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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

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

/* 导航栏 */
.navbar {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 1rem 0;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    color: white;
    font-size: 1.5rem;
    font-weight: bold;
}

.nav-logo i {
    margin-right: 10px;
    font-size: 2rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    align-items: center;
}

.nav-menu li {
    margin-left: 2rem;
}

.nav-menu a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-menu a:hover {
    color: #ffd700;
}

.nav-btn {
    background: rgba(255,255,255,0.2);
    padding: 0.5rem 1rem;
    border-radius: 25px;
    border: 1px solid rgba(255,255,255,0.3);
    transition: all 0.3s ease;
}

.nav-btn:hover {
    background: rgba(255,255,255,0.3);
    transform: translateY(-2px);
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: transparent;
    color: #667eea;
    border: 2px solid #667eea;
}

.btn-secondary:hover {
    background: #667eea;
    color: white;
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: #667eea;
    border: 2px solid #667eea;
}

.btn-outline:hover {
    background: #667eea;
    color: white;
}

.btn-full {
    width: 100%;
}

/* 英雄区域 */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 120px 0 80px;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 2rem;
    font-weight: 700;
}

.hero-features {
    display: flex;
    gap: 2rem;
    margin-bottom: 3rem;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.1rem;
}

.free-badge {
    background: #ffd700;
    color: #333;
    padding: 0.2rem 0.5rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: bold;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.device-mockup {
    position: relative;
    width: 300px;
    height: 300px;
}

.laptop {
    position: absolute;
    width: 200px;
    height: 120px;
    background: #333;
    border-radius: 10px;
    top: 50px;
    left: 50px;
}

.screen {
    width: 180px;
    height: 100px;
    background: #fff;
    margin: 10px;
    border-radius: 5px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.vpn-toggle {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    position: relative;
}

.vpn-toggle::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    background: white;
    border-radius: 50%;
}

.phone {
    position: absolute;
    width: 80px;
    height: 140px;
    background: #333;
    border-radius: 20px;
    top: 20px;
    right: 50px;
}

.phone .screen {
    width: 70px;
    height: 120px;
    margin: 10px 5px;
}

/* 全球应用区域 */
.global-apps {
    padding: 80px 0;
    background: white;
}

.global-apps h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #333;
}

.apps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 2rem;
    max-width: 800px;
    margin: 0 auto;
}

.app-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
    margin: 0 auto;
    transition: transform 0.3s ease;
}

.app-icon:hover {
    transform: scale(1.1);
}

/* 功能区域 */
.features {
    padding: 80px 0;
    background: #f8f9fa;
}

.feature-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    margin-bottom: 4rem;
}

.feature-card.reverse {
    direction: rtl;
}

.feature-card.reverse > * {
    direction: ltr;
}

.feature-content h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: #333;
}

.feature-content p {
    font-size: 1.1rem;
    color: #666;
    line-height: 1.8;
}

.feature-image {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 300px;
}

/* 用户评价 */
.testimonials {
    padding: 80px 0;
    background: white;
}

.testimonials h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #333;
}

.testimonial-carousel {
    display: flex;
    gap: 2rem;
    overflow-x: auto;
    padding: 1rem 0;
}

.testimonial-item {
    min-width: 300px;
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.user-avatar {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    margin-bottom: 1rem;
}

.user-name {
    font-weight: 600;
    color: #333;
    margin-bottom: 0.5rem;
}

.user-review {
    color: #666;
    font-style: italic;
}

/* 下载区域 */
.download {
    padding: 80px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.download h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    max-width: 800px;
    margin: 0 auto;
}

.download-card {
    background: rgba(255,255,255,0.1);
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    text-decoration: none;
    color: white;
    transition: all 0.3s ease;
    border: 1px solid rgba(255,255,255,0.2);
}

.download-card:hover {
    background: rgba(255,255,255,0.2);
    transform: translateY(-5px);
}

.download-card i {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.download-card span {
    font-size: 1.2rem;
    font-weight: 600;
}

/* 原生下载卡片样式 - 避开JS处理 */
.download-card-native {
    background: rgba(255,255,255,0.1) !important;
    padding: 2rem !important;
    border-radius: 15px !important;
    text-align: center !important;
    text-decoration: none !important;
    color: white !important;
    transition: all 0.3s ease !important;
    border: 1px solid rgba(255,255,255,0.2) !important;
    display: block !important;
    min-height: 120px !important;
    box-sizing: border-box !important;
}

.download-card-native:hover {
    background: rgba(255,255,255,0.2) !important;
    transform: translateY(-5px) !important;
    color: white !important;
    text-decoration: none !important;
}

.download-card-native:visited {
    color: white !important;
    text-decoration: none !important;
}

.download-card-native:link {
    color: white !important;
    text-decoration: none !important;
}

.download-card-native i {
    font-size: 3rem !important;
    margin-bottom: 1rem !important;
    display: block !important;
    color: white !important;
}

.download-card-native span {
    font-size: 1.2rem !important;
    font-weight: 600 !important;
    display: block !important;
    color: white !important;
}

/* 页脚 */
.footer {
    background: #333;
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.footer-section h4 {
    margin-bottom: 1rem;
    color: #ffd700;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

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

.footer-section a:hover {
    color: #ffd700;
}

.footer-logo {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
}

.footer-logo i {
    margin-right: 10px;
    font-size: 1.5rem;
}

/* 认证页面样式 */
.auth-page {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.auth-container {
    width: 100%;
    max-width: 400px;
}

.auth-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

.auth-logo {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-logo i {
    font-size: 3rem;
    color: #667eea;
}

.auth-card h1 {
    text-align: center;
    margin-bottom: 2rem;
    color: #333;
}

.auth-tabs {
    display: flex;
    margin-bottom: 2rem;
    border-bottom: 1px solid #eee;
}

.tab-btn {
    flex: 1;
    padding: 1rem;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    color: #666;
    transition: all 0.3s ease;
}

.tab-btn.active {
    color: #667eea;
    border-bottom: 2px solid #667eea;
}

.auth-form {
    display: block;
}

.auth-form.hidden {
    display: none;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: #333;
    font-weight: 500;
}

.form-group input {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: #667eea;
}

.password-row {
    display: flex;
    gap: 1rem;
    align-items: flex-end;
}

.password-row input {
    flex: 1;
}

.forgot-password {
    color: #667eea;
    text-decoration: none;
    font-size: 0.9rem;
    white-space: nowrap;
}

.code-row {
    display: flex;
    gap: 1rem;
    align-items: flex-end;
}

.code-row input {
    flex: 1;
}

.code-btn {
    padding: 12px 20px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    white-space: nowrap;
}

.code-display {
    color: #667eea;
    font-weight: bold;
    margin-left: 10px;
    font-size: 14px;
}

.code-btn:disabled {
    background: #ccc;
    cursor: not-allowed;
}

.checkbox-group {
    display: flex;
    align-items: center;
}

.checkbox-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-size: 0.9rem;
    color: #666;
}

.checkbox-label input[type="checkbox"] {
    width: auto;
    margin-right: 0.5rem;
}

.auth-footer {
    text-align: center;
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid #eee;
}

.auth-footer a {
    color: #667eea;
    text-decoration: none;
}

/* 定价页面样式 */
.pricing {
    padding: 120px 0 80px;
    background: white;
}

.pricing h1 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #333;
}

.pricing-carousel {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: #667eea;
    color: white;
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
    z-index: 10;
}

.carousel-btn.prev {
    left: -25px;
}

.carousel-btn.next {
    right: -25px;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    padding: 0 20px;
}

.pricing-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    text-align: center;
    position: relative;
    transition: transform 0.3s ease;
}

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

.pricing-card.featured {
    border: 2px solid #667eea;
    transform: scale(1.05);
}

.discount-badge {
    position: absolute;
    top: -10px;
    right: 20px;
    background: #ff4757;
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: bold;
}

.pricing-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #333;
}

.price {
    margin-bottom: 2rem;
}

.amount {
    font-size: 2.5rem;
    font-weight: bold;
    color: #ff4757;
}

.original-price {
    text-decoration: line-through;
    color: #999;
    margin-left: 0.5rem;
}

.features-list {
    list-style: none;
    margin-bottom: 2rem;
}

.features-list li {
    padding: 0.5rem 0;
    color: #666;
}

.features-list i {
    color: #28a745;
    margin-right: 0.5rem;
}

/* 帮助中心样式 */
.help-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 120px 0 60px;
    text-align: center;
}

.help-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    font-size: 1.5rem;
    font-weight: bold;
}

.help-logo i {
    margin-right: 10px;
    font-size: 2rem;
}

.help-header h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.help-content {
    padding: 60px 0;
    background: white;
}

.help-section {
    margin-bottom: 3rem;
}

.help-section h2 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    color: #333;
    border-bottom: 2px solid #667eea;
    padding-bottom: 0.5rem;
}

.help-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.help-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: #f8f9fa;
    border-radius: 8px;
    text-decoration: none;
    color: #333;
    transition: all 0.3s ease;
}

.help-item:hover {
    background: #667eea;
    color: white;
    transform: translateX(5px);
}

/* 政策页面样式 */
.policy-content, .terms-content {
    padding: 120px 0 60px;
    background: white;
}

.policy-header, .terms-header {
    text-align: center;
    margin-bottom: 3rem;
}

.policy-header h1, .terms-header h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #333;
}

.policy-intro, .terms-intro {
    font-size: 1.1rem;
    color: #666;
    line-height: 1.8;
    margin-bottom: 1rem;
}

.terms-date {
    color: #999;
    font-style: italic;
}

.policy-section, .terms-section {
    margin-bottom: 2rem;
}

.policy-section h2, .terms-section h2 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #333;
}

.terms-section h3 {
    font-size: 1.2rem;
    margin: 1rem 0 0.5rem;
    color: #333;
}

.policy-section p, .terms-section p {
    margin-bottom: 1rem;
    line-height: 1.8;
    color: #666;
}

.policy-section ul, .terms-section ul {
    margin-left: 2rem;
    margin-bottom: 1rem;
}

.policy-section li, .terms-section li {
    margin-bottom: 0.5rem;
    line-height: 1.6;
    color: #666;
}

.policy-footer, .terms-footer {
    text-align: center;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid #eee;
    color: #999;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .hero-features {
        flex-direction: column;
        gap: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .feature-card {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .feature-card.reverse {
        direction: ltr;
    }
    
    .download-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
    }
    
    .pricing-card.featured {
        transform: none;
    }
    
    .carousel-btn {
        display: none;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
    
    .auth-card {
        padding: 1.5rem;
    }
    
    .password-row, .code-row {
        flex-direction: column;
        gap: 0.5rem;
    }
}