/* 全局样式 */
:root {
    --primary-color: #f0b90b;
    --secondary-color: #1e2026;
    --text-color: #333;
    --light-text: #fff;
    --light-bg: #f8f9fa;
    --dark-bg: #0b0e11;
    --border-color: #e6e8ea;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #fff;
}

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

ul {
    list-style-type: none;
}

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

.section-header {
    text-align: center;
    margin-bottom: 40px;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
    color: var(--secondary-color);
}

.section-header p {
    color: #666;
    font-size: 1.1rem;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 10px 20px;
    background-color: var(--primary-color);
    color: var(--secondary-color);
    border: none;
    border-radius: var(--border-radius);
    font-weight: bold;
    cursor: pointer;
    transition: var(--transition);
}

.btn:hover {
    background-color: #e0aa0a;
    transform: translateY(-2px);
}

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

.btn-large {
    padding: 15px 30px;
    font-size: 1.2rem;
}

/* 导航栏样式 */
.navbar {
    background-color: var(--secondary-color);
    color: var(--light-text);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

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

.logo {
    font-size: 1.5rem;
    font-weight: bold;
}

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

.nav-links {
    display: flex;
}

.nav-links li {
    margin-left: 30px;
}

.nav-links a {
    color: var(--light-text);
    transition: var(--transition);
    position: relative;
    padding: 5px 0;
}

.nav-links a:hover, .nav-links a.active-nav {
    color: var(--primary-color);
}

.nav-links a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-links a:hover::after, .nav-links a.active-nav::after {
    width: 100%;
}

.mobile-menu {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* 英雄区域样式 */
.hero {
    background-color: var(--dark-bg);
    color: var(--light-text);
    padding: 80px 0;
}

.hero .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 30px;
}

.hero-content {
    flex: 1;
}

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

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

.hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    color: #b6b7b8;
}

.highlight {
    color: var(--primary-color);
    font-weight: bold;
}

.referral-code-box {
    background-color: rgba(255, 255, 255, 0.1);
    padding: 20px;
    border-radius: var(--border-radius);
    margin-bottom: 30px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 15px;
}

.referral-code-box h2 {
    font-size: 1.5rem;
    margin: 0;
}

#referral-code {
    color: var(--primary-color);
    font-weight: bold;
    letter-spacing: 1px;
}

/* 特性区域样式 */
.features {
    padding: 80px 0;
    background-color: var(--light-bg);
}

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

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

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

.feature-card i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

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

/* 福利区域样式 */
.benefits {
    padding: 80px 0;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.benefit-card {
    display: flex;
    background-color: var(--light-bg);
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.benefit-icon {
    margin-right: 20px;
    font-size: 2.5rem;
    color: var(--primary-color);
    flex-shrink: 0;
}

.benefit-content h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
}

/* 使用指南样式 */
.how-to-use {
    padding: 80px 0;
    background-color: var(--light-bg);
}

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

.step {
    display: flex;
    margin-bottom: 30px;
    align-items: flex-start;
}

.step:last-child {
    margin-bottom: 50px;
}

.step-number {
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: var(--secondary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    margin-right: 20px;
    flex-shrink: 0;
}

.step-content h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
}

.cta-container {
    text-align: center;
    margin-top: 40px;
}

/* FAQ样式 */
.faq {
    padding: 80px 0;
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.faq-question {
    padding: 20px;
    background-color: var(--light-bg);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-question h3 {
    font-size: 1.2rem;
    margin: 0;
}

.faq-answer {
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    padding: 20px;
    max-height: 200px;
}

.faq-item.active .fa-chevron-down {
    transform: rotate(180deg);
}

.fa-chevron-down {
    transition: transform 0.3s ease;
}

/* 用户评价样式 */
.testimonials {
    padding: 80px 0;
    background-color: var(--light-bg);
}

.testimonials-slider {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    overflow: hidden;
}

.testimonial {
    background-color: #fff;
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--shadow);
    margin: 10px;
}

.testimonial-content {
    margin-bottom: 20px;
}

.testimonial-content p {
    font-style: italic;
    font-size: 1.1rem;
}

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

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

.author-info h4 {
    margin: 0;
    font-size: 1.1rem;
}

.author-info p {
    color: #666;
    margin: 5px 0 0;
}

.slider-controls {
    display: flex;
    justify-content: center;
    margin-top: 30px;
}

.slider-controls button {
    background-color: var(--secondary-color);
    color: #fff;
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    margin: 0 10px;
    cursor: pointer;
    transition: var(--transition);
}

.slider-controls button:hover {
    background-color: var(--primary-color);
}

/* 分享区域样式 */
.share {
    padding: 80px 0;
}

.share-container {
    max-width: 600px;
    margin: 0 auto;
    background-color: var(--light-bg);
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--shadow);
}

.share-code {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 30px;
    flex-wrap: wrap;
    gap: 15px;
}

.share-code p {
    font-size: 1.2rem;
}

#share-referral-code {
    font-weight: bold;
    color: var(--primary-color);
}

.social-share p {
    margin-bottom: 15px;
}

.social-icons {
    display: flex;
    gap: 15px;
}

.social-icons a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background-color: var(--secondary-color);
    color: #fff;
    border-radius: 50%;
    font-size: 1.5rem;
    transition: var(--transition);
}

.social-icons a:hover {
    background-color: var(--primary-color);
    transform: translateY(-5px);
}

/* CTA区域样式 */
.cta {
    background-color: var(--secondary-color);
    color: var(--light-text);
    padding: 80px 0;
    text-align: center;
}

.cta h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.cta p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* 页脚样式 */
.footer {
    background-color: var(--dark-bg);
    color: var(--light-text);
    padding: 60px 0 30px;
}

/* 友情链接样式 */
.friend-links {
    padding: 80px 0;
    background-color: var(--light-bg);
}

.friend-links-container {
    max-width: 1000px;
    margin: 0 auto;
}

.friend-links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
}

.friend-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background-color: #fff;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
}

.friend-link:hover {
    transform: translateY(-5px);
    background-color: var(--primary-color);
    color: var(--secondary-color);
}

.friend-link i {
    font-size: 2rem;
    margin-bottom: 10px;
    color: var(--secondary-color);
}

.friend-link:hover i {
    color: var(--secondary-color);
}

.friend-link span {
    font-weight: 500;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    margin-bottom: 40px;
    flex-wrap: wrap;
    gap: 30px;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 20px;
}

.footer-links {
    display: flex;
    gap: 60px;
    flex-wrap: wrap;
}

.footer-column h3 {
    color: var(--primary-color);
    margin-bottom: 20px;
    font-size: 1.2rem;
}

.footer-column ul li {
    margin-bottom: 10px;
}

.footer-column ul li a {
    color: #b6b7b8;
    transition: var(--transition);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: #b6b7b8;
    font-size: 0.9rem;
    margin-bottom: 10px;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .hero .container {
        flex-direction: column;
    }

    .hero-content, .hero-image {
        text-align: center;
    }

    .referral-code-box {
        justify-content: center;
    }

    .benefit-card {
        flex-direction: column;
        text-align: center;
    }

    .benefit-icon {
        margin-right: 0;
        margin-bottom: 15px;
    }

    .footer-content {
        flex-direction: column;
    }
    
    .friend-links-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .mobile-menu {
        display: block;
    }

    .mobile-menu.active + .nav-links {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background-color: var(--secondary-color);
        padding: 20px;
        z-index: 1000;
    }

    .mobile-menu.active + .nav-links li {
        margin: 10px 0;
    }

    .step {
        flex-direction: column;
        text-align: center;
    }

    .step-number {
        margin: 0 auto 15px;
    }

    .features-grid, .benefits-grid {
        grid-template-columns: 1fr;
    }
    
    .friend-links-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .section-header p {
        font-size: 1rem;
    }
    
    .social-icons {
        justify-content: center;
    }
    
    .share-code {
        justify-content: center;
        text-align: center;
    }
}

@media (max-width: 576px) {
    .hero h1 {
        font-size: 2.2rem;
    }

    .section-header h2 {
        font-size: 1.8rem;
    }

    .cta h2 {
        font-size: 1.8rem;
    }
    
    .friend-links-grid {
        grid-template-columns: 1fr;
    }
    
    .referral-code-box {
        flex-direction: column;
        align-items: center;
    }
    
    .footer-links {
        gap: 30px;
    }
    
    .hero {
        padding: 50px 0;
    }
    
    .features, .benefits, .how-to-use, .faq, .testimonials, .share, .friend-links, .cta {
        padding: 50px 0;
    }
    
    .social-icons {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .social-icons a {
        margin-bottom: 10px;
    }
    
    .testimonial-author {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .testimonial-author img {
        margin: 0 0 10px 0;
    }
}

/* 触摸设备优化 */
@media (hover: none) {
    .btn:hover {
        transform: none;
    }
    
    .feature-card:hover, .benefit-card:hover, .friend-link:hover {
        transform: none;
    }
    
    .social-icons a:hover {
        transform: none;
    }
}

/* 语言切换下拉菜单 */
.language-dropdown {
    position: relative;
}

.current-language {
    display: flex;
    align-items: center;
    gap: 5px;
    cursor: pointer;
}

.language-menu {
    position: absolute;
    top: 100%;
    right: 0;
    background-color: var(--secondary-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 10px 0;
    min-width: 150px;
    z-index: 1001;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
}

.language-dropdown.active .language-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.language-menu li {
    margin: 0;
    padding: 0;
}

.language-menu li a {
    display: block;
    padding: 8px 15px;
    color: var(--light-text);
    transition: var(--transition);
}

.language-menu li a:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--primary-color);
}