:root{--gold:#ffb400;--blue:#fff;--green:#111;--bg:#fff;--viewport-height:100dvh}
*{box-sizing:border-box}
[hidden]{display:none!important}
html,body{width:100%;height:100%;margin:0;padding:0}
html{background:#fff}
body{overflow:hidden;color:#111;font-family:"Segoe UI","Microsoft YaHei",Arial,sans-serif;background:#fff}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit}
img{display:block;border:0}
.sr-only{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}
.landing-shell{position:relative;width:100%;height:var(--viewport-height);min-height:480px;display:flex;flex-direction:column;overflow:hidden;background-image:var(--landing-bg,url('/assets/18s/bg-1081.png'));background-position:top center;background-size:cover;background-repeat:no-repeat}
.site-header{position:relative;z-index:10;display:flex;align-items:flex-start;min-height:86px;padding:15px 15px 0}
.site-header>img{width:30%;max-width:120px;height:auto}
.lang-switch{margin-left:auto;display:flex;gap:4px;padding:4px;border-radius:999px;background:rgba(255,255,255,.78);box-shadow:0 4px 18px rgba(0,0,0,.08);backdrop-filter:blur(8px)}
.lang-switch button{min-width:32px;height:30px;padding:0 8px;border:0;border-radius:999px;background:transparent;color:#555;font-size:11px;font-weight:800;cursor:pointer}
.lang-switch button.on{background:#111;color:#fff}
.site-main{flex:1;min-height:0;overflow:hidden;display:flex;flex-direction:column;align-items:center}
.headline-image{flex:0 0 auto;width:80%;max-height:24vh;object-fit:contain}
.carousel{position:relative;width:100%;flex:1;min-height:0;overflow:hidden;touch-action:pan-y}
.carousel-track{width:100%;height:100%;display:flex;transition:transform .45s ease;will-change:transform}
.carousel-slide{display:block;flex:0 0 100%;width:100%;height:100%;overflow:hidden;cursor:pointer;-webkit-tap-highlight-color:transparent}
.carousel-slide img{width:100%;height:100%;object-fit:contain}
.site-footer{flex:0 0 auto;display:flex;flex-direction:column;align-items:center;padding:10px 0 max(10px,env(safe-area-inset-bottom))}
.download-row{width:100%;min-height:100px;display:flex;align-items:center;justify-content:space-around;gap:8px;padding:10px 8px}
.download-image-link{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;max-width:46%;cursor:pointer;-webkit-tap-highlight-color:transparent;transition:transform .12s ease,opacity .12s ease}
.download-image-link:active{transform:scale(.97)}
.download-image-link img{width:auto;height:auto;max-width:180px;max-height:75px}
.download-image-link.download-busy{pointer-events:none;opacity:.72}
.footer-tip{width:80%;height:auto}
.announce{position:fixed;z-index:100;top:0;left:0;right:0;padding:8px 16px;text-align:center;background:#111;color:#fff;font-size:13px}
.contact-button{position:fixed;z-index:90;right:14px;bottom:92px;min-height:44px;display:inline-flex;align-items:center;padding:0 15px;border-radius:999px;background:#111;color:#fff;box-shadow:0 10px 30px rgba(0,0,0,.25);font-size:13px;font-weight:800}
.full-mask{position:fixed;z-index:300;inset:0;display:grid;place-items:center;padding:24px;background:#fff;color:#111}
.full-mask>div{max-width:480px;text-align:center}.full-mask h2{margin:0 0 12px;font-size:30px}.full-mask p{margin:0;color:#666;line-height:1.7}
.modal{position:fixed;z-index:320;inset:0;display:grid;place-items:center;padding:20px;background:rgba(0,0,0,.72);backdrop-filter:blur(8px)}
.modal-card{position:relative;width:min(420px,100%);padding:28px 22px;border-radius:18px;background:#fff;text-align:center;box-shadow:0 24px 80px rgba(0,0,0,.34)}
.modal-card h3{margin:0 32px 10px;font-size:22px}.modal-card p{margin:0;color:#555;font-size:14px;line-height:1.7}
.modal-x{position:absolute;right:10px;top:9px;width:34px;height:34px;border:0;border-radius:10px;background:#f1f1f1;color:#111;font-size:22px;cursor:pointer}
.modal-button{width:100%;margin-top:18px;padding:13px;border:0;border-radius:12px;background:#ffb400;color:#111;font-weight:900;cursor:pointer}
.modal-link{margin-top:12px;border:0;background:transparent;color:#777;cursor:pointer}
@media (min-width:900px){.landing-shell{width:min(750px,100%);margin:0 auto;box-shadow:0 0 70px rgba(0,0,0,.12)}body{background:#f5f5f5}}
@media (max-width:420px){.site-header{min-height:70px;padding-top:12px}.headline-image{width:82%;max-height:21vh}.download-row{min-height:84px;padding-block:7px}.download-image-link img{max-width:100%;max-height:64px}.site-footer{padding-top:4px}.footer-tip{width:84%}}
@media (max-height:620px){.site-header{min-height:58px;padding-top:8px}.site-header>img{max-width:92px}.headline-image{max-height:18vh}.download-row{min-height:72px;padding:4px 8px}.download-image-link img{max-height:56px}.site-footer{padding-top:2px}.footer-tip{max-height:30px;object-fit:contain}}
@media (prefers-reduced-motion:reduce){.carousel-track,.download-image-link{transition:none!important}}