/* --- 核心优势展示 (Core Advantages) --- */
.core-advantages {
    padding: 40px 4%;
    background-color: var(--color-white);
    position: relative;
}

.core-advantages .section-title {
    text-align: center;
    margin: 40px 0;
}

.core-advantages .section-title h2 {
    font-size: 2.5rem;
    font-weight: 300;
    margin-bottom: 15px;
    letter-spacing: 3px;
    color: var(--color-primary);
}

/* .core-advantages .section-title p {
    font-size: 1.1rem;
    color: var(--color-text-light);
    letter-spacing: 1px;
} */

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    max-width: 1200px;
    margin: 0 auto;
}

.advantage-item {
    text-align: center;
    padding: 40px 30px;
    background: linear-gradient(135deg, var(--color-white) 0%, var(--color-secondary) 100%);
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.advantage-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(197, 164, 126, 0.1), transparent);
    transition: left 0.6s ease;
}

.advantage-item:hover::before {
    left: 100%;
}

.advantage-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
}

.advantage-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 30px;
    position: relative;
}

.advantage-icon svg,
.advantage-icon img {
    width: 100%;
    height: 100%;
    transition: transform 0.3s ease;
}

.advantage-item:hover .advantage-icon svg,
.advantage-item:hover .advantage-icon img {
    transform: scale(1.1) rotate(5deg);
}

.advantage-item h3 {
    font-size: 1.4rem;
    font-weight: 500;
    margin-bottom: 20px;
    color: var(--color-primary);
    letter-spacing: 1px;
}

.advantage-item p {
    font-size: 0.95rem;
    line-height: 1.8;
    color: var(--color-text-light);
    margin: 0;
}

/* 动画效果 */
.advantage-item {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease forwards;
}

.advantage-item:nth-child(1) { animation-delay: 0.1s; }
.advantage-item:nth-child(2) { animation-delay: 0.2s; }
.advantage-item:nth-child(3) { animation-delay: 0.3s; }
.advantage-item:nth-child(4) { animation-delay: 0.4s; }

/* --- 移动端响应式 (Responsive) --- */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }

    .logo-text {
        font-size: 16px;
    }

    .logo-img {
        height: 32px;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .featured-section {
        flex-direction: column;
    }

    .news-list {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }

    .core-advantages {
        padding: 80px 4%;
    }

    .core-advantages .section-title h2 {
        font-size: 2rem;
        letter-spacing: 2px;
    }

    .advantages-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .advantage-item {
        padding: 30px 20px;
    }

    .advantage-icon {
        width: 60px;
        height: 60px;
    }

    .advantage-item h3 {
        font-size: 1.2rem;
    }

    .advantage-item p {
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .core-advantages {
        padding: 60px 4%;
    }

    .core-advantages .section-title {
        margin-bottom: 60px;
    }

    .core-advantages .section-title h2 {
        font-size: 1.8rem;
    }

    .advantages-grid {
        gap: 20px;
    }

    .advantage-item {
        padding: 25px 15px;
    }
}