/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f9f9f9;
}

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

/* 导航栏 */
.navbar {
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo {
    text-decoration: none;
}

.logo-text {
    font-size: 24px;
    font-weight: 700;
    color: #3a7bd5;
}

.nav-links {
    display: flex;
    gap: 30px;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: #3a7bd5;
}

.login-btn {
    background-color: #3a7bd5;
    color: #fff !important;
    padding: 8px 20px;
    border-radius: 50px;
    transition: background-color 0.3s ease;
}

.login-btn:hover {
    background-color: #2a64c9;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background-color: #333;
    border-radius: 3px;
}

/* 英雄区域 */
.hero {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    padding: 100px 0;
}

.hero-content {
    display: flex;
    align-items: center;
    gap: 50px;
}

.hero-text {
    flex: 1;
}

.hero-text h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-text p {
    font-size: 18px;
    margin-bottom: 30px;
    color: #666;
}

.hero-buttons {
    display: flex;
    gap: 20px;
}

.btn-primary {
    background-color: #3a7bd5;
    color: #fff;
    padding: 12px 30px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
    border: none;
    cursor: pointer;
}

.btn-primary:hover {
    background-color: #2a64c9;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(58, 123, 213, 0.3);
}

.btn-secondary {
    background-color: transparent;
    color: #3a7bd5;
    padding: 12px 30px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: 2px solid #3a7bd5;
}

.btn-secondary:hover {
    background-color: #3a7bd5;
    color: #fff;
}

.hero-image {
    flex: 1;
}

.hero-image img {
    width: 100%;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

/* 通用部分样式 */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 15px;
}

.section-header p {
    font-size: 16px;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

/* 功能特色 */
.features {
    padding: 100px 0;
    background-color: #fff;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    background-color: #f9f9f9;
    padding: 40px;
    border-radius: 10px;
    transition: all 0.3s ease;
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background-color: #e6f0ff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: #3a7bd5;
    font-size: 24px;
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 15px;
}

.feature-card p {
    color: #666;
}

/* 如何工作 */
.how-it-works {
    padding: 100px 0;
    background-color: #f9f9f9;
}

.steps-container {
    display: flex;
    gap: 50px;
    justify-content: center;
}

.step {
    text-align: center;
    max-width: 300px;
}

.step-number {
    width: 80px;
    height: 80px;
    background-color: #3a7bd5;
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 700;
    margin: 0 auto 20px;
}

.step h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 15px;
}

.step p {
    color: #666;
}

/* 价格方案 */
.pricing {
    padding: 100px 0;
    background-color: #fff;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    max-width: 1000px;
    margin: 0 auto;
}

.pricing-card {
    background-color: #f9f9f9;
    padding: 40px;
    border-radius: 10px;
    text-align: center;
    transition: all 0.3s ease;
}

.pricing-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.pricing-card.featured {
    background-color: #3a7bd5;
    color: #fff;
    transform: scale(1.05);
}

.pricing-card.featured .btn-primary {
    background-color: #fff;
    color: #3a7bd5;
}

.pricing-card.featured .btn-primary:hover {
    background-color: #f0f0f0;
}

.pricing-header {
    margin-bottom: 30px;
}

.pricing-header h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 15px;
}

.price {
    font-size: 36px;
    font-weight: 700;
}

.price-period {
    font-size: 16px;
    font-weight: 400;
}

.pricing-features {
    list-style: none;
    margin-bottom: 30px;
}

.pricing-features li {
    padding: 10px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.pricing-card.featured .pricing-features li {
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

/* 联系我们 */
.contact {
    padding: 100px 0;
    background-color: #f9f9f9;
}

.contact-content {
    display: flex;
    justify-content: center;
}

.contact-info {
    max-width: 600px;
    width: 100%;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.contact-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 30px;
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.contact-icon {
    width: 60px;
    height: 60px;
    background-color: #e6f0ff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #3a7bd5;
    font-size: 24px;
    margin-bottom: 20px;
}

.contact-details h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
    color: #333;
}

.contact-details p {
    color: #666;
    margin-bottom: 5px;
}

.contact-details a {
    color: #3a7bd5;
    text-decoration: none;
    transition: color 0.3s ease;
}

.contact-details a:hover {
    color: #2a64c9;
    text-decoration: underline;
}



/* 页脚 */
.footer {
    background-color: #333;
    color: #fff;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo .logo-text {
    color: #fff;
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 10px;
    display: block;
}

.footer-logo p {
    color: #ccc;
}

.footer-links h4,
.footer-contact h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: #fff;
}

.footer-contact p {
    color: #ccc;
    margin-bottom: 10px;
}

.footer-contact a {
    color: #3a7bd5;
    text-decoration: none;
}

.footer-bottom {
    border-top: 1px solid #444;
    padding-top: 30px;
    text-align: center;
    color: #ccc;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: #fff;
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        padding: 20px;
        flex-direction: column;
        align-items: center;
        gap: 20px;
        z-index: 999;
    }

    .nav-links.active {
        display: flex;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .hero-content {
        flex-direction: column;
        text-align: center;
    }

    .hero-text h1 {
        font-size: 36px;
    }

    .hero-buttons {
        justify-content: center;
    }

    .steps-container {
        flex-direction: column;
        align-items: center;
    }

    .contact-content {
        flex-direction: column;
    }

    .section-header h2 {
        font-size: 28px;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 60px 0;
    }

    .features,
    .how-it-works,
    .pricing,
    .contact {
        padding: 60px 0;
    }

    .hero-text h1 {
        font-size: 28px;
    }

    .feature-card,
    .pricing-card {
        padding: 30px;
    }

    .price {
        font-size: 28px;
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.feature-card,
.step,
.pricing-card {
    animation: fadeIn 0.6s ease-out;
}

.feature-card:nth-child(1) { animation-delay: 0.1s; }
.feature-card:nth-child(2) { animation-delay: 0.2s; }
.feature-card:nth-child(3) { animation-delay: 0.3s; }
.feature-card:nth-child(4) { animation-delay: 0.4s; }
.feature-card:nth-child(5) { animation-delay: 0.5s; }
.feature-card:nth-child(6) { animation-delay: 0.6s; }

.step:nth-child(1) { animation-delay: 0.1s; }
.step:nth-child(2) { animation-delay: 0.2s; }
.step:nth-child(3) { animation-delay: 0.3s; }

.pricing-card:nth-child(1) { animation-delay: 0.1s; }
.pricing-card:nth-child(2) { animation-delay: 0.2s; }
.pricing-card:nth-child(3) { animation-delay: 0.3s; }

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #3a7bd5;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #2a64c9;
}