/* ============================================
   modules.css - 勤学苦练 + 闯天关 模块样式
   ============================================ */

/* ========== 通用模块容器 ========== */
.study-module, .challenge-module {
    /* 宽度跟随父容器，不额外限制 */
}

/* ========== 子Tab ========== */
.study-sub-tabs, .challenge-sub-tabs {
    display: flex;
    gap: 4px;
    background: rgba(30, 41, 59, 0.5);
    border-radius: 12px;
    padding: 4px;
    margin-bottom: 16px;
}

.sub-tab {
    flex: 1;
    padding: 10px 16px;
    border: none;
    background: transparent;
    color: #94a3b8;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.sub-tab:hover {
    color: #e2e8f0;
    background: rgba(255, 255, 255, 0.05);
}

.sub-tab.active {
    background: var(--accent, #6366f1);
    color: white;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}

/* ========== 课程选择页 ========== */
.course-page {
    padding: 0 4px;
}

.level-tabs-scroll {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding: 4px 0 12px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.level-tabs-scroll::-webkit-scrollbar { display: none; }

.level-tab {
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 12px 16px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(30, 41, 59, 0.4);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s;
    min-width: 80px;
}

.level-tab:hover {
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-1px);
}

.level-tab-icon { font-size: 1.2rem; }
.level-tab-name { font-size: 0.8rem; font-weight: 600; }
.level-tab-pct { font-size: 0.7rem; opacity: 0.7; }

/* ========== 掌握进度 ========== */
.mastery-progress-row {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 16px;
    background: rgba(30, 41, 59, 0.3);
    border-radius: 12px;
    margin-bottom: 16px;
}

.mastery-progress-item {
    display: flex;
    align-items: center;
    gap: 10px;
}

.mastery-label {
    font-size: 0.85rem;
    color: #94a3b8;
    min-width: 60px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.mastery-count {
    font-size: 0.75rem;
    color: #64748b;
}

.mastery-bar {
    flex: 1;
    height: 8px;
    background: rgba(30, 41, 59, 0.6);
    border-radius: 4px;
    overflow: hidden;
}

.mastery-fill {
    height: 100%;
    border-radius: 4px;
    transition: width 0.4s ease;
}

.mastery-pct {
    font-size: 0.8rem;
    font-weight: 600;
    color: #e2e8f0;
    min-width: 36px;
    text-align: right;
}

/* ========== 单元卡片 ========== */
.unit-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.unit-card {
    background: rgba(30, 41, 59, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 12px;
    padding: 14px 16px;
    cursor: pointer;
    transition: all 0.2s;
}

.unit-card:hover {
    background: rgba(30, 41, 59, 0.5);
    border-color: rgba(99, 102, 241, 0.3);
    transform: translateX(4px);
}

.unit-card.selected {
    border-color: var(--accent, #6366f1);
    background: rgba(99, 102, 241, 0.08);
}

.unit-card.mastered {
    opacity: 0.7;
}

.unit-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
}

.unit-card-number {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(99, 102, 241, 0.15);
    color: #a5b4fc;
    border-radius: 8px;
    font-weight: 700;
    font-size: 0.85rem;
}

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

.unit-card-name {
    font-size: 0.95rem;
    font-weight: 600;
    color: #e2e8f0;
    margin-bottom: 4px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.unit-card-meta {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.meta-tag {
    font-size: 0.78rem;
    color: #64748b;
    display: flex;
    align-items: center;
    gap: 4px;
}

.meta-tag.done { color: #10b981; }
.meta-tag i { font-size: 0.7rem; }

.unit-card-arrow {
    color: #475569;
    font-size: 0.85rem;
}

/* ========== 学习页 ========== */
.learn-page {
    padding: 0 4px;
}

.learn-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.learn-unit-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

.back-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: rgba(255, 255, 255, 0.06);
    color: #94a3b8;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.9rem;
}

.back-btn:hover { background: rgba(255, 255, 255, 0.12); color: #e2e8f0; }

.learn-unit-name {
    font-size: 1rem;
    font-weight: 600;
    color: #e2e8f0;
}

.review-badge {
    display: inline-block;
    padding: 2px 8px;
    background: rgba(245, 158, 11, 0.15);
    color: #f59e0b;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 6px;
    border: 1px solid rgba(245, 158, 11, 0.3);
}

.learn-controls {
    display: flex;
    gap: 8px;
}

.hide-toggle-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: transparent;
    color: #94a3b8;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.85rem;
}

.hide-toggle-btn:hover { color: #e2e8f0; border-color: rgba(255, 255, 255, 0.2); }

.learn-progress-bar {
    height: 6px;
    background: rgba(30, 41, 59, 0.6);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 4px;
}

.learn-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #6366f1, #a78bfa);
    border-radius: 3px;
    transition: width 0.3s ease;
}

.learn-progress-text {
    font-size: 0.75rem;
    color: #64748b;
    text-align: right;
    margin-bottom: 16px;
}

/* ========== 学习卡片 ========== */
.learn-card {
    background: rgba(30, 41, 59, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 16px;
    padding: 24px;
    margin-bottom: 20px;
    min-height: 200px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.card-type-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.word-badge {
    background: rgba(16, 185, 129, 0.12);
    color: #10b981;
    border: 1px solid rgba(16, 185, 129, 0.25);
}

.sentence-badge {
    background: rgba(99, 102, 241, 0.12);
    color: #6366f1;
    border: 1px solid rgba(99, 102, 241, 0.25);
}

.dialogue-badge {
    background: rgba(245, 158, 11, 0.12);
    color: #f59e0b;
    border: 1px solid rgba(245, 158, 11, 0.25);
}

.card-indo {
    font-size: 1.8rem;
    font-weight: 700;
    color: #e2e8f0;
    margin-bottom: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: color 0.2s;
}

.card-indo:hover { color: var(--accent, #6366f1); }

.card-play-icon { font-size: 1rem; color: var(--accent, #6366f1); opacity: 0.6; }

.card-zh {
    font-size: 1.2rem;
    color: #94a3b8;
    transition: opacity 0.2s;
}

/* ========== 对话卡片 ========== */
.dialogue-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: #e2e8f0;
    margin-bottom: 16px;
    text-align: center;
}

.dialogue-container {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.dialogue-line {
    padding: 10px 14px;
    border-radius: 10px;
    max-width: 85%;
}

.dialogue-line.speaker-a {
    align-self: flex-start;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.15);
}

.dialogue-line.speaker-b {
    align-self: flex-end;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.15);
}

.dialogue-speaker {
    font-size: 0.75rem;
    font-weight: 700;
    color: #64748b;
    margin-bottom: 4px;
}

.dialogue-indo {
    font-size: 0.95rem;
    color: #e2e8f0;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
}

.dialogue-play-icon { font-size: 0.75rem; opacity: 0.5; }

.dialogue-zh {
    font-size: 0.85rem;
    color: #94a3b8;
    margin-top: 4px;
}

/* ========== 学习导航 ========== */
.learn-nav-row {
    display: flex;
    gap: 8px;
    justify-content: space-between;
}

.learn-nav-btn {
    padding: 10px 20px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: transparent;
    color: #94a3b8;
    border-radius: 10px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 6px;
}

.learn-nav-btn:hover:not(:disabled) {
    border-color: rgba(255, 255, 255, 0.2);
    color: #e2e8f0;
}

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

.learn-nav-btn.primary {
    background: var(--accent, #6366f1);
    border-color: var(--accent, #6366f1);
    color: white;
}

.learn-nav-btn.primary:hover {
    background: #4f46e5;
}

/* ========== 练习页 ========== */
.practice-page {
    padding: 0 4px;
}

.practice-header {
    text-align: center;
    margin-bottom: 20px;
}

.practice-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: #e2e8f0;
    margin-bottom: 4px;
}

.practice-unit-name {
    font-size: 0.85rem;
    color: #64748b;
}

.practice-stats-row {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
}

.practice-stat-card {
    flex: 1;
    text-align: center;
    padding: 14px;
    background: rgba(30, 41, 59, 0.3);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.06);
}

.practice-stat-num {
    font-size: 1.5rem;
    font-weight: 700;
    color: #a5b4fc;
}

.practice-stat-label {
    font-size: 0.8rem;
    color: #64748b;
    margin-top: 2px;
}

.practice-section-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: #94a3b8;
    margin-bottom: 10px;
}

.practice-type-section, .practice-mastery-section {
    margin-bottom: 20px;
}

.practice-type-btns {
    display: flex;
    gap: 8px;
}

.ptype-btn {
    flex: 1;
    padding: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: transparent;
    color: #94a3b8;
    border-radius: 10px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.ptype-btn:hover {
    border-color: rgba(99, 102, 241, 0.3);
    color: #e2e8f0;
}

.ptype-btn.active {
    background: rgba(99, 102, 241, 0.15);
    border-color: rgba(99, 102, 241, 0.4);
    color: #a5b4fc;
}

.mastery-check-row {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 14px;
    background: rgba(30, 41, 59, 0.3);
    border-radius: 12px;
    border: 1px dashed rgba(255, 255, 255, 0.1);
}

.mastery-check-item {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    color: #cbd5e1;
    font-size: 0.9rem;
}

.mastery-check-item input[type="checkbox"] {
    width: 20px;
    height: 20px;
    accent-color: var(--accent, #6366f1);
    cursor: pointer;
}

/* ========== 答题界面 ========== */
.quiz-container {
    padding: 16px 0;
}

.quiz-progress-bar {
    height: 6px;
    background: rgba(30, 41, 59, 0.6);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 4px;
}

.quiz-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #10b981, #34d399);
    border-radius: 3px;
    transition: width 0.3s ease;
}

.quiz-counter {
    font-size: 0.75rem;
    color: #64748b;
    text-align: right;
    margin-bottom: 16px;
}

.quiz-type-tag {
    display: inline-block;
    padding: 2px 10px;
    background: rgba(99, 102, 241, 0.12);
    color: #a5b4fc;
    border-radius: 6px;
    font-size: 0.78rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.quiz-type-tag.fill-tag {
    background: rgba(245, 158, 11, 0.12);
    color: #fbbf24;
}

.quiz-question {
    background: rgba(30, 41, 59, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 14px;
    padding: 20px;
    margin-bottom: 16px;
    text-align: center;
}

.quiz-indo {
    font-size: 1.4rem;
    font-weight: 700;
    color: #e2e8f0;
    margin-bottom: 10px;
    cursor: pointer;
}

.quiz-prompt {
    font-size: 0.85rem;
    color: #64748b;
}

.quiz-options {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.quiz-option {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(30, 41, 59, 0.2);
    border-radius: 10px;
    cursor: pointer;
    color: #cbd5e1;
    font-size: 0.95rem;
    transition: all 0.2s;
    text-align: left;
    width: 100%;
}

.quiz-option:hover {
    border-color: rgba(99, 102, 241, 0.4);
    background: rgba(99, 102, 241, 0.08);
}

.quiz-option.correct {
    border-color: #10b981;
    background: rgba(16, 185, 129, 0.15);
    color: #34d399;
}

.quiz-option.wrong {
    border-color: #ef4444;
    background: rgba(239, 68, 68, 0.15);
    color: #f87171;
}

.quiz-option-letter {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 6px;
    font-weight: 700;
    font-size: 0.8rem;
    color: #94a3b8;
    flex-shrink: 0;
}

.quiz-option-text {
    flex: 1;
}

/* ========== 填空题 ========== */
.fill-input-area {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
}

.fill-input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(15, 23, 42, 0.6);
    color: #e2e8f0;
    border-radius: 10px;
    font-size: 0.95rem;
    outline: none;
    transition: border-color 0.2s;
}

.fill-input:focus {
    border-color: var(--accent, #6366f1);
}

.fill-submit-btn {
    padding: 12px 24px;
    background: var(--accent, #6366f1);
    color: white;
    border: none;
    border-radius: 10px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

.fill-submit-btn:hover { background: #4f46e5; }

.fill-feedback {
    padding: 12px 16px;
    border-radius: 10px;
    font-size: 0.9rem;
    margin-bottom: 12px;
}

.fill-feedback.correct {
    background: rgba(16, 185, 129, 0.1);
    color: #34d399;
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.fill-feedback.wrong {
    background: rgba(239, 68, 68, 0.1);
    color: #f87171;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.fill-actions {
    text-align: center;
}

.fill-next-btn {
    padding: 10px 28px;
    background: rgba(99, 102, 241, 0.15);
    color: #a5b4fc;
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: 10px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s;
}

.fill-next-btn:hover {
    background: rgba(99, 102, 241, 0.25);
}

/* ========== 答题结果 ========== */
.quiz-result {
    text-align: center;
    padding: 40px 20px;
}

.result-icon {
    font-size: 3rem;
    color: #a5b4fc;
    margin-bottom: 12px;
}

.result-msg {
    font-size: 1.3rem;
    font-weight: 700;
    color: #e2e8f0;
    margin-bottom: 16px;
}

.result-score {
    font-size: 2.5rem;
    font-weight: 800;
    color: #a5b4fc;
    margin-bottom: 4px;
}

.result-pct {
    font-size: 1rem;
    color: #64748b;
    margin-bottom: 24px;
}

.result-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.result-btn {
    padding: 10px 24px;
    border-radius: 10px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s;
}

.result-btn.retry {
    background: rgba(99, 102, 241, 0.15);
    color: #a5b4fc;
    border: 1px solid rgba(99, 102, 241, 0.3);
}

.result-btn.retry:hover { background: rgba(99, 102, 241, 0.25); }

.result-btn.back {
    background: transparent;
    color: #94a3b8;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.result-btn.back:hover { color: #e2e8f0; border-color: rgba(255, 255, 255, 0.2); }

/* ========== 闯天关 - 关卡地图 ========== */
.stages-page {
    padding: 0 4px;
}

.stages-summary {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
}

.summary-card {
    flex: 1;
    text-align: center;
    padding: 16px;
    background: rgba(30, 41, 59, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 12px;
}

.summary-num {
    font-size: 1.8rem;
    font-weight: 800;
    color: #fbbf24;
}

.summary-label {
    font-size: 0.8rem;
    color: #64748b;
    margin-top: 2px;
}

.stage-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
    gap: 10px;
}

.stage-card {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 14px 8px;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s;
    border: 2px solid transparent;
    text-align: center;
    min-height: 90px;
}

.stage-card.available {
    background: rgba(30, 41, 59, 0.4);
    border-color: rgba(99, 102, 241, 0.3);
}

.stage-card.available:hover {
    border-color: rgba(99, 102, 241, 0.6);
    transform: translateY(-2px);
}

.stage-card.current {
    background: rgba(99, 102, 241, 0.15);
    border-color: var(--accent, #6366f1);
    animation: pulse-border 2s ease-in-out infinite;
}

@keyframes pulse-border {
    0%, 100% { box-shadow: 0 0 0 0 rgba(99, 102, 241, 0.4); }
    50% { box-shadow: 0 0 0 6px rgba(99, 102, 241, 0); }
}

.stage-card.cleared {
    background: rgba(16, 185, 129, 0.1);
    border-color: rgba(16, 185, 129, 0.3);
}

.stage-card.locked {
    background: rgba(30, 41, 59, 0.2);
    opacity: 0.4;
    cursor: not-allowed;
}

.stage-number {
    font-size: 1.1rem;
    font-weight: 800;
    color: #e2e8f0;
    margin-bottom: 4px;
}

.stage-icon {
    margin-bottom: 4px;
    font-size: 0.9rem;
    color: #94a3b8;
}

.stage-card.current .stage-icon { color: var(--accent, #6366f1); }
.stage-card.cleared .stage-icon { color: #10b981; }

.stage-name {
    font-size: 0.7rem;
    color: #94a3b8;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 80px;
}

.stage-type {
    font-size: 0.65rem;
    color: #475569;
}

.stage-best {
    font-size: 0.65rem;
    color: #10b981;
    font-weight: 600;
}

.stage-hint {
    font-size: 0.65rem;
    color: var(--accent, #6366f1);
    font-weight: 600;
}

.mini-stars {
    display: flex;
    gap: 2px;
    justify-content: center;
}

.mini-stars .fa-star {
    font-size: 0.75rem;
    color: #475569;
}

.mini-stars .fa-star.earned {
    color: #fbbf24;
}

/* ========== 闯天关 - 答题 ========== */
.challenge-play-page {
    padding: 0 4px;
}

.challenge-play-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.challenge-play-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: #e2e8f0;
}

.challenge-timer {
    font-size: 0.95rem;
    font-weight: 600;
    color: #f59e0b;
    display: flex;
    align-items: center;
    gap: 6px;
}

.challenge-progress-bar {
    height: 6px;
    background: rgba(30, 41, 59, 0.6);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 4px;
}

.challenge-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #f59e0b, #fbbf24);
    border-radius: 3px;
    transition: width 0.3s ease;
}

.challenge-progress-text {
    font-size: 0.75rem;
    color: #64748b;
    text-align: right;
    margin-bottom: 16px;
}

.challenge-question-area {
    min-height: 300px;
}

.challenge-q-type {
    display: inline-block;
    padding: 2px 10px;
    background: rgba(245, 158, 11, 0.12);
    color: #fbbf24;
    border-radius: 6px;
    font-size: 0.78rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.challenge-q-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: #e2e8f0;
    margin-bottom: 8px;
}

.challenge-q-indo {
    font-size: 1.5rem;
    font-weight: 700;
    color: #e2e8f0;
    margin-bottom: 10px;
    cursor: pointer;
}

.challenge-q-prompt {
    font-size: 0.9rem;
    color: #64748b;
    margin-bottom: 16px;
}

.challenge-options {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.challenge-option {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(30, 41, 59, 0.2);
    border-radius: 10px;
    cursor: pointer;
    color: #cbd5e1;
    font-size: 0.95rem;
    transition: all 0.2s;
    text-align: left;
    width: 100%;
}

.challenge-option:hover {
    border-color: rgba(245, 158, 11, 0.4);
    background: rgba(245, 158, 11, 0.08);
}

.challenge-option.correct {
    border-color: #10b981;
    background: rgba(16, 185, 129, 0.15);
    color: #34d399;
}

.challenge-option.wrong {
    border-color: #ef4444;
    background: rgba(239, 68, 68, 0.15);
    color: #f87171;
}

.challenge-option-letter {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 6px;
    font-weight: 700;
    font-size: 0.8rem;
    color: #94a3b8;
    flex-shrink: 0;
}

.challenge-option-text {
    flex: 1;
}

/* ========== 闯关结果 ========== */
.challenge-result-page {
    text-align: center;
    padding: 40px 20px;
}

.challenge-result-icon {
    margin-bottom: 16px;
}

.challenge-result-icon .mini-stars .fa-star.earned {
    font-size: 2rem;
}

.challenge-result-title {
    font-size: 1.5rem;
    font-weight: 800;
    color: #e2e8f0;
    margin-bottom: 20px;
}

.challenge-result-stats {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-bottom: 20px;
}

.result-stat {
    text-align: center;
}

.result-stat-label {
    font-size: 0.8rem;
    color: #64748b;
    margin-bottom: 4px;
}

.result-stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: #cbd5e1;
}

.result-stat-value.highlight {
    color: #fbbf24;
    font-size: 2rem;
}

.new-record-badge {
    display: inline-block;
    padding: 6px 20px;
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.2), rgba(251, 191, 36, 0.1));
    color: #fbbf24;
    border: 1px solid rgba(245, 158, 11, 0.4);
    border-radius: 20px;
    font-weight: 700;
    font-size: 0.9rem;
    margin-bottom: 20px;
    animation: record-glow 1.5s ease-in-out infinite;
}

@keyframes record-glow {
    0%, 100% { box-shadow: 0 0 8px rgba(245, 158, 11, 0.3); }
    50% { box-shadow: 0 0 16px rgba(245, 158, 11, 0.5); }
}

/* ========== 排行榜 ========== */
.rank-page {
    padding: 0 4px;
}

.champion-banner {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.12), rgba(251, 191, 36, 0.06));
    border: 1px solid rgba(245, 158, 11, 0.25);
    border-radius: 14px;
    margin-bottom: 16px;
}

.champion-trophy {
    font-size: 2rem;
    color: #fbbf24;
}

.champion-text { flex: 1; }

.champion-title {
    font-size: 0.75rem;
    color: #f59e0b;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.champion-name {
    font-size: 1.1rem;
    font-weight: 700;
    color: #e2e8f0;
}

.champion-score {
    font-size: 0.85rem;
    color: #fbbf24;
    font-weight: 600;
}

.rank-period-tabs {
    display: flex;
    gap: 6px;
    margin-bottom: 16px;
}

.rank-period-btn {
    flex: 1;
    padding: 8px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: transparent;
    color: #94a3b8;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.2s;
}

.rank-period-btn:hover { border-color: rgba(255, 255, 255, 0.2); color: #e2e8f0; }

.rank-period-btn.active {
    background: rgba(245, 158, 11, 0.12);
    border-color: rgba(245, 158, 11, 0.3);
    color: #fbbf24;
}

.rank-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.rank-header, .rank-item {
    display: grid;
    grid-template-columns: 50px 1fr 60px 60px;
    align-items: center;
    padding: 10px 12px;
    border-radius: 8px;
}

.rank-header {
    font-size: 0.78rem;
    color: #64748b;
    font-weight: 600;
    margin-bottom: 4px;
}

.rank-item {
    background: rgba(30, 41, 59, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.04);
    transition: all 0.2s;
}

.rank-item:hover {
    background: rgba(30, 41, 59, 0.4);
}

.rank-me {
    border-color: rgba(99, 102, 241, 0.3);
    background: rgba(99, 102, 241, 0.08);
}

.rank-position {
    text-align: center;
    font-weight: 700;
    color: #94a3b8;
    font-size: 0.9rem;
}

.rank-position.rank-top {
    color: #fbbf24;
}

.rank-name {
    font-weight: 500;
    color: #cbd5e1;
    font-size: 0.9rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.rank-company {
    text-align: center;
    font-size: 0.78rem;
    color: #64748b;
}

.rank-score {
    text-align: right;
    font-weight: 700;
    color: #a5b4fc;
    font-size: 0.9rem;
}

.rank-item.rank-1 { border-left: 3px solid #fbbf24; }
.rank-item.rank-2 { border-left: 3px solid #94a3b8; }
.rank-item.rank-3 { border-left: 3px solid #cd7f32; }

/* ========== 响应式 ========== */
@media (max-width: 640px) {
    .stage-grid {
        grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
        gap: 6px;
    }
    .stage-card { padding: 10px 4px; min-height: 70px; }
    .stage-number { font-size: 0.9rem; }
    .stage-name { font-size: 0.6rem; max-width: 60px; }
    .card-indo { font-size: 1.4rem; }
    .quiz-indo { font-size: 1.2rem; }
    .champion-name { font-size: 0.95rem; }
}


/* ========== 课程页顶部Tab（勤学苦练/闯天关） ========== */
.course-top-tabs {
    display: flex;
    gap: 6px;
    margin-bottom: 16px;
    background: rgba(30, 41, 59, 0.5);
    border-radius: 12px;
    padding: 4px;
}

.course-tab {
    flex: 1;
    padding: 10px 16px;
    border: none;
    background: transparent;
    color: #94a3b8;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.25s ease;
}

.course-tab:hover {
    color: #e2e8f0;
    background: rgba(99, 102, 241, 0.08);
}

.course-tab.active {
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    color: #fff;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}


/* ========== 主页样式 ========== */
.home-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - 220px);
    padding: 40px 20px;
    animation: homeFadeIn 0.6s ease;
}

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

.home-hero {
    text-align: center;
    margin-bottom: 60px;
}

.home-title {
    font-size: 3.6rem;
    font-weight: 800;
    background: linear-gradient(135deg, #6366f1, #a78bfa, #f59e0b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
    letter-spacing: -1px;
}

.home-subtitle {
    font-size: 1.3rem;
    color: #64748b;
    font-weight: 400;
    letter-spacing: 2px;
}

.home-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    max-width: 800px;
    width: 100%;
}

.home-card {
    background: var(--glass);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 24px;
    padding: 48px 32px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.home-card:hover {
    transform: translateY(-4px);
    border-color: rgba(255, 255, 255, 0.15);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.home-card-icon {
    width: 96px;
    height: 96px;
    border-radius: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.4rem;
    color: #fff;
    margin-bottom: 18px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.25);
}

.home-card-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: #e2e8f0;
    margin-bottom: 8px;
}

.home-card-desc {
    font-size: 0.92rem;
    color: #64748b;
    line-height: 1.5;
}

.home-card-arrow {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: rgba(255, 255, 255, 0.15);
    font-size: 1.4rem;
    transition: all 0.3s ease;
}

.home-card:hover .home-card-arrow {
    color: rgba(255, 255, 255, 0.4);
    transform: translateY(-50%) translateX(3px);
}

/* ========== 闯天关答题控制区 ========== */
.challenge-controls {
    display: flex;
    gap: 20px;
    margin-top: 16px;
    padding: 16px 20px;
    background: rgba(30, 41, 59, 0.3);
    border-radius: 14px;
    border: 1px solid rgba(255, 255, 255, 0.04);
}

.challenge-controls .vslider-box {
    flex: 1;
    min-width: 0;
}

.challenge-controls .vslider-label {
    font-size: 0.78rem;
    color: #94a3b8;
    margin-bottom: 6px;
}

.challenge-controls .vslider-range {
    font-size: 0.7rem;
}

/* 闯天关滑块需要独立ID避免与主页面滑块冲突 */
#ch-rate-slider,
#ch-loop-slider {
    position: absolute;
    width: 100%;
    height: 100%;
    -webkit-appearance: none;
    appearance: none;
    background: transparent;
    pointer-events: none;
    z-index: 2;
    margin: 0;
}

@media (max-width: 640px) {
    .challenge-controls { flex-direction: column; gap: 12px; }
}

/* 返回主页按钮 */
.back-home-btn:hover {
    color: var(--text-main);
    background: var(--accent-subtle) !important;
}
/* 主页用户状态栏 */
.home-user-bar {
    position: absolute;
    top: 16px;
    right: 24px;
    z-index: 100;
}