.feature-comparison {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden;
    isolation: isolate;
    background: var(--secondary, #202020);
    pointer-events: none;
    user-select: none;
}
.feature-comparison__status {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    color: var(--muted-foreground, #aaa);
    font-size: 0.75rem;
}
.feature-comparison__layer {
    position: absolute;
    inset: 0;
    visibility: hidden;
}
.feature-comparison__layer img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
    background: var(--secondary, #202020);
}
.feature-comparison__after {
    z-index: 1;
    clip-path: inset(0 50% 0 0);
}
.feature-comparison__divider {
    position: absolute;
    inset: 0 auto 0 50%;
    width: 2px;
    z-index: 3;
    transform: translateX(-50%);
    visibility: hidden;
    background: #fff;
    box-shadow: 0 0 5px rgb(0 0 0 / 35%);
}
.feature-comparison.is-ready .feature-comparison__status { display: none; }
.feature-comparison.is-ready .feature-comparison__layer,
.feature-comparison.is-ready .feature-comparison__divider { visibility: visible; }
.feature-comparison.is-ready .feature-comparison__after {
    animation: feature-comparison-reveal var(--comparison-cycle, 3000ms) ease-in-out infinite;
    animation-play-state: paused;
}
.feature-comparison.is-ready .feature-comparison__divider {
    animation: feature-comparison-divider var(--comparison-cycle, 3000ms) ease-in-out infinite;
    animation-play-state: paused;
}
.feature-comparison.is-playing .feature-comparison__after,
.feature-comparison.is-playing .feature-comparison__divider { animation-play-state: running; }
/* 向右揭示风格图，向左恢复原图；完整往返后由组件切换室内／室外。 */
@keyframes feature-comparison-reveal {
    0%, 8%, 100% { clip-path: inset(0 100% 0 0); }
    46%, 58% { clip-path: inset(0 0 0 0); }
}
@keyframes feature-comparison-divider {
    0%, 8%, 100% { left: 0%; }
    46%, 58% { left: 100%; }
}
/* 3800ms 一轮：1000ms 初始图，450ms 滑入，150ms 覆盖，1200ms 淡出，1000ms 结果。 */
.feature-comparison--transfer .feature-comparison__divider { display: none; }
.feature-comparison--transfer .feature-comparison__result { z-index: 1; opacity: 0; }
.feature-comparison--transfer .feature-comparison__after {
    z-index: 2;
    clip-path: none;
    transform: translateX(100%);
    background: var(--secondary, #202020);
}
.feature-comparison--transfer .feature-comparison__after img { object-fit: cover; }
.feature-comparison--transfer.is-ready .feature-comparison__after {
    animation: feature-transfer-reference var(--comparison-cycle, 3800ms) cubic-bezier(.22, .61, .36, 1) infinite;
    animation-play-state: paused;
}
.feature-comparison--transfer.is-ready .feature-comparison__result {
    animation: feature-transfer-result var(--comparison-cycle, 3800ms) steps(1, end) infinite;
    animation-play-state: paused;
}
.feature-comparison--transfer.is-playing .feature-comparison__after,
.feature-comparison--transfer.is-playing .feature-comparison__result { animation-play-state: running; }
@keyframes feature-transfer-reference {
    0%, 26.3158% { transform: translateX(100%); opacity: 1; }
    38.1579%, 42.1053% { transform: translateX(0); opacity: 1; }
    73.6842%, 100% { transform: translateX(0); opacity: 0; }
}
/* 1500ms 时参考图已完全覆盖，底图切成结果；无需定时器更换 src。 */
@keyframes feature-transfer-result {
    0% { opacity: 0; }
    39.4737%, 100% { opacity: 1; }
}
/* 6300ms：素材完整展示后淡出，合成图停留，再从左到右扫描揭示最终结果。 */
.feature-comparison--composer .feature-comparison__layer img { object-fit: cover; }
.feature-comparison--composer .feature-comparison__after,
.feature-comparison--composer .feature-comparison__after img { background: transparent; }
.feature-comparison--composer .feature-comparison__final {
    z-index: 3;
    clip-path: inset(0 100% 0 0);
}
.feature-comparison--composer .feature-comparison__divider {
    display: block;
    z-index: 4;
    left: 0;
    opacity: 0;
}
.feature-comparison--composer.is-ready .feature-comparison__after {
    animation: feature-composer-material var(--comparison-cycle, 6300ms) cubic-bezier(.22, .61, .36, 1) infinite;
    animation-play-state: paused;
}
.feature-comparison--composer.is-ready .feature-comparison__result {
    animation: feature-composer-composite var(--comparison-cycle, 6300ms) linear infinite;
    animation-play-state: paused;
}
.feature-comparison--composer.is-ready .feature-comparison__final {
    animation: feature-composer-final var(--comparison-cycle, 6300ms) cubic-bezier(.22, .61, .36, 1) infinite;
    animation-play-state: paused;
}
.feature-comparison--composer.is-ready .feature-comparison__divider {
    animation: feature-composer-divider var(--comparison-cycle, 6300ms) cubic-bezier(.22, .61, .36, 1) infinite;
    animation-play-state: paused;
}
.feature-comparison--composer.is-playing .feature-comparison__after,
.feature-comparison--composer.is-playing .feature-comparison__result,
.feature-comparison--composer.is-playing .feature-comparison__final,
.feature-comparison--composer.is-playing .feature-comparison__divider {
    animation-play-state: running;
}
@keyframes feature-composer-material {
    0%, 15.8730% { transform: translateX(100%); opacity: 1; }
    23.0159%, 34.9206% { transform: translateX(0); opacity: 1; animation-timing-function: linear; }
    53.9683%, 100% { transform: translateX(0); opacity: 0; }
}
@keyframes feature-composer-composite {
    0%, 34.9206% { opacity: 0; }
    53.9683%, 100% { opacity: 1; }
}
@keyframes feature-composer-final {
    0%, 69.8413% { clip-path: inset(0 100% 0 0); }
    78.5714%, 100% { clip-path: inset(0 0 0 0); }
}
@keyframes feature-composer-divider {
    0%, 69.8% { left: 0%; opacity: 0; }
    69.8413% { left: 0%; opacity: 1; }
    78.5% { left: 100%; opacity: 1; }
    78.5714%, 100% { left: 100%; opacity: 0; }
}
@media (prefers-reduced-motion: reduce) {
    .feature-comparison.is-ready .feature-comparison__after,
    .feature-comparison.is-ready .feature-comparison__divider { animation: none; }
    .feature-comparison--transfer.is-ready .feature-comparison__after { animation: none; opacity: 0; }
    .feature-comparison--transfer.is-ready .feature-comparison__result { animation: none; opacity: 1; }
    .feature-comparison--composer.is-ready .feature-comparison__final { animation: none; clip-path: none; }
    .feature-comparison--composer.is-ready .feature-comparison__divider { animation: none; opacity: 0; }
}