* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #e0f2f1 0%, #b2dfdb 100%);
    min-height: 100vh;
    color: #263238;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    margin-bottom: 40px;
    padding: 40px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 4px;
    box-shadow: 0 8px 24px rgba(0, 77, 64, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(178, 223, 219, 0.3);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.title-section {
    flex: 1;
    text-align: center;
}

.language-switcher {
    position: relative;
    display: flex;
    align-items: center;
}

main {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

header h1 {
    font-size: 3rem;
    color: #00695c;
    margin-bottom: 15px;
    font-weight: 700;
    text-shadow: 2px 2px 4px rgba(0, 105, 92, 0.1);
}

header p {
    font-size: 1.1rem;
    color: #546e7a;
}

main {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

section {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 4px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: 0 4px 16px rgba(0, 77, 64, 0.1);
    border: 1px solid rgba(178, 223, 219, 0.3);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
    animation: fadeInUp 0.6s ease-out;
}

section:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

section h2 {
    color: #00695c;
    margin-bottom: 30px;
    font-size: 2rem;
    border-bottom: 4px solid #26a69a;
    padding-bottom: 15px;
    font-weight: 600;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #00695c;
}

.form-group input {
    width: 100%;
    padding: 15px 20px;
    border: 2px solid #b2dfdb;
    border-radius: 4px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: #f1f8e9;
    box-shadow: 0 2px 8px rgba(0, 77, 64, 0.05);
}

.form-group input:focus {
    outline: none;
    border-color: #26a69a;
    background: white;
    box-shadow: 0 0 0 4px rgba(38, 166, 154, 0.15);
    transform: translateY(-2px);
}

.rooms-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
    margin-bottom: 30px;
}

.room-card {
    background: linear-gradient(135deg, #e8f5e8 0%, #c8e6c9 100%);
    border-radius: 4px;
    padding: 30px;
    border: 2px solid #b2dfdb;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.room-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #26a69a, #00695c);
}

.room-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 24px rgba(38, 166, 154, 0.2);
    border-color: #26a69a;
}

.room-card h3 {
    color: #00695c;
    margin-bottom: 20px;
    text-align: center;
    font-size: 1.4rem;
}

.bid-inputs {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.bid-input {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.bid-input label {
    font-weight: 600;
    color: #00695c;
    font-size: 0.9rem;
}

.bid-input input {
    padding: 10px 12px;
    border: 2px solid #b2dfdb;
    border-radius: 4px;
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.bid-input input:focus {
    outline: none;
    border-color: #26a69a;
    box-shadow: 0 0 0 3px rgba(38, 166, 154, 0.15);
    transform: translateY(-2px);
}

.calculate-btn {
    background: linear-gradient(135deg, #26a69a 0%, #00695c 100%);
    color: white;
    border: none;
    padding: 18px 50px;
    font-size: 1.2rem;
    font-weight: 700;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 8px 25px rgba(38, 166, 154, 0.3);
    width: 100%;
    max-width: 350px;
    margin: 0 auto;
    display: block;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.calculate-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 35px rgba(38, 166, 154, 0.4);
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin-bottom: 30px;
}

.result-card {
    background: #f1f8e9;
    border-radius: 4px;
    padding: 25px;
    border: 2px solid #b2dfdb;
}

.result-card h3 {
    color: #00695c;
    margin-bottom: 20px;
    text-align: center;
    font-size: 1.3rem;
}

.result-card.allocation {
    border-left: 5px solid #26a69a;
}

.result-card.rents {
    border-left: 5px solid #00897b;
}

.result-card.summary {
    border-left: 5px solid #4dd0e1;
}

.allocation-item, .rent-item, .summary-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid #b2dfdb;
}

.allocation-item:last-child, .rent-item:last-child, .summary-item:last-child {
    border-bottom: none;
}

.allocation-item .room {
    font-weight: 600;
    color: #00695c;
}

.allocation-item .person {
    color: #26a69a;
    font-weight: 600;
}

.rent-item .room {
    font-weight: 600;
    color: #00695c;
}

.rent-item .amount {
    color: #00897b;
    font-weight: 600;
    font-size: 1.1rem;
}

.summary-item .label {
    color: #00695c;
}

.summary-item .value {
    font-weight: 600;
    color: #4dd0e1;
}

.chart-container {
    background: white;
    border-radius: 4px;
    padding: 30px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    height: 500px;
    position: relative;
}

.chart-container:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.15);
}

.chart-container canvas {
    width: 100% !important;
    height: 420px !important;
    max-height: none !important;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    header {
        padding: 25px;
        margin-bottom: 30px;
    }
    
    header h1 {
        font-size: 2.2rem;
    }
    
    .rooms-container {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .results-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    section {
        padding: 25px;
    }
    
    .calculate-btn {
        padding: 15px 40px;
        font-size: 1.1rem;
    }
}

/* 加载动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

section {
    animation: fadeInUp 0.6s ease-out;
}

.room-card {
    animation: fadeInUp 0.6s ease-out;
    animation-delay: 0.1s;
    animation-fill-mode: both;
}

.room-card:nth-child(2) {
    animation-delay: 0.2s;
}

.room-card:nth-child(3) {
    animation-delay: 0.3s;
}

/* 输入框聚焦动画 */
.bid-input input:focus {
    outline: none;
    border-color: #26a69a;
    box-shadow: 0 0 0 3px rgba(38, 166, 154, 0.15);
    transform: translateY(-2px);
}

/* 结果卡片动画 */
.result-card {
    animation: fadeInUp 0.6s ease-out;
    animation-delay: 0.4s;
    animation-fill-mode: both;
}

.result-card:nth-child(2) {
    animation-delay: 0.5s;
}

.result-card:nth-child(3) {
    animation-delay: 0.6s;
}

/* 新增样式 */
.person-input {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
}

.person-input input {
    flex: 1;
    padding: 12px 16px;
    border: 2px solid #b2dfdb;
    border-radius: 4px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: #f1f8e9;
}

.person-input input:focus {
    outline: none;
    border-color: #26a69a;
    background: white;
    box-shadow: 0 0 0 3px rgba(38, 166, 154, 0.15);
}

.remove-person-btn, .remove-room-btn {
    background: #e74c3c;
    color: white;
    border: none;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 18px;
    font-weight: bold;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.remove-person-btn:hover, .remove-room-btn:hover {
    background: #c0392b;
    transform: scale(1.1);
}

.add-btn {
    background: linear-gradient(135deg, #00897b 0%, #004d40 100%);
    color: white;
    border: none;
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 137, 123, 0.3);
    margin-bottom: 20px;
}

.add-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 137, 123, 0.4);
}

.room-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.room-header h3 {
    margin: 0;
}

.action-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}

.action-buttons .add-btn {
    margin-bottom: 0;
}

/* 最小房间和人员数量限制 */
.room-card:only-child .remove-room-btn,
.person-input:only-child .remove-person-btn {
    display: none !important;
}

/* 算法信息和解释区域样式 */
.algorithm-info {
    background: linear-gradient(135deg, #26a69a 0%, #00695c 100%);
    color: white;
    border-radius: 4px;
    padding: 25px;
    margin-bottom: 30px;
    box-shadow: 0 8px 25px rgba(38, 166, 154, 0.3);
}

.algorithm-info h3 {
    color: white;
    margin-bottom: 15px;
    font-size: 1.4rem;
}

.algorithm-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.algorithm-item {
    background: rgba(255, 255, 255, 0.1);
    padding: 15px;
    border-radius: 4px;
    border-left: 4px solid rgba(255, 255, 255, 0.5);
}

.algorithm-item strong {
    display: block;
    margin-bottom: 8px;
    font-size: 1.1rem;
}

.algorithm-stages {
    margin-top: 15px;
}

.algorithm-stages ul {
    list-style: none;
    padding: 0;
}

.algorithm-stages li {
    background: rgba(255, 255, 255, 0.1);
    margin: 5px 0;
    padding: 8px 12px;
    border-radius: 5px;
    font-size: 0.9rem;
}

.explanation-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 25px;
    margin-bottom: 30px;
}

.explanation-card {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 4px;
    padding: 25px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    border-left: 5px solid #26a69a;
}

.explanation-card h3 {
    color: #00695c;
    margin-bottom: 20px;
    font-size: 1.3rem;
}

.explanation-item {
    background: #f1f8e9;
    padding: 15px;
    margin-bottom: 15px;
    border-radius: 4px;
    border-left: 3px solid #26a69a;
}

.explanation-item:last-child {
    margin-bottom: 0;
}

.explanation-item .step {
    font-weight: 600;
    color: #26a69a;
    margin-bottom: 5px;
}

.explanation-item .detail {
    color: #00695c;
    font-size: 0.95rem;
    line-height: 1.4;
}

.result-card.fairness {
    border-left: 5px solid #0097a7;
}

.fairness-metric {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid #b2dfdb;
}

.fairness-metric:last-child {
    border-bottom: none;
}

.fairness-metric .label {
    color: #00695c;
    font-weight: 500;
}

.fairness-metric .value {
    font-weight: 600;
    color: #0097a7;
}

.satisfaction-bar {
    background: #b2dfdb;
    height: 8px;
    border-radius: 4px;
    overflow: hidden;
    margin: 5px 0;
}

.satisfaction-fill {
    height: 100%;
    background: linear-gradient(90deg, #e74c3c, #f39c12, #27ae60);
    border-radius: 4px;
    transition: width 0.3s ease;
}

.overall-fairness {
    background: linear-gradient(135deg, #0097a7 0%, #006064 100%);
    color: white;
    padding: 15px;
    border-radius: 4px;
    text-align: center;
    margin-top: 15px;
}

.overall-fairness .score {
    font-size: 2rem;
    font-weight: bold;
    margin-bottom: 5px;
}

.overall-fairness .label {
    font-size: 0.9rem;
    opacity: 0.9;
}

/* 响应式设计更新 */
@media (max-width: 768px) {
    .explanation-section {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .algorithm-details {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .explanation-card {
        padding: 20px;
    }
    
    .header-content {
        flex-direction: column;
        text-align: center;
    }
    
    .language-switcher {
        margin-top: 20px;
    }
}

/* 语言切换样式 */
.lang-btn {
    background: #26a69a;
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(38, 166, 154, 0.2);
    min-width: 120px;
}

.lang-btn:hover {
    background: #00695c;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(38, 166, 154, 0.3);
}

.lang-icon {
    font-size: 1.1rem;
}

.lang-arrow {
    font-size: 0.8rem;
    transition: transform 0.3s ease;
}

.lang-btn.active .lang-arrow {
    transform: rotate(180deg);
}

.lang-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background: white;
    border-radius: 4px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1000;
    min-width: 160px;
    margin-top: 8px;
    border: 1px solid rgba(38, 166, 154, 0.2);
}

.lang-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-option {
    padding: 12px 16px;
    cursor: pointer;
    transition: all 0.3s ease;
    color: #00695c;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
}

.lang-option:hover {
    background: #26a69a;
    color: white;
}

.lang-option.active {
    background: #e0f2f1;
    color: #26a69a;
    font-weight: 600;
}

/* 界面优化 */
.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin-bottom: 30px;
}

.result-card {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 4px;
    padding: 25px;
    border: 2px solid #b2dfdb;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

.result-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
}

.result-card h3 {
    color: #00695c;
    margin-bottom: 20px;
    text-align: center;
    font-size: 1.3rem;
    font-weight: 600;
}

/* 改进的动画效果 */
.room-card {
    background: linear-gradient(135deg, #f1f8e9 0%, #e9ecef 100%);
    border-radius: 4px;
    padding: 30px;
    border: 2px solid #b2dfdb;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
}

.room-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #26a69a, #00695c);
}

.room-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 40px rgba(38, 166, 154, 0.2);
    border-color: #26a69a;
}

/* 改进的满意度显示 */
.satisfaction-bar {
    background: #b2dfdb;
    height: 12px;
    border-radius: 6px;
    overflow: hidden;
    margin: 8px 0;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

.satisfaction-fill {
    height: 100%;
    background: linear-gradient(90deg, #e74c3c 0%, #f39c12 50%, #27ae60 100%);
    border-radius: 6px;
    transition: width 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    position: relative;
}

.satisfaction-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to right, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* Fluent UI 按钮样式增强 */
fluent-button {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    transition: all 0.3s ease;
    border-radius: 4px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

fluent-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

fluent-button[appearance="accent"] {
    background: #26a69a;
    color: white;
}

fluent-button[appearance="outline"] {
    border: 2px solid #26a69a;
    color: #26a69a;
    background: transparent;
}

fluent-button[appearance="outline"]:hover {
    background: #26a69a;
    color: white;
}

/* PDF导出区域样式 */
.export-section {
    margin-top: 30px;
    text-align: center;
    padding: 20px;
    background: #f1f8e9;
    border-radius: 4px;
    border: 2px dashed #26a69a;
}

.export-btn {
    min-width: 200px;
    height: 48px;
    font-size: 16px;
    font-weight: 600;
}

.export-icon {
    font-size: 18px;
    margin-right: 8px;
}

/* 输入框增强样式 */
input[type="text"], input[type="number"] {
    border: 2px solid #b2dfdb;
    border-radius: 4px;
    padding: 12px 16px;
    font-size: 14px;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.9);
}

input[type="text"]:focus, input[type="number"]:focus {
    border-color: #26a69a;
    box-shadow: 0 0 0 3px rgba(38, 166, 154, 0.1);
    outline: none;
    background: white;
}

/* 移除按钮样式增强 */
.remove-person-btn, .remove-room-btn {
    background: linear-gradient(135deg, #e74c3c 0%, #c0392b 100%);
    color: white;
    border: none;
    border-radius: 50%;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 14px;
    font-weight: bold;
    transition: all 0.3s ease;
    box-shadow: 0 2px 6px rgba(231, 76, 60, 0.3);
}

.remove-person-btn:hover, .remove-room-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(231, 76, 60, 0.5);
}

/* 标签样式增强 */
label {
    font-weight: 600;
    color: #00695c;
    margin-bottom: 8px;
    display: block;
    font-size: 14px;
}