:root{--dark:#111714;--dark2:#1d281f;--green:#80d145;--line:#d9e3d4;--ink:#233027;--muted:#667367;--paper:#f5faf2;--white:#fff}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#fbfef9;color:var(--ink);font-family:Arial,"Microsoft YaHei","PingFang SC",sans-serif;font-size:16px;line-height:1.8}img{display:block;max-width:100%;height:auto}a{color:inherit}.shell{width:min(1180px,calc(100% - 40px));margin:auto}.skip{position:fixed;top:-60px;left:12px;z-index:999;background:#fff;padding:10px}.skip:focus{top:12px}
.header{position:sticky;top:0;z-index:60;background:rgba(17,23,20,.98);color:#fff}.head-grid{min-height:72px;display:grid;grid-template-columns:180px 150px 1fr auto;gap:22px;align-items:center}.brand{display:inline-flex;padding:6px 8px;background:#0c100d;border:1px solid rgba(255,255,255,.08)}.brand img{height:32px;width:auto;max-width:155px;object-fit:contain}.status span,.status b{display:block}.status span{font-size:8px;color:#94a297;letter-spacing:.14em}.status b{font-size:14px;color:#e8f4ea}.head-grid nav{display:flex;justify-content:center;gap:20px}.head-grid nav a{text-decoration:none;color:#d6e2d7;font-size:13px}.head-cta{display:inline-flex;min-height:44px;align-items:center;justify-content:center;padding:0 18px;background:var(--green);color:#142114;text-decoration:none;font-weight:900;border-radius:999px}
.hero{padding:82px 0;background:linear-gradient(135deg,var(--dark),var(--dark2));color:#fff}.hero-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:56px;align-items:center}.phone-stack span,.section-head>span,.device-copy>span,.file-copy>span,.related-grid>div>span,.faq-grid>div>span{font-size:10px;font-weight:900;letter-spacing:.15em;color:#b9f08f}.phone-stack{display:flex;flex-direction:column;gap:14px;align-items:center}.phone-stack b{font-size:56px;color:#d2edc1}.phone-stack figure{margin:0;padding:18px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.08);border-radius:24px;width:100%}.phone-stack img{max-height:430px;width:auto;margin:auto;object-fit:contain}.eyebrow{font-size:10px;font-weight:900;letter-spacing:.15em;color:#b9f08f}.hero h1,.section-head h2,.device-copy h2,.file-copy h2,.related-grid h2,.faq-grid h2,.final h2{margin:0;font-size:clamp(34px,4.6vw,68px);line-height:.98;letter-spacing:-.04em}.hero p,.device-copy p,.file-copy p{color:#d8e6d7}.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:28px}.primary,.ghost{display:inline-flex;min-height:52px;align-items:center;justify-content:center;padding:10px 20px;border-radius:999px;font-weight:900;text-decoration:none}.primary{background:var(--green);color:#132313}.ghost{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.2)}.badge-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}.badge-row span{padding:8px 14px;border:1px solid rgba(255,255,255,.14);border-radius:999px;color:#d7e6d7;font-size:13px}
.check{padding:86px 0;background:#fff}.section-head{display:grid;grid-template-columns:180px 1fr;gap:24px;margin-bottom:28px}.section-head h2,.device-copy h2,.file-copy h2,.related-grid h2,.faq-grid h2,.final h2{font-size:clamp(30px,3.1vw,44px);line-height:1.13}.check-grid{display:grid;grid-template-columns:repeat(4,1fr);border-top:2px solid var(--dark);border-left:1px solid var(--line)}.check-grid article{padding:24px;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}.check-grid b{color:var(--green);font-size:20px}.check-grid h3{margin:18px 0 8px;font-size:20px}.check-grid p{margin:0;color:var(--muted)}
.device{display:grid;grid-template-columns:1fr 1fr;background:var(--paper)}.device-copy,.device-visual{padding:78px 6vw}.device-copy p{color:#60705f}.list{margin-top:24px;border-top:1px solid var(--line)}.list>div{display:grid;grid-template-columns:42px 1fr;gap:14px;padding:16px 0;border-bottom:1px solid var(--line)}.list b{display:grid;place-items:center;width:42px;height:42px;border-radius:50%;background:#edf7e4;color:#4f8a24}.list p{margin:4px 0 0;color:var(--muted)}.device-copy a{display:inline-flex;margin-top:24px;padding:11px 20px;background:var(--green);color:#152215;text-decoration:none;font-weight:900;border-radius:999px}.device-visual{margin:0}.frame-top{display:flex;justify-content:space-between;padding:0 2px 12px;color:#7f9780;font-size:9px;letter-spacing:.13em}.frame-top b{font-size:20px;color:#4f8a24}.device-visual img{max-height:430px;width:auto;margin:auto;object-fit:contain}
.file{padding:86px 0;background:#fff}.file-grid{display:grid;grid-template-columns:.95fr 1.05fr;gap:48px;align-items:center}.file-visual{margin:0;padding:18px;background:#f5faf2;border:1px solid var(--line);border-radius:24px}.file-visual img{max-height:420px;width:auto;margin:auto;object-fit:contain}.file-copy p{color:var(--muted)}.file-copy ol{list-style:none;margin:26px 0 0;padding:0;border-top:1px solid var(--line)}.file-copy li{display:grid;grid-template-columns:34px 1fr;gap:16px;padding:16px 0;border-bottom:1px solid var(--line)}.file-copy li b{color:#4f8a24}.file-copy li p{margin:4px 0 0}.cta-row{display:flex;gap:14px;flex-wrap:wrap;margin-top:24px}.cta-row a{display:inline-flex;min-height:48px;align-items:center;justify-content:center;padding:10px 18px;background:var(--dark);color:#fff;text-decoration:none;font-weight:900;border-radius:999px}
.shortcut{padding:0 0 74px;background:#fff}.shortcut-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.shortcut-grid a{min-height:120px;display:grid;grid-template-columns:46px 1fr auto;gap:12px;align-items:center;padding:18px 20px;background:#f5faf2;border:1px solid var(--line);border-radius:18px;text-decoration:none}.shortcut-grid small{color:#4f8a24;font-weight:900}.shortcut-grid strong{font-size:18px}.shortcut-grid span{color:#526054;font-weight:900}
.related{padding:82px 0;background:#fff}.related-grid{display:grid;grid-template-columns:.56fr 1.44fr;gap:60px}.related-grid nav{border-top:1px solid var(--line)}.related-grid nav a{min-height:84px;display:grid;grid-template-columns:100px 1fr 20px;gap:18px;align-items:center;border-bottom:1px solid var(--line);text-decoration:none}.related-grid small{color:#5f9d2f;font-size:9px;font-weight:900}.related-grid b{color:#4f8a24}
.faq{padding:86px 0;background:#f7fbf5}.faq-grid{display:grid;grid-template-columns:.58fr 1.42fr;gap:60px}.faq-list{border-top:1px solid var(--line)}.faq-list details{border-bottom:1px solid var(--line)}.faq-list summary{cursor:pointer;list-style:none;padding:20px 2px;font-size:18px;font-weight:900}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary:after{content:"+";float:right;color:#4f8a24}.faq-list details[open] summary:after{content:"−"}.faq-list p{margin:-3px 0 22px;padding:0 2px;color:var(--muted)}
.final{padding:56px 0;background:var(--dark);color:#fff}.final-grid{display:grid;grid-template-columns:110px 1fr auto;gap:28px;align-items:center}.final-grid>span{font-size:10px;font-weight:900;letter-spacing:.14em;color:#bfe9a0}.final p{margin:6px 0 0;color:#d6e4d4}.final a{min-width:200px;min-height:52px;display:inline-flex;align-items:center;justify-content:center;background:var(--green);color:#152215;text-decoration:none;font-weight:900;border-radius:999px}
.footer{padding:50px 0 86px;background:#0d110e;color:#dee5de}.foot-grid{display:grid;grid-template-columns:1fr auto;gap:36px}.foot-grid img{height:31px;width:auto;max-width:155px;object-fit:contain;padding:6px 8px;background:#090b09}.foot-grid p{color:#97a398;font-size:13px}.foot-grid nav{display:flex;gap:18px;flex-wrap:wrap}.foot-grid nav a{color:#dee5de;text-decoration:none;font-size:14px}.mobile-bar{display:none}
@media(max-width:900px){.head-grid{grid-template-columns:1fr auto}.status,.head-grid nav{display:none}.hero-grid,.device,.file-grid,.related-grid,.faq-grid{grid-template-columns:1fr}.section-head{grid-template-columns:1fr}.check-grid,.shortcut-grid{grid-template-columns:1fr 1fr}.final-grid{grid-template-columns:1fr}.final a{width:100%}}
@media(max-width:600px){body{font-size:15px;padding-bottom:60px}.shell{width:min(100% - 28px,1180px)}.head-grid{min-height:64px}.brand img{height:28px}.head-cta{font-size:12px;padding:8px 12px}.hero{padding:56px 0}.hero h1{font-size:clamp(42px,14vw,60px)}.hero-actions{flex-direction:column}.primary,.ghost{width:100%}.phone-stack img,.device-visual img,.file-visual img{max-height:300px}.check,.file,.related,.faq{padding:62px 0}.device-copy,.device-visual{padding:56px 22px}.check-grid,.shortcut-grid{grid-template-columns:1fr}.foot-grid{grid-template-columns:1fr}.mobile-bar{position:fixed;left:0;right:0;bottom:0;display:flex;justify-content:space-between;align-items:center;gap:12px;padding:10px 14px;background:rgba(17,23,20,.96);color:#fff;z-index:70}.mobile-bar a{display:inline-flex;min-width:110px;min-height:42px;align-items:center;justify-content:center;padding:0 14px;background:var(--green);border-radius:999px;color:#152215;text-decoration:none;font-weight:900}}