/* AI 实验室页面样式 */
.ai-section {
    padding: 80px 0;
    background: var(--bg-light);
}

/* 介绍区域 */
.ai-intro {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    margin-bottom: 80px;
    align-items: center;
}

.intro-content h2 {
    font-size: 2.5rem;
    color: #1e3a8a;
    margin-bottom: 20px;
}

.intro-content p {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.intro-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.intro-stat-card {
    background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 100%);
    padding: 30px 20px;
    border-radius: 15px;
    text-align: center;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
}

.intro-stat-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(30, 58, 138, 0.4);
}

.stat-icon {
    font-size: 2.5rem;
    color: var(--white);
    margin-bottom: 15px;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 5px;
}

.stat-label {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1rem;
}

/* 功能卡片 */
.ai-features {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
    margin-bottom: 80px;
}

.ai-feature-card {
    background: var(--white);
    border-radius: 15px;
    padding: 35px 30px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.ai-feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.ai-feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 25px;
}

.feature-icon i {
    font-size: 2.5rem;
    background: linear-gradient(135deg, #1e3a8a, #1e40af);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.ai-feature-card h3 {
    font-size: 1.5rem;
    color: var(--text-dark);
    margin-bottom: 15px;
}

.ai-feature-card > p {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 20px;
}

.feature-list {
    list-style: none;
    margin-bottom: 25px;
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 0;
    color: var(--text-light);
}

.feature-list li i {
    color: #10b981;
}

.feature-status {
    margin-bottom: 20px;
}

.status-badge {
    display: inline-block;
    padding: 6px 15px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.status-badge.beta {
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    color: var(--white);
}

.feature-btn {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 100%);
    color: var(--white);
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.feature-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(30, 58, 138, 0.4);
}

.feature-btn:disabled {
    background: #cbd5e0;
    cursor: not-allowed;
}

/* 通知订阅 */
.notification-section {
    background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 100%);
    padding: 50px 40px;
    border-radius: 20px;
    text-align: center;
    color: var(--white);
    box-shadow: var(--shadow-lg);
}

.notification-section h3 {
    font-size: 2rem;
    margin-bottom: 15px;
}

.notification-section p {
    font-size: 1.1rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

.subscribe-form {
    max-width: 600px;
    margin: 0 auto;
}

.input-group {
    display: flex;
    gap: 15px;
}

.input-group input {
    flex: 1;
    padding: 15px 25px;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    outline: none;
}

.input-group input:focus {
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.3);
}

.subscribe-btn {
    padding: 15px 35px;
    background: var(--white);
    color: #1e3a8a;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 10px;
}

.subscribe-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .ai-features {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    }
}

@media (max-width: 768px) {
    .ai-intro {
        grid-template-columns: 1fr;
    }

    .intro-stats {
        grid-template-columns: 1fr;
    }

    .ai-features {
        grid-template-columns: 1fr;
    }

    .input-group {
        flex-direction: column;
    }

    .subscribe-btn {
        width: 100%;
        justify-content: center;
    }
}