:root {
    --alex-primary: #2563eb;
    --alex-secondary: #1e40af;
    --alex-accent: #3b82f6;
    --alex-light: #f0f9ff;
    --alex-dark: #1e293b;
    --alex-success: #10b981;
    --alex-warning: #f59e0b;
}

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

.alex-body {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    color: var(--alex-dark);
    line-height: 1.6;
    min-height: 100vh;
}

.alex-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.alex-header {
    text-align: center;
    padding: 50px 0;
    background: linear-gradient(to right, var(--alex-primary), var(--alex-secondary));
    color: white;
    border-radius: 15px;
    margin-bottom: 40px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.alex-h1 {
    font-size: 2.8rem;
    margin-bottom: 15px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.alex-subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 700px;
    margin: 0 auto;
}

.alex-section {
    background: white;
    border-radius: 15px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: transform 0.3s ease;
}

.alex-section:hover {
    transform: translateY(-5px);
}

.alex-h2 {
    color: var(--alex-primary);
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid #f0f0f0;
    display: flex;
    align-items: center;
}

.alex-h2 i {
    margin-right: 10px;
    font-size: 1.5rem;
}

.alex-form-group {
    margin-bottom: 20px;
}

.alex-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
}

.alex-input, .alex-select, .alex-textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s;
}

.alex-input:focus, .alex-select:focus, .alex-textarea:focus {
    border-color: var(--alex-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
    outline: none;
}

.alex-btn {
    display: inline-block;
    background: linear-gradient(to right, var(--alex-primary), var(--alex-secondary));
    color: white;
    padding: 12px 30px;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    text-align: center;
    box-shadow: 0 4px 10px rgba(37, 99, 235, 0.3);
}

.alex-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 15px rgba(37, 99, 235, 0.4);
}

.alex-btn-secondary {
    background: linear-gradient(to right, var(--alex-success), var(--alex-warning));
}

.alex-btn:disabled {
    background: #cccccc;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.alex-card-container {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 20px;
}

.alex-card {
    flex: 1;
    min-width: 250px;
    background: white;
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: all 0.3s;
    border-top: 4px solid var(--alex-primary);
}

.alex-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}

.alex-card h3 {
    color: var(--alex-primary);
    margin-bottom: 15px;
    font-size: 1.3rem;
}

.alex-card p {
    color: #555;
}

.alex-promo-code {
    background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
    padding: 15px;
    border-radius: 10px;
    text-align: center;
    margin: 20px 0;
    font-weight: bold;
    font-size: 1.5rem;
    letter-spacing: 2px;
    color: var(--alex-dark);
    border: 2px dashed var(--alex-primary);
}

.alex-tracking-system {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 20px;
}

.alex-tracking-step {
    flex: 1;
    min-width: 200px;
    text-align: center;
    padding: 20px;
}

.alex-step-number {
    display: inline-block;
    width: 40px;
    height: 40px;
    background: var(--alex-primary);
    color: white;
    border-radius: 50%;
    line-height: 40px;
    margin-bottom: 15px;
    font-weight: bold;
}

.alex-reward-item {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 10px;
}

.alex-reward-icon {
    width: 50px;
    height: 50px;
    background: var(--alex-success);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 15px;
    font-weight: bold;
}

.alex-partner-type {
    background: linear-gradient(135deg, #dbeafe 0%, #e0f2fe 100%);
    border-top: 4px solid var(--alex-secondary);
}

.alex-partner-type h3 {
    color: var(--alex-secondary);
}

.alex-promo-section {
    display: none;
}

.alex-download-btn {
    display: inline-block;
    margin-top: 15px;
    background: var(--alex-success);
}

footer {
    text-align: center;
    padding: 30px 0;
    margin-top: 40px;
    color: #666;
    border-top: 1px solid #eee;
}

@media (max-width: 768px) {
    .alex-card-container {
        flex-direction: column;
    }
    
    .alex-h1 {
        font-size: 2.2rem;
    }
}