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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: #f5f7fa;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 移动端适配 */
@media (max-width: 768px) {
    body {
        align-items: stretch;
        justify-content: stretch;
        padding: 0;
    }
}

.chat-container {
    width: 100%;
    max-width: 420px;
    height: 650px;
    background: white;
    border-radius: 24px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: all 0.3s ease;
}

.chat-container.minimized {
    display: none;
}

.chat-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 20px 24px;
    display: flex;
    align-items: center;
    gap: 14px;
    position: relative;
}

.admin-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
}

.admin-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.avatar-placeholder {
    color: white;
    font-size: 18px;
    font-weight: 600;
}

.admin-info {
    flex: 1;
}

.admin-name {
    font-size: 16px;
    font-weight: 600;
    color: white;
    margin-bottom: 4px;
}

.admin-status {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.9);
}

.status-dot {
    width: 8px;
    height: 8px;
    background: #4ade80;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(74, 222, 128, 0.7);
    }
    50% {
        box-shadow: 0 0 0 6px rgba(74, 222, 128, 0);
    }
}

.minimize-btn {
    width: 32px;
    height: 32px;
    border: none;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s ease;
}

.minimize-btn:hover {
    background: rgba(255, 255, 255, 0.3);
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    background: #f8f9fa;
    flex-direction: column;
    gap: 16px;
}

/* 移动端消息区域 */
@media (max-width: 768px) {
    .chat-messages {
        padding: 15px 10px;
    }
}

.message {
    display: flex;
    gap: 12px;
    max-width: 80%;
    animation: messageSlideIn 0.3s ease;
}

@keyframes messageSlideIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message.user {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.message-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    overflow: hidden;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 600;
    flex-shrink: 0;
}

.message-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.message.user .message-avatar {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.message-content {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.message-bubble {
    padding: 12px 16px;
    border-radius: 18px;
    background: white;
    color: #2c3e50;
    word-wrap: break-word;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    line-height: 1.5;
}

.message.user .message-bubble {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.message-bubble img {
    max-width: 100%;
    border-radius: 12px;
    margin-top: 4px;
    display: block;
}

.message-bubble a {
    color: inherit;
    text-decoration: underline;
}

.message-time {
    font-size: 11px;
    color: #95a5a6;
    padding: 0 8px;
}

.chat-input-container {
    padding: 16px;
    background: white;
    border-top: 1px solid #e9ecef;
    display: flex;
    gap: 8px;
    align-items: flex-end;
}

/* 移动端输入区域 */
@media (max-width: 768px) {
    .chat-input-container {
        padding: 12px 10px;
        padding-bottom: calc(12px + env(safe-area-inset-bottom)); /* 适配iPhone底部安全区域 */
    }
}

.emoji-btn,
.image-btn {
    width: 36px;
    height: 36px;
    border: none;
    background: #f8f9fa;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #667eea;
    flex-shrink: 0;
}

.emoji-btn:hover,
.image-btn:hover {
    background: #e9ecef;
    transform: scale(1.1);
}

#messageInput {
    flex: 1;
    padding: 10px 14px;
    border: 2px solid #e9ecef;
    border-radius: 18px;
    font-size: 14px;
    resize: none;
    max-height: 100px;
    font-family: inherit;
    transition: border-color 0.3s ease;
}

#messageInput:focus {
    outline: none;
    border-color: #667eea;
}

.send-btn {
    width: 36px;
    height: 36px;
    border: none;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.send-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.send-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: scale(1);
}

.emoji-picker {
    position: absolute;
    bottom: 80px;
    left: 20px;
    right: 20px;
    background: white;
    border-radius: 16px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    padding: 16px;
    display: none;
    z-index: 1000;
    max-height: 300px;
    overflow-y: auto;
}

.emoji-picker.active {
    display: block;
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.emoji-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(40px, 1fr));
    gap: 8px;
    font-size: 24px;
    text-align: center;
}

.emoji-grid span {
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    transition: background 0.2s ease;
}

.emoji-grid span:hover {
    background: #f8f9fa;
}

.chat-float-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    border: none;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    z-index: 999;
}

.chat-float-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 24px rgba(102, 126, 234, 0.5);
}

.unread-indicator {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 12px;
    height: 12px;
    background: #e74c3c;
    border-radius: 50%;
    border: 2px solid white;
    animation: ping 1s cubic-bezier(0, 0, 0.2, 1) infinite;
}

@keyframes ping {
    0% {
        transform: scale(1);
        opacity: 1;
    }
    75%, 100% {
        transform: scale(2);
        opacity: 0;
    }
}

.typing-indicator {
    display: flex;
    gap: 4px;
    padding: 12px 16px;
    background: white;
    border-radius: 18px;
    width: fit-content;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.typing-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #95a5a6;
    animation: typing 1.4s infinite;
}

.typing-dot:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-dot:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typing {
    0%, 60%, 100% {
        transform: translateY(0);
    }
    30% {
        transform: translateY(-8px);
    }
}

/* 滚动条样式 */
.chat-messages::-webkit-scrollbar {
    width: 6px;
}

.chat-messages::-webkit-scrollbar-track {
    background: transparent;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: #cbd5e0;
    border-radius: 3px;
}

.chat-messages::-webkit-scrollbar-thumb:hover {
    background: #a0aec0;
}

/* 响应式 */
@media (max-width: 480px) {
    body {
        padding: 0;
    }
    
    .chat-container {
        max-width: 100%;
        height: 100vh;
        border-radius: 0;
    }
    
    .chat-float-btn {
        bottom: 20px;
        right: 20px;
        width: 56px;
        height: 56px;
    }
}