:root{font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif;color:#233048;background:#f4f6fb;font-size:15px;line-height:1.6}*{box-sizing:border-box}[hidden]{display:none!important}body{margin:0}.site-header{background:#fff;border-bottom:1px solid #e2e7f0;padding:19px 4vw;display:flex;align-items:center;justify-content:space-between;gap:12px}.brand{font-weight:800;letter-spacing:-1px;font-size:27px;color:#3355d9}.brand-caption{margin-left:16px;color:#68768e}.environment,.pill{background:#eef2ff;color:#5263a3;border-radius:20px;padding:5px 12px;font-size:12px}.intro{padding:28px 4vw 14px}.intro h1{font-size:28px;margin:0 0 6px}.intro p{margin:0;color:#6c7890}main{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(330px,1fr);gap:24px;padding:10px 4vw 40px;align-items:start}.controls,.timeline{background:white;border:1px solid #e0e6f0;border-radius:16px;min-width:0;box-shadow:0 4px 18px #263f6a05}.controls{padding:24px}.tabs{display:flex;border-bottom:1px solid #e5eaf2;gap:18px;margin-bottom:20px}.tabs button{background:none;color:#718099;border-radius:0;padding:10px 0;border-bottom:3px solid transparent}.tabs button[aria-selected=true]{color:#3457d5;border-bottom-color:#3457d5;font-weight:650}#steps{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:5px;margin:24px 0 20px}#steps button{background:#f5f7fb;color:#7a869c;font-size:11px;padding:9px 3px;border:1px solid transparent}#steps b{display:block;font-size:14px}#steps button[aria-current=step]{background:#edf1ff;border-color:#b7c5ff;color:#2b4bc5}#steps button.complete{color:#287455;background:#eff8f3}.eyebrow{font-size:12px;font-weight:650;color:#5d73b7;letter-spacing:1px}h2{font-size:22px;margin:0 0 10px}h3{font-size:16px;margin:16px 0 8px}.description{color:#69778e;margin:0 0 24px;font-size:14px}.step-page{min-width:0}.step-page+.step-page{margin-top:26px}.step-page:first-of-type{margin-top:0}label{display:block;font-size:14px;font-weight:600;margin:16px 0}input,textarea,select{display:block;width:100%;padding:12px;border:1px solid #ccd5e5;border-radius:8px;margin-top:7px;font:inherit;color:inherit;background:#fff}input:focus,textarea:focus,select:focus{outline:2px solid #b9c8ff;outline-offset:1px}textarea{font-family:monospace}button,.button-link{display:inline-block;border:1px solid transparent;border-radius:8px;background:#3358d8;color:white;font:inherit;font-size:14px;padding:11px 16px;cursor:pointer;text-decoration:none;text-align:center}button:disabled{opacity:.45;cursor:not-allowed}.primary{background:#3358d8;color:#fff}.secondary{background:#fff;border-color:#d4dced;color:#435a88}.text-button{background:none;color:#66748c;padding-left:0;padding-right:0}.danger{color:#ac4141}.text-link{display:inline-block;color:#3457d5;padding:10px;text-decoration:none;font-size:13px}.hint{font-size:12px;line-height:1.8;color:#7a879c}.buttons,.step-footer,.row{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.step-footer{justify-content:space-between;border-top:1px solid #e9edf5;margin-top:25px;padding-top:20px}.row{justify-content:space-between}.row h2,.row h3{margin:0}.notice,#progress,#pending-box,#transaction-recovery{background:#f1f5ff;border:1px solid #dce5ff;padding:12px 15px;border-radius:8px;color:#4e638d;font-size:13px;overflow-wrap:anywhere}#pending-box{background:#fff8e9;color:#805f28}#error{background:#fff0f0;border:1px solid #f2caca;color:#a73535;border-radius:8px;padding:12px;font-size:14px;overflow-wrap:anywhere}#progress:empty,.notice:empty{display:none}.product-card{border:1px solid #e0e6ef;border-radius:10px;padding:18px;margin:12px 0}.product-card h3{margin:0}.product-card p{color:#69788d;font-size:13px}.cart-line{display:flex;align-items:center;gap:8px;flex-wrap:wrap;border-bottom:1px solid #edf0f5;padding:12px 0}.cart-line span{flex:1;min-width:130px}.cart-line input{width:75px;margin:0}.address-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:12px}.summary-list{margin:18px 0}.summary-line{display:flex;justify-content:space-between;gap:16px;padding:10px 0;border-bottom:1px solid #edf0f5;overflow-wrap:anywhere}.summary-line.total{font-weight:700;font-size:19px;border:0;color:#2848b4}#payment-handoff{background:#f0f5ff;border:1px solid #ccd9ff;border-radius:10px;padding:18px;margin-top:18px}#payment-handoff p{font-size:13px;color:#62728c}.timeline{padding:20px;position:sticky;top:16px;max-height:calc(100vh - 32px);overflow:auto}.timeline summary{display:flex;justify-content:space-between;align-items:center;font-weight:650;font-size:18px;cursor:pointer}.timeline ol{list-style:none;padding:0;margin:18px 0 0}.timeline li{border-left:2px solid #d8e2f8;padding:0 0 20px 14px;position:relative}.timeline li:before{content:"";width:7px;height:7px;border-radius:50%;background:#5676d6;position:absolute;left:-4px;top:8px}.timeline li summary{font-size:13px;display:block;font-weight:550}.timeline li small{display:block;color:#8794aa;font-size:11px}.timeline li pre{font-size:11px}.timeline li details{margin:0}details{margin:20px 0}summary{cursor:pointer}pre{white-space:pre-wrap;overflow-wrap:anywhere;background:#f5f7fa;border-radius:7px;padding:12px;max-height:380px;overflow:auto;font-size:12px}#account-panel>.buttons{margin-bottom:18px}.diagnostic #steps,.diagnostic #step-caption{display:none}.diagnostic .step-page{border-bottom:1px solid #dce3ef;padding-bottom:24px;margin-top:25px}#cart-summary{font-size:14px;overflow-wrap:anywhere}@media(max-width:950px){main{grid-template-columns:minmax(0,1fr) minmax(290px,.8fr);gap:14px;padding:10px 20px 30px}.controls{padding:20px}.intro{padding-left:20px;padding-right:20px}}@media(max-width:760px){main{grid-template-columns:1fr;padding:10px 12px 24px}.timeline{position:static;max-height:580px}.controls{padding:18px}.intro{padding:20px 16px 12px}.intro h1{font-size:23px}.site-header{padding:15px 16px}.brand-caption{font-size:13px;margin-left:10px}.environment{font-size:10px;padding:5px 8px}.tabs{gap:20px}#steps{grid-template-columns:repeat(3,1fr);margin-top:12px}.address-grid{grid-template-columns:1fr}.step-footer{align-items:stretch}.step-footer .primary{flex:1}h2{font-size:20px}.row{align-items:flex-start}.button-link{width:100%}.summary-line{font-size:13px}#protocol-panel>summary:after{content:"展开 / 收起";font-weight:400;font-size:11px;margin-left:8px;color:#8794aa}}