/* 视频播放框架 */
.video-frame {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(5px);
    animation: fadeIn 0.3s ease-out;
}
.video-cover-image {
    width: 100%;
    height: 100%;
    object-fit: contain;  /* 保持图片比例 */
    transition: var(--transition);
    filter: brightness(0.8);
    background: #1a1a1a;  /* 添加深色背景 */
}
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}
.hero-logo {
    width: 150px;        /* 按需要调整宽度 */
    height: auto;       /* 保持比例 */
    display: block;     /* 避免图片底部出现空隙 */
    margin: 0 auto;     /* 水平居中 */
}

.logo-image {
    height: 32px;      /* 根据需要调整高度 */
    width: auto;       /* 自动按比例缩放 */
    margin-right: 8px; /* 图像与文字间距 */
    vertical-align: baseline; /* 让图像和文字垂直对齐 */
}
.video-frame.hidden {
    display: none;
}

.video-frame video {
    border-radius: var(--border-radius);
    box-shadow: 0 0 50px rgba(0, 0, 0, 0.5);
}

.close-video {
    position: absolute;
    top: 2rem;
    right: 2rem;
    background: var(--accent-color);
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    transition: var(--transition);
    z-index: 10000;
}

.close-video:hover {
    background: #c0392b;
    transform: scale(1.1);
    box-shadow: 0 0 20px rgba(231, 76, 60, 0.5);
}

/* Dataset Composition */
.dataset-composition {
    margin: 4rem 0;
}

/* Core Capabilities */
.core-capabilities {
    margin: 4rem 0;
}

.capabilities-tabs {
    margin-top: 2rem;
}

.tab-nav {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 2rem;
    border-bottom: 2px solid #eee;
    overflow-x: auto;
    padding-bottom: 0;
}

.tab-button {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background: transparent;
    border: none;
    color: #666;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    border-radius: var(--border-radius) var(--border-radius) 0 0;
    white-space: nowrap;
    position: relative;
    min-width: 140px;
    justify-content: center;
}

.tab-button:hover {
    color: var(--secondary-color);
    background: rgba(52, 152, 219, 0.05);
}

.tab-button.active {
    color: var(--secondary-color);
    background: var(--card-bg);
    border-bottom: 3px solid var(--secondary-color);
}

.tab-button i {
    font-size: 1.1rem;
    transition: var(--transition);
}

.tab-button.active i {
    transform: scale(1.1);
}

.tab-content {
    background: var(--card-bg);
    border-radius: 0 var(--border-radius) var(--border-radius) var(--border-radius);
    padding: 2rem;
    box-shadow: var(--shadow);
}

.tab-panel {
    display: none;
    animation: fadeInUp 0.5s ease-out;
}

.tab-panel.active {
    display: block;
}

.capability-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.capability-text h3 {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.capability-text p {
    color: #666;
    line-height: 1.7;
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.capability-features {
    list-style: none;
    padding: 0;
}

.capability-features li {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    margin-bottom: 0.8rem;
    padding: 0.5rem 0;
    color: #555;
    transition: var(--transition);
}

.capability-features li:hover {
    color: var(--secondary-color);
    transform: translateX(5px);
}

.capability-features i {
    color: var(--secondary-color);
    font-size: 0.9rem;
    width: 16px;
    flex-shrink: 0;
}

.capability-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

/* 解密演示样式 */
.decrypt-demo {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    padding: 2rem;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: var(--border-radius);
    border: 2px solid rgba(52, 152, 219, 0.1);
    min-width: 280px;
}

.input-cipher, .output-plain {
    padding: 1rem 2rem;
    border-radius: var(--border-radius);
    font-family: 'Courier New', monospace;
    font-size: 1.2rem;
    font-weight: 600;
    text-align: center;
    min-width: 200px;
    transition: var(--transition);
}

.input-cipher {
    background: linear-gradient(45deg, #ff6b6b, #ee5a52);
    color: white;
    box-shadow: 0 4px 15px rgba(255, 107, 107, 0.3);
}

.output-plain {
    background: linear-gradient(45deg, #51cf66, #47b559);
    color: white;
    box-shadow: 0 4px 15px rgba(81, 207, 102, 0.3);
}

.decrypt-arrow {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--secondary-color);
    font-size: 1.5rem;
    animation: bounce 2s ease-in-out infinite;
}

.decrypt-arrow span {
    font-size: 0.9rem;
    font-weight: 500;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* 分析图表样式 */
.analysis-chart {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: var(--border-radius);
    padding: 2rem;
    border: 2px solid rgba(52, 152, 219, 0.1);
    min-width: 280px;
}

.chart-title {
    text-align: center;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.freq-bars {
    display: flex;
    align-items: end;
    justify-content: space-around;
    height: 120px;
    gap: 0.5rem;
}

.freq-bar {
    background: linear-gradient(to top, var(--secondary-color), #74b9ff);
    border-radius: 4px 4px 0 0;
    width: 30px;
    position: relative;
    transition: all 0.3s ease;
    animation: barGrow 1.5s ease-out;
}

.freq-bar:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3);
}

.freq-bar span {
    position: absolute;
    bottom: -25px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary-color);
}

@keyframes barGrow {
    from { height: 0; }
    to { height: 100%; }
}

/* 推理流程样式 */
.reasoning-flow {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 2rem;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: var(--border-radius);
    border: 2px solid rgba(52, 152, 219, 0.1);
    overflow-x: auto;
    min-width: 280px;
}

.reasoning-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    min-width: 80px;
    text-align: center;
}

.step-number {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(45deg, var(--secondary-color), #74b9ff);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 1.1rem;
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3);
    animation: stepPulse 2s ease-in-out infinite;
}

.step-text {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--primary-color);
    white-space: nowrap;
}

.reasoning-arrow {
    color: var(--secondary-color);
    font-size: 1.2rem;
    font-weight: bold;
    animation: arrowMove 2s ease-in-out infinite;
}

@keyframes stepPulse {
    0%, 100% { transform: scale(1); box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3); }
    50% { transform: scale(1.05); box-shadow: 0 6px 20px rgba(52, 152, 219, 0.4); }
}

@keyframes arrowMove {
    0%, 100% { transform: translateX(0); }
    50% { transform: translateX(3px); }
}

/* 生成演示样式 */
.generation-demo {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 2rem;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: var(--border-radius);
    border: 2px solid rgba(52, 152, 219, 0.1);
    min-width: 280px;
    flex-wrap: wrap;
    justify-content: center;
}

.algo-box {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    min-width: 100px;
    border: 2px solid transparent;
}

.algo-box:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
}

.algo-box.result {
    border-color: var(--secondary-color);
    background: linear-gradient(135deg, rgba(52, 152, 219, 0.05), rgba(52, 152, 219, 0.1));
}

.algo-title {
    font-size: 0.8rem;
    color: #666;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.algo-content {
    font-size: 1.1rem;
    color: var(--primary-color);
    font-weight: 600;
}

.generation-plus, .generation-arrow {
    color: var(--secondary-color);
    font-size: 1.5rem;
    font-weight: bold;
}

.generation-plus {
    animation: rotate 4s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.generation-arrow {
    animation: arrowMove 2s ease-in-out infinite;
}

.overview-image {
    margin: 2rem auto;
    text-align: center;
    max-width: 100%;
}

.full-width-image {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.full-width-image:hover {
    transform: scale(1.02);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.image-caption {
    margin-top: 1rem;
    color: #666;
    font-size: 0.9rem;
    font-style: italic;
}

/* Model Evaluation */
.model-evaluation {
    margin: 4rem 0;
}

.evaluation-table-container {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    overflow: hidden;
    margin: 2rem 0;
    box-shadow: var(--shadow);
    overflow-x: auto;
}

.evaluation-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    font-size: 0.9rem;
    min-width: 1200px;
}

.evaluation-table th {
    background: var(--card-bg);
    color: var(--primary-color);
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 1px;
    padding: 1.2rem 1rem;
    border-right: 1px solid #eee;
    border-bottom: 2px solid #eee;
    text-align: center;
    white-space: nowrap;
}

.evaluation-table th.basic-header {
    height: auto;
    vertical-align: middle;
}

.evaluation-table .algorithm-group {
    background: var(--card-bg) !important;
    color: var(--primary-color) !important;
    font-weight: 800 !important;
    font-size: 0.75rem;
    letter-spacing: 1.2px;
}

.evaluation-table td {
    padding: 1rem;
    border-right: 1px solid #eee;
    border-bottom: 1px solid #eee;
    text-align: center;
    transition: var(--transition);
}

.evaluation-table tr:hover td {
    background-color: rgba(52, 152, 219, 0.05);
}

.evaluation-table .best-score {
    font-weight: 700;
    color: var(--secondary-color);
}

.evaluation-table .model-type-label {
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.75rem;
    font-weight: 500;
    white-space: nowrap;
    display: inline-block;
}

.evaluation-table .model-type-closed {
    background-color: #ffebee;
    color: #c62828;
}

.evaluation-table .model-type-reasoning {
    background-color: #e8f5e9;
    color: #2e7d32;
}

.evaluation-table .model-type-opensource {
    background-color: #e3f2fd;
    color: #1565c0;
}

/* Evaluation Summary */
.evaluation-summary {
    margin-top: 2rem;
}

.key-findings {
    background: var(--background-color);
    border-left: 4px solid var(--secondary-color);
    padding: 2rem;
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

.key-findings h3 {
    color: var(--primary-color);
    font-size: 1.4rem;
    margin-bottom: 1.5rem;
}

.key-findings ul {
    list-style: none;
}

.key-findings li {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
    position: relative;
    line-height: 1.6;
    transition: all 0.3s ease;
    padding: 0.5rem 1rem;
    border-radius: 4px;
}

.key-findings li::before {
    content: "•";
    color: var(--secondary-color);
    position: absolute;
    left: 0;
    font-weight: bold;
    transition: all 0.3s ease;
}

.key-findings li:hover {
    background: rgba(52, 152, 219, 0.05);
    transform: translateX(10px);
}

.key-findings li:hover::before {
    color: var(--accent-color);
    transform: scale(1.2);
}

.highlight-score {
    color: var(--secondary-color);
    font-weight: 600;
    padding: 0.2rem 0.5rem;
    background: rgba(52, 152, 219, 0.1);
    border-radius: 4px;
    display: inline-block;
}

/* 表格样式 */
.cyber-table {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    overflow: hidden;
    margin: 2rem 0;
    box-shadow: var(--shadow);
}

.cyber-table table {
    width: 100%;
    border-collapse: collapse;
}

.cyber-table th {
    background: var(--card-bg);
    color: var(--primary-color);
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    border-bottom: 2px solid #eee;
}

.cyber-table td {
    padding: 1rem;
    border-bottom: 1px solid #eee;
    transition: var(--transition);
}

.cyber-table tr:hover td {
    background: rgba(52, 152, 219, 0.05);
}

/* 代码块样式 */
.code-block {
    background: #f1f1f1;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin: 1rem 0;
    font-family: 'Fira Code', monospace;
    color: var(--primary-color);
    overflow-x: auto;
    position: relative;
    white-space: pre-wrap;
    word-wrap: break-word;
    line-height: 1.6;
}

.code-block::before {
    content: attr(data-lang);
    position: absolute;
    top: 0.5rem;
    right: 1rem;
    font-size: 0.8rem;
    color: var(--secondary-color);
    opacity: 0.7;
}

/* 列表样式 */
.cyber-card ul {
    list-style: none;
    padding-left: 0;
}

.cyber-card li {
    margin: 0.8rem 0;
    padding-left: 2rem;
    position: relative;
    transition: var(--transition);
}

.cyber-card li::before {
    content: "•";
    color: var(--secondary-color);
    position: absolute;
    left: 0;
    font-weight: bold;
    transition: var(--transition);
}

.cyber-card li:hover::before {
    color: var(--accent-color);
    transform: scale(1.2);
}

.cyber-card ol {
    padding-left: 0;
    list-style: none;
    counter-reset: step-counter;
}

.cyber-card ol li {
    counter-increment: step-counter;
}

.cyber-card ol li::before {
    content: counter(step-counter) ".";
    color: var(--secondary-color);
    font-weight: 600;
}

/* 引用样式 */
.quote {
    border-left: 4px solid var(--secondary-color);
    padding-left: 1.5rem;
    margin: 2rem 0;
    font-style: italic;
    color: #555;
    position: relative;
}

.quote::before {
    content: '"';
    font-size: 4rem;
    color: var(--secondary-color);
    position: absolute;
    left: -1rem;
    top: -1rem;
    opacity: 0.3;
}

/* 团队介绍样式 */
.affiliations {
    color: #666;
    margin-top: 0.5rem;
    font-size: 0.9rem;
}

/* 新闻板块样式 */
.news-section {
    margin: 4rem 0;
}

.news-content {
    margin-top: 2rem;
}

.news-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
    align-items: stretch;
}

.featured-news {
    /* 占据左侧 */
}

.news-card.featured {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.news-card.featured:hover {
    transform: translateY(-5px) scale(1.01);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.news-image {
    position: relative;
    height: 200px;
    overflow: hidden;
    flex-shrink: 0;
}

.news-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.news-card.featured:hover .news-image img {
    transform: scale(1.05);
}

.news-badge {
    position: absolute;
    top: 1rem;
    left: 1rem;
    background: linear-gradient(45deg, var(--accent-color), #ff6b6b);
    color: white;
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(231, 76, 60, 0.3);
}

.news-info {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.news-info h3 {
    color: var(--primary-color);
    font-size: 1.2rem;
    margin-bottom: 1rem;
    line-height: 1.4;
}

.news-info p {
    color: #666;
    line-height: 1.6;
    margin-bottom: 1rem;
    flex: 1;
    font-size: 0.9rem;
}

.news-date {
    color: var(--secondary-color);
    font-size: 0.9rem;
    font-weight: 500;
    margin-top: auto;
}

.news-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    height: 100%;
}

.news-item {
    display: flex;
    gap: 1rem;
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 0.8rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
    flex: 1;
}

.news-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
}

.news-thumb {
    flex-shrink: 0;
    width: 80px;
    height: 60px;
    overflow: hidden;
    border-radius: var(--border-radius);
}

.news-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

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

.news-detail {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.news-detail h4 {
    color: var(--primary-color);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    line-height: 1.3;
}

.news-detail p {
    color: #666;
    font-size: 0.8rem;
    line-height: 1.4;
    margin-bottom: 0.5rem;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-detail .news-date {
    font-size: 0.8rem;
    margin-top: auto;
}

.news-more {
    text-align: center;
    margin-top: 2rem;
}

.more-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--secondary-color);
    text-decoration: none;
    font-weight: 500;
    padding: 0.8rem 2rem;
    border: 2px solid var(--secondary-color);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.more-link:hover {
    background: var(--secondary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.3);
}

.more-link i {
    transition: var(--transition);
}

.more-link:hover i {
    transform: translateX(5px);
}

/* Coming Soon 模态框样式 */
.coming-soon-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    backdrop-filter: blur(5px);
}

.coming-soon-modal.show {
    opacity: 1;
    visibility: visible;
}

.coming-soon-content {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 3rem;
    text-align: center;
    max-width: 400px;
    width: 90%;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    transform: scale(0.8);
    transition: all 0.3s ease;
    position: relative;
}

.coming-soon-modal.show .coming-soon-content {
    transform: scale(1);
}

.coming-soon-icon {
    font-size: 4rem;
    color: var(--accent-color);
    margin-bottom: 1.5rem;
    animation: rotate 2s linear infinite;
}

.coming-soon-content h3 {
    color: var(--primary-color);
    font-size: 2rem;
    margin-bottom: 1rem;
}

.coming-soon-content p {
    color: #666;
    margin-bottom: 1rem;
    line-height: 1.6;
}

.close-modal {
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    padding: 0.8rem 2rem;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 1rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.close-modal:hover {
    background: #c0392b;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(231, 76, 60, 0.3);
}

/* 论文按钮特殊样式 */
.paper-coming-soon {
    position: relative;
    overflow: hidden;
}

/* 移动端菜单 */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--secondary-color);
    font-size: 1.5rem;
    cursor: pointer;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .navbar {
        padding: 1rem;
    }

    .mobile-menu-toggle {
        display: block;
    }

    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 1rem;
        transform: translateY(-10px);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
        border-top: 1px solid rgba(52, 152, 219, 0.1);
    }

    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .cyber-card h2 {
    font-size: 1.6rem !important;  /* 视频介绍标题大小 */
    margin-bottom: 1.6rem !important;
    }
    
    .hero h1 {
    font-size: 2.8rem !important;    /* 原来是3rem */
    line-height: 1.4 !important;     /* 新增：优化行高 */
    }

    .hero-subtitle {
    font-size: 1.4rem !important;    /* 原来是1.8rem */
    line-height: 1.2 !important;     /* 新增：优化行高 */
    }

    .hero-description {
    font-size: 0.8rem;      /* 新增：缩小描述文字 */
    line-height: 1.6;     /* 新增：优化行高 */
    margin: 0 auto 2rem;  /* 新增：优化边距 */
    }
    .button-group {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }

    .cyber-button {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .feature-card {
        min-height: 260px;
    }

    main {
        padding: 5rem 1rem 2rem;
    }

    .video-container {
        height: 250px !important;  /* 适合手机的高度 */
        position: relative !important;
        overflow: hidden !important;
        border-radius: 8px !important;
    }

    .video-preview {
        width: 100% !important;
        height: 100% !important;
        position: relative !important;
        overflow: hidden !important;
    }

    .video-cover-image {
        width: 100% !important;
        height: 100% !important;
        object-fit: cover !important;  /* 保持比例，裁剪多余部分 */
        object-position: center !important;  /* 居中显示 */
        background: #1a1a1a !important;
    }

    .video-overlay {
        position: absolute !important;
        top: 0 !important;
        left: 0 !important;
        right: 0 !important;
        bottom: 0 !important;
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
        background: rgba(0, 0, 0, 0.4) !important;
        z-index: 100 !important;
    }



    .shield-icon {
        font-size: 3rem;  /* 从4rem减小到3rem */
    }

    .play-button {
        position: absolute !important;
        top: 50% !important;
        left: 50% !important;
        transform: translate(-50%, -50%) !important;  /* 精确居中 */
        display: flex !important;
        flex-direction: column !important;
        align-items: center !important;
        justify-content: center !important;
        width: 80px !important;
        height: 80px !important;
        background: rgba(255, 255, 255, 0.25) !important;
        border: 2px solid #3498db !important;
        border-radius: 50% !important;
        color: #3498db !important;
        cursor: pointer !important;
        backdrop-filter: blur(10px) !important;
        z-index: 200 !important;
        transition: all 0.3s ease !important;
    }       

    .play-button:hover {
        background: rgba(52, 152, 219, 0.3) !important;
        transform: translate(-50%, -50%) scale(1.1) !important;
        box-shadow: 0 0 20px rgba(52, 152, 219, 0.5) !important;
    }
    
    .play-button i {
        font-size: 1.2rem !important;
        margin-bottom: 0.3rem !important;
    }
    
    .play-button span {
        font-size: 0.7rem !important;
        font-weight: 600 !important;
        white-space: nowrap !important;
        text-align: center !important;
    }

    .shield-icon {
        font-size: 5rem;
    }

     

    .video-frame video {
        width: 95%;
        height: 70%;
    }

    .close-video {
        top: 1rem;
        right: 1rem;
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }

    .evaluation-table-container {
        margin: 1rem -1rem;
        border-radius: 0;
    }

    .evaluation-table {
        font-size: 0.8rem;
        min-width: 900px;
    }

    .evaluation-table th {
        padding: 0.8rem 0.5rem;
        font-size: 0.7rem;
    }

    .evaluation-table td {
        padding: 0.6rem 0.4rem;
    }

    .evaluation-table .model-type-label {
        font-size: 0.65rem;
        padding: 0.2rem 0.6rem;
    }

    .key-findings {
        margin: 1rem -1rem;
        border-radius: 0;
        border-left: none;
        border-top: 4px solid var(--secondary-color);
        padding: 1rem;
    }

    .news-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .news-image {
        height: 180px;
    }
    
    .news-item {
        flex-direction: column;
        gap: 0.8rem;
    }
    
    .news-thumb {
        width: 100%;
        height: 120px;
    }
    
    .news-info h3 {
        font-size: 1.1rem;
    }
    
    .news-detail h4 {
        font-size: 0.95rem;
    }

    /* 核心能力响应式 */
    .tab-nav {
        flex-wrap: wrap;
        gap: 0.25rem;
    }
    
    .tab-button {
        padding: 0.8rem 1rem;
        font-size: 0.9rem;
        min-width: auto;
        flex: 1;
    }
    
    .capability-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .decrypt-demo, .analysis-chart, .reasoning-flow, .generation-demo {
        min-width: auto;
        width: 100%;
    }
    
    .reasoning-flow {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .reasoning-arrow {
        transform: rotate(90deg);
    }
    
    .generation-demo {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .generation-arrow {
        transform: rotate(90deg);
    }
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 5px;
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}/* Global styles */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --text-color: #333;
    --background-color: #f8f9fa;
    --max-width: 1100px;
    --border-radius: 8px;
    --card-bg: white;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    background-image: 
        radial-gradient(at 40% 20%, rgba(52, 152, 219, 0.1) 0px, transparent 50%),
        radial-gradient(at 80% 0%, rgba(44, 62, 80, 0.1) 0px, transparent 50%),
        radial-gradient(at 0% 50%, rgba(231, 76, 60, 0.1) 0px, transparent 50%);
    background-attachment: fixed;
    overflow-x: hidden;
}

/* 固定导航栏样式 - 完全固定无过渡 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    padding: 1rem 2rem;
    background: transparent;
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 1000;
    /* 完全移除所有过渡效果 */
    box-shadow: none;
}

/* 滚动时的导航栏样式 */
.navbar.scrolled {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    border-bottom: 1px solid rgba(52, 152, 219, 0.1);
}

/* 任何滚动都即时隐藏导航栏 */
.navbar.hidden {
    transform: translateY(-100%);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Logo点击样式 */
.logo-section {
    display: flex;
    align-items: center;
    gap: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    padding: 0.5rem;
    border-radius: 8px;
    user-select: none;
}

.logo-section:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
}

.logo-section:active {
    transform: translateY(0);
}

.logo-icon {
    font-size: 2rem;
    color: var(--secondary-color);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

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

.nav-link {
    color: var(--text-color);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
    position: relative;
}

.nav-link:hover {
    color: var(--secondary-color);
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
}

.nav-link.active {
    color: var(--secondary-color);
    background: rgba(255, 255, 255, 0.15);
}

/* Main content */
main {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 6rem 2rem 2rem;
}

/* 首页英雄区域 */
.hero {
    text-align: center;
    padding: 4rem 0;
    max-width: 900px;
    margin: 0 auto;
    animation: fadeInUp 1s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-icon {
    font-size: 4rem;
    color: var(--secondary-color);
    margin-bottom: 2rem;
    animation: heroFloat 4s ease-in-out infinite;
}

@keyframes heroFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.hero h1 {
    font-size: 4.5rem;
    margin-bottom: 0.8rem;
    color: var(--primary-color);
    font-weight: 700;
    letter-spacing: -0.02em;
    position: relative;
    display: inline-block;
}

.hero h1::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: linear-gradient(to right, var(--secondary-color), var(--accent-color));
    border-radius: 2px;
}

.hero-subtitle {
    font-size: 2.5rem;
    max-width: 900px;
    text-align: center;
    margin: 0 auto 2rem;
    background: linear-gradient(120deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 600;
}

.hero-description {
    font-size: 1.2rem;
    color: #555;
    max-width: 800px;
    margin: 0 auto 3rem;
    line-height: 1.8;
}

/* 按钮样式 */
.cyber-button {
    display: inline-flex;
    align-items: center;
    gap: 0.8rem;
    padding: 1rem 2rem;
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: var(--border-radius);
    font-weight: 500;
    transition: var(--transition);
    border: 2px solid var(--primary-color);
    min-width: 160px;
    justify-content: center;
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.cyber-button::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
}

.cyber-button:hover::before {
    width: 300px;
    height: 300px;
}

.cyber-button:hover {
    background-color: transparent;
    color: var(--primary-color);
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.button-group {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin: 3rem 0;
    flex-wrap: wrap;
}

/* 内容页面 */
.content-page {
    display: none;
    animation: fadeInUp 0.6s ease-out;
}

.content-page.active {
    display: block;
}

/* 卡片样式 */
.cyber-card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin: 2rem 0;
    box-shadow: var(--shadow);
    transition: var(--transition);
    animation: scaleIn 0.8s ease-out;
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.cyber-card:hover {
    transform: translateY(-5px) scale(1.01);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.cyber-card h2 {
    display: flex;
    align-items: center;
    gap: 1rem;
    color: var(--primary-color);
    font-size: 2rem;
    margin-bottom: 2rem;
    position: relative;
    padding-bottom: 0.5rem;
}

.cyber-card h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background: var(--secondary-color);
    transition: all 0.3s ease;
}

.cyber-card:hover h2::after {
    width: 100px;
    background: var(--accent-color);
}

.cyber-card h2 i {
    color: var(--secondary-color);
    transition: var(--transition);
}

.cyber-card:hover h2 i {
    transform: rotate(360deg) scale(1.1);
    color: var(--accent-color);
}

.cyber-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.cyber-card h3 i {
    color: var(--secondary-color);
    transition: var(--transition);
}

/* 特性网格 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.feature-card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 2rem;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    min-height: 280px;
}

.feature-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.feature-icon {
    font-size: 3rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
    transition: var(--transition);
}

.feature-card:hover .feature-icon {
    color: var(--accent-color);
    transform: scale(1.2);
}

.feature-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.feature-card p {
    flex-grow: 1;
    margin-bottom: 1rem;
    color: #555;
}

/* 视频展示区域 */
.video-showcase {
    margin: 4rem 0;
}

.video-container {
    position: relative;
    margin: 2rem 0;
    border-radius: var(--border-radius);
    overflow: hidden;
    height: 450px;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border: 1px solid rgba(52, 152, 219, 0.2);
}

.video-background {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.shield-icon {
    position: absolute;
    font-size: 8rem;
    color: var(--secondary-color);
    opacity: 0.1;
    animation: shieldPulse 3s ease-in-out infinite;
}

@keyframes shieldPulse {
    0%, 100% { transform: scale(1) rotate(0deg); opacity: 0.1; }
    50% { transform: scale(1.1) rotate(5deg); opacity: 0.2; }
}
.video-preview {
    /* 现有样式保持不变 */
    min-height: 500px;  /* 确保最小高度 */
}
.video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex !important;    /* 强制显示 */
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.3);  /* 适当的遮罩 */
    z-index: 100;               /* 确保在图片上方 */
}

.play-button {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.25);
    border: 2px solid var(--secondary-color);
    border-radius: 50%;
    color: var(--secondary-color);
    cursor: pointer;
    transition: var(--transition);
    width: 120px;
    height: 120px;
    justify-content: center;
    backdrop-filter: blur(10px);
    z-index: 20; 

}

.play-button:hover {
    background: rgba(52, 152, 219, 0.2);
    transform: scale(1.1);
    box-shadow: 0 0 20px rgba(52, 152, 219, 0.3);
}

.play-button i {
    font-size: 2rem;
    transition: var(--transition);
}

.play-button:hover i {
    transform: scale(1.2);
    color: var(--accent-color);
}

.play-button span {
    font-size: 0.9rem;
    font-weight: 600;
    white-space: nowrap;
}

/* 视频播放框架 */
.video-frame {
    position: fixed;
    top: 0;
    left: 0;
}