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

:root {
    --primary-color: #3b82f6;
    --secondary-color: #06b6d4;
    --accent-color: #0ea5e9;
    --dark-bg: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --gradient: linear-gradient(135deg, #3b82f6 0%, #06b6d4 100%);
    --shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Microsoft YaHei', sans-serif;
    background: var(--dark-bg);
    color: var(--text-primary);
    line-height: 1.6;
    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(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    padding: 1rem 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

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

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

.logo-image {
    height: 60px;
    width: auto;
    object-fit: contain;
}

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

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

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

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

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 3px;
    transition: 0.3s;
}

/* 英雄区域 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 100px 0 50px;
    background: radial-gradient(circle at top right, rgba(59, 130, 246, 0.1), transparent 50%),
                radial-gradient(circle at bottom left, rgba(6, 182, 212, 0.1), transparent 50%);
}

.hero .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    text-align: center;
    gap: 4rem;
}

.hero-content {
    animation: fadeIn 1s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 1;
    max-width: 600px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1rem;
}

.gradient-text {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
    justify-content: center;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.3s, box-shadow 0.3s;
}

.btn-icon {
    width: 24px;
    height: 24px;
    object-fit: contain;
}

.btn-primary {
    background: var(--gradient);
    color: white;
    box-shadow: 0 10px 30px rgba(59, 130, 246, 0.3);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(59, 130, 246, 0.4);
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

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

.stat-item h3 {
    font-size: 2rem;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.stat-item p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.hero-image {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    animation: fadeIn 1s ease;
    flex-shrink: 0;
}

.phone-mockup {
    width: 280px;
    height: 560px;
    background: linear-gradient(145deg, #1e293b, #0f172a);
    border-radius: 40px;
    padding: 15px;
    box-shadow: var(--shadow), 
                0 0 60px rgba(59, 130, 246, 0.2);
    position: relative;
    overflow: hidden;
}

.phone-mockup::before {
    content: '';
    position: absolute;
    top: 15px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 6px;
    background: #334155;
    border-radius: 10px;
    z-index: 10;
}

.preview-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 30px;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: #000;
    border-radius: 30px;
    overflow: hidden;
}

.live-demo {
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, #3b82f6, #06b6d4, #0ea5e9);
    position: relative;
}

.live-header {
    display: flex;
    justify-content: space-between;
    padding: 1rem;
    background: linear-gradient(180deg, rgba(0,0,0,0.5), transparent);
}

.live-badge {
    background: rgba(239, 68, 68, 0.9);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.live-badge i {
    animation: pulse 2s infinite;
}

.live-viewers {
    background: rgba(0, 0, 0, 0.5);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.75rem;
}

.live-content {
    position: relative;
    height: calc(100% - 80px);
}

.gradient-bg {
    position: absolute;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, 
        rgba(59, 130, 246, 0.3),
        rgba(6, 182, 212, 0.3),
        rgba(14, 165, 233, 0.3));
    animation: gradientShift 5s ease infinite;
}

.live-footer {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 1rem;
    background: linear-gradient(0deg, rgba(0,0,0,0.7), transparent);
}

.host-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.avatar {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #3b82f6, #06b6d4);
    border-radius: 50%;
    border: 2px solid white;
}

/* 功能特色 */
.features {
    padding: 100px 0;
    background: linear-gradient(180deg, transparent, rgba(59, 130, 246, 0.05), transparent);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 4rem;
    font-size: 1.1rem;
}

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

.feature-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 20px;
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(59, 130, 246, 0.2);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

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

/* 关于我们 */
.about-us {
    padding: 100px 0;
    background: linear-gradient(180deg, transparent, rgba(59, 130, 246, 0.03), transparent);
}

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

.company-info {
    text-align: center;
    margin-bottom: 4rem;
}

.company-name-cn {
    font-size: 2rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.company-name-en {
    font-size: 1.1rem;
    color: var(--text-secondary);
    font-weight: 400;
    margin-bottom: 2rem;
}

.company-desc {
    font-size: 1.1rem;
    line-height: 2;
    color: var(--text-secondary);
}

.product-mission {
    background: var(--card-bg);
    padding: 2.5rem;
    border-radius: 20px;
    margin-bottom: 3rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.product-mission h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.product-mission h3 i {
    color: var(--primary-color);
}

.product-mission p {
    font-size: 1.05rem;
    line-height: 2;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.product-name {
    color: var(--primary-color);
    font-size: 1.15rem;
}

.features-list {
    margin-bottom: 3rem;
}

.features-list h3 {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.features-list h3 i {
    color: #ec4899;
}

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

.feature-item-box {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature-item-box:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(59, 130, 246, 0.2);
}

.feature-item-box i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.feature-item-box h4 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.feature-item-box p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.vision {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(6, 182, 212, 0.1));
    padding: 2.5rem;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.vision p {
    font-size: 1.05rem;
    line-height: 2;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.vision p:last-child {
    margin-bottom: 0;
}

/* 下载区域 */
.download {
    padding: 100px 0;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(6, 182, 212, 0.1));
}

.download-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.download-text {
    width: 100%;
}

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

.download-text p {
    color: var(--text-secondary);
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

.download-buttons {
    display: flex;
    flex-direction: row;
    gap: 3rem;
    margin-bottom: 2rem;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.5rem;
    background: var(--card-bg);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.3s;
    min-width: 250px;
}

.download-btn:hover {
    transform: translateY(-5px) scale(1.02);
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px rgba(59, 130, 246, 0.3);
}

.download-btn i {
    font-size: 2.5rem;
}

.download-icon {
    width: 50px;
    height: 50px;
    object-fit: contain;
}

.download-btn small {
    display: block;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.download-btn strong {
    display: block;
    font-size: 1.2rem;
}

.qr-code {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.qr-placeholder {
    width: 150px;
    height: 150px;
    background: white;
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
}

.qr-placeholder i {
    font-size: 4rem;
    color: var(--dark-bg);
}

.qr-image {
    width: 120px;
    height: 120px;
    border-radius: 10px;
    margin-bottom: 0.5rem;
    display: block;
    background: white;
    padding: 5px;
}

.qr-code p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 0;
}

.floating-phone {
    animation: float 3s ease-in-out infinite;
}

.phone-frame {
    width: 300px;
    height: 400px;
    background: var(--card-bg);
    border-radius: 30px;
    padding: 2rem;
    box-shadow: var(--shadow);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.phone-content {
    text-align: center;
}

.app-icon {
    width: 100px;
    height: 100px;
    background: var(--gradient);
    border-radius: 25px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 10px 30px rgba(59, 130, 246, 0.3);
}

.phone-content h4 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

.rating {
    color: #fbbf24;
    font-size: 1.2rem;
}

.rating span {
    color: var(--text-secondary);
    margin-left: 0.5rem;
}

/* 用户评价 */
.testimonials {
    padding: 100px 0;
}

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

.testimonial-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.stars {
    color: #fbbf24;
    margin-bottom: 1rem;
}

.testimonial-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-avatar {
    width: 50px;
    height: 50px;
    background: var(--gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.user-info h4 {
    margin-bottom: 0.25rem;
}

.user-info span {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* 页脚 */
.footer {
    background: var(--card-bg);
    padding: 4rem 0 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.footer-section h4 {
    margin-bottom: 1rem;
}

.footer-section p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s;
}

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

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
}

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

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

.icp-link {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s;
}

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

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--gradient);
    border: none;
    border-radius: 50%;
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
    box-shadow: 0 5px 20px rgba(59, 130, 246, 0.3);
    z-index: 999;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(59, 130, 246, 0.5);
}

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

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

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

@keyframes gradientShift {
    0%, 100% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
}

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

/* 响应式设计 */
@media (max-width: 968px) {
    .hero .container {
        flex-direction: column;
        gap: 3rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-image {
        flex-wrap: wrap;
    }
    
    .phone-mockup {
        width: 240px;
        height: 480px;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--card-bg);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        padding: 2rem 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hamburger {
        display: flex;
    }
}

@media (max-width: 640px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .hero-stats {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .features-grid,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-image {
        gap: 1rem;
    }
    
    .phone-mockup {
        width: 200px;
        height: 400px;
        padding: 10px;
    }
    
    .download-buttons {
        flex-direction: column;
        gap: 2rem;
    }
    
    .download-btn {
        font-size: 0.9rem;
    }
    
    .download-btn i {
        font-size: 2rem;
    }
    
    .company-name-cn {
        font-size: 1.5rem;
    }
    
    .company-name-en {
        font-size: 0.95rem;
    }
    
    .feature-items {
        grid-template-columns: 1fr;
    }
}