* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
}

:root {
    --primary: #2c3e50;
    --secondary: #3498db;
    --accent: #e74c3c;
    --light: #f5f7fa;
    --dark: #1a2a3a;
    --gray: #e0e6ed;
    --success: #27ae60;
    --warning: #f39c12;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    --border: 1px solid #d1d8e0;
}

body {
    background: #f5f7fa;
    color: #333;
    min-height: 100vh;
    padding: 20px;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

header {
    background: white;
    border-radius: 12px;
    padding: 25px 30px;
    margin-bottom: 25px;
    box-shadow: var(--shadow);
    border: var(--border);
    text-align: center;
    position: relative;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-bottom: 15px;
}

.logo i {
    font-size: 2.5rem;
    color: var(--secondary);
}

h1 {
    font-size: 2.4rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--dark);
}

.subtitle {
    font-size: 1.1rem;
    color: #666;
    max-width: 800px;
    margin: 0 auto;
}

.main-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 25px;
    margin-bottom: 30px;
}

@media (max-width: 900px) {
    .main-content {
        grid-template-columns: 1fr;
    }
}

.config-section {
    background: white;
    border-radius: 12px;
    padding: 25px;
    box-shadow: var(--shadow);
    border: var(--border);
    max-height: 80vh;
    overflow-y: auto;
}

.section-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.4rem;
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--secondary);
    color: var(--dark);
    position: sticky;
    top: 0;
    background: white;
    z-index: 10;
}

.section-title i {
    color: var(--secondary);
    width: 30px;
    text-align: center;
}

.config-group {
    margin-bottom: 25px;
    padding: 15px;
    background: #f9fbfd;
    border-radius: 8px;
    border: var(--border);
}

.config-group h3 {
    margin-bottom: 15px;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--secondary);
}

.config-group h3 i {
    font-size: 1rem;
}

.select-wrapper {
    position: relative;
    margin-bottom: 15px;
}

.select-wrapper label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    color: #555;
}

select {
    width: 100%;
    padding: 12px 15px;
    border-radius: 6px;
    border: var(--border);
    background: white;
    font-size: 1rem;
    color: #333;
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%233498db' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 10px center;
    background-size: 16px;
    cursor: pointer;
    transition: all 0.3s;
}

select:hover {
    border-color: var(--secondary);
}

select:focus {
    outline: none;
    border-color: var(--secondary);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
}

.result-section {
    background: white;
    border-radius: 12px;
    padding: 25px;
    box-shadow: var(--shadow);
    border: var(--border);
    display: flex;
    flex-direction: column;
}

.price-display {
    background: linear-gradient(135deg, #2c3e50 0%, #1a2a3a 100%);
    border-radius: 12px;
    padding: 25px;
    text-align: center;
    margin-bottom: 25px;
    color: white;
}

.price-display h2 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: #e0e6ed;
}

.price-value {
    font-size: 2.8rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: white;
}

.base-price {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 10px;
}

.tax-note {
    font-size: 0.95rem;
    opacity: 0.8;
    margin-top: 8px;
}

.details-container {
    background: #f9fbfd;
    border-radius: 8px;
    padding: 20px;
    flex: 1;
    border: var(--border);
}

.details-container h3 {
    margin-bottom: 20px;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--dark);
}

.price-table {
    width: 100%;
    border-collapse: collapse;
}

.price-table th {
    background-color: #3498db;
    color: white;
    font-weight: 500;
    padding: 8px 12px;
    text-align: left;
}

.price-table td {
    padding: 12px;
    border-bottom: 1px solid #e0e6ed;
}

.price-table tr:last-child td {
    border-bottom: none;
}

.price-table tr:nth-child(even) {
    background-color: #f1f8ff;
}

.price-table .price-cell {
    font-weight: 600;
    color: var(--dark);
    text-align: right;
}

.price-table .summary-row {
    font-weight: 600;
    background-color: #e3f2fd;
}

.price-table .tax-row {
    background-color: #ffecb3;
}

.price-table .total-row {
    font-weight: 700;
    font-size: 1.1rem;
    background-color: #bbdefb;
}

.action-buttons {
    display: flex;
    gap: 15px;
    margin-top: 25px;
}

.btn {
    flex: 1;
    padding: 14px 20px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.btn-primary {
    background: var(--secondary);
    color: white;
}

.btn-secondary {
    background: #e0e6ed;
    color: var(--dark);
    border: 1px solid #cbd5e0;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.btn-primary:hover {
    background: #2980b9;
}

.btn-secondary:hover {
    background: #d1d8e0;
}

footer {
    text-align: center;
    padding: 25px 0;
    font-size: 0.9rem;
    color: #666;
    border-top: 1px solid #e0e6ed;
    margin-top: 20px;
}

.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--success);
    color: white;
    padding: 15px 25px;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    transform: translateX(200%);
    transition: transform 0.4s ease;
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: 10px;
}

.notification.show {
    transform: translateX(0);
}

.config-option {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}

.option-price {
    margin-left: auto;
    font-weight: 600;
    color: var(--success);
}

.config-section::-webkit-scrollbar {
    width: 8px;
}

.config-section::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 4px;
}

.config-section::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 4px;
}

.config-section::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}

.company-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 15px;
    border-bottom: 1px solid #eee;
    margin-bottom: 20px;
}

.company-logo {
    font-size: 2rem;
    color: var(--secondary);
}

.company-info {
    text-align: right;
    font-size: 0.9rem;
    color: #666;
}

.config-option input[type="checkbox"] {
    width: 18px;
    height: 18px;
}

.config-option input[type="radio"] {
    width: 18px;
    height: 18px;
}

.selected-info {
    font-size: 0.9rem;
    color: #555;
    margin-top: 5px;
}