:root{--a1:#D4AF37;--a2:#4A90D9;--fg:#F5F0E0;--fg2:#8A8070;}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{font-family:-apple-system,"PingFang SC","Microsoft YaHei","Segoe UI",sans-serif;line-height:1.6;overflow-x:hidden;}
a{text-decoration:none;color:inherit;}
img{max-width:100%;height:auto;display:block;}
.container{max-width:1200px;margin:0 auto;padding:0 clamp(16px,3vw,24px);}
body{background:#050505;color:#F5F0E0;}
.nav{position:sticky;top:0;z-index:50;background:#050505E6;backdrop-filter:blur(12px);border-bottom:1px solid #222222;}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px;}
.logo{font-weight:700;font-size:16px;color:#F5F0E0;text-decoration:none;display:flex;align-items:center;gap:10px;}
.logo img{height:28px;filter:brightness(0) invert(1);}.nav-links{display:flex;gap:24px;}.nav-links a{color:#8A8070;text-decoration:none;font-size:14px;transition:color .2s;}.nav-links a:hover{color:#D4AF37;}.nav-cta{padding:8px 20px;background:linear-gradient(135deg,#D4AF37,#4A90D9);border-radius:6px;color:#fff;font-weight:600;font-size:14px;text-decoration:none;}
.hero{padding:clamp(60px,8vw,120px) 0 clamp(40px,5vw,80px);text-align:center;position:relative;overflow:hidden;}
.hero::before{content:"";position:absolute;top:50%;left:50%;width:600px;height:600px;transform:translate(-50%,-50%);background:radial-gradient(circle,#D4AF3720,transparent 60%);border-radius:50%;pointer-events:none;}
.hero-inner{position:relative;z-index:1;}
.hero h1{font-size:clamp(30px,5vw,56px);font-weight:800;line-height:1.1;margin-bottom:18px;background:linear-gradient(135deg,#D4AF37,#4A90D9);-webkit-background-clip:text;-webkit-text-fill-color:transparent;}
.hero p{font-size:clamp(14px,1.5vw,17px);color:#8A8070;max-width:540px;margin:0 auto 28px;}
.hero .kpi-row{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;}
.hero .kpi{padding:14px 20px;background:rgba(255,255,255,.05);border:1px solid #222222;border-radius:10px;backdrop-filter:blur(8px);}
.hero .kpi .num{font-size:20px;font-weight:700;color:#D4AF37;}
.hero .kpi .lbl{font-size:11px;color:#8A8070;}
.strip{background:transparent;padding:14px 0;}
.strip-grid{display:flex;gap:10px;overflow-x:auto;padding-bottom:4px;}
.strip-item{flex:0 0 auto;display:flex;align-items:center;gap:12px;padding:8px 18px;background:#0D0D0D;border:1px solid #222222;border-radius:100px;white-space:nowrap;}
.s-name{font-size:12px;color:#8A8070;}
.s-price{font-family:"SF Mono",Consolas,monospace;font-size:14px;font-weight:600;}
.s-chg{font-size:11px;color:#4A90D9;}
.features{padding:clamp(60px,7vw,100px) 0;}
.features h2{font-size:clamp(22px,3vw,34px);font-weight:700;text-align:center;margin-bottom:40px;}
.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px;}
.feature-card{padding:28px;background:#0D0D0D;border:1px solid #222222;border-radius:10px;}
.feature-card .f-ic{width:44px;height:44px;margin-bottom:14px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#D4AF3720,#4A90D920);border-radius:12px;font-size:22px;}
.feature-card h3{font-size:16px;font-weight:600;margin-bottom:6px;color:#F5F0E0;}
.feature-card p{font-size:13px;color:#8A8070;line-height:1.7;}
.download{padding:clamp(60px,8vw,100px) 0;}
.download h2{font-size:clamp(22px,3vw,34px);font-weight:700;text-align:center;margin-bottom:8px;}
.download .sub{text-align:center;color:#8A8070;margin-bottom:40px;font-size:14px;}
.dl-grid{display:flex;flex-direction:column;gap:10px;max-width:400px;margin:0 auto;}.dl-btn-row:not([hidden]){display:flex;align-items:center;gap:14px;padding:16px 24px;background:#0D0D0D;border:1px solid #222222;border-radius:10px;text-decoration:none;color:inherit;}
.dl-btn-row .dl-ic{font-size:22px;}
.dl-btn-row h3{font-size:14px;font-weight:600;}
.dl-btn-row .dl-sub{font-size:11px;color:#8A8070;}
.dl-btn-row .arrow{margin-left:auto;color:#D4AF37;font-size:18px;}
.faq{padding:clamp(60px,7vw,80px) 0;}
.faq h2{font-size:clamp(22px,3vw,30px);font-weight:700;text-align:center;margin-bottom:40px;}
.faq-item{border-bottom:1px solid #222222;padding:16px 0;}
.faq-item summary{cursor:pointer;font-weight:600;font-size:15px;list-style:none;display:flex;justify-content:space-between;align-items:center;color:#F5F0E0;}
.faq-item summary::after{content:"+";color:#D4AF37;font-size:18px;font-family:"SF Mono",Consolas,monospace;}
.faq-item[open] summary::after{content:"−";}
.faq-item p{margin-top:12px;color:#8A8070;font-size:13px;line-height:1.7;}
.ft{background:#000;color:#888;padding:40px 0 20px;text-align:center;font-size:13px;}
.ft img{height:24px;margin-bottom:14px;opacity:.4;}
/* === 图片大小约束 === */
img{max-width:100%;height:auto;display:block;}
.hero-banner img{max-height:420px;width:100%;object-fit:contain;border-radius:10px;}
.screen-grid img{max-height:480px;width:auto;object-fit:contain;margin:0 auto;border-radius:10px;}
.logo img,.ft img{max-height:28px;width:auto;}
@media(max-width:768px){.hero-banner img{max-height:260px;}.screen-grid img{max-height:360px;}.nav-links{display:none;}}
a.dl-card{color:inherit;text-decoration:none}