:root {
    --primary-color: #FF6B6B;  /* 獭獭橙红色 */
    --secondary-color: #4ECDC4;  /* 獭獭青色 */
    --primary-light: #FFB3B3;  /* 浅橙红色 */
    --secondary-light: #87E8DE;  /* 浅青色 */
    --text-color: #2D3748;  /* 深色文本 */
    --text-light: #718096;  /* 浅色文本 */
    --background: linear-gradient(135deg, #FFF5F5 0%, #F0FDFC 100%);  /* 背景渐变 */
    --shadow-color: rgba(255, 107, 107, 0.08);  /* 阴影颜色 */
}

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

body {
    font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
    line-height: 1.8;
    color: var(--text-color);
    background: var(--background);
    background-attachment: fixed;
    letter-spacing: 0.3px;
    min-height: 100vh;
}

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

/* 导航栏样式 */
.navbar {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px var(--shadow-color);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    padding: 1rem 20px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 24px;
}

.nav-links a {
    color: var(--text-color);
    text-decoration: none;
    font-size: 0.9rem;
    position: relative;
    padding-bottom: 2px;
    transition: color 0.3s ease;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    transition: width 0.3s ease;
}

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

/* 语言选择器样式 */
.language-selector select {
    appearance: none;
    background: transparent;
    border: 1px solid var(--primary-color);
    border-radius: 20px;
    padding: 5px 30px 5px 15px;
    font-size: 14px;
    color: var(--text-color);
    cursor: pointer;
    outline: none;
}

.language-selector::after {
    content: '▼';
    font-size: 12px;
    color: var(--primary-color);
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
}

.language-selector {
    position: relative;
    display: inline-block;
}

/* Hero区域样式 */
.hero {
    padding: 140px 0 80px;
    background: var(--background);
    text-align: center;
}

.hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 30px;
    margin-bottom: 60px;
}

.hero-text {
    text-align: center;
    max-width: 600px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero-app-icon {
    width: 80px;
    height: 80px;
    margin-bottom: 20px;
    border-radius: 20px;
    box-shadow: 0 15px 30px var(--shadow-color);
}

.hero-text h1 {
    font-size: 2.4rem;
    margin-bottom: 5px;
    color: #333333;
    font-weight: 600;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 700;
}

.subtitle {
    font-size: 1.5rem;
    color: var(--text-light);
    margin-bottom: 20px;
    font-weight: 500;
    letter-spacing: 0.5px;
    margin-top: 0;
}

.description {
    text-align: center;
    max-width: 500px;
    margin: 0 auto 30px;
    font-size: 1.1rem;
    line-height: 1.6;
}

.download-buttons {
    display: flex;
    gap: 25px;
    margin-top: 30px;
    justify-content: center;
    flex-wrap: wrap;
}

.download-button {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 12px 24px;
    border-radius: 14px;
    text-decoration: none;
    font-weight: 500;
    background-color: #000000;
    color: white;
    transition: all 0.2s ease;
    font-size: 1rem;
    min-width: 200px;
    justify-content: flex-start;
    position: relative;
    border: 1px solid transparent;
}

.download-button .button-icon {
    width: 24px;
    height: 24px;
    filter: brightness(0) invert(1);
    flex-shrink: 0;
}

.download-button::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    border-radius: 16px;
    z-index: -1;
    transition: all 0.2s ease;
    opacity: 0.7;
}

.download-button:hover {
    transform: translateY(-2px);
    background-color: #222222;
}

.download-button:hover::before {
    opacity: 1;
    top: -3px;
    left: -3px;
    right: -3px;
    bottom: -3px;
}

.download-button:nth-child(1)::before {
    background: linear-gradient(45deg, var(--primary-color), var(--primary-light));
}

.download-button:nth-child(2)::before {
    background: linear-gradient(45deg, var(--secondary-color), var(--secondary-light));
}

/* 功能特点样式 */
.features {
    padding: 80px 0;
    background: rgba(255, 255, 255, 0.5);
}

.features h2 {
    text-align: center;
    margin-bottom: 60px;
    font-weight: 600;
    font-size: 2.2rem;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    padding: 0 20px;
}

.feature-item {
    background: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.06);
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.8);
    position: relative;
    overflow: hidden;
}

.feature-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    opacity: 0.8;
    transition: all 0.3s ease;
}

.feature-item:nth-child(1)::before {
    background: linear-gradient(45deg, var(--primary-color), var(--primary-light));
}

.feature-item:nth-child(2)::before {
    background: linear-gradient(45deg, var(--secondary-color), var(--secondary-light));
}

.feature-item:nth-child(3)::before {
    background: linear-gradient(45deg, var(--primary-light), var(--secondary-color));
}

.feature-item:nth-child(4)::before {
    background: linear-gradient(45deg, var(--secondary-light), var(--primary-color));
}

.feature-item:nth-child(5)::before {
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-light));
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px var(--shadow-color);
}

.feature-item:hover::before {
    opacity: 1;
    width: 6px;
}

.feature-item h3 {
    color: var(--text-color);
    margin-bottom: 15px;
    font-size: 1.2rem;
    font-weight: 600;
    padding-left: 10px;
}

.feature-item p {
    color: var(--text-light);
    line-height: 1.6;
    font-size: 0.95rem;
    padding-left: 10px;
}


/* 联系我们区域 */
.contact {
    padding: 80px 0;
    background: rgba(255, 255, 255, 0.5);
}

.contact h2 {
    text-align: center;
    font-weight: 600;
    font-size: 2.2rem;
    margin-bottom: 40px;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.contact-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.contact-text p {
    font-size: 1.1rem;
    color: var(--text-color);
    margin-bottom: 20px;
    line-height: 1.6;
}

.contact-text a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

.contact-text a:hover {
    text-decoration: underline;
}

/* 页脚样式 */
footer {
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    padding: 40px 0;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.footer-content p {
    margin: 0;
    text-align: center;
    color: var(--text-light);
    font-size: 0.9rem;
}

/* 隐私政策页面样式 */
.privacy-content {
    padding: 140px 0 80px;
    min-height: calc(100vh - 200px);
    background: var(--background);
}

.privacy-text {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    box-shadow: 0 10px 30px var(--shadow-color);
    border: 1px solid rgba(255, 255, 255, 0.8);
}

.privacy-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-color);
    margin-bottom: 25px;
}

.privacy-content h1 {
    text-align: center;
    font-size: 2.4rem;
    margin-bottom: 40px;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 600;
}

.privacy-details h3 {
    color: var(--primary-color);
    font-size: 1.3rem;
    margin: 30px 0 15px 0;
    font-weight: 600;
}

.privacy-details ul {
    list-style: none;
    padding: 0;
    margin-bottom: 25px;
}

.privacy-details ul li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 8px;
    color: var(--text-color);
    line-height: 1.6;
}

.privacy-details ul li::before {
    content: '•';
    color: var(--secondary-color);
    position: absolute;
    left: 0;
    font-weight: bold;
}

.privacy-details a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

.privacy-details a:hover {
    text-decoration: underline;
}

.back-to-home {
    text-align: center;
    margin-top: 40px;
}

.back-to-home a {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 24px;
    background-color: #000000;
    color: white;
    text-decoration: none;
    border-radius: 14px;
    font-weight: 500;
    position: relative;
    transition: all 0.2s ease;
}

.back-to-home a::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    border-radius: 16px;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    z-index: -1;
    transition: all 0.2s ease;
    opacity: 0.7;
}

.back-to-home a:hover {
    transform: translateY(-2px);
    background-color: #222222;
}

.back-to-home a:hover::before {
    opacity: 1;
    top: -3px;
    left: -3px;
    right: -3px;
    bottom: -3px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero-text h1 {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 1.2rem;
    }
    
    .description {
        font-size: 1rem;
    }
    
    .download-buttons {
        flex-direction: column;
        align-items: center;
        gap: 15px;
    }
    
    .download-button {
        width: 100%;
        max-width: 280px;
    }
    
    .features, .contact {
        padding: 60px 0;
    }
    
    .features h2, .contact h2 {
        font-size: 1.8rem;
        margin-bottom: 40px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
        padding: 0 10px;
    }
    
    .feature-item {
        padding: 20px;
    }
    
    .nav-links {
        gap: 15px;
    }
    
    .nav-links a {
        font-size: 0.8rem;
    }
    
    /* 隐私政策页面响应式 */
    .privacy-content {
        padding: 100px 0 60px;
    }
    
    .privacy-text {
        margin: 0 10px;
        padding: 25px;
    }
    
    .privacy-content h1 {
        font-size: 2rem;
        margin-bottom: 30px;
    }
    
    .privacy-details h3 {
        font-size: 1.2rem;
    }
}