.hero {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
}

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(30, 58, 138, 0.9) 0%, rgba(30, 58, 138, 0.8) 50%, rgba(245, 158, 11, 0.9) 100%);
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    color: white;
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 3rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin-top: 3rem;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1rem;
    opacity: 0.9;
}

.section {
    padding: 6rem 0;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.section-description {
    text-align: center;
    font-size: 1.125rem;
    color: #6b7280;
    max-width: 700px;
    margin: 0 auto 3rem;
}

.grid {
    display: grid;
    gap: 2rem;
}

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

.card {
    background: white;
    border: 2px solid #e5e7eb;
    border-radius: 0.75rem;
    padding: 2rem;
    transition: all 0.3s;
}

.card:hover {
    border-color: #1e3a8a;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transform: translateY(-5px);
}

.card-icon {
    width: 4rem;
    height: 4rem;
    border-radius: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    font-size: 2rem;
    color: white;
}

.card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.card p {
    color: #6b7280;
    line-height: 1.7;
}

.gradient-card {
    border-radius: 0.75rem;
    padding: 2rem;
    color: white;
}

.gradient-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 0.5rem;
    margin-bottom: 1rem;
}

.gradient-card-badge {
    background: rgba(255,255,255,0.2);
    padding: 0.5rem 1rem;
    border-radius: 1rem;
    display: inline-block;
    margin-bottom: 1rem;
    font-size: 0.875rem;
}

.gradient-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.gradient-card p {
    opacity: 0.9;
    margin-bottom: 1.5rem;
}

.gradient-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.gradient-card-price {
    font-size: 2rem;
    font-weight: 700;
}

.bg-gradient {
    background: linear-gradient(135deg, #eff6ff 0%, #fff7ed 100%);
}

.bg-blue {
    background: linear-gradient(135deg, #3b82f6 0%, #1e3a8a 100%);
}

.bg-pink {
    background: linear-gradient(135deg, #ec4899 0%, #be185d 100%);
}

.bg-orange {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

.bg-purple {
    background: linear-gradient(135deg, #8b5cf6 0%, #6d28d9 100%);
}

.footer {
    background: #111827;
    color: white;
    padding: 4rem 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer h3 {
    margin-bottom: 1.5rem;
    font-size: 1.25rem;
}

.footer ul {
    list-style: none;
}

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

.footer a {
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    transition: color 0.3s;
}

.footer a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 2rem;
    text-align: center;
    color: rgba(255,255,255,0.5);
}

.footer-text {
    color: rgba(255,255,255,0.7);
    line-height: 1.7;
}

.text-orange {
    color: #f59e0b;
}

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

/* Responsive */
@media (max-width: 1024px) {
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .navbar-menu {
        display: none;
    }

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

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

    .container {
        padding: 0 1rem;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .grid-4 {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 480px) {
    .hero h1 {
        font-size: 2rem;
    }

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

/* 移动端优化 */
@media (max-width: 768px) {
    .hero {
        min-height: 60vh;
    }

    .hero-content h1 {
        font-size: 2rem !important;
        line-height: 1.2;
    }

    .hero-content p {
        font-size: 1rem !important;
    }

    .hero-stats {
        flex-direction: column;
        gap: 1.5rem;
    }

    .stat-item h3 {
        font-size: 2rem !important;
    }

    .stat-item p {
        font-size: 0.875rem !important;
    }

    .section-title {
        font-size: 1.75rem !important;
    }

    .section-description {
        font-size: 1rem !important;
    }

    .grid {
        grid-template-columns: 1fr !important;
        gap: 1.5rem;
    }

    .card {
        padding: 1.5rem;
    }

    .card h3 {
        font-size: 1.25rem;
    }

    .footer-grid {
        grid-template-columns: 1fr !important;
        gap: 2rem;
    }

    .btn {
        padding: 0.625rem 1.25rem;
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 0.75rem;
    }

    .hero-content h1 {
        font-size: 1.5rem !important;
    }

    .hero-content p {
        font-size: 0.875rem !important;
    }

    .section-title {
        font-size: 1.5rem !important;
    }

    .navbar-inner {
        padding: 0.75rem 1rem;
    }
}


/* 移动端优化 */
@media (max-width: 768px) {
    .hero {
        min-height: 60vh;
    }

    .hero-content h1 {
        font-size: 2rem !important;
        line-height: 1.2;
    }

    .hero-content p {
        font-size: 1rem !important;
    }

    .hero-stats {
        flex-direction: column;
        gap: 1.5rem;
    }

    .stat-item h3 {
        font-size: 2rem !important;
    }

    .stat-item p {
        font-size: 0.875rem !important;
    }

    .section-title {
        font-size: 1.75rem !important;
    }

    .section-description {
        font-size: 1rem !important;
    }

    .grid {
        grid-template-columns: 1fr !important;
        gap: 1.5rem;
    }

    .card {
        padding: 1.5rem;
    }

    .card h3 {
        font-size: 1.25rem;
    }

    .footer-grid {
        grid-template-columns: 1fr !important;
        gap: 2rem;
    }

    .btn {
        padding: 0.625rem 1.25rem;
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 0.75rem;
    }

    .hero-content h1 {
        font-size: 1.5rem !important;
    }

    .hero-content p {
        font-size: 0.875rem !important;
    }

    .section-title {
        font-size: 1.5rem !important;
    }

    .navbar-inner {
        padding: 0.75rem 1rem;
    }
}