: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);
            --transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1); /* 统一过渡曲线 */
}

/* 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;
}

@keyframes droneFloat {

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

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

/* 模块一：全屏图片 */
.drone-hero-section {
    position: relative;
    height: 100vh;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

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

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

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

/* 模块二：方案优势特点 */
.drone-advantages-section {
    background-color: var(--secondary);
    padding: 120px 0;
}

.drone-advantages-section .container {
    max-width: 2000px;
    width: 100%;
}

.advantages-container {
    max-width: 2000px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

 .advantage-card {
            border-radius: 12px;
            padding: 30px;
            text-align: center;
            transition: var(--transition);
            opacity: 0; /* 初始透明 */
            transform: translateY(30px); /* 初始向下偏移 */
        }

        /* 滚动激活：显示状态 */
        .advantage-card.active {
            opacity: 1;
            transform: translateY(0);
        }

        .advantage-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0, 168, 255, 0.2);
            background: var(--card-hover);
        }

        .advantage-icon {
            width: 100%;
            height: 150px;
            margin: 0 auto 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: transform 0.5s ease;
        }

        .advantage-icon img {
            height: 100%;
            width: auto;
        }

        .advantage-card:hover .advantage-icon {
            transform: scale(1.1);
        }

        .advantage-title {
            font-size: 1.5rem;
            color: var(--light);
            margin-bottom: 15px;
        }

        .advantage-desc {
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.6;
        }


/* 模块三：系统组成 */
.drone-system-section {
    background-color: var(--dark);
    padding: 80px 0;
}

 .drone-system-section .container {
            max-width: 1800px;
            width: 100%;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 系统图片：初始隐藏状态 + 过渡 */
        .system-container {
            max-width: 100%;
            margin: 0 auto;
            opacity: 0; /* 初始透明 */
            transform: translateY(30px); /* 初始向下偏移 */
            transition: var(--transition);
        }

        /* 滚动激活：显示状态 */
        .system-container.active {
            opacity: 1;
            transform: translateY(0);
        }

        .system-media {
            width: 100%;
        }

        .system-media img {
            width: 100%;
            height: auto;
            min-height: 400px;
            object-fit: cover;
            border-radius: 0;
            box-shadow: var(--shadow);
            transition: transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .system-media:hover img {
            transform: scale(1.02);
        }

/* 模块四：应急场景 */
.drone-scenarios-section {
    background-color: var(--secondary);
    padding: 120px 0;
}

.scenarios-container {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }

        /* 场景卡片：初始隐藏状态 + 过渡 */
        .scenario-card {
            border-radius: 12px;
            overflow: hidden;
            background: var(--card-bg);
            transition: var(--transition);
            position: relative;
            opacity: 0; /* 初始透明 */
            transform: translateY(30px); /* 初始向下偏移 */
        }

        /* 滚动激活：显示状态 */
        .scenario-card.active {
            opacity: 1;
            transform: translateY(0);
        }

        .scenario-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0, 168, 255, 0.2);
        }

        .scenario-img {
            width: 100%;
            height: 220px;
            overflow: hidden;
        }

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

        .scenario-card:hover .scenario-img img {
            transform: scale(1.1);
        }

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

        .scenario-card:hover .scenario-overlay {
            opacity: 1;
            transform: translateY(0);
        }

        .scenario-title {
            font-size: 1.5rem;
            color: var(--light);
            margin-bottom: 10px;
        }

  /* 模块五：方案应用 */
        .drone-application-section {
            background-color: var(--dark);
            padding: 120px 0;
        }

        .application-container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 20px;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(1000px, 1fr));
            gap: 60px;
            align-items: center;
        }

        @media (max-width: 992px) {
            .application-container {
                grid-template-columns: 1fr;
                gap: 40px;
            }
        }

        .application-card {
            display: flex;
            align-items: center;
            gap: 40px;
            opacity: 0;
            transform: translateY(30px);
            transition: var(--transition);
        }

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

        .application-media {
            flex: 1;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: var(--shadow);
        }

        .application-media img {
            width: 100%;
            height: auto;
            object-fit: cover;
            transition: transform 0.6s ease;
        }

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

        .application-content {
            flex: 1;
        }

        .application-title {
            font-size: 1.8rem;
            color: var(--light);
            margin-bottom: 15px;
        }

        .application-desc {
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.6;
            font-size: 1.1rem;
        }

        @media (max-width: 768px) {
            .application-card {
                flex-direction: column;
                text-align: center;
            }

            .application-content {
                order: 2;
            }

            .application-title {
                font-size: 1.5rem;
            }
        }


/* 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) {
    .drone-hero-content h2 {
        font-size: 2.5rem;
    }

    .advantages-container,
    .scenarios-container {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }

    /* 模块三响应式：减小最小高度，适配移动端 */
    .system-media img {
        min-height: 300px;
    }
}

@media (max-width: 768px) {
    .drone-hero-content h2 {
        font-size: 2rem;
    }

    .drone-hero-content p {
        font-size: 1rem;
    }

    .advantage-card,
    .scenario-card {
        padding: 20px;
    }

    .advantage-icon {
        width: 60px;
        height: 60px;
        font-size: 2rem;
    }

    .advantage-title,
    .scenario-title {
        font-size: 1.3rem;
    }

    /* 模块三移动端：进一步减小高度 */
    .system-media img {
        min-height: 250px;
    }}