:root {
    --primary-color: #4285F4;
    --secondary-color: #34A853;
    --accent-color: #FBBC05;
    --text-color: #333333;
    --light-gray: #f5f5f5;
    --dark-gray: #666666;
    --white: #ffffff;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Source Han Serif CN', 'Noto Serif SC', serif;
    color: var(--text-color);
    line-height: 1.6;
}

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

a {
    text-decoration: none;
    color: var(--primary-color);
}

ul {
    list-style: none;
}

/* Header */
header {
    background-color: var(--white);
    box-shadow: var(--shadow);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

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

.logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
}

nav ul {
    display: flex;
}

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

nav ul li a {
    color: var(--text-color);
    font-weight: 500;
    transition: var(--transition);
}

nav ul li a:hover {
    color: var(--primary-color);
}

/* Hero Section */
.hero {
    padding: 150px 0 100px;
    background-color: var(--light-gray);
}

.hero .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

@media (max-width: 768px) {
    .hero .container {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-content {
        padding-right: 0;
        margin-bottom: 30px;
    }
}

.hero-content {
    flex: 1;
    padding-right: 50px;
}

.hero-image {
    flex: 1;
    text-align: center;
}

.hero-image img {
    max-width: 100%;
    width: 500px; /* 设置固定宽度 */
    height: auto; /* 保持图片比例 */
    border-radius: 10px;
    box-shadow: var(--shadow);
    object-fit: contain; /* 确保图片完整显示 */
}

/* 响应式调整 */
@media (max-width: 768px) {
    .hero-image img {
        width: 100%; /* 在小屏幕上占满容器宽度 */
        max-width: 350px; /* 但不超过这个最大宽度 */
    }
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    color: var(--dark-gray);
}

.cta-button {
    display: inline-block;
    background-color: var(--primary-color);
    color: var(--white);
    padding: 12px 30px;
    border-radius: 30px;
    font-weight: 500;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

.cta-button.secondary {
    background-color: var(--white);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

/* Features Section */
.features {
    padding: 100px 0;
    background-color: var(--white);
}

h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 50px;
    color: var(--primary-color);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-card {
    background-color: var(--white);
    padding: 30px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-10px);
}

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

.feature-card h3 {
    margin-bottom: 15px;
    color: var(--primary-color);
}

/* Value Section */
.value {
    padding: 100px 0;
    background-color: var(--light-gray);
}

.value-content {
    /* 移除flex布局，因为不再需要并排显示文字和图片 */
    /* display: flex; */
    /* align-items: center; */
    /* gap: 50px; */
}

.value-text {
    /* 移除flex: 1，使其占据全部宽度 */
    /* flex: 1; */
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

/* 可以保留这些样式，但不会被使用 */
.value-image {
    flex: 1;
    text-align: center;
}

.value-image img {
    max-width: 100%;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.value-text h3 {
    margin: 20px 0 10px;
    color: var(--primary-color);
}

/* Pricing Section */
.pricing {
    padding: 100px 0;
    background-color: var(--white);
}

.pricing-cards {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
}

.pricing-card {
    background-color: var(--white);
    padding: 40px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    flex: 1;
    max-width: 350px;
    text-align: center;
    position: relative;
    transition: var(--transition);
}

.pricing-card:hover {
    transform: translateY(-10px);
}

.pricing-card.featured {
    border: 2px solid var(--primary-color);
    transform: scale(1.05);
}

.pricing-card.featured:hover {
    transform: scale(1.05) translateY(-10px);
}

.featured-label {
    position: absolute;
    top: -15px;
    right: 30px;
    background-color: var(--primary-color);
    color: var(--white);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

.price {
    font-size: 2.5rem;
    font-weight: 700;
    margin: 20px 0;
    color: var(--primary-color);
}

.price span {
    font-size: 1rem;
    color: var(--dark-gray);
}

.pricing-card ul {
    margin: 30px 0;
    text-align: left;
}

.pricing-card ul li {
    margin-bottom: 15px;
}

/* Contact Section */
.contact {
    padding: 100px 0;
    background-color: var(--light-gray);
    text-align: center;
}

.contact p {
    font-size: 1.2rem;
    margin-top: 20px;
}

/* Footer */
footer {
    background-color: var(--light-gray);
    padding: 30px 0;
    text-align: center;
}

footer p {
    color: var(--dark-gray);
    margin-bottom: 15px;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 20px;
}

.footer-links a {
    color: var(--primary-color);
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-links a:hover {
    text-decoration: underline;
}

/* Privacy Policy Page */
.privacy-policy {
    padding: 150px 0 80px;
}

.privacy-policy h1 {
    text-align: center;
    margin-bottom: 10px;
}

.last-updated {
    text-align: center;
    color: var(--dark-gray);
    font-size: 0.9rem;
    margin-bottom: 40px;
}

.policy-section {
    margin-bottom: 40px;
}

.policy-section h2 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    text-align: left;
}

.policy-section h3 {
    font-size: 1.2rem;
    margin: 20px 0 10px;
    color: var(--primary-color);
}

.policy-section p, 
.policy-section ul {
    margin-bottom: 15px;
}

.policy-section ul {
    padding-left: 20px;
    list-style-type: disc;
}

.policy-section ul li {
    margin-bottom: 8px;
}

/* 移动端菜单 */
.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 21px;
    cursor: pointer;
}

.menu-toggle span {
    display: block;
    height: 3px;
    width: 100%;
    background-color: var(--primary-color);
    border-radius: 3px;
    transition: var(--transition);
}

header.scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero .container,
    .value-content {
        flex-direction: column;
    }
    
    .hero-content,
    .value-text {
        padding-right: 0;
        margin-bottom: 50px;
    }
    
    .pricing-card {
        max-width: 100%;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    nav {
        position: absolute;
        top: 80px;
        left: 0;
        width: 100%;
        background-color: var(--white);
        box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
        padding: 20px;
        transform: translateY(-150%);
        transition: transform 0.3s ease;
        z-index: 999;
    }
    
    nav.active {
        transform: translateY(0);
    }
    
    nav ul {
        display: flex;
        flex-direction: column;
        align-items: center;
    }
    
    nav ul li {
        margin: 10px 0;
    }
    
    .menu-toggle.active span:nth-child(1) {
        transform: translateY(9px) rotate(45deg);
    }
    
    .menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .menu-toggle.active span:nth-child(3) {
        transform: translateY(-9px) rotate(-45deg);
    }
}