* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Helvetica Neue', 'Segoe UI', 'Microsoft YaHei', sans-serif;
}

body {
    background: linear-gradient(135deg, #f5f5f7 0%, #e8e8ed 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    color: #1d1d1f;
    animation: gentleGradientShift 20s ease-in-out infinite;
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Helvetica Neue', 'Segoe UI', 'Microsoft YaHei', sans-serif;
}

@keyframes gentleGradientShift {
    0%, 100% { 
        background: linear-gradient(135deg, #f5f5f7 0%, #e8e8ed 100%); 
    }
    33% { 
        background: linear-gradient(135deg, #e8e8ed 0%, #fbfbfd 100%); 
    }
    66% { 
        background: linear-gradient(135deg, #fbfbfd 0%, #f5f5f7 100%); 
    }
}

.quiz-container {
    width: 100%;
    max-width: 900px;
    background: #fafffe;
    border-radius: 18px;
    box-shadow: 
        0 4px 6px rgba(0, 0, 0, 0.07),
        0 10px 20px rgba(0, 0, 0, 0.05),
        0 2px 4px rgba(0, 0, 0, 0.04);
    overflow: hidden;
    border: 0.5px solid rgba(0, 0, 0, 0.04);
    animation: containerFloat 8s ease-in-out infinite;
    position: relative;
}

@keyframes containerFloat {
    0%, 100% { 
        transform: translateY(0px); 
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.07), 0 10px 20px rgba(0, 0, 0, 0.05);
    }
    50% { 
        transform: translateY(-4px);
        box-shadow: 0 8px 12px rgba(0, 0, 0, 0.08), 0 20px 40px rgba(0, 0, 0, 0.06);
    }
}

.quiz-container::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 120px;
    height: 120px;
    background: radial-gradient(circle, rgba(0, 122, 255, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    z-index: 0;
    animation: decorFloat 6s ease-in-out infinite;
}

.quiz-container::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 150px;
    height: 150px;
    background: radial-gradient(circle, rgba(88, 86, 214, 0.06) 0%, transparent 70%);
    border-radius: 50%;
    z-index: 0;
    animation: decorFloat 8s ease-in-out infinite 2s;
}

@keyframes decorFloat {
    0%, 100% { 
        transform: translate(0, 0) scale(1);
        opacity: 1;
    }
    50% { 
        transform: translate(5px, -5px) scale(1.05);
        opacity: 0.8;
    }
}

header {
    background: linear-gradient(135deg, #007AFF 0%, #0061f5 100%);
    color: #ffffff;
    padding: 32px 28px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 14px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.1rem;
    font-weight: 600;
    opacity: 0.95;
    flex-wrap: wrap;
    gap: 10px;
}

.timer {
    display: flex;
    align-items: center;
    gap: 5px;
}

.timer.warning {
    color: #ffeb3b;
    animation: timerPulse 1s ease-in-out infinite;
}

.timer.danger {
    color: #ff5252;
    animation: timerPulse 0.5s ease-in-out infinite;
}

@keyframes timerPulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.7; transform: scale(1.1); }
}

.screen {
    display: none;
    padding: 35px 30px;
    min-height: 550px;
    animation: screenSlideIn 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    position: relative;
    z-index: 1;
}

@keyframes screenSlideIn {
    from { 
        opacity: 0;
        transform: translateY(30px) scale(0.98);
    }
    to { 
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.screen.active {
    display: block;
}

.start-content {
    text-align: center;
    padding: 20px;
}

.start-content h2 {
    color: #5856D6;
    margin-bottom: 20px;
    font-size: 2.2rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.start-content p {
    color: #6e6e73;
    margin-bottom: 35px;
    font-size: 1.15rem;
    line-height: 1.7;
}

.quiz-info {
    list-style: none;
    margin: 30px 0;
    text-align: left;
    display: inline-block;
    background: linear-gradient(135deg, #F5F1f7 0%, #eFefeC 100%);
    padding: 28px 32px;
    border-radius: 16px;
    border: 1px solid rgba(88, 86, 214, 0.15);
    animation: infoSlideUp 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    box-shadow: 0 2px 8px rgba(88, 86, 214, 0.1);
}

@keyframes infoSlideUp {
    from {
        opacity: 0;
        transform: translateY(40px) rotateX(-10deg);
    }
    to {
        opacity: 1;
        transform: translateY(0) rotateX(0deg);
    }
}

.quiz-info li {
    margin: 15px 0;
    font-size: 1.15rem;
    color: #5856D6;
    animation: listItemStagger 0.6s ease-out;
    animation-fill-mode: both;
    padding: 8px 0;
    border-bottom: 1px solid rgba(88, 86, 214, 0.1);
}

.quiz-info li:last-child {
    border-bottom: none;
}

.quiz-info li:nth-child(1) { animation-delay: 0.1s; }
.quiz-info li:nth-child(2) { animation-delay: 0.2s; }
.quiz-info li:nth-child(3) { animation-delay: 0.3s; }
.quiz-info li:nth-child(4) { animation-delay: 0.4s; }
.quiz-info li:nth-child(5) { animation-delay: 0.5s; }

@keyframes listItemStagger {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.timer-option {
    margin: 25px 0;
    padding: 16px 20px;
    background: linear-gradient(135deg, #F5F4FF 0%, #EFEEFC 100%);
    border-radius: 12px;
    text-align: left;
    display: inline-block;
    border: 1px solid rgba(88, 86, 214, 0.15);
}

.timer-option label {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.05rem;
    color: #5856D6;
    cursor: pointer;
    font-weight: 500;
}

.timer-option input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.question-container {
    margin-bottom: 35px;
    animation: questionReveal 0.9s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

@keyframes questionReveal {
    from {
        opacity: 0;
        transform: scale(0.95) rotateY(-10deg);
    }
    to {
        opacity: 1;
        transform: scale(1) rotateY(0deg);
    }
}

.question-header {
    margin-bottom: 30px;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 15px;
    flex-wrap: wrap;
}

.btn-mark {
    padding: 10px 20px;
    border: 1.5px solid #FF9500;
    background: transparent;
    color: #FF9500;
    border-radius: 10px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.btn-mark:hover {
    background: #FF9500;
    color: white;
    transform: scale(1.03);
}

.btn-mark.marked {
    background: linear-gradient(135deg, #FF9500 0%, #FF6B00 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(255, 149, 0, 0.3);
}

#question-text {
    font-size: 1.5rem;
    line-height: 1.7;
    color: #1d1d1f;
    margin-bottom: 25px;
    padding: 24px 28px;
    background: linear-gradient(135deg, #E0F7FA 0%, #E1F5FE 100%);
    border-radius: 16px;
    border: 1px solid rgba(0, 188, 212, 0.15);
    animation: textFocus 4s ease-in-out infinite;
    box-shadow: 0 2px 8px rgba(0, 188, 212, 0.1);
    font-weight: 600;
}

@keyframes textFocus {
    0%, 100% { 
        box-shadow: 0 2px 8px rgba(0, 188, 212, 0.1);
        border-color: rgba(0, 188, 212, 0.15);
    }
    50% { 
        box-shadow: 0 4px 12px rgba(0, 188, 212, 0.15);
        border-color: rgba(0, 188, 212, 0.25);
    }
}

.options-container {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.option {
    padding: 18px 24px;
    border: 1.5px solid rgba(0, 0, 0, 0.08);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    font-size: 1.1rem;
    background: #ffffff;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.option::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 188, 212, 0.08), transparent);
    transition: left 0.8s;
}

.option:hover::before {
    left: 100%;
}

.option:hover {
    border-color: #00BCD4;
    background: #E0F7FA;
    transform: translateY(-2px) scale(1.01);
    box-shadow: 0 4px 12px rgba(0, 188, 212, 0.15);
}

.option.selected {
    border-color: #00BCD4;
    background: linear-gradient(135deg, #E0F7FA 0%, #E1F5FE 100%);
    font-weight: 600;
    animation: selectPulse 0.6s ease-out;
}

@keyframes selectPulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.option.correct {
    border-color: #4caf50;
    background: #e8f5e9;
    animation: correctBounce 0.8s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes correctBounce {
    0%, 20%, 60%, 100% { transform: translateY(0); }
    40% { transform: translateY(-12px); }
    80% { transform: translateY(-6px); }
}

.option.incorrect {
    border-color: #f44336;
    background: #ffebee;
    animation: incorrectShake 0.7s ease-out;
}

@keyframes incorrectShake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-8px); }
    75% { transform: translateX(8px); }
}

.option-letter {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, #00BCD4 0%, #0097A7 100%);
    color: white;
    border-radius: 50%;
    margin-right: 18px;
    font-weight: bold;
    animation: letterBounce 4s ease-in-out infinite;
    box-shadow: 0 2px 6px rgba(0, 188, 212, 0.3);
}

@keyframes letterBounce {
    0%, 100% { 
        transform: translateY(0) rotate(0deg);
    }
    50% { 
        transform: translateY(-4px) rotate(5deg);
    }
}

.navigation {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    margin-top: 35px;
}

.btn {
    padding: 16px 32px;
    border: none;
    border-radius: 12px;
    font-size: 1.05rem;
    cursor: pointer;
    transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    letter-spacing: -0.2px;
}

.btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:active::after {
    width: 300px;
    height: 300px;
}

.btn.primary {
    background: linear-gradient(135deg, #007AFF 0%, #0051D5 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(0, 122, 255, 0.3);
}

.btn.primary:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 8px 20px rgba(0, 122, 255, 0.35);
    animation: btnGlow 2s ease-in-out infinite;
}

@keyframes btnGlow {
    0%, 100% { 
        box-shadow: 0 4px 12px rgba(0, 122, 255, 0.3);
    }
    50% { 
        box-shadow: 0 8px 20px rgba(0, 122, 255, 0.4);
    }
}

.btn.secondary {
    background: #f5f5f7;
    color: #1d1d1f;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.btn.secondary:hover {
    background: #e8e8ed;
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.btn.success {
    background: linear-gradient(135deg, #34C759 0%, #30A14E 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(52, 199, 89, 0.3);
}

.btn.success:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 8px 20px rgba(52, 199, 89, 0.35);
}

/* 答案与解析部分 - Apple橙色主题 */
.answer-explanation {
    margin-top: 30px;
    padding: 28px 32px;
    border-radius: 16px;
    background: linear-gradient(135deg, #FFF3E0 0%, #FFE9D6 100%);
    border: 1px solid rgba(255, 149, 0, 0.2);
    animation: explanationReveal 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    box-shadow: 0 2px 8px rgba(255, 149, 0, 0.15);
    position: relative;
    overflow: hidden;
}

.answer-explanation::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #FF9500, #FF6B00, #FF9500);
}

@keyframes explanationReveal {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.answer-explanation h3 {
    color: #FF9500;
    margin-bottom: 20px;
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: -0.3px;
}

.answer-feedback {
    margin-top: 20px;
}

.answer-feedback p {
    margin-bottom: 12px;
    line-height: 1.7;
    font-size: 1.1rem;
    color: #3a3a3c;
}

#correct-indicator {
    font-weight: bold;
    font-size: 1.3rem;
    margin-bottom: 15px;
    animation: fadeInUp 0.8s ease-out;
    /* 移除了padding, border-radius和display属性，让文字自然显示 */
}

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

/* 修复：去除背景色和边框，只保留文字颜色 */
#correct-indicator.correct {
    color: #4caf50; /* 只保留绿色文字 */
    background-color: transparent; /* 去除背景色 */
    border: none; /* 去除边框 */
}

#correct-indicator.incorrect {
    color: #f44336; /* 只保留红色文字 */
    background-color: transparent; /* 去除背景色 */
    border: none; /* 去除边框 */
}

.hidden {
    display: none;
}

.results-content {
    text-align: center;
    animation: resultsCelebrate 1s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

@keyframes resultsCelebrate {
    from {
        opacity: 0;
        transform: scale(0.8) rotate(-5deg);
    }
    to {
        opacity: 1;
        transform: scale(1) rotate(0deg);
    }
}

.score-summary {
    margin: 35px 0;
}

.score-circle {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: linear-gradient(135deg, #FF2D55 0%, #C7004C 100%);
    color: white;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    margin: 0 auto 30px;
    box-shadow: 0 8px 20px rgba(255, 45, 85, 0.3);
    position: relative;
}

.score-circle::before {
    content: '';
    position: absolute;
    top: -8px;
    left: -8px;
    right: -8px;
    bottom: -8px;
    border-radius: 50%;
    background: linear-gradient(135deg, #FF2D55, #FF375F, #FF6482);
    z-index: -1;
    animation: scoreRotate 6s linear infinite;
    opacity: 0.5;
}

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

.score-circle span {
    font-size: 4rem;
    font-weight: bold;
    line-height: 1;
}

.score-circle small {
    font-size: 1.3rem;
    margin-top: 8px;
    opacity: 0.9;
}

.donation-section {
    margin: 45px 0;
    padding: 32px;
    background: linear-gradient(135deg, #FFF0F5 0%, #FFE4E9 100%);
    border-radius: 16px;
    border: 1px solid rgba(255, 45, 85, 0.2);
    text-align: center;
    animation: donationFloat 4s ease-in-out infinite;
}

@keyframes donationFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-6px); }
}

.donation-text {
    font-size: 1.2rem;
    line-height: 1.7;
    margin-bottom: 25px;
    color: #3a3a3c;
}

.qr-code {
    max-width: 280px;
    margin: 0 auto;
    border: 2px solid #FF2D55;
    border-radius: 16px;
    padding: 16px;
    background-color: white;
    animation: qrFloat 5s ease-in-out infinite;
    box-shadow: 0 4px 12px rgba(255, 45, 85, 0.15);
}

@keyframes qrFloat {
    0%, 100% { transform: rotate(-1deg); }
    50% { transform: rotate(1deg); }
}

.qr-code img {
    width: 100%;
    height: auto;
    display: block;
}

.action-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-top: 35px;
}

.question-nav-panel {
    margin-top: 35px;
    padding: 28px 32px;
    background: linear-gradient(135deg, #F5F4FF 0%, #EFEEFC 100%);
    border-radius: 16px;
    border: 1px solid rgba(88, 86, 214, 0.15);
}

.question-nav-panel h4 {
    color: #5856D6;
    margin-bottom: 18px;
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: -0.3px;
}

.question-nav-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(50px, 1fr));
    gap: 10px;
}

.question-nav-btn {
    padding: 12px;
    border: 1.5px solid rgba(0, 0, 0, 0.08);
    background: white;
    border-radius: 10px;
    cursor: pointer;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    position: relative;
}

.question-nav-btn:hover {
    background: #E0F7FA;
    transform: scale(1.05);
    border-color: #00BCD4;
}

.question-nav-btn.active {
    background: linear-gradient(135deg, #00BCD4 0%, #0097A7 100%);
    color: white;
    border-color: #00BCD4;
}

.question-nav-btn.answered {
    background: linear-gradient(135deg, #E8F5E9 0%, #D7F0DC 100%);
    border-color: #34C759;
}

.question-nav-btn.marked::after {
    content: '🔖';
    position: absolute;
    top: -8px;
    right: -8px;
    font-size: 0.9rem;
}

.progress-bar-container {
    width: 100%;
    height: 6px;
    background: rgba(0, 0, 0, 0.06);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 25px;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, #00BCD4, #0097A7);
    width: 0%;
    transition: width 0.5s ease;
    border-radius: 3px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .quiz-container {
        margin: 15px;
        border-radius: 15px;
    }
    
    .screen {
        padding: 25px 20px;
    }
    
    header {
        padding: 25px 20px;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    .progress-info {
        font-size: 0.95rem;
        justify-content: center;
    }
    
    .navigation {
        flex-direction: column;
    }
    
    .action-buttons {
        flex-direction: column;
    }
    
    .score-circle {
        width: 180px;
        height: 180px;
    }
    
    .score-circle span {
        font-size: 3.5rem;
    }
    
    .donation-text {
        font-size: 1.15rem;
    }
    
    .option:hover {
        transform: translateY(-2px) scale(1.02);
    }
    
    .btn:hover {
        transform: translateY(-2px) scale(1.03);
    }
    
    .quiz-container::before,
    .quiz-container::after {
        display: none;
    }
    
    .answer-explanation {
        padding: 20px;
        margin-top: 25px;
    }
    
    .answer-explanation h3 {
        font-size: 1.3rem;
    }
    
    .question-header {
        flex-direction: column;
        align-items: stretch;
    }
    
    .btn-mark {
        width: 100%;
    }
    
    #question-text {
        font-size: 1.3rem;
        word-wrap: break-word;
        overflow-wrap: break-word;
    }
    
    .question-nav-buttons {
        grid-template-columns: repeat(auto-fill, minmax(45px, 1fr));
    }
}

/* 模态框样式 */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.3s ease;
    backdrop-filter: blur(5px);
}

.modal.active {
    display: flex;
    justify-content: center;
    align-items: center;
}

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

.modal-content {
    background: white;
    padding: 40px;
    border-radius: 18px;
    max-width: 500px;
    width: 90%;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.25);
    animation: slideUp 0.4s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-content h3 {
    color: #1d1d1f;
    margin-bottom: 20px;
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: -0.4px;
}

.modal-content p {
    color: #6e6e73;
    margin-bottom: 30px;
    font-size: 1.1rem;
    line-height: 1.6;
}

.modal-actions {
    display: flex;
    gap: 15px;
    justify-content: flex-end;
}

.modal-actions .btn {
    padding: 12px 28px;
}

/* 通知动画 */
@keyframes slideInRight {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOutRight {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(400px);
        opacity: 0;
    }
}

/* 无障碍功能 - 键盘焦点样式 */
button:focus,
.option:focus {
    outline: 2px solid #007AFF;
    outline-offset: 3px;
}

/* 提升性能 - 硬件加速 */
.option,
.btn,
.quiz-container {
    will-change: transform;
}

/* 打印样式 */
@media print {
    body {
        background: white;
    }
    
    .quiz-container {
        box-shadow: none;
        border: 1px solid #ddd;
    }
    
    .navigation,
    .btn-mark,
    .question-nav-panel,
    header {
        display: none !important;
    }
    
    .answer-explanation {
        page-break-inside: avoid;
    }
}

/* 优化触摸设备体验 */
@media (hover: none) and (pointer: coarse) {
    .option,
    .btn {
        min-height: 48px;
        touch-action: manipulation;
    }
    
    .option:active {
        background: #e3f2fd;
        transform: scale(0.98);
    }
}

/* 减少动画（用户偏好设置） */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* 高对比度模式支持 */
@media (prefers-contrast: high) {
    .option {
        border-width: 3px;
    }
    
    .btn {
        border: 2px solid currentColor;
    }
}