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

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

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

/* 导航栏 */
.navbar {
    background-color: #fff;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    padding: 15px 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

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

.logo h1 {
    color: #ff7f00;
    font-size: 24px;
}

.nav-links {
    display: flex;
    gap: 20px;
}

.nav-links a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    font-size: 24px;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: #ff7f00;
}

/* 英雄区域 */
.hero {
    margin-top: 80px;
    padding: 80px 0;
    background-color: #fff3e0;
}

.hero .container {
    display: flex;
    align-items: center;
    gap: 40px;
}

.hero-content {
    flex: 1;
}

.hero-content h1 {
    font-size: 36px;
    margin-bottom: 20px;
    color: #ff7f00;
}

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

.btn-primary {
    background-color: #ff7f00;
    color: #fff;
    padding: 12px 24px;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.btn-primary:hover {
    background-color: #e66f00;
}

.hero-image {
    flex: 1;
}

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

/* 功能区域 */
.features {
    padding: 80px 0;
    background-color: #fff;
}

.features h2 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 60px;
    color: #ff7f00;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.feature-card {
    background-color: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
}

.feature-card h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: #ff7f00;
}

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

/* 优势区域 */
.advantages {
    padding: 80px 0;
    background-color: #fff3e0;
}

.advantages h2 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 60px;
    color: #ff7f00;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.advantage-card {
    background-color: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.advantage-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
}

.advantage-card h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: #ff7f00;
}

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

/* 使用方法区域 */
.how-it-works {
    padding: 80px 0;
    background-color: #fff;
}

.how-it-works h2 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 20px;
    color: #ff7f00;
}

.how-it-works > p {
    text-align: center;
    font-size: 18px;
    margin-bottom: 60px;
    color: #666;
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.step-card {
    background-color: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.step-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
}

.step-number {
    display: inline-block;
    width: 50px;
    height: 50px;
    background-color: #ff7f00;
    color: #fff;
    border-radius: 50%;
    line-height: 50px;
    font-size: 20px;
    font-weight: bold;
    margin-bottom: 20px;
}

.step-card h3 {
    font-size: 18px;
    color: #333;
}

/* 价格区域 */
.pricing {
    padding: 80px 0;
    background-color: #fff3e0;
}

.pricing h2 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 20px;
    color: #ff7f00;
}

.pricing > p {
    text-align: center;
    font-size: 18px;
    margin-bottom: 60px;
    color: #666;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.pricing-card {
    background-color: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.pricing-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
}

.pricing-card.featured {
    border: 2px solid #ff7f00;
    transform: scale(1.05);
}

.pricing-card h3 {
    font-size: 24px;
    margin-bottom: 20px;
    color: #ff7f00;
}

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

.pricing-card ul li {
    padding: 10px 0;
    color: #666;
    border-bottom: 1px solid #eee;
}

.pricing-card ul li:last-child {
    border-bottom: none;
}

.btn-secondary {
    background-color: #fff;
    color: #ff7f00;
    padding: 12px 24px;
    border: 1px solid #ff7f00;
    border-radius: 4px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background-color: #ff7f00;
    color: #fff;
}

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

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

.footer-content {
    display: flex;
    justify-content: space-between;
    width: 100%;
    margin-bottom: 30px;
}

.footer-logo h2 {
    color: #ff7f00;
    font-size: 24px;
}

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

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

.footer-links a:hover {
    color: #ff7f00;
}

.footer-bottom {
    width: 100%;
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #444;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero .container {
        flex-direction: column;
        text-align: center;
    }

    .features-grid,
    .advantages-grid,
    .steps-grid,
    .pricing-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        align-items: center;
        gap: 20px;
    }

    .nav-links {
        display: none;
    }
}

@media (max-width: 992px) {
    .advantages-grid,
    .steps-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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