:root{--background:#f5f5f7;--surface:#fff;--surface-soft:#fbfbfd;--text:#1d1d1f;--muted:#6e6e73;--line:#d2d2d7;--accent:#06c;--accent-hover:#0055b3;--success:#16803c;--danger:#b42318;--shadow:0 18px 50px #00000014;--radius-lg:28px;--radius-md:18px;--radius-sm:12px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:var(--background);color:var(--text);-webkit-font-smoothing:antialiased;margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}a{color:inherit;text-decoration:none}button,input,textarea{font:inherit}.site-header{z-index:20;-webkit-backdrop-filter:saturate(180%)blur(18px);backdrop-filter:saturate(180%)blur(18px);background:#ffffffe0;border-bottom:1px solid #d2d2d7b8;position:sticky;top:0}.header-inner,.footer-inner,.page-shell{width:min(1120px,100% - 40px);margin:0 auto}.header-inner{justify-content:space-between;align-items:center;gap:24px;min-height:64px;display:flex}.brand{letter-spacing:-.02em;align-items:center;gap:10px;font-size:18px;font-weight:700;display:inline-flex}.brand-mark{background:var(--text);color:#fff;border-radius:9px;place-items:center;width:30px;height:30px;font-size:14px;display:grid}.nav-links{color:#424245;align-items:center;gap:24px;font-size:14px;display:flex}.nav-links a:hover,.footer-links a:hover{color:var(--accent)}.page-shell{min-height:calc(100vh - 210px)}.hero{text-align:center;padding:96px 0 72px}.eyebrow{color:var(--accent);letter-spacing:.08em;text-transform:uppercase;margin:0 0 14px;font-size:14px;font-weight:700}.hero h1,.page-heading h1{letter-spacing:-.06em;margin:0;font-size:clamp(44px,8vw,82px);line-height:.98}.hero-copy,.page-heading p{max-width:720px;color:var(--muted);margin:26px auto 0;font-size:clamp(18px,2.2vw,23px);line-height:1.5}.hero-actions{flex-wrap:wrap;justify-content:center;gap:14px;margin-top:34px;display:flex}.button{cursor:pointer;border:1px solid #0000;border-radius:999px;justify-content:center;align-items:center;gap:8px;min-height:48px;padding:0 22px;font-weight:650;transition:transform .16s,background .16s,border-color .16s;display:inline-flex}.button:hover{transform:translateY(-1px)}.button-primary{background:var(--accent);color:#fff}.button-primary:hover{background:var(--accent-hover)}.button-secondary{border-color:var(--line);background:var(--surface)}.button-secondary:hover{border-color:#a1a1a6}.button:disabled{opacity:.55;cursor:wait;transform:none}.feature-panel{border-radius:var(--radius-lg);color:#fff;box-shadow:var(--shadow);background:linear-gradient(145deg,#111318,#2a2d34);overflow:hidden}.feature-panel-inner{grid-template-columns:1.1fr .9fr;align-items:center;gap:48px;min-height:460px;padding:clamp(36px,7vw,76px);display:grid}.feature-panel h2,.section-title{letter-spacing:-.045em;margin:0;font-size:clamp(34px,5vw,56px);line-height:1.04}.feature-panel p{color:#c7c7cc;max-width:570px;margin:22px 0 0;font-size:18px;line-height:1.6}.serial-visual{background:#ffffff14;border:1px solid #ffffff26;border-radius:24px;flex-direction:column;justify-content:space-between;min-height:250px;padding:28px;display:flex;box-shadow:inset 0 1px #ffffff24}.serial-label{color:#a1a1a6;text-transform:uppercase;letter-spacing:.12em;font-size:13px}.serial-code{letter-spacing:.08em;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:clamp(20px,3vw,30px)}.status-chip{color:#8df0b3;background:#2ecc7129;border-radius:999px;width:fit-content;padding:8px 12px;font-size:13px;font-weight:700}.section{padding:88px 0}.section-heading{max-width:720px;margin-bottom:34px}.section-heading p{color:var(--muted);margin:16px 0 0;font-size:18px;line-height:1.55}.card-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;display:grid}.info-card{border-radius:var(--radius-md);background:var(--surface);border:1px solid #d2d2d7b3;min-height:220px;padding:30px}.info-card-number{color:var(--accent);letter-spacing:.08em;margin-bottom:50px;font-size:13px;font-weight:750}.info-card h3{letter-spacing:-.025em;margin:0;font-size:22px}.info-card p{color:var(--muted);margin:12px 0 0;line-height:1.6}.page-heading{text-align:center;padding:72px 0 40px}.page-heading h1{font-size:clamp(40px,7vw,68px)}.check-card,.content-card{border-radius:var(--radius-lg);background:var(--surface);max-width:760px;box-shadow:var(--shadow);border:1px solid #d2d2d7bf;margin:0 auto 88px;padding:clamp(26px,5vw,48px)}.form-label{margin-bottom:10px;font-size:14px;font-weight:700;display:block}.form-row{grid-template-columns:1fr auto;gap:12px;display:grid}.text-input,.text-area{border:1px solid var(--line);width:100%;color:var(--text);background:#fff;border-radius:14px;outline:none;transition:border-color .16s,box-shadow .16s}.text-input{text-transform:uppercase;letter-spacing:.035em;min-height:54px;padding:0 16px}.text-area{resize:vertical;min-height:140px;padding:14px 16px}.text-input:focus,.text-area:focus{border-color:var(--accent);box-shadow:0 0 0 4px #0066cc1f}.form-help{color:var(--muted);margin:12px 0 0;font-size:13px;line-height:1.55}.result-card{border-radius:var(--radius-md);background:var(--surface-soft);border:1px solid var(--line);margin-top:28px;padding:24px}.result-card.success{background:#f3fbf5;border-color:#16803c59}.result-card.error{background:#fff7f6;border-color:#b423184d}.result-title{letter-spacing:-.025em;margin:0;font-size:22px}.result-message{color:var(--muted);margin:10px 0 0;line-height:1.55}.detail-list{gap:0;margin:22px 0 0;display:grid}.detail-row{border-top:1px solid #d2d2d7bf;grid-template-columns:150px 1fr;gap:20px;padding:14px 0;display:grid}.detail-row dt{color:var(--muted)}.detail-row dd{margin:0;font-weight:650}.link-list{gap:14px;margin-top:26px;display:grid}.link-tile{border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--surface-soft);justify-content:space-between;align-items:center;gap:20px;padding:20px;display:flex}.link-tile strong{margin-bottom:5px;display:block}.link-tile span{color:var(--muted);font-size:14px}.site-footer{background:var(--surface-soft);border-top:1px solid #d2d2d7bf;padding:38px 0}.footer-inner{color:var(--muted);justify-content:space-between;align-items:center;gap:24px;font-size:13px;display:flex}.footer-links{flex-wrap:wrap;gap:18px;display:flex}@media (max-width:760px){.header-inner,.footer-inner,.page-shell{width:min(100% - 28px,1120px)}.header-inner{min-height:58px}.nav-links{gap:14px;font-size:13px}.nav-links a:nth-child(3),.nav-links a:nth-child(4){display:none}.hero{padding:72px 0 54px}.feature-panel-inner{grid-template-columns:1fr;min-height:auto}.card-grid{grid-template-columns:1fr}.section{padding:64px 0}.form-row{grid-template-columns:1fr}.form-row .button{width:100%}.detail-row{grid-template-columns:1fr;gap:6px}.footer-inner{flex-direction:column;align-items:flex-start}}