{margin:0}a{color:inherit;text-decoration:none}button,input,textarea,select{font:inherit}button,a,input,textarea,summary{-webkit-tap-highlight-color:transparent}button{cursor:pointer}a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid #487fff;outline-offset:4px}[hidden]{display:none!important}.wrap{max-width:1360px;margin:auto;padding:0 56px}.header{position:sticky;top:0;z-index:20;background:#ffffffed;backdrop-filter:blur(16px);border-bottom:1px solid #edf0f5}.header-inner{display:flex;align-items:center;justify-content:space-between;height:90px;gap:28px}.brand{width:254px;flex-shrink:0;margin-left:-18px}.brand img{width:100%;height:auto;display:block}.header nav{display:flex;gap:32px;font-size:14px;color:#414d60}.header nav a:hover,.text-link:hover{color:var(--blue)}.button{display:inline-flex;align-items:center;justify-content:center;padding:17px 27px;min-height:50px;border:1px solid transparent;border-radius:100px;background:var(--ink);color:white;font-size:15px;font-weight:500;transition:background .2s,box-shadow .2s,transform .2s}.button:hover{background:var(--blue);box-shadow:0 8px 24px #0755ff26;transform:translateY(-2px)}.button.small{padding:12px 22px;min-height:44px;font-size:14px}.button.outline{background:#ffffffa8;border-color:#cfd6e3;color:var(--ink)}.button.outline:hover{background:#f0f5ff;border-color:#9ab8ff}.button.light{background:white;color:var(--ink);flex-shrink:0}.button.light:hover{background:#e5eeff}.skip{position:fixed;top:-80px;left:16px;z-index:50;background:var(--ink);color:white;padding:15px}.skip:focus{top:16px}.scroll-progress{position:fixed;top:0;left:0;height:3px;width:100%;transform:scaleX(0);transform-origin:left;background:var(--blue);z-index:30}.hero{background:radial-gradient(ellipse at 85% 32%,#dfeaff 0,transparent 50%),linear-gradient(120deg,white 40%,#f4f7ff);overflow:hidden}.hero-grid{display:grid;grid-template-columns:1.13fr 1fr;gap:22px;min-height:654px;align-items:center;padding-top:48px;padding-bottom:54px}.eyebrow{margin:0 0 22px;font-size:12px;letter-spacing:.18em;line-height:1.6;color:#8892a5}.hero h1{font-size:clamp(40px,4.1vw,57px);line-height:1.06;letter-spacing:-.045em;font-weight:650;margin:0}.hero h1 span{color:var(--blue)}.hero-description{font-size:17px;line-height:1.65;color:var(--muted);max-width:560px;margin:26px 0}.hero-values{display:flex;gap:22px;margin:30px 0}.hero-values>span{display:flex;align-items:center;gap:9px;font-size:12px;line-height:1.5;color:#687386}.hero-values i{background:#edf3ff;color:var(--blue);width:39px;height:43px;display:grid;place-items:center;border-radius:12px;flex-shrink:0}.icon{display:block;width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:32px}.hero-stage{position:relative;min-height:525px;isolation:isolate}.hero-art{position:absolute;width:110%;height:auto;top:-38px;left:-6%;mix-blend-mode:multiply;pointer-events:none;transition:transform .3s 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20px;min-height:243px}.demo-heading{display:flex;gap:10px;align-items:center}.demo-heading>i{width:38px;height:38px;background:#edf3ff;display:grid;place-items:center;color:var(--blue);border-radius:12px}.demo-heading strong{display:block;font-size:14px;font-weight:600}.demo-heading span{display:block;color:#929caf;font-size:11px;margin-top:4px}.power{display:grid;place-items:center;background:white;border:1px solid #dbe6ff;border-radius:50%;width:66px;height:66px;margin:16px auto 8px;color:var(--blue);box-shadow:0 6px 20px #0755ff12;transition:background .2s}.power .icon{width:27px;height:27px}.power[aria-pressed=true]{background:var(--blue);color:white;box-shadow:0 0 0 7px #0755ff12}.vpn-state{text-align:center;font-size:12px;color:var(--muted);margin:12px 0}.server-label{display:flex;justify-content:space-between;align-items:center;font-size:11px;color:var(--muted);padding-top:8px}.server-label select{border:0;color:var(--ink);background:#f2f5fa;padding:7px 8px;border-radius:7px;font-size:12px;max-width:160px}.stage-bottom{position:absolute;bottom:0;left:20px;right:8px;display:flex;justify-content:space-between;gap:12px;font-size:10px;color:#7487a8}.demo-mini{--accent:#0755ff}.demo-mini h4{font-size:17px;margin:20px 0 12px;letter-spacing:-.03em}.palette{display:flex;gap:9px;margin-top:16px}.palette button{width:26px;height:26px;border-radius:50%;border:3px solid white;box-shadow:0 0 0 1px #d8dfeb;padding:0}.palette button[aria-pressed=true]{box-shadow:0 0 0 2px var(--ink)}.mini-task{border-radius:11px;background:#f5f7fb;padding:13px;font-size:12px;margin-top:18px;display:flex;gap:12px;align-items:center}.mini-task i{background:var(--accent);color:white;border-radius:8px;padding:7px}.mini-task .icon{width:18px;height:18px}.demo-mini 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#edf1f6}.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:100px;align-items:center}.about p:not(.eyebrow){font-size:16px;line-height:1.7;color:var(--muted);max-width:480px}.text-link{display:inline-block;color:var(--blue);font-size:14px;padding:10px 0;border-bottom:1px solid #c9d9ff;margin-top:8px}.principles{display:grid;gap:12px}.principles article{display:flex;align-items:center;gap:20px;background:white;border:1px solid #eaf0f9;padding:26px;border-radius:16px}.principles article>span{font-size:11px;color:#8995a9}.principles h3{font-size:18px;font-weight:600;letter-spacing:-.02em;margin:0 0 7px}.principles article p{font-size:13px!important;line-height:1.5!important;margin:0}.principles article>i{color:var(--blue);margin-left:auto;flex-shrink:0}.process-tabs{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;border-bottom:1px solid var(--line);padding-bottom:22px}.process-tabs button{display:grid;grid-template-columns:45px 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@media(min-width:1600px){.hero h1{font-size:60px}.hero-stage{min-height:550px}}@media(max-width:1100px){.header-inner{gap:18px}.brand{width:225px}.header nav{gap:22px}.wrap{padding-left:36px;padding-right:36px}.hero-grid{gap:10px;min-height:610px}.hero h1{font-size:45px}.hero-values{gap:12px}.hero-values>span{font-size:11px;gap:7px}.hero-stage{min-height:490px}.hero-art{top:-4px;width:118%;left:-10%}.demo-card{right:-4px;width:274px}.stage-caption{left:0}.stage-bottom{left:0}.section-heading{gap:40px}h2{font-size:35px}.service-grid{grid-template-columns:1fr 1fr;gap:18px}.service-card{min-height:320px}.service-card h3{min-height:0}.about-grid{gap:50px}.principles article{padding:23px 20px;gap:14px}.process-tabs{gap:8px}.process-tabs button{padding:14px 10px;gap:9px}.process-tabs strong{font-size:12px}.builder-form,.builder-summary{padding:28px}.wizard-progress{gap:12px;font-size:10px}.product-choices label>span{padding:16px 12px;grid-template-columns:22px 1fr;gap:8px}.product-choices strong{font-size:12px}.product-choices small{font-size:10px}.product-choices .icon{width:19px;height:19px}.feature-choices span{font-size:12px;padding:17px 12px}.closing{margin-left:36px;margin-right:36px}.closing h2{font-size:29px}.footer p{max-width:180px}}
@media(max-width:760px){html{scroll-padding-top:85px}.wrap{padding-left:24px;padding-right:24px}.header-inner{height:78px;gap:10px}.brand{width:203px;margin-left:-19px}.header nav{display:none}.header .button{font-size:12px;padding:12px 14px;min-height:40px;white-space:nowrap}.hero-grid{grid-template-columns:1fr;padding-top:38px;padding-bottom:24px;gap:18px}.hero h1{font-size:clamp(36px,7.8vw,53px);line-height:1.1}.eyebrow{font-size:10px;margin-bottom:20px}.hero-description{font-size:16px;margin:22px 0;line-height:1.65;max-width:550px}.hero-values{gap:14px;flex-wrap:wrap;margin:24px 0}.hero-values>span{font-size:11px;gap:8px}.hero-values i{width:34px;height:38px;border-radius:10px}.hero-values .icon{width:19px;height:19px}.hero-actions{gap:10px;margin-top:24px}.button{font-size:14px;padding:14px 20px;min-height:46px}.hero-stage{min-height:450px;margin-top:12px;max-width:520px;width:100%;justify-self:center}.hero-art{top:-28px;width:103%;left:-2%}.demo-card{width:280px;right:0;bottom:30px}.stage-caption{top:10px;right:0;left:0}.stage-bottom{right:0;left:0;font-size:9px;gap:8px}.section{padding-top:58px;padding-bottom:58px}.section-heading{display:block;margin-bottom:28px}.section-heading>p{font-size:15px;margin-top:22px}h2{font-size:33px}.service-grid{grid-template-columns:1fr 1fr;gap:12px}.service-card{padding:20px 17px;min-height:334px;border-radius:16px}.card-top{margin-bottom:20px}.card-top>i{width:38px;height:38px;border-radius:12px}.service-card h3{font-size:20px;line-height:1.2;min-height:48px}.service-card>p{font-size:13px;line-height:1.65;margin-bottom:16px}.card-tags{gap:5px;margin-bottom:20px}.card-tags span{font-size:9px;padding:5px}.detail-button{font-size:13px}.about-grid{grid-template-columns:1fr;gap:30px}.about p:not(.eyebrow){font-size:15px}.principles article{padding:21px;gap:16px}.principles h3{font-size:17px}.principles article p{font-size:12px!important}.process-tabs{grid-template-columns:1fr 1fr;gap:10px;padding-bottom:18px}.process-tabs button{padding:14px 10px;grid-template-columns:40px 1fr}.process-tabs strong{font-size:13px}.process-tabs i{width:36px;height:36px;border-radius:11px}.process-panel{grid-template-columns:1fr;gap:17px;padding:26px 0 0;min-height:220px}.process-panel h3{font-size:24px}.process-panel>p{font-size:15px}.builder{grid-template-columns:1fr;border-radius:18px}.builder-form{padding:24px}.wizard-progress{gap:14px;font-size:10px;flex-wrap:wrap;padding-bottom:20px;margin-bottom:25px}.builder-form h3{font-size:22px}.product-choices{gap:10px}.product-choices label>span{display:flex;flex-direction:column;padding:16px 12px;min-height:126px;gap:9px}.product-choices strong{font-size:13px}.product-choices small{font-size:11px}.builder-summary{padding:28px}.builder-summary h3{font-size:29px}.summary-top{margin-bottom:22px}.summary-modules{grid-template-columns:1fr 1fr;gap:12px 16px}.summary-modules>span{font-size:12px}.builder-summary p{font-size:14px;margin-bottom:23px}.summary-bottom{margin-top:26px}.form-note{font-size:11px}.form-row{grid-template-columns:1fr;gap:18px}.feature-choices{gap:10px}.feature-choices span{font-size:12px;padding:16px 12px;min-height:64px}.closing{margin:40px 24px;padding:32px 26px;display:block;border-radius:18px}.closing h2{font-size:27px}.closing .button{margin-top:26px}.footer{gap:15px 20px;padding-bottom:28px}.footer-brand{font-size:21px}.footer p{font-size:11px;max-width:140px;margin:0 auto 0 0}.footer>span{font-size:11px}.desktop-break{display:none}dialog{padding:35px 26px}dialog h2{font-size:29px}dialog>p{font-size:15px}}
@media(max-width:420px){.wrap{padding-left:20px;padding-right:20px}.brand{width:164px}.header .button{font-size:11px;padding:10px 12px}.hero h1{font-size:37px}.hero-values{gap:12px 10px}.hero-values>span{font-size:10px;gap:7px}.hero-values i{width:29px;height:34px}.hero-stage{min-height:403px}.hero-art{top:-6px}.demo-card{width:258px;right:0;bottom:28px}.tiny-label{font-size:9px}.stage-caption{top:8px}.service-grid{grid-template-columns:1fr}.service-card{min-height:0;padding:26px}.service-card h3{font-size:24px;min-height:0}.service-card h3 br{display:none}.service-card>p{font-size:15px;margin-bottom:22px}.card-tags span{font-size:11px}.detail-button{font-size:14px}.builder-form{padding:21px}.wizard-progress{gap:12px;font-size:9px}.feature-choices{grid-template-columns:1fr}.summary-modules{grid-template-columns:1fr}.closing{margin-left:20px;margin-right:20px}.hero-actions .button{font-size:13px;padding:14px 17px}.result-actions{gap:16px;flex-wrap:wrap}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}.motion-ready [data-reveal]{opacity:1;transform:none}}

/* Language control and layouts for translated copy. */
.header-actions{display:flex;align-items:center;gap:17px;flex-shrink:0}.language-switch{display:flex;align-items:center;gap:6px;color:#67758b;padding:8px 8px 8px 10px;border:1px solid #e6eaf2;border-radius:100px;background:#f8faff}.language-switch>.icon{width:17px;height:17px;flex-shrink:0}.language-switch select{font-size:13px;font-weight:500;color:#243049;background:transparent;border:0;cursor:pointer;min-height:25px;max-width:68px;padding:0 2px;outline-offset:5px}.language-switch:hover{border-color:#a6c0fb;background:#f0f5ff}.hero h1{overflow-wrap:normal}.summary-modules span{overflow-wrap:anywhere}html[lang="en"] .hero h1{font-size:clamp(39px,3.9vw,54px)}html[lang="zh-CN"]{font-family:Arial,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif}html[lang="zh-CN"] h1,html[lang="zh-CN"] h2,html[lang="zh-CN"] h3{letter-spacing:0;line-height:1.25}html[lang="zh-CN"] .eyebrow{letter-spacing:.1em}.demo-card{min-height:310px}.demo-tabs button{font-size:12px}.demo-heading span{font-size:12px}.chat-bubble{min-height:65px;font-size:12px}.demo-mini .mini-task{line-height:1.5}.stage-bottom{flex-wrap:wrap}html[lang="en"] .wizard-progress{gap:14px}html[lang="en"] .product-choices strong{line-height:1.4}html[lang="en"] .product-choices label>span{min-height:109px}html[lang="en"] .hero-values>span{font-size:12px}.language-switch select option{font:inherit}.header nav{gap:24px}
@media(max-width:1100px){.header-inner{gap:20px}.header nav{gap:15px}.header-actions{gap:12px}.header .brand{width:208px}.header .button.small{font-size:13px;padding:12px 17px}html[lang="en"] .hero h1{font-size:43px}}
@media(max-width:940px){.header nav{display:none}.header .brand{width:225px}.header-actions{gap:20px}}
@media(max-width:760px){.header .brand{width:203px}.header-actions{gap:10px}.header-actions .button{display:none}.language-switch{padding:7px 8px 7px 10px}.language-switch select{font-size:13px}.header-inner{gap:12px}.hero-stage{min-height:473px}html[lang="en"] .hero h1{font-size:clamp(36px,7.8vw,53px)}html[lang="en"] .hero-values{gap:14px}html[lang="en"] .hero-values>span{font-size:11px}.form-note{font-size:12px}.wizard-progress{font-size:11px;gap:12px}html[lang="en"] .wizard-progress{gap:12px}.demo-card{width:min(300px,100%)}html[lang="zh-CN"] .hero h1{font-size:clamp(34px,7.8vw,48px)}}
@media(max-width:420px){.header .brand{width:184px}.hero-stage{min-height:429px}.demo-card{width:270px;max-width:100%}html[lang="en"] .hero h1{font-size:37px}html[lang="en"] .hero-values>span{font-size:10px}.wizard-progress{font-size:10px}.feature-choices span{font-size:14px}.product-choices small{font-size:12px}}