/* 
 * 湖南明讯低空经济发展有限公司门户网站样式
 * 科技风格设计
 */

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

:root {
    /* 科技风格配色 */
    --primary-color: #0066ff;
    --primary-dark: #0052cc;
    --secondary-color: #00d4ff;
    --accent-color: #ff6b6b;
    --dark-color: #0a192f;
    --light-color: #f8f9fa;
    --gray-color: #6c757d;
    --gray-light: #e9ecef;
    
    /* 渐变背景 */
    --gradient-primary: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    --gradient-dark: linear-gradient(135deg, var(--dark-color), #1a365d);
    
    /* 阴影 */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
    
    /* 边框 */
    --border-radius: 8px;
    --border-radius-lg: 12px;
    
    /* 字体 */
    --font-primary: 'Roboto', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --font-heading: 'Orbitron', 'Roboto', sans-serif;
}

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

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: #333;
    background-color: var(--light-color);
    overflow-x: hidden;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: var(--border-radius);
    font-weight: 500;
    text-decoration: none;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    font-size: 1rem;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

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

/* 头部导航 */
.header {
    background: rgba(10, 25, 47, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 0;
}

.logo a {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: white;
}

.logo-icon {
    font-size: 2rem;
    color: var(--secondary-color);
    margin-right: 10px;
}

.logo-text h1 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-text p {
    font-size: 0.8rem;
    color: var(--gray-color);
    margin: 0;
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: 30px;
}

.main-nav a i { margin-right: 6px; }

.main-nav a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    padding: 8px 0;
    position: relative;
    transition: color 0.3s ease;
}

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

.main-nav a.active {
    color: var(--secondary-color);
}

.main-nav a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
}

.header-actions .btn-phone {
    background: rgba(0, 102, 255, 0.2);
    color: white;
    padding: 10px 20px;
    border-radius: var(--border-radius);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
}

.header-actions .btn-phone:hover {
    background: rgba(0, 102, 255, 0.3);
    transform: translateY(-2px);
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
}

/* 轮播图区域 */
.hero-slider {
    position: relative;
    height: 600px;
    margin-top: 70px;
    overflow: hidden;
}

.slider-container {
    height: 100%;
    position: relative;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    opacity: 0;
    transition: opacity 1s ease;
}

.slide.active {
    opacity: 1;
}

.slide-content {
    max-width: 600px;
    color: white;
}

.slide-title {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
}

.slide-description {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

.slider-controls {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    transform: translateY(-50%);
    display: flex;
    justify-content: space-between;
    padding: 0 20px;
}

.slider-controls button {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.slider-controls button:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

.slider-dots {
    position: absolute;
    bottom: 30px;
    left: 0;
    right: 0;
    display: flex;
    justify-content: center;
    gap: 10px;
}

/* 通用区块样式 */
.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 10px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    color: var(--gray-color);
    font-size: 1.1rem;
}

/* 关于我们区块 */
.about-section {
    padding: 100px 0;
    background: white;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-text h3 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--dark-color);
}

.about-text p {
    margin-bottom: 20px;
    color: var(--gray-color);
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin: 40px 0;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.stat-label {
    color: var(--gray-color);
    font-size: 0.9rem;
}

.about-image .tech-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.grid-item {
    background: var(--gradient-dark);
    padding: 30px;
    border-radius: var(--border-radius);
    text-align: center;
    color: white;
    transition: transform 0.3s ease;
}

.grid-item:hover {
    transform: translateY(-5px);
}

.grid-item i {
    font-size: 2.5rem;
    margin-bottom: 15px;
    color: var(--secondary-color);
}

.grid-item span {
    display: block;
    font-size: 1rem;
}

/* 服务区块 */
.services-section {
    padding: 100px 0;
    background: var(--gradient-dark);
    color: white;
}

.services-section .section-title,
.services-section .section-subtitle {
    color: white;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.service-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 40px 30px;
    border-radius: var(--border-radius);
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.service-card:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.15);
    box-shadow: var(--shadow-xl);
}

.service-icon {
    font-size: 3rem;
    color: var(--secondary-color);
    margin-bottom: 20px;
}

.service-title {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: white;
}

.service-description {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 20px;
    line-height: 1.6;
}

.service-link {
    color: var(--secondary-color);
    text-decoration: none;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    transition: gap 0.3s ease;
}

.service-link:hover {
    gap: 10px;
}

/* 新闻区块 */
.news-section {
    padding: 100px 0;
    background: white;
}

.news-section .section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    text-align: left;
}

.view-all {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

/* 新闻中心样式 */
.news-center-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
}

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

.news-card {
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.news-image {
    height: 200px;
    background-size: cover;
    background-position: center;
    position: relative;
}

.default-image {
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.default-image i {
    font-size: 4rem;
    color: white;
    opacity: 0.8;
}

.news-content {
    padding: 25px;
}

.news-meta {
    display: flex;
    justify-content: space-between;
    margin-bottom: 15px;
    font-size: 0.9rem;
}

.news-category {
    color: var(--primary-color);
    font-weight: 500;
}

.news-date {
    color: var(--gray-color);
}

.news-title {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--dark-color);
    line-height: 1.4;
}

.news-excerpt {
    color: var(--gray-color);
    margin-bottom: 20px;
    line-height: 1.6;
}

.news-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

/* 合作伙伴区块 */
.partners-section {
    padding: 80px 0;
    background: var(--gray-light);
}

.partners-slider {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 40px;
}

.partner-logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    color: var(--dark-color);
    font-weight: 500;
    transition: transform 0.3s ease;
}

.partner-logo:hover {
    transform: translateY(-5px);
}

.partner-logo i {
    font-size: 3rem;
    color: var(--primary-color);
}

/* 底部样式 */
.footer {
    background: var(--dark-color);
    color: white;
    padding: 80px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 50px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.footer-logo .logo-icon {
    font-size: 2.5rem;
    color: var(--secondary-color);
}

.footer-logo h3 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    margin: 0;
}

.footer-logo p {
    font-size: 0.9rem;
    color: var(--gray-color);
    margin: 0;
}

.footer-description {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 20px;
    line-height: 1.6;
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-link:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}

.footer-title {
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: white;
}

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

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

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--secondary-color);
}

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

.contact-info li {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    margin-bottom: 15px;
    color: rgba(255, 255, 255, 0.7);
}

.contact-info i {
    color: var(--secondary-color);
    margin-top: 3px;
}

.subscribe-form {
    display: flex;
    gap: 10px;
}

.subscribe-form input {
    flex: 1;
    padding: 12px 15px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    color: white;
    outline: none;
}

.subscribe-form input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.subscribe-form button {
    white-space: nowrap;
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.copyright {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    gap: 20px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.5);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--secondary-color);
}

/* 响应式设计 */
@media (max-width: 992px) {
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .slide-title {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    .main-nav {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--dark-color);
        padding: 20px;
        transform: translateY(-100%);
        z-index: 1001;
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
    }
    
    .main-nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .main-nav ul {
        flex-direction: column;
        gap: 15px;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .mobile-menu-toggle.active i::before {
        content: '\f00d';
    }
    
    .hero-slider {
        height: 500px;
    }
    
    .slide-title {
        font-size: 2rem;
    }
    
    .slide-description {
        font-size: 1rem;
    }
    
    .services-grid,
    /* 新闻中心样式 */
.news-center-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
}

.news-grid {
        grid-template-columns: 1fr;
    }
    
    .news-section .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 20px;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .subscribe-form {
        flex-direction: column;
    }
}

@media (max-width: 576px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-slider {
        height: 400px;
    }
    
    .slide-title {
        font-size: 1.8rem;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.6s ease forwards;
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}

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

/* 工具提示 */
.tooltip {
    position: relative;
    display: inline-block;
}

.tooltip .tooltip-text {
    visibility: hidden;
    background-color: var(--dark-color);
    color: white;
    text-align: center;
    padding: 5px 10px;
    border-radius: var(--border-radius);
    position: absolute;
    z-index: 1;
    bottom: 125%;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0;
    transition: opacity 0.3s;
    font-size: 0.8rem;
    white-space: nowrap;
}

.tooltip:hover .tooltip-text {
    visibility: visible;
    opacity: 1;
}

/* 滚动条美化 */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--gray-light);
}

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

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}
/* 新闻中心页面样式 */
.news-center {
    padding: 60px 0;
    background: #f8f9fa;
}

.news-center-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
}

.news-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.news-item {
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

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

/* 响应式适配 */
@media (max-width: 992px) {
    .news-list {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .news-list {
        grid-template-columns: 1fr;
    }
    
    .news-center {
        padding: 40px 0;
    }
    
    .filter-categories {
        flex-wrap: wrap;
    }
    
    .filter-btn {
        padding: 8px 16px;
        font-size: 0.85rem;
    }
}