:root{--bg:#eff2f8;--ink:#172238;--muted:#718097;--orange:#f16616;--line:#dce3ee;font-family:Inter,"PingFang SC","Microsoft YaHei",sans-serif;font-synthesis:none;-webkit-font-smoothing:antialiased}*{box-sizing:border-box}html,body{width:100%;height:100%;margin:0;overflow:hidden}body{color:var(--ink);background:var(--bg)}a{color:inherit;text-decoration:none}img{display:block}.topbar{position:fixed;z-index:10;top:0;left:0;right:0;height:64px;display:flex;align-items:center;justify-content:space-between;padding:0 max(18px,calc((100vw - 1080px)/2));background:rgba(239,242,248,.92);backdrop-filter:blur(14px);border-bottom:1px solid rgba(220,227,238,.75)}.brand{display:flex;align-items:center;gap:9px;font-size:16px;font-weight:800}.brand img{border-radius:10px}.top-download{padding:9px 15px;border-radius:999px;color:#fff;background:var(--ink);font-size:12px;font-weight:700}.panel{position:relative;display:flex;align-items:center;justify-content:space-between;gap:clamp(25px,8vw,110px);width:100vw;height:100dvh;min-height:540px;padding:84px max(24px,calc((100vw - 1080px)/2)) 64px;background:var(--bg)}.panel-copy{position:relative;z-index:2;max-width:470px}.eyebrow,.step{display:block;margin:0 0 17px;color:var(--orange);font-size:11px;font-weight:800;letter-spacing:.13em}.panel h1,.panel h2{margin:0;font-size:clamp(38px,5.5vw,68px);line-height:1.17;letter-spacing:-.055em}.panel h2{font-size:clamp(32px,4.6vw,56px)}.panel h1 strong,.panel h2 strong{color:var(--orange);font-weight:inherit}.panel-text{max-width:390px;margin:20px 0 0;color:var(--muted);font-size:15px;line-height:1.85}.download-button{display:inline-flex;align-items:center;gap:20px;margin-top:27px;padding:14px 18px 14px 20px;border-radius:11px;color:#fff;background:var(--orange);font-size:13px;font-weight:800;box-shadow:0 10px 22px rgba(241,102,22,.18)}.download-button span{font-size:20px;line-height:1}.support{margin:13px 0 0;color:#9aa6b7;font-size:11px}.intro-icon{width:min(28vw,280px);aspect-ratio:1;display:grid;place-items:center;border:1px solid #cfd8e5;border-radius:50%;background:rgba(255,255,255,.42)}.intro-icon img{width:48%;border-radius:25%;box-shadow:0 18px 32px rgba(24,34,56,.15)}.device-frame{position:relative;width:min(29vw,330px);max-height:calc(100dvh - 130px);margin:0;padding:7px;border-radius:27px;background:var(--ink);box-shadow:0 22px 42px rgba(24,34,56,.18)}.device-frame img{width:100%;height:auto;max-height:calc(100dvh - 144px);object-fit:contain;border-radius:20px}.device-frame figcaption{position:absolute;right:13px;bottom:13px;padding:5px 8px;border-radius:7px;color:#fff;background:rgba(23,34,56,.78);font-size:10px;font-weight:700}.closing-panel{justify-content:center;flex-direction:column;gap:18px;text-align:center}.closing-panel>img{border-radius:13px}.closing-panel h2{font-size:clamp(32px,5vw,58px)}.pager{position:fixed;z-index:12;left:50%;bottom:22px;display:flex;gap:6px;transform:translateX(-50%)}.pager-dot{width:7px;height:7px;padding:0;border:0;border-radius:50%;background:#b9c3d2;cursor:pointer}.pager-dot.is-active{width:21px;border-radius:999px;background:var(--orange)}@media(max-width:700px){.panel{display:block;padding:90px 20px 55px}.panel-copy{max-width:100%}.panel h1{font-size:clamp(39px,11vw,53px)}.panel h2{font-size:34px}.panel-text{margin-top:14px;font-size:13px;line-height:1.75}.intro-icon{width:138px;margin:37px auto 0}.device-frame{width:min(68vw,270px);max-height:calc(100dvh - 310px);margin:29px auto 0;padding:5px;border-radius:22px}.device-frame img{max-height:calc(100dvh - 320px);border-radius:16px}.device-frame figcaption{right:8px;bottom:8px;padding:4px 6px;font-size:9px}.screenshot-panel .panel-copy{padding:0 4px}.pager{bottom:16px}.pager-dot{width:6px;height:6px}.pager-dot.is-active{width:17px}.closing-panel{display:flex;padding:70px 24px}.closing-panel h2{font-size:34px}}
/* Keep tall phone screenshots fully visible inside each fixed panel. */
.device-frame{width:auto;height:min(72dvh,680px);max-width:min(34vw,360px)}
.device-frame img{width:auto;height:100%;max-width:100%;object-fit:contain}
@media(max-width:700px){.device-frame{width:auto;height:calc(100dvh - 300px);max-width:76vw}.device-frame img{height:100%;width:auto;max-width:100%}}

/* Keep legal and operator information accessible on every slide. */
.site-footer{position:fixed;z-index:11;bottom:0;left:0;right:0;display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:4px 14px;padding:8px 16px calc(8px + env(safe-area-inset-bottom));background:rgba(239,242,248,.97);border-top:1px solid var(--line);font-size:11px;line-height:1.5;color:#536279}
.site-footer a{text-decoration:underline;text-underline-offset:3px}
.site-footer a:focus-visible{outline:2px solid var(--orange);outline-offset:3px}
.site-footer .public-security-record{display:inline-flex;align-items:center;gap:5px;white-space:nowrap}
.public-security-record img{width:18px;height:18px;object-fit:contain;flex:none}
.pager{bottom:calc(62px + env(safe-area-inset-bottom))}
@media(max-width:700px){.site-footer{gap:3px 12px;padding-top:6px;font-size:10px}.site-footer span{flex-basis:100%;text-align:center}.pager{bottom:calc(76px + env(safe-area-inset-bottom))}.screenshot-panel .device-frame{height:min(42dvh,360px)}}