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

:root {
    /* 主色调 */
    --primary-color: #5b21b6;
    --primary-light: #7c3aed;
    --primary-dark: #4c1d95;
    
    /* 辅助色 */
    --secondary-color: #06b6d4;
    --secondary-light: #22d3ee;
    --secondary-dark: #0891b2;
    
    /* 功能色 */
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --info-color: #3b82f6;
    
    /* 中性色 */
    --light-bg: #f9fafb;
    --card-bg: #ffffff;
    --text-primary: #111827;
    --text-secondary: #4b5563;
    --text-muted: #9ca3af;
    --border-color: #e5e7eb;
    --border-light: #f3f4f6;
    
    /* 阴影和圆角 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --border-radius-sm: 8px;
    --border-radius: 12px;
    --border-radius-lg: 16px;
    
    /* 动画和过渡 */
    --transition-fast: all 0.2s ease;
    --transition: all 0.3s ease;
    --transition-slow: all 0.5s ease;
    
    /* 间距 */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    /* 其他 */
    --header-height: 60px;
    --input-height: 48px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background: var(--light-bg);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

/* 背景装饰 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    right: 0;
    width: 40%;
    height: 100vh;
    background: radial-gradient(circle at 100% 0%, rgba(91, 33, 182, 0.05) 0%, rgba(6, 182, 212, 0.03) 50%, transparent 100%);
    z-index: -1;
}

body::after {
    content: '';
    position: fixed;
    bottom: 0;
    left: 0;
    width: 40%;
    height: 60vh;
    background: radial-gradient(circle at 0% 100%, rgba(16, 185, 129, 0.05) 0%, transparent 60%);
    z-index: -1;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-lg);
}

/* 页面主标题样式 */
.page-title {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
    text-align: center;
}

/* 页面描述样式 */
.page-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    text-align: center;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

.navbar {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
    position: relative;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav-icon {
    color: white;
    transition: transform 0.3s ease;
}

.nav-brand:hover .nav-icon {
    transform: rotate(10deg) scale(1.1);
}

.nav-title {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.nav-links {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-link {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-sm);
    transition: all 0.3s ease;
    position: relative;
    display: inline-block;
}

.nav-link:hover {
    color: white;
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-1px);
}

.nav-link.active {
    color: white;
    background: rgba(255, 255, 255, 0.15);
    font-weight: 600;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 3px;
    background: var(--secondary-light);
    border-radius: 3px;
}

/* 导航栏响应式设计 */
@media (max-width: 768px) {
    .nav-links {
        gap: var(--spacing-sm);
    }
    
    .nav-title {
        font-size: 1.25rem;
    }
    
    .nav-link {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .nav-container {
        flex-direction: column;
        height: auto;
        padding: var(--spacing-sm) var(--spacing-md);
        gap: var(--spacing-sm);
    }
    
    .nav-links {
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .nav-brand {
        padding: var(--spacing-sm) 0;
    }
}

/* 淡入上移动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 添加卡片浮动效果 */
@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-5px); }
    100% { transform: translateY(0px); }
}

/* 通用区域样式 */
section {
    background-color: var(--card-bg);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid var(--border-light);
    position: relative;
    overflow: hidden;
}

/* 子标题样式 */
.section-subtitle {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: var(--spacing-md) 0 var(--spacing-sm);
    padding-bottom: var(--spacing-xs);
    border-bottom: 1px solid var(--border-color);
    display: inline-block;
}

/* 消息输入容器 */
.message-input-container {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

/* 卡片装饰效果 */
section::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, transparent 50%, rgba(91, 33, 182, 0.05) 50%);
    border-radius: 0 0 0 80px;
}

section::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    height: 3px;
    width: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

section:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
    /* 移除动画以避免闪烁和模糊问题 */
}

.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
    padding-bottom: 0.75rem;
    border-bottom: 2px solid rgba(91, 33, 182, 0.1);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    position: relative;
}

.section-title::before {
    content: '⟳';
    display: inline-block;
    font-size: 1.2rem;
    opacity: 0.8;
    transition: transform 0.3s ease;
}

.section-title:hover::before {
    transform: rotate(180deg);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 60px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
}

.section-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 10px;
}

/* 连接设置区域 */
.connection-controls {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
    align-items: flex-end;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    flex: 1;
    min-width: 200px;
    position: relative;
}

.input-group label {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: var(--transition);
}

.input-group:focus-within label {
    color: var(--primary-color);
    transform: translateX(2px);
}

input[type="text"],
input[type="number"] {
    padding: 1rem 1.25rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
    background-color: white;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05) inset;
    position: relative;
    z-index: 1;
}

/* 输入框背景装饰 */
input[type="text"]::before,
input[type="number"]::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, transparent 0%, rgba(91, 33, 182, 0.02) 100%);
    border-radius: var(--border-radius);
    z-index: -1;
}

input[type="text"]:hover,
input[type="number"]:hover {
    border-color: var(--primary-light);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

input[type="text"]:focus,
input[type="number"]:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(91, 33, 182, 0.1);
    transform: translateY(-1px);
}

/* 按钮样式 */
.btn-primary,
.btn-secondary {
    padding: 1rem 1.75rem;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    min-width: 100px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    position: relative;
    overflow: hidden;
    z-index: 1;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    height: var(--input-height);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(91, 33, 182, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* 主按钮光效 */
.btn-primary::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(
        45deg,
        transparent,
        rgba(255, 255, 255, 0.2),
        transparent
    );
    transform: rotate(45deg);
    animation: shine 3s infinite;
}

@keyframes shine {
    0% { transform: rotate(45deg) translateX(-100%); }
    100% { transform: rotate(45deg) translateX(100%); }
}

/* 主按钮悬停渐变效果 */
.btn-primary::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
    opacity: 0;
    transition: opacity 0.3s;
}

.btn-primary:hover:not(:disabled)::after {
    opacity: 1;
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(91, 33, 182, 0.4);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
    box-shadow: 0 4px 12px rgba(91, 33, 182, 0.3);
}

/* 次要按钮样式 */
.btn-secondary {
    background-color: var(--light-bg);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.btn-secondary:hover {
    background-color: white;
    border-color: var(--primary-light);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.btn-secondary:active {
    transform: translateY(0);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

/* 禁用状态 */
button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

button:disabled::before,
button:disabled::after {
    display: none;
}

/* 状态指示器 */
.status-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    min-width: 160px;
    padding: 0.75rem 1.25rem;
    background-color: rgba(243, 244, 246, 0.7);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-light);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.status-container::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--danger-color);
}

.status-connected .status-container::after {
    background: var(--success-color);
}

.status-connecting .status-container::after {
    background: var(--warning-color);
}

.status-label {
    font-weight: 600;
    color: var(--text-secondary);
    white-space: nowrap;
    font-size: 0.9rem;
    letter-spacing: 0.5px;
}

.status-indicator {
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

/* 状态指示器内部装饰 */
.status-indicator::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
}

.status-disconnected {
    background-color: var(--danger-color);
    color: white;
    box-shadow: 0 2px 8px rgba(239, 68, 68, 0.2);
}

.status-connecting {
    background-color: var(--warning-color);
    color: white;
    box-shadow: 0 2px 8px rgba(245, 158, 11, 0.2);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { 
        opacity: 1;
        transform: scale(1);
    }
    50% { 
        opacity: 0.8;
        transform: scale(1.05);
    }
    100% { 
        opacity: 1;
        transform: scale(1);
    }
}

.status-connected {
    background-color: var(--success-color);
    color: white;
    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.2);
}

/* 添加状态图标 */
.status-indicator::after {
    content: '●';
    font-size: 0.6rem;
    opacity: 0.8;
}

/* 消息记录区域 */
.message-log {
    width: 100%;
    height: 400px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    overflow-y: auto;
    background-color: var(--light-bg);
    font-family: 'Fira Code', 'Courier New', Courier, monospace;
    font-size: 0.95rem;
    line-height: 1.6;
    transition: var(--transition);
    position: relative;
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.05);
}

/* 消息日志顶部装饰条 */
.message-log::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--border-radius) var(--border-radius) 0 0;
}

.message-log:hover {
    border-color: var(--primary-light);
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.05), 0 0 0 1px rgba(91, 33, 182, 0.05);
}

/* 美化滚动条 */
.message-log::-webkit-scrollbar {
    width: 8px;
}

.message-log::-webkit-scrollbar-track {
    background: var(--light-bg);
    border-radius: 4px;
    margin: var(--spacing-md) 0;
}

.message-log::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 4px;
    transition: var(--transition);
    border: 2px solid var(--light-bg);
}

.message-log::-webkit-scrollbar-thumb:hover {
    background: var(--primary-light);
    transform: scale(1.1);
}

.message-log::-webkit-scrollbar-corner {
    background: var(--light-bg);
}

/* 消息项样式 */
.message-item {
    margin-bottom: var(--spacing-md);
    padding: 1rem 1.25rem;
    border-radius: var(--border-radius);
    word-break: break-all;
    transition: var(--transition);
    position: relative;
    animation: slideIn 0.3s ease-out;
    backdrop-filter: blur(10px);
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(10px);
        box-shadow: none;
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message-item:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.message-sent {
    background: linear-gradient(135deg, rgba(91, 33, 182, 0.1) 0%, rgba(91, 33, 182, 0.05) 100%);
    border-left: 4px solid var(--primary-color);
    box-shadow: 0 2px 6px rgba(91, 33, 182, 0.1);
    margin-left: 1rem;
}

.message-received {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, rgba(16, 185, 129, 0.05) 100%);
    border-left: 4px solid var(--success-color);
    box-shadow: 0 2px 6px rgba(16, 185, 129, 0.1);
    margin-right: 1rem;
}

.message-header {
    display: flex;
    align-items: center;
    margin-bottom: 0.5rem;
    gap: var(--spacing-sm);
}

.message-time {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 600;
    opacity: 0.8;
    background: rgba(0, 0, 0, 0.03);
    padding: 0.2rem 0.5rem;
    border-radius: 10px;
}

.message-type {
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 0.5px;
    padding: 0.15rem 0.5rem;
    border-radius: 10px;
    background: rgba(0, 0, 0, 0.03);
}

.message-sent .message-type {
    color: var(--primary-color);
}

.message-received .message-type {
    color: var(--success-color);
}

.message-content {
    background: rgba(255, 255, 255, 0.7);
    padding: 0.75rem;
    border-radius: var(--border-radius-sm);
    border: 1px solid rgba(0, 0, 0, 0.03);
    margin-top: 0.5rem;
}

.message-system {
    background: linear-gradient(135deg, rgba(156, 163, 175, 0.1) 0%, rgba(156, 163, 175, 0.05) 100%);
    border-left: 4px solid var(--text-muted);
    box-shadow: 0 2px 6px rgba(156, 163, 175, 0.1);
    opacity: 0.9;
    margin: 0 auto;
    max-width: 90%;
    text-align: center;
}

.message-system .message-content {
    background: transparent;
    border: none;
    padding: 0;
    margin: 0;
}

/* 消息发送区域 */
.send-controls {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
    align-items: center;
}

.send-controls input[type="text"] {
    flex: 1;
    min-width: 0;
    border: 2px solid var(--border-color);
    padding: 1rem 1.25rem;
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
    position: relative;
    background-color: white;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05) inset;
}

.send-controls input[type="text"]:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(91, 33, 182, 0.1);
    transform: translateY(-1px);
    outline: none;
}

/* 清空按钮 */
.clear-btn {
    padding: 0.75rem;
    border: none;
    border-radius: var(--border-radius);
    background-color: var(--light-bg);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
}

.clear-btn:hover {
    background-color: var(--danger-color);
    color: white;
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

/* 帮助区域 */
.help-content {
    line-height: 1.8;
    padding: 1rem;
    background-color: var(--light-bg);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.help-content h4 {
    margin: 1rem 0 0.75rem 0;
    color: var(--primary-color);
    font-size: 1.1rem;
    font-weight: 600;
}

.help-content h4:first-child {
    margin-top: 0;
}

.help-content ol,
.help-content ul {
    padding-left: 1.5rem;
    margin-bottom: 1rem;
}

.help-content li {
    margin-bottom: 0.75rem;
    position: relative;
}

.help-content li:last-child {
    margin-bottom: 0;
}

.help-content strong {
    color: var(--primary-color);
    font-weight: 600;
}

.help-content a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
    border-bottom: 1px dashed rgba(67, 97, 238, 0.3);
}

.help-content a:hover {
    color: var(--primary-dark);
    border-bottom-color: var(--primary-dark);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    header {
        padding: 2rem 1.5rem;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    header p {
        font-size: 1rem;
    }
    
    section {
        padding: 1.25rem;
    }
    
    .connection-controls {
        flex-direction: column;
        align-items: stretch;
        gap: 1rem;
    }
    
    .input-group {
        min-width: 100%;
    }
    
    .status-container {
        justify-content: center;
        min-width: unset;
        width: 100%;
        order: -1;
    }
    
    .section-controls {
        flex-direction: column;
        align-items: stretch;
        gap: 0.75rem;
    }
    
    .btn-primary,
    .btn-secondary {
        width: 100%;
        padding: 0.85rem 1rem;
    }
    
    .send-controls {
        flex-direction: column;
    }
    
    .message-log {
        height: 280px;
        padding: 1rem;
    }
    
    .section-title {
        font-size: 1.3rem;
    }
    
    .help-content {
        padding: 0.75rem;
    }
}

@media (max-width: 480px) {
    header {
        padding: 1.5rem 1rem;
    }
    
    header h1 {
        font-size: 1.8rem;
    }
    
    section {
        padding: 1rem;
    }
    
    .message-log {
        height: 250px;
    }
    
    .input-group label {
        font-size: 0.85rem;
    }
    
    input[type="text"],
    input[type="number"] {
        padding: 0.75rem;
        font-size: 0.95rem;
    }
}