*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#f4f7f8;color:#17262b;font-family:Arial,"Microsoft YaHei","PingFang SC",sans-serif;line-height:1.75}a{text-decoration:none;color:inherit}img{display:block;max-width:100%}.skip-link{position:absolute;left:-9999px}.skip-link:focus{left:12px;top:12px;z-index:99;background:#fff;padding:8px 12px}.site-header{position:sticky;top:0;z-index:60;background:rgba(244,247,248,.96);border-bottom:1px solid #d7e0e3;backdrop-filter:blur(9px)}.header-inner{max-width:1200px;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:#183e45;color:#fff;padding:6px 10px;border-radius:6px;font-weight:900}.brand small{font-size:9px;letter-spacing:.12em;color:#6e858b}.desktop-nav{display:flex;gap:22px;font-size:14px;color:#526a70}.header-cta{background:#f06b52;color:#fff;padding:10px 15px;border-radius:6px;font-weight:900}.menu-btn,.mobile-nav{display:none}.hero{max-width:1200px;margin:auto;padding:70px 24px 54px;display:grid;grid-template-columns:1.03fr .97fr;gap:56px;align-items:center}.eyebrow,.section-label,.final-cta p{font-size:11px;letter-spacing:.14em;font-weight:900;color:#d9533d;text-transform:uppercase}.hero h1{font-size:clamp(45px,5.7vw,72px);line-height:1.04;letter-spacing:-.045em;margin:10px 0 20px}.hero-lead{font-size:18px;color:#5a7076}.hero-actions{display:flex;gap:12px;margin:27px 0}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:50px;padding:0 22px;border-radius:7px;font-weight:900}.primary{background:#f06b52;color:#fff}.ghost{background:#fff;border:1px solid #cbd8db}.hero-checks{display:flex;gap:8px;align-items:center;flex-wrap:wrap;font-size:12px}.hero-checks span{background:#e3edef;padding:8px 10px;border-radius:5px;font-weight:800}.hero-checks i{font-style:normal;color:#8aa0a5}.hero-media{position:relative}.main-visual{margin:0;background:#183e45;border-radius:20px;padding:18px}.main-visual img{width:100%;height:320px;object-fit:contain}.device-mini{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:-32px 22px 0;position:relative}.device-mini figure{margin:0;background:#fff;border:1px solid #d4e0e2;border-radius:12px;padding:8px;box-shadow:0 16px 30px rgba(27,55,61,.10)}.device-mini img{height:150px;width:100%;object-fit:contain}.visual-section,.steps-section,.file-guide,.quick-check{max-width:1200px;margin:auto;padding:74px 24px}.section-copy,.steps-intro{max-width:800px}.section-copy h2,.download-head h2,.steps-intro h2,.file-copy h2,.faq-title h2{font-size:clamp(30px,4vw,48px);line-height:1.16;letter-spacing:-.03em;margin:7px 0 14px}.section-copy>p:last-child,.download-head>p:last-child,.steps-intro>p:last-child,.file-copy p,.faq-title>p:last-child{color:#647b80}.visual-grid{display:grid;grid-template-columns:.75fr .75fr 1.5fr;gap:14px;margin-top:28px}.visual-grid figure{margin:0;background:#fff;border:1px solid #d8e2e4;border-radius:14px;overflow:hidden}.visual-grid img{height:250px;width:100%;object-fit:contain;background:#e8eef0}.visual-grid .wide img{object-fit:cover}.visual-grid figcaption{padding:11px 13px;font-size:12px;color:#657a7f}.download-section{background:#173e45;color:#fff;padding:70px max(24px,calc((100vw - 1200px)/2))}.download-head{max-width:800px}.download-head .section-label{color:#ffa48f}.download-head>p:last-child{color:#b8c8cb}.device-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:30px}.device-grid article{background:#214c54;border:1px solid #3c6168;padding:20px;border-radius:9px}.device-grid span{font-size:10px;color:#ffa48f;font-weight:900}.device-grid h3{font-size:20px;margin:10px 0 6px}.device-grid p{font-size:13px;color:#c0d0d3}.device-grid b{display:block;margin-top:20px;border-top:1px solid #436970;padding-top:11px;font-size:11px}.timeline{margin-top:34px}.timeline article{display:grid;grid-template-columns:64px 1fr;gap:22px;padding:21px 0;border-top:1px solid #d3dfe1}.timeline article:last-child{border-bottom:1px solid #d3dfe1}.num{width:46px;height:46px;border-radius:50%;display:grid;place-items:center;background:#f06b52;color:#fff;font-weight:900}.timeline h3{margin:0 0 7px;font-size:21px}.timeline p{margin:0;color:#667d82}.file-guide{display:grid;grid-template-columns:.95fr 1.05fr;gap:50px;align-items:center}.file-image{background:#e5edef;border-radius:18px;padding:14px}.file-image img{height:300px;width:100%;object-fit:contain}.file-copy ul{padding-left:20px;color:#61777c}.quick-check{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;padding-top:16px}.quick-check div{background:#fff;border-top:4px solid #f06b52;padding:18px}.quick-check b,.quick-check span{display:block}.quick-check span{font-size:12px;color:#667b80;margin-top:5px}.faq-section{background:#eef2f3;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 #d7e0e3;border-radius:10px;padding:17px 18px;margin-bottom:9px}.faq-list summary{cursor:pointer;font-weight:900}.faq-list p{color:#667b80;margin-bottom:0}.final-cta{max-width:1200px;margin:54px auto 76px;background:#f06b52;color:#fff;border-radius:14px;padding:34px 38px;display:flex;justify-content:space-between;align-items:center;gap:30px}.final-cta p{color:#ffe0d9;margin:0}.final-cta h2{font-size:30px;margin:4px 0}.final-cta span{color:#ffe2dc}.final-btn{background:#fff;color:#173e45}.site-footer{max-width:1200px;margin:auto;padding:0 24px 34px;display:flex;gap:22px;justify-content:space-between;color:#72868a}.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;background:#fff;border:1px solid #ccd9dc;border-radius:6px;padding:8px}.mobile-nav.open{display:flex}.mobile-nav{gap:15px;flex-wrap:wrap;padding:8px 24px 16px}.hero{grid-template-columns:1fr}.visual-grid{grid-template-columns:1fr 1fr}.visual-grid .wide{grid-column:1/-1}.device-grid{grid-template-columns:1fr 1fr}.file-guide{grid-template-columns:1fr}.quick-check{grid-template-columns:1fr 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 34px;gap:28px}.hero h1{font-size:40px}.hero-lead{font-size:16px}.hero-actions{flex-direction:column}.main-visual img{height:235px}.device-mini img{height:110px}.visual-section,.steps-section,.file-guide,.quick-check{padding-left:16px;padding-right:16px}.visual-grid{grid-template-columns:1fr}.visual-grid .wide{grid-column:auto}.download-section,.faq-section{padding-left:16px;padding-right:16px}.device-grid,.quick-check{grid-template-columns:1fr}.timeline article{grid-template-columns:48px 1fr;gap:12px}.file-image img{height:230px}.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:#173e45;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:#b8c8cb}.mobile-download-bar a{background:#f06b52;color:#fff;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;
    }
}