:root {
    /* 科技感配色方案 - 视频编辑工具风格 */
    --primary: #0066ff;
    --primary-light: #4d94ff;
    --primary-dark: #0052cc;
    --secondary: #00d4ff;
    --accent: #ff6b6b;
    --accent-secondary: #ffd93d;
    --dark: #0a0f2b;
    --dark-light: #1a1f3b;
    --light: #f8faff;
    --text: #2d3748;
    --text-light: #718096;
    --border: #e2e8f0;
    --card-bg: #ffffff;
    --card-bg-dark: #1a1f3b;
    
    /* 渐变效果 */
    --gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    --gradient-dark: linear-gradient(135deg, var(--dark) 0%, var(--dark-light) 100%);
    --gradient-accent: linear-gradient(135deg, var(--accent) 0%, var(--accent-secondary) 100%);
    --gradient-glass: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);
    
    /* 阴影效果 */
    --shadow: 0 4px 20px rgba(0, 102, 255, 0.08);
    --shadow-lg: 0 10px 40px rgba(0, 102, 255, 0.12);
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.08);
    --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.3);
    
    /* 边框效果 */
    --border-glow: 1px solid rgba(0, 212, 255, 0.3);
    --border-primary: 1px solid rgba(0, 102, 255, 0.2);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background: var(--light);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* Header Styles - 科技感优化增强版 */
header {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(30px);
    box-shadow: 0 4px 30px rgba(0, 102, 255, 0.15);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    padding: 0.8rem 0;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border-bottom: 1px solid rgba(0, 102, 255, 0.08);
}

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

.logo {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    position: relative;
    padding: 0.5rem 0;

}

.logo::before {
    content: '';
    position: absolute;
    top: 0;
    left: -10px;
    right: -10px;
    bottom: 0;
    background: var(--gradient-primary);
    border-radius: 12px;
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: -1;
}

.logo:hover::before {
    opacity: 0.1;
}

.logo i {
    font-size: 2rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: all 0.3s ease;
}

.logo:hover i {
    transform: scale(1.1);
}

/* 主导航链接 */
.nav-links {
    display: flex;
    gap: 1.5rem;
    align-items: left;
    position: relative;
}

.nav-item {
    position: relative;
}

.nav-link {
    color: var(--text);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    padding: 0.8rem 1.2rem;
    border-radius: 10px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    position: relative;
    overflow: hidden;
}

.nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    opacity: 0.1;
    transition: left 0.4s ease;
}

.nav-link:hover::before {
    left: 0;
}

.nav-link:hover {
    color: var(--primary);
    transform: translateY(-2px);
}

.nav-link.active {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 15px rgba(0, 102, 255, 0.3);
}

.nav-link i {
    font-size: 1.1rem;
    transition: all 0.3s ease;
}

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

/* 功能下拉菜单 */
.nav-dropdown {
    position: relative;
}

.dropdown-toggle {
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.dropdown-toggle::after {
    content: '▼';
    font-size: 0.7rem;
    transition: transform 0.3s ease;
}

.nav-dropdown:hover .dropdown-toggle::after {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    padding: 0.8rem 0;
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(0, 102, 255, 0.1);
    z-index: 1000;
}

.nav-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 0.8rem 1.2rem;
    color: var(--text);
    text-decoration: none;
    transition: all 0.2s ease;
    border-left: 3px solid transparent;
}

.dropdown-item:hover {
    background: rgba(0, 102, 255, 0.05);
    color: var(--primary);
    border-left-color: var(--primary);
    padding-left: 1.5rem;
}

.dropdown-item i {
    font-size: 1rem;
    width: 20px;
    text-align: center;
    color: var(--primary);
}

/* 用户操作区域 */
.user-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* 用户信息区域 - 登录状态 */
.user-info {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    position: relative;
    cursor: pointer;
    padding: 0.5rem 1rem;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.user-info:hover {
    background: rgba(0, 102, 255, 0.05);
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
    transition: all 0.3s ease;
}

.user-info:hover .user-avatar {
    transform: scale(1.1);
}

.user-details {
    display: flex;
    flex-direction: column;
    position: relative;
}

.user-name {
    font-weight: 600;
    color: var(--dark);
    font-size: 0.95rem;
    white-space: nowrap;
}

.user-menu {
    position: absolute;
    top: 100%;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    padding: 0.8rem 0;
    min-width: 180px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(0, 102, 255, 0.1);
    z-index: 1000;
}

.user-info:hover .user-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(5px);
}

.user-menu-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 0.8rem 1.2rem;
    color: var(--text);
    text-decoration: none;
    transition: all 0.2s ease;
    border-left: 3px solid transparent;
    font-size: 0.9rem;
}

.user-menu-item:hover {
    background: rgba(0, 102, 255, 0.05);
    color: var(--primary);
    border-left-color: var(--primary);
    padding-left: 1.5rem;
}

.user-menu-item i {
    font-size: 0.9rem;
    width: 18px;
    text-align: center;
    color: var(--primary);
}

.user-menu-item.logout {
    color: #ff6b6b;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
    margin-top: 0.5rem;
    padding-top: 1rem;
}

.user-menu-item.logout:hover {
    background: rgba(255, 107, 107, 0.05);
    color: #ff6b6b;
    border-left-color: #ff6b6b;
}

.user-menu-item.logout i {
    color: #ff6b6b;
}

/* 移动端用户信息适配 */
@media (max-width: 968px) {
    .user-info {
        flex-direction: column;
        text-align: center;
        padding: 1rem;
    }
    
    .user-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background: transparent;
        backdrop-filter: none;
        border: none;
        padding: 0.5rem 0;
    }
    
    .user-menu-item {
        justify-content: center;
        border-left: none;
        border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    }
    
    .user-menu-item:hover {
        border-left: none;
        border-bottom-color: var(--primary);
    }
    
    .user-info:hover .user-menu {
        transform: none;
    }
}

.user-action-btn {
    padding: 0.7rem 1.2rem;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    position: relative;
    overflow: hidden;
}

.user-action-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.6s ease;
}

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

.btn-login {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 15px rgba(0, 102, 255, 0.3);
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 102, 255, 0.4);
}

.btn-register {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-register:hover {
    background: var(--gradient-primary);
    color: white;
    transform: translateY(-2px);
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.mobile-menu-btn:hover {
    background: rgba(0, 102, 255, 0.1);
    color: var(--primary);
}

/* 按钮样式 - 科技感优化 */
.btn {
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-block;
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    font-size: 0.95rem;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.6s ease;
}

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

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 15px rgba(0, 102, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 8px 25px rgba(0, 102, 255, 0.4), var(--shadow-glow);
}

.btn-outline {
    border: 2px solid var(--primary);
    color: var(--primary);
    background: transparent;
    backdrop-filter: blur(10px);
}

.btn-outline:hover {
    background: var(--gradient-primary);
    color: white;
    border-color: transparent;
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 102, 255, 0.3);
}

.btn-light {
    background: var(--primary-light);
    color: white;
    font-size: 0.9rem;
    padding: 0.5rem 1rem;
    box-shadow: 0 2px 10px rgba(0, 102, 255, 0.2);
}

.btn-light:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 102, 255, 0.3);
}

/* Hero Section */
.hero {
    padding: 8rem 0 4rem;
    background: var(--gradient);
    color: white;
    text-align: center;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

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

/* 轮播图样式优化 - 科技感增强 */
.video-translation-section {
    padding: 6rem 0;
    background: linear-gradient(135deg, #f8faff 0%, #f0f4ff 50%, #e8f0ff 100%);
    position: relative;
    overflow: hidden;
    
}

.video-translation-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 20% 80%, rgba(0, 212, 255, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(0, 102, 255, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
}

.section-header h2 {
    font-size: 3rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 1rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    display: inline-block;
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 25%;
    width: 50%;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

.section-header p {
    color: var(--text-light);
    font-size: 1.25rem;
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.8;
}

.translation-content {
    display: flex;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    border-radius: 24px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    margin-bottom: 2rem;
    border: var(--border-primary);
    position: relative;
    transition: all 0.3s ease;
}

.translation-content:hover {
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    transform: translateY(-5px);
}

.carousel-container {
    width: 25%;
    position: relative;
    background: linear-gradient(135deg, #f8faff 0%, #e8f0ff 100%);
    padding: 20px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    border-right: var(--border-primary);
}

.carousel {
    position: relative;
    height: 580px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    justify-content: center;
}

.carousel-slide {
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 15px;
    box-shadow: var(--shadow);
    border: var(--border-primary);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    height: calc(33.333% - 1rem);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.carousel-slide::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.1), transparent);
    transition: left 0.6s ease;
}

.carousel-slide:hover::before {
    left: 100%;
}

.carousel-slide:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: var(--shadow-lg), 0 0 30px rgba(0, 102, 255, 0.2);
    border-color: var(--primary);
}

.carousel-slide.active {
    border-color: var(--primary);
    box-shadow: var(--shadow-lg), 0 0 20px rgba(0, 102, 255, 0.3);
    transform: translateY(-2px);
}

.carousel-slide img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: 12px;
    transition: all 0.4s ease;
    filter: brightness(0.95);
}

.carousel-slide:hover img {
    transform: scale(1.05);
    filter: brightness(1);
}

.carousel-nav {
    position: absolute;
    bottom: 20px;
    left: 0;
    width: 100%;
    display: flex;
    justify-content: center;
    gap: 10px;
    z-index: 10;
}

.carousel-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.2);
    cursor: pointer;
    transition: all 0.3s ease;
}

.carousel-dot.active {
    background: var(--primary);
    transform: scale(1.2);
}

.carousel-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.8);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 10;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    color: var(--dark);
}

.carousel-arrow:hover {
    background: white;
    transform: translateY(-50%) scale(1.1);
}

.carousel-arrow.prev {
    left: 15px;
}

.carousel-arrow.next {
    right: 15px;
}

.video-container {
    width: 75%;
    padding: 2px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.video-wrapper {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.video-wrapper iframe {
    width: 100%;
    display: block;
    border: none;
}

.video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
    padding: 2px;
    color: white;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.video-wrapper:hover .video-overlay {
    opacity: 1;
}

/* 特性列表样式 - 科技感优化 */
.features-list {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 30px;
    margin-top: 3rem;
}

.feature-item {
    text-align: center;
    flex: 1;
    min-width: 250px;
    padding: 30px 25px;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(15px);
    border-radius: 20px;
    box-shadow: var(--shadow);
    border: var(--border-primary);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.feature-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.05), transparent);
    transition: left 0.6s ease;
}

.feature-item:hover::before {
    left: 100%;
}

.feature-item:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-lg), 0 0 40px rgba(0, 102, 255, 0.15);
    border-color: var(--primary);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
    transition: all 0.3s ease;
}

.feature-item:hover .feature-icon {
    transform: scale(1.1);
}

.feature-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--dark);
    position: relative;
}

.feature-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: 1px;
}

.feature-desc {
    font-size: 15px;
    color: var(--text-light);
    line-height: 1.6;
    margin-top: 15px;
}

/* Apps Grid Section */
.apps-grid {
    padding: 5rem 0;
    background: var(--light);
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 1rem;
}

.section-title p {
    color: var(--text-light);
    font-size: 1.125rem;
    max-width: 600px;
    margin: 0 auto;
}

.apps-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.app-card {
    background: var(--card-bg);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-card);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid var(--border);
}

.app-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.app-image {
    height: 200px;
    background: linear-gradient(45deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 3rem;
}

.app-content {
    padding: 15px;
}

.app-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.app-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 0.5rem;
}

.app-description {
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.app-features {
    margin-bottom: 1.5rem;
}

.app-actions {
    display: flex;
    gap: 1rem;
    justify-content: space-between;
}

.api-badge {
    background: var(--primary-light);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

/* Features Section - 科技感优化 */
.features {
    padding: 6rem 0;
    background: linear-gradient(135deg, #f8faff 0%, #f0f4ff 100%);
    position: relative;
    overflow: hidden;
}

.features::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 10% 20%, rgba(0, 212, 255, 0.08) 0%, transparent 50%),
                radial-gradient(circle at 90% 80%, rgba(0, 102, 255, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
    margin-top: 3rem;
    position: relative;
    z-index: 2;
}

.feature-card {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(15px);
    padding: 2.5rem 2rem;
    border-radius: 20px;
    text-align: center;
    box-shadow: var(--shadow);
    border: var(--border-primary);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.1), transparent);
    transition: left 0.6s ease;
}

.feature-card:hover::before {
    left: 100%;
}

.feature-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-lg), 0 0 40px rgba(0, 102, 255, 0.15);
    border-color: var(--primary);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: white;
    font-size: 2rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.feature-icon::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 0.6s ease;
}

.feature-card:hover .feature-icon::before {
    left: 100%;
}

.feature-card:hover .feature-icon {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 8px 25px rgba(0, 102, 255, 0.3);
}

.feature-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--dark);
    position: relative;
}

.feature-card h3::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

.feature-card p {
    color: var(--text-light);
    line-height: 1.7;
    font-size: 1rem;
}

/* CTA Section */
.cta {
    padding: 5rem 0;
    background: var(--gradient);
    color: white;
    text-align: center;
}

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

.cta p {
    font-size: 1.125rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Footer */
footer {
    background: var(--dark);
    color: white;
    padding: 3rem 0;
}

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

.footer-section h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--accent);
}

.footer-section p {
    opacity: 0.8;
    line-height: 1.6;
}

.footer-links {
    list-style: none;
}

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

.footer-links a {
    color: white;
    opacity: 0.8;
    text-decoration: none;
    transition: opacity 0.3s ease;
}

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

/* 分页导航样式 */
.page-navigation {
    position: sticky;
    top: 80px;
    z-index: 100;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
    margin-bottom: 2rem;
}

.page-navigation .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
}

.nav-dots {
    display: flex;
    gap: 1.5rem;
}

.nav-dot {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 8px;
    transition: all 0.3s ease;
    color: var(--text-muted);
}

.nav-dot:hover {
    color: var(--primary);
    background: rgba(37, 99, 235, 0.1);
}

.nav-dot.active {
    color: var(--primary);
    background: rgba(37, 99, 235, 0.1);
}

.nav-dot span {
    font-size: 0.875rem;
    font-weight: 500;
    margin-top: 0.25rem;
}

.nav-dot::before {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: currentColor;
    transition: all 0.3s ease;
}

.nav-dot.active::before {
    width: 12px;
    height: 12px;
}

.nav-arrows {
    display: flex;
    gap: 0.5rem;
}

.nav-arrow {
    width: 40px;
    height: 40px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.nav-arrow:hover {
    border-color: var(--primary);
    color: var(--primary);
}

/* 页面屏幕样式 */
.page-screen {
    display: none;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease;
}

.page-screen.active {
    display: block;
    opacity: 1;
    transform: translateY(0);
}

/* Responsive Design - 科技感优化 */
@media (max-width: 1200px) {
    .container {
        padding: 0 30px;
    }
    
    .section-header h2 {
        font-size: 2.5rem;
    }
    
    .features-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 2rem;
    }
}

@media (max-width: 968px) {
    .translation-content {
        flex-direction: column;
        border-radius: 20px;
    }
    
    .carousel-container, .video-container {
        width: 100%;
    }
    
    .carousel-container {
        border-right: none;
        border-bottom: var(--border-primary);
        padding: 15px;
    }
    
    .carousel {
        height: auto;
        flex-direction: row;
        gap: 15px;
        overflow-x: auto;
        padding: 10px 0;
    }
    
    .carousel-slide {
        min-width: 200px;
        height: 150px;
        flex-shrink: 0;
    }
    
    .video-wrapper iframe {
        height: 300px;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero p {
        font-size: 1.125rem;
    }
    
    .nav-links {
        display: none;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }
    
    .apps-container {
        grid-template-columns: 1fr;
    }
    
    .app-actions {
        flex-direction: column;
        gap: 1rem;
    }

    .features-list {
        flex-direction: column;
        gap: 20px;
    }
    
    .feature-item {
        min-width: 100%;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .feature-card {
        padding: 2rem 1.5rem;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .section-header p {
        font-size: 1.125rem;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }
    
    .video-translation-section {
        padding: 4rem 0;
    }
    
    .features {
        padding: 4rem 0;
    }
    
    .apps-grid {
        padding: 4rem 0;
    }
    
    .section-header h2 {
        font-size: 1.8rem;
    }
    
    .section-header p {
        font-size: 1rem;
    }
    
    .feature-card {
        padding: 1.5rem 1rem;
    }
    
    .feature-icon {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }
    
    .btn {
        padding: 0.75rem 1.25rem;
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .section-header h2 {
        font-size: 1.5rem;
    }
    
    .feature-card h3 {
        font-size: 1.25rem;
    }
    
    .feature-card p {
        font-size: 0.9rem;
    }
    
    .carousel-slide {
        min-width: 150px;
        height: 120px;
    }
    
    .video-wrapper iframe {
        height: 250px;
    }
}

.demo-translation-container {
    width: 100%;
    margin: 20px 0;
  }
  
  .demo-layout {
    display: flex;
    min-height: 500px;
    gap: 20px;
  }
  
  /* 左侧：示例场景和参数设置 */
  .demo-scenario-section {
    width: 35%;
    display: flex;
    flex-direction: column;
  }
  
  .demo-scenario-thumbnails {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 20px;
  }
  
  .demo-scenario-item {
    display: flex;
    align-items: center;
    padding: 10px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
  }
  
  .demo-scenario-item.active {
    border-color: #6200ee;
    background-color: #f5f0ff;
  }
  
  .demo-scenario-item img {
    width: 160px;
    height: 130px;
    border-radius: 6px;
    object-fit: cover;
    margin-right: 12px;
  }
  
  .demo-scenario-info {
    flex: 1;
  }
  
  .demo-scenario-title {
    font-weight: bold;
    margin-bottom: 4px;
    color: #333;
  }
  
  .demo-video-duration {
    font-size: 12px;
    color: #666;
  }
  
  /* 翻译参数区域 */
  .demo-translation-settings {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
  }
  
  .demo-setting-group {
    margin-bottom: 20px;
  }
  
  .demo-setting-title {
    font-weight: bold;
    margin-bottom: 8px;
    color: #333;
  }
  
  .demo-setting-content {
    color: #666;
    margin-bottom: 8px;
  }
  
  .demo-language-selection {
    display: flex;
    gap: 15px;
    font-size: 14px;
    color: #333;
  }
  
  .demo-subtitle-options {
    display: flex;
    flex-direction: column;
    gap: 8px;
  }
  
  .demo-toggle-switch {
    display: flex;
    align-items: center;
    gap: 8px;
  }
  
  .demo-toggle-label {
    font-size: 14px;
    color: #333;
  }
  
  .demo-create-translation-btn {
    width: 100%;
    padding: 12px;
    background: #6200ee;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    cursor: pointer;
    transition: background 0.3s ease;
  }
  
  .demo-create-translation-btn:hover {
    background: #5000cc;
  }
  
  /* 右侧：视频对比区域 */
  .demo-video-comparison-section {
    width: 65%;
  }
  
  .demo-video-container {
    display: flex;
    gap: 10px;
    height: 96%;
  }
  
  .demo-video-player {
    flex: 1;
    position: relative;
    background: #000;
    border-radius: 8px;
    overflow: hidden;
  }
  
  .demo-video-player video {
    width: 100%;
    height: 100%;
    min-height: 400px;
  }
  
  .demo-video-caption {
    position: absolute;
    top: 10px;
    left: 10px;
    background: rgba(0,0,0,0.7);
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
  }
  
  .demo-refresh-video-btn {
    position: absolute;
    bottom: 10px;
    right: 10px;
    background: rgba(255,255,255,0.9);
    border: none;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 14px;
  }

  .video-cloud-text {
    color: white;
  
}

.video-cloud-title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    line-height: 1.2;
    color: white;

}
.video-cloud-image {
    margin-top: 20px; /* 保持与文本的间距 */
    display: flex;
    justify-content: center;
    align-items: center;
   
}.video-cloud-subtitle {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    line-height: 1.5;
    color: white;

}