/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

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

/* 导航栏 */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: #667eea;
}

.nav-logo i {
    margin-right: 10px;
    font-size: 1.8rem;
}

.nav-menu {
    display: flex;
    gap: 30px;
}

.nav-link {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: #667eea;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #667eea;
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

/* 英雄区域 */
.hero {
    padding: 120px 0 80px;
    text-align: center;
    color: white;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.9) 0%, rgba(118, 75, 162, 0.9) 100%);
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    animation: fadeInUp 1s ease;
}

.hero-subtitle {
    font-size: 1.1rem;
    margin-bottom: 40px;
    opacity: 0.9;
    animation: fadeInUp 1s ease 0.2s both;
    line-height: 1.8;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    margin-top: 50px;
    animation: fadeInUp 1s ease 0.4s both;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: #ffd700;
}

.stat-label {
    font-size: 1rem;
    opacity: 0.8;
}

/* 表单区域 */
.application-section {
    padding: 80px 0;
    background: white;
}

.form-container {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    animation: slideInUp 0.8s ease;
}

.form-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 40px;
    text-align: center;
}

.form-header h2 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.form-header p {
    font-size: 1.1rem;
    opacity: 0.9;
}

.application-form {
    padding: 40px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-bottom: 30px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-weight: 600;
    margin-bottom: 8px;
    color: #333;
}

.required {
    color: #e74c3c;
}

.form-group input,
.form-group select {
    padding: 15px;
    border: 2px solid #e1e5e9;
    border-radius: 10px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: #f8f9fa;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: #667eea;
    background: white;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-submit {
    text-align: center;
    margin-top: 40px;
}

.submit-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 15px 40px;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
}

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

/* 服务区域 */
.services-section {
    padding: 80px 0;
    background: #f8f9fa;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
    color: #333;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.service-card {
    background: white;
    padding: 40px;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

.service-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: white;
    font-size: 2rem;
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: #333;
}

.service-card p {
    color: #666;
    line-height: 1.6;
}

/* 提示框 */
.toast {
    position: fixed;
    top: 100px;
    right: 30px;
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    display: none;
    z-index: 1001;
    animation: slideInRight 0.3s ease;
}

.toast.show {
    display: block;
}

.toast-content {
    display: flex;
    align-items: center;
    gap: 10px;
}

.toast-content i {
    color: #27ae60;
    font-size: 1.2rem;
}

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

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0% {
        box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
    }
    50% {
        box-shadow: 0 10px 30px rgba(102, 126, 234, 0.6);
    }
    100% {
        box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 30px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .container {
        padding: 0 15px;
    }
    
    .application-form {
        padding: 30px 20px;
    }
    
    .form-header {
        padding: 30px 20px;
    }
    
    .form-header h2 {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .chat-container {
        width: 280px;
        right: -40px;
    }
    
    .chat-widget {
        bottom: 20px;
        right: 20px;
    }
} 

/* 未读消息指示器 */
.unread-indicator {
    display: inline-block;
    width: 8px;
    height: 8px;
    background-color: #e74c3c;
    border-radius: 50%;
    margin-left: 8px;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.5;
        transform: scale(1.2);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

/* 聊天用户列表样式改进 */
.chat-user {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 15px;
    border-bottom: 1px solid #eee;
    cursor: pointer;
    transition: background-color 0.2s;
}

.chat-user:hover {
    background-color: #f8f9fa;
}

.chat-user.active {
    background-color: #e3f2fd;
    border-left: 3px solid #2196f3;
}

.chat-user-name {
    display: flex;
    align-items: center;
    font-weight: 500;
    color: #333;
}

.chat-user-time {
    font-size: 12px;
    color: #666;
} 

/* 聊天界面样式 */
.chat-widget {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1000;
}

.chat-button {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.4);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.chat-button:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 25px rgba(102, 126, 234, 0.6);
}

.chat-container {
    position: fixed;
    bottom: 90px;
    right: 20px;
    width: 350px;
    height: 500px;
    background: white;
    border-radius: 15px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    display: none;
    flex-direction: column;
    overflow: hidden;
    z-index: 1001;
}

.chat-container.active {
    display: flex;
}

/* 手机端全屏聊天 */
@media (max-width: 768px) {
    .chat-container {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        width: 100%;
        height: 100%;
        border-radius: 0;
        z-index: 10000;
    }
    
    .chat-container.active {
        display: flex;
    }
    
    .chat-header {
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        color: white;
        padding: 20px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        position: relative;
    }
    
    .chat-header h3 {
        margin: 0;
        font-size: 1.2rem;
    }
    
    .close-chat {
        background: rgba(255, 255, 255, 0.2);
        border: none;
        color: white;
        width: 40px;
        height: 40px;
        border-radius: 50%;
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.2rem;
        transition: all 0.3s ease;
    }
    
    .close-chat:hover {
        background: rgba(255, 255, 255, 0.3);
        transform: scale(1.1);
    }
    
    .chat-messages {
        flex: 1;
        padding: 20px;
        overflow-y: auto;
        background: #f8f9fa;
    }
    
    .chat-input {
        padding: 20px;
        background: white;
        border-top: 1px solid #e1e5e9;
        display: flex;
        gap: 10px;
        align-items: center;
    }
    
    .chat-input input {
        flex: 1;
        padding: 15px;
        border: 2px solid #e1e5e9;
        border-radius: 25px;
        font-size: 1rem;
        outline: none;
    }
    
    .chat-input input:focus {
        border-color: #667eea;
    }
    
    .chat-input button {
        width: 50px;
        height: 50px;
        border-radius: 50%;
        background: #667eea;
        border: none;
        color: white;
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.2rem;
        transition: all 0.3s ease;
    }
    
    .chat-input button:hover {
        background: #5a6fd8;
        transform: scale(1.1);
    }
}

/* 桌面端聊天样式 */
@media (min-width: 769px) {
    .chat-header {
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        color: white;
        padding: 15px 20px;
        display: flex;
        justify-content: space-between;
        align-items: center;
    }
    
    .chat-header h3 {
        margin: 0;
        font-size: 1rem;
    }
    
    .close-chat {
        background: rgba(255, 255, 255, 0.2);
        border: none;
        color: white;
        width: 30px;
        height: 30px;
        border-radius: 50%;
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 0.9rem;
        transition: all 0.3s ease;
    }
    
    .close-chat:hover {
        background: rgba(255, 255, 255, 0.3);
    }
    
    .chat-messages {
        flex: 1;
        padding: 20px;
        overflow-y: auto;
        background: #f8f9fa;
        max-height: 350px;
    }
    
    .chat-input {
        padding: 15px 20px;
        background: white;
        border-top: 1px solid #e1e5e9;
        display: flex;
        gap: 10px;
        align-items: center;
    }
    
    .chat-input input {
        flex: 1;
        padding: 10px 15px;
        border: 2px solid #e1e5e9;
        border-radius: 20px;
        font-size: 0.9rem;
        outline: none;
    }
    
    .chat-input input:focus {
        border-color: #667eea;
    }
    
    .chat-input button {
        width: 40px;
        height: 40px;
        border-radius: 50%;
        background: #667eea;
        border: none;
        color: white;
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1rem;
        transition: all 0.3s ease;
    }
    
    .chat-input button:hover {
        background: #5a6fd8;
        transform: scale(1.1);
    }
}

/* 消息样式 */
.message {
    margin-bottom: 15px;
    display: flex;
    flex-direction: column;
}

.message.user {
    align-items: flex-end;
}

.message.admin {
    align-items: flex-start;
}

.message.system {
    align-items: center;
}

.message p {
    max-width: 80%;
    padding: 12px 16px;
    border-radius: 20px;
    margin: 0;
    font-size: 0.9rem;
    word-wrap: break-word;
}

.message.user p {
    background: #667eea;
    color: white;
    border-bottom-right-radius: 5px;
}

.message.admin p {
    background: white;
    color: #333;
    border: 1px solid #e1e5e9;
    border-bottom-left-radius: 5px;
}

.message.system p {
    background: #e3f2fd;
    color: #1976d2;
    border-radius: 15px;
    font-size: 0.8rem;
}

.message .timestamp {
    font-size: 0.7rem;
    color: #999;
    margin-top: 5px;
}

.message .sender {
    font-size: 0.7rem;
    color: #666;
    margin-bottom: 2px;
    font-weight: 500;
}

/* 提示消息样式 */
.message.system.notice p {
    background: #fff3cd;
    color: #856404;
    border-left: 3px solid #ffc107;
    font-weight: 500;
    border-radius: 8px;
}

.message.system.notice i {
    color: #ffc107;
    margin-right: 5px;
}