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

:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --accent-color: #f59e0b;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
}

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    overflow-x: hidden;
}

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

/* 导航栏 */
.header {
    background: var(--bg-white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
}

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

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

.logo-image {
    height: 60px;
    width: auto;
    max-width: 120px;
    object-fit: contain;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo h1 {
    color: var(--primary-color);
    font-size: 1.8rem;
    margin-bottom: 0.2rem;
}

.logo p {
    color: var(--text-light);
    font-size: 0.9rem;
}

.nav {
    display: flex;
    gap: 2rem;
}

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

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

.nav a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s;
}

.nav a:hover::after {
    width: 100%;
}

/* 主页横幅 */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 120px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><circle cx="50" cy="50" r="2" fill="white" opacity="0.1"/></svg>');
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    animation: fadeInUp 1s ease-out;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    opacity: 0.95;
    animation: fadeInUp 1s ease-out 0.2s both;
}

.hero-description {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    animation: fadeInUp 1s ease-out 0.4s both;
}

.btn-primary {
    display: inline-block;
    padding: 15px 40px;
    background: var(--accent-color);
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-weight: bold;
    font-size: 1.1rem;
    transition: all 0.3s;
    box-shadow: var(--shadow-lg);
    animation: fadeInUp 1s ease-out 0.6s both;
}

.btn-primary:hover {
    background: #d97706;
    transform: translateY(-2px);
    box-shadow: 0 15px 30px rgba(245, 158, 11, 0.4);
}

/* 节标题 */
.section-title {
    text-align: center;
    font-size: 2.5rem;
    color: var(--text-dark);
    margin-bottom: 3rem;
    position: relative;
    padding-bottom: 1rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--primary-color);
    border-radius: 2px;
}

/* 服务项目 */
.services {
    padding: 80px 0;
    background: var(--bg-light);
}

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

.service-card {
    background: var(--bg-white);
    padding: 2.5rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: all 0.3s;
    border: 2px solid transparent;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.service-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
}

.service-card h3 {
    color: var(--text-dark);
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

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

/* 图片展示 */
.gallery {
    padding: 80px 0;
    background: var(--bg-white);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.gallery-item {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.3s;
    background: var(--bg-white);
}

.gallery-item:hover {
    transform: scale(1.05);
}

.gallery-image {
    width: 100%;
    height: 300px;
    object-fit: cover;
    display: block;
    transition: transform 0.3s;
}

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

.image-placeholder {
    width: 100%;
    height: 250px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
    font-weight: bold;
}

.gallery-note {
    text-align: center;
    color: var(--text-light);
    font-style: italic;
}

/* 视频展示 */
.videos {
    padding: 80px 0;
    background: var(--bg-light);
}

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

.video-btn {
    background: var(--bg-white);
    border: 2px solid var(--primary-color);
    border-radius: 15px;
    padding: 3rem 2rem;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    min-height: 180px;
    position: relative;
    overflow: hidden;
}

/* 背景图片覆盖层 */
.video-btn-with-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    transition: background 0.3s;
    z-index: 1;
}

.video-btn-with-bg:hover::before {
    background: rgba(37, 99, 235, 0.7);
}

.video-btn-with-bg {
    border: none;
}

.video-btn-icon,
.video-btn p {
    position: relative;
    z-index: 2;
}

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

.video-btn-icon {
    font-size: 3.5rem;
    color: var(--primary-color);
    transition: all 0.3s;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
}

.video-btn-with-bg .video-btn-icon {
    color: white;
}

.video-btn:hover .video-btn-icon {
    color: white;
    transform: scale(1.1);
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.5));
}

.video-btn p {
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--text-dark);
    margin: 0;
    transition: color 0.3s;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.video-btn-with-bg p {
    color: white;
}

.video-btn:hover p {
    color: white;
}

/* 视频播放模态框 */
.video-modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(5px);
    animation: fadeIn 0.3s;
}

.video-modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.video-modal-content {
    position: relative;
    width: 90%;
    max-width: 900px;
    margin: auto;
    animation: slideDown 0.3s;
}

.video-modal-close {
    position: absolute;
    top: -40px;
    right: 0;
    color: white;
    font-size: 3rem;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s;
    z-index: 2001;
    line-height: 1;
}

.video-modal-close:hover {
    color: var(--accent-color);
}

.modal-video-player {
    width: 100%;
    height: auto;
    border-radius: 10px;
    display: block;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

/* 服务范围 */
.coverage {
    padding: 80px 0;
    background: var(--bg-light);
}

.coverage-intro {
    text-align: center;
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 3rem;
}

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

.coverage-group {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow);
}

.coverage-group h3 {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--primary-color);
}

.coverage-group ul {
    list-style: none;
}

.coverage-group li {
    padding: 0.8rem 0;
    color: var(--text-dark);
    font-size: 1.1rem;
    border-bottom: 1px solid #e5e7eb;
    position: relative;
    padding-left: 1.5rem;
}

.coverage-group li::before {
    content: '📍';
    position: absolute;
    left: 0;
}

.coverage-group li:last-child {
    border-bottom: none;
}

/* 服务优势 */
.advantages {
    padding: 80px 0;
    background: var(--bg-white);
}

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

.advantage-item {
    text-align: center;
    padding: 2rem;
}

.advantage-icon {
    font-size: 3.5rem;
    margin-bottom: 1rem;
}

.advantage-item h3 {
    color: var(--text-dark);
    font-size: 1.3rem;
    margin-bottom: 0.8rem;
}

.advantage-item p {
    color: var(--text-light);
}

/* 联系我们 */
.contact {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
}

.contact .section-title {
    color: white;
}

.contact .section-title::after {
    background: var(--accent-color);
}

.contact-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 3rem;
    margin-top: 3rem;
}

.contact-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 3rem;
    border-radius: 20px;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.contact-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
}

.contact-card h3 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
}

.phone-number {
    display: block;
    font-size: 2rem;
    color: var(--accent-color);
    text-decoration: none;
    font-weight: bold;
    margin-bottom: 1rem;
    transition: transform 0.3s;
}

.phone-number:hover {
    transform: scale(1.1);
}

.contact-note {
    opacity: 0.9;
    font-size: 1rem;
}

.contact-info {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 2.5rem;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.contact-info h3 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
}

.contact-info ul {
    list-style: none;
}

.contact-info li {
    padding: 1rem 0;
    font-size: 1.1rem;
    line-height: 1.8;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    padding-left: 1.5rem;
    position: relative;
}

.contact-info li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-weight: bold;
}

.contact-info li:last-child {
    border-bottom: none;
}

/* 页脚 */
.footer {
    background: var(--text-dark);
    color: white;
    text-align: center;
    padding: 2rem 0;
}

.footer .icp-filing {
    margin-top: 0.5rem;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.8);
}

.footer .icp-filing a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.3s;
}

.footer .icp-filing a:hover {
    color: var(--accent-color);
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }

    .header .container {
        flex-direction: column;
        gap: 1rem;
    }

    .logo {
        gap: 0.8rem;
    }

    .logo-image {
        height: 60px;
        max-width: 120px;
        width: auto;
    }

    .logo h1 {
        font-size: 1.4rem;
    }

    .logo p {
        font-size: 0.85rem;
    }

    .nav {
        gap: 1rem;
        flex-wrap: wrap;
        justify-content: center;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .services-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    .coverage-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    .service-card {
        padding: 1.5rem;
    }

    .service-icon {
        font-size: 3rem;
        margin-bottom: 1rem;
    }

    .service-card h3 {
        font-size: 1.2rem;
        margin-bottom: 0.8rem;
    }

    .service-card p {
        font-size: 0.9rem;
    }

    .coverage-group {
        padding: 1.5rem;
    }

    .coverage-group h3 {
        font-size: 1.2rem;
        margin-bottom: 1rem;
    }

    .coverage-group li {
        font-size: 0.95rem;
        padding: 0.6rem 0;
        padding-left: 1.8rem;
    }
    
    .coverage-group li::before {
        left: 0.2rem;
    }

    .advantage-item {
        padding: 1.5rem;
    }

    .advantage-icon {
        font-size: 2.5rem;
        margin-bottom: 0.8rem;
    }

    .advantage-item h3 {
        font-size: 1.1rem;
        margin-bottom: 0.6rem;
    }

    .advantage-item p {
        font-size: 0.9rem;
    }

    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
    }

    .gallery-image {
        height: 200px;
    }

    .videos-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    .video-btn {
        padding: 2rem 1.5rem;
        min-height: 140px;
    }

    .video-btn-icon {
        font-size: 2.5rem;
    }

    .video-btn p {
        font-size: 1rem;
    }

    .video-modal-content {
        width: 95%;
    }

    .video-modal-close {
        top: -35px;
        font-size: 2.5rem;
    }

    .videos {
        padding: 50px 0;
    }

    .contact-content {
        grid-template-columns: 1fr;
    }

    .phone-number {
        font-size: 1.5rem;
    }

    /* 手机端section间距优化 */
    .services,
    .gallery,
    .videos,
    .coverage,
    .advantages,
    .contact {
        padding: 50px 0;
    }
}