:root{color-scheme:dark;font-family:Inter,SF Pro Display,Segoe UI,PingFang SC,sans-serif;--bg: #07090d;--panel: rgba(15, 18, 25, .9);--line: rgba(255,255,255,.09);--muted: #8d95a6;--text: #f4f6fa;--green: #7df4c3;--cyan: #75cfff;--danger: #ff7584}*{box-sizing:border-box}body{margin:0;min-height:100vh;color:var(--text);background:radial-gradient(circle at 18% 10%,rgba(30,96,119,.2),transparent 34rem),radial-gradient(circle at 88% 76%,rgba(18,102,78,.16),transparent 30rem),var(--bg);overflow-x:hidden}button,input,textarea{font:inherit}button,a{-webkit-tap-highlight-color:transparent}.hidden{display:none!important}.ambient{position:fixed;width:22rem;height:22rem;border-radius:50%;filter:blur(100px);opacity:.16;pointer-events:none}.ambient-a{left:-9rem;top:28%;background:#48bde6}.ambient-b{right:-10rem;bottom:-8rem;background:#41e4a3}.topbar{height:76px;max-width:1220px;margin:0 auto;padding:0 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330px;gap:20px;align-items:stretch}.checkout-card,.trust-panel{border:1px solid var(--line);background:linear-gradient(155deg,#13171ff5,#0a0c11e6);box-shadow:0 30px 80px #00000057;border-radius:24px}.checkout-card{min-height:670px;padding:42px 46px}.trust-panel{padding:42px 32px;background:linear-gradient(160deg,#0e2121d1,#0a0d12f0 48%)}.stepper{display:flex;align-items:center;gap:12px;margin-bottom:42px}.stepper i{height:1px;background:var(--line);flex:1}.step{display:flex;align-items:center;gap:9px;color:#676f7e}.step span{width:26px;height:26px;border-radius:50%;display:grid;place-items:center;border:1px solid #3a404d;font-size:12px}.step em{font-style:normal;font-size:12px;white-space:nowrap}.step.active{color:var(--text)}.step.active 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p{color:var(--muted);font-size:11px;line-height:1.55;margin:7px 0 0}.trust-footer{margin-top:45px;padding-top:22px;border-top:1px solid var(--line);display:flex;align-items:center;gap:12px}.shield{width:38px;height:38px;border-radius:12px;display:grid;place-items:center;color:var(--green);background:#7df4c314}.trust-footer p{display:flex;flex-direction:column;margin:0;font-size:11px}.trust-footer small{color:var(--muted);margin-top:4px}.toast{position:fixed;left:50%;bottom:26px;transform:translate(-50%,20px);opacity:0;pointer-events:none;color:#07100d;background:#e9fff6;padding:10px 15px;border-radius:10px;font-size:12px;font-weight:650;transition:.25s;z-index:20}.toast.show{opacity:1;transform:translate(-50%)}.pkg-detail{border:1px solid var(--line);border-radius:15px;background:#ffffff06;padding:16px 18px;margin-bottom:19px}.pkg-detail-head{color:#c8ced9;font-size:12px;margin-bottom:10px}.pkg-detail ol{margin:0 0 14px;padding-left:20px;color:var(--text);font-size:13px;line-height:1.9}.pkg-detail ol li::marker{color:var(--green)}.pkg-money{border-top:1px dashed var(--line);padding-top:6px}.pkg-money>div{display:flex;justify-content:space-between;gap:20px;padding:7px 0;font-size:12px}.pkg-money span{color:var(--muted)}.pkg-money strong{color:var(--green)}.reg-error,.agreement-final{color:var(--danger);font-size:12px;padding:10px 13px;border:1px solid rgba(255,117,132,.3);background:#ff758412;border-radius:11px;margin:0 0 16px}.agreement-summary{border:1px solid var(--line);border-radius:16px;background:#ffffff06;padding:18px 20px;margin-bottom:22px}.agreement-highlight{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:14px}.agreement-highlight>div{border:1px solid var(--line);border-radius:13px;padding:13px 15px;display:flex;flex-direction:column;gap:7px;background:#7df4c30a}.agreement-highlight span{color:var(--muted);font-size:11px}.agreement-highlight strong{color:var(--green);font-size:20px}.agreement-rows>div{display:flex;justify-content:space-between;gap:18px;padding:10px 0;border-bottom:1px solid var(--line);font-size:12px}.agreement-rows>div:last-child{border-bottom:0}.agreement-rows span{color:var(--muted)}.agreement-rows strong{text-align:right}.agreement-rows small{display:block;color:var(--muted);margin-top:5px;font-size:11px;line-height:1.6}.agreement-final{color:#ffd98a;border-color:#ffd98a4d;background:#ffd98a0f;margin:14px 0 0;line-height:1.7}.agreement-extra{color:var(--muted);font-size:11px;line-height:1.7;margin:12px 0 0;white-space:pre-wrap}.usdt-qr-wrap{display:flex;flex-direction:column;align-items:center;gap:9px;margin:4px 0 18px}.usdt-qr{padding:10px;border-radius:16px;cursor:pointer;line-height:0;background:#fff;border:1px solid rgba(255,255,255,.2);box-shadow:0 14px 44px #0006,0 0 0 6px #ffffff08;transition:transform .18s}.usdt-qr:hover{transform:translateY(-2px)}.usdt-qr canvas{border-radius:8px;display:block}.usdt-qr-hint{color:var(--muted);font-size:11px}.redeem-row{display:grid;grid-template-columns:1fr max-content;gap:10px}.redeem-row .button{min-height:46px;padding:0 22px}.redeem-row input{text-transform:uppercase}#redeem-hint{color:var(--green)}#redeem-hint.redeem-bad{color:var(--danger)}#summary-discount{color:var(--green)}.usdt-amount-card{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:20px}.usdt-amount-card>div{border:1px solid var(--line);border-radius:13px;padding:13px 15px;display:flex;flex-direction:column;gap:7px;background:#7df4c30a}.usdt-amount-card span{color:var(--muted);font-size:11px}.usdt-amount-card strong{color:var(--green);font-size:18px;word-break:break-all}.usdt-address{width:100%;min-height:52px;text-align:left;color:var(--text);background:#ffffff09;border:1px dashed rgba(125,244,195,.4);border-radius:12px;padding:12px 14px;cursor:pointer;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:14px;word-break:break-all;transition:border-color .2s}.usdt-address:hover{border-color:var(--green)}.usdt-status{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:13px;margin:16px 0}.usdt-status.paid{color:var(--green)}.usdt-status.abnormal{color:#ffd98a}.usdt-status .spinner{width:18px;height:18px;border-width:2px}@media(max-width:900px){.layout{grid-template-columns:1fr;margin-top:6px}.trust-panel{display:none}}@media(max-width:620px){.topbar{height:66px;padding:0 17px}.secure-badge{display:none}.layout{padding:0 10px;margin-bottom:20px}.checkout-card{padding:26px 18px;border-radius:18px;min-height:calc(100vh - 84px)}.step em{display:none}.stepper{margin-bottom:30px}.product{grid-template-columns:80px 1fr;gap:14px}.product-image{width:80px;height:76px}.sku-grid,.contact-grid{grid-template-columns:1fr}.section-title{align-items:center}.section-title h1{font-size:23px}.agreement-highlight{grid-template-columns:1fr}}