:root{--brand:#4d6fff;--brand2:#6755e9;--ink:#292f35;--muted:#66717e;--line:#e7eaf0;--soft:#f5f7fb;--max:1340px}*{box-sizing:border-box}[hidden]{display:none!important}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}a{color:inherit}.container{width:min(var(--max),calc(100% - 48px));margin:auto}.header{height:78px;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 3px 14px rgba(15,23,42,.06)}.header-in{height:100%;display:flex;align-items:center}.brand{display:flex;align-items:center;gap:10px;color:var(--brand);font-size:22px;font-weight:900;text-decoration:none}.brand-mark{width:56px;height:56px;border-radius:50%;display:grid;place-items:center;color:#fff;background:linear-gradient(135deg,#285cab,#55b9d7);font-size:24px}.nav{display:flex;gap:4px;margin-left:auto}.nav a{padding:10px 12px;text-decoration:none;font-weight:700;white-space:nowrap}.nav a:hover,.nav a.active{color:var(--brand)}
.hero{min-height:535px;display:grid;place-items:center;color:#fff;text-align:center;background:linear-gradient(135deg,var(--brand),var(--brand2));position:relative;overflow:hidden}.hero:after{content:"";position:absolute;inset:-40% -20% -40% 62%;background:rgba(255,255,255,.07);transform:rotate(40deg)}.hero-inner{max-width:1060px;position:relative;z-index:1}.hero h1{margin:0;font-size:52px}.hero p{font-size:20px;line-height:1.9}.actions{display:flex;justify-content:center;gap:14px;margin-top:34px}.btn{min-height:52px;padding:0 26px;border-radius:10px;display:inline-flex;align-items:center;background:#fff;color:var(--brand);font-weight:850;text-decoration:none}.btn.alt{color:#fff;background:rgba(255,255,255,.18)}
.feature{padding:75px 0;border-bottom:1px solid var(--line)}.feature h2,.cards-title{text-align:center;font-size:38px;margin:0 0 58px}.feature-row{display:grid;grid-template-columns:1fr 1fr;gap:68px;align-items:center}.feature-row.reverse .copy{order:2}.copy{font-size:17px;line-height:2}.placeholder{aspect-ratio:16/10;border:2px dashed #cbd5e1;border-radius:12px;background:linear-gradient(135deg,#f8fafc,#edf2f9);display:grid;place-items:center;text-align:center;color:#8290a5}.placeholder code{display:block;margin-top:8px;font-size:12px}.cards{padding:85px 0}.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.card{min-height:230px;padding:34px;border-radius:12px;background:var(--soft);text-align:center}.card b{width:52px;height:52px;margin:auto;border-radius:14px;display:grid;place-items:center;color:#fff;background:var(--brand);font-size:21px}.card h3{font-size:21px}.card p{color:var(--muted);line-height:1.8}.final-cta{min-height:470px;display:grid;place-items:center;text-align:center;color:#fff;background:linear-gradient(135deg,var(--brand),var(--brand2))}.final-cta h2{font-size:38px;margin:0}.final-cta p{max-width:700px;font-size:17px;line-height:1.9}.footer{padding:32px;text-align:center;color:#8b95a5;border-top:1px solid var(--line)}
.empty-main{min-height:calc(100vh - 143px);padding:90px 0;background:var(--soft)}.empty-card{min-height:430px;border:1px solid var(--line);border-radius:18px;background:#fff;display:grid;place-items:center;text-align:center;box-shadow:0 12px 36px rgba(15,23,42,.06)}.empty-card h1{font-size:40px;margin:0}.empty-card p{color:var(--muted);font-size:17px}.soon{display:inline-block;margin-top:16px;padding:7px 13px;border-radius:999px;color:var(--brand);background:#edf2ff;font-weight:800;font-size:13px}
.pricing-page{background:#f7f8fb}.pricing-intro{padding:34px 0 58px;text-align:center}.pricing-intro h1{margin:0 0 22px;font-size:40px}.pricing-intro p{max-width:760px;margin:6px auto;color:var(--muted);font-size:18px;line-height:1.7}.pricing-intro a{color:#6221a5}.trial-banner{margin-bottom:40px;padding:24px;text-align:center;color:#fff;border-radius:10px;background:linear-gradient(110deg,#4c6eff,#6854e7);box-shadow:0 10px 24px rgba(65,82,196,.15)}.trial-banner h2{margin:0;font-size:22px}.trial-banner p{margin:15px 0}.trial-banner ul{display:flex;justify-content:center;gap:42px;margin:0 0 28px;padding:0;list-style:none;font-size:14px}.trial-banner li:before{content:"●";margin-right:8px;color:#00c682}.trial-button{display:inline-flex;align-items:center;min-height:50px;padding:0 28px;border-radius:9px;background:#fff;color:var(--brand);font-weight:850;text-decoration:none}.pricing-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:48px;padding:0 98px 34px}.price-card{position:relative;min-height:348px;padding:36px;border:1px solid #e3e5ea;border-radius:20px;background:#fff;text-align:center;box-shadow:0 8px 22px rgba(15,23,42,.03)}.price-card.selectable{cursor:pointer;transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease}.price-card.selectable:hover{transform:translateY(-3px);border-color:#9fc8ff;box-shadow:0 12px 28px rgba(15,23,42,.08)}.price-card.selectable>input{position:absolute;opacity:0;pointer-events:none}.price-card.selectable:has(input:checked){border:2px solid #087cf4;box-shadow:0 10px 30px rgba(8,124,244,.14)}.selected-mark{position:absolute;right:18px;top:16px;display:none;padding:5px 9px;border-radius:999px;color:#fff;background:#087cf4;font-size:12px;font-weight:800}.price-card:has(input:checked) .selected-mark{display:block}.package-badge{position:absolute;left:18px;top:16px;padding:5px 9px;border-radius:999px;color:#8a4b08;background:#fff0d6;font-size:12px;font-weight:800}.price-card h2{margin:0 0 24px;font-size:24px}.price{color:#0879eb;font-size:34px;font-weight:900}.price.free{color:#27a745}.price-card ul{margin:32px 0 24px;padding:0;list-style:none;line-height:2.15}.package-tip{margin:0;color:#8a94a3;font-size:13px}.price-action,.payment-actions a{display:inline-flex;align-items:center;justify-content:center;text-decoration:none}.price-action.download{min-height:36px;padding:0 18px;color:#fff;border-radius:20px;background:#27a8ed}.purchase-panel{display:flex;align-items:center;justify-content:space-between;margin-bottom:78px;padding:24px 98px;border:1px solid #e3e7ef;border-radius:16px;background:#fff;box-shadow:0 8px 25px rgba(15,23,42,.05)}.purchase-panel>div{display:flex;flex-direction:column;gap:6px}.purchase-panel span{color:var(--muted);font-size:14px}.purchase-panel strong{font-size:20px}.purchase-button{min-width:190px;min-height:52px;display:inline-flex;align-items:center;justify-content:center;border-radius:9px;color:#fff;background:var(--brand);font-weight:850;text-decoration:none}.purchase-button.disabled{cursor:not-allowed;color:#98a2b3;background:#e4e7ec}.pricing-faq{padding:68px 0 62px;background:#fff}.pricing-faq>div{padding:0 96px}.pricing-faq>div>h2{text-align:center;margin:0 0 46px;font-size:34px}.faq-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}.faq-grid article{min-height:154px;padding:22px 20px;border-radius:8px;background:#f4f5f8}.faq-grid h3{margin:0 0 12px;font-size:17px}.faq-grid p{margin:0;color:#66707d;line-height:1.7}
.lookup-page{min-height:calc(100vh - 143px);padding:34px 0 100px;background:#f7f8fb}.lookup-page h1{text-align:center;margin:0 0 62px;font-size:42px}.lookup-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px}.lookup-card{min-height:440px;padding:34px 30px;border-radius:8px;background:#fff;box-shadow:0 10px 26px rgba(15,23,42,.08)}.lookup-card h2{margin:0 0 14px;font-size:21px}.lookup-help{margin:0 0 20px;color:var(--muted);font-size:14px;line-height:1.7}.type-switch{display:flex;gap:12px;margin:0 0 20px;padding:0;border:0}.type-switch legend{margin-bottom:10px;font-weight:750}.type-switch label{cursor:pointer}.type-switch input{position:absolute;opacity:0}.type-switch span{display:inline-flex;min-height:42px;align-items:center;padding:0 18px;border:1px solid #d8dee9;border-radius:7px;color:#5d6876}.type-switch input:checked+span{border-color:var(--brand);color:var(--brand);background:#eef2ff;box-shadow:0 0 0 1px var(--brand)}.field{display:block;margin-bottom:20px}.field>span{display:block;margin-bottom:9px;font-weight:750}.field input,.field select{width:100%;height:46px;padding:0 13px;border:1px solid #d4dce7;border-radius:8px;background:#fff;font:inherit;outline:none}.field input:focus,.field select:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(77,111,255,.12)}.lookup-submit{width:100%;height:53px;border:0;border-radius:8px;color:#fff;background:var(--brand);font-size:17px;font-weight:800;cursor:pointer}.lookup-submit:hover{background:#3d60ef}.lookup-result{margin-top:20px;padding:16px;border-radius:8px;line-height:1.6}.lookup-result p{margin:5px 0}.lookup-result.error{color:#b42318;background:#fff0ee}.lookup-result.pending{color:#344054;background:#eef3ff}.lookup-guide{margin-top:32px}.lookup-guide>div{display:grid;grid-template-columns:36px 1fr;gap:14px;margin-bottom:24px}.lookup-guide>div>span{width:32px;height:32px;display:grid;place-items:center;border-radius:50%;color:#fff;background:var(--brand);font-weight:850}.lookup-guide p{margin:0;color:var(--muted);line-height:1.7}.lookup-guide b{display:block;margin-bottom:3px;color:var(--ink)}.lookup-price-link{display:inline-flex;min-height:46px;align-items:center;padding:0 20px;border-radius:7px;color:var(--brand);background:#eef2ff;font-weight:800;text-decoration:none}
@media(max-width:1050px){.header{height:auto}.header-in{padding:12px 0;flex-wrap:wrap}.nav{width:100%;overflow:auto;margin:8px 0 0}.hero h1{font-size:39px}.hero p{font-size:17px}.feature-row,.card-grid{grid-template-columns:1fr}.feature-row.reverse .copy{order:initial}.final-cta h2{font-size:31px}.pricing-grid{padding-left:0;padding-right:0}.purchase-panel{padding-left:28px;padding-right:28px}.pricing-faq>div{padding:0}.faq-grid{grid-template-columns:repeat(2,1fr)}.lookup-grid{grid-template-columns:1fr}}
@media(max-width:680px){.pricing-intro h1{font-size:31px}.pricing-intro p{font-size:16px}.trial-banner ul{align-items:center;flex-direction:column;gap:10px}.pricing-grid,.faq-grid{grid-template-columns:1fr}.price-card{min-height:0}.purchase-panel{align-items:stretch;flex-direction:column;gap:20px}.purchase-button{width:100%}.payment-actions{flex-wrap:wrap}}
.download-page h2{text-align:center;margin:0;font-size:38px}.section-lead{text-align:center;color:var(--muted);font-size:16px;line-height:1.7}.download-hero{min-height:374px;display:grid;place-items:center;text-align:center;background:#eef1f7}.download-hero h1{margin:0;font-size:50px}.download-hero p{margin:24px 0 0;color:var(--muted);font-size:20px}.platform-section{padding:105px 0 100px}.platform-section .section-lead{margin:24px auto 56px}.platform-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}.platform-card{min-height:355px;padding:40px 24px;border-radius:8px;background:#f8f9fb;text-align:center;box-shadow:0 8px 20px rgba(15,23,42,.07)}.platform-icon{height:58px;color:var(--brand);font-size:47px;line-height:1}.platform-card h3{margin:15px 0 20px;font-size:24px}.platform-card p{color:var(--muted);line-height:1.7}.download-actions{display:flex;justify-content:center;gap:15px;margin-top:28px}.download-actions a{min-width:114px;min-height:50px;display:inline-flex;align-items:center;justify-content:center;border-radius:8px;color:#fff;background:var(--brand);font-weight:800;text-decoration:none}.history-section{padding:105px 0;background:#eef1f7}.history-section .section-lead,.requirements-section .section-lead,.download-faq .section-lead{margin:20px 0 60px}.history-table-wrap{overflow:auto;border-radius:9px;background:#fff;box-shadow:0 8px 22px rgba(15,23,42,.06)}.history-table{width:100%;min-width:900px;border-collapse:collapse}.history-table th,.history-table td{padding:17px 16px;border-bottom:1px solid #e6e8ec;text-align:left}.history-table th{background:#fafbfc}.history-table td b{display:inline-block;padding:6px 9px;border-radius:4px;color:#fff;background:#08b99a}.history-table a{color:#087bea;text-decoration:none}.requirements-section{padding:105px 0}.requirement-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}.requirement-grid article{min-height:325px;padding:34px 30px;border-radius:8px;background:#f8f9fb;box-shadow:0 8px 20px rgba(15,23,42,.06)}.requirement-grid h3{margin:0 0 22px;font-size:22px}.requirement-grid ul{margin:0;padding:0;list-style:none;color:var(--muted)}.requirement-grid li{margin:14px 0;line-height:1.5}.requirement-grid li:before{content:"✓";margin-right:12px;color:#00b997;font-weight:900}.download-faq{padding:105px 0;background:#eef1f7}.faq-list{display:grid;gap:15px}.faq-list details{border-radius:8px;background:#fff;box-shadow:0 7px 18px rgba(15,23,42,.05)}.faq-list summary{padding:22px 20px;cursor:pointer;font-weight:700;list-style:none}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary:after{content:"⌄";float:right;font-size:22px}.faq-list details[open] summary:after{transform:rotate(180deg)}.faq-list details p{margin:0;padding:0 20px 22px;color:var(--muted);line-height:1.7}
@media(max-width:1050px){.platform-grid,.requirement-grid{grid-template-columns:1fr}.download-hero h1{font-size:40px}.download-page h2{font-size:32px}}
@media(max-width:680px){.download-hero{min-height:300px}.download-hero h1{font-size:33px}.download-hero p{font-size:16px}.platform-section,.history-section,.requirements-section,.download-faq{padding:70px 0}.download-actions{flex-wrap:wrap}}
.header{position:sticky;top:0;z-index:1000;box-shadow:0 4px 12px rgba(15,23,42,.10)}.download-page{color:#2b3135}.download-page h2{font-weight:800;letter-spacing:-1px}.download-hero{min-height:374px;background:#edf0f6}.download-hero h1{font-size:50px;font-weight:850;letter-spacing:-1px}.download-hero p{color:#657079}.platform-section{padding-top:106px;padding-bottom:100px}.platform-section .section-lead{margin-top:22px;margin-bottom:58px}.platform-card{height:355px;min-height:355px;padding:39px 24px 35px;background:#f8f9fb}.platform-icon{height:55px;display:flex;align-items:center;justify-content:center;color:#4d6fff;font-weight:800}.apple-icon{font-family:-apple-system,BlinkMacSystemFont,sans-serif;font-size:43px}.linux-icon{font-size:47px;transform:scaleX(.78)}.windows-icon{width:40px;margin:0 auto;display:grid;grid-template-columns:repeat(2,17px);grid-template-rows:repeat(2,17px);gap:3px;transform:perspective(70px) rotateY(-8deg)}.windows-icon i{display:block;background:#4d6fff}.platform-card h3{margin:13px 0 19px;font-size:24px;font-weight:850}.platform-card p{margin:0 0 20px;font-size:16px}.download-actions{margin-top:29px}.download-actions a{height:50px;font-size:16px}.history-section{padding-top:106px;padding-bottom:106px;background:#edf0f6}.history-section .section-lead{margin-top:20px;margin-bottom:61px}.history-table th{height:57px;font-size:16px}.history-table td{height:69px}.requirements-section{padding-top:107px;padding-bottom:99px}.requirements-section .section-lead{margin-top:20px;margin-bottom:59px}.requirement-grid article{height:326px;min-height:326px;padding:34px 30px;background:#f8f9fb}.download-faq{padding-top:106px;padding-bottom:114px;background:#edf0f6}.download-faq .section-lead{margin-top:20px;margin-bottom:59px}.faq-list{gap:15px}.faq-list summary{min-height:66px;padding:21px 20px}.footer{background:#293135;color:#c5cbd2}
@media(max-width:1050px){.platform-card,.requirement-grid article{height:auto;min-height:320px}}
.udid-page{background:#f7f8fb}.udid-hero{padding:70px 0 64px;text-align:center}.udid-hero .eyebrow{margin:0 0 14px;color:var(--brand);font-weight:800}.udid-hero h1{margin:0;font-size:46px;letter-spacing:-1px}.udid-hero>div>p:last-child{max-width:800px;margin:22px auto 0;color:var(--muted);font-size:18px;line-height:1.8}.udid-workspace{display:grid;grid-template-columns:1.55fr .75fr;gap:30px;padding-bottom:78px}.udid-validator,.udid-summary{padding:34px;border-radius:12px;background:#fff;box-shadow:0 10px 28px rgba(15,23,42,.07)}.udid-validator h2,.udid-summary h2{margin:0 0 10px;font-size:24px}.udid-validator>p{margin:0 0 25px;color:var(--muted)}.udid-validator label{display:block;margin-bottom:9px;font-weight:750}.udid-input-row{display:grid;grid-template-columns:1fr 132px;gap:12px}.udid-input-row input{height:52px;padding:0 15px;border:1px solid #d4dce7;border-radius:8px;font:inherit;text-transform:uppercase;outline:none}.udid-input-row input:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(77,111,255,.12)}.udid-input-row button{border:0;border-radius:8px;color:#fff;background:var(--brand);font-size:16px;font-weight:800;cursor:pointer}.udid-result{min-height:52px;margin-top:18px;padding:15px;border-radius:8px;color:#667085;background:#f6f7f9}.udid-result.error{color:#b42318;background:#fff0ee}.udid-result.success{display:flex;align-items:center;justify-content:space-between;color:#067647;background:#ecfdf3}.udid-result button{padding:7px 12px;border:0;border-radius:6px;color:#fff;background:#079455;cursor:pointer}.privacy-note{display:flex;gap:12px;margin-top:20px;padding:15px;border:1px solid #cfe2ff;border-radius:8px;color:#344054;background:#f2f7ff}.privacy-note>span{color:var(--brand);font-weight:900}.privacy-note p{margin:0;line-height:1.55}.privacy-note b{display:block}.udid-summary ul{margin:24px 0;padding:0;list-style:none}.udid-summary li{margin:17px 0;color:var(--muted)}.udid-summary li:before{content:"✓";margin-right:10px;color:#00ad84;font-weight:900}.udid-summary a{color:var(--brand);font-weight:800;text-decoration:none}.udid-methods{padding:82px 0;background:#fff}.udid-methods h2,.udid-explainer h2{text-align:center;margin:0;font-size:36px}.udid-methods .section-lead{margin:16px 0 48px}.method-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}.method-card{position:relative;min-height:340px;padding:32px;border:1px solid #e1e6ee;border-radius:12px;background:#fff;box-shadow:0 8px 22px rgba(15,23,42,.05)}.method-card.recommended{border:2px solid var(--brand)}.method-tag{position:absolute;right:18px;top:17px;padding:5px 10px;border-radius:999px;color:#fff;background:var(--brand);font-size:12px;font-weight:800}.method-icon{width:52px;height:52px;display:grid;place-items:center;border-radius:14px;color:var(--brand);background:#eef2ff;font-size:20px;font-weight:900}.method-card h3{margin:20px 0;font-size:21px}.method-card ol{margin:0;padding-left:23px;color:var(--muted)}.method-card li{margin:13px 0;line-height:1.5}.udid-explainer{padding:82px 0 90px}.udid-explainer h2{margin-bottom:45px}.explain-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}.explain-grid article{padding:28px;border-radius:10px;background:#fff}.explain-grid h3{margin:0 0 14px}.explain-grid p{margin:0;color:var(--muted);line-height:1.75}
.udid-scan-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px;padding-bottom:50px}.scan-card,.scan-steps{min-height:490px;padding:34px 30px;border-radius:12px;background:#fff;box-shadow:0 10px 28px rgba(15,23,42,.07)}.scan-card{text-align:center}.scan-card h2,.scan-steps h2{margin:0 0 22px;font-size:22px}.qr-frame{width:260px;height:260px;margin:0 auto 22px;padding:10px;display:grid;place-items:center;border:1px solid #d9e0ea;border-radius:9px;background:#fff}.qr-frame img{width:238px;height:238px}.qr-frame #qr-loading{color:var(--muted)}.scan-card>p{max-width:430px;margin:0 auto 18px;color:var(--muted);line-height:1.7}.scan-status{font-weight:700;color:#667085}.scan-status.success{color:#067647}.scan-status.error{color:#b42318}.scan-card>button{margin-top:14px;padding:10px 18px;border:0;border-radius:7px;color:#fff;background:var(--brand);font-weight:800;cursor:pointer}.scan-steps ol{margin:26px 0 0;padding:0;list-style:none}.scan-steps li{display:grid;grid-template-columns:28px 1fr;gap:12px;margin:19px 0}.scan-steps li>span{width:25px;height:25px;display:grid;place-items:center;border-radius:50%;color:#fff;background:var(--brand);font-weight:800}.scan-steps li p{margin:1px 0;color:#4f5965;line-height:1.55}.scan-security{margin-top:30px;padding:17px;border:1px solid #f2d38b;border-radius:8px;color:#76520b;background:#fff8e6}.scan-security p{margin:6px 0 0;line-height:1.55}
@media(max-width:1050px){.udid-scan-grid,.udid-workspace{grid-template-columns:1fr}.method-grid,.explain-grid{grid-template-columns:1fr}.udid-hero h1{font-size:38px}}
@media(max-width:680px){.udid-hero{padding:50px 0}.udid-hero h1{font-size:31px}.udid-input-row{grid-template-columns:1fr}.udid-input-row button{height:50px}.udid-validator,.udid-summary{padding:24px}.udid-result.success{align-items:flex-start;flex-direction:column;gap:12px}}