/* 全局样式 */
:root {
    --primary-color: #4285f4;
    --secondary-color: #34a853;
    --dark-color: #202124;
    --light-color: #f8f9fa;
    --gray-color: #70757a;
    --border-radius: 8px;
    --box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    background-color: var(--light-color);
    overflow-x: hidden;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

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

ul {
    list-style: none;
}

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

.section-title {
    text-align: center;
    margin-bottom: 3rem;
    font-size: 2.5rem;
    color: var(--dark-color);
    position: relative;
    padding-bottom: 1rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--primary-color);
    border-radius: 2px;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    padding: 12px 24px;
    border-radius: var(--border-radius);
    font-weight: 600;
    display: inline-block;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.btn-primary:hover {
    background-color: #3367d6;
    transform: translateY(-2px);
    box-shadow: var(--box-shadow);
}

/* 头部样式 */
header {
    background-color: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 1rem 0;
}

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

.logo {
    display: flex;
    align-items: center;
}

.logo img {
    width: 40px;
    height: 40px;
    margin-right: 10px;
}

.logo h1 {
    font-size: 1.5rem;
    color: var(--primary-color);
}

nav ul {
    display: flex;
}

nav ul li {
    margin-left: 1.5rem;
}

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

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

/* 英雄区域样式 */
.hero {
    padding: 6rem 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

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

.hero-content {
    flex: 1;
    padding-right: 2rem;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--dark-color);
}

.hero-content p {
    font-size: 1.2rem;
    color: var(--gray-color);
    margin-bottom: 2rem;
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
}

.hero-image img {
    max-height: 500px;
    filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.15));
    transform: perspective(800px) rotateY(-15deg);
    transition: var(--transition);
}

.hero-image img:hover {
    transform: perspective(800px) rotateY(-5deg) translateY(-10px);
}

/* 系统简介区域样式 */
.about {
    padding: 6rem 0;
    background-color: #f8f9fa;
}

.about-content {
    display: flex;
    flex-wrap: wrap;
    gap: 3rem;
}

.about-text {
    flex: 1;
    min-width: 300px;
}

.about-text h3 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.about-text h4 {
    font-size: 1.3rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
    font-weight: 500;
}

.about-text .developer {
    font-size: 1rem;
    color: var(--gray-color);
    margin-bottom: 1.5rem;
}

.about-desc {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
    text-align: justify;
}

.about-features {
    flex: 1;
    min-width: 300px;
}

.about-feature-group {
    margin-bottom: 2rem;
}

.about-feature-group h4 {
    font-size: 1.5rem;
    color: var(--dark-color);
    margin-bottom: 1.2rem;
    position: relative;
    padding-bottom: 0.5rem;
}

.about-feature-group h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 1.5px;
}

.about-features ul {
    padding-left: 1rem;
}

.about-features ul li {
    margin-bottom: 1.5rem;
}

.about-features ul li strong {
    display: block;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.about-features ul li p {
    font-size: 1rem;
    color: var(--gray-color);
    line-height: 1.6;
}

.advantages li {
    display: flex;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.advantages li i {
    color: var(--secondary-color);
    margin-right: 0.5rem;
    font-size: 1.1rem;
    margin-top: 0.2rem;
}

.about-target {
    background-color: white;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.about-target h4 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--dark-color);
}

.about-target p {
    font-size: 1rem;
    color: var(--gray-color);
    margin-bottom: 1rem;
}

.slogan {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--primary-color);
    text-align: center;
    padding: 1rem 0;
    border-top: 1px dashed #e0e0e0;
}

/* 下载按钮样式 */
.download-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.download-btn {
    display: flex;
    align-items: center;
    background-color: var(--dark-color);
    color: white;
    padding: 10px 20px;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.download-btn:hover {
    background-color: #000;
    transform: translateY(-2px);
    box-shadow: var(--box-shadow);
}

.download-btn i {
    font-size: 2rem;
    margin-right: 10px;
}

.download-btn span {
    display: flex;
    flex-direction: column;
}

.download-btn small {
    font-size: 0.7rem;
    opacity: 0.8;
}

.app-version {
    display: flex;
    gap: 1.5rem;
    color: var(--gray-color);
    font-size: 0.9rem;
}

/* 功能区域样式 */
.features {
    padding: 6rem 0;
    background-color: white;
}

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

.feature-item {
    text-align: center;
    padding: 2rem;
    border-radius: var(--border-radius);
    background-color: var(--light-color);
    transition: var(--transition);
}

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

.feature-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 1.5rem;
    background-color: rgba(66, 133, 244, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-icon i {
    font-size: 1.8rem;
    color: var(--primary-color);
}

.feature-item h3 {
    margin-bottom: 1rem;
    color: var(--dark-color);
}

.feature-item p {
    color: var(--gray-color);
}

/* 截图区域样式 */
.screenshots {
    padding: 6rem 0;
    background-color: var(--light-color);
}

.screenshot-slider {
    display: flex;
    gap: 1.5rem;
    overflow-x: auto;
    padding: 1rem 0;
    scroll-behavior: smooth;
    -ms-overflow-style: none;
    scrollbar-width: none;
}

.screenshot-slider::-webkit-scrollbar {
    display: none;
}

.screenshot-item {
    min-width: 280px;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.screenshot-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.screenshot-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.slider-controls {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
}

.prev-btn, .next-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: white;
    border: 1px solid #e0e0e0;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}

.prev-btn:hover, .next-btn:hover {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* 评价区域样式 */
.reviews {
    padding: 6rem 0;
    background-color: white;
}

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.review-item {
    background-color: var(--light-color);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.review-item:hover {
    transform: translateY(-5px);
}

.review-stars {
    color: #ffc107;
    margin-bottom: 1rem;
}

.review-text {
    font-style: italic;
    margin-bottom: 1rem;
    color: var(--dark-color);
}

.reviewer {
    display: flex;
    align-items: center;
}

.reviewer-name {
    font-weight: 600;
    color: var(--dark-color);
}

.average-rating {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 2rem;
    background-color: var(--light-color);
    border-radius: var(--border-radius);
    max-width: 400px;
    margin: 0 auto;
}

.rating-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
}

.rating-stars {
    color: #ffc107;
    margin: 0.5rem 0;
}

.rating-count {
    color: var(--gray-color);
}

/* 行动号召区域样式 */
.cta {
    padding: 6rem 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
}

.cta h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.cta p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

/* 页脚样式 */
footer {
    background-color: var(--dark-color);
    color: white;
    padding: 4rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.footer-logo {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.footer-logo img {
    width: 40px;
    height: 40px;
    margin-bottom: 1rem;
}

.footer-logo h3 {
    color: white;
}

.footer-links h4, .footer-social h4 {
    color: white;
    margin-bottom: 1.5rem;
    position: relative;
    padding-bottom: 0.5rem;
}

.footer-links h4::after, .footer-social h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background: var(--primary-color);
}

.footer-links ul li {
    margin-bottom: 0.8rem;
}

.footer-links ul li a {
    color: rgba(255, 255, 255, 0.7);
}

.footer-links ul li a:hover {
    color: white;
}

.social-icons {
    display: flex;
    gap: 1rem;
}

.social-icons a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transition: var(--transition);
}

.social-icons a:hover {
    background-color: var(--primary-color);
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

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

/* 响应式设计 */
@media (max-width: 992px) {
    .hero .container {
        flex-direction: column;
    }
    
    .hero-content {
        padding-right: 0;
        margin-bottom: 3rem;
        text-align: center;
    }
    
    .download-buttons {
        justify-content: center;
    }
    
    .app-version {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .about-content {
        flex-direction: column;
    }
}

@media (max-width: 768px) {
    header .container {
        flex-direction: column;
    }
    
    nav {
        margin-top: 1rem;
    }
    
    nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    nav ul li {
        margin: 0.5rem;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
}

@media (max-width: 576px) {
    .download-buttons {
        flex-direction: column;
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .feature-item {
        padding: 1.5rem;
    }
    
    .review-item {
        padding: 1.5rem;
    }
}

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

.feature-item.animated,
.screenshot-item.animated,
.review-item.animated {
    animation: fadeInUp 0.6s ease forwards;
}

/* 移动端菜单样式 */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--dark-color);
    cursor: pointer;
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: block;
    }
    
    nav {
        width: 100%;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }
    
    nav.active {
        max-height: 300px;
    }
    
    nav ul {
        flex-direction: column;
        align-items: center;
    }
    
    nav ul li {
        margin: 0.8rem 0;
    }
}

/* 为截图添加初始透明度 */
.feature-item,
.screenshot-item,
.review-item {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.about-text,
.about-feature-group,
.about-target {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.feature-item.animated,
.screenshot-item.animated,
.review-item.animated,
.about-text.animated,
.about-feature-group.animated,
.about-target.animated {
    opacity: 1;
    transform: translateY(0);
}

/* 添加二维码下载区域样式 */
.qr-download {
    display: flex;
    justify-content: center;
    margin-top: 2rem;
    gap: 2rem;
}

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

.qr-item img {
    width: 150px;
    height: 150px;
    border: 1px solid #e0e0e0;
    border-radius: var(--border-radius);
    padding: 10px;
    background-color: white;
    margin-bottom: 1rem;
}

.qr-item p {
    font-weight: 500;
    color: white;
}