*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#f5f7f9;color:#17212b;font-family:Arial,"Microsoft YaHei","PingFang SC",sans-serif;line-height:1.75}a{color:inherit;text-decoration:none}img{display:block;max-width:100%}.skip-link{position:absolute;left:-9999px}.skip-link:focus{left:12px;top:12px;background:#fff;padding:8px;z-index:99}.site-header{position:sticky;top:0;z-index:60;background:rgba(245,247,249,.96);border-bottom:1px solid #d9e0e6;backdrop-filter:blur(9px)}.header-inner{max-width:1220px;height:72px;margin:auto;padding:0 24px;display:flex;align-items:center;gap:28px}.brand{display:flex;align-items:center;gap:10px;margin-right:auto}.brand>span{background:#244c68;color:#fff;border-radius:6px;padding:7px 10px;font-weight:900}.brand div strong,.brand div small{display:block}.brand small{font-size:9px;letter-spacing:.12em;color:#7b8d99}.desktop-nav{display:flex;gap:21px;color:#536b7a;font-size:14px}.header-cta{background:#244c68;color:#fff;border-radius:7px;padding:10px 15px;font-weight:900}.menu-btn,.mobile-nav{display:none}.hero{max-width:1220px;margin:auto;padding:72px 24px 64px;display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}.eyebrow,.section-label,.final-cta p{font-size:11px;letter-spacing:.14em;text-transform:uppercase;font-weight:900;color:#bd5f42}.hero h1{font-size:clamp(44px,5.8vw,74px);line-height:1.04;letter-spacing:-.045em;margin:10px 0 20px}.hero-lead{font-size:18px;color:#60727f}.hero-lead strong{color:#244c68}.hero-actions{display:flex;gap:12px;margin-top:28px}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:50px;padding:0 22px;border-radius:7px;font-weight:900}.primary{background:#244c68;color:#fff}.ghost{background:#fff;border:1px solid #ccd7df}.transfer-note{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-top:25px}.transfer-note span{background:#e4ebef;padding:8px 10px;border-radius:5px;font-size:12px;font-weight:800}.transfer-note b{color:#bd5f42}.desktop-window{border:1px solid #ccd7df;background:#fff;border-radius:15px;overflow:hidden;box-shadow:0 28px 60px rgba(48,70,87,.14)}.window-bar{height:38px;background:#e8edf1;display:flex;align-items:center;gap:6px;padding:0 12px;color:#7b8a95;font-size:10px}.window-bar i{width:8px;height:8px;border-radius:50%;background:#a7b4bd}.window-bar span{margin-left:6px}.desktop-window img{height:330px;width:100%;object-fit:contain;background:#11161b}.system-tags{display:flex;justify-content:center;gap:8px;margin-top:12px}.system-tags span{background:#244c68;color:#fff;padding:8px 14px;border-radius:18px;font-size:11px;font-weight:900}.preview-section,.switch-section,.steps-section,.file-section{max-width:1200px;margin:auto;padding:74px 24px}.preview-head,.switch-copy,.steps-head{max-width:800px}.preview-head h2,.choose-head h2,.switch-copy h2,.steps-head h2,.file-copy h2,.faq-head h2{font-size:clamp(30px,4vw,48px);line-height:1.16;letter-spacing:-.03em;margin:7px 0 14px}.preview-head>p:last-child,.choose-head>p:last-child,.steps-head>p:last-child,.file-copy p,.faq-head>p:last-child{color:#697c89}.preview-grid{display:grid;grid-template-columns:1.4fr .8fr .8fr;gap:14px;margin-top:28px}.preview-grid figure{margin:0;background:#fff;border:1px solid #d6e0e6;border-radius:13px;overflow:hidden}.preview-grid img{width:100%;height:250px;object-fit:contain;background:#e9eef2}.preview-grid .wide img{object-fit:contain}.preview-grid figcaption{padding:11px 13px;font-size:12px;color:#6c7f8c}.choose-section{background:#172a38;color:#fff;padding:70px max(24px,calc((100vw - 1200px)/2))}.choose-head{max-width:780px}.choose-head .section-label{color:#f4a085}.choose-head>p:last-child{color:#b9c7cf}.choose-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px;margin-top:30px}.choose-grid article{padding:28px;border-radius:13px}.choose-grid .windows{background:#244c68}.choose-grid .mac{background:#f2f5f7;color:#182631}.choose-grid span{font-size:10px;letter-spacing:.12em;font-weight:900;color:#f4a085}.mac span{color:#bd5f42}.choose-grid h3{font-size:29px;margin:10px 0 8px}.choose-grid p{color:#c2d0d7}.mac p{color:#627683}.route{display:flex;gap:7px;align-items:center;flex-wrap:wrap;margin:19px 0}.route b{border:1px solid currentColor;border-radius:6px;padding:7px 10px;font-size:11px}.route i{font-style:normal}.choose-grid a{font-weight:900;border-bottom:1px solid currentColor}.switch-list{display:grid;grid-template-columns:repeat(4,1fr);gap:11px;margin-top:28px}.switch-list div{background:#fff;border-top:4px solid #bd5f42;padding:19px}.switch-list span{font-size:10px;color:#bd5f42;font-weight:900}.switch-list strong{display:block;margin:8px 0}.switch-list p{font-size:13px;color:#6c7e8a}.steps-section{padding-top:42px}.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:11px;margin-top:30px}.steps-grid article{background:#e9eef2;border:1px solid #d5dfe6;border-radius:11px;padding:20px;min-height:220px}.steps-grid span{width:35px;height:35px;display:grid;place-items:center;background:#244c68;color:#fff;border-radius:6px;font-size:10px;font-weight:900}.steps-grid h3{font-size:19px;margin:12px 0 7px}.steps-grid p{font-size:13px;color:#657985}.file-section{display:grid;grid-template-columns:.95fr 1.05fr;gap:50px;align-items:center}.file-section figure{margin:0;background:#fff;border:1px solid #d5dfe6;border-radius:13px;padding:13px}.file-section img{height:280px;width:100%;object-fit:contain}.file-section figcaption{font-size:11px;color:#70818c;padding:8px 2px 0}.file-copy ul{padding-left:20px;color:#607481}.faq-section{background:#eef2f5;padding:70px max(24px,calc((100vw - 1200px)/2));display:grid;grid-template-columns:.7fr 1.3fr;gap:50px}.faq-list details{background:#fff;border:1px solid #d6e0e6;border-radius:9px;padding:17px 18px;margin-bottom:9px}.faq-list summary{font-weight:900;cursor:pointer}.faq-list p{color:#667986;margin-bottom:0}.final-cta{max-width:1200px;margin:54px auto 76px;background:#bd5f42;color:#fff;border-radius:13px;padding:34px 38px;display:flex;align-items:center;justify-content:space-between;gap:28px}.final-cta p{color:#ffe0d7;margin:0}.final-cta h2{font-size:30px;margin:4px 0}.final-cta span{color:#ffe4dc}.final-btn{background:#fff;color:#273846}.site-footer{max-width:1200px;margin:auto;padding:0 24px 34px;display:flex;justify-content:space-between;gap:22px;color:#70838f}.site-footer p{font-size:13px;margin:3px 0}.mobile-download-bar{display:none}
@media(max-width:900px){.desktop-nav,.header-cta{display:none}.menu-btn{display:block;border:1px solid #ccd7df;background:#fff;border-radius:6px;padding:8px}.mobile-nav.open{display:flex}.mobile-nav{gap:14px;flex-wrap:wrap;padding:8px 24px 16px}.hero{grid-template-columns:1fr}.preview-grid{grid-template-columns:1fr 1fr}.preview-grid .wide{grid-column:1/-1}.choose-grid{grid-template-columns:1fr}.switch-list{grid-template-columns:1fr 1fr}.steps-grid{grid-template-columns:1fr 1fr}.file-section{grid-template-columns:1fr}.faq-section{grid-template-columns:1fr}}
@media(max-width:600px){body{padding-bottom:72px}.header-inner{height:64px;padding:0 16px}.brand small{display:none}.hero{padding:46px 16px 36px;gap:28px}.hero h1{font-size:40px}.hero-lead{font-size:16px}.hero-actions{flex-direction:column}.desktop-window img{height:225px}.preview-section,.switch-section,.steps-section,.file-section{padding-left:16px;padding-right:16px}.preview-grid{grid-template-columns:1fr}.preview-grid .wide{grid-column:auto}.choose-section,.faq-section{padding-left:16px;padding-right:16px}.switch-list,.steps-grid{grid-template-columns:1fr}.file-section img{height:220px}.final-cta{margin:34px 16px 24px;padding:24px;display:block}.final-btn{width:100%;margin-top:18px}.site-footer{padding:0 16px 28px;display:block}.mobile-download-bar{position:fixed;left:0;right:0;bottom:0;height:60px;background:#244c68;color:#fff;display:flex;align-items:center;justify-content:space-between;padding:8px 12px;z-index:90}.mobile-download-bar span strong,.mobile-download-bar span small{display:block}.mobile-download-bar span small{font-size:10px;color:#c5d4dc}.mobile-download-bar a{background:#fff;color:#244c68;padding:8px 12px;border-radius:6px;font-weight:900}}

/* WPT official brand icon */
.brand-logo{
    display:block;
    width:38px;
    height:38px;
    min-width:38px;
    object-fit:contain;
    flex:0 0 auto;
}

@media(max-width:600px){
    .brand-logo{
        width:34px;
        height:34px;
        min-width:34px;
    }
}