/* ===== 基础重置 ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --sidebar-width: 220px;
    --topbar-height: 64px;
    --primary: #5b6e8c;
    --primary-light: #7d92b0;
    --accent: #c9a96e;
    --bg: #f5f2ed;
    --card-bg: #ffffff;
    --text: #2c2c2c;
    --text-light: #8a8a8a;
    --border: #e5ddd4;
    --shadow: rgba(0, 0, 0, 0.06);
    --radius: 10px;
    --transition: 0.25s ease;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    line-height: 1.6;
}

/* ===== 左侧菜单栏 ===== */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: linear-gradient(180deg, #3d4f6a 0%, #2c3e50 100%);
    color: #fff;
    display: flex;
    flex-direction: column;
    z-index: 100;
    transition: transform var(--transition);
    box-shadow: 2px 0 20px rgba(0, 0, 0, 0.1);
}

.sidebar-header {
    padding: 28px 20px 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-header h2 {
   font-size: 1.35rem;
   font-weight: 600;
   letter-spacing: 2px;
   color: #e8ddd0;
}

.sidebar-menu {
   list-style: none;
   padding: 12px 0;
   flex: 1;
}

.menu-item {
   display: flex;
   align-items: center;
   gap: 12px;
   padding: 14px 24px;
   cursor: pointer;
   transition: all var(--transition);
   border-left: 3px solid transparent;
   font-size: 0.95rem;
   color: rgba(255, 255, 255, 0.75);
    position: relative;
}

.menu-item:hover {
   background: rgba(255, 255, 255, 0.08);
   color: #fff;
}

.menu-item.active {
   background: rgba(255, 255, 255, 0.12);
   border-left-color: var(--accent);
   color: #fff;
   font-weight: 500;
}

.menu-icon {
   font-size: 1.2rem;
   width: 24px;
   text-align: center;
}

/* ===== 侧边栏子菜单 ===== */
.submenu-arrow {
    margin-left: auto;
    font-size: 0.7rem;
    opacity: 0.5;
    transition: transform 0.2s ease;
}

.menu-item:hover .submenu-arrow {
    opacity: 0.8;
}

.submenu {
    display: none;
    position: absolute;
    left: 100%;
    top: 0;
    min-width: 160px;
    background: #34495e;
    border-radius: 0 8px 8px 8px;
    list-style: none;
    padding: 6px 0;
    box-shadow: 4px 4px 20px rgba(0, 0, 0, 0.25);
    z-index: 300;
}

.menu-item:hover .submenu {
    display: block;
}

.submenu-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 18px;
    font-size: 0.88rem;
    color: rgba(255, 255, 255, 0.8);
    cursor: pointer;
    transition: all 0.15s;
    white-space: nowrap;
}

.submenu-item:hover {
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
}

.submenu-item.active-branch {
    background: rgba(201, 169, 110, 0.2);
    color: var(--accent);
    font-weight: 500;
}

/* 移动端子菜单改为向下展开 */
@media (max-width: 768px) {
    .sidebar.open .submenu {
        display: none;
        position: static;
        background: rgba(0, 0, 0, 0.15);
        box-shadow: none;
        border-radius: 6px;
        margin: 4px 12px;
        padding: 4px 0;
    }

    .sidebar.open .menu-item:hover .submenu {
        display: block;
    }

    .submenu-item {
        padding: 8px 16px;
        font-size: 0.85rem;
    }
}
@@
.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.4);
    text-align: center;
    letter-spacing: 1px;
}

/* ===== 主区域 ===== */
.main-wrapper {
    margin-left: var(--sidebar-width);
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* ===== 顶部搜索栏 ===== */
.top-bar {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(245, 242, 237, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 0 32px;
    height: var(--topbar-height);
    display: flex;
    align-items: center;
    justify-content: center;
    border-bottom: 1px solid var(--border);
}

.search-container {
    position: relative;
    width: 100%;
    max-width: 520px;
}

.search-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.9rem;
    opacity: 0.5;
    pointer-events: none;
}

.search-input {
    width: 100%;
    padding: 10px 40px 10px 40px;
    border: 1px solid var(--border);
    border-radius: 24px;
    font-size: 0.9rem;
    background: #fff;
    transition: all var(--transition);
    outline: none;
    color: var(--text);
}

.search-input::placeholder {
    color: #b8b0a8;
    font-size: 0.85rem;
}

.search-input:focus {
    border-color: var(--primary-light);
    box-shadow: 0 0 0 3px rgba(91, 110, 140, 0.12);
}

.search-clear {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    font-size: 0.85rem;
    color: var(--text-light);
    cursor: pointer;
    padding: 4px 6px;
    display: none;
    border-radius: 50%;
    transition: background var(--transition);
}

.search-clear:hover {
    background: var(--border);
}

.search-clear.visible {
    display: block;
}

/* 搜索建议下拉 */
.search-suggestions {
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    right: 0;
    background: #fff;
    border-radius: var(--radius);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
    max-height: 300px;
    overflow-y: auto;
    display: none;
    z-index: 200;
}

.search-suggestions.active {
    display: block;
}

.search-suggestion-item {
    padding: 12px 16px;
    cursor: pointer;
    transition: background 0.15s;
    border-bottom: 1px solid var(--border);
    font-size: 0.9rem;
}

.search-suggestion-item:last-child {
    border-bottom: none;
}

.search-suggestion-item:hover {
    background: #f0ece6;
}

.search-suggestion-item .highlight {
    color: var(--accent);
    font-weight: 500;
}

.search-no-result {
    padding: 20px 16px;
    text-align: center;
    color: var(--text-light);
    font-size: 0.85rem;
}

/* ===== 内容区 ===== */
.content {
    flex: 1;
    padding: 32px;
    max-width: 800px;
    margin: 0 auto;
    width: 100%;
}

/* ===== 列表视图 ===== */
.section-header {
    margin-bottom: 28px;
}

.section-header h1 {
    font-size: 1.6rem;
    font-weight: 600;
    color: var(--text);
    letter-spacing: 1px;
}

.section-header p {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-top: 4px;
}

.story-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.story-item {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 18px 24px;
    cursor: pointer;
    transition: all var(--transition);
    border: 1px solid var(--border);
    position: relative;
}

.story-item:hover {
    transform: translateX(4px);
    border-color: var(--primary-light);
    box-shadow: 0 4px 16px var(--shadow);
}

.story-item .story-title {
    font-size: 1.05rem;
    font-weight: 500;
    color: var(--text);
}

.story-item .story-arrow {
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-light);
    font-size: 0.85rem;
    opacity: 0;
    transition: opacity var(--transition);
}

.story-item:hover .story-arrow {
    opacity: 1;
}

.story-count {
    color: var(--text-light);
    font-size: 0.8rem;
    margin-top: 16px;
    text-align: center;
}

/* ===== 详情视图 ===== */
.detail-view {
    animation: fadeIn 0.3s ease;
}

.detail-header {
    margin-bottom: 24px;
}

.detail-back {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--text-light);
    cursor: pointer;
    font-size: 0.9rem;
    transition: color var(--transition);
    background: none;
    border: none;
    padding: 4px 0;
}

.detail-back:hover {
    color: var(--primary);
}

.detail-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-top: 12px;
    color: var(--text);
}

.detail-content {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 28px 32px;
    border: 1px solid var(--border);
    line-height: 1.9;
    font-size: 1rem;
    color: #3a3a3a;
}

/* ===== 纪念照视图（占位） ===== */
.placeholder-view {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 80px 20px;
    text-align: center;
}

.placeholder-view .placeholder-icon {
    font-size: 4rem;
    margin-bottom: 20px;
    opacity: 0.6;
}

.placeholder-view h2 {
    font-size: 1.3rem;
    color: var(--text);
    margin-bottom: 8px;
}

.placeholder-view p {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* ===== 动画 ===== */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ===== 移动端适配 ===== */
.menu-toggle {
    display: none;
    position: fixed;
    top: 14px;
    left: 14px;
    z-index: 200;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 8px 12px;
    font-size: 1.3rem;
    cursor: pointer;
    box-shadow: 0 2px 10px var(--shadow);
    transition: all var(--transition);
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .main-wrapper {
        margin-left: 0;
    }

    .menu-toggle {
        display: block;
    }

    .top-bar {
        padding: 0 16px;
        padding-left: 56px;
    }

    .content {
        padding: 20px 16px;
    }

    .detail-content {
        padding: 20px;
    }

    .story-item {
        padding: 14px 18px;
    }
}

/* ===== 滚动条美化 ===== */
.search-suggestions::-webkit-scrollbar {
    width: 4px;
}

.search-suggestions::-webkit-scrollbar-track {
    background: transparent;
}

.search-suggestions::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 2px;
}
.back-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    color: var(--text-light);
    cursor: pointer;
    font-size: 0.85rem;
    transition: color var(--transition);
    background: none;
    border: none;
    padding: 4px 0;
    margin-bottom: 8px;
}

.back-link:hover {
    color: var(--primary);
}

/* ===== 分支卡片 ===== */
.branch-grid {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.branch-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 24px 28px;
    cursor: pointer;
    transition: all var(--transition);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 18px;
}

.branch-card:hover {
    transform: translateX(6px);
    border-color: var(--primary-light);
    box-shadow: 0 4px 20px var(--shadow);
}

.branch-icon {
    font-size: 2.2rem;
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg);
    border-radius: 12px;
    flex-shrink: 0;
}

.branch-name {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 2px;
}

.branch-desc {
    font-size: 0.85rem;
    color: var(--text-light);
    margin-bottom: 0;
}

.branch-count {
    margin-left: auto;
    font-size: 0.8rem;
    color: var(--text-light);
    background: var(--bg);
    padding: 4px 12px;
    border-radius: 20px;
    flex-shrink: 0;
}

/* ===== 故事标签 ===== */
.story-item .story-tag {
    font-size: 0.75rem;
    color: var(--text-light);
    background: var(--bg);
    padding: 2px 10px;
    border-radius: 10px;
    margin-left: 10px;
    flex-shrink: 0;
}

.search-suggestion-tag {
    font-size: 0.7rem;
    color: var(--text-light);
    background: var(--bg);
    padding: 1px 8px;
    border-radius: 8px;
    margin-left: 6px;
}

@media (max-width: 768px) {
    .branch-card {
        padding: 18px 20px;
    }

    .branch-icon {
        font-size: 1.8rem;
        width: 48px;
        height: 48px;
    }
}
@@
/* ===== PDF 查看器 ===== */
.pdf-viewer {
    display: flex;
    flex-direction: column;
    animation: fadeIn 0.3s ease;
}

.pdf-header {
    flex-shrink: 0;
}

.pdf-header h1 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 2px;
}

.pdf-header p {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.pdf-embed-wrapper {
    border-radius: var(--radius);
    overflow: hidden;
    overflow-y: auto;
    border: 1px solid var(--border);
    background: #f0ece6;
    height: calc(100vh - var(--topbar-height) - 140px);
}

.pdf-embed {
    width: 100%;
    height: 100%;
    border: none;
}

@media (max-width: 768px) {
    .pdf-embed-wrapper {
        height: calc(100vh - var(--topbar-height) - 120px);
    }
}
@@
/* ===== 纪录片图片查看器 ===== */
.documentary-viewer {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    animation: fadeIn 0.3s ease;
}

.documentary-image-wrapper {
    width: 100%;
    max-width: 700px;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
    background: #fff;
    box-shadow: 0 4px 20px var(--shadow);
}

.documentary-image {
    display: block;
    width: 100%;
    height: auto;
    cursor: zoom-in;
    transition: transform 0.2s ease;
}

.documentary-image:hover {
    transform: scale(1.01);
}
@@
/* ===== 翻页书阅读器 ===== */
.book-viewer {
    display: flex;
    flex-direction: column;
    animation: fadeIn 0.3s ease;
}

.book-header {
    flex-shrink: 0;
    margin-bottom: 16px;
}

.book-header h1 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 2px;
}

.book-header p {
    color: var(--text-light);
    font-size: 0.85rem;
}

.book-body {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    flex: 1;
}

.book-page-wrapper {
    flex: 1;
    max-width: 750px;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.book-page {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 4px;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.12), 0 1px 4px rgba(0, 0, 0, 0.08);
    transition: opacity 0.15s ease;
    background: #fff;
}

.book-page-num {
    position: absolute;
    bottom: -32px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.85rem;
    color: var(--text-light);
    background: var(--bg);
    padding: 4px 16px;
    border-radius: 20px;
    white-space: nowrap;
}

.book-nav {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--card-bg);
    color: var(--text);
    font-size: 1.6rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    line-height: 1;
}

.book-nav:hover:not(:disabled) {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
    box-shadow: 0 4px 12px rgba(91, 110, 140, 0.3);
}

.book-nav:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.book-nav:focus-visible {
    outline: 2px solid var(--primary-light);
    outline-offset: 2px;
}

@media (max-width: 768px) {
    .book-page-wrapper {
        max-width: 100%;
    }

    .book-nav {
        width: 40px;
        height: 40px;
        font-size: 1.3rem;
    }

    .book-body {
        gap: 8px;
    }
}
@@
.scan-notice {
    font-size: 0.8rem;
    color: #b8860b;
    margin-top: 2px;
    line-height: 1.4;
}
@@
.photo-notice {
    font-size: 0.8rem;
    color: #b8860b;
    margin-top: 2px;
}

/* ===== 照片墙 ===== */
.photo-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 10px;
    animation: fadeIn 0.3s ease;
}

.photo-item {
    border-radius: 8px;
    overflow: hidden;
    cursor: pointer;
    border: 1px solid var(--border);
    transition: all 0.2s ease;
    background: #fff;
    aspect-ratio: auto;
}

.photo-item:hover {
    transform: scale(1.02);
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.12);
    border-color: var(--primary-light);
}

.photo-thumb {
    display: block;
    width: 100%;
    height: auto;
    transition: transform 0.3s ease;
}

/* ===== 灯箱 ===== */
.lightbox-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.88);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.2s ease;
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 24px;
    background: rgba(255, 255, 255, 0.15);
    border: none;
    color: #fff;
    font-size: 1.4rem;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    cursor: pointer;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s;
}

.lightbox-close:hover {
    background: rgba(255, 255, 255, 0.3);
}

.lightbox-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.12);
    border: none;
    color: #fff;
    font-size: 2.5rem;
    width: 52px;
    height: 52px;
    border-radius: 50%;
    cursor: pointer;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s;
    line-height: 1;
}

.lightbox-nav:hover {
    background: rgba(255, 255, 255, 0.3);
}

.lightbox-prev {
    left: 20px;
}

.lightbox-next {
    right: 20px;
}

.lightbox-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    max-width: 90vw;
    max-height: 90vh;
}

.lightbox-image {
    max-width: 100%;
    max-height: calc(90vh - 50px);
    object-fit: contain;
    border-radius: 6px;
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.3);
}

.lightbox-counter {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.85rem;
    margin-top: 12px;
    letter-spacing: 1px;
}

@media (max-width: 768px) {
    .photo-gallery {
        grid-template-columns: repeat(2, 1fr);
        gap: 6px;
    }

    .lightbox-nav {
        width: 40px;
        height: 40px;
        font-size: 1.8rem;
    }

    .lightbox-prev { left: 8px; }
    .lightbox-next { right: 8px; }
}
@@
.story-notice {
    font-size: 0.78rem;
    color: #b8860b;
    margin-top: 6px;
    line-height: 1.5;
    padding: 8px 12px;
    background: rgba(184, 134, 11, 0.06);
    border-radius: 6px;
    border-left: 3px solid #b8860b;
}
@@
.load-notice {
    font-size: 0.78rem;
    color: #b8860b;
    margin-top: 4px;
    line-height: 1.4;
    padding: 6px 12px;
    background: rgba(184, 134, 11, 0.06);
    border-radius: 6px;
    border-left: 3px solid #b8860b;
}
@@