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

body {
    font-family: Arial, Helvetica, sans-serif;
    line-height: 1.6;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Logo 样式 */
.logo-img {
    height: 40px;
    width: auto;
    transition: transform 0.3s ease;
}

.logo-img:hover {
    transform: scale(1.1);
}

/* 图片样式 */
.hero-img,
.about-img,
.product-img {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.hero-img:hover,
.about-img:hover,
.product-img:hover {
    transform: translateY(-5px);
}

/* 占位图样式 */
.image-placeholder {
    background-color: #f8f9fa;
    border: 2px dashed #1E90FF;
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 300px;
    padding: 2rem;
    text-align: center;
    color: #1E90FF;
}

.image-placeholder i {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.image-placeholder p {
    font-size: 1.1rem;
    color: #666;
}

.logo-placeholder {
    width: 40px;
    height: 40px;
    background-color: #1E90FF;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
}

.logo-placeholder i {
    font-size: 1.5rem;
}

/* 导航栏样式 */
.navbar {
    background-color: #fff;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    cursor: pointer;
}

.logo span {
    font-size: 1.5rem;
    font-weight: bold;
    color: #1E90FF;
}

.nav-links {
    display: flex;
    list-style: none;
}

.nav-links li {
    margin-left: 2rem;
}

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

.nav-links a:hover {
    color: #1E90FF;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background-color: #333;
    margin: 2px 0;
    transition: 0.3s;
}

/* 头部样式 */
.hero {
    background-color: #f8f9fa;
    padding: 8rem 2rem 4rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 100vh;
}

.hero-content {
    flex: 1;
    padding-right: 2rem;
}

.hero h1 {
    font-size: 3.5rem;
    color: #1E90FF;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;
    color: #666;
    margin-bottom: 2rem;
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-image img {
    max-width: 100%;
    height: auto;
}

.cta-button {
    display: inline-block;
    padding: 1rem 2rem;
    background-color: #1E90FF;
    color: #fff;
    text-decoration: none;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

.cta-button:hover {
    background-color: #1873CC;
}

/* 关于我们部分 */
.about-section {
    padding: 6rem 0;
    background-color: #fff;
}

.about-content {
    display: flex;
    align-items: center;
    gap: 4rem;
    margin-top: 3rem;
}

.about-text {
    flex: 1;
}

.about-text p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.about-image {
    flex: 1;
}

.about-image img {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

/* 产品部分样式 */
.product-section {
    padding: 6rem 0;
    background-color: #f8f9fa;
}

.product-content {
    display: flex;
    gap: 4rem;
    align-items: center;
    margin-top: 3rem;
}

.product-text {
    flex: 1;
}

.product-features {
    margin-top: 2rem;
}

.feature-item {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
}

.feature-item i {
    color: #1E90FF;
    margin-right: 1rem;
}

.product-image {
    flex: 1;
}

.product-image img {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

/* 功能部分样式 */
.features-section {
    padding: 6rem 0;
    background-color: #fff;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature {
    padding: 2rem;
    background-color: #f8f9fa;
    border-radius: 10px;
    text-align: center;
    transition: transform 0.3s ease;
}

.feature:hover {
    transform: translateY(-5px);
}

.feature i {
    font-size: 2.5rem;
    color: #1E90FF;
    margin-bottom: 1rem;
}

.feature h3 {
    color: #1E90FF;
    margin-bottom: 1rem;
}

/* 定价部分 */
.pricing-section {
    padding: 6rem 0;
    background: #fff;
}

.pricing-section h2 {
    text-align: center;
    margin-bottom: 1rem;
    color: #333;
    font-size: 2.5rem;
}

.pricing-subtitle {
    text-align: center;
    color: #666;
    margin-bottom: 3rem;
    font-size: 1.1rem;
}

.pricing-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    max-width: 1400px;
    margin: 0 auto;
}

.pricing-card {
    background: #fff;
    border: 2px solid #e0e0e0;
    border-radius: 15px;
    padding: 2rem;
    transition: all 0.3s ease;
    position: relative;
}

.pricing-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
}

.pricing-card.featured {
    border-color: #1E90FF;
    box-shadow: 0 5px 20px rgba(30,144,255,0.2);
}

.popular-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: #1E90FF;
    color: #fff;
    padding: 0.5rem 1.5rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: bold;
}

.plan-header {
    text-align: center;
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 2px solid #f0f0f0;
}

.plan-header h3 {
    font-size: 1.8rem;
    color: #333;
    margin-bottom: 1rem;
}

.price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 0.25rem;
}

.price .currency {
    font-size: 1.5rem;
    color: #666;
}

.price .amount {
    font-size: 3rem;
    font-weight: bold;
    color: #1E90FF;
}

.price .period {
    font-size: 1.2rem;
    color: #666;
}

.plan-features {
    list-style: none;
    margin-bottom: 2rem;
}

.plan-features li {
    padding: 0.75rem 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: #333;
}

.plan-features li i {
    color: #4CAF50;
    font-size: 1.1rem;
}

.plan-features li.disabled {
    color: #999;
}

.plan-features li.disabled i {
    color: #ccc;
}

.plan-button {
    display: block;
    width: 100%;
    padding: 1rem;
    text-align: center;
    border-radius: 8px;
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s ease;
}

.plan-button.basic {
    background: #f0f0f0;
    color: #333;
}

.plan-button.basic:hover {
    background: #e0e0e0;
}

.plan-button.standard {
    background: #4CAF50;
    color: #fff;
}

.plan-button.standard:hover {
    background: #45a049;
    transform: scale(1.05);
}

.plan-button.pro {
    background: #1E90FF;
    color: #fff;
}

.plan-button.pro:hover {
    background: #1873CC;
    transform: scale(1.05);
}

.plan-button.enterprise {
    background: #333;
    color: #fff;
}

.plan-button.enterprise:hover {
    background: #555;
}

/* 结账部分 */
.checkout-section {
    padding: 6rem 0;
    background: #f8f9fa;
}

.checkout-section h2 {
    text-align: center;
    margin-bottom: 3rem;
    color: #333;
    font-size: 2.5rem;
}

.checkout-content {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 3rem;
    max-width: 1200px;
    margin: 0 auto;
}

.checkout-form {
    background: #fff;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.checkout-form h3 {
    margin-bottom: 1.5rem;
    color: #333;
    font-size: 1.5rem;
}

.plan-selector {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
}

.plan-option {
    display: flex;
    align-items: center;
    padding: 1rem;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.plan-option:hover {
    border-color: #1E90FF;
    background: #f0f8ff;
}

.plan-option input[type="radio"] {
    margin-right: 1rem;
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.plan-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.plan-price {
    color: #1E90FF;
    font-weight: bold;
    font-size: 1.2rem;
}

.billing-info {
    margin-top: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: #333;
    font-weight: 500;
}

.form-group input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: #1E90FF;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.payment-info {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 2px solid #f0f0f0;
}

.payment-notice {
    background: #f0f8ff;
    padding: 1rem;
    border-radius: 8px;
    color: #1E90FF;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.payment-methods {
    background: #f8f9fa;
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
}

.payment-methods-title {
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 0.75rem;
    font-weight: 500;
}

.payment-icons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.payment-icon {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.5rem 1rem;
    background: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 6px;
    font-size: 0.9rem;
    color: #333;
    transition: all 0.3s ease;
}

.payment-icon:hover {
    border-color: #1E90FF;
    box-shadow: 0 2px 8px rgba(30,144,255,0.1);
}

.checkout-button {
    width: 100%;
    padding: 1rem;
    background: #1E90FF;
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.checkout-button:hover {
    background: #1873CC;
    transform: scale(1.02);
}

.terms-notice {
    text-align: center;
    color: #666;
    font-size: 0.9rem;
    margin-top: 1rem;
}

.terms-notice a {
    color: #1E90FF;
    text-decoration: none;
}

.terms-notice a:hover {
    text-decoration: underline;
}

.checkout-summary {
    background: #fff;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    height: fit-content;
    position: sticky;
    top: 2rem;
}

.checkout-summary h3 {
    margin-bottom: 1.5rem;
    color: #333;
    font-size: 1.5rem;
}

.summary-item {
    display: flex;
    justify-content: space-between;
    padding: 0.75rem 0;
    color: #666;
}

.summary-item.total {
    font-size: 1.3rem;
    font-weight: bold;
    color: #333;
}

.summary-divider {
    height: 2px;
    background: #f0f0f0;
    margin: 1rem 0;
}

.summary-features {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 2px solid #f0f0f0;
}

.summary-features h4 {
    margin-bottom: 1rem;
    color: #333;
}

.summary-features ul {
    list-style: none;
}

.summary-features li {
    padding: 0.5rem 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #666;
}

.summary-features li i {
    color: #4CAF50;
}

.money-back {
    margin-top: 2rem;
    padding: 1rem;
    background: #f0f8ff;
    border-radius: 8px;
    text-align: center;
    color: #1E90FF;
}

.money-back i {
    font-size: 1.5rem;
    display: block;
    margin-bottom: 0.5rem;
}

.money-back p {
    margin: 0;
    font-weight: 500;
}

/* 联系我们部分 */
.contact {
    padding: 4rem 0;
    background: #f8f9fa;
}

.contact h2 {
    text-align: center;
    margin-bottom: 3rem;
    color: #333;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.5rem;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    transition: transform 0.3s ease;
}

.contact-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.contact-item i {
    font-size: 1.5rem;
    color: #1E90FF;
    margin-top: 0.25rem;
}

.contact-item div {
    flex: 1;
}

.contact-item strong {
    display: block;
    color: #333;
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.contact-item p {
    color: #666;
    margin: 0.25rem 0;
}

.contact-item .small-text {
    font-size: 0.9rem;
    color: #999;
}

/* 页脚样式 */
footer {
    background-color: #333;
    color: #fff;
    padding: 4rem 0 2rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 2rem;
    text-decoration: none;
    cursor: pointer;
    transition: opacity 0.3s ease;
}

.footer-logo:hover {
    opacity: 0.8;
}

.footer-logo .logo-img {
    height: 40px;
    width: auto;
}

.footer-logo span {
    font-size: 1.5rem;
    font-weight: bold;
    color: #fff;
}

.footer-links {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
}

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

.footer-links a:hover {
    color: #1E90FF;
}

.footer-social {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.footer-social a {
    color: #fff;
    font-size: 1.5rem;
    transition: color 0.3s ease;
}

.footer-social a:hover {
    color: #1E90FF;
}

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

.company-info {
    text-align: center;
    font-size: 0.9rem;
    color: rgba(255,255,255,0.7);
}

.company-info span {
    margin: 0 0.5rem;
}

/* 响应式设计 */
@media screen and (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: #fff;
        flex-direction: column;
        padding: 1rem 0;
    }

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

    .nav-links li {
        margin: 0.5rem 2rem;
    }

    .hero {
        flex-direction: column;
        text-align: center;
        padding: 6rem 1rem 3rem;
    }

    .hero-content {
        padding-right: 0;
        margin-bottom: 2rem;
    }

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

    .about-content,
    .product-content,
    .contact-content {
        flex-direction: column;
    }

    .footer-links {
        flex-wrap: wrap;
    }

    .pricing-cards {
        grid-template-columns: 1fr;
    }

    .checkout-content {
        grid-template-columns: 1fr;
    }

    .checkout-summary {
        position: static;
    }
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}