*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Arial,"Microsoft YaHei","PingFang SC",sans-serif;color:#18201d;background:#f6f7f4;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;z-index:99;background:#fff;padding:8px 12px}.site-header{position:sticky;top:0;z-index:60;background:rgba(246,247,244,.96);border-bottom:1px solid #dde2dc;backdrop-filter:blur(10px)}.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:11px;margin-right:auto}.brand-mark{width:48px;height:34px;display:grid;place-items:center;border-radius:17px;background:#0f352b;color:#d9ff77;font-weight:900}.brand-copy strong,.brand-copy small{display:block}.brand-copy small{font-size:10px;color:#6d7a74;letter-spacing:.08em}.desktop-nav{display:flex;gap:22px;font-size:14px}.desktop-nav a{color:#46524c}.header-cta{background:#0f352b;color:#fff;padding:10px 16px;border-radius:22px;font-weight:800}.menu-btn,.mobile-nav{display:none}.hero{background:linear-gradient(135deg,#eaf3e3 0%,#f7f5ed 58%,#eef3f0 100%);overflow:hidden}.hero-inner{max-width:1200px;margin:auto;padding:70px 24px 58px;display:grid;grid-template-columns:1fr .9fr;gap:64px;align-items:center}.eyebrow,.section-label,.final-cta p{font-size:11px;letter-spacing:.14em;text-transform:uppercase;font-weight:900;color:#35735e}.hero h1{font-size:clamp(46px,6vw,76px);line-height:1.04;letter-spacing:-.045em;margin:10px 0 20px}.hero-lead{font-size:18px;color:#53615b;max-width:680px}.hero-actions{display:flex;gap:12px;margin:28px 0}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:50px;padding:0 22px;border-radius:25px;font-weight:900}.primary{background:#0f352b;color:#fff}.ghost{border:1px solid #b8c7c0;background:rgba(255,255,255,.55)}.device-switch{display:flex;align-items:center;gap:13px;flex-wrap:wrap}.device-switch span{background:#fff;border:1px solid #d9e2dc;padding:10px 14px;border-radius:12px}.device-switch b{color:#0f352b}.device-switch i{font-style:normal;color:#768079}.phone-stage{position:relative;height:500px}.phone{position:absolute;margin:0;background:#111;border-radius:34px;padding:9px;box-shadow:0 30px 60px rgba(18,46,38,.18);overflow:hidden}.phone img{width:100%;height:100%;object-fit:contain;background:#101514;border-radius:27px}.phone-back{width:47%;height:390px;right:2%;top:8px;transform:rotate(5deg)}.phone-front{width:52%;height:420px;left:8%;bottom:18px;z-index:2;transform:rotate(-4deg)}.stage-note{position:absolute;right:0;bottom:0;background:#d9ff77;padding:12px 16px;border-radius:14px;z-index:4}.stage-note strong,.stage-note span{display:block}.stage-note span{font-size:11px;color:#415048}.visual-strip{max-width:1200px;margin:auto;padding:72px 24px}.visual-copy{max-width:760px}.visual-copy h2,.choose-head h2,.context-copy h2,.steps-head h2,.problem-head h2,.faq-intro h2{font-size:clamp(30px,4.2vw,48px);line-height:1.16;letter-spacing:-.03em;margin:7px 0 14px}.visual-copy>p:last-child,.choose-head>p:last-child,.context-copy p,.steps-head>p:last-child,.faq-intro>p:last-child{color:#647069}.visual-grid{display:grid;grid-template-columns:.75fr .75fr 1.5fr;gap:16px;margin-top:28px}.visual-grid figure{margin:0;background:#fff;border:1px solid #dce4df;border-radius:18px;overflow:hidden}.visual-grid img{width:100%;height:260px;object-fit:contain;background:#eef2ef}.visual-grid .landscape img{object-fit:cover}.visual-grid figcaption{padding:12px 14px;font-size:13px;color:#5d6862}.choose-section{background:#0f352b;color:#fff;padding:70px max(24px,calc((100vw - 1200px)/2))}.choose-head{max-width:760px}.choose-head .section-label{color:#d9ff77}.choose-head>p:last-child{color:#bac9c2}.choice-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:30px}.choice{border-radius:20px;padding:28px}.choice.android{background:#d9ff77;color:#173129}.choice.iphone{background:#fff;color:#17231f}.choice-top{display:flex;justify-content:space-between;font-size:11px;font-weight:900;letter-spacing:.1em}.choice h3{font-size:30px;margin:12px 0 6px}.choice ul{padding-left:20px}.choice a{font-weight:900;border-bottom:1px solid currentColor}.context-section{max-width:1200px;margin:auto;padding:78px 24px;display:grid;grid-template-columns:.9fr 1.1fr;gap:55px;align-items:center}.context-media{background:#e9eeea;border-radius:26px;padding:18px}.context-media img{width:100%;height:390px;object-fit:contain}.mini-route{display:flex;gap:9px;align-items:center;flex-wrap:wrap;margin-top:24px}.mini-route span{background:#fff;border:1px solid #dce3df;padding:10px 13px;border-radius:10px;font-weight:800}.mini-route b{color:#35735e}.steps-section{background:#eef3ef;padding:72px max(24px,calc((100vw - 1200px)/2))}.steps-head{max-width:800px}.step-timeline{margin-top:34px;display:grid;grid-template-columns:1fr 1fr;gap:14px}.step-timeline article{background:#fff;border:1px solid #dce4df;border-radius:18px;padding:20px;display:grid;grid-template-columns:42px 1fr;gap:15px}.step-timeline span{width:36px;height:36px;border-radius:50%;display:grid;place-items:center;background:#0f352b;color:#d9ff77;font-weight:900;font-size:11px}.step-timeline h3{margin:0 0 6px;font-size:19px}.step-timeline p{margin:0;color:#657069}.download-problems{max-width:1200px;margin:auto;padding:76px 24px}.problem-head{max-width:760px}.problem-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:28px}.problem-grid article{background:#fff;border-top:4px solid #d9ff77;padding:20px;border-radius:0 0 14px 14px}.problem-grid b{color:#35735e;font-size:11px}.problem-grid h3{margin:7px 0}.problem-grid p{font-size:13px;color:#69736e}.faq-section{background:#17231f;color:#fff;padding:70px max(24px,calc((100vw - 1200px)/2));display:grid;grid-template-columns:.75fr 1.25fr;gap:50px}.faq-intro .section-label{color:#d9ff77}.faq-intro>p:last-child{color:#acbbb4}.faq-list details{background:#20312b;border:1px solid #33483f;border-radius:13px;padding:17px 19px;margin-bottom:10px}.faq-list summary{font-weight:900;cursor:pointer}.faq-list p{color:#c0ccc6;margin-bottom:0}.final-cta{max-width:1200px;margin:55px auto 75px;padding:34px 38px;background:#d9ff77;border-radius:22px;display:flex;justify-content:space-between;align-items:center;gap:28px}.final-cta p{margin:0;color:#35735e}.final-cta h2{font-size:30px;margin:4px 0}.final-cta span{color:#526158}.light{background:#0f352b;color:#fff}.site-footer{max-width:1200px;margin:auto;padding:0 24px 34px;display:grid;grid-template-columns:1fr auto auto;gap:25px;align-items:end;color:#67736d}.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 #c7d2cc;background:#fff;border-radius:10px;padding:8px 11px}.mobile-nav.open{display:flex}.mobile-nav{gap:16px;flex-wrap:wrap;padding:8px 24px 16px}.hero-inner,.context-section{grid-template-columns:1fr}.phone-stage{height:430px}.visual-grid{grid-template-columns:1fr 1fr}.visual-grid .landscape{grid-column:1/-1}.choice-grid,.step-timeline{grid-template-columns:1fr}.problem-grid{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-copy small{display:none}.hero-inner{padding:46px 16px 34px;gap:20px}.hero h1{font-size:42px}.hero-lead{font-size:16px}.hero-actions{flex-direction:column}.phone-stage{height:340px}.phone-back{height:275px}.phone-front{height:295px}.visual-strip,.context-section,.download-problems{padding-left:16px;padding-right:16px}.visual-grid{grid-template-columns:1fr}.visual-grid .landscape{grid-column:auto}.visual-grid img{height:230px}.choose-section,.steps-section,.faq-section{padding-left:16px;padding-right:16px}.choice{padding:22px}.context-media img{height:260px}.problem-grid{grid-template-columns:1fr}.final-cta{margin:34px 16px 24px;padding:24px;display:block}.final-cta .btn{width:100%;margin-top:18px}.site-footer{padding:0 16px 28px;grid-template-columns:1fr}.mobile-download-bar{position:fixed;left:0;right:0;bottom:0;height:60px;background:#0f352b;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:#b6c6bf}.mobile-download-bar a{background:#d9ff77;color:#173129;padding:8px 12px;border-radius:18px;font-weight:900}}

.mobile-content-band{max-width:1200px;margin:auto;padding:12px 24px 74px;display:grid;grid-template-columns:1.1fr .9fr;gap:46px;align-items:center}.mobile-content-band h2{font-size:clamp(28px,3.6vw,43px);line-height:1.16;letter-spacing:-.025em;margin:7px 0 13px}.mobile-content-band p:last-child{color:#647069}.mobile-content-band figure{margin:0;background:#fff;border:1px solid #dce4df;border-radius:18px;padding:12px}.mobile-content-band img{height:220px;width:100%;object-fit:contain}.mobile-content-band figcaption{font-size:12px;color:#657069;padding:8px 4px 2px}
@media(max-width:900px){.mobile-content-band{grid-template-columns:1fr}}
@media(max-width:600px){.mobile-content-band{padding-left:16px;padding-right:16px}}

/* 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;
    }
}