/* 重置和基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #f0f9ff;
    overflow-x: hidden;
    background: linear-gradient(135deg, #0a1f1a 0%, #0d2b23 50%, #081612 100%);
    min-height: 100vh;
}

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

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(10, 31, 26, 0.8);
    backdrop-filter: blur(25px);
    z-index: 1000;
    border-bottom: 1px solid rgba(16, 185, 129, 0.1);
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    font-size: 26px;
    font-weight: 800;
    background: linear-gradient(135deg, #10b981, #34d399);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-icon {
    width: 36px;
    height: 36px;
    margin-right: 10px;
    border-radius: 10px;
    object-fit: cover;
}

.nav-menu {
    display: flex;
    gap: 35px;
}

.nav-link {
    text-decoration: none;
    color: #f0f9ff;
    font-weight: 500;
    font-size: 15px;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: #10b981;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(135deg, #10b981, #34d399);
    transition: width 0.3s ease;
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: #f0f9ff;
    margin: 3px 0;
    transition: 0.3s;
}

/* 英雄区域样式 */
.hero {
    padding: 140px 0 100px;
    background: linear-gradient(135deg, #0a1f1a 0%, #0d2b23 50%, #081612 100%);
    color: #f0f9ff;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 30%, rgba(16, 185, 129, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 80% 70%, rgba(52, 211, 153, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    flex-direction: column;
    gap: 0;
    position: relative;
    z-index: 1;
}

.hero-content {
    order: 2;
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
    padding-top: 60px;
}

.hero-image {
    order: 1;
    width: 100%;
    margin-bottom: 40px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    background: rgba(16, 185, 129, 0.15);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: 50px;
    color: #34d399;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 30px;
    backdrop-filter: blur(10px);
}

.hero-badge i {
    font-size: 16px;
}

.hero-title {
    font-size: 4rem;
    font-weight: 900;
    line-height: 1.15;
    margin-bottom: 30px;
    text-align: center;
    color: #f0f9ff;
}

.gradient-text {
    background: linear-gradient(135deg, #10b981, #34d399, #6ee7b7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
    margin-top: 10px;
}

.hero-subtitle {
    font-size: 1.15rem;
    margin-bottom: 25px;
    opacity: 0.9;
    line-height: 1.8;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    color: #d1fae5;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    margin-bottom: 60px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 16px;
}

.btn-primary {
    background: linear-gradient(135deg, #10b981, #34d399);
    color: white;
    box-shadow: 0 10px 30px rgba(16, 185, 129, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(16, 185, 129, 0.5);
}

.btn-secondary {
    background: rgba(16, 185, 129, 0.15);
    color: #34d399;
    border: 2px solid rgba(16, 185, 129, 0.3);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(16, 185, 129, 0.25);
    border-color: rgba(16, 185, 129, 0.5);
    transform: translateY(-3px);
}

.btn i {
    font-size: 18px;
}

.hero-stats {
    display: flex;
    gap: 60px;
    justify-content: center;
    flex-wrap: wrap;
    padding-top: 40px;
    border-top: 1px solid rgba(16, 185, 129, 0.2);
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    background: linear-gradient(135deg, #10b981, #34d399);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.8;
    color: #d1fae5;
}

/* 应用截图展示样式 */
.app-screenshots {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    overflow: hidden;
}

.screenshot-gallery {
    display: flex;
    gap: 20px;
    justify-content: center;
    align-items: center;
    width: 100%;
    max-width: 1200px;
    padding: 0 20px;
}

.screenshot-item {
    flex: 1;
    max-width: 280px;
    height: 520px;
    object-fit: cover;
    border-radius: 30px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    border: 2px solid rgba(16, 185, 129, 0.2);
}

.screenshot-item:nth-child(1) {
    transform: rotate(-4deg) translateY(20px);
}

.screenshot-item:nth-child(2) {
    transform: rotate(2deg) translateY(-10px);
    z-index: 2;
}

.screenshot-item:nth-child(3) {
    transform: rotate(-2deg) translateY(15px);
    z-index: 1;
}

.screenshot-item:nth-child(4) {
    transform: rotate(4deg) translateY(-15px);
}

.screenshot-item:hover {
    transform: rotate(0deg) translateY(-30px) scale(1.08);
    z-index: 10;
    box-shadow: 0 30px 70px rgba(16, 185, 129, 0.4);
    border-color: rgba(16, 185, 129, 0.6);
}

/* 功能特色区域 */
.features {
    padding: 120px 0;
    background: linear-gradient(135deg, #081612 0%, #0d2b23 50%, #0a1f1a 100%);
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-title {
    font-size: 3.5rem;
    font-weight: 900;
    background: linear-gradient(135deg, #f0f9ff, #d1fae5);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 20px;
}

.section-subtitle {
    font-size: 1.2rem;
    color: #a7f3d0;
    max-width: 600px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    max-width: 1400px;
    margin: 0 auto;
}

.feature-card.featured {
    grid-column: 1 / -1;
}

.feature-card {
    background: rgba(10, 31, 26, 0.6);
    padding: 35px;
    border-radius: 30px;
    text-align: left;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(16, 185, 129, 0.15);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
    display: flex;
    flex-direction: column;
}

.feature-card.featured {
    padding: 50px;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 25px 60px rgba(16, 185, 129, 0.3);
    border-color: rgba(16, 185, 129, 0.4);
}

.feature-image {
    width: 100%;
    height: 280px;
    overflow: hidden;
    border-radius: 20px;
    margin-bottom: 25px;
    position: relative;
}

.feature-card.featured .feature-image {
    height: 450px;
}

.feature-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.feature-card:hover .feature-img {
    transform: scale(1.1);
}

.feature-icon {
    width: 75px;
    height: 75px;
    background: linear-gradient(135deg, #10b981, #34d399);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 25px;
    position: relative;
    z-index: 2;
    flex-shrink: 0;
}

.feature-card.featured .feature-icon {
    width: 95px;
    height: 95px;
    border-radius: 24px;
}

.feature-icon i {
    font-size: 2.2rem;
    color: white;
}

.feature-card.featured .feature-icon i {
    font-size: 2.8rem;
}

.feature-title {
    font-size: 1.6rem;
    font-weight: 700;
    color: #f0f9ff;
    margin-bottom: 15px;
}

.feature-card.featured .feature-title {
    font-size: 2.2rem;
    margin-bottom: 20px;
}

.feature-description {
    color: #a7f3d0;
    line-height: 1.8;
    font-size: 1rem;
    flex-grow: 1;
}

.feature-card.featured .feature-description {
    font-size: 1.15rem;
    line-height: 1.9;
}

/* 为什么选择Vireel */
.why-vireel {
    padding: 120px 0;
    background: linear-gradient(135deg, #0a1f1a 0%, #0d2b23 50%, #081612 100%);
}

.why-content {
    max-width: 1200px;
    margin: 0 auto;
}

.why-header {
    text-align: center;
    margin-bottom: 70px;
}

.why-title {
    font-size: 3.5rem;
    font-weight: 900;
    background: linear-gradient(135deg, #f0f9ff, #d1fae5);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 20px;
}

.why-subtitle {
    font-size: 1.2rem;
    color: #a7f3d0;
}

.why-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.why-feature {
    display: flex;
    gap: 25px;
    padding: 40px;
    background: rgba(10, 31, 26, 0.6);
    border-radius: 25px;
    border: 1px solid rgba(16, 185, 129, 0.15);
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.why-feature:hover {
    transform: translateY(-8px);
    border-color: rgba(16, 185, 129, 0.4);
    box-shadow: 0 20px 50px rgba(16, 185, 129, 0.2);
}

.why-icon {
    width: 65px;
    height: 65px;
    min-width: 65px;
    background: linear-gradient(135deg, #10b981, #34d399);
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.why-icon i {
    font-size: 1.8rem;
    color: white;
}

.why-text-content h3 {
    font-size: 1.4rem;
    font-weight: 700;
    color: #f0f9ff;
    margin-bottom: 12px;
}

.why-text-content p {
    color: #a7f3d0;
    line-height: 1.7;
    font-size: 1rem;
}

/* 应用场景与行业 */
.use-cases {
    padding: 120px 0;
    background: linear-gradient(135deg, #081612 0%, #0d2b23 50%, #0a1f1a 100%);
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    max-width: 1400px;
    margin: 0 auto;
}

.use-case-card {
    background: rgba(10, 31, 26, 0.6);
    padding: 40px;
    border-radius: 25px;
    text-align: center;
    border: 1px solid rgba(16, 185, 129, 0.15);
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.use-case-card:hover {
    transform: translateY(-10px);
    border-color: rgba(16, 185, 129, 0.4);
    box-shadow: 0 20px 50px rgba(16, 185, 129, 0.2);
}

.use-case-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #10b981, #34d399);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
}

.use-case-icon i {
    font-size: 2.2rem;
    color: white;
}

.use-case-card h3 {
    font-size: 1.4rem;
    font-weight: 700;
    color: #f0f9ff;
    margin-bottom: 15px;
}

.use-case-card p {
    color: #a7f3d0;
    line-height: 1.7;
    font-size: 0.95rem;
}

/* 应用截图画廊 */
.app-gallery {
    padding: 120px 0;
    background: linear-gradient(135deg, #0a1f1a 0%, #0d2b23 50%, #081612 100%);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    max-width: 1400px;
    margin: 0 auto;
}

.gallery-item {
    position: relative;
    border-radius: 25px;
    overflow: hidden;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    background: rgba(10, 31, 26, 0.6);
    aspect-ratio: 9 / 16;
    border: 2px solid rgba(16, 185, 129, 0.2);
}

.gallery-item:hover {
    transform: translateY(-15px);
    box-shadow: 0 30px 70px rgba(16, 185, 129, 0.4);
    border-color: rgba(16, 185, 129, 0.5);
    z-index: 10;
}

.gallery-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.gallery-item:hover .gallery-img {
    transform: scale(1.1);
}

.gallery-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.9));
    color: white;
    padding: 30px;
    transform: translateY(100%);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.gallery-item:hover .gallery-overlay {
    transform: translateY(0);
}

.gallery-overlay h4 {
    margin: 0 0 8px 0;
    font-size: 1.4rem;
    font-weight: 700;
    color: #34d399;
}

.gallery-overlay p {
    margin: 0;
    font-size: 0.95rem;
    opacity: 0.9;
    color: #d1fae5;
}

/* 下载区域 */
.download {
    padding: 120px 0;
    background: linear-gradient(135deg, #081612 0%, #0d2b23 50%, #0a1f1a 100%);
    text-align: center;
}

.download-content {
    max-width: 800px;
    margin: 0 auto;
}

.download-header {
    margin-bottom: 50px;
}

.download-title {
    font-size: 3.2rem;
    font-weight: 900;
    background: linear-gradient(135deg, #f0f9ff, #d1fae5);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 20px;
    line-height: 1.2;
}

.download-subtitle {
    font-size: 1.3rem;
    color: #a7f3d0;
}

.download-buttons {
    display: flex;
    justify-content: center;
    margin-bottom: 50px;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 25px 40px;
    background: linear-gradient(135deg, #10b981, #34d399);
    border-radius: 20px;
    text-decoration: none;
    color: white;
    transition: all 0.3s ease;
    box-shadow: 0 15px 40px rgba(16, 185, 129, 0.3);
}

.download-btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 50px rgba(16, 185, 129, 0.5);
}

.download-btn i {
    font-size: 3rem;
}

.btn-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
}

.btn-label {
    font-size: 1.2rem;
    font-weight: 700;
}

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

.download-features {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 40px;
}

.download-feature {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    color: #d1fae5;
    font-size: 1.05rem;
}

.download-feature i {
    color: #34d399;
    font-size: 1.3rem;
}

.download-cta {
    margin-bottom: 40px;
}

.download-cta p {
    color: #a7f3d0;
    font-size: 1.1rem;
    line-height: 1.7;
}

.legal-links {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
}

.legal-links a {
    color: #34d399;
    text-decoration: none;
    transition: color 0.3s ease;
    font-weight: 500;
}

.legal-links a:hover {
    color: #10b981;
    text-decoration: underline;
}

.legal-links span {
    color: #a7f3d0;
}

/* 联系我们 */
.contact {
    padding: 100px 0;
    background: linear-gradient(135deg, #0a1f1a 0%, #0d2b23 50%, #081612 100%);
    text-align: center;
}

.contact-title {
    font-size: 3rem;
    font-weight: 900;
    background: linear-gradient(135deg, #f0f9ff, #d1fae5);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 20px;
}

.contact-subtitle {
    font-size: 1.2rem;
    color: #a7f3d0;
    margin-bottom: 50px;
}

.contact-info {
    display: flex;
    justify-content: center;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 25px 40px;
    background: rgba(10, 31, 26, 0.6);
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(16, 185, 129, 0.2);
    backdrop-filter: blur(10px);
}

.contact-item i {
    font-size: 1.8rem;
    color: #34d399;
}

.contact-item a {
    font-size: 1.15rem;
    color: #f0f9ff;
    text-decoration: none;
    transition: color 0.3s ease;
}

.contact-item a:hover {
    color: #34d399;
}

/* 页脚 */
.footer {
    padding: 70px 0;
    background: linear-gradient(135deg, #081612 0%, #0a1f1a 50%, #081612 100%);
    color: #f0f9ff;
    text-align: center;
    border-top: 1px solid rgba(16, 185, 129, 0.1);
}

.footer-content {
    max-width: 700px;
    margin: 0 auto;
}

.footer-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 800;
    background: linear-gradient(135deg, #10b981, #34d399);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 20px;
}

.footer-icon {
    width: 36px;
    height: 36px;
    margin-right: 10px;
    border-radius: 10px;
    object-fit: cover;
}

.footer-text {
    font-size: 1.1rem;
    margin-bottom: 30px;
    color: #a7f3d0;
}

.footer-links {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
    margin-bottom: 25px;
}

.footer-links a {
    color: #d1fae5;
    text-decoration: none;
    transition: color 0.3s ease;
    font-weight: 500;
}

.footer-links a:hover {
    color: #34d399;
}

.footer-links .separator {
    color: #a7f3d0;
}

.footer-copyright {
    font-size: 0.95rem;
    color: #a7f3d0;
    opacity: 0.8;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .use-cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2.5rem;
    }
    
    .why-title {
        font-size: 2.5rem;
    }
    
    .download-title {
        font-size: 2.2rem;
    }
    
    .screenshot-gallery {
        flex-wrap: wrap;
        gap: 15px;
    }
    
    .screenshot-item {
        flex: 1 1 calc(50% - 10px);
        max-width: 100%;
        height: 400px;
        transform: rotate(0deg) !important;
    }
    
    .why-features {
        grid-template-columns: 1fr;
    }
    
    .use-cases-grid {
        grid-template-columns: 1fr;
    }
    
    .gallery-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-stats {
        gap: 30px;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 10px;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 120px 0 80px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .features,
    .why-vireel,
    .use-cases,
    .app-gallery,
    .download {
        padding: 80px 0;
    }
    
    .feature-card,
    .feature-card.featured {
        padding: 25px;
    }
    
    .why-feature {
        flex-direction: column;
        text-align: center;
        padding: 30px;
    }
    
    .screenshot-item {
        height: 350px;
    }
}

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

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

.hero-content {
    animation: fadeInUp 1s ease-out;
}

.feature-card {
    animation: fadeInUp 0.6s ease-out;
}

.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; }

/* 滚动行为 */
html {
    scroll-behavior: smooth;
}

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: #0a1f1a;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #10b981, #34d399);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #059669, #10b981);
}