/* ----------------------------------------------------
   初中物理提分宝典 - 视觉排版与动画样式系统
   ---------------------------------------------------- */

/* ================= 1. 基础配置与设计系统 ================= */
:root {
    /* 字体族定义 */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-heading: 'Outfit', 'Noto Sans SC', sans-serif;
    
    /* 统一过渡时间 */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

/* --- 深色模式主题变量 (默认) --- */
.theme-dark {
    --bg-app: linear-gradient(135deg, #090d16 0%, #111827 100%);
    --bg-body: #090d16;
    --bg-card: rgba(22, 30, 49, 0.65);
    --bg-card-hover: rgba(30, 41, 67, 0.85);
    --bg-header: rgba(13, 20, 35, 0.75);
    --bg-sidebar: rgba(13, 20, 35, 0.6);
    --bg-input: rgba(17, 24, 39, 0.8);
    --bg-pill: rgba(255, 255, 255, 0.06);
    --bg-pill-active: rgba(255, 255, 255, 0.15);
    
    --border-color: rgba(255, 255, 255, 0.08);
    --border-color-focus: rgba(168, 85, 247, 0.6);
    
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    --accent-gradient: linear-gradient(135deg, #c084fc 0%, #60a5fa 100%);
    --accent-color: #a855f7;
    --accent-secondary: #3b82f6;
    --accent-glow: rgba(168, 85, 247, 0.15);
    
    --card-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
    --card-shadow-hover: 0 20px 40px 0 rgba(168, 85, 247, 0.12);
    
    --math-box-bg: rgba(10, 15, 26, 0.8);
    --calculator-result-bg: rgba(168, 85, 247, 0.08);
}

/* --- 浅色模式主题变量 --- */
.theme-light {
    --bg-app: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    --bg-body: #f8fafc;
    --bg-card: rgba(255, 255, 255, 0.8);
    --bg-card-hover: rgba(255, 255, 255, 0.95);
    --bg-header: rgba(255, 255, 255, 0.8);
    --bg-sidebar: rgba(241, 245, 249, 0.7);
    --bg-input: #ffffff;
    --bg-pill: #e2e8f0;
    --bg-pill-active: #ffffff;
    
    --border-color: rgba(0, 0, 0, 0.08);
    --border-color-focus: rgba(99, 102, 241, 0.6);
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    
    --accent-gradient: linear-gradient(135deg, #7c3aed 0%, #2563eb 100%);
    --accent-color: #7c3aed;
    --accent-secondary: #2563eb;
    --accent-glow: rgba(124, 58, 237, 0.08);
    
    --card-shadow: 0 8px 30px rgba(0, 0, 0, 0.04);
    --card-shadow-hover: 0 20px 40px rgba(124, 58, 237, 0.08);
    
    --math-box-bg: #f1f5f9;
    --calculator-result-bg: rgba(124, 58, 237, 0.05);
}

/* ================= 2. 全局基础排版 ================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-primary);
    background-color: var(--bg-body);
    background-image: var(--bg-app);
    background-attachment: fixed;
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal);
    line-height: 1.6;
}

/* 隐藏滚动条但保留滚动 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ================= 3. 头部导航栏 (Glassmorphic) ================= */
.app-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 70px;
    background: var(--bg-header);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    z-index: 1000;
    transition: background var(--transition-normal), border var(--transition-normal);
}

.header-logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 20px;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.logo-text span {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* 全局搜索框 */
.search-container {
    flex: 0 1 420px;
}

.search-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.search-wrapper input {
    width: 100%;
    height: 40px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 0 40px 0 44px;
    font-family: var(--font-primary);
    color: var(--text-primary);
    font-size: 14px;
    transition: all var(--transition-normal);
}

.search-wrapper input:focus {
    outline: none;
    border-color: var(--border-color-focus);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.search-icon {
    position: absolute;
    left: 16px;
    color: var(--text-secondary);
    pointer-events: none;
}

.clear-search {
    position: absolute;
    right: 16px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 2px;
    border-radius: 50%;
}
.clear-search:hover {
    background: var(--bg-pill);
    color: var(--text-primary);
}

/* 头部操作栏 */
.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.view-switcher {
    display: flex;
    background: var(--bg-pill);
    padding: 4px;
    border-radius: 24px;
    border: 1px solid var(--border-color);
}

.switch-btn {
    background: transparent;
    border: none;
    font-family: var(--font-primary);
    font-weight: 500;
    font-size: 13px;
    color: var(--text-secondary);
    padding: 6px 16px;
    border-radius: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all var(--transition-fast);
}

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

.switch-btn.active {
    background: var(--bg-pill-active);
    color: var(--text-primary);
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.action-icon-btn {
    background: var(--bg-pill);
    border: 1px solid var(--border-color);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.action-icon-btn:hover {
    background: var(--bg-pill-active);
    transform: translateY(-2px);
}

/* 控制深色模式的日/月图标交替显示 */
.theme-dark .sun-icon { display: block; }
.theme-dark .moon-icon { display: none; }
.theme-light .sun-icon { display: none; }
.theme-light .moon-icon { display: block; }

/* ================= 4. 双栏布局结构 ================= */
.app-container {
    display: flex;
    margin-top: 70px;
    min-height: calc(100vh - 70px);
}

/* 侧边栏 */
.app-sidebar {
    width: 280px;
    background: var(--bg-sidebar);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-right: 1px solid var(--border-color);
    padding: 24px;
    position: fixed;
    top: 70px;
    bottom: 0;
    left: 0;
    overflow-y: auto;
    z-index: 90;
    transition: background var(--transition-normal), border var(--transition-normal);
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.nav-section-title {
    font-family: var(--font-heading);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text-muted);
    font-weight: 700;
    margin-bottom: 12px;
}

.nav-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-bottom: 30px;
}

.nav-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.nav-item:hover {
    background: var(--bg-pill);
    color: var(--text-primary);
}

.nav-item.active {
    background: var(--bg-pill-active);
    color: var(--text-primary);
    font-weight: 600;
    border-left: 3px solid var(--accent-color);
}

.nav-icon {
    font-size: 16px;
    margin-right: 10px;
}

.badge {
    background: var(--bg-pill);
    font-family: 'Outfit', sans-serif;
    font-size: 11px;
    padding: 2px 8px;
    border-radius: 10px;
    color: var(--text-muted);
}

.nav-item.active .badge {
    background: var(--accent-color);
    color: white;
}

/* 侧边栏打印盒 */
.print-quick-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 16px;
    margin-top: auto;
}

.quick-card-title {
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 6px;
}

.quick-card-desc {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 14px;
    line-height: 1.4;
}

.print-mode-selector {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 14px;
}

.radio-label {
    display: flex;
    align-items: center;
    font-size: 12px;
    cursor: pointer;
    color: var(--text-secondary);
    gap: 8px;
}

.radio-label input {
    display: none;
}

.custom-radio {
    width: 14px;
    height: 14px;
    border: 1.5px solid var(--text-muted);
    border-radius: 50%;
    display: inline-block;
    position: relative;
    transition: all var(--transition-fast);
}

.radio-label input:checked + .custom-radio {
    border-color: var(--accent-color);
}

.radio-label input:checked + .custom-radio::after {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--accent-gradient);
    border-radius: 50%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.premium-btn {
    width: 100%;
    background: var(--accent-gradient);
    border: none;
    color: white;
    font-family: var(--font-primary);
    font-weight: 600;
    font-size: 13px;
    padding: 10px;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    box-shadow: 0 4px 12px rgba(168, 85, 247, 0.25);
    transition: all var(--transition-fast);
}

.premium-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(168, 85, 247, 0.4);
}

.premium-btn.primary {
    background: var(--accent-gradient);
}

/* 主内容区 */
.app-main-content {
    flex: 1;
    margin-left: 280px;
    padding: 32px;
    min-width: 0;
}

/* SPA Section Toggler */
.content-section {
    display: none;
}

.content-section.active {
    display: block;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 28px;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 22px;
    font-weight: 800;
    letter-spacing: -0.5px;
    margin-bottom: 4px;
}

.section-subtitle {
    font-size: 13px;
    color: var(--text-secondary);
}

.card-count-indicator {
    font-size: 12px;
    color: var(--text-muted);
    background: var(--bg-pill);
    padding: 4px 10px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

/* ================= 5. 交互式物理公式卡片流 ================= */
.formulas-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
    gap: 24px;
}

.formula-card {
    background: var(--bg-card);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--card-shadow);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal), border var(--transition-normal), background var(--transition-normal);
}

.formula-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--card-shadow-hover);
    border-color: var(--border-color-focus);
    background: var(--bg-card-hover);
}

/* 卡片头部 */
.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-title {
    font-family: var(--font-heading);
    font-size: 16px;
    font-weight: 700;
}

.category-tag {
    font-size: 10px;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 10px;
    text-transform: uppercase;
}

.tag-mechanics { background: rgba(59, 130, 246, 0.12); color: #60a5fa; border: 0.5px solid rgba(59, 130, 246, 0.3); }
.tag-electricity { background: rgba(234, 179, 8, 0.12); color: #facc15; border: 0.5px solid rgba(234, 179, 8, 0.3); }
.tag-thermodynamics { background: rgba(239, 68, 68, 0.12); color: #f87171; border: 0.5px solid rgba(239, 68, 68, 0.3); }
.tag-acoustics-optics { background: rgba(168, 85, 247, 0.12); color: #c084fc; border: 0.5px solid rgba(168, 85, 247, 0.3); }

/* LaTeX 公式展示区 */
.formula-display-box {
    background: var(--math-box-bg);
    padding: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    border-bottom: 1px solid var(--border-color);
    min-height: 70px;
}

/* 卡片内部 Tab 导航 */
.card-tabs-nav {
    display: flex;
    background: var(--bg-pill);
    border-bottom: 1px solid var(--border-color);
}

.tab-nav-btn {
    flex: 1;
    background: transparent;
    border: none;
    font-family: var(--font-primary);
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
    padding: 10px 0;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.tab-nav-btn:hover {
    color: var(--text-primary);
    background: rgba(255,255,255,0.02);
}

.tab-nav-btn.active {
    color: var(--accent-color);
    font-weight: 600;
    background: var(--bg-card);
    box-shadow: inset 0 -2px 0 var(--accent-color);
}

/* Tab 视图内容区 */
.card-tab-content {
    padding: 18px 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
    animation: fadeIn var(--transition-normal);
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Tab 1: 定义与变量列表 */
.definition-text {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 14px;
}

.variables-title {
    font-size: 11px;
    font-weight: 700;
    color: var(--text-muted);
    letter-spacing: 0.5px;
    text-transform: uppercase;
    margin-bottom: 8px;
}

.variables-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.variable-row {
    display: flex;
    align-items: center;
    font-size: 12px;
    border-bottom: 0.5px dashed var(--border-color);
    padding-bottom: 6px;
}
.variable-row:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.var-symbol {
    flex: 0 0 45px;
    font-weight: 600;
    color: var(--accent-color);
    font-family: var(--font-heading);
}

.var-name {
    flex: 1;
    color: var(--text-primary);
}

.var-unit {
    color: var(--text-muted);
    font-family: 'Outfit', sans-serif;
    font-size: 11px;
    background: var(--bg-pill);
    padding: 1px 6px;
    border-radius: 4px;
}

/* Tab 2: 公式变形列表 */
.transformations-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.trans-item {
    background: var(--math-box-bg);
    border-radius: var(--radius-md);
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.trans-eq {
    font-size: 16px;
}

.trans-desc {
    font-size: 12px;
    color: var(--text-secondary);
    text-align: right;
}

/* Tab 3: 单位换算与交互计算器 */
.calc-inputs-container {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 12px;
}

.calc-input-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.calc-input-row .symbol {
    flex: 0 0 35px;
    font-weight: 600;
    font-size: 14px;
    color: var(--accent-color);
    font-family: var(--font-heading);
}

.calc-input-row input {
    flex: 1;
    height: 34px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 0 10px;
    font-family: 'Outfit', var(--font-primary);
    color: var(--text-primary);
    font-size: 13px;
    transition: all var(--transition-fast);
}

.calc-input-row input:focus {
    outline: none;
    border-color: var(--border-color-focus);
}

.calc-input-row select {
    flex: 0 0 100px;
    height: 34px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    padding: 0 6px;
    font-size: 12px;
    font-family: var(--font-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.calc-input-row select:focus {
    outline: none;
    border-color: var(--border-color-focus);
}

.calc-actions {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
}

.calc-btn {
    flex: 2;
    height: 34px;
    background: var(--accent-gradient);
    border: none;
    color: white;
    font-weight: 600;
    font-size: 12px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    transition: all var(--transition-fast);
}
.calc-btn:hover {
    opacity: 0.9;
}

.reset-btn {
    flex: 1;
    height: 34px;
    background: var(--bg-pill);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 12px;
    font-weight: 500;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}
.reset-btn:hover {
    background: var(--bg-pill-active);
}

.calc-result-box {
    background: var(--calculator-result-bg);
    border: 1px dashed var(--border-color-focus);
    border-radius: var(--radius-md);
    padding: 10px 14px;
    display: none;
    flex-direction: column;
    gap: 4px;
}

.calc-result-box.active {
    display: flex;
    animation: fadeIn var(--transition-normal);
}

.result-title {
    font-size: 11px;
    font-weight: 700;
    color: var(--accent-color);
    text-transform: uppercase;
}

.result-step {
    font-size: 13px;
    word-break: break-all;
}

/* Tab 4: 典型例题 */
.example-box {
    display: flex;
    flex-direction: column;
}

.example-question {
    font-size: 13px;
    font-weight: 500;
    line-height: 1.5;
    margin-bottom: 12px;
}

.view-solution-btn {
    background: var(--bg-pill);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 8px 12px;
    border-radius: var(--radius-md);
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    transition: all var(--transition-fast);
}

.view-solution-btn:hover {
    background: var(--bg-pill-active);
    color: var(--text-primary);
}

.solution-container {
    display: none;
    margin-top: 14px;
    background: var(--math-box-bg);
    border-radius: var(--radius-md);
    padding: 14px;
    border: 1px solid var(--border-color);
}

.solution-container.active {
    display: block;
    animation: fadeIn var(--transition-normal);
}

.solution-steps {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
    font-size: 12px;
    line-height: 1.6;
}

/* ================= 6. 专项习题集排版 (模拟试卷系统) ================= */
.practice-control-header {
    background: var(--bg-card);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px 24px;
    margin-bottom: 30px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.title-wrap {
    display: flex;
    flex-direction: column;
}

.practice-action-bar {
    display: flex;
    align-items: center;
    gap: 20px;
}

.print-mode-panel {
    display: flex;
    align-items: center;
    gap: 10px;
}

.panel-label {
    font-size: 12px;
    color: var(--text-secondary);
}

.toggle-group {
    background: var(--bg-pill);
    padding: 3px;
    border-radius: 8px;
    display: flex;
    border: 1px solid var(--border-color);
}

.toggle-option {
    background: transparent;
    border: none;
    font-family: var(--font-primary);
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
    padding: 6px 14px;
    border-radius: 6px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.toggle-option.active {
    background: var(--bg-pill-active);
    color: var(--text-primary);
    box-shadow: 0 1px 4px rgba(0,0,0,0.1);
}

/* 试卷容器 A4 标准视觉 */
.exam-sheet-container {
    background: var(--bg-card);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--card-shadow);
    padding: 40px 50px;
    transition: all var(--transition-normal);
}

/* 试卷头部块 */
.exam-header-block {
    text-align: center;
    border-bottom: 2px solid var(--text-primary);
    padding-bottom: 20px;
    margin-bottom: 28px;
}

.exam-main-title {
    font-family: var(--font-heading);
    font-size: 26px;
    font-weight: 900;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.exam-meta-info {
    display: flex;
    justify-content: center;
    gap: 24px;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.exam-meta-info strong {
    color: var(--text-primary);
}

.student-info-fields {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 16px 24px;
    font-size: 13px;
    color: var(--text-secondary);
}

/* 题目流 */
.exercises-list {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.question-card {
    border-bottom: 1px dashed var(--border-color);
    padding-bottom: 24px;
}

.question-card:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.question-title-row {
    font-size: 14px;
    font-weight: 600;
    line-height: 1.7;
    margin-bottom: 14px;
}

.score-badge {
    color: var(--accent-color);
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
}

/* 答题留白区域 (仅在学生模式下显示) */
.student-space {
    display: none;
    margin-top: 14px;
}

.student-space.active {
    display: block;
}

/* 计算题答题留白框 */
.calculation-space {
    border: 1px dashed var(--text-muted);
    border-radius: var(--radius-md);
    height: 160px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 12px;
    background: rgba(255, 255, 255, 0.01);
}

/* 网页上习题的答案解析框 */
.exam-solution-block {
    display: none;
    margin-top: 16px;
    background: var(--math-box-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px 20px;
}

.exam-solution-block.active {
    display: block;
    animation: fadeIn var(--transition-normal);
}

.ans-title {
    font-size: 12px;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: 8px;
}

.ans-text {
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 10px;
}

/* ================= 7. 悬浮/覆盖层与其他视觉元素 ================= */
.floating-print-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--accent-gradient);
    border: none;
    color: white;
    cursor: pointer;
    box-shadow: 0 6px 20px rgba(168, 85, 247, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 999;
    transition: all var(--transition-fast);
}

.floating-print-btn:hover {
    transform: scale(1.08) translateY(-2px);
    box-shadow: 0 8px 24px rgba(168, 85, 247, 0.5);
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10, 15, 26, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 10000;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    transition: opacity var(--transition-normal);
}

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

.spinner {
    width: 50px;
    height: 50px;
    border: 4px dashed var(--accent-color);
    border-top: 4px solid transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-text {
    color: white;
    font-size: 14px;
    font-weight: 500;
}

/* ================= 8. 响应式布局媒体查询 ================= */
@media (max-width: 1024px) {
    .app-sidebar {
        display: none; /* 移动端隐藏侧边栏，可通过按钮或后续交互展开 */
    }
    .app-main-content {
        margin-left: 0;
        padding: 20px;
    }
    .formulas-grid {
        grid-template-columns: 1fr;
    }
    .search-container {
        flex: 0 1 200px;
    }
}

@media (max-width: 768px) {
    .app-header {
        padding: 0 12px;
        height: 60px;
    }
    .app-container {
        margin-top: 60px;
    }
    .logo-text {
        font-size: 16px;
    }
    .search-container {
        display: none; /* 移动端隐藏搜索栏以节省空间 */
    }
    .view-switcher {
        padding: 2px;
    }
    .switch-btn {
        padding: 4px 10px;
        font-size: 12px;
    }
    .floating-print-btn {
        bottom: 20px;
        right: 20px;
        width: 48px;
        height: 48px;
    }
    .practice-control-header {
        flex-direction: column;
        align-items: stretch;
        gap: 16px;
    }
    .practice-action-bar {
        flex-direction: column;
        align-items: stretch;
    }
    .print-mode-panel {
        justify-content: space-between;
    }
    .exam-sheet-container {
        padding: 20px;
    }
    .exam-main-title {
        font-size: 20px;
    }
}

/* ================= 9. @media print 打印机与 A4 PDF 导出排版样式 ================= */
@media print {
    /* 1. 基础重置：纯白底色、纯黑文字，去除阴影 */
    body {
        background: #ffffff !important;
        background-image: none !important;
        color: #000000 !important;
        font-size: 10.5pt !important;
        line-height: 1.5 !important;
    }
    
    /* 2. 隐藏所有的非打印组件 */
    .no-print,
    header,
    aside,
    .card-tabs-nav,
    .calc-actions,
    .calc-inputs-container,
    .view-solution-btn,
    .clear-search,
    .floating-print-btn,
    .loading-overlay {
        display: none !important;
    }
    
    /* 3. 伸缩主内容容器，消除外边距 */
    .app-container {
        margin-top: 0 !important;
        display: block !important;
    }
    
    .app-main-content {
        margin-left: 0 !important;
        padding: 0 !important;
        width: 100% !important;
    }
    
    /* 4. 纸张页面及页边距设置 (标准 A4 纵向) */
    @page {
        size: A4 portrait;
        margin: 18mm 15mm 20mm 15mm;
    }
    
    /* 5. 公式手册打印视图优化 */
    #handbookSection.active {
        display: block !important;
    }
    
    /* 打印公式手册时，将卡片网格重置为单列排列 */
    .formulas-grid {
        display: flex !important;
        flex-direction: column !important;
        gap: 20px !important;
    }
    
    .formula-card {
        background: #ffffff !important;
        border: 1px solid #000000 !important;
        box-shadow: none !important;
        page-break-inside: avoid !important; /* 避免在卡片中间被截断跨页 */
        transform: none !important;
        border-radius: 8px !important;
        display: block !important;
    }
    
    .card-header {
        border-bottom: 1px solid #000000 !important;
        padding: 10px 15px !important;
    }
    
    .card-title {
        color: #000000 !important;
        font-size: 14pt !important;
    }
    
    .category-tag {
        border: 1px solid #000000 !important;
        color: #000000 !important;
        background: transparent !important;
    }
    
    .formula-display-box {
        background: #f8f9fa !important;
        border-bottom: 1px solid #000000 !important;
        padding: 15px !important;
        font-size: 20px !important;
    }
    
    /* 在打印视图下，直接展示卡片的全部有用 Tab 内容，不用标签按钮切换！ */
    .card-tab-content {
        padding: 12px 15px !important;
        display: block !important;
    }
    
    /* 显示必要的 Tab */
    .tab-pane {
        display: block !important;
        margin-bottom: 16px !important;
        opacity: 1 !important;
        transform: none !important;
    }
    
    /* 隐藏计算器 Tab 的输入框 */
    .tab-pane:nth-child(3) {
        display: none !important; /* 隐藏计算器界面，计算器无打印价值 */
    }
    
    /* 给打印排版添加标签前缀，显得像公式百科 */
    .tab-pane:nth-child(1)::before {
        content: "【核心定义与物理量】";
        font-weight: bold;
        font-size: 11pt;
        display: block;
        margin-bottom: 6px;
    }

    .tab-pane:nth-child(2)::before {
        content: "【公式变形推导】";
        font-weight: bold;
        font-size: 11pt;
        display: block;
        margin-bottom: 6px;
    }
    
    .tab-pane:nth-child(4)::before {
        content: "【典型例题解析】";
        font-weight: bold;
        font-size: 11pt;
        display: block;
        margin-bottom: 6px;
    }

    .definition-text {
        color: #000000 !important;
        font-size: 10pt !important;
    }
    
    .variable-row {
        border-bottom: 0.5px dashed #000000 !important;
        color: #000000 !important;
    }
    
    .var-symbol {
        color: #000000 !important;
    }
    
    .var-unit {
        border: 1.5px solid #000000 !important;
        background: transparent !important;
        color: #000000 !important;
    }
    
    .trans-item {
        background: #f8f9fa !important;
        border: 0.5px solid #000000 !important;
        color: #000000 !important;
    }
    
    .example-question {
        font-size: 10pt !important;
    }
    
    .solution-container {
        display: block !important;
        background: #f8f9fa !important;
        border: 0.5px solid #000000 !important;
        padding: 10px !important;
    }
    
    /* 6. 专项习题集打印视图优化 */
    #practiceSection.active {
        display: block !important;
    }
    
    .exam-sheet-container {
        background: #ffffff !important;
        border: none !important;
        box-shadow: none !important;
        padding: 0 !important;
        width: 100% !important;
    }
    
    .exam-header-block {
        border-bottom: 3px double #000000 !important;
        margin-bottom: 30px !important;
    }
    
    .exam-main-title {
        color: #000000 !important;
        font-size: 20pt !important;
    }
    
    .exam-meta-info,
    .student-info-fields {
        color: #000000 !important;
        font-size: 10pt !important;
    }
    
    .question-card {
        page-break-inside: avoid !important; /* 避免题目中间跨页截断 */
        border-bottom: 1.5px solid #000000 !important;
        padding-bottom: 20px !important;
        margin-bottom: 20px !important;
    }
    
    .question-title-row {
        font-size: 11pt !important;
    }
    
    /* 在打印视图下，基于当前的“打印设置”控制解析的显示或隐藏 */
    /* 教师版：完全渲染解析 */
    body.print-teacher-mode .exam-solution-block {
        display: block !important;
        background: #f8f9fa !important;
        border: 1px solid #000000 !important;
        padding: 12px !important;
        margin-top: 15px !important;
        page-break-inside: avoid !important;
    }
    
    /* 教师版：隐藏答题留白 */
    body.print-teacher-mode .student-space {
        display: none !important;
    }
    
    /* 学生版：隐藏解析 */
    body.print-student-mode .exam-solution-block {
        display: none !important;
    }
    
    /* 学生版：展示答题留白与线段 */
    body.print-student-mode .student-space {
        display: block !important;
    }
    
    /* 给学生版在纸张上提供标准的做题格子/横线 */
    body.print-student-mode .calculation-space {
        background: transparent !important;
        border: 1.5px dashed #000000 !important;
        height: 180px !important;
        color: #888888 !important;
    }
    
    /* 答题线表示：如果是填空题留空，画出一条粗黑下划线 */
    .print-fill-blank {
        text-decoration: underline !important;
        font-weight: bold;
    }
}

/* ==========================================================================
   初中数学扩展特定样式 & 学科滑块切换组件
   ========================================================================== */

.subject-portal-switcher {
    display: flex;
    background: var(--bg-pill);
    padding: 3px 4px;
    border-radius: 24px;
    border: 1px solid var(--border-color);
    margin-left: 20px;
}

.subject-tab {
    background: transparent;
    border: none;
    font-family: var(--font-primary);
    font-weight: 700;
    font-size: 13px;
    color: var(--text-secondary);
    padding: 6px 14px;
    border-radius: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all var(--transition-fast);
}

.subject-tab:hover {
    color: var(--text-primary);
}

.subject-tab.active {
    background: var(--accent-gradient);
    color: white !important;
    box-shadow: 0 4px 12px rgba(168, 85, 247, 0.25);
}

/* 均值方差计算器的自定义列表输入样式 */
.variance-calc-container {
    display: flex;
    flex-direction: column;
    width: 100%;
}

.variance-input-desc {
    font-size: 11px;
    color: var(--text-muted);
    margin-bottom: 8px;
    line-height: 1.4;
}

.variance-input-field {
    width: 100%;
    height: 36px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 0 12px;
    color: var(--text-primary);
    font-size: 13px;
    font-family: 'Outfit', var(--font-primary);
    margin-bottom: 12px;
    transition: border var(--transition-fast);
}

.variance-input-field:focus {
    outline: none;
    border-color: var(--border-color-focus);
}

/* ====================================================
   7.3 新增：“数理动画推导实验室”高奢玻璃态动画模态框样式
   ==================================================== */

.animation-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(5, 7, 12, 0.7);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2500;
    opacity: 1;
    transition: opacity var(--transition-normal);
}

.animation-modal.hidden {
    display: none !important;
    opacity: 0;
    pointer-events: none;
}

.animation-modal-content {
    background: rgba(22, 30, 49, 0.75);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-xl);
    width: 90%;
    max-width: 800px;
    padding: 32px;
    box-shadow: 0 24px 64px rgba(0, 0, 0, 0.4), 
                0 0 40px rgba(168, 85, 247, 0.15);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    animation: animModalScale var(--transition-normal) cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes animModalScale {
    from {
        transform: scale(0.92);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

.close-modal-btn {
    position: absolute;
    top: 20px;
    right: 20px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--text-secondary);
    font-size: 24px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    z-index: 10;
}

.close-modal-btn:hover {
    background: rgba(239, 68, 68, 0.2);
    border-color: rgba(239, 68, 68, 0.3);
    color: #ef4444;
    transform: rotate(90deg);
}

.anim-header {
    margin-bottom: 24px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.anim-badge {
    background: rgba(168, 85, 247, 0.12);
    border: 1px solid rgba(168, 85, 247, 0.2);
    color: #c084fc;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    width: max-content;
}

.anim-modal-title {
    font-family: var(--font-heading);
    font-size: 22px;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* --- 中央动画主展台 --- */
.anim-viewport {
    background: #060910;
    border: 1px solid rgba(255, 255, 255, 0.04);
    border-radius: var(--radius-lg);
    height: 320px;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 24px;
    margin-bottom: 20px;
}

/* 高奢漫反射背景光晕 */
.anim-glow-blob {
    position: absolute;
    width: 250px;
    height: 250px;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.15;
    z-index: 1;
    pointer-events: none;
    transition: all var(--transition-slow);
}

.anim-glow-blob.blob-1 {
    background: #a855f7;
    top: -50px;
    left: -50px;
    animation: blobFloat1 12s infinite alternate ease-in-out;
}

.anim-glow-blob.blob-2 {
    background: #3b82f6;
    bottom: -50px;
    right: -50px;
    animation: blobFloat2 12s infinite alternate ease-in-out;
}

@keyframes blobFloat1 {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(60px, 40px) scale(1.2); }
}

@keyframes blobFloat2 {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(-60px, -40px) scale(1.2); }
}

.anim-formula-container {
    z-index: 2;
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
}

.anim-formula-box {
    font-size: 32px;
    color: #ffffff;
    text-align: center;
    text-shadow: 0 0 20px rgba(255, 255, 255, 0.1);
    transform: scale(1);
    opacity: 1;
    transition: transform var(--transition-normal) cubic-bezier(0.34, 1.56, 0.64, 1), 
                opacity var(--transition-normal) ease;
}

.anim-formula-box.anim-changing {
    transform: scale(0.9);
    opacity: 0.3;
}

.anim-desc-container {
    z-index: 2;
    width: 100%;
    min-height: 70px;
    background: rgba(255, 255, 255, 0.02);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: 14px 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

.anim-step-desc {
    font-size: 14px;
    color: var(--text-primary);
    line-height: 1.6;
    text-align: center;
    max-width: 600px;
    animation: fadeInText 0.4s ease forwards;
}

@keyframes fadeInText {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- 约简划红线特效 --- */
.katex .cancel-line {
    position: relative;
    display: inline-block;
}

.katex .cancel-line::after {
    content: "";
    position: absolute;
    left: -2px;
    top: 50%;
    width: 0;
    height: 2px;
    background: #ef4444;
    transform: rotate(-30deg);
    box-shadow: 0 0 6px #ef4444;
    animation: drawCancelLine 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes drawCancelLine {
    to { width: calc(100% + 4px); }
}

/* --- 进度条与控制面板 --- */
.anim-progress-bar-container {
    background: rgba(255, 255, 255, 0.06);
    height: 4px;
    width: 100%;
    border-radius: 2px;
    margin-bottom: 20px;
    overflow: hidden;
}

.anim-progress-bar {
    background: var(--accent-gradient);
    height: 100%;
    width: 0%;
    border-radius: 2px;
    transition: width var(--transition-normal) cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 0 8px rgba(168, 85, 247, 0.5);
}

.anim-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.anim-step-indicator {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 600;
}

.anim-controls {
    display: flex;
    gap: 12px;
    align-items: center;
}

.anim-control-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all var(--transition-fast);
}

.anim-control-btn svg {
    transition: transform var(--transition-fast);
}

.anim-control-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-1px);
}

.anim-control-btn:active {
    transform: translateY(0);
}

.anim-control-btn.primary-glow {
    background: var(--accent-gradient);
    border: none;
    color: white !important;
    box-shadow: 0 4px 15px rgba(168, 85, 247, 0.35);
}

.anim-control-btn.primary-glow:hover {
    box-shadow: 0 6px 20px rgba(168, 85, 247, 0.5);
}

.anim-control-btn.reset-btn {
    background: transparent;
    border-color: transparent;
    color: var(--text-muted);
}

.anim-control-btn.reset-btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.04);
}

/* --- 卡片 Tab 页内播放按钮样式 --- */
.anim-trigger-btn {
    background: rgba(168, 85, 247, 0.08);
    border: 1px solid rgba(168, 85, 247, 0.15);
    color: #c084fc !important;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    margin-top: 14px;
    width: 100%;
    box-sizing: border-box;
    transition: all var(--transition-fast);
}

.anim-trigger-btn:hover {
    background: rgba(168, 85, 247, 0.15);
    border-color: rgba(168, 85, 247, 0.3);
    box-shadow: 0 4px 12px rgba(168, 85, 247, 0.15);
    transform: translateY(-1px);
}

.anim-trigger-btn svg {
    fill: currentColor;
}

/* ==========================================================================
   9. 数学宝典：一次与二次函数 Canvas 动态图形演示实验室高级玻璃态样式
   ========================================================================== */

/* 双列分割布局，支持响应式 */
.function-graph-split {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    align-items: flex-start;
    width: 100%;
}

.function-calc-side {
    flex: 1 1 240px;
    display: flex;
    flex-direction: column;
}

.function-graph-side {
    flex: 1 1 300px;
    display: flex;
    flex-direction: column;
}

.side-sub-title {
    font-size: 11px;
    font-weight: 700;
    color: var(--text-muted);
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 10px;
    border-left: 3px solid var(--accent-color);
    padding-left: 6px;
}

/* 矢量绘图展台大框 */
.function-graph-lab {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.theme-light .function-graph-lab {
    background: rgba(0, 0, 0, 0.01);
}

/* 绘图 Canvas 包装器：具有高端暗黑视网膜级黑色网格背景与流光外阴影 */
.graph-canvas-wrapper {
    position: relative;
    width: 100%;
    aspect-ratio: 1;
    background: #0b0f19;
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.6), 0 4px 20px rgba(0, 0, 0, 0.15);
}

.theme-light .graph-canvas-wrapper {
    background: #fdfdfd;
    border: 1px solid rgba(0, 0, 0, 0.06);
    box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.05);
}

.function-graph-canvas {
    display: block;
    width: 100%;
    height: 100%;
    cursor: crosshair;
}

/* 滑块控制器 */
.graph-controls {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.control-row {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.slider-label-area {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
}

.param-title {
    color: var(--text-secondary);
    font-weight: 500;
}

.param-val {
    font-family: 'Outfit', var(--font-primary);
    font-weight: 700;
    color: var(--accent-color);
    background: var(--bg-pill);
    padding: 2px 8px;
    border-radius: 6px;
    font-size: 11px;
}

/* 高端客制化 Range 滑动输入条 */
.graph-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--border-color);
    outline: none;
    transition: background 0.3s;
}

.graph-slider::-webkit-slider-runnable-track {
    width: 100%;
    height: 6px;
    cursor: pointer;
    background: var(--bg-pill);
    border-radius: 3px;
    border: none;
}

.graph-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent-gradient);
    cursor: pointer;
    margin-top: -5px; /* (6px - 16px)/2 */
    box-shadow: 0 0 10px var(--accent-glow), 0 2px 6px rgba(0, 0, 0, 0.3);
    transition: transform 0.1s, box-shadow 0.1s;
}

.graph-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 15px var(--accent-color), 0 2px 8px rgba(0, 0, 0, 0.4);
}

.theme-light .graph-slider::-webkit-slider-thumb {
    box-shadow: 0 0 6px var(--accent-glow), 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* 动态解析公式展示牌 */
.graph-formula-show {
    background: var(--math-box-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 8px 12px;
    text-align: center;
    font-family: 'Outfit', var(--font-primary);
    font-weight: 700;
    font-size: 15px;
    color: var(--text-primary);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    transition: all var(--transition-fast);
}

/* 中考口诀与顶点对称轴展台 */
.graph-tips-box {
    background: rgba(168, 85, 247, 0.04);
    border: 1px dashed rgba(168, 85, 247, 0.2);
    border-radius: var(--radius-md);
    padding: 10px 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.theme-light .graph-tips-box {
    background: rgba(124, 58, 237, 0.02);
    border-color: rgba(124, 58, 237, 0.15);
}

.tips-title {
    font-size: 11px;
    font-weight: 700;
    color: var(--accent-color);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.tips-content {
    font-size: 12px;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* 口诀动画特定按钮 */
.anim-graph-btn {
    background: rgba(59, 130, 246, 0.08) !important;
    border: 1px solid rgba(59, 130, 246, 0.15) !important;
    color: #60a5fa !important;
}

.anim-graph-btn:hover {
    background: rgba(59, 130, 246, 0.15) !important;
    border-color: rgba(59, 130, 246, 0.3) !important;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.15) !important;
}