/* 拾光相馆：封套架、显影光圈与观片工作台 */
.floor-basement {
    --darkroom-black: #090607;
    --darkroom-red: #5b151b;
    --darkroom-paper: #eee9df;
    --darkroom-metal: #77706a;
    --darkroom-gold: #d4a84f;
    --darkroom-envelope-width: clamp(240px, 16vw, 320px);
    --darkroom-envelope-height: clamp(230px, 29vh, 310px);
    --darkroom-column-gap: clamp(30px, 3vw, 58px);
    --darkroom-row-gap: clamp(44px, 6vh, 68px);
    background:
        linear-gradient(90deg, rgba(29, 8, 11, 0.28), transparent 35%, rgba(17, 7, 9, 0.22)),
        #090607;
    color: var(--darkroom-paper);
}

.darkroom-safelight {
    position: absolute;
    inset: 0;
    z-index: 0;
    background:
        linear-gradient(to bottom, rgba(112, 25, 31, 0.3), transparent 20%),
        radial-gradient(ellipse 62% 28% at 50% 0%, rgba(156, 42, 45, 0.26), transparent 76%);
    pointer-events: none;
}

.darkroom-safelight::before {
    position: absolute;
    top: 0;
    left: 20%;
    width: 60%;
    height: 3px;
    background: rgba(174, 55, 52, 0.48);
    box-shadow: 0 0 32px 10px rgba(116, 27, 30, 0.2);
    content: '';
    animation: darkroomSafelightBreath 5s ease-in-out infinite;
}

@keyframes darkroomSafelightBreath {
    0%, 100% { opacity: 0.45; }
    50% { opacity: 0.9; }
}

.floor-heading-basement {
    z-index: 18;
    max-width: min(430px, calc(100vw - 180px));
}

.floor-heading-basement h2 {
    text-shadow: 0 2px 24px rgba(0, 0, 0, 0.62);
}

.floor-heading-basement .darkroom-progress {
    margin-top: 10px;
    color: rgba(238, 233, 223, 0.74);
    font-family: var(--font-body);
    font-size: 0.76rem;
    font-variant-numeric: tabular-nums;
}

.darkroom-dust {
    position: absolute;
    inset: 0;
    z-index: 5;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.floor-basement .basement-spotlight {
    --spot-x: 56%;
    --spot-y: 48%;
    position: absolute;
    inset: 0;
    z-index: 10;
    background: rgba(2, 1, 2, 0.46);
    opacity: 1;
    pointer-events: none;
    -webkit-mask-image: radial-gradient(circle clamp(300px, 25vw, 480px) at var(--spot-x) var(--spot-y), transparent 0, transparent 45%, rgba(0, 0, 0, 0.28) 72%, #000 100%);
    mask-image: radial-gradient(circle clamp(300px, 25vw, 480px) at var(--spot-x) var(--spot-y), transparent 0, transparent 45%, rgba(0, 0, 0, 0.28) 72%, #000 100%);
}

body.is-floor-basement:not(.floor-reduced-motion) .basement-spotlight:not(.is-following) {
    animation: darkroomSpotlight 15s linear infinite alternate;
}

.darkroom-section-nav {
    position: absolute;
    top: 50%;
    right: clamp(14px, 2.4vw, 38px);
    z-index: 19;
    display: grid;
    gap: 1px;
    max-height: calc(100svh - 110px);
    padding-left: 12px;
    overflow-y: auto;
    transform: translateY(-50%);
    scrollbar-width: none;
}

.darkroom-section-nav[hidden],
.darkroom-workbench[hidden],
.darkroom-lightbox[hidden] {
    display: none;
}

.darkroom-section-nav::-webkit-scrollbar {
    display: none;
}

.darkroom-section-nav::before {
    position: absolute;
    top: 3px;
    bottom: 3px;
    left: 0;
    width: 1px;
    background: rgba(238, 233, 223, 0.12);
    content: '';
}

.darkroom-section-nav button {
    position: relative;
    min-width: 74px;
    min-height: 36px;
    padding: 5px 8px;
    border: 0;
    background: transparent;
    color: rgba(238, 233, 223, 0.54);
    font-family: var(--font-body);
    font-size: 0.7rem;
    font-variant-numeric: tabular-nums;
    text-align: right;
    cursor: pointer;
    transition: color 180ms ease;
}

.darkroom-section-nav button::before {
    position: absolute;
    top: 50%;
    left: -12px;
    width: 7px;
    height: 1px;
    background: transparent;
    content: '';
    transform: translateY(-50%);
    transition: width 180ms ease, background-color 180ms ease;
}

.darkroom-section-nav button:hover,
.darkroom-section-nav button:focus-visible,
.darkroom-section-nav button.is-active {
    color: rgba(255, 250, 240, 0.92);
}

.darkroom-section-nav button.is-active::before {
    width: 12px;
    background: var(--darkroom-gold);
}

.darkroom-section-nav button[data-section="7SENSES"] {
    margin-top: 7px;
    padding-top: 9px;
    border-top: 1px solid rgba(238, 233, 223, 0.1);
}

.darkroom-rack-viewport {
    position: absolute;
    inset: clamp(150px, 18vh, 180px) 102px 70px 0;
    z-index: 3;
    overflow-x: hidden;
    overflow-y: auto;
    outline: none;
    overscroll-behavior: contain;
    scrollbar-color: rgba(212, 168, 79, 0.3) transparent;
    scrollbar-width: thin;
    touch-action: pan-y;
}

.darkroom-rack-viewport:focus-visible {
    box-shadow: inset 0 0 0 1px rgba(212, 168, 79, 0.38);
}

.darkroom-rack-viewport::-webkit-scrollbar {
    width: 5px;
}

.darkroom-rack-viewport::-webkit-scrollbar-thumb {
    border-radius: 0;
    background: rgba(212, 168, 79, 0.3);
}

.darkroom-rack-stage {
    display: flex;
    flex-direction: column;
    gap: var(--darkroom-row-gap);
    width: 100%;
    min-width: 0;
    min-height: 100%;
    padding: 0 7vw 30px;
    opacity: 1;
    transform: translateY(0);
    transition: opacity 180ms ease, transform 220ms ease;
}

.darkroom-rack-stage.is-columnar {
    display: grid;
    grid-template-columns: repeat(var(--wire-count, 1), minmax(0, 1fr));
    align-items: start;
    gap: clamp(24px, 3vw, 48px);
}

.darkroom-rack-stage.is-changing {
    opacity: 0;
    transform: translateY(7px);
}

.darkroom-loading {
    position: absolute;
    top: 50%;
    left: 50%;
    z-index: 1;
    color: rgba(238, 233, 223, 0.44);
    transform: translate(-50%, -50%);
}

.darkroom-loading[hidden] {
    display: none;
}

.darkroom-wire {
    position: relative;
    min-width: 0;
    min-height: 0;
    padding-top: 37px;
}

.darkroom-wire::before {
    position: absolute;
    top: 31px;
    right: -7vw;
    left: -7vw;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(174, 159, 148, 0.33) 4%, rgba(174, 159, 148, 0.4) 96%, transparent);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.7);
    content: '';
}

.darkroom-wire-label {
    position: absolute;
    top: 4px;
    left: 0;
    color: rgba(238, 233, 223, 0.58);
    font-family: var(--font-body);
    font-size: 0.68rem;
    white-space: nowrap;
}

.darkroom-wire-sets {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(var(--darkroom-envelope-width), 1fr));
    align-items: start;
    gap: var(--darkroom-row-gap) var(--darkroom-column-gap);
}

.darkroom-envelope {
    --swing: 0deg;
    position: relative;
    justify-self: center;
    width: var(--darkroom-envelope-width);
    height: var(--darkroom-envelope-height);
    min-height: 150px;
    padding: 0;
    border: 0;
    background: transparent;
    color: #241a16;
    cursor: pointer;
    transform: rotate(var(--swing));
    transform-origin: 50% -7px;
}

body.is-floor-basement:not(.floor-reduced-motion) .darkroom-envelope {
    animation: darkroomEnvelopeSwing 6s ease-in-out infinite alternate;
    animation-delay: var(--swing-delay, 0s);
}

@keyframes darkroomEnvelopeSwing {
    from { transform: rotate(calc(var(--swing) - 0.65deg)); }
    to { transform: rotate(calc(var(--swing) + 0.65deg)); }
}

.darkroom-envelope:focus-visible {
    outline: 2px solid var(--darkroom-gold);
    outline-offset: 5px;
}

.darkroom-envelope-clip {
    position: absolute;
    top: -10px;
    left: 50%;
    z-index: 5;
    width: 22px;
    height: 35px;
    border: 1px solid #615a55;
    border-radius: 2px 2px 5px 5px;
    background: linear-gradient(90deg, #645c55, #9b9188 48%, #5c554f 52%, #77706a);
    box-shadow: 0 3px 5px rgba(0, 0, 0, 0.42);
    transform: translateX(-50%);
}

.darkroom-envelope-clip::after {
    position: absolute;
    top: 5px;
    left: 50%;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: #393431;
    content: '';
    transform: translateX(-50%);
}

.darkroom-envelope-photo {
    position: absolute;
    top: 8px;
    left: 8%;
    z-index: 1;
    display: grid;
    width: 84%;
    height: 64%;
    padding: 4px;
    place-items: center;
    overflow: hidden;
    background: #e9e5dd;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.34);
}

.darkroom-envelope-photo img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: contain;
    opacity: 0.12;
    filter: blur(10px) grayscale(1) contrast(1.55) brightness(0.58);
    transition: filter 3s cubic-bezier(0.2, 0.7, 0.25, 1), opacity 2.2s ease;
}

.darkroom-envelope.is-developing .darkroom-envelope-photo img,
.darkroom-envelope.is-developed .darkroom-envelope-photo img {
    opacity: 1;
    filter: blur(0) grayscale(0) contrast(1) brightness(1);
}

.darkroom-envelope-paper {
    position: absolute;
    inset: 44% 0 0;
    z-index: 3;
    padding: clamp(28px, 3.6vh, 36px) 14px 11px;
    overflow: hidden;
    border: 1px solid rgba(76, 48, 32, 0.42);
    background:
        linear-gradient(125deg, rgba(255, 255, 255, 0.08), transparent 28%),
        repeating-linear-gradient(0deg, rgba(79, 46, 27, 0.025) 0 1px, transparent 1px 4px),
        #a7794e;
    box-shadow: 0 8px 17px rgba(0, 0, 0, 0.3);
    text-align: left;
}

.darkroom-envelope-paper::before,
.darkroom-envelope-paper::after {
    position: absolute;
    top: -1px;
    width: 58%;
    height: 31px;
    border-bottom: 1px solid rgba(78, 48, 30, 0.3);
    background: #ae7e53;
    content: '';
}

.darkroom-envelope-paper::before {
    left: -8%;
    transform: skewY(17deg);
    transform-origin: left top;
}

.darkroom-envelope-paper::after {
    right: -8%;
    transform: skewY(-17deg);
    transform-origin: right top;
}

.darkroom-envelope-title {
    position: relative;
    z-index: 2;
    display: -webkit-box;
    overflow: hidden;
    color: #241814;
    font-family: KaiTi, STKaiti, var(--font-heading);
    font-size: 0.86rem;
    line-height: 1.35;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
}

.darkroom-envelope-meta {
    position: absolute;
    right: 10px;
    bottom: 9px;
    left: 10px;
    z-index: 2;
    display: flex;
    justify-content: space-between;
    color: rgba(40, 25, 19, 0.64);
    font-family: var(--font-body);
    font-size: 0.6rem;
    font-variant-numeric: tabular-nums;
}

.darkroom-envelope-check {
    position: absolute;
    top: 36%;
    right: -7px;
    z-index: 7;
    display: grid;
    width: 22px;
    height: 22px;
    border: 1px solid rgba(62, 42, 22, 0.5);
    border-radius: 50%;
    place-items: center;
    background: var(--darkroom-gold);
    box-shadow: 0 2px 7px rgba(0, 0, 0, 0.4);
    color: #24180e;
    font-size: 0.72rem;
    opacity: 0;
    transform: scale(0.72) rotate(-12deg);
    transition: opacity 180ms ease, transform 220ms ease;
}

.darkroom-envelope.is-developed .darkroom-envelope-check {
    opacity: 1;
    transform: scale(1) rotate(-6deg);
}

.darkroom-workbench {
    position: fixed;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 36;
    height: 48svh;
    min-height: 330px;
    padding: 18px clamp(20px, 5vw, 74px) 22px;
    border-top: 1px solid rgba(91, 69, 49, 0.5);
    background:
        radial-gradient(ellipse 65% 100% at 50% 100%, rgba(255, 250, 226, 0.72), transparent 80%),
        linear-gradient(180deg, #d9d0bd, #eee8d7 52%, #c9bda6);
    box-shadow: 0 -18px 48px rgba(0, 0, 0, 0.48), inset 0 12px 45px rgba(255, 249, 225, 0.4);
    color: #211a16;
    transform: translateY(0);
    animation: darkroomWorkbenchUp 420ms cubic-bezier(0.2, 0.8, 0.25, 1);
}

@keyframes darkroomWorkbenchUp {
    from { transform: translateY(100%); }
    to { transform: translateY(0); }
}

.darkroom-workbench::before {
    position: absolute;
    inset: 9px;
    border: 1px solid rgba(92, 73, 54, 0.18);
    pointer-events: none;
    content: '';
}

.darkroom-workbench-header {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: start;
    justify-content: space-between;
    gap: 20px;
    min-height: 56px;
}

.darkroom-workbench-header span {
    color: rgba(33, 26, 22, 0.48);
    font-size: 0.62rem;
    font-variant-numeric: tabular-nums;
}

.darkroom-workbench-header h3 {
    margin: 3px 0 0;
    font-family: var(--font-heading);
    font-size: clamp(1rem, 2vw, 1.25rem);
    font-weight: 500;
}

.darkroom-workbench-close {
    min-height: 44px;
    padding: 8px 14px;
    border: 1px solid rgba(48, 35, 27, 0.25);
    border-radius: 4px;
    background: rgba(255, 252, 242, 0.28);
    color: #33261f;
    font-family: var(--font-body);
    font-size: 0.72rem;
    cursor: pointer;
}

.darkroom-workbench-prints {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: clamp(12px, 3vw, 34px);
    height: calc(100% - 62px);
    overflow-x: auto;
    overflow-y: hidden;
    scrollbar-width: none;
}

.darkroom-workbench-prints::-webkit-scrollbar {
    display: none;
}

.darkroom-work-print {
    --print-angle: 0deg;
    flex: 0 0 auto;
    height: min(26svh, 230px);
    max-width: min(34vw, 310px);
    padding: 7px 7px 24px;
    border: 0;
    background: #f8f5ec;
    box-shadow: 0 8px 18px rgba(46, 34, 25, 0.24);
    cursor: zoom-in;
    opacity: 0;
    transform: translateY(-28px) rotate(var(--print-angle));
    animation: darkroomPrintDrop 460ms cubic-bezier(0.2, 0.75, 0.28, 1.15) forwards;
    animation-delay: var(--print-delay, 0s);
    transition: box-shadow 180ms ease;
}

.darkroom-work-print:hover,
.darkroom-work-print:focus-visible {
    box-shadow: 0 15px 25px rgba(46, 34, 25, 0.3);
    outline: 2px solid rgba(91, 21, 27, 0.62);
    outline-offset: 3px;
}

.darkroom-work-print img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: contain;
}

@keyframes darkroomPrintDrop {
    to { opacity: 1; transform: translateY(0) rotate(var(--print-angle)); }
}

.darkroom-lightbox {
    position: fixed;
    inset: 0;
    z-index: 1800;
    display: grid;
    grid-template-columns: 56px minmax(0, 1fr) 56px;
    align-items: center;
    gap: clamp(8px, 3vw, 34px);
    padding: 54px clamp(12px, 4vw, 58px) 22px;
    background: rgba(5, 3, 4, 0.97);
}

.darkroom-lightbox figure {
    display: grid;
    gap: 10px;
    min-width: 0;
    max-height: calc(100svh - 76px);
    margin: 0;
}

.darkroom-lightbox-paper {
    display: grid;
    width: fit-content;
    max-width: 100%;
    max-height: calc(100svh - 118px);
    margin: auto;
    padding: clamp(7px, 1vw, 12px) clamp(7px, 1vw, 12px) clamp(20px, 2.4vw, 36px);
    place-items: center;
    background: #f5f1e8;
    box-shadow: 0 20px 55px rgba(0, 0, 0, 0.48);
}

.darkroom-lightbox img {
    display: block;
    max-width: 100%;
    max-height: calc(100svh - 166px);
    object-fit: contain;
}

.darkroom-lightbox figcaption {
    color: rgba(238, 233, 223, 0.66);
    font-size: 0.72rem;
    text-align: center;
}

.darkroom-lightbox-close,
.darkroom-lightbox-step {
    display: grid;
    width: 48px;
    height: 48px;
    padding: 0;
    border: 1px solid rgba(238, 233, 223, 0.14);
    border-radius: 4px;
    place-items: center;
    background: rgba(18, 13, 14, 0.72);
    color: rgba(238, 233, 223, 0.78);
    font-size: 1.1rem;
    cursor: pointer;
}

.darkroom-lightbox-close {
    position: absolute;
    top: max(10px, env(safe-area-inset-top, 0px));
    right: 12px;
}

.darkroom-lightbox-step:disabled {
    opacity: 0.22;
    cursor: default;
}

.darkroom-handoff {
    position: fixed;
    inset: 0;
    z-index: 120;
    display: none;
    overflow: hidden;
    perspective: 900px;
    pointer-events: none;
}

body.floor-darkroom-transition .darkroom-handoff {
    display: block;
}

.darkroom-handoff-card {
    position: fixed;
    top: 0;
    left: 0;
    padding: 6px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 9px;
    background: rgba(255, 255, 255, 0.13);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.34);
    transform-origin: center;
    will-change: transform, opacity;
}

.darkroom-handoff-card img {
    display: block;
    width: 100%;
    height: 100%;
    border-radius: 4px;
    object-fit: cover;
}

body.floor-darkroom-transition .wiki-header,
body.floor-darkroom-transition #tab-nav,
body.floor-darkroom-transition .stars-bg,
body.floor-darkroom-transition .floating-gallery,
body.floor-darkroom-transition .floor-entry,
body.floor-darkroom-transition .hero-photo-count {
    transition: none;
}

body.floor-darkroom-transition .floor-entry {
    pointer-events: none;
}

@media (max-width: 720px) {
    .floor-basement {
        --darkroom-envelope-width: 118px;
        --darkroom-envelope-height: 154px;
        --darkroom-column-gap: 17px;
        --darkroom-row-gap: 34px;
    }

    .floor-heading-basement {
        max-width: calc(100vw - 88px);
    }

    .floor-heading-basement h2 {
        font-size: 2rem;
    }

    .floor-heading-basement .darkroom-progress {
        margin-top: 5px;
        font-size: 0.66rem;
    }

    .darkroom-section-nav {
        top: auto;
        right: 96px;
        bottom: max(10px, env(safe-area-inset-bottom, 0px));
        left: 12px;
        display: flex;
        max-height: none;
        padding: 0;
        overflow-x: auto;
        transform: none;
    }

    .darkroom-section-nav::before {
        top: auto;
        right: 0;
        bottom: 0;
        left: 0;
        width: auto;
        height: 1px;
    }

    .darkroom-section-nav button {
        flex: 0 0 auto;
        min-width: 52px;
        min-height: 44px;
        padding: 7px 8px;
        text-align: center;
    }

    .darkroom-section-nav button::before {
        top: auto;
        bottom: 0;
        left: 50%;
        width: 1px;
        height: 5px;
        transform: translateX(-50%);
    }

    .darkroom-section-nav button.is-active::before {
        width: 16px;
    }

    .darkroom-section-nav button[data-section="7SENSES"] {
        margin: 0 0 0 7px;
        padding: 7px 8px 7px 9px;
        border-top: 0;
        border-left: 1px solid rgba(238, 233, 223, 0.1);
    }

    .darkroom-rack-viewport {
        inset: 92px 0 64px;
    }

    .darkroom-rack-stage {
        gap: 34px;
        padding-right: 22px;
        padding-bottom: 28px;
        padding-left: 18px;
    }

    .darkroom-rack-stage.is-columnar {
        display: flex;
        align-items: stretch;
    }

    .darkroom-wire::before {
        right: -22px;
        left: -18px;
    }

    .darkroom-wire-sets {
        grid-template-columns: repeat(auto-fit, minmax(118px, 1fr));
        gap: 34px 17px;
    }

    .darkroom-envelope {
        width: 118px;
        height: 154px;
        min-height: 124px;
    }

    .darkroom-envelope-photo {
        left: 12px;
        width: 94px;
        height: 92px;
    }

    .darkroom-envelope-paper {
        inset: 58px 0 0;
        padding: 25px 9px 8px;
    }

    .darkroom-envelope-title {
        font-size: 0.66rem;
    }

    .darkroom-envelope-meta {
        right: 8px;
        bottom: 7px;
        left: 8px;
        font-size: 0.51rem;
    }

    .darkroom-envelope-check {
        top: 43px;
        right: -5px;
    }

    .floor-basement .basement-spotlight {
        background: rgba(2, 1, 2, 0.4);
        -webkit-mask-image: radial-gradient(circle 180px at 50% 24%, transparent 0, transparent 42%, rgba(0, 0, 0, 0.28) 72%, #000 100%);
        mask-image: radial-gradient(circle 180px at 50% 24%, transparent 0, transparent 42%, rgba(0, 0, 0, 0.28) 72%, #000 100%);
    }

    .darkroom-workbench {
        height: 56svh;
        min-height: 0;
        padding: 14px 14px max(14px, env(safe-area-inset-bottom, 0px));
    }

    .darkroom-workbench-header {
        min-height: 66px;
    }

    .darkroom-workbench-header h3 {
        max-width: calc(100vw - 140px);
        font-size: 0.92rem;
    }

    .darkroom-workbench-prints {
        justify-content: flex-start;
        gap: 16px;
        height: calc(100% - 68px);
        padding: 4px 26px;
        scroll-snap-type: x mandatory;
    }

    .darkroom-workbench-prints.is-single {
        justify-content: center;
    }

    .darkroom-work-print {
        height: min(35svh, 290px);
        max-width: 76vw;
        scroll-snap-align: center;
    }

    .darkroom-lightbox {
        grid-template-columns: 44px minmax(0, 1fr) 44px;
        gap: 5px;
        padding: 54px 6px 18px;
    }

    .darkroom-lightbox-step {
        width: 44px;
        height: 44px;
    }

    .darkroom-lightbox-paper {
        padding-bottom: 22px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .darkroom-safelight::before,
    .darkroom-envelope,
    .darkroom-work-print {
        animation: none !important;
    }

    .darkroom-rack-stage,
    .darkroom-envelope-photo img,
    .darkroom-envelope-check {
        transition-duration: 1ms !important;
    }

    .darkroom-work-print {
        opacity: 1;
        transform: none;
    }

    .darkroom-dust {
        display: none;
    }
}