:root{--color-primary: #4f46e5;--color-primary-light: #6366f1;--color-primary-bg: #eef2ff;--color-success: #059669;--color-success-bg: #ecfdf5;--color-warning: #d97706;--color-warning-bg: #fffbeb;--color-gray-50: #f9fafb;--color-gray-100: #f3f4f6;--color-gray-200: #e5e7eb;--color-gray-300: #d1d5db;--color-gray-400: #9ca3af;--color-gray-500: #6b7280;--color-gray-600: #4b5563;--color-gray-700: #374151;--color-gray-800: #1f2937;--color-gray-900: #111827;--radius: 12px;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow: 0 1px 3px rgba(0, 0, 0, .1), 0 1px 2px rgba(0, 0, 0, .06);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -2px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -4px rgba(0, 0, 0, .1);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans SC,sans-serif;line-height:1.6;font-weight:400;color:var(--color-gray-800);background-color:var(--color-gray-50);font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{margin:0;padding:0;box-sizing:border-box}body{min-height:100vh;padding:20px}#root{max-width:640px;margin:0 auto}.app-header{text-align:center;margin-bottom:24px;padding:32px 0 16px}.app-header h1{font-size:28px;font-weight:700;color:var(--color-gray-900);letter-spacing:-.5px}.app-header p{font-size:14px;color:var(--color-gray-500);margin-top:4px}.card{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:24px;margin-bottom:16px;border:1px solid var(--color-gray-200)}.card-title{font-size:16px;font-weight:600;color:var(--color-gray-800);margin-bottom:20px;display:flex;align-items:center;gap:8px}.card-title .icon{width:20px;height:20px;display:inline-flex;align-items:center;justify-content:center;font-size:14px}.form-group{margin-bottom:16px}.form-group:last-child{margin-bottom:0}.form-label{display:block;font-size:13px;font-weight:500;color:var(--color-gray-600);margin-bottom:6px}.form-input{width:100%;padding:10px 12px;border:1px solid var(--color-gray-300);border-radius:8px;font-size:15px;color:var(--color-gray-800);background:#fff;transition:border-color .2s,box-shadow .2s;font-family:inherit}.form-input:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px #4f46e51a}.form-input::placeholder{color:var(--color-gray-400)}.form-hint{font-size:12px;color:var(--color-gray-400);margin-top:6px}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}.rate-type-toggle{display:flex;background:var(--color-gray-100);border-radius:8px;padding:3px;gap:2px}.rate-type-btn{flex:1;padding:8px 16px;border:none;border-radius:6px;font-size:14px;font-weight:500;color:var(--color-gray-500);background:transparent;cursor:pointer;transition:all .2s;font-family:inherit}.rate-type-btn:hover{color:var(--color-gray-700)}.rate-type-btn.active{background:#fff;color:var(--color-primary);box-shadow:var(--shadow-sm)}.rate-input-group{display:flex;align-items:center;gap:8px}.rate-input-group .form-input{flex:1}.rate-suffix{font-size:14px;color:var(--color-gray-500);font-weight:500;white-space:nowrap}.btn-calculate{width:100%;padding:12px;border:none;border-radius:8px;font-size:15px;font-weight:600;color:#fff;background:var(--color-primary);cursor:pointer;transition:background .2s,transform .1s;margin-top:20px;font-family:inherit}.btn-calculate:hover{background:var(--color-primary-light)}.btn-calculate:active{transform:scale(.99)}.result-card{background:linear-gradient(135deg,var(--color-primary) 0%,var(--color-primary-light) 100%);color:#fff;border:none}.result-card .card-title{color:#ffffffd9}.result-summary{display:grid;grid-template-columns:1fr 1fr;gap:16px}.result-item{text-align:center;padding:12px;background:#ffffff1f;border-radius:8px}.result-item.highlight{grid-column:1 / -1;background:#ffffff2e}.result-item .label{font-size:12px;color:#ffffffb3;margin-bottom:4px}.result-item .value{font-size:22px;font-weight:700;letter-spacing:-.5px}.result-item.highlight .value{font-size:28px}.result-item .sub{font-size:12px;color:#fff9;margin-top:2px}.steps-list{list-style:none}.step-item{display:flex;gap:12px;padding:12px 0;border-bottom:1px solid var(--color-gray-100)}.step-item:last-child{border-bottom:none;padding-bottom:0}.step-item:first-child{padding-top:0}.step-number{width:24px;height:24px;border-radius:50%;background:var(--color-primary-bg);color:var(--color-primary);font-size:12px;font-weight:600;display:flex;align-items:center;justify-content:center;flex-shrink:0;margin-top:1px}.step-content{flex:1;min-width:0}.step-label{font-size:13px;font-weight:600;color:var(--color-gray-700);margin-bottom:2px}.step-detail{font-size:13px;color:var(--color-gray-500);word-break:break-all;line-height:1.5}.step-item.step-total .step-number{background:var(--color-success-bg);color:var(--color-success)}.step-item.step-total .step-detail{color:var(--color-gray-700);font-weight:500}.app-footer{text-align:center;padding:24px 0;font-size:12px;color:var(--color-gray-400)}@media(max-width:480px){.form-row,.result-summary{grid-template-columns:1fr}.result-item.highlight{grid-column:1}}@keyframes fadeInUp{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.fade-in{animation:fadeInUp .3s ease-out}