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

:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --text-dark: #333333;
    --text-light: #666666;
    --bg-light: #f5f7fa;
    --white: #ffffff;
}

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: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: bold;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo img {
    width: 40px;
    height: 40px;
    border-radius: 8px;
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.3s;
}

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

/* 首页横幅 */
.hero {
    margin-top: 70px;
    min-height: calc(100vh - 70px);
    display: flex;
    align-items: center;
    background: #0a0e27;
    color: var(--white);
    padding: 60px 20px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(0, 150, 255, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(138, 43, 226, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(0, 255, 255, 0.1) 0%, transparent 40%);
    animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(90deg, rgba(0, 150, 255, 0.03) 1px, transparent 1px),
        linear-gradient(rgba(0, 150, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: grid-move 20s linear infinite;
}

@keyframes grid-move {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

.hero-content {
    flex: 1;
    max-width: 600px;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 56px;
    font-weight: bold;
    margin-bottom: 20px;
    animation: fadeInUp 0.8s ease-out;
    text-shadow: 0 0 20px rgba(0, 150, 255, 0.5);
}

.hero-subtitle {
    font-size: 28px;
    margin-bottom: 15px;
    opacity: 0.95;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-description {
    font-size: 18px;
    margin-bottom: 40px;
    opacity: 0.9;
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 40px;
    background: linear-gradient(135deg, #0096ff 0%, #00d4ff 100%);
    color: var(--white);
    text-decoration: none;
    border-radius: 50px;
    font-size: 18px;
    font-weight: bold;
    box-shadow: 0 8px 30px rgba(0, 150, 255, 0.4);
    transition: transform 0.3s, box-shadow 0.3s;
    animation: fadeInUp 0.8s ease-out 0.6s both;
    position: relative;
    overflow: hidden;
}

.download-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s;
}

.download-btn:hover::before {
    left: 100%;
}

.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(0, 150, 255, 0.6);
}

.btn-icon {
    font-size: 24px;
}

.version-info {
    margin-top: 20px;
    font-size: 14px;
    opacity: 0.8;
    animation: fadeInUp 0.8s ease-out 0.8s both;
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeIn 1s ease-out 0.5s both;
    position: relative;
    z-index: 1;
}

.phone-mockup {
    width: 300px;
    height: 600px;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    border-radius: 40px;
    padding: 15px;
    box-shadow: 0 20px 60px rgba(0, 150, 255, 0.3);
    position: relative;
}

.phone-mockup::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(135deg, #0096ff, #00d4ff, #8a2be2);
    border-radius: 42px;
    z-index: -1;
    opacity: 0.5;
    animation: rotate-border 3s linear infinite;
}

@keyframes rotate-border {
    0% { filter: hue-rotate(0deg); }
    100% { filter: hue-rotate(360deg); }
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #0a0e27 0%, #1a1a2e 100%);
    border-radius: 30px;
    overflow: hidden;
    box-shadow: inset 0 0 30px rgba(0, 150, 255, 0.2);
}

.app-preview {
    padding: 20px;
    color: var(--white);
}

.preview-header {
    font-size: 24px;
    font-weight: bold;
    text-align: center;
    margin-bottom: 40px;
    padding: 20px 0;
}

.preview-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.preview-card {
    background: linear-gradient(135deg, rgba(0, 150, 255, 0.2), rgba(0, 212, 255, 0.2));
    backdrop-filter: blur(10px);
    padding: 30px 15px;
    border-radius: 15px;
    text-align: center;
    font-size: 14px;
    border: 1px solid rgba(0, 150, 255, 0.3);
    box-shadow: 0 4px 15px rgba(0, 150, 255, 0.2);
}

/* 功能特色 */
.features {
    padding: 100px 20px;
    background: var(--white);
}

.section-title {
    font-size: 42px;
    text-align: center;
    margin-bottom: 15px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    text-align: center;
    font-size: 18px;
    color: var(--text-light);
    margin-bottom: 60px;
}

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

.feature-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s, box-shadow 0.3s;
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.2);
}

.feature-icon {
    font-size: 60px;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: var(--text-dark);
}

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

/* 关于我们 */
.about {
    padding: 100px 20px;
    background: var(--bg-light);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    margin-top: 60px;
}

.about-text h3 {
    font-size: 28px;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.about-text p {
    color: var(--text-light);
    margin-bottom: 30px;
    line-height: 1.8;
}

.about-text ul {
    list-style: none;
    margin-bottom: 30px;
}

.about-text ul li {
    padding: 10px 0;
    color: var(--text-light);
    font-size: 16px;
}

.about-stats {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.stat-card {
    background: var(--white);
    padding: 40px;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.stat-number {
    font-size: 48px;
    font-weight: bold;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
}

.stat-label {
    font-size: 18px;
    color: var(--text-light);
}

/* 下载区域 */
.download {
    padding: 100px 20px;
    background: var(--white);
}

.download-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    margin-top: 60px;
    align-items: center;
}

.download-info h3 {
    font-size: 32px;
    margin-bottom: 20px;
    color: var(--text-dark);
}

.download-info p {
    color: var(--text-light);
    margin-bottom: 15px;
    font-size: 16px;
}

.version {
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 30px !important;
}

.download-btn-large {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 20px 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    text-decoration: none;
    border-radius: 50px;
    font-size: 20px;
    font-weight: bold;
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.3);
    transition: transform 0.3s, box-shadow 0.3s;
}

.download-btn-large:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 30px rgba(102, 126, 234, 0.4);
}

.download-qr {
    display: flex;
    justify-content: center;
}

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

.qr-placeholder > p:first-child {
    font-size: 20px;
    font-weight: bold;
    margin-bottom: 20px;
    color: var(--text-dark);
}

.qr-code {
    width: 200px;
    height: 200px;
    background: var(--white);
    border: 2px solid #e0e0e0;
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 15px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.qr-inner {
    font-size: 16px;
    color: var(--text-light);
}

.qr-tip {
    font-size: 14px;
    color: var(--text-light);
}

/* 页脚 */
.footer {
    background: #1a1a1a;
    color: rgba(255, 255, 255, 0.8);
    padding: 60px 20px 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    color: var(--white);
    font-size: 20px;
    margin-bottom: 20px;
}

.footer-section p {
    margin-bottom: 10px;
    font-size: 14px;
}

.footer-section a {
    display: block;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    margin-bottom: 10px;
    transition: color 0.3s;
}

.footer-section a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 14px;
}

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

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hero {
        flex-direction: column;
        text-align: center;
        padding: 40px 20px;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-subtitle {
        font-size: 20px;
    }
    
    .hero-image {
        margin-top: 40px;
    }
    
    .phone-mockup {
        width: 250px;
        height: 500px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .download-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}