/* ==========================================
   爱记文言文 - 中国风水墨主题样式
   ========================================== */

/* CSS 变量 - 设计令牌 */
:root {
    /* 主色调 */
    --color-primary: #2C5F4A;
    --color-primary-light: #3A7A5E;
    --color-primary-dark: #1E4233;
    --color-primary-bg: #E8F0EB;

    /* 强调色 */
    --color-accent: #C4704B;
    --color-accent-light: #D4885F;
    --color-accent-dark: #A85A38;
    --color-accent-bg: #FDF0EA;

    /* 辅助色 */
    --color-stone: #8B7355;
    --color-stone-light: #A6956F;
    --color-stone-bg: #F5F0E8;

    /* 中性色 */
    --color-bg: #F5F0E8;
    --color-bg-secondary: #EDE6D8;
    --color-surface: #FFFFFF;
    --color-surface-hover: #FAF8F5;
    --color-border: #E8E0D4;
    --color-border-light: #F0EBE3;

    /* 文字色 */
    --color-text: #2D2D2D;
    --color-text-secondary: #5A5A5A;
    --color-text-muted: #8A8A8A;
    --color-text-inverse: #FFFFFF;

    /* 状态色 */
    --color-success: #2C5F4A;
    --color-warning: #D4A03C;
    --color-error: #C44848;
    --color-info: #4A7FB5;

    /* 字体 */
    --font-serif: 'Noto Serif SC', 'Source Han Serif SC', 'STSong', serif;
    --font-sans: 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', sans-serif;

    /* 字号 */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;

    /* 间距 */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;

    /* 圆角 */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* 阴影 */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.1);
    --shadow-xl: 0 16px 48px rgba(0,0,0,0.12);

    /* 过渡 */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* 容器最大宽度 */
    --container-max: 480px;
    --container-wide: 768px;
}

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

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 背景纹理 - 宣纸效果 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    background-image: 
        radial-gradient(ellipse at 20% 50%, rgba(44,95,74,0.03) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(196,112,75,0.03) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 80%, rgba(139,115,85,0.02) 0%, transparent 50%);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary-light);
}

/* 容器 */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-4);
    position: relative;
    z-index: 1;
}

.container-wide {
    max-width: var(--container-wide);
}

/* 页面主内容区 */
.page-content {
    padding-bottom: calc(80px + var(--space-8));
    min-height: calc(100vh - 60px);
}

/* ==========================================
   导航栏
   ========================================== */
.nav-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 70px;
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-around;
    z-index: 100;
    box-shadow: 0 -2px 12px rgba(0,0,0,0.05);
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: var(--space-2) var(--space-3);
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: var(--text-xs);
    transition: all var(--transition-fast);
    cursor: pointer;
    position: relative;
    -webkit-tap-highlight-color: transparent;
}

.nav-item:hover {
    color: var(--color-primary);
}

.nav-item.active {
    color: var(--color-primary);
}

.nav-item.active::before {
    content: '';
    position: absolute;
    top: -1px;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 3px;
    background: var(--color-primary);
    border-radius: 0 0 3px 3px;
}

.nav-icon {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav-icon svg {
    width: 22px;
    height: 22px;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.8;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.nav-label {
    font-weight: 500;
}

/* ==========================================
   顶部栏
   ========================================== */
.top-bar {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(245, 240, 232, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border-light);
    padding: var(--space-3) var(--space-4);
}

.top-bar-inner {
    max-width: var(--container-max);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.top-bar h1 {
    font-family: var(--font-serif);
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--color-primary-dark);
    letter-spacing: 2px;
}

.top-bar-actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

/* ==========================================
   卡片组件
   ========================================== */
.card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border-light);
    transition: all var(--transition-normal);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-elevated {
    box-shadow: var(--shadow-md);
    border: none;
}

/* ==========================================
   按钮组件
   ========================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    border-radius: var(--radius-full);
    font-size: var(--text-base);
    font-weight: 600;
    font-family: var(--font-sans);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    -webkit-tap-highlight-color: transparent;
    text-decoration: none;
    line-height: 1.5;
    min-height: 44px;
}

.btn:active {
    transform: scale(0.97);
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-text-inverse);
    box-shadow: 0 4px 12px rgba(44,95,74,0.3);
}

.btn-primary:hover {
    background: var(--color-primary-light);
    box-shadow: 0 6px 16px rgba(44,95,74,0.35);
}

.btn-accent {
    background: var(--color-accent);
    color: var(--color-text-inverse);
    box-shadow: 0 4px 12px rgba(196,112,75,0.3);
}

.btn-accent:hover {
    background: var(--color-accent-light);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 1.5px solid var(--color-primary);
}

.btn-outline:hover {
    background: var(--color-primary-bg);
}

.btn-ghost {
    background: transparent;
    color: var(--color-text-secondary);
}

.btn-ghost:hover {
    background: var(--color-bg-secondary);
    color: var(--color-text);
}

.btn-sm {
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
    min-height: 36px;
}

.btn-lg {
    padding: var(--space-4) var(--space-8);
    font-size: var(--text-lg);
    min-height: 52px;
}

.btn-block {
    width: 100%;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* ==========================================
   表单组件
   ========================================== */
.form-group {
    margin-bottom: var(--space-5);
}

.form-label {
    display: block;
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-2);
}

.form-input {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--text-base);
    font-family: var(--font-sans);
    color: var(--color-text);
    background: var(--color-surface);
    transition: all var(--transition-fast);
    min-height: 44px;
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(44,95,74,0.1);
}

.form-input::placeholder {
    color: var(--color-text-muted);
}

.form-input.error {
    border-color: var(--color-error);
    box-shadow: 0 0 0 3px rgba(196,72,72,0.1);
}

.form-error {
    font-size: var(--text-xs);
    color: var(--color-error);
    margin-top: var(--space-1);
}

/* ==========================================
   进度条
   ========================================== */
.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    border-radius: var(--radius-full);
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
    transition: width var(--transition-slow);
}

.progress-bar-accent .progress-bar-fill {
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light));
}

/* ==========================================
   标签/徽章
   ========================================== */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 600;
}

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

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

.badge-success {
    background: #E8F5E9;
    color: #2E7D32;
}

.badge-warning {
    background: #FFF8E1;
    color: #F57F17;
}

.badge-error {
    background: #FFEBEE;
    color: #C62828;
}

/* ==========================================
   首页样式
   ========================================== */
.home-hero {
    padding: var(--space-6) 0 var(--space-4);
}

.home-greeting {
    font-family: var(--font-serif);
    font-size: var(--text-2xl);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--space-1);
}

.home-subtitle {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

/* 词书卡片 */
.wordbook-card {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    padding: var(--space-5);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
    border: 1px solid var(--color-border-light);
}

.wordbook-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
}

.wordbook-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: var(--space-4);
}

.wordbook-info h3 {
    font-family: var(--font-serif);
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--space-1);
}

.wordbook-meta {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

.wordbook-settings {
    color: var(--color-text-muted);
    font-size: var(--text-sm);
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.wordbook-settings:hover {
    color: var(--color-primary);
    background: var(--color-primary-bg);
}

/* 今日任务 */
.task-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
    margin: var(--space-5) 0;
}

.task-item {
    text-align: center;
    padding: var(--space-3);
    border-radius: var(--radius-md);
    background: var(--color-bg);
}

.task-number {
    font-family: var(--font-serif);
    font-size: var(--text-3xl);
    font-weight: 700;
    color: var(--color-text);
    line-height: 1.2;
}

.task-unit {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

.task-label {
    font-size: var(--text-xs);
    color: var(--color-text-secondary);
    margin-top: var(--space-1);
}

/* 快捷功能 */
.quick-actions {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-3);
    margin-top: var(--space-5);
}

.quick-action-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-2);
    border-radius: var(--radius-lg);
    background: var(--color-primary-bg);
    color: var(--color-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    border: 1px solid transparent;
}

.quick-action-item:hover {
    background: var(--color-surface);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-sm);
}

.quick-action-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    background: var(--color-primary);
    color: var(--color-text-inverse);
}

.quick-action-icon svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.quick-action-label {
    font-size: var(--text-sm);
    font-weight: 500;
}

/* ==========================================
   背诵学习页
   ========================================== */
.flashcard-container {
    perspective: 1000px;
    width: 100%;
    padding: var(--space-4) 0;
}

.flashcard {
    width: 100%;
    height: 340px;
    position: relative;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}

.flashcard-inner {
    position: relative;
    width: 100%;
    height: 340px;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    transform-style: preserve-3d;
}

.flashcard.flipped .flashcard-inner {
    transform: rotateY(180deg);
}

/* 下滑提示 - 卡片外部，按钮上方 */
.flashcard-scroll-hint {
    text-align: center;
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    padding: var(--space-3) 0 var(--space-1);
    opacity: 0.7;
    animation: scrollHintPulse 1.5s ease-in-out infinite;
}

@keyframes scrollHintPulse {
    0%, 100% { opacity: 0.4; transform: translateY(0); }
    50% { opacity: 0.9; transform: translateY(3px); }
}

.flashcard-front,
.flashcard-back {
    position: absolute;
    width: 100%;
    height: 340px;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    border-radius: var(--radius-xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-8);
    box-shadow: var(--shadow-lg);
    box-sizing: border-box;
}

.flashcard-front {
    background: var(--color-surface);
    border: 2px solid var(--color-border);
}

.flashcard-back {
    background: var(--color-surface);
    border: 2px solid var(--color-primary);
    transform: rotateY(180deg);
    justify-content: flex-start;
    padding: var(--space-6);
    overflow-y: auto;
}

.flashcard-word {
    font-family: var(--font-serif);
    font-size: 3.5rem;
    font-weight: 900;
    color: var(--color-text);
    letter-spacing: 8px;
    margin-bottom: var(--space-3);
}

.flashcard-hint {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

.flashcard-meaning-title {
    font-size: var(--text-sm);
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: var(--space-4);
    letter-spacing: 2px;
}

.flashcard-meaning-list {
    list-style: none;
    width: 100%;
    text-align: left;
}

.flashcard-meaning-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-2);
    padding: var(--space-3) 0;
    border-bottom: 1px solid var(--color-border-light);
}

.flashcard-meaning-item:last-child {
    border-bottom: none;
}

.flashcard-meaning-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    border-radius: var(--radius-full);
    background: var(--color-primary-bg);
    color: var(--color-primary);
    font-size: var(--text-xs);
    font-weight: 700;
    flex-shrink: 0;
    margin-top: 2px;
}

.flashcard-meaning-text {
    font-size: var(--text-base);
    color: var(--color-text);
    font-weight: 500;
    line-height: 1.4;
}

.flashcard-example {
    margin-top: var(--space-1);
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* 背诵操作按钮 */
.recite-actions {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: var(--space-3);
    margin-top: var(--space-6);
}

.recite-action-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-2);
    border-radius: var(--radius-lg);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    font-weight: 600;
    min-height: 60px;
    justify-content: center;
}

.recite-action-btn:active {
    transform: scale(0.95);
}

.recite-action-btn.forget {
    background: #FFEBEE;
    color: #C62828;
    border-color: #FFCDD2;
}
.recite-action-btn.forget:hover {
    background: #FFCDD2;
}

.recite-action-btn.fuzzy {
    background: #FFF8E1;
    color: #F57F17;
    border-color: #FFECB3;
}
.recite-action-btn.fuzzy:hover {
    background: #FFECB3;
}

.recite-action-btn.known {
    background: #E8F5E9;
    color: #2E7D32;
    border-color: #C8E6C9;
}
.recite-action-btn.known:hover {
    background: #C8E6C9;
}

/* ==========================================
   练习模式
   ========================================== */
.practice-header {
    text-align: center;
    padding: var(--space-4) 0;
}

.practice-progress {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-3);
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

.practice-question {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--space-5);
}

.practice-question-word {
    font-family: var(--font-serif);
    font-size: var(--text-4xl);
    font-weight: 900;
    text-align: center;
    letter-spacing: 6px;
    margin-bottom: var(--space-3);
}

.practice-question-prompt {
    text-align: center;
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

.practice-options {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.practice-option {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-surface);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: var(--text-base);
    min-height: 52px;
}

.practice-option:hover {
    border-color: var(--color-primary);
    background: var(--color-primary-bg);
}

.practice-option:active {
    transform: scale(0.98);
}

.practice-option.selected {
    border-color: var(--color-primary);
    background: var(--color-primary-bg);
}

.practice-option.correct {
    border-color: #2E7D32;
    background: #E8F5E9;
}

.practice-option.wrong {
    border-color: #C62828;
    background: #FFEBEE;
}

.practice-option-letter {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    background: var(--color-bg-secondary);
    font-weight: 700;
    font-size: var(--text-sm);
    flex-shrink: 0;
}

/* ==========================================
   词书浏览页
   ========================================== */
.browse-search {
    position: relative;
    margin-bottom: var(--space-4);
}

.browse-search input {
    width: 100%;
    padding: var(--space-3) var(--space-4) var(--space-3) 44px;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-full);
    font-size: var(--text-base);
    font-family: var(--font-sans);
    background: var(--color-surface);
    color: var(--color-text);
    min-height: 44px;
}

.browse-search input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(44,95,74,0.1);
}

.browse-search-icon {
    position: absolute;
    left: var(--space-4);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-muted);
    width: 20px;
    height: 20px;
}

.word-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.word-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-3) var(--space-4);
    background: var(--color-surface);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border-light);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.word-item:hover {
    background: var(--color-surface-hover);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-sm);
}

.word-item-word {
    font-family: var(--font-serif);
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--color-text);
    width: 60px;
}

.word-item-meaning {
    flex: 1;
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    padding: 0 var(--space-3);
}

.word-item-status {
    width: 8px;
    height: 8px;
    border-radius: var(--radius-full);
    flex-shrink: 0;
}

.word-item-status.new { background: var(--color-border); }
.word-item-status.learning { background: var(--color-warning); }
.word-item-status.mastered { background: var(--color-success); }

/* 词详情弹窗 */
.word-detail-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 200;
    display: none;
    align-items: flex-end;
    justify-content: center;
}

.word-detail-modal.show {
    display: flex;
}

.word-detail-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.4);
}

.word-detail-content {
    position: relative;
    width: 100%;
    max-width: var(--container-max);
    max-height: 80vh;
    background: var(--color-surface);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    padding: var(--space-6);
    overflow-y: auto;
    z-index: 1;
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from { transform: translateY(100%); }
    to { transform: translateY(0); }
}

.word-detail-close {
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    background: var(--color-bg-secondary);
    cursor: pointer;
    color: var(--color-text-secondary);
    border: none;
    font-size: var(--text-lg);
}

/* ==========================================
   统计页
   ========================================== */
.stats-overview {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
    margin-bottom: var(--space-5);
}

.stat-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    border: 1px solid var(--color-border-light);
}

.stat-number {
    font-family: var(--font-serif);
    font-size: var(--text-2xl);
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1.2;
}

.stat-label {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    margin-top: var(--space-1);
}

.stats-chart {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    border: 1px solid var(--color-border-light);
    margin-bottom: var(--space-4);
}

.stats-chart-title {
    font-size: var(--text-base);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-4);
}

/* 简易柱状图 */
.bar-chart {
    display: flex;
    align-items: flex-end;
    gap: 4px;
    height: 120px;
    padding: var(--space-2) 0;
}

.bar-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-1);
    height: 100%;
    justify-content: flex-end;
}

.bar-fill {
    width: 100%;
    max-width: 28px;
    border-radius: 4px 4px 0 0;
    background: linear-gradient(to top, var(--color-primary), var(--color-primary-light));
    transition: height var(--transition-slow);
    min-height: 2px;
}

.bar-label {
    font-size: 10px;
    color: var(--color-text-muted);
    margin-top: 4px;
}

/* ==========================================
   个人中心
   ========================================== */
.profile-header {
    text-align: center;
    padding: var(--space-6) 0;
}

.profile-avatar {
    width: 72px;
    height: 72px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: var(--color-text-inverse);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-serif);
    font-size: var(--text-2xl);
    font-weight: 700;
    margin: 0 auto var(--space-3);
}

.profile-name {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--color-text);
}

.profile-menu {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.profile-menu-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4);
    background: var(--color-surface);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border-light);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    color: var(--color-text);
}

.profile-menu-item:hover {
    background: var(--color-surface-hover);
    border-color: var(--color-primary);
}

.profile-menu-left {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.profile-menu-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-lg);
}

.profile-menu-text {
    font-size: var(--text-base);
    font-weight: 500;
}

.profile-menu-arrow {
    color: var(--color-text-muted);
    font-size: var(--text-sm);
}

/* ==========================================
   荣誉标识徽章
   ========================================== */
.honor-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px 4px 10px;
    border-radius: var(--radius-full);
    background: var(--color-surface);
    border: 1px solid var(--color-border-light);
    text-decoration: none;
    font-size: 12px;
    font-weight: 600;
    color: var(--badge-color, var(--color-primary));
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.honor-badge:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--badge-color, var(--color-primary));
}

.honor-badge-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--color-primary), #4A90D9);
    color: #fff;
    flex-shrink: 0;
}

/* ==========================================
   登录/注册页
   ========================================== */
.auth-page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-6);
    background: var(--color-bg);
    position: relative;
}

.auth-page::before {
    content: '';
    position: absolute;
    top: 10%;
    left: 50%;
    transform: translateX(-50%);
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(44,95,74,0.08) 0%, transparent 70%);
    pointer-events: none;
}

.auth-logo {
    font-family: var(--font-serif);
    font-size: var(--text-3xl);
    font-weight: 900;
    color: var(--color-primary-dark);
    letter-spacing: 4px;
    margin-bottom: var(--space-2);
    text-align: center;
}

.auth-tagline {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    text-align: center;
    margin-bottom: var(--space-8);
}

.auth-form {
    width: 100%;
    max-width: 360px;
}

.auth-link {
    text-align: center;
    margin-top: var(--space-5);
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

.auth-link a {
    color: var(--color-primary);
    font-weight: 600;
}

/* ==========================================
   Toast 通知
   ========================================== */
.toast-container {
    position: fixed;
    top: var(--space-4);
    left: 50%;
    transform: translateX(-50%);
    z-index: 300;
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    pointer-events: none;
}

.toast {
    padding: var(--space-3) var(--space-5);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-inverse);
    box-shadow: var(--shadow-lg);
    animation: toastIn 0.3s ease, toastOut 0.3s ease 2.7s forwards;
    pointer-events: auto;
    white-space: nowrap;
}

.toast.success { background: var(--color-success); }
.toast.error { background: var(--color-error); }
.toast.warning { background: var(--color-warning); }
.toast.info { background: var(--color-info); }

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

@keyframes toastOut {
    from { opacity: 1; }
    to { opacity: 0; transform: translateY(-10px); }
}

/* ==========================================
   模态框
   ========================================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 200;
    display: none;
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
}

.modal-overlay.show {
    display: flex;
}

.modal-box {
    width: 100%;
    max-width: 360px;
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    box-shadow: var(--shadow-xl);
    animation: modalIn 0.25s ease;
}

@keyframes modalIn {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}

.modal-title {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--space-4);
}

.modal-body {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-6);
    line-height: 1.8;
}

.modal-footer {
    display: flex;
    gap: var(--space-3);
    justify-content: flex-end;
}

/* ==========================================
   空状态
   ========================================== */
.empty-state {
    text-align: center;
    padding: var(--space-12) var(--space-4);
    color: var(--color-text-muted);
}

.empty-state-icon {
    font-size: 3rem;
    margin-bottom: var(--space-4);
    opacity: 0.4;
}

.empty-state-title {
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.empty-state-desc {
    font-size: var(--text-sm);
}

/* ==========================================
   加载状态
   ========================================== */
.loading-spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: var(--space-8) auto;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ==========================================
   分类标签
   ========================================== */
.category-tabs {
    display: flex;
    gap: var(--space-2);
    overflow-x: auto;
    padding: var(--space-2) 0;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.category-tabs::-webkit-scrollbar {
    display: none;
}

.category-tab {
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: 500;
    white-space: nowrap;
    cursor: pointer;
    transition: all var(--transition-fast);
    background: var(--color-surface);
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
}

.category-tab.active {
    background: var(--color-primary);
    color: var(--color-text-inverse);
    border-color: var(--color-primary);
}

.category-tab:hover:not(.active) {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

/* ==========================================
   响应式
   ========================================== */
@media (min-width: 768px) {
    :root {
        --container-max: 600px;
        --container-wide: 900px;
    }

    .nav-bar {
        max-width: var(--container-wide);
        left: 50%;
        transform: translateX(-50%);
        border-radius: var(--radius-xl) var(--radius-xl) 0 0;
        box-shadow: 0 -2px 20px rgba(0,0,0,0.08);
    }

    .page-content {
        padding-bottom: calc(80px + var(--space-10));
    }
}

/* ==========================================
   工具类
   ========================================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.text-primary { color: var(--color-primary); }
.text-accent { color: var(--color-accent); }
.text-muted { color: var(--color-text-muted); }
.font-serif { font-family: var(--font-serif); }
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }
.hidden { display: none !important; }

/* ========================================
   管理后台样式
   ======================================== */
/* 后台布局 */
.admin-layout {
    display: flex;
    min-height: 100vh;
}

.admin-sidebar {
    width: 220px;
    background: var(--color-primary-dark);
    color: var(--color-text-inverse);
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 50;
    overflow-y: auto;
}

.admin-sidebar-header {
    padding: var(--space-5) var(--space-4);
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.admin-sidebar-header h2 {
    font-family: var(--font-serif);
    font-size: var(--text-base);
    font-weight: 700;
    letter-spacing: 2px;
    margin-bottom: var(--space-1);
}

.admin-sidebar-header p {
    font-size: var(--text-xs);
    opacity: 0.6;
}

.admin-nav {
    padding: var(--space-3) 0;
}

.admin-nav-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-5);
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    font-size: var(--text-sm);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.admin-nav-item:hover {
    background: rgba(255,255,255,0.1);
    color: #fff;
}

.admin-nav-item.active {
    background: rgba(255,255,255,0.15);
    color: #fff;
    border-right: 3px solid var(--color-accent);
}

.admin-nav-item svg {
    width: 18px;
    height: 18px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    flex-shrink: 0;
}

.admin-main {
    flex: 1;
    margin-left: 220px;
    background: #F0EDE6;
    min-height: 100vh;
}

.admin-topbar {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-3) var(--space-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 40;
}

.admin-topbar h1 {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--color-text);
}

.admin-topbar-right {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.admin-content {
    padding: var(--space-6);
}

/* 后台卡片 */
.admin-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border-light);
    margin-bottom: var(--space-4);
}

.admin-card-title {
    font-size: var(--text-base);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--space-4);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* 后台表格 */
.admin-table-wrap {
    overflow-x: auto;
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--text-sm);
}

.admin-table th,
.admin-table td {
    text-align: left;
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--color-border-light);
}

.admin-table th {
    background: var(--color-bg);
    font-weight: 600;
    color: var(--color-text-secondary);
    white-space: nowrap;
}

.admin-table tr:hover td {
    background: var(--color-surface-hover);
}

.admin-table td {
    vertical-align: top;
}

/* 后台统计卡片 */
.admin-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

.admin-stat-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    border: 1px solid var(--color-border-light);
}

.admin-stat-card .stat-number {
    font-size: var(--text-2xl);
    font-weight: 700;
}

.admin-stat-card .stat-label {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    margin-top: var(--space-1);
}

/* 后台表单 */
.admin-form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
}

.admin-form-grid .full-width {
    grid-column: 1 / -1;
}

textarea.form-input {
    min-height: 80px;
    resize: vertical;
}

/* 后台操作按钮组 */
.btn-group {
    display: flex;
    gap: var(--space-2);
}

.btn-sm {
    padding: var(--space-1) var(--space-3);
    font-size: var(--text-xs);
    min-height: 32px;
}

.btn-danger {
    background: var(--color-error);
    color: var(--color-text-inverse);
}
.btn-danger:hover {
    background: #d32f2f;
}

/* 后台分页 */
.admin-pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    margin-top: var(--space-4);
}

.admin-pagination a,
.admin-pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    font-size: var(--text-sm);
    text-decoration: none;
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
}

.admin-pagination a:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.admin-pagination .active {
    background: var(--color-primary);
    color: var(--color-text-inverse);
    border-color: var(--color-primary);
}

/* 后台登录页 */
.admin-login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
}

.admin-login-box {
    width: 100%;
    max-width: 400px;
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    box-shadow: var(--shadow-xl);
}

.admin-login-box h2 {
    font-family: var(--font-serif);
    font-size: var(--text-2xl);
    color: var(--color-primary-dark);
    text-align: center;
    margin-bottom: var(--space-2);
}

.admin-login-box p {
    text-align: center;
    color: var(--color-text-muted);
    font-size: var(--text-sm);
    margin-bottom: var(--space-6);
}

/* 后台空状态 */
.admin-empty {
    text-align: center;
    padding: var(--space-8);
    color: var(--color-text-muted);
}

/* 响应式 - 后台 */
/* 出处样式 */
.flashcard-source {
    display: block;
    margin-top: 4px;
    font-size: var(--text-xs, 0.75rem);
    color: var(--color-accent, #C4704B);
    font-style: italic;
    opacity: 0.85;
}

/* 响应式 - 后台 */
@media (max-width: 768px) {
    .admin-sidebar {
        width: 60px;
    }
    .admin-sidebar-header h2,
    .admin-sidebar-header p,
    .admin-nav-item span {
        display: none;
    }
    .admin-nav-item {
        justify-content: center;
        padding: var(--space-3);
    }
    .admin-main {
        margin-left: 60px;
    }
    .admin-form-grid {
        grid-template-columns: 1fr;
    }
    .admin-stats {
        grid-template-columns: 1fr 1fr;
    }
}

/* ========================================
   考试模式样式
   ======================================== */

/* 考试设置 */
.exam-setup-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
    margin-bottom: var(--space-4);
}
.exam-setup-row {
    margin-bottom: var(--space-4);
}
.exam-setup-label {
    display: block;
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-1);
    font-weight: 500;
}
.exam-setup-select {
    width: 100%;
    padding: var(--space-2) var(--space-3);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--text-base);
    background: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-sans);
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238A8A8A' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
}
.exam-start-btn {
    margin-top: var(--space-2);
    padding: var(--space-3);
    font-size: var(--text-lg);
    font-weight: 600;
}

/* 考试说明 */
.exam-tips {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    border-left: 4px solid var(--color-primary);
}
.exam-tips-title {
    font-weight: 600;
    margin-bottom: var(--space-2);
    color: var(--color-primary);
}
.exam-tips ul {
    list-style: none;
    padding: 0;
    margin: 0;
}
.exam-tips li {
    position: relative;
    padding-left: var(--space-4);
    margin-bottom: var(--space-1);
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}
.exam-tips li::before {
    content: '•';
    position: absolute;
    left: 4px;
    color: var(--color-accent);
    font-weight: bold;
}

/* 考试顶部栏 */
.exam-topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-2) var(--space-3);
    background: var(--color-surface);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-2);
}
.exam-topbar-title {
    font-weight: 600;
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}
.exam-topbar-center {
    font-family: var(--font-serif);
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: 2px;
}
.exam-topbar-right {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

/* 考试题目卡片 */
.exam-question-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}
.exam-question-header {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-3);
}
.exam-question-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: var(--color-primary);
    color: white;
    border-radius: 50%;
    font-size: var(--text-sm);
    font-weight: 700;
}
.exam-question-type {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    background: var(--color-bg);
    padding: 2px 8px;
    border-radius: 10px;
}
.exam-question-text {
    font-size: var(--text-xl);
    font-weight: 600;
    font-family: var(--font-serif);
    color: var(--color-text);
    margin-bottom: var(--space-4);
    line-height: 1.6;
}

/* 考试选项 */
.exam-options {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}
.exam-option {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s ease;
    background: var(--color-surface);
}
.exam-option:hover {
    border-color: var(--color-primary-light);
    background: var(--color-surface-hover);
}
.exam-option.selected {
    border-color: var(--color-primary);
    background: rgba(44, 95, 74, 0.06);
}
.exam-option-circle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    border: 2px solid var(--color-border);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text-secondary);
    flex-shrink: 0;
    transition: all 0.2s ease;
}
.exam-option.selected .exam-option-circle {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
}
.exam-option-text {
    font-size: var(--text-base);
    color: var(--color-text);
    line-height: 1.5;
}

/* ========================================
   考试成绩单样式
   ======================================== */
.exam-result-paper {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    box-shadow: 0 2px 16px rgba(0,0,0,0.08);
}
.exam-result-header {
    text-align: center;
    margin-bottom: var(--space-5);
}
.exam-result-title {
    font-size: var(--text-2xl);
    font-weight: 700;
    font-family: var(--font-serif);
    color: var(--color-text);
}
.exam-result-meta {
    display: flex;
    justify-content: center;
    gap: var(--space-4);
    margin-top: var(--space-2);
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

/* 分数区 */
.exam-result-score-area {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-8);
    padding: var(--space-5) 0;
}
.exam-result-score-box {
    text-align: center;
}
.exam-result-score-label {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--space-1);
}
.exam-result-score-num {
    font-size: 3rem;
    font-weight: 900;
    font-family: var(--font-serif);
}
.score-pass {
    color: var(--color-success);
}
.score-fail {
    color: var(--color-error);
}
.exam-result-stats {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}
.exam-result-stat {
    text-align: center;
}
.exam-result-stat-num {
    display: block;
    font-size: var(--text-2xl);
    font-weight: 700;
}
.exam-result-stat-label {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
}
.exam-result-stat-divider {
    font-size: var(--text-lg);
    color: var(--color-border);
}
.exam-result-divider {
    height: 1px;
    background: var(--color-border);
    margin: var(--space-4) 0;
}

/* 逐题详情 */
.exam-result-questions {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}
.exam-result-question {
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
}
.exam-result-question.result-correct {
    border-left: 4px solid var(--color-success);
}
.exam-result-question.result-wrong {
    border-left: 4px solid var(--color-error);
}
.exam-result-q-header {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border-light);
}
.exam-result-q-num {
    font-weight: 700;
    font-size: var(--text-sm);
    color: var(--color-text);
}
.exam-result-q-type {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    background: var(--color-surface);
    padding: 1px 6px;
    border-radius: 8px;
}
.exam-result-q-score {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    margin-left: auto;
}
.exam-result-q-body {
    padding: var(--space-3);
}
.exam-result-q-text {
    font-size: var(--text-base);
    line-height: 1.6;
    margin-bottom: var(--space-3);
}
.exam-result-q-options {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}
.exam-result-option {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
}
.exam-result-option.option-correct {
    background: rgba(44, 95, 74, 0.06);
    border-color: rgba(44, 95, 74, 0.15);
}
.exam-result-option.option-wrong {
    background: rgba(196, 72, 72, 0.06);
    border-color: rgba(196, 72, 72, 0.15);
}
.exam-result-option-marker {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    flex-shrink: 0;
}
.option-correct .exam-result-option-marker {
    color: var(--color-success);
}
.option-wrong .exam-result-option-marker {
    color: var(--color-error);
}
.exam-result-option-empty {
    display: inline-block;
    width: 14px;
    height: 14px;
    border: 2px solid var(--color-border);
    border-radius: 50%;
}
.exam-result-option-text {
    font-size: var(--text-sm);
    color: var(--color-text);
    line-height: 1.5;
}
.option-tag {
    font-size: var(--text-xs);
    font-weight: 500;
    margin-left: auto;
    flex-shrink: 0;
}
.tag-correct {
    color: var(--color-success);
}
.tag-wrong {
    color: var(--color-error);
}

/* 历史成绩 */
.exam-history-chart {
    margin-bottom: var(--space-4);
}
.exam-history-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}
.exam-history-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background 0.2s;
}
.exam-history-item:hover {
    background: var(--color-bg);
}
.exam-history-item.current {
    background: rgba(44, 95, 74, 0.06);
    border-left: 3px solid var(--color-primary);
}
.exam-history-date {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}
.exam-history-score {
    font-size: var(--text-base);
    font-weight: 700;
}