.dtb-v2{--dtb2-blue:#2454ff;--dtb2-ink:#10254c;--dtb2-muted:#65718a;--dtb2-paper:#fff;--dtb2-soft:#f2f5fc;--dtb2-orange:#fc9147;padding-top:78px;background:var(--dtb2-paper);color:var(--dtb2-ink);font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;line-height:1.75;overflow-x:clip}
.dtb-v2 *,.dtb-v2 *::before,.dtb-v2 *::after{box-sizing:border-box}
.dtb-v2 h1,.dtb-v2 h2,.dtb-v2 h3,.dtb-v2 p,.dtb-v2 figure{margin:0}
.dtb-v2 a{color:inherit;text-decoration:none}.dtb-v2 a:focus-visible,.dtb-v2 summary:focus-visible{outline:3px solid #fc9147;outline-offset:5px}
.dtb2-shell{width:min(1240px,calc(100% - 96px));margin-inline:auto}
.dtb2-hero{position:relative;background:#fff}
.dtb2-hero-layout{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:center;padding-block:72px 64px}
.dtb2-hero-copy{position:relative;z-index:2}.dtb2-brand{display:inline-flex;align-items:center;gap:11px;font-size:17px;font-weight:650;line-height:1.5}.dtb2-brand img{width:38px;height:38px;object-fit:cover;border-radius:9px;border:1px solid #edf0f5}
.dtb2-hero h1{font-size:clamp(42px,4.7vw,66px);line-height:1.36;letter-spacing:-.05em;font-weight:650;margin-top:25px;white-space:nowrap}
.dtb2-hero-description{font-size:18px;line-height:1.9;color:var(--dtb2-muted);margin-top:24px!important;letter-spacing:.015em}
.dtb2-actions{display:flex;align-items:center;flex-wrap:wrap;gap:13px;margin-top:30px}
.dtb2-button{display:inline-flex;align-items:center;justify-content:center;min-height:49px;padding:13px 29px;font-size:14px;font-weight:600;line-height:1.5;border:1px solid transparent;border-radius:7px;transition:background .18s,color .18s,border-color .18s}
.dtb2-button-primary{background:var(--dtb2-blue);border-color:var(--dtb2-blue);color:#fff!important;box-shadow:0 8px 20px rgba(36,84,255,.15)}.dtb2-button-primary:hover{background:#1743e5;border-color:#1743e5}.dtb2-button-secondary{background:#fff;color:#1d3f82!important;border-color:#c8d4ec}.dtb2-button-secondary:hover{background:#f3f6ff;border-color:#879fc9}
.dtb2-availability{font-size:11px;color:#8090a7;line-height:1.85;margin-top:17px!important}
.dtb2-product-stage{position:relative;height:600px;isolation:isolate;min-width:0}
.dtb2-stage-plane{position:absolute;top:60px;bottom:58px;left:24px;right:-20px;background:#edf2ff;border-radius:50% 35% 44% 37%;transform:rotate(-9deg);z-index:-2}
.dtb2-stage-plane::after{content:"";position:absolute;width:112px;height:112px;border-radius:50%;background:#fbe3cd;right:0;top:5px;z-index:-1}
.dtb2-phone{position:absolute;padding:9px;background:#fbfcff;border:1px solid #d8dfeb;border-radius:38px;box-shadow:0 18px 45px rgba(46,66,117,.15),0 3px 9px rgba(46,66,117,.08)}
.dtb2-phone-screen{border-radius:30px;overflow:hidden;background:#f5f5f2;position:relative}.dtb2-phone-screen>img{display:block;width:100%;height:auto}
.dtb2-phone-home{width:290px;left:10px;top:60px;z-index:2;transform:rotate(-6deg)}
.dtb2-screen-home{aspect-ratio:1/1.6;overflow:hidden}
.dtb2-phone-guide{width:230px;right:0;top:17px;transform:rotate(7deg);z-index:1;padding:7px;border-radius:30px;opacity:.97}.dtb2-phone-guide .dtb2-phone-screen{border-radius:24px;aspect-ratio:468/1015}
.dtb2-stage-label{position:absolute;left:46px;bottom:56px;display:flex;align-items:center;gap:9px;padding:12px 16px;border-radius:8px;background:#fff;box-shadow:0 7px 25px rgba(36,65,114,.1);font-size:11px;color:#34517a;z-index:4;white-space:nowrap}
.dtb2-label-dot{width:7px;height:7px;background:var(--dtb2-orange);border-radius:50%}
.dtb2-product-stage figcaption{position:absolute;bottom:14px;left:0;right:0;text-align:center;color:#8b98ac;font-size:10px;line-height:1.7}
.dtb2-product-navigation{display:flex;justify-content:space-around;gap:30px;border-top:1px solid #e5eaf3;border-bottom:1px solid #e5eaf3;padding-block:18px;font-size:14px;color:#466184}.dtb2-product-navigation a{display:inline-flex;min-height:44px;align-items:center;padding-inline:15px}.dtb2-product-navigation a:hover{color:var(--dtb2-blue)}
.dtb2-section{padding-block:100px;scroll-margin-top:100px}.dtb2-intro h2,.dtb2-help h2{font-size:clamp(29px,3.2vw,43px);font-weight:600;line-height:1.48;letter-spacing:-.035em}.dtb2-intro>p:not(.dtb2-section-topic){font-size:15px;line-height:2;color:var(--dtb2-muted);max-width:420px;margin-top:21px}
.dtb2-text-link{display:inline-flex;min-height:44px;align-items:center;color:var(--dtb2-blue)!important;font-size:13px;font-weight:600;margin-top:20px;border-bottom:1px solid #a9bbf7}.dtb2-text-link:hover{border-bottom-color:var(--dtb2-blue)}
.dtb2-application-layout{display:grid;grid-template-columns:.9fr 1.1fr;gap:110px}.dtb2-section-topic{font-size:12px;font-weight:600;color:var(--dtb2-blue);margin-bottom:16px!important}.dtb2-application-content{padding-left:5px}.dtb2-application-content>.dtb2-section-topic{margin-bottom:21px!important}
.dtb2-application-steps{margin:0;padding:0 0 0 23px;list-style:decimal;counter-reset:none}.dtb2-application-steps li{padding-left:13px;padding-bottom:27px;color:#7894df;font-size:13px}.dtb2-application-steps li:last-child{padding-bottom:0}.dtb2-application-steps h3{font-size:20px;color:#19345d;font-weight:550;line-height:1.55}.dtb2-application-steps p{font-size:14px;line-height:1.95;color:#65718a;margin-top:8px;max-width:480px}.dtb2-context-note{font-size:11px;color:#7b8da4;margin-top:27px!important;padding-top:18px;border-top:1px solid #e7ecf5}
.dtb2-devices{background:#f3f6fc}.dtb2-devices-layout{display:grid;grid-template-columns:1.1fr .9fr;gap:100px;align-items:center}.dtb2-device-diagram{background:#fff;padding:35px 38px 26px;border-radius:20px;box-shadow:0 14px 45px rgba(69,88,130,.05)}.dtb2-diagram-top{display:flex;align-items:center;gap:16px;color:#173d77;font-size:19px;font-weight:550}.dtb2-diagram-top svg{width:45px;height:45px;color:var(--dtb2-blue)}.dtb2-device-route{display:flex;justify-content:space-between;gap:20px;margin-top:40px;position:relative;isolation:isolate}.dtb2-device-route::before{content:"";position:absolute;left:6px;right:15%;top:6px;height:1px;background:#c5d3f4;z-index:-1}.dtb2-route-node{display:block;width:13px;height:13px;background:#fff;border:3px solid var(--dtb2-blue);border-radius:50%;box-shadow:0 0 0 6px #fff;margin-bottom:23px}.dtb2-device-route h3{font-size:15px;font-weight:550;line-height:1.55}.dtb2-device-route p{font-size:11px;color:#8190a6;margin-top:9px;line-height:1.8}.dtb2-diagram-caption{font-size:10px;text-align:right;color:#9aa6b8;margin-top:33px!important}.dtb2-simple-list{padding:0;list-style:none;margin:24px 0 0}.dtb2-simple-list li{font-size:13px;color:#476183;line-height:1.9;margin-top:10px;padding-left:20px;position:relative}.dtb2-simple-list li::before{content:"";position:absolute;left:0;top:.75em;width:6px;height:6px;border-radius:50%;background:#91a9ed}
.dtb2-records-layout{display:grid;grid-template-columns:1fr 1fr;gap:110px;align-items:center}.dtb2-intro>.dtb2-records-note{font-size:11px!important;line-height:1.9!important;color:#8a96aa!important;margin-top:24px!important}.dtb2-record-types{display:grid;gap:32px}.dtb2-record-types>div{display:grid;grid-template-columns:45px 1fr;gap:3px 19px;align-items:center}.dtb2-record-icon{display:flex;align-items:center;justify-content:center;grid-row:1/3;width:45px;height:45px;background:#edf2ff;color:var(--dtb2-blue);border-radius:11px}.dtb2-record-icon svg{width:25px;height:25px}.dtb2-record-types h3{font-size:19px;font-weight:550;line-height:1.6}.dtb2-record-types p{font-size:13px;line-height:1.9;color:#6b7b94}
.dtb2-download{background:var(--dtb2-blue);color:#fff;padding-block:64px}.dtb2-download-layout{display:flex;align-items:center;justify-content:space-between;gap:70px}.dtb2-download h2{font-size:39px;font-weight:550;line-height:1.5;letter-spacing:-.02em}.dtb2-download p{font-size:14px;line-height:1.95;color:#cbd8ff;margin-top:17px}.dtb2-download-actions{display:grid;grid-template-columns:1fr 1fr;gap:13px;min-width:370px}.dtb2-button-white{background:#fff;color:#244ed9!important;border-color:#fff}.dtb2-button-white:hover{background:#e8eeff;border-color:#e8eeff}.dtb2-button-white-outline{background:transparent;border-color:#8fa7ff;color:#fff!important}.dtb2-button-white-outline:hover{background:#3a66ff}.dtb2-download-actions>p{grid-column:1/-1;font-size:11px!important;text-align:center;margin-top:4px!important}
.dtb2-help-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:85px}.dtb2-help h2{font-size:30px;line-height:1.6}.dtb2-help-layout>div>p{font-size:13px;line-height:1.9;color:#7a879e;margin-top:16px}.dtb2-faq-list{border-top:1px solid #dbe2ee}.dtb2-faq{border-bottom:1px solid #e3e9f2}.dtb2-faq summary{display:flex;align-items:center;justify-content:space-between;gap:20px;list-style:none;font-size:15px;font-weight:550;padding-block:21px;min-height:64px;cursor:pointer}.dtb2-faq summary::-webkit-details-marker{display:none}.dtb2-faq summary::after{content:"+";font-size:22px;line-height:1;color:#4c70c9;font-weight:400}.dtb2-faq[open] summary::after{content:"−"}.dtb2-faq p{font-size:13px;line-height:2;color:#6b7b94;padding:0 26px 24px 0}
.dtb2-legal{display:flex;justify-content:space-between;align-items:center;gap:25px;padding-block:24px;border-top:1px solid #e2e8f2;color:#8090a6;font-size:10px;line-height:1.8}.dtb2-legal nav{display:flex;flex-wrap:wrap;gap:21px}.dtb2-legal a{display:inline-flex;min-height:30px;align-items:center;color:#577296;text-decoration:underline;text-underline-offset:4px}
@media(min-width:1600px){.dtb2-shell{width:min(1320px,calc(100% - 160px))}.dtb2-hero-layout{gap:60px}.dtb2-hero h1{font-size:70px}.dtb2-product-stage{height:650px}.dtb2-phone-home{width:315px;top:65px;left:15px}.dtb2-phone-guide{width:250px;right:8px;top:20px}.dtb2-stage-label{bottom:63px}}
@media(max-width:1100px){.dtb2-shell{width:calc(100% - 64px)}.dtb2-hero-layout{gap:25px;padding-block:60px 44px}.dtb2-hero h1{font-size:49px}.dtb2-hero-description{font-size:16px}.dtb2-product-stage{height:510px}.dtb2-phone-home{width:245px;top:53px;left:0;padding:8px;border-radius:32px}.dtb2-phone-home .dtb2-phone-screen{border-radius:25px}.dtb2-phone-guide{width:192px;right:0;top:16px;border-radius:27px}.dtb2-phone-guide .dtb2-phone-screen{border-radius:22px}.dtb2-stage-plane{top:53px;bottom:57px;left:0;right:-10px}.dtb2-stage-label{left:18px;bottom:48px;font-size:10px;padding:10px 13px}.dtb2-product-stage figcaption{font-size:9px;bottom:13px}.dtb2-section{padding-block:80px}.dtb2-application-layout,.dtb2-devices-layout,.dtb2-records-layout{gap:65px}.dtb2-device-diagram{padding:30px 26px 23px}.dtb2-device-route{gap:15px}.dtb2-device-route h3{font-size:14px}.dtb2-device-route p{font-size:10px}.dtb2-help-layout{gap:50px}.dtb2-download-layout{gap:40px}.dtb2-download h2{font-size:34px}.dtb2-download-actions{min-width:325px}.dtb2-download-actions .dtb2-button{padding-inline:20px;font-size:13px}}
@media(max-width:800px){.dtb2-shell{width:calc(100% - 48px)}.dtb2-hero-layout{grid-template-columns:1fr;gap:20px;padding-block:44px 25px}.dtb2-hero-copy{max-width:590px}.dtb2-hero h1{font-size:55px;line-height:1.35}.dtb2-hero-description{font-size:16px}.dtb2-wide-break{display:none}.dtb2-product-stage{width:470px;max-width:100%;height:540px;margin-inline:auto!important}.dtb2-phone-home{width:265px;top:60px;left:20px}.dtb2-phone-guide{width:210px;top:20px;right:10px}.dtb2-stage-label{left:40px;bottom:44px;font-size:10px}.dtb2-stage-plane{right:0;left:0;bottom:58px}.dtb2-product-stage figcaption{bottom:11px}.dtb2-hero-description{max-width:480px}.dtb2-availability br{display:none}.dtb2-availability{display:block;max-width:100%}.dtb2-product-navigation{gap:12px;padding-block:11px;font-size:13px}.dtb2-product-navigation a{padding-inline:8px}.dtb2-section{padding-block:65px}.dtb2-application-layout,.dtb2-devices-layout,.dtb2-records-layout,.dtb2-help-layout{grid-template-columns:1fr;gap:34px}.dtb2-intro h2{font-size:34px}.dtb2-intro h2 br{display:none}.dtb2-intro>p:not(.dtb2-section-topic){max-width:100%;font-size:14px;margin-top:17px}.dtb2-application-content{padding-left:0}.dtb2-application-steps p{max-width:100%}.dtb2-device-diagram{grid-row:2;padding:31px;max-width:580px;width:100%}.dtb2-device-route p{font-size:11px}.dtb2-devices-layout>.dtb2-intro{grid-row:1}.dtb2-record-types{grid-template-columns:1fr;gap:24px}.dtb2-download-layout{display:block}.dtb2-download h2{font-size:34px}.dtb2-download h2 br{display:none}.dtb2-download-actions{max-width:370px;min-width:0;margin-top:28px}.dtb2-help h2{font-size:29px}.dtb2-help-layout>div>p{margin-top:12px}.dtb2-legal{flex-direction:column;align-items:flex-start;gap:9px}.dtb2-legal nav{gap:19px}}
@media(max-width:540px){.dtb-v2{padding-top:70px}.dtb2-shell{width:calc(100% - 40px)}.dtb2-hero-layout{padding-top:34px;gap:17px}.dtb2-brand{font-size:15px;gap:9px}.dtb2-brand img{width:33px;height:33px;border-radius:8px}.dtb2-hero h1{font-size:clamp(34px,9.5vw,45px);line-height:1.42;letter-spacing:-.045em;margin-top:22px}.dtb2-hero-description{font-size:14px;line-height:1.95;margin-top:18px!important}.dtb2-actions{margin-top:24px;gap:11px}.dtb2-button{min-height:47px;font-size:13px;padding:12px 25px}.dtb2-availability{font-size:10px;line-height:1.9;max-width:285px}.dtb2-availability br{display:initial}.dtb2-product-stage{height:430px;width:350px;max-width:100%;margin-top:8px!important}.dtb2-phone-home{width:215px;left:7px;top:43px;padding:7px;border-radius:28px}.dtb2-phone-home .dtb2-phone-screen{border-radius:22px}.dtb2-phone-guide{width:166px;right:0;top:9px;padding:5px;border-radius:23px}.dtb2-phone-guide .dtb2-phone-screen{border-radius:18px}.dtb2-stage-plane{top:40px;bottom:47px;left:0;right:-7px}.dtb2-stage-plane::after{width:75px;height:75px;right:0;top:0}.dtb2-stage-label{font-size:9px;gap:7px;padding:9px 11px;border-radius:7px;bottom:34px;left:16px}.dtb2-label-dot{width:5px;height:5px}.dtb2-product-stage figcaption{font-size:8px;bottom:0}.dtb2-product-navigation{font-size:12px;gap:3px;padding-block:8px}.dtb2-product-navigation a{padding-inline:5px;min-height:44px}.dtb2-section{padding-block:54px}.dtb2-intro h2{font-size:30px;line-height:1.5;letter-spacing:-.025em}.dtb2-intro h2 br{display:initial}.dtb2-intro>p:not(.dtb2-section-topic){font-size:13px;line-height:1.95;margin-top:17px}.dtb2-text-link{font-size:12px;margin-top:14px}.dtb2-application-layout{gap:29px}.dtb2-section-topic{font-size:11px;margin-bottom:13px!important}.dtb2-application-content>.dtb2-section-topic{margin-bottom:18px!important}.dtb2-application-steps{padding-left:19px}.dtb2-application-steps li{font-size:12px;padding-left:8px;padding-bottom:24px}.dtb2-application-steps h3{font-size:18px}.dtb2-application-steps p{font-size:12px;line-height:1.95;margin-top:7px}.dtb2-context-note{font-size:10px;line-height:1.9;margin-top:21px!important;padding-top:15px}.dtb2-devices-layout{gap:27px}.dtb2-device-diagram{padding:26px 22px 20px;border-radius:15px}.dtb2-diagram-top{font-size:17px;gap:12px}.dtb2-diagram-top svg{width:36px;height:36px}.dtb2-device-route{margin-top:29px;gap:10px}.dtb2-device-route::before{right:17%;top:5px}.dtb2-route-node{width:11px;height:11px;border-width:2px;margin-bottom:19px}.dtb2-device-route h3{font-size:12px;white-space:nowrap}.dtb2-device-route p{font-size:9px;line-height:1.8;margin-top:7px;max-width:66px}.dtb2-diagram-caption{font-size:8px;margin-top:26px!important}.dtb2-simple-list{margin-top:18px}.dtb2-simple-list li{font-size:12px;margin-top:9px}.dtb2-records-layout{gap:28px}.dtb2-record-types{gap:24px}.dtb2-record-types>div{grid-template-columns:40px 1fr;gap:3px 14px}.dtb2-record-icon{width:40px;height:40px;border-radius:10px}.dtb2-record-icon svg{width:22px;height:22px}.dtb2-record-types h3{font-size:17px}.dtb2-record-types p{font-size:11px}.dtb2-intro>.dtb2-records-note{font-size:10px!important;line-height:1.9!important}.dtb2-download{padding-block:47px}.dtb2-download h2{font-size:30px;line-height:1.5}.dtb2-download h2 br{display:initial}.dtb2-download p{font-size:12px;line-height:1.9;margin-top:17px}.dtb2-download-actions{margin-top:24px;gap:10px;max-width:340px}.dtb2-download-actions .dtb2-button{font-size:12px;padding-inline:18px;min-height:47px}.dtb2-download-actions>p{font-size:10px!important}.dtb2-help-layout{gap:25px}.dtb2-help h2{font-size:26px}.dtb2-help-layout>div>p{font-size:12px;margin-top:10px}.dtb2-faq summary{font-size:13px;line-height:1.8;min-height:61px;padding-block:18px;gap:18px}.dtb2-faq summary::after{font-size:20px}.dtb2-faq p{font-size:12px;line-height:1.95;padding-right:10px;padding-bottom:21px}.dtb2-legal{font-size:9px;padding-block:21px}.dtb2-legal nav{gap:16px}.dtb2-legal a{min-height:32px}}
@media(max-width:374px){.dtb2-shell{width:calc(100% - 32px)}.dtb2-hero h1{font-size:33px}.dtb2-product-stage{height:403px}.dtb2-phone-home{width:200px;left:4px}.dtb2-phone-guide{width:154px}.dtb2-stage-label{font-size:8px;left:8px;bottom:33px}.dtb2-device-diagram{padding-inline:18px}.dtb2-product-navigation{font-size:11px}.dtb2-button{padding-inline:22px}}
@media(prefers-reduced-motion:reduce){.dtb-v2 *,.dtb-v2 *::before,.dtb-v2 *::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}