/* ========== 基本样式重置 ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
    overflow-x: hidden;
}

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

/* ========== 通用样式 ========== */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 15px;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, #3498db, #2980b9);
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.2rem;
    color: #7f8c8d;
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.8;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 6px;
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition: all 0.3s ease;
    text-align: center;
    pointer-events: auto;
    position: relative;
    z-index: 10;
}

.btn-primary {
    background: linear-gradient(135deg, #3498db, #2980b9);
    color: white;
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.2);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(52, 152, 219, 0.3);
    background: linear-gradient(135deg, #2980b9, #1f618d);
}

.btn-secondary {
    background: transparent;
    color: #3498db;
    border: 2px solid #3498db;
}

.btn-secondary:hover {
    background: rgba(52, 152, 219, 0.1);
    transform: translateY(-3px);
}

/* ========== 导航栏 ========== */
.main-header {
    background: #2c3e50;
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    height: 80px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    font-size: 28px;
    color: white;
}

.logo-text {
    font-size: 24px;
    font-weight: bold;
    color: white;
    letter-spacing: 0.5px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 40px;
    margin: 0;
    padding: 0;
}

.nav-menu a {
    text-decoration: none;
    color: white;
    font-weight: 600;
    padding: 8px 16px;
    border-radius: 6px;
    transition: all 0.3s ease;
    font-size: 16px;
    position: relative;
}

.nav-menu a:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    background: white;
    left: 50%;
    bottom: 0;
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav-menu a:hover::after {
    width: 80%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

.contact-btn {
    background: linear-gradient(135deg, #3498db, #2980b9);
    color: white;
    border: none;
    padding: 10px 24px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.2);
}

.contact-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(52, 152, 219, 0.3);
    background: linear-gradient(135deg, #2980b9, #1f618d);
}

.mobile-menu-btn {
    display: none;
    font-size: 24px;
    cursor: pointer;
    color: white;
}

/* ========== 首页 ========== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    position: relative;
    overflow: hidden;
    padding-top: 80px;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 900px;
    margin: 0 auto;
    padding: 0 20px;
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    line-height: 1.2;
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.3);
    font-weight: 700;
    animation: fadeInUp 1s ease;
}

.hero-subtitle {
    font-size: 1.4rem;
    margin-bottom: 2.5rem;
    opacity: 0.9;
    font-weight: 300;
    line-height: 1.8;
    animation: fadeInUp 1s ease 0.2s both;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 1s ease 0.4s both;
    justify-content: center;
}

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

/* ========== 行业项目 ========== */
.projects-section {
    padding: 100px 0;
    background-color: white;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.project-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    transition: all 0.4s ease;
    border: 1px solid #f0f0f0;
    display: flex;
    flex-direction: column;
    cursor: pointer;
    position: relative;
    pointer-events: auto;
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
    border-color: #3498db;
}

.project-image {
    width: 100%;
    height: 0;
    padding-top: 66.67%; /* 3:2比例 */
    position: relative;
    overflow: hidden;
    background: #f8f9fa;
    border-radius: 8px 8px 0 0;
    margin-bottom: 1.5rem;
}

.project-image img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.image-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: white;
}

.medical-bg { background: linear-gradient(135deg, #ff6b6b, #ee5a24); }
.government-bg { background: linear-gradient(135deg, #3498db, #2980b9); }
.tourism-bg { background: linear-gradient(135deg, #9b59b6, #8e44ad); }
.industrial-bg { background: linear-gradient(135deg, #2ecc71, #27ae60); }
.retail-bg { background: linear-gradient(135deg, #f39c12, #e67e22); }
.vr-bg { background: linear-gradient(135deg, #1abc9c, #16a085); }

.project-content {
    padding: 25px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.project-title {
    font-size: 1.6rem;
    margin-bottom: 10px;
    color: #2c3e50;
    font-weight: 700;
}

.project-desc {
    color: #7f8c8d;
    margin-bottom: 15px;
    font-size: 1.1rem;
    line-height: 1.6;
    flex-grow: 1;
    min-height: 60px;
}

.project-features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.feature-tag {
    background: #f8f9fa;
    color: #3498db;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    border: 1px solid #e9ecef;
    transition: all 0.3s ease;
}

.feature-tag:hover {
    background: #3498db;
    color: white;
    border-color: #3498db;
}

.project-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 0;
    background: linear-gradient(135deg, #3498db, #2980b9);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    width: 100%;
    pointer-events: auto;
    position: relative;
    z-index: 10;
    margin-top: auto;
}

.project-btn:hover {
    background: linear-gradient(135deg, #2980b9, #1f618d);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(52, 152, 219, 0.3);
}

.project-btn i {
    transition: transform 0.3s ease;
}

.project-btn:hover i {
    transform: translateX(5px);
}

/* ========== 特色板块 ========== */
.features-section {
    padding: 100px 0;
    background-color: #f8f9fa;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.feature-card {
    background: white;
    border-radius: 12px;
    padding: 40px 30px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    transition: all 0.4s ease;
    border: 1px solid #f0f0f0;
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: pointer;
    pointer-events: auto;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
    border-color: #4CAF50;
}

.feature-icon {
    font-size: 3.5rem;
    margin-bottom: 20px;
    color: #2ecc71;
    display: block;
}

.feature-title {
    font-size: 1.6rem;
    margin-bottom: 15px;
    color: #333;
    font-weight: 700;
}

.feature-desc {
    color: #666;
    margin-bottom: 25px;
    font-size: 1.1rem;
    line-height: 1.6;
    flex-grow: 1;
}

.feature-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 30px;
    background: linear-gradient(135deg, #4CAF50, #8BC34A);
    color: white;
    text-decoration: none;
    border-radius: 6px;
    transition: all 0.3s ease;
    font-weight: 600;
    font-size: 1rem;
    letter-spacing: 0.5px;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(76, 175, 80, 0.2);
    width: 100%;
    max-width: 200px;
    pointer-events: auto;
    position: relative;
    z-index: 10;
}

.feature-btn:hover {
    background: linear-gradient(135deg, #43a047, #7cb342);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(76, 175, 80, 0.3);
}

.feature-btn i {
    transition: transform 0.3s ease;
}

.feature-btn:hover i {
    transform: translateX(5px);
}

/* ========== 联系我们 ========== */
.contact-section {
    padding: 100px 0;
    background-color: white;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: start;
}

.contact-info {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 25px;
    background: #f8f9fa;
    border-radius: 12px;
    transition: all 0.3s ease;
    border: 1px solid #eee;
}

.contact-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.08);
    border-color: #3498db;
}

.contact-icon {
    font-size: 2rem;
    color: #3498db;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: white;
    border-radius: 50%;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.contact-details h4 {
    font-size: 1.4rem;
    margin-bottom: 8px;
    color: #333;
    font-weight: 600;
}

.contact-details p {
    color: #666;
    font-size: 1.1rem;
    line-height: 1.6;
    margin: 0;
}

.contact-form {
    padding: 40px;
    background: #f8f9fa;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.contact-form h3 {
    font-size: 1.8rem;
    margin-bottom: 30px;
    color: #2c3e50;
    font-weight: 600;
}

.form-group {
    margin-bottom: 20px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 15px 20px;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: white;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* ========== 页脚 ========== */
.main-footer {
    background: linear-gradient(135deg, #2c3e50, #34495e);
    color: white;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 50px;
    margin-bottom: 40px;
}

.footer-brand .logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
}

.footer-brand p {
    opacity: 0.8;
    line-height: 1.8;
    font-size: 1.1rem;
}

.footer-links h4,
.footer-contact h4 {
    font-size: 1.4rem;
    margin-bottom: 20px;
    font-weight: 600;
}

.footer-links ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 1.1rem;
}

.footer-links a:hover {
    color: white;
    padding-left: 5px;
}

.footer-contact p {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
    color: rgba(255, 255, 255, 0.8);
    font-size: 1.1rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
    font-size: 1rem;
}

/* ========== 弹窗 ========== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2000;
    overflow-y: auto;
    padding: 20px;
}

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    z-index: 2001;
}

.modal-content {
    position: relative;
    background-color: white;
    margin: 2rem auto;
    padding: 3rem;
    max-width: 900px;
    width: 90%;
    border-radius: 20px;
    max-height: 85vh;
    overflow-y: auto;
    z-index: 2002;
    animation: modalSlideIn 0.4s ease;
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.3);
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-close {
    position: absolute;
    top: 1.5rem;
    right: 2rem;
    font-size: 1.8rem;
    cursor: pointer;
    color: #999;
    transition: color 0.3s;
    background: none;
    border: none;
    line-height: 1;
    padding: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
}

.modal-close:hover {
    color: #333;
}

.modal-header h2 {
    color: #333;
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 3px solid #667eea;
    font-size: 2.2rem;
    font-weight: 700;
}

.modal-body h3 {
    color: #333;
    margin: 2rem 0 1.5rem;
    font-size: 1.8rem;
    font-weight: 600;
}

.modal-body h4 {
    color: #2c3e50;
    margin: 1.5rem 0 1rem;
    font-size: 1.4rem;
    font-weight: 600;
}

.modal-body .highlight {
    background-color: #f0f9ff;
    border-left: 4px solid #3498db;
    padding: 1.5rem;
    border-radius: 8px;
    margin-bottom: 2rem;
    font-size: 1.2rem;
    line-height: 1.7;
    color: #333;
}

/* ========== 视频弹窗 ========== */
.video-modal .modal-content {
    max-width: 800px;
    text-align: center;
}

.video-player-container {
    width: 100%;
    margin-bottom: 1.5rem;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

#videoPlayer {
    width: 100%;
    height: auto;
    max-height: 450px;
    display: block;
    background: #000;
}

#videoTitle {
    color: #333;
    font-size: 1.5rem;
    margin: 0;
    font-weight: 600;
}

/* ========== 回到顶部按钮 ========== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #3498db, #2980b9);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
    box-shadow: 0 5px 15px rgba(52, 152, 219, 0.3);
    pointer-events: auto;
}

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

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(52, 152, 219, 0.4);
}

/* ========== 视频缩略图 ========== */
.thumb-img {
    width: 100%;             /* 恢复为100% */
    padding-top: 66.67%;     /* 恢复3:2比例 (2/3=0.6667) */
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.1);
    margin-bottom: 1rem;
    background: #f8f9fa;
}

.thumb-img img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.video-thumb:hover .thumb-img img {
    transform: scale(1.05);
}

.play-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    background: rgba(255, 87, 34, 0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.8rem;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(255, 87, 34, 0.3);
    opacity: 0;
    z-index: 2;
}

.video-thumb:hover .play-overlay {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1.1);
}

/* ========== 响应式设计 ========== */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 2.8rem;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .navbar {
        padding: 15px 0;
    }
    
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: #2c3e50;
        flex-direction: column;
        gap: 0;
        padding: 20px 0;
        box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    }
    
    .nav-menu a {
        color: white;
        padding: 15px 20px;
        display: block;
        text-decoration: none;
        font-weight: 600;
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .mobile-menu-btn {
        display: block;
        color: white;
    }
    
    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .projects-grid,
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 100px 20px 60px;
    }
    
    .hero-title {
        font-size: 1.8rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
    }
    
    .modal-content {
        padding: 1.5rem;
    }
}

/* ========== 确保所有交互元素可点击 ========== */
.project-card *,
.feature-card *,
.modal-content * {
    pointer-events: auto;
}

/* 确保按钮在移动设备上容易点击 */
.project-btn,
.feature-btn,
.btn-primary,
.btn-secondary,
.contact-btn {
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    min-height: 44px;
    min-width: 44px;
}

/* 修复移动端菜单的z-index */
@media (max-width: 768px) {
    .nav-menu {
        z-index: 1001;
    }
}
/* ========== 修复视频缩略图播放按钮显示 ========== */

/* 确保缩略图容器定位正确 */
.thumb-img {
    position: relative;
    width: 50%;
    padding-top: 33.33%;  /* 3:2比例的50% */
    margin: 0 auto 1rem;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.1);
}

/* 播放按钮居中显示 */
.thumb-img .play-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 50px;
    height: 50px;
    background: rgba(255, 87, 34, 0.95);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.8rem;
    font-weight: bold;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3), 0 0 0 3px rgba(255, 87, 34, 0.3);
    border: 3px solid white;
    z-index: 10;
    opacity: 1;
    pointer-events: none;
    transition: all 0.3s ease;
    cursor: pointer;
}

/* 鼠标悬停效果 */
.video-thumb:hover .play-overlay {
    transform: translate(-50%, -50%) scale(1.2);
    background: rgba(255, 87, 34, 1);
    box-shadow: 0 8px 25px rgba(255, 87, 34, 0.5), 0 0 0 4px rgba(255, 87, 34, 0.4);
}

/* 确保图片正确显示 */
.thumb-img img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
    border-radius: 8px;
}

.video-thumb:hover .thumb-img img {
    transform: scale(1.05);
}

/* 弹窗内缩略图样式 */
.modal-content .thumb-img {
    width: 100%;             /* 恢复为100% */
    padding-top: 66.67%;     /* 恢复3:2比例 */
    max-width: none;         /* 移除最大宽度限制 */
    margin: 0 auto 1rem;
}

/* 弹窗内播放按钮 */
.modal-content .play-overlay {
    opacity: 1 !important;
    display: flex !important;
    width: 40px;
    height: 40px;
    font-size: 1.5rem;
}