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

:root {
    --bg: #f5f0eb;
    --card-bg: #fffcf8;
    --text: #2c2c2c;
    --text-light: #888;
    --accent: #c0392b;
    --accent-light: #fce4e0;
    --highlight-bg: #fff3cd;
    --highlight-border: #ffc107;
    --tooltip-bg: #2c3e50;
    --tooltip-text: #fff;
    --border: #e8e0d8;
    --green: #27ae60;
    --green-bg: #e8f8f0;
}

body {
    font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.9;
    min-height: 100vh;
}

/* ===== 头部 ===== */
header {
    background: linear-gradient(135deg, #2c3e50, #34495e);
    color: #fff;
    padding: 32px 20px;
    text-align: center;
}

.header-inner h1 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 4px;
}

.subtitle {
    font-size: 14px;
    opacity: 0.8;
    margin-bottom: 12px;
}

.mode-btn {
    background: rgba(255,255,255,0.15);
    color: #fff;
    border: 1px solid rgba(255,255,255,0.3);
    padding: 8px 20px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 14px;
    transition: background 0.2s;
}

.mode-btn:hover {
    background: rgba(255,255,255,0.25);
}

/* ===== 工具栏 ===== */
.toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    max-width: 800px;
    margin: 0 auto;
    padding: 16px 20px;
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
}

.toolbar-left {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 13px;
    background: var(--accent-light);
    color: var(--accent);
    font-weight: 600;
}

.badge-green {
    background: var(--green-bg);
    color: var(--green);
}

.toolbar-right {
    display: flex;
    gap: 16px;
    align-items: center;
}

.toggle-label {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-light);
    user-select: none;
}

.toggle-label input[type="checkbox"] {
    width: 16px;
    height: 16px;
    cursor: pointer;
}

/* ===== 小说正文 ===== */
.novel-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 20px;
    background: var(--card-bg);
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    min-height: 300px;
}

.novel-content p {
    margin-bottom: 18px;
    text-indent: 2em;
    font-size: 16px;
}

.novel-content h2 {
    font-size: 22px;
    text-align: center;
    margin-bottom: 24px;
    text-indent: 0;
}

/* ===== 四级单词高亮 ===== */
.cet4-word {
    position: relative;
    cursor: pointer;
    border-bottom: 2px dashed var(--highlight-border);
    background: var(--highlight-bg);
    padding: 0 2px;
    border-radius: 2px;
    transition: background 0.2s;
}

.cet4-word:hover {
    background: #ffe69c;
}

.cet4-word .annotation {
    display: inline;
    font-size: 12px;
    color: var(--accent);
    margin-left: 3px;
    font-weight: 500;
}

/* 中文小说模式：标注的原文关键词也要高亮 */
.cet4-word .cn-keyword {
    display: inline;
    font-size: 13px;
    font-weight: 600;
    color: #1a5276;
    background: #d4e6f1;
    padding: 1px 3px;
    border-radius: 3px;
}

.cet4-word .phonetic {
    display: inline;
    font-size: 11px;
    color: var(--text-light);
    margin-left: 2px;
    font-family: "Times New Roman", serif;
}

/* 关闭高亮模式 */
.hide-highlight .cet4-word {
    border-bottom: none;
    background: transparent;
    cursor: auto;
}

.hide-highlight .cet4-word .annotation,
.hide-highlight .cet4-word .phonetic {
    display: none;
}

/* 关闭音标 */
.hide-phonetic .cet4-word .phonetic {
    display: none;
}

/* ===== 单词列表 ===== */
.word-list-section {
    max-width: 800px;
    margin: 0 auto;
    padding: 30px 20px;
}

.word-list-section h2 {
    font-size: 20px;
    margin-bottom: 16px;
    color: var(--text);
}

.word-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 8px;
}

.word-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 14px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    transition: transform 0.15s, box-shadow 0.15s;
}

.word-item:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.word-item .word-en {
    font-weight: 600;
    color: var(--accent);
}

.word-item .word-cn {
    color: var(--text-light);
    font-size: 13px;
    text-align: right;
}

/* ===== 提示框 ===== */
.tooltip {
    position: fixed;
    z-index: 1000;
    padding: 10px 16px;
    background: var(--tooltip-bg);
    color: var(--tooltip-text);
    border-radius: 8px;
    font-size: 14px;
    line-height: 1.6;
    box-shadow: 0 4px 16px rgba(0,0,0,0.2);
    pointer-events: auto;
    max-width: 320px;
    transition: opacity 0.15s;
}

.tooltip.hidden {
    opacity: 0;
    pointer-events: none;
}

.tooltip .tt-word {
    font-weight: 700;
    font-size: 16px;
    margin-bottom: 2px;
}

.tooltip .tt-phonetic {
    font-size: 13px;
    opacity: 0.7;
    margin-bottom: 4px;
}

.tooltip .tt-meaning {
    font-size: 14px;
}

.tooltip .tt-known-btn {
    display: block;
    margin-top: 8px;
    padding: 5px 14px;
    background: #27ae60;
    color: #fff;
    border: none;
    border-radius: 16px;
    font-size: 12px;
    cursor: pointer;
    transition: background 0.2s;
}

.tooltip .tt-known-btn:hover {
    background: #219a52;
}

.tooltip .tt-known-tag {
    display: block;
    margin-top: 8px;
    font-size: 12px;
    color: #8bc34a;
    text-align: center;
}

/* ===== 加载状态 ===== */
.loading {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-light);
    font-size: 16px;
}

/* ===== 底部 ===== */
footer {
    text-align: center;
    padding: 24px;
    color: var(--text-light);
    font-size: 13px;
}

/* ===== 响应式 ===== */
@media (max-width: 600px) {
    .header-inner h1 {
        font-size: 22px;
    }
    .novel-content {
        padding: 20px 16px;
    }
    .novel-content p {
        font-size: 15px;
    }
    .toolbar {
        flex-direction: column;
        align-items: flex-start;
    }
    .word-list {
        grid-template-columns: 1fr 1fr;
    }
    .tooltip {
        max-width: 220px;
        font-size: 13px;
    }
}

/* ===== 微信登录按钮 ===== */
.btn-wechat {
    background: #07c160;
    color: #fff;
    border: none;
    padding: 6px 16px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 600;
    transition: background 0.2s;
    white-space: nowrap;
}

.btn-wechat:hover {
    background: #06ad56;
}

.btn-logout {
    background: #888;
    color: #fff;
    border: none;
    padding: 4px 12px;
    border-radius: 12px;
    cursor: pointer;
    font-size: 12px;
    margin-left: 6px;
}

.badge-user {
    background: #e8f5e9;
    color: #2e7d32;
    font-size: 13px;
}

/* ===== 微信登录弹窗 ===== */
.modal {
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.2s;
}

.modal.hidden {
    display: none;
}

.modal-content {
    background: #fff;
    border-radius: 16px;
    width: 380px;
    max-width: 90%;
    box-shadow: 0 8px 32px rgba(0,0,0,0.2);
    animation: slideIn 0.25s;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 24px 12px;
    border-bottom: 1px solid #eee;
}

.modal-header h3 {
    font-size: 18px;
    color: #333;
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: #999;
    padding: 0 4px;
    line-height: 1;
}

.modal-close:hover {
    color: #333;
}

.modal-body {
    padding: 24px;
    text-align: center;
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-body img.signin-qrcode-img {
    max-width: 220px;
    border: 1px solid #eee;
    border-radius: 8px;
}

.modal-footer {
    padding: 12px 24px 20px;
    text-align: center;
    font-size: 13px;
    color: #999;
}

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

@keyframes slideIn {
    from { transform: translateY(-20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

/* ===== 首页 - 书籍列表 ===== */
.nav-link {
    color: #666;
    text-decoration: none;
    font-size: 14px;
    padding: 4px 10px;
    border-radius: 4px;
    transition: background 0.2s;
}
.nav-link:hover {
    background: #f0f0f0;
}

.btn-upload {
    background: #1890ff;
    color: #fff;
    border: none;
    padding: 6px 16px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 600;
    transition: background 0.2s;
}
.btn-upload:hover {
    background: #40a9ff;
}

.section-title {
    max-width: 800px;
    margin: 24px auto 16px;
    padding: 0 20px;
    font-size: 20px;
    color: #333;
}

.book-grid {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px 40px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 16px;
}

.book-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    display: flex;
    gap: 16px;
    align-items: flex-start;
}
.book-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0,0,0,0.1);
}

.book-cover {
    width: 60px;
    height: 80px;
    flex-shrink: 0;
    border-radius: 6px;
    overflow: hidden;
    background: #f0f0f0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
}
.book-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.book-info {
    flex: 1;
    min-width: 0;
}

.book-title {
    font-size: 16px;
    font-weight: 700;
    color: #333;
    margin-bottom: 4px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.book-author {
    font-size: 13px;
    color: #888;
    margin-bottom: 8px;
}

.book-meta {
    font-size: 12px;
    color: #aaa;
    display: flex;
    gap: 8px;
    align-items: center;
}

.book-badge-user {
    background: #e6f7ff;
    color: #1890ff;
    padding: 1px 8px;
    border-radius: 10px;
    font-size: 11px;
}

.book-badge-system {
    background: #f6ffed;
    color: #52c41a;
    padding: 1px 8px;
    border-radius: 10px;
    font-size: 11px;
}

/* ===== 上传表单 ===== */
.form-group {
    margin-bottom: 16px;
}
.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: #555;
    margin-bottom: 6px;
}
.form-input {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 14px;
    box-sizing: border-box;
}
.form-input:focus {
    border-color: #1890ff;
    outline: none;
}

.btn-primary {
    background: #1890ff;
    color: #fff;
    border: none;
    padding: 10px 24px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 15px;
    font-weight: 600;
    width: 100%;
    transition: background 0.2s;
}
.btn-primary:hover {
    background: #40a9ff;
}

.upload-progress {
    text-align: center;
    padding: 20px;
}

/* ===== 阅读页 ===== */
.reader-header {
    padding: 16px 20px;
}
.reader-header-inner {
    display: flex;
    align-items: center;
    gap: 16px;
}
.reader-header-inner h1 {
    font-size: 18px;
    flex: 1;
    text-align: center;
    margin: 0;
}
.reader-header-right {
    flex-shrink: 0;
}

.back-link {
    color: #fff;
    text-decoration: none;
    font-size: 14px;
    opacity: 0.8;
    white-space: nowrap;
}
.back-link:hover {
    opacity: 1;
}

.chapter-bar {
    max-width: 800px;
    margin: 0 auto;
    padding: 12px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
}
.chapter-bar-bottom {
    justify-content: center;
    gap: 20px;
    border-top: 1px solid var(--border);
    border-bottom: none;
    margin-top: 0;
    padding: 16px 20px;
}

.chapter-select {
    flex: 1;
    padding: 6px 10px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 14px;
    background: #fff;
    max-width: 300px;
}

.chapter-nav {
    display: flex;
    gap: 8px;
}
.chapter-nav button,
.chapter-bar-bottom button {
    padding: 6px 16px;
    border: 1px solid #ddd;
    border-radius: 6px;
    background: #fff;
    cursor: pointer;
    font-size: 13px;
    transition: all 0.2s;
}
.chapter-nav button:hover:not(:disabled),
.chapter-bar-bottom button:hover:not(:disabled) {
    background: #f0f0f0;
    border-color: #bbb;
}
.chapter-nav button:disabled,
.chapter-bar-bottom button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.reader-toolbar {
    max-width: 800px;
    margin: 0 auto;
    padding: 10px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
}

.btn-small {
    padding: 4px 12px;
    border: 1px solid #ddd;
    border-radius: 16px;
    background: #fff;
    cursor: pointer;
    font-size: 12px;
    transition: all 0.2s;
}
.btn-small:hover {
    background: #f0f0f0;
}

/* 单词本侧栏 */
.word-list-panel {
    position: fixed;
    right: 0;
    top: 0;
    width: 340px;
    height: 100%;
    background: #fff;
    box-shadow: -4px 0 20px rgba(0,0,0,0.1);
    z-index: 2000;
    overflow-y: auto;
    transition: transform 0.3s;
}
.word-list-panel.hidden {
    transform: translateX(100%);
}
.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid #eee;
}
.panel-header h3 {
    font-size: 16px;
    color: #333;
}
.panel-word-list {
    padding: 12px 16px;
}

.word-known-btn {
    padding: 2px 10px;
    border: 1px solid #52c41a;
    color: #52c41a;
    background: #fff;
    border-radius: 12px;
    cursor: pointer;
    font-size: 11px;
    transition: all 0.2s;
}
.word-known-btn:hover {
    background: #52c41a;
    color: #fff;
}

.word-known-tag {
    font-size: 11px;
    color: #52c41a;
    padding: 2px 8px;
}

/* ===== 个人中心 ===== */
.profile-stats {
    max-width: 800px;
    margin: 24px auto 0;
    padding: 0 20px;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
}

.stat-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    text-align: center;
}

.stat-number {
    font-size: 28px;
    font-weight: 700;
    color: #333;
}
.stat-label {
    font-size: 13px;
    color: #888;
    margin-top: 4px;
}
.stat-known .stat-number { color: #52c41a; }
.stat-unknown .stat-number { color: #fa8c16; }
.stat-progress .stat-number { color: #1890ff; }

.progress-bar-container {
    max-width: 800px;
    margin: 16px auto 0;
    padding: 0 20px;
    height: 8px;
    background: #f0f0f0;
    border-radius: 4px;
    overflow: hidden;
}
.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, #52c41a, #1890ff);
    border-radius: 4px;
    transition: width 0.5s;
    width: 0%;
}

.tab-bar {
    max-width: 800px;
    margin: 24px auto 0;
    padding: 0 20px;
    display: flex;
    gap: 0;
    border-bottom: 2px solid #eee;
}
.tab-btn {
    padding: 10px 20px;
    border: none;
    background: none;
    cursor: pointer;
    font-size: 14px;
    color: #888;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all 0.2s;
}
.tab-btn.active {
    color: #1890ff;
    border-bottom-color: #1890ff;
    font-weight: 600;
}
.tab-btn:hover {
    color: #333;
}

.tab-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    min-height: 200px;
}

.word-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 10px;
}

.word-card {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 12px 16px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
}
.word-card.known {
    border-left: 3px solid #52c41a;
}
.word-card.unknown {
    border-left: 3px solid #fa8c16;
}
.wc-word {
    font-weight: 700;
    color: var(--accent);
    font-size: 15px;
}
.wc-meaning {
    color: #888;
    font-size: 13px;
}
.wc-btn-known {
    margin-top: 6px;
    padding: 3px 12px;
    border: 1px solid #52c41a;
    color: #52c41a;
    background: #fff;
    border-radius: 12px;
    cursor: pointer;
    font-size: 12px;
    align-self: flex-start;
}
.wc-btn-known:hover {
    background: #52c41a;
    color: #fff;
}
.wc-btn-undo {
    margin-top: 6px;
    padding: 3px 12px;
    border: 1px solid #fa8c16;
    color: #fa8c16;
    background: #fff;
    border-radius: 12px;
    cursor: pointer;
    font-size: 12px;
    align-self: flex-start;
}
.wc-btn-undo:hover {
    background: #fa8c16;
    color: #fff;
}
.wc-btn-delete {
    margin-top: 6px;
    padding: 3px 12px;
    border: 1px solid #ff4d4f;
    color: #ff4d4f;
    background: #fff;
    border-radius: 12px;
    cursor: pointer;
    font-size: 12px;
    align-self: flex-start;
}
.wc-btn-delete:hover {
    background: #ff4d4f;
    color: #fff;
}

.book-card-uploaded {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
}
.bc-title {
    font-weight: 600;
    font-size: 15px;
    flex: 1;
    min-width: 120px;
}
.bc-author {
    color: #888;
    font-size: 13px;
}
.bc-chapters {
    color: #aaa;
    font-size: 12px;
}

/* ==========================================
   阅读器 - 新样式 (v2)
   ========================================== */

/* 阅读器CSS变量 */
.reader-body {
    --reader-font-size: 16px;
    --reader-line-height: 1.8;
    --reader-bg: #faf8f5;
    --reader-text: #333;
    --reader-accent: #c0392b;
    --reader-border: #e8e0d8;
    --reader-nav-bg: #fff;
    --reader-nav-text: #333;
    --reader-card-bg: #fffcf8;
    --reader-menu-bg: #fff;
    --reader-bar-bg: #f5f0eb;
    --reader-modal-overlay: rgba(0,0,0,0.5);
    --reader-highlight-bg: #fff3cd;
    --reader-highlight-border: #ffc107;
    --reader-tooltip-bg: #2c3e50;
    --reader-tooltip-text: #fff;
    --reader-progress-bg: #ddd;
    --reader-progress-fill: #c0392b;
    min-height: 100vh;
    background: var(--reader-bg);
    color: var(--reader-text);
    font-family: -apple-system, "PingFang SC", "Noto Sans SC", "Source Han Serif SC", "Noto Serif SC", serif;
}

/* 主题：羊皮纸 */
.reader-body.theme-paper {
    --reader-bg: #f5e6c8;
    --reader-text: #5c3d2e;
    --reader-card-bg: #f0dbb0;
    --reader-nav-bg: #f0dbb0;
    --reader-border: #d4b68a;
    --reader-menu-bg: #f5e6c8;
    --reader-bar-bg: #f0dbb0;
    --reader-highlight-bg: #e8c98a;
    --reader-highlight-border: #c8a86a;
}

/* 主题：护眼绿 */
.reader-body.theme-green {
    --reader-bg: #c7edcc;
    --reader-text: #2c4c3b;
    --reader-card-bg: #d2f0d6;
    --reader-nav-bg: #c7edcc;
    --reader-border: #a8d8b0;
    --reader-menu-bg: #c7edcc;
    --reader-bar-bg: #d2f0d6;
    --reader-highlight-bg: #b8d4b0;
    --reader-highlight-border: #8ab890;
}

/* 主题：深色 */
.reader-body.theme-dark {
    --reader-bg: #2d2d2d;
    --reader-text: #ccc;
    --reader-accent: #e57373;
    --reader-card-bg: #383838;
    --reader-nav-bg: #1e1e1e;
    --reader-nav-text: #ccc;
    --reader-border: #444;
    --reader-menu-bg: #2d2d2d;
    --reader-bar-bg: #383838;
    --reader-modal-overlay: rgba(0,0,0,0.7);
    --reader-highlight-bg: #5a4a2a;
    --reader-highlight-border: #7a6a3a;
    --reader-tooltip-bg: #555;
    --reader-tooltip-text: #eee;
    --reader-progress-bg: #555;
    --reader-progress-fill: #e57373;
}

/* 主题：纯黑 */
.reader-body.theme-black {
    --reader-bg: #000;
    --reader-text: #aaa;
    --reader-accent: #e57373;
    --reader-card-bg: #111;
    --reader-nav-bg: #000;
    --reader-nav-text: #aaa;
    --reader-border: #222;
    --reader-menu-bg: #000;
    --reader-bar-bg: #111;
    --reader-modal-overlay: rgba(0,0,0,0.8);
    --reader-highlight-bg: #3a2a10;
    --reader-highlight-border: #5a3a1a;
    --reader-tooltip-bg: #222;
    --reader-tooltip-text: #bbb;
    --reader-progress-bg: #333;
    --reader-progress-fill: #555;
}

/* 导航栏 */
.reader-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: var(--reader-nav-bg);
    border-bottom: 1px solid var(--reader-border);
    transition: transform 0.3s;
}
.reader-nav-inner {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    max-width: 900px;
    margin: 0 auto;
}
.reader-back {
    color: var(--reader-nav-text);
    text-decoration: none;
    font-size: 14px;
    flex-shrink: 0;
    opacity: 0.7;
}
.reader-back:hover { opacity: 1; }
.reader-book-title {
    flex: 1;
    font-size: 15px;
    font-weight: 600;
    text-align: center;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: var(--reader-nav-text);
}
.reader-menu-btn {
    background: none;
    border: 1px solid var(--reader-border);
    border-radius: 6px;
    padding: 4px 10px;
    font-size: 18px;
    cursor: pointer;
    color: var(--reader-nav-text);
    flex-shrink: 0;
    line-height: 1;
}
.reader-menu-btn:hover {
    background: var(--reader-bar-bg);
}

/* 主内容区 */
.reader-main {
    max-width: 900px;
    margin: 48px auto 0;
    padding: 0;
    min-height: calc(100vh - 48px);
}

/* 阅读内容 */
.reader-content {
    background: var(--reader-card-bg);
    padding: 32px 28px 60px;
    font-size: var(--reader-font-size);
    line-height: var(--reader-line-height);
    min-height: 60vh;
}

.reader-content .chapter-title {
    text-align: center;
    font-size: calc(var(--reader-font-size) + 6px);
    font-weight: 700;
    margin-bottom: 28px;
    color: var(--reader-text);
}

.reader-content p {
    margin-bottom: calc(var(--reader-font-size) * 0.6em);
    text-indent: 2em;
    word-break: break-word;
}

/* 加载/错误状态 */
.reader-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 80px 20px;
    color: var(--reader-text);
    opacity: 0.5;
    gap: 12px;
}
.loading-spinner {
    width: 28px;
    height: 28px;
    border: 3px solid var(--reader-border);
    border-top-color: var(--reader-accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.reader-error {
    text-align: center;
    padding: 80px 20px;
    color: var(--reader-accent);
    font-size: var(--reader-font-size);
}

/* 阅读器进度条 */
.reader-progress {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: var(--reader-nav-bg);
    border-top: 1px solid var(--reader-border);
    transition: transform 0.3s;
}
.reader-progress-inner {
    display: flex;
    align-items: center;
    gap: 12px;
    max-width: 900px;
    margin: 0 auto;
    padding: 6px 16px;
}
.reader-progress-inner span {
    font-size: 11px;
    color: var(--reader-text);
    opacity: 0.6;
    white-space: nowrap;
    flex-shrink: 0;
}
.reader-progress-bar {
    flex: 1;
    height: 3px;
    background: var(--reader-progress-bg);
    border-radius: 2px;
    overflow: hidden;
}
.reader-progress-fill {
    height: 100%;
    background: var(--reader-progress-fill);
    border-radius: 2px;
    transition: width 0.3s;
}

/* ===== 底部弹窗 ===== */
.reader-bottom-sheet {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 500;
    display: flex;
    flex-direction: column;
}
.reader-bottom-sheet.hidden {
    display: none;
}
.bottom-sheet-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--reader-modal-overlay);
    z-index: -1;
}
.bottom-sheet-content {
    background: var(--reader-menu-bg);
    border-top-left-radius: 16px;
    border-top-right-radius: 16px;
    padding: 16px 20px 32px;
    box-shadow: 0 -4px 20px rgba(0,0,0,0.12);
    max-height: 70vh;
    overflow-y: auto;
    animation: slideUp 0.25s ease-out;
}
@keyframes slideUp {
    from { transform: translateY(100%); }
    to { transform: translateY(0); }
}

/* 工具栏 */
.reader-toolbar-row {
    display: flex;
    justify-content: space-around;
    padding: 8px 0 16px;
    border-bottom: 1px solid var(--reader-border);
}
.toolbar-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--reader-text);
    padding: 8px 12px;
    border-radius: 8px;
    transition: background 0.2s;
    font-family: inherit;
}
.toolbar-btn:hover {
    background: var(--reader-bar-bg);
}
.tb-icon { font-size: 22px; }
.tb-label { font-size: 11px; opacity: 0.7; }

/* 设置面板 */
.setting-panel {
    padding: 16px 0;
    border-bottom: 1px solid var(--reader-border);
}
.setting-group {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 0;
}
.setting-group label {
    font-size: 14px;
    color: var(--reader-text);
}
.size-control {
    display: flex;
    align-items: center;
    gap: 12px;
}
.size-btn {
    width: 36px;
    height: 36px;
    border: 1px solid var(--reader-border);
    border-radius: 50%;
    background: var(--reader-card-bg);
    cursor: pointer;
    font-size: 16px;
    color: var(--reader-text);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    font-family: inherit;
}
.size-btn:hover {
    background: var(--reader-bar-bg);
    border-color: var(--reader-accent);
}
.size-value {
    font-size: 16px;
    font-weight: 600;
    min-width: 36px;
    text-align: center;
    color: var(--reader-text);
}

/* 主题选择 */
.theme-grid {
    display: flex;
    gap: 12px;
    justify-content: center;
    padding: 8px 0;
}
.theme-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    transition: background 0.2s;
}
.theme-option:hover { background: var(--reader-bar-bg); }
.theme-option.active {
    background: var(--reader-bar-bg);
    outline: 2px solid var(--reader-accent);
}
.theme-option span {
    font-size: 11px;
    color: var(--reader-text);
    opacity: 0.7;
}
.theme-preview {
    width: 44px;
    height: 56px;
    border-radius: 6px;
    border: 2px solid var(--reader-border);
    transition: border-color 0.2s;
}
.theme-preview-default { background: #faf8f5; }
.theme-preview-paper { background: #f5e6c8; }
.theme-preview-green { background: #c7edcc; }
.theme-preview-dark { background: #2d2d2d; }
.theme-preview-black { background: #000; }

/* 更多设置 */
.more-options {
    padding: 4px 0;
}
.toggle-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    font-size: 14px;
    color: var(--reader-text);
    cursor: pointer;
}
.toggle-row input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--reader-accent);
}

/* 底部导航 */
.reader-bottom-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0 0;
    margin-top: 8px;
}
.reader-bottom-nav span {
    font-size: 13px;
    color: var(--reader-text);
    opacity: 0.6;
}
.nav-chapter-btn {
    padding: 8px 20px;
    border: 1px solid var(--reader-border);
    border-radius: 20px;
    background: var(--reader-card-bg);
    cursor: pointer;
    font-size: 13px;
    color: var(--reader-text);
    transition: all 0.2s;
    font-family: inherit;
}
.nav-chapter-btn:hover:not(:disabled) {
    border-color: var(--reader-accent);
    color: var(--reader-accent);
}
.nav-chapter-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

/* ===== 目录弹窗 ===== */
.chapter-list {
    padding: 8px 0;
    max-height: 60vh;
    overflow-y: auto;
}
.chapter-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    cursor: pointer;
    border-radius: 6px;
    transition: background 0.2s;
    margin: 2px 0;
}
.chapter-item:hover {
    background: var(--reader-bar-bg);
}
.chapter-item-active {
    background: var(--reader-bar-bg);
    border-left: 3px solid var(--reader-accent);
}
.chapter-num {
    font-size: 12px;
    color: var(--reader-text);
    opacity: 0.5;
    min-width: 44px;
    flex-shrink: 0;
}
.chapter-title-text {
    flex: 1;
    font-size: 14px;
    color: var(--reader-text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.chapter-current-badge {
    font-size: 11px;
    color: var(--reader-accent);
    background: var(--reader-bar-bg);
    padding: 2px 8px;
    border-radius: 10px;
    flex-shrink: 0;
}

/* ===== 阅读器内英文单词样式适应 ===== */
.reader-content .cet4-word {
    position: relative;
    cursor: pointer;
    border-bottom: 2px dashed var(--reader-highlight-border);
    background: var(--reader-highlight-bg);
    padding: 1px 3px;
    border-radius: 3px;
    transition: background 0.2s;
}
.reader-content .cet4-word:hover {
    background: #ffe69c;
}
.reader-content .cet4-word .word-en {
    display: inline;
    font-weight: 600;
    color: var(--reader-accent);
    font-size: var(--reader-font-size);
}
.reader-content .cet4-word .annotation {
    display: inline;
    font-size: 12px;
    color: var(--reader-accent);
    margin-left: 3px;
    font-weight: 500;
}
.reader-content .cet4-word .cn-keyword {
    display: inline;
    font-size: calc(var(--reader-font-size) - 1px);
    font-weight: 600;
    color: #1a5276;
    background: #d4e6f1;
    padding: 1px 3px;
    border-radius: 3px;
}
.reader-content .cet4-word .phonetic {
    display: inline;
    font-size: 11px;
    color: var(--reader-text);
    opacity: 0.6;
    margin-left: 2px;
    font-family: "Times New Roman", serif;
}

/* 暗色主题适配 */
.reader-body.theme-dark .cet4-word,
.reader-body.theme-black .cet4-word {
    border-bottom-color: #7a6a3a;
}
.reader-body.theme-dark .cet4-word .cn-keyword {
    background: #3a4a6a;
    color: #8ab4f8;
}

/* ===== 提示弹窗适配主题 ===== */
.reader-body .tooltip {
    background: var(--reader-tooltip-bg);
    color: var(--reader-tooltip-text);
}

/* ===== 单词本侧栏适配主题 ===== */
.reader-body .word-list-panel {
    background: var(--reader-menu-bg);
}
.reader-body .word-item {
    background: var(--reader-card-bg);
    border-color: var(--reader-border);
}
.reader-body .word-item .word-en {
    color: var(--reader-accent);
}
.reader-body .word-item .word-cn {
    color: var(--reader-text);
    opacity: 0.6;
}
.reader-body .empty-hint {
    color: var(--reader-text);
    opacity: 0.4;
    padding: 20px;
    text-align: center;
}

/* 隐藏高亮模式 */
.reader-body.hide-highlight .cet4-word {
    border-bottom: none;
    background: transparent;
    cursor: auto;
}
.reader-body.hide-highlight .cet4-word .annotation,
.reader-body.hide-highlight .cet4-word .phonetic,
.reader-body.hide-highlight .cet4-word .word-en,
.reader-body.hide-highlight .cet4-word .cn-keyword {
    display: none;
}

/* 隐藏音标 */
.reader-body.hide-phonetic .cet4-word .phonetic {
    display: none;
}

/* 响应式 */
@media (max-width: 600px) {
    .reader-content {
        padding: 20px 16px 40px;
    }
    .reader-toolbar-row {
        gap: 4px;
    }
    .toolbar-btn {
        padding: 6px 8px;
    }
    .tb-icon { font-size: 18px; }
    .tb-label { font-size: 10px; }
    .theme-grid {
        gap: 8px;
    }
    .theme-preview {
        width: 36px;
        height: 44px;
    }
    .chapter-item {
        padding: 10px 12px;
    }
}

/* 滚动条美化（桌面） */
.reader-content::-webkit-scrollbar {
    width: 6px;
}
.reader-content::-webkit-scrollbar-track {
    background: transparent;
}
.reader-content::-webkit-scrollbar-thumb {
    background: var(--reader-border);
    border-radius: 3px;
}
.chapter-list::-webkit-scrollbar,
.panel-word-list::-webkit-scrollbar {
    width: 4px;
}
.chapter-list::-webkit-scrollbar-thumb,
.panel-word-list::-webkit-scrollbar-thumb {
    background: var(--reader-border);
    border-radius: 2px;
}