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

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

a {
    text-decoration: none;
    color: #0078d4;
}

ul {
    list-style: none;
}

.btn {
    display: inline-block;
    background-color: #0078d4;
    color: white;
    padding: 12px 24px;
    border-radius: 4px;
    font-weight: bold;
    transition: background-color 0.3s;
    border: none;
    cursor: pointer;
}

.btn:hover {
    background-color: #005a9e;
}

section {
    padding: 80px 0;
}

h2 {
    text-align: center;
    margin-bottom: 40px;
    font-size: 2.5rem;
    color: #333;
}

/* 导航栏 */
nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 10%;
    background-color: rgba(255, 255, 255, 0.9);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.logo {
    font-size: 1.8rem;
    font-weight: bold;
    color: #0078d4;
}

nav ul {
    display: flex;
}

nav ul li {
    margin-left: 30px;
}

nav ul li a {
    color: #333;
    font-weight: 500;
    transition: color 0.3s;
}

nav ul li a:hover {
    color: #0078d4;
}

/* 英雄区域 */
.hero {
    height: 50vh;
    background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('images/hero-bg.jpg');
    background-size: cover;
    background-position: center;
    color: white;
    display: flex;
    align-items: center;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.hero p {
    font-size: 1.5rem;
    margin-bottom: 30px;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

/* 产品特点 */
.features {
    background-color: white;
}

.features-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.feature-card {
    width: 300px;
    text-align: center;
    padding: 30px 20px;
    margin-bottom: 30px;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.feature-icon {
    font-size: 3rem;
    color: #0078d4;
    margin-bottom: 20px;
}

.feature-card h3 {
    margin-bottom: 15px;
    font-size: 1.5rem;
}

/* 技术优势 */
.technology {
    background-color: #f0f8ff;
}

.tech-container {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.tech-image {
    flex: 1;
    min-width: 300px;
    padding: 20px;
}

.tech-image img {
    width: 100%;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.tech-content {
    flex: 1;
    min-width: 300px;
    padding: 20px;
}

.tech-content h3 {
    margin-bottom: 20px;
    font-size: 1.8rem;
}

.tech-content ul {
    margin-bottom: 20px;
}

.tech-content li {
    margin-bottom: 10px;
    padding-left: 20px;
    position: relative;
}

.tech-content li:before {
    content: '✓';
    color: #0078d4;
    position: absolute;
    left: 0;
}

/* 收益分析 */
.benefits {
    background-color: white;
}

.benefits-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
    max-width: 1200px;
    margin: 0 auto 40px;
    padding: 0 20px;
}

.benefit-card {
    width: 300px;
    text-align: center;
    padding: 30px 20px;
    margin-bottom: 30px;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.benefit-card h3 {
    margin-bottom: 15px;
    font-size: 1.5rem;
}

.benefit-image {
    margin-bottom: 15px;
}

.benefit-image img {
    width: 100%;
    border-radius: 8px;
}

/* 收益计算器 */
.calculator {
    max-width: 800px;
    margin: 0 auto;
    padding: 30px;
    background-color: #f0f8ff;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.calculator h3 {
    text-align: center;
    margin-bottom: 20px;
    font-size: 1.8rem;
}

.calculator-form {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    margin-bottom: 20px;
}

.form-group {
    width: 30%;
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
}

.form-group input {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
}

.calculator-form .btn {
    margin-top: 15px;
}

.calculator-result {
    background-color: white;
    padding: 20px;
    border-radius: 4px;
    text-align: center;
}

/* 用户反馈 */
.testimonials {
    background-color: #f0f8ff;
}

.testimonials-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.testimonial-card {
    width: 300px;
    text-align: center;
    padding: 30px 20px;
    margin-bottom: 30px;
    border-radius: 8px;
    background-color: white;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.testimonial-image {
    width: 100px;
    height: 100px;
    margin: 0 auto 20px;
    border-radius: 50%;
    overflow: hidden;
}

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

.testimonial-text {
    font-style: italic;
    margin-bottom: 15px;
}

.testimonial-author {
    font-weight: bold;
}

/* 联系我们 */
.contact {
    background-color: white;
}

.contact-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.contact-form {
    flex: 1;
    min-width: 300px;
    padding: 20px;
}

.contact-form h3 {
    margin-bottom: 20px;
    font-size: 1.8rem;
}

.contact-form .form-group {
    width: 100%;
    margin-bottom: 15px;
}

.contact-form textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    resize: vertical;
}

.contact-info {
    flex: 1;
    min-width: 300px;
    padding: 20px;
}

.contact-info h3 {
    margin-bottom: 20px;
    font-size: 1.8rem;
}

.contact-info p {
    margin-bottom: 15px;
    display: flex;
    align-items: center;
}

.contact-info i {
    margin-right: 10px;
    color: #0078d4;
    font-size: 1.2rem;
}

.social-media {
    margin-top: 30px;
}

.social-icon {
    display: inline-block;
    margin-right: 15px;
    font-size: 1.5rem;
    color: #0078d4;
    transition: color 0.3s;
}

.social-icon:hover {
    color: #005a9e;
}

/* 页脚 */
footer {
    background-color: #333;
    color: white;
    padding: 40px 0;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    text-align: center;
}

.footer-logo {
    font-size: 1.8rem;
    font-weight: bold;
    margin-bottom: 20px;
    color: white;
}

.footer-links {
    margin-bottom: 20px;
}

.footer-links a {
    color: white;
    margin: 0 10px;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: #0078d4;
}

/* 响应式设计 */
@media (max-width: 768px) {
    nav {
        flex-direction: column;
        padding: 20px 5%;
    }
    
    nav ul {
        margin-top: 15px;
    }
    
    nav ul li {
        margin-left: 15px;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero p {
        font-size: 1.2rem;
    }
    
    .form-group {
        width: 100%;
    }
    
    .tech-container, .contact-container {
        flex-direction: column;
    }
}