/* 全局字体样式 */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

/* 网站背景图像 - 位于词云下层 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('resource/background.webp');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    z-index: -1;
}

/* 词云容器样式 - 作为全屏背景层 */
.word-cloud-container {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    z-index: 0;
}

/* 词云滚动层 */
.word-cloud-scroll {
    position: absolute;
    width: 200%;
    height: 200%;
    animation: cloudScroll 80s linear infinite;
}

/* 斜向循环滚动动画 */
@keyframes cloudScroll {
    0% {
        transform: translate(0, 0) rotate(-5deg);
    }
    100% {
        transform: translate(-50%, -50%) rotate(-5deg);
    }
}

/* 词云文字父容器 - 负责定位 */
.word-cloud-item {
    position: absolute;
    white-space: nowrap;
    transform: translate(-50%, -50%);
}

/* 词云文字子元素 - 负责视觉效果 */
.word-cloud-text {
    font-weight: 500;
    cursor: default;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.word-cloud-text:hover {
    transform: scale(1.2);
    opacity: 1 !important;
    z-index: 100;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

/* 内容卡片层 - 确保在词云上方 */
.content-card {
    position: relative;
    z-index: 10;
}