/* ══════════════════════════════════════
   溯源：古籍平行文本檢索系統 — 方案A 素白
   ══════════════════════════════════════ */

/* ── 首屏動畫 S4：墨跡掃過 ── */
.splash {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 16px;
    transition: opacity 0.6s ease;
}

.splash-hide {
    opacity: 0;
    pointer-events: none;
}

.splash-title {
    font-family: 'Noto Serif SC', serif;
    font-size: 48px;
    font-weight: 700;
    letter-spacing: 14px;
    background: linear-gradient(90deg, #1a1a1a 50%, transparent 50%);
    background-size: 200% 100%;
    background-position: 100% 0;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: splashSweep 1.2s 0.2s ease forwards;
}

.splash-sub {
    font-family: 'Noto Serif SC', serif;
    font-size: 13px;
    font-weight: 400;
    letter-spacing: 6px;
    color: transparent;
    background: linear-gradient(90deg, rgba(0,0,0,0.35) 50%, transparent 50%);
    background-size: 200% 100%;
    background-position: 100% 0;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: splashSweep 1s 0.6s ease forwards;
}

@keyframes splashSweep {
    from { background-position: 100% 0; }
    to { background-position: 0 0; }
}

:root {
    --text: #1a1a1a;
    --text-2: #888;
    --text-3: #bbb;
    --bg: #fff;
    --bg-alt: #fafafa;
    --border: #eee;
    --border-light: #f5f5f5;
    --radius: 8px;
    --font-ui: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --font-content: 'Noto Serif SC', 'Songti SC', serif;
    --transition: 0.15s ease;
}

body {
    font-family: var(--font-ui);
    background: var(--bg);
    margin: 0;
    overflow: hidden;
    height: 100vh;
    color: var(--text);
    -webkit-font-smoothing: antialiased;
}

/* ── 顶栏 ── */
.app-header {
    height: 40px;
    background: #1a1a1a;
    display: flex;
    align-items: center;
    padding: 0 24px;
}

.app-header .app-title {
    font-family: 'LXGW WenKai TC', serif;
    font-size: 18px;
    font-weight: 700;
    color: rgba(255,255,255,0.85);
    letter-spacing: 5px;
    text-decoration: none;
    transition: opacity 0.3s ease;
    cursor: pointer;
}

.app-header .app-title:hover {
    opacity: 0.5;
}

.app-header .app-subtitle {
    font-size: 12px;
    font-weight: 400;
    color: rgba(255,255,255,0.35);
    letter-spacing: 2px;
    margin-left: 12px;
}

/* ── 双面板 ── */
.main-container {
    display: flex;
    height: calc(100vh - 40px);
}

.left-panel, .right-panel {
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.left-panel {
    width: 42%;
    background: var(--bg);
    border-right: 1px solid var(--border-light);
}

.left-panel .panel-body {
    padding-top: 32px;
}

.right-panel {
    width: 58%;
    background: #fcfcfc;
}

.panel-body {
    flex: 1;
    overflow-y: auto;
    padding: 28px;
}

/* ── 搜索/输入分隔 ── */
.input-divider {
    display: flex;
    align-items: center;
    margin: 18px 0;
    font-size: 11px;
    color: var(--text-3);
}

.input-divider::before,
.input-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
}

.input-divider span {
    padding: 0 12px;
    font-family: 'LXGW WenKai TC', serif;
}

/* ── 输入区 ── */
#inputText {
    font-family: var(--font-content);
    font-size: 14px;
    line-height: 1.8;
    resize: vertical;
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 16px 18px;
    transition: border-color var(--transition);
    background: var(--bg);
    color: var(--text);
}

#inputText:focus {
    border-color: #aaa;
    outline: none;
}

#inputText::placeholder {
    color: var(--text-3);
}

/* 分析按钮 */
#analyzeBtn {
    font-family: 'LXGW WenKai TC', serif;
    background: var(--text);
    border: none;
    border-radius: 10px;
    padding: 12px 0;
    font-size: 14px;
    font-weight: 400;
    color: #fff;
    letter-spacing: 2px;
    transition: opacity var(--transition);
}

#analyzeBtn:hover {
    opacity: 0.8;
}

/* ── 典籍搜索 ── */
#browseArea .input-group-text {
    background: var(--bg-alt);
    border-color: var(--border);
    color: var(--text-3);
}

#browseArea .form-control {
    border-color: var(--border);
    font-size: 14px;
}

#browseArea .form-control::placeholder {
    color: var(--text-3);
}

#browseArea .form-control:focus {
    border-color: #aaa;
    box-shadow: none;
}

/* ── 句子列表 ── */
.sentence-list {
    font-family: var(--font-content);
    line-height: 2.2;
    font-size: 15px;
}

.sentence-span {
    cursor: pointer;
    padding: 2px 0;
    transition: background var(--transition);
    border-radius: 2px;
}

.sentence-span:hover {
    background: rgba(0,0,0,0.04);
}

.sentence-span.selected {
    background: rgba(0,0,0,0.07);
}

/* 匹配色带 */
.sentence-span.has-cbeta {
    background: linear-gradient(to top, rgba(0,0,0,0.12) 0%, rgba(0,0,0,0.12) 2px, transparent 2px);
}

.sentence-span.has-classics {
    background: linear-gradient(to top, rgba(0,0,0,0.08) 0%, rgba(0,0,0,0.08) 2px, transparent 2px);
}

.sentence-span.has-both {
    background: linear-gradient(to top, rgba(0,0,0,0.08) 0%, rgba(0,0,0,0.08) 1px, rgba(0,0,0,0.12) 1px, rgba(0,0,0,0.12) 2px, transparent 2px);
}

/* ── 来源提示 ── */
.source-hint {
    font-size: 12px;
    color: #666;
    background: var(--bg-alt);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 8px 12px;
    margin-bottom: 10px;
    line-height: 1.5;
}
.source-hint .source-title { font-weight: 600; color: var(--text); }
.source-hint .source-corpus {
    display: inline-block;
    font-size: 11px;
    padding: 1px 6px;
    border-radius: 3px;
    margin-left: 4px;
    background: var(--border);
    color: #666;
}
.source-hint .corpus-cbeta { background: var(--border); color: #666; }
.source-hint .corpus-classics { background: var(--border); color: #666; }
.source-hint .source-action {
    margin-left: 6px;
    font-size: 11px;
    color: var(--text-2);
    cursor: pointer;
    text-decoration: underline;
}
.source-hint .source-action:hover { color: var(--text); }

/* ── Tab（胶囊） ── */
.nav-tabs-sm {
    border-bottom: none;
    gap: 2px;
}

.nav-tabs-sm .nav-link {
    font-family: 'LXGW WenKai TC', serif;
    font-size: 13px;
    font-weight: 400;
    padding: 6px 16px;
    border: none;
    border-radius: 8px;
    color: var(--text-2);
    transition: all var(--transition);
    background: transparent;
}

.nav-tabs-sm .nav-link:hover {
    color: var(--text);
    background: rgba(0,0,0,0.04);
}

.nav-tabs-sm .nav-link.active {
    color: #fff;
    background: var(--text);
    font-weight: 600;
}

/* ── 结果卡片 ── */
.result-card {
    border: 1px solid #f0f0f0;
    border-radius: 10px;
    padding: 16px 18px;
    margin-bottom: 10px;
    background: var(--bg);
    transition: border-color var(--transition);
}

.result-card:hover {
    border-color: #ccc;
}

.result-card .result-meta {
    font-size: 12px;
    color: var(--text-2);
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.result-card .result-text {
    font-family: var(--font-content);
    font-size: 15px;
    line-height: 1.8;
    color: var(--text);
}

.result-card .result-context {
    font-family: var(--font-content);
    font-size: 14px;
    color: #777;
    margin-top: 6px;
    line-height: 1.8;
}

/* 相似度 */
.score-badge {
    display: inline-block;
    font-size: 11px;
    font-weight: 600;
    color: var(--text-3);
    white-space: nowrap;
    font-family: var(--font-ui);
}

/* 语料库徽章 */
.corpus-badge {
    font-size: 10px;
    padding: 2px 8px;
    border-radius: 4px;
    font-weight: 600;
    font-family: var(--font-ui);
    background: #f0f0f0;
    color: #666;
}

.corpus-badge.cbeta { background: #f0f0f0; color: #666; }
.corpus-badge.classics { background: #f0f0f0; color: #666; }

/* 分类 / 朝代 */
.cat-badge, .dynasty-badge {
    font-size: 11px;
    color: var(--text-3);
    white-space: nowrap;
}

/* 作者名 */
.author-sep { color: #ddd; margin: 0 2px; }
.dynasty-years { font-size: 10px; color: var(--text-3); margin-left: 3px; }
.author-name { color: var(--text-2); font-size: 12px; }

/* 聚类卷号 */
.cluster-juan { font-size: 11px; color: var(--text-2); }

/* ── 证据卡片 ── */
.evidence-card .evidence-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
    flex-wrap: wrap;
}

.evidence-citation {
    font-size: 12px;
    font-weight: 400;
    color: var(--text-2);
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.citation-link {
    cursor: pointer;
    color: var(--text-2);
    text-decoration: none;
    transition: color var(--transition);
}

.citation-link:hover {
    color: var(--text);
    text-decoration: underline;
}

.evidence-meta { font-size: 12px; color: var(--text-2); margin-top: 4px; }

.btn-copy {
    border: none;
    background: transparent;
    color: var(--text-3);
    cursor: pointer;
    padding: 2px 6px;
    font-size: 13px;
    border-radius: 4px;
    flex-shrink: 0;
    transition: color var(--transition);
}

.btn-copy:hover { color: var(--text); }

.result-count {
    font-size: 12px;
    color: var(--text-2);
    margin-bottom: 14px;
}

/* ── 设置面板 ── */
.filter-label { font-size: 12px; color: var(--text-2); white-space: nowrap; min-width: 56px; }
.filter-range { flex: 1; max-width: 160px; height: 4px; accent-color: #333; }


.settings-row { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.settings-row:last-child { margin-bottom: 0; }
.settings-label { font-size: 12px; color: var(--text-2); white-space: nowrap; min-width: 56px; }
.settings-val { font-size: 12px; font-weight: 600; color: #555; min-width: 36px; text-align: right; }

.filter-select-sm {
    font-size: 12px;
    padding: 3px 8px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--bg);
}

/* ── 聚簇卡片 ── */
.cluster-card {
    border: 1px solid #f0f0f0;
    border-radius: 10px;
    margin-bottom: 10px;
    background: var(--bg);
    overflow: hidden;
}

.cluster-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 18px;
    background: var(--bg-alt);
    cursor: pointer;
    border-bottom: 1px solid var(--border-light);
    flex-wrap: wrap;
    transition: background var(--transition);
}

.cluster-header:hover { background: #f2f2f2; }

.cluster-title { font-size: 13px; font-weight: 600; color: var(--text); flex: 1; min-width: 0; }
.cluster-count { font-size: 12px; font-weight: 400; color: var(--text-2); margin-left: 6px; }
.cluster-chevron { font-size: 12px; color: var(--text-3); transition: transform 0.2s; }

.cluster-card.collapsed .cluster-body { display: none; }
.cluster-card.collapsed .cluster-chevron { transform: rotate(-90deg); }
.cluster-body { padding: 0; }

.result-card.in-cluster {
    border: none;
    border-radius: 0;
    margin-bottom: 0;
    border-bottom: 1px solid var(--border-light);
    padding: 10px 14px;
}

.result-card.in-cluster:hover { border-color: var(--border-light); }
.result-card.in-cluster:last-child { border-bottom: none; }

/* ── 空状态提示 ── */
.empty-hint {
    text-align: center;
    padding-top: 160px;
}

.empty-hint p {
    font-family: 'LXGW WenKai TC', serif;
    font-size: 14px;
    color: #ccc;
    letter-spacing: 1px;
}

/* LCS 高亮 */
.lcs-match {
    color: #000;
    font-weight: 600;
}

/* ── 加载 ── */
.loading-spinner { text-align: center; padding: 40px 0; color: var(--text-2); }

/* ── 句组 ── */
.sentence-group {
    display: inline;
    cursor: pointer;
    padding: 1px 0;
    border-radius: 2px;
    transition: background var(--transition);
}

.sentence-group:hover { background: rgba(0,0,0,0.04); }
.sentence-group.selected { background: rgba(0,0,0,0.07); }

.sentence-group.has-cbeta {
    background: linear-gradient(to top, rgba(0,0,0,0.12) 0%, rgba(0,0,0,0.12) 2px, transparent 2px);
}
.sentence-group.has-classics {
    background: linear-gradient(to top, rgba(0,0,0,0.08) 0%, rgba(0,0,0,0.08) 2px, transparent 2px);
}
.sentence-group.has-both {
    background: linear-gradient(to top, rgba(0,0,0,0.08) 0%, rgba(0,0,0,0.08) 1px, rgba(0,0,0,0.12) 1px, rgba(0,0,0,0.12) 2px, transparent 2px);
}

.sentence-group.selected.has-cbeta {
    background: linear-gradient(to top, rgba(0,0,0,0.15) 0%, rgba(0,0,0,0.15) 2px, rgba(0,0,0,0.05) 2px);
}
.sentence-group.selected.has-classics {
    background: linear-gradient(to top, rgba(0,0,0,0.1) 0%, rgba(0,0,0,0.1) 2px, rgba(0,0,0,0.05) 2px);
}
.sentence-group.selected.has-both {
    background: linear-gradient(to top, rgba(0,0,0,0.1) 0%, rgba(0,0,0,0.1) 1px, rgba(0,0,0,0.15) 1px, rgba(0,0,0,0.15) 2px, rgba(0,0,0,0.05) 2px);
}

.group-sep { display: inline; color: transparent; font-size: 4px; user-select: none; }

/* ── 典籍搜索下拉 ── */
.browse-dropdown {
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    z-index: 100;
    background: var(--bg);
    border: 1px solid var(--border);
    border-top: none;
    border-radius: 0 0 var(--radius) var(--radius);
    max-height: 320px;
    overflow-y: auto;
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
}

.browse-item {
    padding: 10px 14px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    border-bottom: 1px solid var(--border-light);
    transition: background var(--transition);
}

.browse-item:last-child { border-bottom: none; }
.browse-item:hover { background: var(--bg-alt); }
.browse-item .browse-title { font-weight: 600; color: var(--text); flex-shrink: 0; }
.browse-item .browse-meta { color: var(--text-2); font-size: 12px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.browse-item .browse-cat { margin-left: auto; flex-shrink: 0; }

/* ── 卷选择 ── */
.juan-selector-header { padding: 8px 12px; font-size: 13px; font-weight: 600; color: #555; border-bottom: 1px solid var(--border-light); background: var(--bg-alt); }
.juan-selector-grid { display: flex; flex-wrap: wrap; gap: 4px; padding: 8px 12px; max-height: 200px; overflow-y: auto; }

.juan-btn {
    border: 1px solid var(--border);
    background: var(--bg);
    border-radius: 6px;
    padding: 3px 10px;
    font-size: 12px;
    cursor: pointer;
    transition: all var(--transition);
    color: #555;
}

.juan-btn:hover { background: var(--bg-alt); border-color: #ccc; }
.juan-btn-all { background: var(--text); border-color: var(--text); color: #fff; font-weight: 600; }
.juan-btn-all:hover { opacity: 0.8; }

.load-info { margin-top: 4px; padding: 4px 0; }

/* ── 限定范围弹窗 ── */
#restrictModal .modal-content {
    font-family: 'LXGW WenKai TC', serif;
    border: none;
    border-radius: 12px;
    box-shadow: 0 12px 40px rgba(0,0,0,0.15);
}

#restrictModal .modal-header {
    border-bottom: 1px solid var(--border);
    padding: 14px 20px;
}

#restrictModal .modal-title {
    font-family: 'LXGW WenKai TC', serif;
    font-size: 15px;
    font-weight: 400;
    letter-spacing: 1px;
}

#restrictModal .modal-footer {
    border-top: 1px solid var(--border);
    padding: 12px 20px;
}

#restrictModal .modal-footer .btn {
    font-family: 'LXGW WenKai TC', serif;
    border-radius: 8px;
    font-size: 13px;
    letter-spacing: 1px;
}

#restrictModal .modal-footer .btn-primary {
    background: var(--text);
    border-color: var(--text);
}

#restrictModal .modal-footer .btn-secondary {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-2);
}

#restrictModal .nav-tabs {
    border-bottom: none;
    gap: 2px;
}

#restrictModal .nav-tabs .nav-link {
    font-family: 'LXGW WenKai TC', serif;
    font-size: 13px;
    border: none;
    border-radius: 8px;
    color: var(--text-2);
    padding: 6px 16px;
    transition: all var(--transition);
}

#restrictModal .nav-tabs .nav-link:hover {
    color: var(--text);
    background: rgba(0,0,0,0.04);
}

#restrictModal .nav-tabs .nav-link.active {
    background: var(--text);
    color: #fff;
}

#restrictModal .form-control {
    font-family: 'LXGW WenKai TC', serif;
    border-radius: 8px;
    border-color: var(--border);
    font-size: 14px;
    padding: 10px 14px;
}

#restrictModal .form-control:focus {
    border-color: #aaa;
    box-shadow: none;
}

#restrictModal .modal-body { max-height: 70vh; }
#restrictActiveBtn { font-size: 12px; font-family: 'LXGW WenKai TC', serif; }

/* ── 设置弹窗 ── */
#settingsModal .modal-content {
    font-family: 'LXGW WenKai TC', serif;
    border: none;
    border-radius: 12px;
    box-shadow: 0 12px 40px rgba(0,0,0,0.15);
}

#settingsModal .modal-header {
    border-bottom: 1px solid var(--border);
    padding: 14px 20px;
}

#settingsModal .modal-title {
    font-family: 'LXGW WenKai TC', serif;
    font-size: 15px;
    font-weight: 400;
    letter-spacing: 1px;
}

#settingsModal .modal-body {
    padding: 20px;
}

#settingsModal .filter-select-sm {
    font-family: 'LXGW WenKai TC', serif;
}

.catalog-group { margin-bottom: 2px; }
.catalog-group-header { font-family: 'LXGW WenKai TC', serif; padding: 6px 8px; cursor: pointer; border-radius: 6px; font-size: 14px; transition: background var(--transition); display: flex; align-items: center; gap: 6px; }
.catalog-group-header:hover { background: var(--bg-alt); }
.catalog-chevron, .catalog-chevron-sm { font-size: 11px; color: var(--text-3); flex-shrink: 0; transition: transform 0.15s; }
.catalog-group-body { padding-left: 12px; }
.catalog-sub-group { margin-bottom: 1px; }
.catalog-sub-header { font-family: 'LXGW WenKai TC', serif; padding: 4px 8px; cursor: pointer; border-radius: 6px; font-size: 13px; color: #555; display: flex; align-items: center; gap: 5px; transition: background var(--transition); }
.catalog-sub-header:hover { background: var(--bg-alt); }
.catalog-sub-body { padding-left: 16px; }
.catalog-text-item { padding: 5px 10px; cursor: pointer; border-radius: 6px; font-size: 13px; display: flex; align-items: center; gap: 8px; transition: background var(--transition); border-bottom: 1px solid var(--border-light); }
.catalog-text-item:last-child { border-bottom: none; }
.catalog-text-item:hover { background: var(--bg-alt); }
.catalog-text-title { font-family: 'LXGW WenKai TC', serif; font-weight: 600; color: var(--text); flex-shrink: 0; }
.catalog-text-meta { color: var(--text-2); font-size: 12px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* 已选标签 */
.restrict-tag {
    font-family: 'LXGW WenKai TC', serif;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    border-radius: 14px;
    font-size: 12px;
    font-weight: 400;
    margin: 2px 4px 2px 0;
    background: #f0f0f0;
    color: #555;
    border: 1px solid var(--border);
}

.restrict-tag.cbeta { background: #f0f0f0; color: #555; border-color: #ddd; }
.restrict-tag.classics { background: #f0f0f0; color: #555; border-color: #ddd; }

.restrict-tag-remove { cursor: pointer; font-size: 14px; line-height: 1; opacity: 0.5; }
.restrict-tag-remove:hover { opacity: 1; }

.catalog-text-item .form-check-input { margin: 0; width: 15px; height: 15px; cursor: pointer; accent-color: #333; }

/* ── 按钮统一 ── */
.btn-outline-secondary {
    font-family: 'LXGW WenKai TC', serif;
    border-color: var(--border);
    color: var(--text-2);
    border-radius: 6px;
    font-size: 12px;
    transition: all var(--transition);
}

.btn-outline-secondary:hover {
    background: var(--bg-alt);
    border-color: #ccc;
    color: var(--text);
}

.btn-outline-secondary.active {
    background: var(--text);
    border-color: var(--text);
    color: #fff;
}

#granularityBtns .btn { font-size: 12px; padding: 4px 12px; }

/* ── 滚动条 ── */
.panel-body::-webkit-scrollbar { width: 4px; }
.panel-body::-webkit-scrollbar-track { background: transparent; }
.panel-body::-webkit-scrollbar-thumb { background: #ddd; border-radius: 2px; }
.panel-body::-webkit-scrollbar-thumb:hover { background: #bbb; }

/* ── 平板端（600-1024px）── */
@media (max-width: 1024px) {
    .left-panel { width: 38%; }
    .right-panel { width: 62%; }
    .panel-body { padding: 20px; }
    .result-card { padding: 14px 16px; }
    .cluster-header { padding: 10px 14px; }
}

/* ── 移动端（<768px）── */
@media (max-width: 768px) {
    .main-container { flex-direction: column; height: auto; overflow: auto; }
    .left-panel, .right-panel { width: 100%; height: auto; }
    .left-panel { border-right: none; border-bottom: 1px solid var(--border); }
    body { overflow: auto; height: auto; }

    .panel-body { padding: 16px; }
    .left-panel .panel-body { padding-top: 16px; }

    /* 标题栏紧凑 */
    .app-header { padding: 0 12px; }
    .app-header .app-subtitle { display: none; }

    /* Tab 可滚动 */
    #corpusTabs { overflow-x: auto; flex-wrap: nowrap; -webkit-overflow-scrolling: touch; }
    #corpusTabs .nav-item { flex-shrink: 0; }
    .nav-tabs-sm .nav-link { padding: 6px 12px; font-size: 12px; }

    /* 工具栏换行 */
    #filterBar { flex-wrap: wrap; }

    /* 结果卡片全宽 */
    .result-card { padding: 12px 14px; }
    .result-card .result-meta { font-size: 11px; }

    /* 输入区 */
    #inputText { font-size: 15px; padding: 12px 14px; }
    #analyzeBtn { padding: 14px 0; font-size: 15px; }

    /* 设置弹窗全屏 */
    #settingsModal .modal-dialog { margin: 0; max-width: 100%; }
    #restrictModal .modal-dialog { margin: 0; max-width: 100%; height: 100vh; }
    #restrictModal .modal-content { border-radius: 0; height: 100%; }

    /* 空状态 */
    .empty-hint { padding-top: 80px; }
}

/* ── 小屏手机（<480px）── */
@media (max-width: 480px) {
    .splash-title { font-size: 32px; letter-spacing: 8px; }
    .splash-sub { font-size: 11px; letter-spacing: 4px; }

    .app-header .app-title { font-size: 15px; letter-spacing: 3px; }

    .panel-body { padding: 12px; }
    #inputText { rows: 5; font-size: 14px; }

    .sentence-list { font-size: 14px; line-height: 2.0; }
    .result-card .result-text { font-size: 14px; }
    .result-card .result-context { font-size: 13px; }

    /* 粒度按钮紧凑 */
    #granularityBtns .btn { font-size: 11px; padding: 4px 8px; }

    /* 典籍搜索下拉全宽 */
    .browse-dropdown { max-height: 60vh; }
}

/* ── 触摸友好：所有交互元素最小 44px ── */
@media (pointer: coarse) {
    .nav-tabs-sm .nav-link { min-height: 44px; display: flex; align-items: center; }
    .btn, button { min-height: 44px; }
    .browse-item { min-height: 48px; }
    .catalog-text-item { min-height: 44px; }
    .juan-btn { min-height: 40px; min-width: 40px; }
    .sentence-group { padding: 4px 0; }
    .btn-copy { min-width: 44px; min-height: 44px; display: flex; align-items: center; justify-content: center; }
}