:root{color-scheme:light;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:#1a2944;background:#f6f8fc;font-synthesis:none}
*{box-sizing:border-box}
body{margin:0;min-height:100svh;padding:36px 20px;padding-top:max(36px,env(safe-area-inset-top));padding-bottom:max(28px,env(safe-area-inset-bottom));background:radial-gradient(ellipse at 10% 0,#eaf5ff 0,transparent 52%),radial-gradient(ellipse at 95% 80%,#fff0e8 0,transparent 45%),#f6f8fc}
button,a{-webkit-tap-highlight-color:transparent}
button{font:inherit;cursor:pointer;touch-action:manipulation}
button:focus-visible,a:focus-visible{outline:3px solid #173a79;outline-offset:5px}
.download-card{width:100%;max-width:540px;margin:24px auto;padding:34px;background:#fff;border:1px solid #e4eaf3;border-radius:28px;box-shadow:0 16px 64px #233f7210}
.brand{display:flex;align-items:center;gap:19px}
.app-icon{border-radius:20px;flex:none;box-shadow:0 6px 18px #d5733120}
h1{margin:0;font-size:27px;font-weight:750;letter-spacing:1px}
.intro{margin:35px 0 28px}
.intro h2{margin:0 0 17px;font-size:37px;line-height:1.35;letter-spacing:1px;font-weight:750}
.intro>p{margin:0;font-size:15px;line-height:1.9;color:#5a6880}
.features{display:flex;flex-wrap:wrap;gap:8px;margin:19px 0 0;padding:0;list-style:none}
.features li{padding:7px 10px;background:#f1f6fc;color:#31547b;border-radius:7px;font-size:12px}
.download-section{padding-top:23px;border-top:1px solid #e7edf4}
.version-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:16px;min-height:24px}
.platform-tag{padding:4px 8px;border-radius:5px;background:#eaf7ef;color:#247347;font-size:11px;font-weight:600}
.version-row p{margin:0;color:#5a6880;font-size:13px}
.download-button{display:flex;align-items:center;justify-content:center;gap:18px;width:100%;height:58px;border:0;border-radius:13px;background:#1764cf;color:#fff;font-weight:650;font-size:19px;box-shadow:0 8px 18px #1764cf22}
.download-button:hover{background:#1058bb}
.download-button:active{transform:translateY(1px)}
.download-button:disabled{cursor:wait;background:#b2c4dc;box-shadow:none}
.download-button span{font-size:23px;font-weight:400}
.download-status{min-height:21px;margin:13px 0 8px;text-align:center;font-size:13px;line-height:1.7;color:#5a6880}
.browser-hint{padding:12px 14px;margin:12px 0;background:#fff5e7;border:1px solid #f1ddbd;border-radius:9px;color:#785419;font-size:13px;line-height:1.8}
.requirements{margin:11px 0 0;text-align:center;font-size:12px;line-height:1.8;color:#69758b}
.wechat-group{margin:24px 0 20px;padding-top:22px;border-top:1px solid #e7edf4;text-align:center}
.wechat-group img{display:block;width:min(252px,100%);height:auto;margin:0 auto;background:#fff;-webkit-touch-callout:default}
.wechat-group figcaption{margin-top:14px;font-size:14px;line-height:1.8;color:#53627a}
footer{margin-top:30px;text-align:center;color:#7c879a;font-size:10px;line-height:1.9}
footer a{color:#6a7890;text-underline-offset:3px}
dialog{max-width:400px;width:calc(100% - 40px);padding:29px;border:0;border-radius:20px;color:#1a2944;box-shadow:0 24px 100px #0003}
dialog::backdrop{background:#142439b0}
dialog h2{font-size:22px;margin:5px 0 15px}
dialog p,dialog li{font-size:14px;line-height:1.9;color:#53627a}
dialog ol{margin:14px 0 24px;padding-left:22px}
.guide-arrow{display:block;color:#1764cf;font-size:35px;text-align:right;line-height:1}
.guide-close{width:100%;min-height:46px;border:0;border-radius:10px;background:#1764cf;color:white;font-size:16px}
[hidden]{display:none!important}
@media(max-width:420px){body{padding-left:15px;padding-right:15px}.download-card{margin:10px auto;padding:25px 22px;border-radius:22px}.intro h2{font-size:33px}.brand{gap:15px}.app-icon{width:68px;height:68px;border-radius:17px}h1{font-size:25px}.intro{margin-top:28px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}