: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);
}

/* 基础动画：元素滚动渐入 */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}
/* 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AI视频 */
.ai-video-section {
    position: relative;
    height: 100vh;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

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

.ai-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;
}

.ai-video-content {
    text-align: center;
    
    padding: 0 20px;
    animation: fadeInUp 1s ease-out;
     display: flex;
    flex-direction: column;
    align-items: center;
}

.ai-video-content h2 {
    max-width: 800px;
    font-size: 3.5rem;
    margin-bottom: 20px;
    background: linear-gradient(90deg, var(--light), var(--primary));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.ai-video-content p {
    max-width: 800px;
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 30px;
}
.ai-video-content .btn {
    max-width: 190px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.btn {
    display: inline-block;
    background: var(--primary);
    color: var(--light);
    padding: 12px 30px;
    border-radius: 30px;
    text-decoration: none;
    transition: all 0.3s ease;
    font-weight: 500;
}

.btn:hover {
    background: var(--accent);
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 168, 255, 0.3);
}

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

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

@keyframes floatAI {
    0%, 100% {
        transform: translateY(0) translateX(0) rotate(0deg);
        opacity: 0.6;
    }
    50% {
        transform: translateY(-40px) translateX(20px) rotate(15deg);
        opacity: 0.9;
    }
}

/* 通用section标题样式 */
.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;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 平台能力/智能问答等模块：网格卡片 */
.platform-capability-section, .smart-qa-section, .smart-data-section, .doc-interpretation-section, .report-generation-section, .recognition-section, .service-mode-section, .delivery-process-section {
    background-color: var(--secondary);
    padding: 120px 0;
}

.capability-grid, .qa-grid, .data-grid, .doc-grid, .recognition-grid, .mode-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
}

.capability-card, .qa-card, .data-card, .doc-card, .recognition-card {
    background: var(--card-bg);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all 0.5s ease;
}

.capability-card:hover, .qa-card:hover, .data-card:hover, .doc-card:hover, .recognition-card:hover {
    transform: translateY(-10px);
    background: var(--card-hover);
}

.capability-img, .qa-img, .data-img, .doc-img, .recognition-img {
    height: 250px;
    overflow: hidden;
}

.capability-img img, .qa-img img, .data-img img, .doc-img img, .recognition-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.8s ease;
}

.capability-card:hover .capability-img img, 
.qa-card:hover .qa-img img, 
.data-card:hover .data-img img, 
.doc-card:hover .doc-img img, 
.recognition-card:hover .recognition-img img {
    transform: scale(1.05);
}

.capability-content, .qa-content, .data-content, .doc-content, .recognition-content {
    padding: 25px;
}

.capability-content h3, .qa-content h3, .data-content h3, .doc-content h3, .recognition-content h3 {
    font-size: 1.5rem;
    color: var(--light);
    margin-bottom: 15px;
}

.capability-content p, .qa-content p, .data-content p, .doc-content p, .recognition-content p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
}

/* AI能力交叠轮播 */
.ai-capabilities-carousel-section {
    background-color: var(--dark);
    padding: 120px 0;
}
.ai-capabilities-carousel-section .container{
    max-width: 2000px;
    width: 100%;
}
.ai-carousel {
    position: relative;
    height: 640px;
    perspective: 1000px;
    overflow: hidden;
}

.ai-carousel-slide {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%) scale(0.8);
    opacity: 0;
    transition: transform 0.5s ease, opacity 0.5s ease;
    width: 80%;
    z-index: 1;
}

.ai-carousel-slide.active {
    transform: translateX(-50%) scale(1);
    opacity: 1;
    z-index: 10;
}

.ai-carousel-slide.prev {
    transform: translateX(-120%) scale(0.8);
    opacity: 0.5;
    z-index: 5;
}

.ai-carousel-slide.next {
    transform: translateX(20%) scale(0.8);
    opacity: 0.5;
    z-index: 5;
}

.ai-slide-content {
    position: relative;
    height: 100%;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.ai-slide-content img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.8s ease;
}

.ai-slide-content:hover img {
    transform: scale(1.03);
}

.slide-text-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 30px;
    background: linear-gradient(to top, rgba(12, 20, 39, 0.9), rgba(12, 20, 39, 0));
    color: var(--light);
    transition: padding 0.3s ease;
}

.ai-slide-content:hover .slide-text-overlay {
    padding-bottom: 40px;
}

.slide-text-overlay h3 {
    font-size: 1.8rem;
    margin-bottom: 15px;
}

.slide-text-overlay p {
    font-size: 1rem;
    line-height: 1.6;
}

/* 轮播导航按钮 */
.ai-nav {
    display: flex;
    justify-content: center;
    gap: 20px;
}
.carousel-btn{
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--primary);
    border: none;
    display: flex;
    justify-content: center;
    align-items: center;
}
.carousel-btn:hover{
    background-color: var(--accent);
}
/* 交付流程：浮动动画 */
.delivery-process-section {
    background-color: var(--secondary);
    padding: 120px 0;
}

.process-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.process-img, .process-content {
    animation: floatUpDown 3s infinite ease-in-out;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.process-img {
    overflow: hidden;
    transition: transform 0.5s ease;
    animation-delay: 0.5s; /* 图片延迟浮动，增强层次感 */
}

.process-img:hover, .process-content:hover {
    transform: scale(1.02);
    animation-play-state: paused; /*  hover时暂停动画 */
}

.process-img img {
    width: 100%;
    height: auto;
    display: block;
}

.process-content {
    background: var(--card-bg);
    padding: 30px;
}

.process-steps li {
    margin-bottom: 25px;
    padding-bottom: 25px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.process-steps li:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.process-steps h3 {
    font-size: 1.3rem;
    color: var(--primary);
    margin-bottom: 10px;
}

.process-steps p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
}

@keyframes floatUpDown {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-15px);
    }
}

/* 服务模式：3D翻转卡片 */
.mode-card {
    perspective: 1000px;
}

.flip-card-inner {
    position: relative;
    width: 100%;
    height: 400px;
    text-align: center;
    transition: transform 0.6s;
    transform-style: preserve-3d;
    box-shadow: var(--shadow);
    border-radius: 12px;
}

.mode-card:hover .flip-card-inner {
    transform: rotateY(180deg);
}

.flip-card-front, .flip-card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    border-radius: 12px;
    overflow: hidden;
}

.flip-card-front {
    background-color: var(--card-bg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.flip-card-back {
    background-color: var(--card-hover);
    color: var(--light);
    transform: rotateY(180deg);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 25px;
}

.mode-img {
    height: 200px;
    width: 100%;
    overflow: hidden;
}

.mode-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.8s ease;
}

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

.mode-content {
    padding: 20px;
}

.mode-content h3 {
    font-size: 1.3rem;
    color: var(--light);
    margin: 0;
}

.flip-card-back ul {
    list-style: none;
    padding: 0;
    text-align: left;
}

.flip-card-back li {
    margin-bottom: 10px;
    position: relative;
    padding-left: 20px;
}

.flip-card-back li::before {
    content: "•";
    color: var(--primary);
    position: absolute;
    left: 0;
    font-size: 1.2rem;
}

/* 交付流程：卡片浮动动画 */
.delivery-process-section {
    background-color: var(--dark);
    padding: 120px 0;
}

.process-cards {
    display: flex;
    flex-direction: column;
    gap: 30px; /* 卡片间距 */
}

.process-card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 30px;
    box-shadow: var(--shadow);
    animation: floatUpDown 3s infinite ease-in-out; /* 上下浮动动画 */
    transition: transform 0.3s ease, box-shadow 0.3s ease; /* hover 过渡 */
}

.process-card:hover {
    transform: translateY(-5px) scale(1.01); /* hover 上浮+轻微放大 */
    box-shadow: 0 15px 35px rgba(0, 168, 255, 0.2); /* hover 增强阴影 */
    animation-play-state: paused; /* hover 时暂停浮动动画 */
}

.process-card h3 {
    font-size: 1.3rem;
    color: var(--primary);
    margin-bottom: 10px;
}

.process-card p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
}

/* 上下浮动关键帧 */
@keyframes floatUpDown {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-15px);
    }
}

/* 响应式：移动端适配 */
@media (max-width: 992px) {

    .ai-video-content h2 {
        font-size: 2.5rem;
    }

    .section-title h2 {
        font-size: 2rem;
    }

    .process-grid {
        grid-template-columns: 1fr;
    }
    .ai-nav{
        margin: 0;
    }
    .ai-carousel {
    height: 400px;

}
}

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

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

    .capability-grid, .qa-grid, .data-grid, .doc-grid, .recognition-grid, .mode-grid {
        grid-template-columns: 1fr;
    }
    .ai-carousel {
    height: 300px;

}
}
@media (max-width: 576px) {
    .ai-carousel {
    height: 200px;

}
}