/* =============================================
   MOVING IMAGE 列表页样式
   自适应：>1920 大屏居中 / 1440-1920 默认 /
           1024-1439 小平板 / 769-1024 平板 / <769 手机
   ============================================= */

/* ===== 顶部灰色背景覆盖层 ===== */
.top-grey-bg {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: clamp(150px, 21.806vw, 314px);
    background-color: #D4D4D4;
    z-index: 80;
}

.navbar {
    background-color: transparent !important;
}

/* ===== 二级菜单 ===== */
.submenu-container {
    position: fixed;
    top: clamp(90px, 17.639vw, 254px);
    left: clamp(12px, 1.389vw, 20px);
    z-index: 90;
    background-color: transparent;
}
.submenu-container .container-fluid {
    padding-left: 0 !important;
}
.submenu {
    display: flex;
    list-style: none;
    justify-content: flex-start;
    gap: clamp(24px, 12.5vw, 180px);
    padding-left: 0 !important;
    margin-bottom: 0;
}
.submenu-item {
    font-family: 'Inter', sans-serif;
    font-size: clamp(14px, 1.667vw, 24px);
    line-height: 150%;
    font-weight: 800;
    letter-spacing: 0.04em;
    color: #000;
    transition: color 0.3s ease;
    position: relative;
}
.submenu-item.active,
.submenu-item:hover {
    color: #0066ff;
}
.submenu-item:focus,
.submenu-item:focus-visible,
.submenu-item:hover:focus,
.submenu-item:hover:focus-visible {
    color: #0066ff !important;
    outline: none;
}

/* ===== 主内容区 ===== */
.moving-image-main {
    margin-top: clamp(150px, 19.444vw, 280px);
    min-height: calc(100vh - clamp(150px, 19.444vw, 280px) - 35px);
}

.content-section {
    display: none;
}
.content-section.active {
    display: block;
}

/* ===== 项目列表（单列垂直排列） ===== */
.project-list {
    padding: 0;
    margin-top: 0;
    perspective: 1000px;
}
.project-link {
    display: block;
    text-decoration: none;
    color: inherit;
}
.project-item {
    margin-bottom: clamp(30px, 4.861vw, 70px);
    margin-left: clamp(16px, 2.083vw, 30px);
    margin-right: clamp(16px, 2.083vw, 30px);
    position: relative;
    background-color: #d4d4d4;
    transform-style: preserve-3d;
    will-change: transform;
    overflow: hidden;
}
.project-list .project-link:last-child .project-item {
    margin-bottom: clamp(40px, 7.639vw, 110px);
}

/* ===== 视频/图片容器 ===== */
.project-video-container {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    overflow: hidden;
}
.project-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.project-cover {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    transition: opacity 0.3s ease;
    will-change: transform;
}
.project-cover-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.project-image-container {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    overflow: hidden;
}
.project-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.project-video-container:hover .project-cover,
.project-video-container.play .project-cover {
    opacity: 0;
}

/* ===== 项目信息（标题 + 年份） ===== */
.moving-image-main .project-info {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    position: relative;
    width: 100%;
    line-height: 0;
}
.moving-image-main .project-info .project-year {
    font-family: 'Inter', sans-serif;
    font-style: normal;
    font-weight: 400;
    font-size: clamp(24px, 4.444vw, 64px);
    line-height: 123%;
    text-align: right;
    letter-spacing: -0.32em;
    color: #000000;
    padding-right: clamp(8px, 1.181vw, 17px);
}
.moving-image-main .project-info .project-title {
    font-family: 'FZChaoCuHei-M10S', serif;
    font-style: normal;
    font-weight: 400;
    font-size: clamp(16px, 2.5vw, 36px);
    line-height: 123%;
    letter-spacing: 0.027em;
    color: #000000;
    padding-top: clamp(8px, 1.111vw, 16px);
}

/* ===== 播放按钮 ===== */
.play-btn {
    width: clamp(30px, 3.333vw, 48px);
    height: clamp(30px, 3.333vw, 48px);
}
.play-btn::after {
    border-top: clamp(5px, 0.556vw, 8px) solid transparent;
    border-bottom: clamp(5px, 0.556vw, 8px) solid transparent;
    border-left: clamp(8px, 0.972vw, 14px) solid #fff;
}