:root{--bg: #ffffff;--bg-soft: #f6f8fc;--paper: #ffffff;--ink: #0f172a;--ink-2: #1e293b;--sub: #64748b;--brand: #2f6bed;--brand-dark: #1d54cf;--brand-soft: #eaf1fe;--line: #e6ebf2;--radius: 16px;--shadow-sm: 0 6px 18px rgba(15, 23, 42, .06);--shadow-md: 0 18px 44px rgba(15, 23, 42, .1);--maxw: 1180px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:PingFang SC,Microsoft YaHei,-apple-system,Segoe UI,sans-serif;background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}.page-root{min-height:100vh}.top-nav{position:sticky;top:0;z-index:80;height:66px;background:#ffffffdb;border-bottom:1px solid var(--line);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);display:flex;align-items:center;justify-content:center;gap:clamp(18px,3vw,40px);padding:0 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var(--line);background:#fff;cursor:pointer}.modal-mask{position:fixed;top:0;right:0;bottom:0;left:0;background:#0f172a80;display:grid;place-items:center;z-index:99;padding:20px;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}.modal{width:min(560px,100%);background:#fff;border-radius:18px;border:1px solid var(--line);padding:24px;box-shadow:var(--shadow-md);max-height:90vh;overflow:auto}.modal h3{margin-top:0}.pay-form{display:grid;gap:12px}.pay-form label{display:grid;gap:6px;font-size:13px;color:#475569;font-weight:600}.pay-form input{height:40px;border:1px solid var(--line);border-radius:10px;padding:0 12px;font-size:15px}.pay-form input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft)}.checkout-summary{background:linear-gradient(180deg,#f7faff,#eef4ff);border:1px solid #dce7fb;border-radius:14px;padding:16px 18px;font-size:14px}.checkout-summary .cs-row{display:flex;align-items:baseline;justify-content:space-between;padding:5px 0;color:var(--ink-2)}.checkout-summary .cs-strong{font-weight:800;color:var(--brand-dark)}.checkout-summary .cs-off{color:#e5484d;font-weight:700}.checkout-summary .cs-del{color:#94a3b8;text-decoration:line-through}.checkout-summary .cs-total{display:flex;align-items:baseline;justify-content:space-between;margin-top:8px;padding-top:12px;border-top:1px dashed #cdddf7}.checkout-summary .cs-total span:first-child{font-size:15px;font-weight:700;color:var(--ink)}.checkout-summary .cs-total span:last-child{font-size:24px;font-weight:900;color:var(--brand)}.download-card{max-width:460px;margin:0 auto;background:var(--paper);border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow-md);padding:40px 32px;text-align:center}.dl-winlogo{display:flex;justify-content:center;margin-bottom:14px}.dl-title{font-size:30px;font-weight:800;color:var(--ink)}.dl-version{margin-top:6px;color:var(--brand);font-weight:800;font-size:18px}.dl-btn{display:block;margin-top:24px;background:var(--brand);color:#fff;border-radius:12px;padding:16px 20px;font-size:17px;font-weight:800;transition:background .18s,transform .18s}.dl-btn:hover{background:var(--brand-dark);transform:translateY(-2px)}.dl-arrow{margin-left:6px}.contact-emphasis{margin-top:12px!important;display:inline-block;background:var(--brand-soft);color:var(--brand-dark)!important;border:1px solid #d6e2fb;border-radius:999px;padding:8px 18px;font-size:15px!important;font-weight:700}.contact-reply-note{margin-top:10px;color:var(--brand-dark);font-weight:600}.ghost-link{color:#94a3b8!important;cursor:default}.feed-box{max-width:760px;margin:0 auto;max-height:460px;overflow-y:auto;display:flex;flex-direction:column;gap:14px;padding:6px 6px 6px 0}.feed-item{background:var(--paper);border:1px solid var(--line);border-left:4px solid var(--brand);border-radius:12px;padding:16px 20px;box-shadow:var(--shadow-sm)}.feed-time{font-size:12px;color:#94a3b8;font-weight:700}.feed-title{margin:4px 0 0;font-size:18px}.feed-item .md-content{margin-top:8px}.feed-empty{text-align:center;color:var(--sub);padding:30px}.order-panel{line-height:1.9}.key-box{margin-top:12px;padding:14px;border-radius:12px;border:1px dashed var(--brand);background:var(--brand-soft)}.key-box pre{margin:0 0 8px;white-space:pre-wrap;font-family:Consolas,Monaco,monospace;font-size:13px}.modal-actions{margin-top:16px;display:flex;justify-content:flex-end;gap:8px}.err-text{color:#dc2626;margin:0}@media (max-width: 1100px){.price-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.bulk-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width: 920px){.nav-links{display:none}}@media (max-width: 860px){.feature-row{grid-template-columns:1fr}.feature-row.reverse .feature-text{order:2}.feature-row.reverse .feature-media{order:1}.feature-grid{grid-template-columns:1fr}}@media (max-width: 680px){.price-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.bulk-grid{grid-template-columns:1fr}.logo-text{font-size:19px}}