/**
 * 画卷相册 - 古代卷轴样式 v1.4
 * 画卷展开效果，自动滚动，全屏查看
 */

:root {
    /* 雅致卷轴配色 */
    --scroll-primary: #5D4637;
    --scroll-secondary: #B79F86;
    --scroll-dark: #35271E;
    --scroll-gold: #BFA06A;
    --scroll-gold-light: #D8C19A;
    --scroll-gold-deep: #8C6B3C;
    --scroll-bg: #F7F2E8;
    --scroll-bg-paper: #EEE4D2;
    --scroll-paper-shadow: rgba(121, 93, 61, 0.1);
    --scroll-shadow: rgba(28, 20, 14, 0.28);
    --scroll-rod-1: #24170F;
    --scroll-rod-2: #433127;
    --scroll-rod-3: #6B5141;
    --scroll-rod-4: #9E836B;
    --scroll-rod-5: #D2BC9C;
    --scroll-rod-highlight: rgba(255,244,224,0.24);
    --scroll-red: #725246;
    --scroll-red-light: rgba(114, 82, 70, 0.12);
    --scroll-height: 600px;
}

/* ==================== 主容器 ==================== */
.scroll-gallery-container {
    position: relative;
    width: 100%;
    margin: 2.5em 0;
    user-select: none;
    -webkit-user-select: none;
}

/* ==================== 卷轴外框 ==================== */
.scroll-gallery-frame {
    position: relative;
    background:
        linear-gradient(180deg, rgba(255,255,255,0.22), transparent 14%),
        linear-gradient(90deg, rgba(191,160,106,0.03) 0%, rgba(255,255,255,0.1) 18%, rgba(255,255,255,0.04) 52%, rgba(191,160,106,0.03) 100%),
        var(--scroll-bg);
    border: 1px solid rgba(191,160,106,0.72);
    outline: 1px solid rgba(93,70,55,0.72);
    outline-offset: 3px;
    border-radius: 10px;
    box-shadow:
        0 0 0 1px rgba(216,193,154,0.52),
        0 12px 34px rgba(53, 39, 30, 0.14),
        0 3px 12px rgba(93, 70, 55, 0.08),
        inset 0 0 0 1px rgba(191,160,106,0.08),
        inset 0 0 60px rgba(121, 93, 61, 0.045),
        inset 0 10px 18px rgba(255,255,255,0.12),
        inset 0 -14px 22px rgba(93, 70, 55, 0.04);
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.35s ease, box-shadow 0.35s ease;
}

.scroll-gallery-frame:hover {
    transform: translateY(-1px);
    box-shadow:
        0 0 0 1px rgba(216,193,154,0.58),
        0 16px 40px rgba(53, 39, 30, 0.18),
        0 5px 16px rgba(93, 70, 55, 0.1),
        inset 0 0 0 1px rgba(191,160,106,0.1),
        inset 0 0 64px rgba(121, 93, 61, 0.05),
        inset 0 10px 20px rgba(255,255,255,0.14),
        inset 0 -14px 22px rgba(93, 70, 55, 0.05);
}

/* 顶部装饰带 — 丝织锦缎感 */
.scroll-gallery-frame::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg,
        rgba(255,255,255,0.18) 0%,
        transparent 10%,
        transparent 90%,
        rgba(53,39,30,0.03) 100%
    );
    z-index: 8;
    pointer-events: none;
}

/* 底部装饰带 */
.scroll-gallery-frame::after {
    content: '';
    position: absolute;
    inset: 16px 54px;
    border: 1px solid rgba(191,160,106,0.08);
    border-radius: 4px;
    z-index: 8;
    pointer-events: none;
}

/* ==================== 卷轴棍 ==================== */
.scroll-frame-left,
.scroll-frame-right {
    position: absolute;
    top: 0;
    width: 42px;
    height: 100%;
    z-index: 10;
    pointer-events: none;
}

.scroll-frame-left {
    left: 0;
    background:
        linear-gradient(180deg, rgba(255,255,255,0.05), transparent 24%, rgba(0,0,0,0.08) 100%),
        linear-gradient(to right,
            var(--scroll-rod-1) 0%,
            var(--scroll-rod-2) 12%,
            #564133 20%,
            var(--scroll-rod-3) 32%,
            var(--scroll-rod-4) 45%,
            var(--scroll-rod-5) 50%,
            #E7D7BB 55%,
            var(--scroll-rod-4) 61%,
            var(--scroll-rod-3) 74%,
            var(--scroll-rod-2) 88%,
            var(--scroll-rod-1) 100%
        );
    box-shadow:
        5px 0 20px rgba(0,0,0,0.2),
        inset -8px 0 14px rgba(0,0,0,0.22),
        inset 2px 0 4px rgba(255,255,255,0.06);
}

/* 左侧卷轴上的纵向纹理 */
.scroll-frame-left::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: repeating-linear-gradient(to bottom,
        transparent 0px,
        rgba(255,255,255,0.03) 1px,
        transparent 2px,
        transparent 6px
    );
    pointer-events: none;
}

.scroll-frame-right {
    right: 0;
    background:
        linear-gradient(180deg, rgba(255,255,255,0.05), transparent 24%, rgba(0,0,0,0.08) 100%),
        linear-gradient(to right,
            var(--scroll-rod-1) 0%,
            var(--scroll-rod-2) 12%,
            #564133 20%,
            var(--scroll-rod-3) 32%,
            var(--scroll-rod-4) 45%,
            var(--scroll-rod-5) 50%,
            #E7D7BB 55%,
            var(--scroll-rod-4) 61%,
            var(--scroll-rod-3) 74%,
            var(--scroll-rod-2) 88%,
            var(--scroll-rod-1) 100%
        );
    box-shadow:
        -5px 0 20px rgba(0,0,0,0.2),
        inset 8px 0 14px rgba(0,0,0,0.22),
        inset -2px 0 4px rgba(255,255,255,0.06);
}

.scroll-frame-right::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: repeating-linear-gradient(to bottom,
        transparent 0px,
        rgba(255,255,255,0.03) 1px,
        transparent 2px,
        transparent 6px
    );
    pointer-events: none;
}

/* 卷轴端盖 — 宝玉石质感 */
.scroll-rod-cap {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 58px;
    height: 20px;
    background:
        radial-gradient(circle at 50% 38%, rgba(255,255,255,0.28), transparent 34%),
        linear-gradient(to bottom,
            var(--scroll-rod-1) 0%,
            #2D2018 10%,
            var(--scroll-rod-2) 22%,
            #8A705B 36%,
            var(--scroll-gold) 48%,
            var(--scroll-gold-light) 52%,
            var(--scroll-gold) 56%,
            #8A705B 68%,
            var(--scroll-rod-2) 82%,
            #2D2018 92%,
            var(--scroll-rod-1) 100%
        );
    border-radius: 9px 9px 7px 7px;
    box-shadow:
        0 6px 13px rgba(0,0,0,0.38),
        0 0 10px rgba(191,160,106,0.2),
        inset 0 2px 3px rgba(255,255,255,0.24),
        inset 0 -2px 4px rgba(0,0,0,0.26);
}

/* 端盖顶部高光 */
.scroll-rod-cap::before {
    content: '';
    position: absolute;
    top: 3px;
    left: 14%;
    right: 14%;
    height: 2px;
    background: linear-gradient(to right,
        transparent,
        rgba(255,255,255,0.34),
        rgba(216,193,154,0.34),
        rgba(255,255,255,0.34),
        transparent
    );
    border-radius: 2px;
}

/* 端盖底部装饰线 */
.scroll-rod-cap::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 20%;
    right: 20%;
    height: 1px;
    background: linear-gradient(to right,
        transparent,
        rgba(191,160,106,0.42),
        transparent
    );
}

.scroll-rod-cap-top { top: 6px; }
.scroll-rod-cap-bottom { bottom: 6px; }

/* 卷轴棍身 — 圆柱木质渐变 */
.scroll-rod-body {
    position: absolute;
    left: 50%;
    top: 28px;
    bottom: 28px;
    width: 34px;
    transform: translateX(-50%);
    background:
        linear-gradient(180deg, rgba(255,255,255,0.08), transparent 20%, rgba(0,0,0,0.11) 100%),
        linear-gradient(to right,
            var(--scroll-rod-1) 0%,
            #3F2C21 8%,
            var(--scroll-rod-3) 18%,
            var(--scroll-rod-4) 28%,
            var(--scroll-rod-5) 40%,
            #E7D7BB 49%,
            var(--scroll-rod-5) 58%,
            var(--scroll-rod-4) 70%,
            var(--scroll-rod-3) 82%,
            #3F2C21 92%,
            var(--scroll-rod-1) 100%
        );
    border-radius: 6px;
    box-shadow:
        inset 0 3px 10px rgba(0,0,0,0.26),
        inset 0 -2px 6px rgba(255,255,255,0.04),
        inset 3px 0 5px rgba(0,0,0,0.12),
        inset -3px 0 5px rgba(0,0,0,0.12),
        0 3px 10px rgba(0,0,0,0.2);
}

/* 棍身高光纹理 */
.scroll-rod-body::before {
    content: '';
    position: absolute;
    top: 4px;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%);
    width: 16px;
    background: linear-gradient(to bottom,
        transparent 0%,
        var(--scroll-rod-highlight) 15%,
        rgba(255,235,200,0.15) 50%,
        var(--scroll-rod-highlight) 85%,
        transparent 100%
    );
    border-radius: 3px;
}

/* 棍身横向节纹 */
.scroll-rod-body::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: repeating-linear-gradient(to bottom,
        transparent 0px,
        rgba(62,31,20,0.06) 2px,
        transparent 4px,
        transparent 18px,
        rgba(62,31,20,0.04) 20px,
        transparent 22px
    );
    border-radius: 5px;
    pointer-events: none;
}

/* ==================== 视野区域 ==================== */
.scroll-gallery-viewport {
    position: relative;
    width: 100%;
    height: var(--gallery-height, var(--scroll-height));
    overflow: hidden;
    background:
        radial-gradient(circle at 50% 14%, rgba(255,255,255,0.32), transparent 28%),
        radial-gradient(circle at 20% 30%, rgba(220,200,170,0.12) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(180,160,130,0.08) 0%, transparent 52%),
        linear-gradient(180deg, rgba(255,255,255,0.22) 0%, transparent 16%, rgba(121,93,61,0.04) 100%),
        repeating-linear-gradient(0deg,
            transparent 0 18px,
            rgba(121,93,61,0.018) 18px 19px,
            transparent 19px 36px
        ),
        var(--scroll-bg);
}

.scroll-gallery-viewport::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        linear-gradient(90deg,
            rgba(93, 70, 55, 0.08) 0%,
            transparent 8%,
            transparent 92%,
            rgba(93, 70, 55, 0.08) 100%
        ),
        linear-gradient(180deg,
            rgba(255,255,255,0.12) 0%,
            transparent 12%,
            transparent 88%,
            rgba(53,39,30,0.04) 100%
        );
    pointer-events: none;
    z-index: 1;
}

/* ==================== 图片轨道 ==================== */
.scroll-gallery-track {
    display: flex;
    flex-direction: row;
    height: 100%;
    will-change: transform;
}

/* ==================== 单个图片 ==================== */
.scroll-gallery-item {
    position: relative;
    flex-shrink: 0;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background:
        linear-gradient(180deg, rgba(255,255,255,0.08), transparent 18%, rgba(93,70,55,0.03) 100%),
        var(--scroll-bg);
    overflow: hidden;
}

.scroll-gallery-item::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(255,255,255,0.03), transparent 14%, transparent 86%, rgba(93,70,55,0.03));
    pointer-events: none;
}

.scroll-gallery-item img {
    position: relative;
    z-index: 1;
    height: 100%;
    width: auto;
    max-width: none;
    object-fit: cover;
    display: block;
    opacity: 0;
    filter: saturate(0.96) contrast(1) brightness(1.01);
    animation: scrollFadeIn 0.6s ease forwards;
}

@keyframes scrollFadeIn {
    from { opacity: 0; transform: scale(0.98); }
    to { opacity: 1; transform: scale(1); }
}

/* ==================== 装饰金线 ==================== */
.scroll-decorative-line {
    position: absolute;
    left: 52px;
    right: 52px;
    height: 1px;
    background: linear-gradient(to right,
        transparent 0%,
        rgba(191,160,106,0.06) 12%,
        rgba(191,160,106,0.3) 50%,
        rgba(191,160,106,0.06) 88%,
        transparent 100%
    );
    z-index: 5;
    opacity: 0.5;
    box-shadow: none;
}

.scroll-decorative-line-top { top: 0; }
.scroll-decorative-line-bottom { bottom: 0; }

/* ==================== 顶部提示 ==================== */
.scroll-gallery-hint-top {
    position: absolute;
    top: 12px;
    left: 50%;
    transform: translateX(-50%);
    padding: 6px 18px;
    background: rgba(247, 242, 232, 0.78);
    color: #6B5141;
    font-size: 13px;
    border-radius: 999px;
    z-index: 15;
    pointer-events: none;
    backdrop-filter: blur(8px);
    letter-spacing: 0.8px;
    border: 1px solid rgba(191,160,106,0.32);
    box-shadow:
        0 4px 12px rgba(53,39,30,0.12),
        inset 0 1px 0 rgba(255,255,255,0.28);
    white-space: nowrap;
}

/* ==================== 底部提示 ==================== */
.scroll-gallery-hint {
    position: absolute;
    bottom: 12px;
    left: 50%;
    transform: translateX(-50%);
    padding: 6px 18px;
    background: rgba(247, 242, 232, 0.74);
    color: #6B5141;
    font-size: 13px;
    border-radius: 999px;
    z-index: 15;
    pointer-events: none;
    backdrop-filter: blur(8px);
    letter-spacing: 0.8px;
    border: 1px solid rgba(191,160,106,0.3);
    box-shadow:
        0 4px 12px rgba(53,39,30,0.12),
        inset 0 1px 0 rgba(255,255,255,0.26);
    white-space: nowrap;
}

/* ==================== 错误/提示 ==================== */
.scroll-gallery-error {
    color: #721c24;
    background: #f8d7da;
    padding: 1em;
    border-radius: 4px;
    text-align: center;
    margin: 1em 0;
}

.scroll-gallery-placeholder {
    padding: 40px;
    background: var(--scroll-bg);
    border: 2px dashed var(--scroll-primary);
    text-align: center;
    color: var(--scroll-dark);
}

/* ==================== 全屏查看器 ==================== */
.scroll-gallery-fullscreen {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 99999;
}

.scroll-gallery-fullscreen.active {
    display: block;
    animation: fullscreenFadeIn 0.3s ease;
}

@keyframes fullscreenFadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* 全屏遮罩 */
.scroll-fullscreen-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(24, 20, 17, 0.8);
    backdrop-filter: blur(14px);
}

/* 全屏内容 */
.scroll-fullscreen-content {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 全屏卷轴框 */
.scroll-fullscreen-viewport {
    position: relative;
    width: calc(100% - 160px);
    height: calc(100% - 180px);
    overflow: hidden;
    background:
        linear-gradient(180deg, rgba(255,255,255,0.18), transparent 14%),
        linear-gradient(90deg, rgba(191,160,106,0.02) 0%, rgba(255,255,255,0.06) 18%, rgba(255,255,255,0.03) 52%, rgba(191,160,106,0.02) 100%),
        var(--scroll-bg);
    border: 1px solid rgba(191,160,106,0.45);
    outline: 1px solid rgba(93,70,55,0.52);
    outline-offset: 4px;
    border-radius: 14px;
    box-shadow:
        0 26px 80px rgba(0,0,0,0.24),
        0 8px 24px rgba(53,39,30,0.08),
        inset 0 0 0 1px rgba(191,160,106,0.08),
        inset 0 0 56px rgba(121,93,61,0.035);
    cursor: grab;
}

/* 全屏卷轴框上下装饰 */
.scroll-fullscreen-viewport::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg,
        rgba(255,255,255,0.16) 0%,
        transparent 10%,
        transparent 90%,
        rgba(53,39,30,0.03) 100%
    );
    z-index: 5;
    pointer-events: none;
}

.scroll-fullscreen-viewport::after {
    content: '';
    position: absolute;
    inset: 18px 52px;
    border: 1px solid rgba(191,160,106,0.07);
    border-radius: 6px;
    z-index: 5;
    pointer-events: none;
}

/* 全屏左右卷轴 */
.fs-scroll-rod-left,
.fs-scroll-rod-right {
    position: absolute;
    top: 0;
    width: 36px;
    height: 100%;
    z-index: 6;
    pointer-events: none;
}

.fs-scroll-rod-left {
    left: 0;
    background: linear-gradient(to right,
        var(--scroll-rod-1) 0%,
        var(--scroll-rod-2) 15%,
        var(--scroll-rod-3) 30%,
        var(--scroll-rod-4) 45%,
        var(--scroll-rod-5) 50%,
        var(--scroll-rod-4) 55%,
        var(--scroll-rod-3) 70%,
        var(--scroll-rod-2) 85%,
        var(--scroll-rod-1) 100%
    );
    box-shadow: 4px 0 20px rgba(0,0,0,0.6), inset -4px 0 10px rgba(0,0,0,0.25);
}

.fs-scroll-rod-right {
    right: 0;
    background: linear-gradient(to right,
        var(--scroll-rod-1) 0%,
        var(--scroll-rod-2) 15%,
        var(--scroll-rod-3) 30%,
        var(--scroll-rod-4) 45%,
        var(--scroll-rod-5) 50%,
        var(--scroll-rod-4) 55%,
        var(--scroll-rod-3) 70%,
        var(--scroll-rod-2) 85%,
        var(--scroll-rod-1) 100%
    );
    box-shadow: -4px 0 20px rgba(0,0,0,0.6), inset 4px 0 10px rgba(0,0,0,0.25);
}

/* 全屏图片轨道 */
.scroll-fullscreen-track {
    display: flex;
    flex-direction: row;
    height: 100%;
    will-change: transform;
}

.scroll-fullscreen-item {
    flex-shrink: 0;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.scroll-fullscreen-item img {
    height: 100%;
    width: auto;
    max-width: none;
    object-fit: contain;
}

/* 全屏关闭按钮 */
.scroll-fullscreen-close {
    position: absolute;
    top: 18px;
    right: 30px;
    width: 44px;
    height: 44px;
    background: rgba(247, 242, 232, 0.74);
    border: 1px solid rgba(191,160,106,0.24);
    border-radius: 50%;
    color: #6B5141;
    font-size: 24px;
    line-height: 1;
    cursor: pointer;
    z-index: 20;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow:
        0 10px 24px rgba(0,0,0,0.12),
        inset 0 1px 0 rgba(255,255,255,0.22);
    backdrop-filter: blur(10px);
}

.scroll-fullscreen-close:hover {
    background: rgba(247, 242, 232, 0.92);
    border-color: rgba(191,160,106,0.36);
    color: var(--scroll-dark);
    transform: scale(1.06) rotate(90deg);
}

/* 全屏导航按钮 */
.scroll-fullscreen-prev,
.scroll-fullscreen-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 72px;
    background: rgba(247, 242, 232, 0.74);
    border: 1px solid rgba(191,160,106,0.24);
    color: #6B5141;
    font-size: 34px;
    cursor: pointer;
    z-index: 20;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
    box-shadow:
        0 10px 24px rgba(0,0,0,0.12),
        inset 0 1px 0 rgba(255,255,255,0.22);
    padding: 0;
    backdrop-filter: blur(10px);
}

.scroll-fullscreen-prev {
    left: 18px;
    padding-right: 4px;
}

.scroll-fullscreen-next {
    right: 18px;
    padding-left: 4px;
}

.scroll-fullscreen-prev:hover,
.scroll-fullscreen-next:hover {
    background: rgba(247, 242, 232, 0.92);
    border-color: rgba(191,160,106,0.36);
    color: var(--scroll-dark);
    transform: translateY(-50%) scale(1.04);
}

.scroll-fullscreen-prev:active,
.scroll-fullscreen-next:active {
    transform: translateY(-50%) scale(0.96);
}

/* 全屏计数器 */
.scroll-fullscreen-counter {
    position: absolute;
    top: 18px;
    left: 50%;
    transform: translateX(-50%);
    padding: 7px 18px;
    background: rgba(247, 242, 232, 0.72);
    color: #6B5141;
    font-size: 14px;
    border-radius: 999px;
    z-index: 20;
    border: 1px solid rgba(191, 160, 106, 0.24);
    letter-spacing: 0.8px;
    box-shadow: 0 8px 18px rgba(0,0,0,0.1);
    backdrop-filter: blur(10px);
}

/* 全屏底部提示 */
.scroll-fullscreen-hint {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    color: rgba(247, 242, 232, 0.68);
    font-size: 12px;
    z-index: 20;
    letter-spacing: 0.4px;
}

/* ==================== 响应式 ==================== */
@media (max-width: 768px) {
    :root {
        --scroll-height: 350px;
    }
    
    .scroll-frame-left,
    .scroll-frame-right {
        width: 24px;
    }
    
    .scroll-rod-cap {
        width: 32px;
        height: 11px;
    }
    
    .scroll-rod-cap-top { top: 6px; }
    .scroll-rod-cap-bottom { bottom: 6px; }
    
    .scroll-rod-body {
        top: 17px;
        bottom: 17px;
        width: 18px;
    }
    
    .scroll-decorative-line {
        left: 24px;
        right: 24px;
    }
    
    .scroll-gallery-hint {
        font-size: 11px;
        padding: 3px 12px;
    }
    
    .scroll-fullscreen-viewport {
        width: calc(100% - 80px);
        height: calc(100% - 120px);
    }
    
    .fs-scroll-rod-left,
    .fs-scroll-rod-right {
        width: 24px;
    }
    
    .scroll-fullscreen-prev,
    .scroll-fullscreen-next {
        width: 38px;
        height: 65px;
        font-size: 30px;
    }
    
    .scroll-fullscreen-prev { left: 10px; }
    .scroll-fullscreen-next { right: 10px; }
    
    .scroll-fullscreen-close {
        width: 40px;
        height: 40px;
        font-size: 22px;
        right: 15px;
        top: 15px;
    }
    
    .scroll-fullscreen-counter {
        top: 15px;
        font-size: 14px;
        padding: 5px 16px;
    }
    
    .scroll-fullscreen-hint {
        font-size: 11px;
    }
}