:root{--bg:#fafaf9;--bg-elevated:#fff;--fg:#18181b;--fg-muted:#71717a;--border:#f4f4f5;--accent:#6366f1;--accent-hover:#4f46e5;--accent-light:#eef2ff;--success:#10b981;--warning:#f59e0b;--danger:#ef4444;--radius-sm:8px;--radius:12px;--radius-lg:16px;--radius-xl:24px;--shadow-sm:0 1px 2px #0000000a;--shadow:0 4px 12px #0000000d;--shadow-lg:0 12px 32px #00000014;--shadow-accent:0 8px 24px #6366f126}*{box-sizing:border-box;margin:0;padding:0}html,body{background:var(--bg);color:var(--fg);-webkit-font-smoothing:antialiased;min-height:100vh;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;font-size:16px;line-height:1.6}a{color:inherit;text-decoration:none}button{cursor:pointer;font-family:inherit}input,textarea{font-family:inherit}.site-header{z-index:50;-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border);background:#fafaf9d9;position:sticky;top:0}.header-inner{justify-content:space-between;align-items:center;max-width:1100px;margin:0 auto;padding:16px 24px;display:flex}.logo{color:var(--fg);letter-spacing:-.5px;align-items:center;gap:8px;font-size:22px;font-weight:800;display:flex}.logo-icon{font-size:24px}.logo-accent{color:var(--accent)}.header-nav a{color:var(--fg-muted);font-size:15px;font-weight:500;transition:color .15s}.header-nav a:hover{color:var(--accent)}.site-footer{border-top:1px solid var(--border);text-align:center;color:var(--fg-muted);margin-top:80px;padding:40px 24px;font-size:14px}.footer-inner{max-width:1100px;margin:0 auto}.home-wrap{max-width:1100px;margin:0 auto;padding:80px 24px 40px}.home-hero{text-align:center;margin-bottom:64px}.home-hero h1{letter-spacing:-1.5px;color:var(--fg);background:linear-gradient(135deg, var(--fg) 0%, var(--accent) 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;margin-bottom:20px;font-size:52px;font-weight:800;line-height:1.1}.home-hero p{color:var(--fg-muted);max-width:560px;margin:0 auto 36px;font-size:19px;line-height:1.5}.home-search{max-width:560px;margin:0 auto;position:relative}.home-search input{border:2px solid var(--border);border-radius:var(--radius-lg);background:var(--bg-elevated);width:100%;color:var(--fg);box-shadow:var(--shadow-sm);outline:none;padding:18px 24px;font-size:16px;transition:all .2s}.home-search input::placeholder{color:#a1a1aa}.home-search input:focus{border-color:var(--accent);box-shadow:var(--shadow-accent)}.home-empty{text-align:center;color:var(--fg-muted);padding:80px 24px}.home-empty p:first-child{margin-bottom:8px;font-size:20px}.home-category{margin-bottom:56px}.home-category h2{color:var(--fg);letter-spacing:-.3px;align-items:center;gap:10px;margin-bottom:20px;font-size:22px;font-weight:700;display:flex}.home-grid{grid-template-columns:repeat(3,1fr);gap:16px;display:grid}@media (max-width:900px){.home-grid{grid-template-columns:repeat(2,1fr)}.home-hero h1{font-size:40px}}@media (max-width:600px){.home-grid{grid-template-columns:1fr}.home-wrap{padding:40px 16px}.home-hero h1{font-size:32px}}.home-card{background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius-lg);color:inherit;box-shadow:var(--shadow-sm);cursor:pointer;padding:24px;text-decoration:none;transition:all .2s cubic-bezier(.4,0,.2,1);display:block}.home-card:hover{border-color:var(--accent);box-shadow:var(--shadow-lg);transform:translateY(-4px)}.home-card-icon{background:var(--accent-light);border-radius:var(--radius);justify-content:center;align-items:center;width:52px;height:52px;margin-bottom:16px;font-size:26px;transition:all .2s;display:inline-flex}.home-card:hover .home-card-icon{background:var(--accent);transform:scale(1.05)}.home-card-title{color:var(--fg);letter-spacing:-.2px;margin-bottom:8px;font-size:17px;font-weight:600}.home-card-desc{color:var(--fg-muted);margin:0;font-size:14px;line-height:1.5}.calc-page{max-width:760px;margin:0 auto;padding:40px 24px 80px}.breadcrumbs{color:var(--fg-muted);align-items:center;gap:8px;margin-bottom:24px;font-size:14px;display:flex}.breadcrumbs a{color:var(--accent);transition:color .15s}.breadcrumbs a:hover{color:var(--accent-hover)}.calc-page h1{color:var(--fg);letter-spacing:-1px;margin-bottom:16px;font-size:40px;font-weight:800;line-height:1.15}.calc-page .lead{color:var(--fg-muted);margin-bottom:36px;font-size:18px;line-height:1.5}.form-card{background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);margin-bottom:32px;padding:32px}.form-label{color:var(--fg);margin-bottom:10px;font-size:14px;font-weight:600;display:block}.form-field{margin-bottom:20px}.form-input{border:2px solid var(--border);border-radius:var(--radius);background:var(--bg);width:100%;color:var(--fg);outline:none;padding:14px 18px;font-size:16px;transition:all .15s}.form-input:focus{border-color:var(--accent);background:var(--bg-elevated);box-shadow:0 0 0 4px var(--accent-light)}.form-input::placeholder{color:#a1a1aa}.btn-group{grid-template-columns:1fr 1fr;gap:8px;margin-bottom:24px;display:grid}.btn-toggle{border:2px solid var(--border);background:var(--bg-elevated);color:var(--fg);border-radius:var(--radius);cursor:pointer;padding:14px 18px;font-size:15px;font-weight:600;transition:all .15s}.btn-toggle:hover{border-color:var(--fg-muted)}.btn-toggle.active{border-color:var(--accent);background:var(--accent-light);color:var(--accent)}.btn-row{flex-wrap:wrap;gap:12px;margin-top:24px;display:flex}.btn-primary{color:#fff;background:var(--accent);border-radius:var(--radius);cursor:pointer;box-shadow:var(--shadow-accent);border:none;flex:200px;padding:16px 28px;font-size:16px;font-weight:600;transition:all .15s}.btn-primary:hover{background:var(--accent-hover);transform:translateY(-1px);box-shadow:0 12px 28px #6366f140}.btn-secondary{color:var(--fg);background:var(--bg-elevated);border:2px solid var(--border);border-radius:var(--radius);cursor:pointer;padding:16px 28px;font-size:16px;font-weight:600;transition:all .15s}.btn-secondary:hover{border-color:var(--fg-muted)}.form-error{color:#991b1b;border-radius:var(--radius);background:#fef2f2;border:1px solid #fecaca;margin-bottom:16px;padding:14px 18px;font-size:14px;font-weight:500}.result-card{background:var(--bg-elevated);border-radius:var(--radius-lg);box-shadow:var(--shadow);margin-bottom:24px;padding:32px}.result-label{color:var(--fg-muted);margin-bottom:8px;font-size:14px;font-weight:500}.result-value{letter-spacing:-2px;margin-bottom:8px;font-size:56px;font-weight:800;line-height:1}.result-category{margin-bottom:12px;font-size:22px;font-weight:700}.result-advice{color:var(--fg-muted);font-size:16px}.stat-grid{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin-bottom:40px;display:grid}.stat-card{background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px;transition:all .15s}.stat-card:hover{box-shadow:var(--shadow)}.stat-label{color:var(--fg-muted);margin-bottom:8px;font-size:13px;font-weight:500}.stat-value{color:var(--fg);letter-spacing:-.5px;font-size:24px;font-weight:700}.stat-hint{color:var(--fg-muted);margin-top:6px;font-size:12px}.info-box{background:var(--accent-light);border-radius:var(--radius);color:#3730a3;border:1px solid #c7d2fe;margin-bottom:32px;padding:18px 22px;font-size:15px}.warning-box{border-radius:var(--radius);color:#78350f;background:#fffbeb;border:1px solid #fcd34d;margin-top:40px;padding:18px 22px;font-size:14px}.section-title{color:var(--fg);letter-spacing:-.5px;margin-top:48px;margin-bottom:16px;font-size:26px;font-weight:700}.calc-page p{color:#3f3f46;margin-bottom:16px;line-height:1.7}.formula-box{background:var(--bg-elevated);border-radius:var(--radius);border:1px solid var(--border);color:var(--fg);margin-bottom:16px;padding:20px 24px;font-family:SF Mono,Consolas,Courier New,monospace;font-size:15px;overflow-x:auto}.table-wrap{border-radius:var(--radius);border:1px solid var(--border);margin-bottom:24px;overflow-x:auto}.data-table{border-collapse:collapse;background:var(--bg-elevated);width:100%;font-size:15px}.data-table th{text-align:left;border-bottom:2px solid var(--border);background:var(--bg);color:var(--fg);padding:14px 16px;font-weight:600}.data-table td{border-bottom:1px solid var(--border);color:#3f3f46;padding:14px 16px}.data-table tr:last-child td{border-bottom:none}.data-table tr.normal-row{background:#f0fdf4}.faq-item{border:1px solid var(--border);border-radius:var(--radius);background:var(--bg-elevated);margin-bottom:10px;padding:18px 22px;transition:all .15s}.faq-item:hover{border-color:var(--accent)}.faq-item summary{cursor:pointer;color:var(--fg);justify-content:space-between;align-items:center;gap:12px;font-size:16px;font-weight:600;list-style:none;display:flex}.faq-item summary::-webkit-details-marker{display:none}.faq-item summary:after{content:"+";color:var(--accent);font-size:22px;font-weight:300;transition:transform .2s}.faq-item[open] summary:after{content:"−"}.faq-item p{color:var(--fg-muted);margin-top:14px;line-height:1.7}