:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --accent-color: #3b82f6;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-light: #f9fafb;
    --border-color: #e5e7eb;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
}

.navbar {
    background-color: #fff;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    padding: 1rem 0;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--primary-color) !important;
}

.nav-link {
    color: var(--text-dark) !important;
    font-weight: 500;
    margin: 0 0.5rem;
    transition: color 0.3s;
}

.nav-link:hover {
    color: var(--primary-color) !important;
}

.dropdown-menu {
    border: none;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    margin-top: 0.5rem;
    padding: 0.5rem 0;
}

.dropdown-item {
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
}

.dropdown-item:hover {
    background-color: var(--primary-color);
    color: #2563eb !important;
}
.dropdown-item:active {
    background-color: var(--primary-color);
    color: #ffffff !important;
}
.dropdown-divider {
    margin: 0.5rem 0;
    border-color: rgba(0, 0, 0, 0.05);
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    padding: 0.625rem 1.5rem;
    font-weight: 500;
    border-radius: 6px;
    transition: all 0.3s;
}

.btn-primary:hover {
    background-color: var(--secondary-color);
    border-color: var(--secondary-color);
    transform: translateY(-1px);
}

.btn-outline-primary {
    color: var(--primary-color);
    border-color: var(--primary-color);
    padding: 0.625rem 1.5rem;
    font-weight: 500;
    border-radius: 6px;
    transition: all 0.3s;
}

.btn-outline-primary:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}







.section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title h2 {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.section-title p {
    color: var(--text-light);
    font-size: 1.1rem;
}

.feature-card {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s;
    height: 100%;
}

.feature-card:hover {
    border-color: var(--primary-color);
    box-shadow: 0 10px 40px rgba(37, 99, 235, 0.1);
    transform: translateY(-5px);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: #fff;
    font-size: 1.75rem;
}

.feature-card h5 {
    font-weight: 600;
    margin-bottom: 1rem;
}

.feature-card p {
    color: var(--text-light);
    margin-bottom: 0;
}

.pricing-card {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2.5rem 2rem;
    text-align: center;
    transition: all 0.3s;
    height: 100%;
}

.pricing-card.featured {
    border-color: var(--primary-color);
    box-shadow: 0 10px 40px rgba(37, 99, 235, 0.15);
    transform: scale(1.05);
}

.pricing-card:hover {
    box-shadow: 0 10px 40px rgba(37, 99, 235, 0.1);
}

.pricing-card h4 {
    font-weight: 600;
    margin-bottom: 1rem;
}

.pricing-card .price {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.pricing-card .price span {
    font-size: 1rem;
    font-weight: 400;
    color: var(--text-light);
}

.pricing-card ul {
    list-style: none;
    padding: 0;
    margin-bottom: 2rem;
}

.pricing-card ul li {
    padding: 0.5rem 0;
    color: var(--text-light);
}

.pricing-card ul li i {
    color: var(--primary-color);
    margin-right: 0.5rem;
}

.stats-section {
    background-color: var(--bg-light);
}

.stat-item {
    text-align: center;
    padding: 2rem 1rem;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-light);
    font-size: 1rem;
}

.service-card {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    transition: all 0.3s;
}

.service-card:hover {
    border-color: var(--primary-color);
    box-shadow: 0 4px 20px rgba(37, 99, 235, 0.1);
}

.service-card h5 {
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.service-card p {
    color: var(--text-light);
    margin-bottom: 0;
    font-size: 0.95rem;
}

.form-control {
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.75rem 1rem;
    transition: border-color 0.3s;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

footer {
    background-color: #1f2937;
    color: #fff;
    padding: 60px 0 30px;
}

footer h5 {
    font-weight: 600;
    margin-bottom: 1.5rem;
}

footer ul {
    list-style: none;
    padding: 0;
}

footer ul li {
    margin-bottom: 0.75rem;
}

footer ul li a {
    color: #9ca3af;
    text-decoration: none;
    transition: color 0.3s;
}

footer ul li a:hover {
    color: #fff;
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 2rem;
    margin-top: 3rem;
    text-align: center;
    color: #9ca3af;
}

@media (max-width: 768px) {
    .banner-section {
        min-height: 400px;
    }


    .section {
        padding: 60px 0;
    }

    .pricing-card.featured {
        transform: scale(1);
    }
}

/* 轮播样式 */
.server-carousel {
    background: linear-gradient(to right, #e6f2ff 0%, #ffffff 100%);
    position: relative;
    overflow: hidden;
}

.carousel-item {
    height: 500px;
}

.carousel-content {
    position: relative;
    display: flex;
    align-items: center;
    padding: 4rem 5%;
    height: 100%;
}

.carousel-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.carousel-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.carousel-text {
    flex: 1;
    max-width: 500px;
    position: relative;
    z-index: 2;
    color: #000;
    padding: 2rem;
    border-radius: 8px;
}

.carousel-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #0074e8;
    margin-bottom: 1rem;
}

.carousel-desc {
    font-size: 1.1rem;
    color: #333;
    margin-bottom: 2rem;
    line-height: 1.8;
}

.btn-custom {
    background-color: #0074e8;
    color: #fff;
    border: none;
    padding: 0.8rem 2rem;
    font-size: 1rem;
    border-radius: 4px;
    transition: background 0.3s;
}

.btn-custom:hover {
    background-color: #005cb3;
    color: #fff;
}

.service-cards {
    background: #fff;
    padding: 2rem 5%;
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    cursor: pointer;
}

.carousel-service-card {
    flex: 1;
    padding: 1.5rem;
    background: #f8f9fa;
    border-radius: 4px;
    transition: all 0.3s;
}

.carousel-service-card.active {
    background: #e6f2ff;
}

.carousel-service-card h5 {
    font-weight: 600;
    color: #333;
    margin-bottom: 0.5rem;
}

.carousel-service-card.active h5 {
    color: #0074e8;
}

.carousel-service-card p {
    font-size: 0.9rem;
    color: #666;
    margin: 0;
}

.carousel-control-prev,
.carousel-control-next {
    width: 5%;
    opacity: 0.8;
}

.carousel-indicators [data-bs-target] {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: #ddd;
}

.carousel-indicators .active {
    background-color: #0074e8;
}

@media (max-width: 992px) {
    .carousel-content {
        flex-direction: column;
        text-align: center;
        padding: 2rem 5%;
    }

    .carousel-text {
        max-width: 100%;
        margin-bottom: 2rem;
    }

    .carousel-image {
        text-align: center;
    }

    .carousel-title {
        font-size: 2rem;
    }

    .service-cards {
        flex-direction: column;
    }
}