/* encoding: UTF-8 */
/* Hallmark · component: banner · genre: atmospheric · theme: quiet moonlit landscape
 * Decorative artwork with gently drifting clouds; no interactive states or visible text.
 * Pre-emit critique: P5 H5 E4 S5 R5 V4.
 */
.home-mid-autumn {
    --ma-sky-top: #0d182d;
    --ma-sky-middle: #1c2e4c;
    --ma-sky-horizon: #414b65;
    --ma-air: #95a4bd;
    --ma-moon-light: #f5f0dc;
    --ma-moon-shade: #cfcbb9;
    --ma-moon-sea: #8e9697;
    --ma-star: #c6d1de;
    --ma-ridge-light: #8a96ad;
    --ma-ridge-far: #425570;
    --ma-ridge-middle: #2e465f;
    --ma-ridge-near: #1a3046;
    --ma-foreground: #0c1d2c;
    --ma-water: #293f56;
    --ma-lamp: #c3a67a;
    /* 纯画面填满公共外框，圆角裁切及留白由公共组件管理。 */
    position: relative;
    height: 100%;
    background: linear-gradient(
        180deg,
        var(--ma-sky-top),
        var(--ma-sky-middle) 52%,
        var(--ma-sky-horizon)
    );
    pointer-events: none;
}

.home-mid-autumn__atmosphere {
    position: absolute;
    inset: 0;
    background: radial-gradient(
        ellipse at 68% 40%,
        color-mix(in srgb, var(--ma-moon-light) 9%, transparent),
        transparent 48%
    );
}

.home-mid-autumn__landscape {
    position: absolute;
    inset: 0;
    display: block;
    width: 100%;
    height: 100%;
}

/* 云形归一到 x=0；两端留足云宽及柔化余量，完全离屏后才复位，匀速单向循环。 */
.home-mid-autumn__cloud {
    animation: ma-cloud-drift 111s linear infinite;
}

.home-mid-autumn__cloud--left {
    transform: translateX(100px);
    animation-duration: 132s;
    animation-delay: -38s;
    opacity: 0.16;
}

.home-mid-autumn__cloud--high {
    transform: translateX(658px);
    animation-delay: -63s;
    opacity: 0.19;
}

.home-mid-autumn__cloud--right {
    transform: translateX(906px);
    animation-duration: 90s;
    animation-delay: -62s;
    opacity: 0.14;
}

/* 新云宽 360：左侧起点 -252、右侧起点 1332，均露出 108 单位（30%）。
 * 负延迟按 (-480 → 1520) 的进度计算，响应式时随周期一起变化，保持初始位置。 */
.home-mid-autumn__cloud--entering,
.home-mid-autumn__cloud--leaving {
    --ma-edge-cloud-duration: 120s;
    animation-duration: var(--ma-edge-cloud-duration);
}

.home-mid-autumn__cloud--entering {
    transform: translateX(-252px);
    animation-delay: calc(var(--ma-edge-cloud-duration) * -0.114);
    opacity: 0.17;
}

.home-mid-autumn__cloud--leaving {
    transform: translateX(1332px);
    animation-delay: calc(var(--ma-edge-cloud-duration) * -0.906);
    opacity: 0.15;
}

@keyframes ma-cloud-drift {
    from {
        transform: translateX(-480px);
    }
    to {
        transform: translateX(1520px);
    }
}

@media (prefers-reduced-motion: reduce) {
    .home-mid-autumn__cloud {
        animation: none;
    }
}

/* 高度占比 40%，中心位于 (68%, 40%)；独立方形画布保证任意比例下月亮始终圆满。 */
.home-mid-autumn__moon {
    position: absolute;
    left: 68%;
    top: 40%;
    height: 40%;
    aspect-ratio: 1;
    transform: translate(-50%, -50%);
}

.home-mid-autumn__moon::before {
    position: absolute;
    inset: -65%;
    border-radius: 50%;
    background: radial-gradient(
        circle,
        color-mix(in srgb, var(--ma-moon-light) 12%, transparent) 20%,
        color-mix(in srgb, var(--ma-moon-light) 4%, transparent) 43%,
        transparent 69%
    );
    content: '';
}

.home-mid-autumn__moon-disc {
    position: relative;
    display: block;
    width: 100%;
    height: 100%;
    overflow: visible;
}

.home-mid-autumn__pavilion {
    position: absolute;
    left: 31%;
    bottom: 9%;
    width: auto;
    height: 13%;
    overflow: visible;
}

.home-mid-autumn__pine {
    position: absolute;
    bottom: 0;
    left: 0;
    width: auto;
    height: 34%;
}

@media (max-width: 720px) {
    /* 窄屏缩短穿越周期，保持上一版可见速度；负延迟让五片云从不同位置开始。 */
    .home-mid-autumn__cloud--left {
        animation-duration: 79s;
        animation-delay: -23s;
    }

    .home-mid-autumn__cloud--high {
        animation-duration: 67s;
        animation-delay: -38s;
    }

    .home-mid-autumn__cloud--right {
        animation-duration: 54s;
        animation-delay: -37s;
    }

    .home-mid-autumn__cloud--entering,
    .home-mid-autumn__cloud--leaving {
        --ma-edge-cloud-duration: 72s;
    }

    .home-mid-autumn__pavilion {
        left: 25%;
        height: 10%;
    }

    .home-mid-autumn__pine {
        left: -12px;
        height: 28%;
    }
}