/* 全局样式 */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;700&display=swap');

:root {
    --primary-color: #4299E1;
    --secondary-color: #F6AD55;
    --background-color: #F0F9FF;
    --text-color: #2D3748;
    --light-text: #718096;
    --gradient-start: #F6AD55;
    --gradient-end: #4299E1;
    --shadow-color: rgba(66, 153, 225, 0.15);
    --card-bg: #FFFFFF;
}

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

body {
    font-family: 'Noto Sans SC', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

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

h1, h2, h3 {
    font-weight: 700;
    line-height: 1.3;
}

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

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

section {
    padding: 60px 0;
    text-align: center;
}

/* 顶部波浪装饰 */
.wave-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 200px;
    overflow: hidden;
    z-index: -1;
}

.wave {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
    border-radius: 0 0 50% 50% / 30%;
}

/* 应用头部 */
.app-header {
    padding-top: 120px;
    text-align: center;
    margin-bottom: 30px;
}

.logo-container {
    margin: 0 auto 20px;
    width: 120px;
    height: 120px;
    position: relative;
}

.app-logo {
    width: 100%;
    height: 100%;
    object-fit: contain;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-15px);
    }
    100% {
        transform: translateY(0px);
    }
}

.app-title {
    font-size: 3rem;
    margin-bottom: 20px;
    color: var(--primary-color);
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.1);
}

.app-description {
    font-size: 1.4rem;
    max-width: 600px;
    margin: 0 auto;
    color: var(--light-text);
}

/* 手机模型 */
.phone-mockup {
    text-align: center;
    margin: 20px 0 40px;
}

.mockup-image {
    max-height: 500px;
    filter: drop-shadow(0 10px 20px var(--shadow-color));
    transform: perspective(1000px) rotateY(-5deg);
    transition: transform 0.5s ease;
}

.mockup-image:hover {
    transform: perspective(1000px) rotateY(0deg);
}

/* 功能特点 */
.features h2 {
    font-size: 2rem;
    margin-bottom: 40px;
    color: var(--primary-color);
}

.feature-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.feature-item {
    background-color: var(--card-bg);
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 10px 20px var(--shadow-color);
    transition: transform 0.3s ease;
    text-align: left;
    display: flex;
    flex-direction: column;
}

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

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.feature-text h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
    color: var(--primary-color);
}

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

/* 下载区域 */
.download-section {
    background: linear-gradient(135deg, rgba(246, 173, 85, 0.1) 0%, rgba(66, 153, 225, 0.1) 100%);
    border-radius: 20px;
    padding: 60px 30px;
    margin: 40px auto;
}

.download-section h2 {
    font-size: 2.2rem;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.download-section p {
    color: var(--light-text);
    margin-bottom: 30px;
    font-size: 1.2rem;
}

.download-buttons {
    display: flex;
    justify-content: center;
    margin-bottom: 40px;
}

.download-btn {
    display: flex;
    align-items: center;
    background: linear-gradient(90deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
    color: white;
    padding: 18px 35px;
    border-radius: 50px;
    font-weight: 500;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.download-btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
}

.download-btn i {
    font-size: 2rem;
    margin-right: 15px;
}

.download-btn span {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    line-height: 1.2;
}

.download-btn small {
    font-size: 0.9rem;
    opacity: 0.9;
}

.qr-code {
    margin-top: 30px;
}

.qr-image {
    width: 150px;
    height: 150px;
    padding: 10px;
    background-color: white;
    border-radius: 10px;
    margin-bottom: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.qr-code p {
    margin-top: 10px;
    font-size: 0.9rem;
    color: var(--light-text);
}

/* 应用描述部分 */
.app-description-section {
    padding: 60px 20px;
    text-align: center;
}

.description-content {
    max-width: 900px;
    margin: 0 auto;
}

.app-description-section h2 {
    color: var(--primary-color);
    font-size: 2.2rem;
    margin-bottom: 20px;
}

.app-description-section > .description-content > p {
    font-size: 1.1rem;
    color: var(--text-color);
    margin-bottom: 30px;
    line-height: 1.8;
}

.description-details {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 30px;
    margin: 40px 0;
}

.description-item {
    flex: 1;
    min-width: 280px;
    background-color: var(--card-bg);
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 5px 15px var(--shadow-color);
    text-align: left;
    transition: transform 0.3s ease;
}

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

.description-item i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.description-item h3 {
    font-size: 1.4rem;
    color: var(--primary-color);
    margin-bottom: 10px;
}

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

.version-info {
    font-size: 0.9rem;
    color: var(--light-text);
    margin-top: 30px;
    font-style: italic;
}

/* 用户评价 */
.testimonials h2 {
    font-size: 2rem;
    margin-bottom: 40px;
    color: var(--primary-color);
}

.testimonial-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.testimonial-item {
    background-color: var(--card-bg);
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 10px 20px var(--shadow-color);
    text-align: left;
}

.rating {
    color: var(--secondary-color);
    font-size: 1.2rem;
    margin-bottom: 15px;
}

.testimonial-text {
    font-style: italic;
    margin-bottom: 15px;
    color: var(--text-color);
}

.testimonial-author {
    font-weight: 500;
    color: var(--light-text);
    text-align: right;
}

/* 页脚 */
.app-footer {
    background-color: var(--primary-color);
    color: white;
    padding: 30px 0;
    margin-top: 60px;
    border-radius: 20px 20px 0 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 30px;
    flex-wrap: wrap;
    gap: 20px;
}

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

.social-link {
    color: white;
    font-size: 1.5rem;
    transition: transform 0.3s ease;
}

.social-link:hover {
    transform: scale(1.2);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .app-header {
        padding-top: 100px;
    }
    
    .app-title {
        font-size: 2.5rem;
    }
    
    .app-description {
        font-size: 1.2rem;
        padding: 0 20px;
    }
    
    .feature-container {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .description-item {
        width: 100%;
    }
}

@media (max-width: 480px) {
    section {
        padding: 40px 0;
    }
    
    .app-header {
        padding-top: 80px;
    }
    
    .app-title {
        font-size: 2rem;
    }
    
    .feature-item, .testimonial-item {
        padding: 20px;
    }
    
    .download-section {
        padding: 40px 20px;
    }
    
    .download-btn {
        padding: 15px 25px;
    }
    
    .mockup-image {
        max-height: 300px;
    }
    
    .app-description-section h2 {
        font-size: 1.8rem;
    }
    
    .description-item {
        padding: 20px;
    }
}

.download-help {
    margin-top: 15px;
    font-size: 0.9rem;
    color: var(--light-text);
}

.direct-link {
    color: var(--primary-color);
    text-decoration: underline;
    font-weight: 500;
}

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