/* 无人机内页专属样式 */
 :root {
     --primary: #00a8ff;
     --secondary: #192a56;
     --dark: #0c1427;
     --light: #f5f6fa;
     --accent: #9c88ff;
     --card-bg: rgba(255, 255, 255, 0.03);
     --card-hover: rgba(255, 255, 255, 0.07);
     --shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
 }
/* 滚动条样式优化 */
        ::-webkit-scrollbar {
            width: 8px;
            height: 8px;
        }

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

        ::-webkit-scrollbar-thumb {
            background: var(--primary);
            border-radius: 4px;
            transition: background 0.3s ease;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: var(--accent);
        }

 /* 鼠标跟随无人机样式 */
 .drone-follower {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    color: var(--primary) !important;
    pointer-events: none !important;
    z-index: 9999 !important;
    opacity: 0.9 !important;
    transition: transform 0.15s ease-out !important;
    transform-origin: center center !important;
    /* animation: droneFloat 3s infinite ease-in-out !important; */
    /* 移除固定 width/height，改为 JS 动态设置 */
}

 /* 无人机自身悬浮动画 */
 @keyframes droneFloat {

     0%,
     100% {
         transform: translateY(0) rotate(15deg) !important;
     }

     50% {
         transform: translateY(-8px) rotate(15deg) !important;
     }
 }

 /* 模块一：全屏无人机飞行视频 */
 .drone-video-section {
     position: relative;
     height: 100vh;
     overflow: hidden;
     display: flex;
     align-items: center;
     justify-content: center;
 }

 .drone-video-bg {
     position: absolute;
     top: 0;
     left: 0;
     width: 100%;
     height: 100%;
     z-index: -1;
 }

 .drone-video-bg video {
     width: 100%;
     height: 100%;
     object-fit: cover;
     /* filter: brightness(0.5); */
 }

 .drone-video-overlay {
     position: absolute;
     top: 0;
     left: 0;
     width: 100%;
     height: 100%;
     background: linear-gradient(135deg, rgba(12, 20, 39, 0.8) 0%, rgba(25, 42, 86, 0.8) 100%);
     z-index: -1;
 }

 .drone-video-content {
     text-align: center;
     max-width: 800px;
     padding: 0 20px;
     animation: fadeInUp 1s ease-out;
 }

 .drone-video-content h2 {
     font-size: 3.5rem;
     margin-bottom: 20px;
     background: linear-gradient(90deg, var(--light), var(--primary));
     -webkit-background-clip: text;
     background-clip: text;
     color: transparent;
 }

 .drone-video-content p {
     font-size: 1.2rem;
     color: rgba(255, 255, 255, 0.9);
     margin-bottom: 30px;
 }

 .drone-video-particles {
     position: absolute;
     top: 0;
     left: 0;
     width: 100%;
     height: 100%;
     z-index: -1;
     overflow: hidden;
 }

 .drone-particle {
     position: absolute;
     background: rgba(0, 168, 255, 0.2);
     border-radius: 50%;
     animation: floatDrone 10s infinite ease-in-out;
 }

 @keyframes floatDrone {

     0%,
     100% {
         transform: translateY(0) translateX(0) rotate(0deg);
         opacity: 0.6;
     }

     50% {
         transform: translateY(-40px) translateX(20px) rotate(15deg);
         opacity: 0.9;
     }
 }

 /* 模块二：涉及领域 */
 .drone-fields-section {
     background-color: var(--secondary);
     padding: 120px 0;
     overflow: hidden;
     width: 100%;
 }
 .drone-fields-section .container{
    max-width: 1800px;
    width: 100%;
    overflow: hidden;
 }
 .section-title {
     text-align: center;
     margin-bottom: 80px;
     color: var(--light);
 }

 .section-title h2 {
     font-size: 2.5rem;
     margin-bottom: 15px;
 }

 .section-title p {
     font-size: 1.1rem;
     color: rgba(255, 255, 255, 0.7);
     max-width: 600px;
     margin: 0 auto;
 }

 /* 领域容器居中 */
 .fields-container {
     display: flex;
     align-items: center;
     justify-content: center;
     /* 水平居中 */
     min-height: 400px;
     width: 100%;
     max-width: 1800px !important;
     margin: 0 auto;
     padding: 0 20px;
     gap: 0.5rem;
     /* overflow-x: auto; */
     /* 超出可滚动 */
     scrollbar-width: none;
     /* 隐藏滚动条 */
 }

 .fields-container::-webkit-scrollbar {
     display: none;
 }

 .field-card {
     flex: 0 0 auto;
     width: 100px;
     /* 初始宽度缩小 */
     height: 600px;
     border-radius: 10px;
     overflow: hidden;
     position: relative;
     cursor: pointer;
     box-shadow: var(--shadow);
     transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
 }

 .field-card.active {
    flex: 0 0 auto;
    width: 68%; /* 激活卡片固定占比，可根据需求调整 */
    z-index: 20;
    height: 600px;
}

 .field-card:not(.active) {
    flex: 0 0 auto; /* 保持不伸缩 */
    height: 600px; /* 与激活卡片高度一致 */
    filter: brightness(0.7);
    width: 3%;
    /* 宽度由JS动态计算，这里不设固定值 */
}

 .field-card img {
     width: 100%;
     height: 100%;
     object-fit: cover;
     transition: transform 1.2s cubic-bezier(0.4, 0, 0.2, 1);
 }

 .field-card.active img {
     transform: scale(1.1);
 }

 .field-overlay {
     position: absolute;
     bottom: 0;
     left: 0;
     width: 100%;
     padding: 15px;
     background: linear-gradient(0deg, rgba(12, 20, 39, 0.9) 0%, transparent 100%);
     transition: all 0.5s ease;
 }

 .field-card.active .field-overlay {
     padding: 25px;
     background: linear-gradient(0deg, rgba(12, 20, 39, 0.95) 0%, transparent 100%);
 }

 .field-title {
     font-size: 1.2rem;
     color: var(--light);
     transform: translateY(20px);
     opacity: 0;
     transition: all 0.3s ease 0.2s;
     white-space: nowrap;
 }

 .field-card.active .field-title {
     transform: translateY(0);
     opacity: 1;
 }

 .field-desc {
     position: absolute;
     bottom: 60px;
     left: 0;
     width: 100%;
     padding: 0 25px;
     color: rgba(255, 255, 255, 0.8);
     font-size: 0.9rem;
     transform: translateY(20px);
     opacity: 0;
     transition: all 0.4s ease 0.3s;
 }

 .field-card.active .field-desc {
     transform: translateY(0);
     opacity: 1;
 }

 /* 模块三：低空经济解决方案（全新动态展示形式） */
 .drone-solution-section {
     background-color: var(--dark);
     padding: 120px 0;
     position: relative;
     overflow: hidden;
 }
 /* 背景装饰点 */
 .solution-bg-dots {
     position: absolute;
     top: 0;
     left: 0;
     width: 100%;
     height: 100%;
     z-index: 0;
     opacity: 0.1;
 }

 .solution-dot {
     position: absolute;
     width: 3px;
     height: 3px;
     background: var(--primary);
     border-radius: 50%;
 }

 /* 解决方案项（左右交替布局） */
 .solution-list {
     position: relative;
     z-index: 1;
     max-width: 1400px;
     margin: 0 auto;
     padding: 0 20px;
 }

 .solution-item {
     display: grid;
     grid-template-columns: 1fr 1fr;
     gap: 40px;
     align-items: center;
     margin-bottom: 120px;
     opacity: 0;
     transform: translateY(50px);
     transition: all 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
 }

 /* 偶数项反向布局 */
 .solution-item:nth-child(even) {
     grid-template-columns: 1fr 1fr;
     flex-direction: row-reverse;
 }

 .solution-item.visible {
     opacity: 1;
     transform: translateY(0);
 }

 .solution-media {
     position: relative;
     border-radius: 12px;
     overflow: hidden;
     box-shadow: var(--shadow);
     height: 350px;
 }

 .solution-media::before {
     content: '';
     position: absolute;
     top: 0;
     left: 0;
     width: 100%;
     height: 100%;
     background: linear-gradient(45deg, rgba(0, 168, 255, 0.2), transparent);
     z-index: 1;
     opacity: 0;
     transition: opacity 0.5s ease;
 }

 .solution-item:hover .solution-media::before {
     opacity: 1;
 }

 .solution-media img {
     width: 100%;
     height: 100%;
     object-fit: cover;
     transition: transform 1s cubic-bezier(0.4, 0, 0.2, 1);
 }

 .solution-item:hover .solution-media img {
     transform: scale(1.05);
 }

 /* 图标装饰 */
 .solution-icon-decor {
     position: absolute;
     top: -20px;
     right: -20px;
     width: 80px;
     height: 80px;
     border-radius: 50%;
     background: rgba(0, 168, 255, 0.15);
     display: flex;
     align-items: center;
     justify-content: center;
     font-size: 2rem;
     color: var(--primary);
     z-index: 2;
     box-shadow: 0 0 20px rgba(0, 168, 255, 0.3);
     animation: pulse 2s infinite ease-in-out;
 }

 @keyframes pulse {

     0%,
     100% {
         transform: scale(1);
         opacity: 0.8;
     }

     50% {
         transform: scale(1.1);
         opacity: 1;
     }
 }

 .solution-content {
     padding: 20px 0;
 }

 .solution-subtitle {
     font-size: 1rem;
     color: var(--primary);
     text-transform: uppercase;
     letter-spacing: 2px;
     margin-bottom: 10px;
 }

 .solution-title {
     font-size: 2rem;
     color: var(--light);
     margin-bottom: 20px;
     position: relative;
     padding-bottom: 15px;
 }

 .solution-title::after {
     content: '';
     position: absolute;
     bottom: 0;
     left: 0;
     width: 60px;
     height: 3px;
     background: linear-gradient(90deg, var(--primary), var(--accent));
     border-radius: 3px;
 }

 .solution-desc {
     color: rgba(255, 255, 255, 0.7);
     font-size: 1.1rem;
     line-height: 1.8;
     margin-bottom: 30px;
 }

 /* 特性列表 */
 .solution-features {
     display: grid;
     grid-template-columns: repeat(2, 1fr);
     gap: 15px;
     margin-bottom: 30px;
 }

 .solution-feature {
     display: flex;
     align-items: center;
     gap: 10px;
     color: rgba(255, 255, 255, 0.8);
 }

 .solution-feature i {
     color: var(--primary);
     font-size: 1.2rem;
 }

 /* 子方案折叠面板 */
 .solution-collapse {
     margin-top: 40px;
     border-top: 1px solid rgba(255, 255, 255, 0.1);
     padding-top: 30px;
 }

 .collapse-header {
     display: flex;
     align-items: center;
     justify-content: space-between;
     cursor: pointer;
     padding: 15px 0;
     border-bottom: 1px solid rgba(255, 255, 255, 0.1);
 }

 .collapse-header h4 {
     font-size: 1.3rem;
     color: var(--light);
     transition: color 0.3s ease;
 }

 .collapse-header:hover h4 {
     color: var(--primary);
 }

 .collapse-icon {
     color: var(--primary);
     font-size: 1.5rem;
     transition: transform 0.3s ease;
 }

 .collapse-header.active .collapse-icon {
     transform: rotate(180deg);
 }

 .collapse-content {
     max-height: 0;
     overflow: hidden;
     transition: max-height 0.5s ease;
     padding: 0 10px;
 }

 .collapse-content.active {
     max-height: 500px;
     padding: 20px 10px;
 }

 .collapse-desc {
     color: rgba(255, 255, 255, 0.7);
     line-height: 1.8;
     margin-bottom: 15px;
 }

 /* 模块四：案例展示（优化响应式） */
.drone-cases-section {
    background-color: var(--secondary);
    padding: 120px 0;
}

/* 案例网格布局：核心响应式优化 */
.cases-grid {
    display: grid;
    /* 最小宽度从400px降至280px，适配手机屏幕；保持自动填充特性 */
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px; /* 基础间距 */
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px; /* 左右内边距，避免边缘紧贴屏幕 */
}

/* 案例卡片基础样式 */
/* 平台算法模块 - 新卡片样式 */
.case-card {
    border-radius: 12px;
    overflow: hidden;
    background: linear-gradient(145deg, rgba(25, 42, 86, 0.8), rgba(12, 20, 39, 0.8));
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    /* 修复：默认设置可见，滚动动画作为增强效果 */
    opacity: 1 !important;
    transform: translateY(0) !important;
    box-shadow: 0 8px 24px rgba(0, 168, 255, 0.1);
}

/* 保留滚动动画的增强效果（可选） */
.case-card.visible {
    transform: translateY(-8px);
    box-shadow: 0 12px 28px rgba(0, 168, 255, 0.2);
}

/* 卡片悬浮效果强化 */
.case-card:hover {
    transform: translateY(-12px);
    box-shadow: 0 16px 32px rgba(0, 168, 255, 0.25);
    background: linear-gradient(145deg, rgba(25, 42, 86, 1), rgba(12, 20, 39, 1));
}

/* 图片容器优化 */
.case-img {
    width: 100%;
    height: 200px;
    overflow: hidden;
    position: relative;
}

/* 图片叠加渐变，提升文字可读性 */
.case-img::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 40%;
    background: linear-gradient(0deg, rgba(12, 20, 39, 0.9), transparent);
    z-index: 1;
}

.case-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    filter: brightness(0.9);
}

.case-card:hover .case-img img {
    transform: scale(1.08);
    filter: brightness(1.1);
}

/* 内容区域居中布局 */
.case-content {
    padding: 25px 15px;
    text-align: center;
    position: relative;
    z-index: 2;
}

/* 平台名称样式突出 */
.case-title {
    font-size: 1.4rem;
    color: var(--light);
    margin: 0;
    transition: all 0.3s ease;
    position: relative;
    display: inline-block;
    padding-bottom: 8px;
}

/* 标题底部装饰线 */
.case-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 2px;
    background: var(--primary);
    border-radius: 1px;
    transition: width 0.3s ease;
}

.case-card:hover .case-title {
    color: var(--primary);
}

.case-card:hover .case-title::after {
    width: 60px;
}

/* 跳转提示图标 */
.case-link::after {
    content: '';
    position: absolute;
    bottom: 15px;
    right: 15px;
    width: 30px; 
    height: 30px;
    background-image: url('../images/jiantou.png');
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    opacity: 0.5;
    transition: all 0.3s ease;
    z-index: 3;
}

.case-card:hover .case-link::after {
    opacity: 1;
    transform: translateX(5px);
}

/* 响应式适配 */
@media (max-width: 768px) {
    .case-img {
        height: 160px;
    }
    .case-title {
        font-size: 1.2rem;
    }
}

@media (max-width: 576px) {
    .case-img {
        height: 140px;
    }
    .case-content {
        padding: 20px 10px;
    }
    .case-title {
        font-size: 1.1rem;
    }
}

 /* 动画关键帧 */
 @keyframes fadeInUp {
     from {
         opacity: 0;
         transform: translateY(30px);
     }

     to {
         opacity: 1;
         transform: translateY(0);
     }
 }

 /* 响应式调整 */
 @media (max-width: 992px) {

     /* 模块二 */
     .field-card {
         height: 280px;
     }

     .field-card.active {
         width: 260px;
     }

     /* 模块三 */
     .solution-item {
         grid-template-columns: 1fr;
         margin-bottom: 80px;
     }

     .solution-item:nth-child(even) {
         grid-template-columns: 1fr;
     }

     .solution-media {
         height: 300px;
     }

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

 @media (max-width: 768px) {

     /* 模块二 */
     .field-card {
         height: 250px;
     }

     .field-card.active {
         width: 220px;
     }

     /* 模块三 */
     .solution-media {
         height: 250px;
     }

     .solution-title {
         font-size: 1.8rem;
     }
 }
 @media (max-width: 576px) {
    .cases-grid {
        gap: 15px; /* 进一步缩小间距 */
        padding: 0 15px;
    }

    .case-img {
        height: 180px; /* 继续降低图片高度 */
    }

    .case-content {
        padding: 18px;
    }

    .case-title {
        font-size: 1.2rem;
        margin-bottom: 12px;
    }

    .case-tag {
        padding: 4px 12px;
        font-size: 0.85rem; /* 缩小标签字体 */
    }
}