/* 全局样式 */
:root {
    --primary-color: #4a6bff;
    --primary-dark: #3a56cc;
    --secondary-color: #6c757d;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    --white: #ffffff;
    --gray: #6c757d;
    --light-gray: #e9ecef;
}

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

body {
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: var(--white);
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 5px;
    font-weight: 500;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background-color: var(--primary-color);
    color: var(--white);
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-outline:hover {
    background-color: var(--primary-color);
    color: var(--white);
}

.btn-large {
    padding: 12px 30px;
    font-size: 1.1rem;
}

.section-title {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--dark-color);
    text-align: center;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--gray);
    margin-bottom: 40px;
    text-align: center;
}

/* 头部样式 */
header {
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    left: 0;
    z-index: 1000;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.logo h1 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--dark-color);
}

.logo h1 span {
    color: var(--primary-color);
}

nav ul {
    display: flex;
}

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

nav ul li a {
    font-weight: 500;
    color: var(--dark-color);
    transition: color 0.3s ease;
}

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

.login-btn .btn {
    padding: 8px 20px;
    font-size: 0.9rem;
}

/* Banner样式 - 已优化 */
.banner {
    padding: 180px 0 100px;
    background-image: url('https://images.unsplash.com/photo-1512941937669-90a1b58e7e9c?ixlib=rb-1.2.1&auto=format&fit=crop&w=1350&q=80');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    position: relative;
    margin-top: 70px;
    color: var(--white);
    text-align: center;
}

.banner-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    z-index: 1;
}

.banner .container {
    position: relative;
    z-index: 2;
}

.banner-content {
    max-width: 800px;
    margin: 0 auto;
}

.banner-content h1 {
    font-size: 3.2rem;
    font-weight: 800;
    margin-bottom: 20px;
    line-height: 1.2;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.banner-subtitle {
    font-size: 1.4rem;
    margin-bottom: 40px;
    opacity: 0.9;
}

.banner-stats {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-bottom: 40px;
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 5px;
    color: var(--primary-color);
}

.stat-label {
    font-size: 1rem;
    opacity: 0.9;
}

.banner-btns {
    display: flex;
    justify-content: center;
    gap: 20px;
}

/* 产品样式 */
.products {
    padding: 100px 0;
    background-color: var(--white);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.product-card {
    background-color: var(--white);
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    padding: 30px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
    overflow: hidden;
}

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

.product-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background-color: var(--danger-color);
    color: var(--white);
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

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

.product-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--dark-color);
}

.product-features {
    margin-bottom: 25px;
}

.product-features li {
    margin-bottom: 10px;
    display: flex;
    align-items: center;
}

.product-features i {
    margin-right: 10px;
    color: var(--success-color);
}

.product-price {
    margin-bottom: 15px;
    display: flex;
    align-items: center;
}

.price {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-right: 15px;
}

original-price {
    font-size: 1.2rem;
    color: var(--gray);
    text-decoration: line-through;
}

.product-commission {
    margin-bottom: 20px;
    font-size: 0.9rem;
    color: var(--gray);
}

.product-commission span {
    font-weight: 700;
    color: var(--success-color);
}

.btn-product {
    width: 100%;
    padding: 12px;
    font-weight: 600;
}

.view-more {
    text-align: center;
}

/* 优势样式 */
.advantages {
    padding: 100px 0;
    background-color: var(--light-gray);
}

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

.advantage-card {
    background-color: var(--white);
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease;
    text-align: center;
}

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

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

.advantage-card h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: var(--dark-color);
}

.advantage-card p {
    color: var(--gray);
    font-size: 0.95rem;
}

/* 合作伙伴样式 */
.partner {
    padding: 100px 0;
    background-color: var(--white);
}

.partner .container {
    display: flex;
    align-items: center;
    gap: 50px;
}

.partner-content {
    flex: 1;
}

.partner-image {
    flex: 1;
}

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

.partner-steps {
    margin: 40px 0;
}

.step {
    display: flex;
    margin-bottom: 25px;
    align-items: flex-start;
}

.step-number {
    width: 40px;
    height: 40px;
    background-color: var(--primary-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    margin-right: 20px;
    flex-shrink: 0;
}

.step-content h3 {
    font-size: 1.2rem;
    margin-bottom: 5px;
    color: var(--dark-color);
}

.step-content p {
    color: var(--gray);
    font-size: 0.95rem;
}

/* 评价样式 */
.testimonials {
    padding: 100px 0;
    background-color: var(--light-gray);
}

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

.testimonial-card {
    background-color: var(--white);
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.testimonial-content {
    font-style: italic;
    color: var(--gray);
    margin-bottom: 20px;
    position: relative;
}

.testimonial-content::before {
    content: '"';
    font-size: 3rem;
    color: var(--primary-color);
    opacity: 0.2;
    position: absolute;
    top: -15px;
    left: -10px;
}

.testimonial-author {
    display: flex;
    align-items: center;
}

.testimonial-author img {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    margin-right: 15px;
    object-fit: cover;
}

.author-info h4 {
    font-size: 1.1rem;
    margin-bottom: 5px;
    color: var(--dark-color);
}

.author-info p {
    font-size: 0.9rem;
    color: var(--gray);
}

/* 联系样式 */
.contact {
    padding: 100px 0;
    background-color: var(--white);
}

.contact .container {
    display: flex;
    gap: 50px;
}

.contact-info {
    flex: 1;
}

.contact-form {
    flex: 1;
}

.info-item {
    display: flex;
    margin-bottom: 30px;
}

.info-icon {
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    margin-right: 20px;
    flex-shrink: 0;
}

.info-content h3 {
    font-size: 1.2rem;
    margin-bottom: 5px;
    color: var(--dark-color);
}

.info-content p {
    color: var(--gray);
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 30px;
}

.social-links a {
    width: 40px;
    height: 40px;
    background-color: var(--light-gray);
    color: var(--gray);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background-color: var(--primary-color);
    color: var(--white);
}

.form-group {
    margin-bottom: 20px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--light-gray);
    border-radius: 5px;
    font-family: inherit;
    font-size: 0.95rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* 页脚样式 */
footer {
    background-color: var(--dark-color);
    color: var(--white);
    padding: 80px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-about h3,
.footer-links h3,
.footer-products h3,
.footer-newsletter h3 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-about h3::after,
.footer-links h3::after,
.footer-products h3::after,
.footer-newsletter h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 2px;
    background-color: var(--primary-color);
}

.footer-about p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
    line-height: 1.7;
}

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

.footer-links ul li a,
.footer-products ul li a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
    transition: color 0.3s ease;
}

.footer-links ul li a:hover,
.footer-products ul li a:hover {
    color: var(--primary-color);
}

.footer-newsletter p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
    margin-bottom: 20px;
}

.footer-newsletter form {
    display: flex;
}

.footer-newsletter input {
    flex: 1;
    padding: 10px 15px;
    border: none;
    border-radius: 5px 0 0 5px;
    font-size: 0.95rem;
}

.footer-newsletter button {
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    padding: 0 15px;
    border-radius: 0 5px 5px 0;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.footer-newsletter button:hover {
    background-color: var(--primary-dark);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 20px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.copyright p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

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

.footer-legal a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.footer-legal a:hover {
    color: var(--primary-color);
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .banner-content h1 {
        font-size: 2.8rem;
    }
    
    .banner-subtitle {
        font-size: 1.2rem;
    }
}

@media (max-width: 992px) {
    .banner .container,
    .partner .container,
    .contact .container {
        flex-direction: column;
    }
    
    .banner-content,
    .partner-content,
    .contact-info {
        margin-bottom: 50px;
        text-align: center;
    }
    
    .banner-btns,
    .banner-stats {
        justify-content: center;
    }
    
    .partner-image,
    .banner-image {
        text-align: center;
    }
    
    .partner-steps {
        max-width: 500px
        
/* 移动端菜单样式 */
.menu-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--dark-color);
}

nav.active {
    display: block !important;
    position: absolute;
    top: 70px;
    left: 0;
    width: 100%;
    background-color: var(--white);
    box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
    padding: 20px;
}

nav.active ul {
    flex-direction: column;
}

nav.active ul li {
    margin: 10px 0;
}

/* 导航高亮样式 */
nav ul li a.active {
    color: var(--primary-color);
    font-weight: 600;
}

@media (max-width: 768px) {
    nav ul {
        display: none;
    }
    
    .menu-toggle {
        display: block;
    }
}