* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
}

body {
    background-color: #f8f9fa;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    background-image: linear-gradient(135deg, #f0f8ff 0%, #e4edf5 100%);
}

.container {
    max-width: 900px;
    width: 100%;
    background-color: white;
    border-radius: 15px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.header {
    background: linear-gradient(to right, #2c3e50, #4a90e2);
    color: white;
    padding: 30px;
    text-align: center;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
}

.tab-container {
    display: flex;
    background-color: #f1f5f9;
    border-bottom: 1px solid #e2e8f0;
}

.tab {
    flex: 1;
    padding: 20px;
    text-align: center;
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: 600;
    color: #64748b;
    transition: all 0.3s ease;
    border-bottom: 3px solid transparent;
}

/* 支持创作者样式 */
.support-section {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.qr-code-container {
    margin: 30px auto;
    max-width: 280px;
    padding: 15px;
    background: white;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    border: 1px solid #f0f0f0;
    transition: transform 0.3s ease;
}

.qr-code-container:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.12);
}

.qr-code {
    width: 100%;
    height: auto;
    border-radius: 12px;
    display: block;
}

.support-text {
    font-size: 1.1rem;
    color: #4b5563;
    line-height: 1.8;
    margin-bottom: 25px;
}

.support-text p {
    margin-bottom: 15px;
}

.wechat-badge {
    display: inline-flex;
    align-items: center;
    padding: 8px 16px;
    background-color: #f0fdf4;
    color: #16a34a;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.95rem;
    margin-top: 15px;
}

.tab.active {
    color: #2c3e50;
    background-color: white;
    border-bottom: 3px solid #2c3e50;
}

.tab:hover:not(.active) {
    background-color: #e8f0fe;
    color: #4a90e2;
}

.content-area {
    padding: 30px;
    min-height: 500px;
}

.tab-content {
    display: none;
    animation: fadeIn 0.5s ease;
}

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

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

/* 建议页面样式 */
.suggestion-section {
    max-width: 700px;
    margin: 0 auto;
}

.author-note {
    background-color: #f8f9fa;
    padding: 15px;
    border-radius: 8px;
    border-left: 4px solid #3498db;
    margin-bottom: 25px;
    font-style: italic;
    color: #555;
}

.form-group {
    margin-bottom: 25px;
}

label {
    display: block;
    margin-bottom: 8px;
    color: #2c3e50;
    font-weight: 500;
}

.suggestion-input, .suggestion-textarea {
    width: 100%;
    padding: 14px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 16px;
    transition: border 0.3s;
}

.suggestion-input:focus, .suggestion-textarea:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
}

.suggestion-textarea {
    min-height: 200px;
    resize: vertical;
}

.required::after {
    content: " *";
    color: #e74c3c;
}

.submit-btn {
    background: linear-gradient(to right, #2c3e50, #4a90e2);
    color: white;
    border: none;
    padding: 18px;
    font-size: 1.2rem;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
    font-weight: 600;
    margin-top: 10px;
}

.submit-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 7px 15px rgba(44, 62, 80, 0.3);
}

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

.submit-btn:disabled {
    background: #cccccc;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.counter {
    text-align: right;
    font-size: 14px;
    color: #7f8c8d;
    margin-top: 5px;
}

.suggestion-thank-you {
    text-align: center;
    padding: 30px;
    background-color: white;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    display: none;
    margin-top: 20px;
    animation: fadeIn 0.8s ease;
}

.suggestion-thank-you.show {
    display: block;
}

.suggestion-thank-you h2 {
    color: #27ae60;
    font-size: 2rem;
    margin-bottom: 15px;
}

.signature {
    margin-top: 25px;
    font-style: italic;
    color: #7f8c8d;
    font-size: 1.2rem;
}

.signature .name {
    font-weight: bold;
    color: #2c3e50;
}

/* 评分页面样式 */
.rating-section {
    text-align: center;
}

.instruction {
    text-align: center;
    margin-bottom: 30px;
    color: #333;
    line-height: 1.6;
    font-size: 1.1rem;
}

.highlight {
    color: #2c3e50;
    font-weight: bold;
}

.score-input-container {
    margin-bottom: 30px;
}

.input-label {
    display: block;
    margin-bottom: 15px;
    font-size: 1.3rem;
    color: #2c3e50;
    font-weight: 600;
}

.score-input {
    width: 150px;
    height: 150px;
    font-size: 4rem;
    text-align: center;
    border: 4px solid #ddd;
    border-radius: 15px;
    font-weight: bold;
    color: #2c3e50;
    transition: all 0.3s ease;
    outline: none;
    display: block;
    margin: 0 auto;
    -moz-appearance: textfield;
}

.score-input::-webkit-outer-spin-button,
.score-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.score-input:focus {
    border-color: #2c3e50;
    box-shadow: 0 0 0 3px rgba(44, 62, 80, 0.2);
}

.score-input.correct {
    border-color: #2ecc71;
    background-color: #f9fff9;
    color: #2ecc71;
}

.score-input.wrong {
    border-color: #e74c3c;
    background-color: #fff9f9;
    color: #e74c3c;
    animation: shake 0.5s;
}

@keyframes shake {
    0%, 100% {transform: translateX(0);}
    20%, 60% {transform: translateX(-10px);}
    40%, 80% {transform: translateX(10px);}
}

.rating-message {
    text-align: center;
    margin-top: 15px;
    min-height: 25px;
    font-weight: 600;
    font-size: 1.2rem;
}

.success {
    color: #2ecc71;
}

.error {
    color: #e74c3c;
}

.rating-result {
    margin-top: 30px;
    padding: 20px;
    border-radius: 10px;
    text-align: center;
    background-color: #f8f9fa;
    display: none;
}

.rating-result.show {
    display: block;
}

.result-title {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: #2c3e50;
}

.result-score {
    font-size: 4rem;
    font-weight: bold;
    color: #2ecc71;
    margin-bottom: 10px;
}

.result-text {
    font-size: 1.2rem;
    color: #555;
    line-height: 1.5;
}

.footer {
    text-align: center;
    padding: 20px;
    color: #777;
    font-size: 0.9rem;
    border-top: 1px solid #eee;
    background-color: #f8f9fa;
}

.system-message {
    padding: 12px;
    border-radius: 8px;
    margin-top: 15px;
    border-left: 4px solid;
    display: none;
}

.system-message.show {
    display: block;
}

.error-message {
    color: #e74c3c;
    background-color: #fdf2f2;
    border-color: #e74c3c;
}

.success-message {
    color: #27ae60;
    background-color: #f0f9f0;
    border-color: #27ae60;
}

.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
    margin-right: 10px;
}

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

.icon {
    margin-right: 8px;
    color: #2c3e50;
}

@media (max-width: 768px) {
    .container {
        max-width: 95%;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    .content-area {
        padding: 20px;
    }
    
    .score-input {
        width: 120px;
        height: 120px;
        font-size: 3.5rem;
    }
    
    .tab {
        padding: 15px;
        font-size: 1rem;
    }
}