/* 基础样式设置 */
:root {
    --primary-color: #FF6B81;
    --primary-dark: #E84C61;
    --primary-light: #FFA0AE;
    --secondary-color: #5352ED;
    --secondary-dark: #3231CD;
    --secondary-light: #7271FF;
    --accent-color: #20BDFF;
    --dark-color: #1E1E2C;
    --light-color: #FFFFFF;
    --gray-color: #F8F9FA;
    --text-color: #333333;
    --text-light: #777777;
    --shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
    --border-radius: 8px;
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--gray-color);
    overflow-x: hidden;
}

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

ul, ol {
    list-style: none;
}

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

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--dark-color);
    position: relative;
    display: inline-block;
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 3px;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    border-radius: 3px;
}

.section-header p {
    color: var(--text-light);
    font-size: 1.1rem;
    max-width: 700px;
    margin: 0 auto;
}

.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 1rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.btn-primary {
    background: linear-gradient(45deg, var(--primary-color), var(--primary-dark));
    color: var(--light-color);
    box-shadow: 0 4px 15px rgba(255, 107, 129, 0.4);
}

.btn-primary:hover {
    background: linear-gradient(45deg, var(--primary-dark), var(--primary-color));
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(255, 107, 129, 0.5);
}

.btn-secondary {
    background: linear-gradient(45deg, var(--secondary-color), var(--secondary-dark));
    color: var(--light-color);
    box-shadow: 0 4px 15px rgba(83, 82, 237, 0.4);
}

.btn-secondary:hover {
    background: linear-gradient(45deg, var(--secondary-dark), var(--secondary-color));
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(83, 82, 237, 0.5);
}

/* 头部样式 */
#header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: var(--spacing-md) 0;
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.logo h1 {
    font-size: 1.8rem;
    font-weight: 700;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-fill-color: transparent;
}

.nav-menu ul {
    display: flex;
}

.nav-menu ul li {
    margin-left: var(--spacing-md);
}

.nav-menu ul li a {
    font-weight: 500;
    position: relative;
    padding: var(--spacing-xs) 0;
    color: var(--text-color);
    transition: var(--transition);
}

.nav-menu ul li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    transition: var(--transition);
}

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

.nav-menu ul li a:hover::after,
.nav-menu ul li a.active::after {
    width: 100%;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.menu-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--text-color);
    margin-bottom: 5px;
    border-radius: 3px;
    transition: var(--transition);
}

/* 首页区域样式 */
.hero-section {
    padding: 160px 0 100px;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.hero-content {
    max-width: 600px;
    margin-bottom: var(--spacing-xl);
}

.hero-content h2 {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--dark-color);
    animation: fadeInUp 1s ease;
}

.hero-content p {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 1.2s ease;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    animation: fadeInUp 1.4s ease;
}

.hero-image {
    position: absolute;
    right: -5%;
    top: 50%;
    transform: translateY(-50%);
    width: 45%;
    animation: floatImage 6s ease-in-out infinite;
    z-index: 2;
}

.hero-image img {
    border-radius: 20px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
}

.tech-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 10% 20%, rgba(255, 107, 129, 0.05) 0%, transparent 20%),
        radial-gradient(circle at 85% 60%, rgba(83, 82, 237, 0.05) 0%, transparent 30%);
    z-index: 1;
}

/* 功能特色样式 */
.features-section {
    padding: var(--spacing-xl) 0;
    background-color: var(--light-color);
    position: relative;
}

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

.feature-card {
    background: white;
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    z-index: 2;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(255, 107, 129, 0.1), rgba(83, 82, 237, 0.1));
}

.feature-icon img {
    width: 70%;
    height: 70%;
    object-fit: cover;
    border-radius: 50%;
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-sm);
    color: var(--dark-color);
}

.feature-card p {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* 下载应用样式 */
.download-section {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    position: relative;
}

.download-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-xl);
}

.download-info {
    flex: 1;
    padding-right: var(--spacing-xl);
}

.download-info h3 {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-md);
    color: var(--dark-color);
}

.download-benefits {
    margin-bottom: var(--spacing-lg);
}

.download-benefits li {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-sm);
    font-size: 1.1rem;
}

.download-benefits li span {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 50%;
    margin-right: var(--spacing-sm);
    font-size: 0.8rem;
}

.download-buttons {
    display: flex;
    gap: var(--spacing-md);
}

.btn-download {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: var(--border-radius);
    background: var(--dark-color);
    color: var(--light-color);
    transition: var(--transition);
}

.btn-download:hover {
    background: #000;
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.btn-download .icon {
    margin-right: var(--spacing-sm);
    font-size: 1.2rem;
}

.download-image {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

.download-image img {
    max-width: 80%;
    border-radius: 20px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
}

.download-steps {
    display: flex;
    justify-content: space-between;
    text-align: center;
}

.step {
    flex: 1;
    padding: var(--spacing-md);
}

.step-number {
    width: 40px;
    height: 40px;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-sm);
    font-weight: 700;
}

.step h4 {
    margin-bottom: var(--spacing-xs);
    color: var(--dark-color);
}

.step p {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* 用户评价样式 */
.testimonials-section {
    padding: var(--spacing-xl) 0;
    background-color: var(--light-color);
}

.testimonials-slider {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.testimonial-item {
    flex: 1;
    background: white;
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.testimonial-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.testimonial-content {
    margin-bottom: var(--spacing-md);
    position: relative;
}

.testimonial-content p {
    font-style: italic;
    color: var(--text-color);
    font-size: 1.05rem;
    line-height: 1.7;
}

.testimonial-content p::before,
.testimonial-content p::after {
    content: '"';
    font-size: 1.5rem;
    color: var(--primary-color);
}

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

.author-image {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    overflow: hidden;
    margin-right: var(--spacing-sm);
}

.author-info h4 {
    font-size: 1.1rem;
    margin-bottom: 2px;
    color: var(--dark-color);
}

.author-info p {
    font-size: 0.85rem;
    color: var(--text-light);
}

.testimonial-stats {
    display: flex;
    justify-content: space-around;
    text-align: center;
}

.stat-item h3 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 5px;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-fill-color: transparent;
}

.stat-item p {
    color: var(--text-light);
    font-size: 1rem;
}

/* 常见问题样式 */
.faq-section {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

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

.faq-item {
    background: white;
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-md);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.faq-question {
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    transition: var(--transition);
}

.faq-question:hover {
    background: rgba(0, 0, 0, 0.02);
}

.faq-question h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--dark-color);
}

.faq-toggle {
    font-size: 1.5rem;
    color: var(--primary-color);
    transition: var(--transition);
}

.faq-item.active .faq-toggle {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 var(--spacing-lg);
    max-height: 0;
    overflow: hidden;
    transition: var(--transition);
}

.faq-item.active .faq-answer {
    padding: 0 var(--spacing-lg) var(--spacing-md);
    max-height: 1000px;
}

.faq-answer p {
    color: var(--text-light);
    font-size: 1rem;
    line-height: 1.6;
}

/* 底部区域样式 */
#footer {
    background-color: var(--dark-color);
    color: var(--light-color);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-top {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-xl);
}

.footer-logo h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-fill-color: transparent;
}

.footer-logo p {
    color: rgba(255, 255, 255, 0.7);
    max-width: 300px;
}

.footer-links {
    display: flex;
    gap: var(--spacing-xl);
}

.link-group h4 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
    position: relative;
    display: inline-block;
}

.link-group h4::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 30px;
    height: 2px;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
}

.link-group ul li {
    margin-bottom: var(--spacing-xs);
}

.link-group ul li a {
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

.link-group ul li a:hover {
    color: var(--primary-color);
    padding-left: 5px;
}

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

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
}

.social-link {
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

.social-link:hover {
    color: var(--primary-color);
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes floatImage {
    0% {
        transform: translateY(-50%);
    }
    50% {
        transform: translateY(-53%);
    }
    100% {
        transform: translateY(-50%);
    }
}