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

:root {
    --primary-color: #4A90E2;
    --secondary-color: #7B68EE;
    --accent-color: #FF6B6B;
    --text-dark: #2C3E50;
    --text-light: #7F8C8D;
    --bg-light: #F8F9FA;
    --bg-white: #FFFFFF;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.15);
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB',
        'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    overflow-x: hidden;
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
    z-index: 1000;
    transition: var(--transition);
}

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

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--text-dark);
}

.logo {
    font-size: 2rem;
}

.brand-name-en {
    color: var(--primary-color);
    font-size: 0.9rem;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

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

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    border-radius: 3px;
    transition: var(--transition);
}

/* 首页横幅 */
.hero {
    margin-top: 56px;
    min-height: calc(100vh - 56px);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    padding: 2.5rem 0;
    position: relative;
    z-index: 2;
}

.hero-text {
    color: white;
    padding-left: 50px;
    padding-right: 20px;
}

.hero-title {
    font-size: 4rem;
    font-weight: bold;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.title-main {
    display: block;
}

.title-sub {
    display: block;
    font-size: 2.5rem;
    opacity: 0.9;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    opacity: 0.95;
}

.hero-description {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

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

.btn {
    padding: 14px 32px;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    display: inline-block;
    cursor: pointer;
    border: 2px solid transparent;
}

.btn-primary {
    background: white;
    color: var(--primary-color);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: transparent;
    color: white;
    border-color: white;
}

.btn-secondary:hover {
    background: white;
    color: var(--primary-color);
}

/* 手机模型 */
.phone-mockup {
    width: 300px;
    height: 600px;
    background: #1a1a1a;
    border-radius: 40px;
    padding: 12px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    margin: 0 auto;
    position: relative;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: #000;
    border-radius: 32px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.screen-content {
    height: 100%;
    display: flex;
    flex-direction: column;
}
/* 截图展示样式 */
.screenshot-img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    display: block;
}

.mock-header {
    padding: 12px 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
}

.mock-time {
    font-size: 14px;
    font-weight: 600;
}

.mock-body {
    flex: 1;
    padding: 16px;
    overflow-y: auto;
    background: #f5f5f5;
}

.mock-card {
    background: white;
    border-radius: 12px;
    padding: 12px;
    margin-bottom: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.mock-card-image {
    width: 100%;
    height: 120px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 8px;
    margin-bottom: 8px;
}

.mock-card-text {
    height: 12px;
    background: #e0e0e0;
    border-radius: 4px;
    margin-bottom: 6px;
}

.mock-card-text.short {
    width: 60%;
}

.mock-footer {
    display: flex;
    justify-content: space-around;
    align-items: center;
    padding: 12px;
    background: white;
    border-top: 1px solid #eee;
}

.mock-tab {
    width: 40px;
    height: 4px;
    background: #ddd;
    border-radius: 2px;
}

.mock-tab.active {
    background: #667eea;
}

.mock-tab.center {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: white;
    margin-top: -25px;
}

/* 雪花动画 */
.snow-animation {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.snowflake {
    position: absolute;
    color: white;
    font-size: 2rem;
    opacity: 0.7;
    animation: fall linear infinite;
}

@keyframes fall {
    0% {
        transform: translateY(-100px) rotate(0deg);
    }
    100% {
        transform: translateY(100vh) rotate(360deg);
    }
}

.snowflake:nth-child(1) { left: 10%; animation-duration: 10s; animation-delay: 0s; }
.snowflake:nth-child(2) { left: 20%; animation-duration: 12s; animation-delay: 1s; }
.snowflake:nth-child(3) { left: 30%; animation-duration: 8s; animation-delay: 2s; }
.snowflake:nth-child(4) { left: 40%; animation-duration: 14s; animation-delay: 0.5s; }
.snowflake:nth-child(5) { left: 50%; animation-duration: 11s; animation-delay: 1.5s; }
.snowflake:nth-child(6) { left: 60%; animation-duration: 9s; animation-delay: 3s; }
.snowflake:nth-child(7) { left: 70%; animation-duration: 13s; animation-delay: 0.8s; }
.snowflake:nth-child(8) { left: 80%; animation-duration: 10s; animation-delay: 2.5s; }

/* 功能展示 */
.features {
    padding: 4rem 0;
    background: var(--bg-light);
}

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

.section-subtitle {
    text-align: center;
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 4rem;
}

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

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
}

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

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.feature-card p {
    color: var(--text-light);
    line-height: 1.8;
}

/* 亮点展示 */
.highlights {
    padding: 4rem 0;
    background: white;
}

.highlight-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    margin-bottom: 6rem;
}

.highlight-item.reverse {
    direction: rtl;
}

.highlight-item.reverse > * {
    direction: ltr;
}

.highlight-content h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.highlight-content p {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.highlight-list {
    list-style: none;
}

.highlight-list li {
    font-size: 1rem;
    color: var(--text-light);
    margin-bottom: 0.8rem;
    padding-left: 1.5rem;
}

.image-placeholder {
    width: 100%;
    height: 400px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
}

.placeholder-icon {
    font-size: 8rem;
    opacity: 0.3;
}

/* 统计数据 */
.stats {
    padding: 4rem 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 3rem;
    text-align: center;
}

.stat-number {
    font-size: 3rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* 下载区域 */
.download {
    padding: 4rem 0;
    background: var(--bg-light);
}

.download-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.download-card {
    background: white;
    padding: 3rem 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

.download-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.download-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.download-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.download-card p {
    color: var(--text-light);
    margin-bottom: 2rem;
}

.btn-download {
    width: 100%;
    padding: 14px 32px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
}

.btn-download:hover {
    background: var(--secondary-color);
    transform: scale(1.05);
}

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

.btn-download.disabled:hover {
    transform: none;
}

/* 联系我们 */
.contact {
    padding: 4rem 0;
    background: white;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-top: 3rem;
}

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

.contact-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.contact-item h4 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.contact-item p {
    color: var(--text-light);
}

/* 页脚 */
.footer {
    background: var(--text-dark);
    color: white;
    padding: 3rem 0 1.5rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: white;
    text-decoration: none;
    opacity: 0.8;
    transition: var(--transition);
}

.footer-links a:hover {
    opacity: 1;
}

.footer-bottom {
    text-align: center;
    opacity: 0.7;
}

.footer-subtitle {
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

/* 二维码弹窗 */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
}

.modal-content {
    background: white;
    margin: 10% auto;
    padding: 3rem;
    border-radius: var(--border-radius);
    max-width: 400px;
    text-align: center;
    position: relative;
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.close {
    position: absolute;
    right: 1.5rem;
    top: 1.5rem;
    font-size: 2rem;
    cursor: pointer;
    color: var(--text-light);
    transition: var(--transition);
}

.close:hover {
    color: var(--text-dark);
}

.qr-placeholder {
    margin-top: 2rem;
    padding: 3rem;
    background: var(--bg-light);
    border-radius: var(--border-radius);
}

.qr-placeholder p {
    font-size: 1.2rem;
    color: var(--text-light);
}

.qr-hint {
    font-size: 0.9rem !important;
    margin-top: 1rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        padding: 2rem 0;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    .hero-text {
        padding-left: 16px;
        padding-right: 16px;
    }
    
    .title-sub {
        font-size: 1.8rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .phone-mockup {
        width: 250px;
        height: 500px;
    }
    
    .hero-image {
        order: -1;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .highlight-item,
    .highlight-item.reverse {
        grid-template-columns: 1fr;
        gap: 2rem;
        direction: ltr;
    }
    
    .image-placeholder {
        height: 250px;
    }
    
    .placeholder-icon {
        font-size: 5rem;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }
    
    .download-options {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 2rem;
    }
    
    .footer-links {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
}

/* 滚动效果 */
html {
    scroll-behavior: smooth;
}

/* 动画延迟 */
.feature-card {
    animation: fadeInUp 0.6s ease forwards;
    opacity: 0;
}

.feature-card:nth-child(1) { animation-delay: 0.1s; }
.feature-card:nth-child(2) { animation-delay: 0.2s; }
.feature-card:nth-child(3) { animation-delay: 0.3s; }
.feature-card:nth-child(4) { animation-delay: 0.4s; }
.feature-card:nth-child(5) { animation-delay: 0.5s; }
.feature-card:nth-child(6) { animation-delay: 0.6s; }

@keyframes fadeInUp {
    from {
        transform: translateY(30px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}