/* ========================================
   AI Chat Studio - Modern CSS Styles
   ======================================== */

/* CSS Variables for Theme Management */
:root {
    /* Light Theme Colors */
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f5f9;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-tertiary: #94a3b8;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

    /* Brand Colors */
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --primary-light: #eef2ff;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;

    /* Role Colors */
    --role-special: #f59e0b; /* 金色 - 金牌秘书 */
    --role-marketing: #ef4444;
    --role-planning: #8b5cf6;
    --role-operations: #6366f1;
    --role-career: #6366f1;
    --role-education: #10b981;
    --role-life: #f59e0b;
    --role-creative: #ec4899;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;

    /* Header Height */
    --header-height: 64px;
}

/* Dark Theme */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-tertiary: #64748b;
    --border-color: #334155;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.3);
    --primary-light: #312e81;
}

/* ========================================
   Base Styles
   ======================================== */

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* ========================================
   Header
   ======================================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.header-container {
    max-width: 100%;
    height: 100%;
    padding: 0 var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* ========================================
   Quote Banner (AI金句横幅)
   ======================================== */

.quote-banner {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    height: 48px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    padding: 0 var(--spacing-lg);
    gap: var(--spacing-md);
    z-index: 999;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.2);
}

.quote-icon {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1rem;
    flex-shrink: 0;
}

.quote-content {
    flex: 1;
    overflow: hidden;
}

.quote-text {
    color: white;
    font-size: 0.9375rem;
    line-height: 1.4;
    margin: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-weight: 500;
    letter-spacing: 0.3px;
    transition: opacity 0.2s ease-in-out, transform 0.2s ease-in-out;
}

.quote-refresh {
    color: rgba(255, 255, 255, 0.8);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.quote-refresh:hover {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    transform: rotate(180deg);
}

.quote-refresh:active {
    transform: rotate(180deg) scale(0.95);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
}

.logo i {
    font-size: 1.5rem;
}

.wechat-copy-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-left: var(--spacing-sm);
    font-size: 1rem;
}

.wechat-copy-btn:hover {
    color: var(--primary);
    background: var(--bg-tertiary);
    transform: scale(1.1);
}

.wechat-copy-btn:active {
    transform: scale(0.95);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* ========================================
   Buttons
   ======================================== */

.icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
}

.icon-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.icon-btn:active {
    transform: scale(0.95);
}

.btn-primary,
.btn-secondary,
.btn-danger,
.btn-create-role {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn-primary {
    background: var(--primary);
    color: white;
}

.btn-primary:hover:not(:disabled) {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--border-color);
}

.btn-danger {
    background: var(--danger);
    color: white;
}

.btn-danger:hover {
    background: #dc2626;
}

.btn-create-role {
    width: 100%;
    padding: var(--spacing-md);
    background: linear-gradient(135deg, var(--primary) 0%, #8b5cf6 100%);
    color: white;
    border-radius: var(--radius-lg);
}

.btn-create-role:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* ========================================
   Main Container
   ======================================== */

.main-container {
    display: flex;
    flex-direction: column;
    margin-top: calc(var(--header-height) + 48px); /* header + quote banner */
    min-height: calc(100vh - var(--header-height) - 48px);
}

/* ========================================
   Role Selector Bar (Horizontal)
   ======================================== */

.role-selector-bar {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-md) var(--spacing-lg);
    flex-shrink: 0;
}

.role-selector-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
}

.role-selector-header h2 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.btn-create-role-sm {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--primary) 0%, #8b5cf6 100%);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-create-role-sm:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-md);
}

/* Role Tabs Horizontal */
.role-tabs-horizontal {
    display: flex;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
    overflow-x: auto;
    scrollbar-width: none;
}

.role-tabs-horizontal::-webkit-scrollbar {
    display: none;
}

/* Roles Scroll Container */
.roles-scroll-container {
    position: relative;
}

.roles-grid-horizontal {
    display: flex;
    gap: var(--spacing-md);
    overflow-x: auto;
    padding-bottom: var(--spacing-sm);
    scrollbar-width: thin;
    scrollbar-color: var(--border-color) transparent;
}

.roles-grid-horizontal::-webkit-scrollbar {
    height: 6px;
}

.roles-grid-horizontal::-webkit-scrollbar-track {
    background: transparent;
    border-radius: var(--radius-full);
}

.roles-grid-horizontal::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: var(--radius-full);
}

.roles-grid-horizontal::-webkit-scrollbar-thumb:hover {
    background: var(--text-tertiary);
}

/* Role Card Horizontal */
.role-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    min-width: 100px;
    max-width: 120px;
    background: var(--bg-tertiary);
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
}

.role-card:hover {
    background: var(--bg-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.role-card.active {
    border-color: var(--primary);
    background: var(--primary-light);
}

.role-card-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
    font-size: 1.25rem;
    color: white;
    flex-shrink: 0;
}

.role-card-icon.career {
    background: linear-gradient(135deg, var(--role-career) 0%, #818cf8 100%);
}

.role-card-icon.education {
    background: linear-gradient(135deg, var(--role-education) 0%, #34d399 100%);
}

.role-card-icon.life {
    background: linear-gradient(135deg, var(--role-life) 0%, #fbbf24 100%);
}

.role-card-icon.creative {
    background: linear-gradient(135deg, var(--role-creative) 0%, #f472b6 100%);
}

.role-card-icon.marketing {
    background: linear-gradient(135deg, var(--role-marketing) 0%, #f87171 100%);
}

.role-card-icon.special {
    background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 50%, #d97706 100%);
    box-shadow: 0 0 20px rgba(251, 191, 36, 0.4);
    animation: goldenGlow 2s ease-in-out infinite alternate;
}

@keyframes goldenGlow {
    from {
        box-shadow: 0 0 15px rgba(251, 191, 36, 0.3);
    }
    to {
        box-shadow: 0 0 25px rgba(251, 191, 36, 0.6);
    }
}

.role-card-icon.planning {
    background: linear-gradient(135deg, var(--role-planning) 0%, #a78bfa 100%);
}

.role-card-icon.operations {
    background: linear-gradient(135deg, var(--role-operations) 0%, #818cf8 100%);
}

.role-card-info {
    text-align: center;
    width: 100%;
}

.role-card-name {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.role-card-desc {
    display: none;
}

.role-card-delete {
    position: absolute;
    top: 4px;
    right: 4px;
    display: none;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    background: var(--danger);
    border: none;
    border-radius: 50%;
    color: white;
    cursor: pointer;
    font-size: 0.75rem;
    transition: all var(--transition-fast);
}

.role-card:hover .role-card-delete {
    display: flex;
}

.role-card-delete:hover {
    transform: scale(1.1);
}

/* Role Card Edit Button */
.role-card-edit {
    position: absolute;
    top: 4px;
    left: 4px;
    display: none;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    background: var(--primary);
    border: none;
    border-radius: 50%;
    color: white;
    cursor: pointer;
    font-size: 0.625rem;
    transition: all var(--transition-fast);
}

.role-card:hover .role-card-edit {
    display: flex;
}

.role-card-edit:hover {
    transform: scale(1.1);
}

/* Role Tab (shared styles) */
.role-tab {
    flex-shrink: 0;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
    font-weight: 500;
    background: transparent;
    border: none;
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.role-tab:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.role-tab.active {
    background: var(--primary-light);
    color: var(--primary);
}

/* ========================================
   Chat Area
   ======================================== */

.chat-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
    position: relative;
    overflow: hidden;
}

/* Welcome Screen */
.welcome-screen {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    overflow-y: auto;
}

.welcome-content {
    text-align: center;
    max-width: 500px;
}

.welcome-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto var(--spacing-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary) 0%, #8b5cf6 100%);
    border-radius: var(--radius-xl);
    font-size: 3rem;
    color: white;
    animation: welcomeFloat 1s ease-out forwards;
}

@keyframes welcomeFloat {
    0% {
        transform: translateY(30px);
        opacity: 0;
    }
    100% {
        transform: translateY(0);
        opacity: 1;
    }
}

.welcome-content h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.welcome-content p {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

.features {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.feature-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.feature-item i {
    font-size: 1.5rem;
    color: var(--primary);
}

.feature-item span {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.brand-footer {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    font-size: 0.8125rem;
    color: var(--text-tertiary);
}

/* Chat Interface */
.chat-interface {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.chat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

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

.role-avatar {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary) 0%, #8b5cf6 100%);
    border-radius: var(--radius-lg);
    font-size: 1.5rem;
    color: white;
}

.role-info h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.role-info p {
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

.chat-actions {
    display: flex;
    gap: var(--spacing-sm);
}

/* Chat Messages */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    min-height: 0;
}

.message {
    display: flex;
    gap: var(--spacing-md);
    animation: messageSlideIn var(--transition-normal);
}

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

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

.message-avatar {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    flex-shrink: 0;
    font-size: 1rem;
}

.message.assistant .message-avatar {
    background: linear-gradient(135deg, var(--primary) 0%, #8b5cf6 100%);
    color: white;
}

.message.user .message-avatar {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.message-content {
    flex: 1;
    max-width: 70%;
}

.message.user .message-content {
    display: flex;
    justify-content: flex-end;
}

.message-bubble {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    line-height: 1.6;
}

.message.assistant .message-bubble {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.message.user .message-bubble {
    background: var(--primary);
    color: white;
}

.message-bubble p {
    margin-bottom: var(--spacing-sm);
}

.message-bubble p:last-child {
    margin-bottom: 0;
}

.message-bubble pre {
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    overflow-x: auto;
    margin: var(--spacing-sm) 0;
}

.message-bubble code {
    font-family: 'Fira Code', 'Consolas', monospace;
    font-size: 0.875rem;
}

.message-bubble ul,
.message-bubble ol {
    margin-left: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}

.message-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-xs);
}

.message-time {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.message-actions {
    display: flex;
    gap: var(--spacing-xs);
}

.message-action-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-tertiary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.message-action-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}

/* Chat Input */
.chat-input-container {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    flex-shrink: 0;
}

/* Input Toolbar */
.input-toolbar {
    display: flex;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-sm);
}

.toolbar-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.75rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

/* 一键AI按钮特殊样式 */
.ai-magic-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-color: transparent;
    color: white;
    font-weight: 600;
}

.ai-magic-btn:hover {
    background: linear-gradient(135deg, #5a6fd8 0%, #6a4190 100%);
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.toolbar-btn:hover {
    background: var(--primary-light);
    color: var(--primary);
    border-color: var(--primary);
}

.toolbar-btn span {
    font-weight: 500;
}

.toolbar-btn.recording {
    background: var(--danger);
    color: white;
    border-color: var(--danger);
    animation: pulse 1s infinite;
}

/* Character Count */
.char-count {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.input-wrapper {
    display: flex;
    align-items: flex-end;
    gap: var(--spacing-md);
    background: var(--bg-tertiary);
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    padding: var(--spacing-sm);
    transition: all var(--transition-fast);
}

.input-wrapper:focus-within {
    border-color: var(--primary);
    background: var(--bg-secondary);
}

.chat-input {
    flex: 1;
    min-height: 24px;
    max-height: 200px;
    padding: var(--spacing-sm);
    background: transparent;
    border: none;
    outline: none;
    resize: none;
    font-size: 0.9375rem;
    color: var(--text-primary);
    line-height: 1.5;
    font-family: inherit;
}

.chat-input::placeholder {
    color: var(--text-tertiary);
}

.send-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    cursor: pointer;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.send-btn:hover:not(:disabled) {
    background: var(--primary-hover);
    transform: scale(1.05);
}

.send-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.input-hint {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--spacing-sm);
}

#inputHint {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

/* Typing Indicator */
.typing-indicator {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
}

.typing-indicator-inline {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
}

.typing-indicator span,
.typing-indicator-inline span {
    width: 8px;
    height: 8px;
    background: var(--text-tertiary);
    border-radius: 50%;
    animation: typing 1.4s infinite;
}

.typing-indicator span:nth-child(2),
.typing-indicator-inline span:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3),
.typing-indicator-inline span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typing {
    0%, 60%, 100% {
        transform: translateY(0);
        opacity: 0.4;
    }
    30% {
        transform: translateY(-10px);
        opacity: 1;
    }
}

/* ========================================
   Modal
   ======================================== */

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    animation: modalFadeIn var(--transition-normal);
}

.modal.active {
    display: flex;
}

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

.modal-content {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-xl);
    animation: modalSlideUp var(--transition-normal);
}

.modal-large {
    max-width: 700px;
}

@keyframes modalSlideUp {
    from {
        transform: translateY(20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

.modal-body {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-lg);
}

.modal-footer {
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

/* Form Styles */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="number"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.9375rem;
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

.input-with-action {
    display: flex;
    gap: var(--spacing-sm);
}

.input-with-action input {
    flex: 1;
}

/* Icon Selector */
.icon-selector {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.icon-option {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    font-size: 1.125rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.icon-option:hover {
    background: var(--bg-primary);
    color: var(--text-primary);
}

.icon-option.active {
    border-color: var(--primary);
    background: var(--primary-light);
    color: var(--primary);
}

/* Theme Selector */
.theme-selector {
    display: flex;
    gap: var(--spacing-sm);
}

.theme-option {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.theme-option:hover {
    background: var(--bg-primary);
}

.theme-option.active {
    border-color: var(--primary);
    background: var(--primary-light);
    color: var(--primary);
}

.theme-option i {
    font-size: 1.5rem;
}

.theme-option span {
    font-size: 0.875rem;
    font-weight: 500;
}

/* Prompt Reset Hint */
.prompt-reset-hint {
    display: flex;
    justify-content: center;
    padding: var(--spacing-md) 0;
    border-top: 1px solid var(--border-color);
    margin-top: var(--spacing-md);
}

/* Search Results */
#searchInput {
    width: 100%;
    padding: var(--spacing-md);
    font-size: 1rem;
}

.search-results {
    margin-top: var(--spacing-md);
    max-height: 400px;
    overflow-y: auto;
}

.search-result-item {
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.search-result-item:hover {
    background: var(--bg-primary);
}

.search-result-role {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
}

.search-result-role-icon {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary);
    border-radius: var(--radius-sm);
    color: white;
    font-size: 0.75rem;
}

.search-result-role-name {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
}

.search-result-content {
    font-size: 0.875rem;
    color: var(--text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.search-result-highlight {
    background: var(--warning);
    color: var(--bg-primary);
    padding: 0 2px;
    border-radius: 2px;
}

/* Template List */
.template-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.template-card {
    background: var(--bg-tertiary);
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.template-card:hover {
    background: var(--bg-primary);
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.template-card-icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary);
    border-radius: var(--radius-md);
    color: white;
    font-size: 0.875rem;
}

.template-card-title {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-primary);
}

.template-card-desc {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.template-card-content {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm);
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Settings Sections */
.settings-section {
    margin-bottom: var(--spacing-xl);
}

.settings-section h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
}

.section-hint {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--primary-light);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--primary);
}

/* History Styles */
.history-filters {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.history-filters select {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.9375rem;
    color: var(--text-primary);
}

.history-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.history-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.history-item:hover {
    background: var(--bg-primary);
}

.history-item-role {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary) 0%, #8b5cf6 100%);
    border-radius: var(--radius-md);
    color: white;
    flex-shrink: 0;
}

.history-item-content {
    flex: 1;
    min-width: 0;
}

.history-item-title {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.history-item-preview {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.history-item-date {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.empty-state {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--text-tertiary);
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.empty-state p {
    font-size: 0.9375rem;
}

/* ========================================
   Context Menu
   ======================================== */

.context-menu {
    display: none;
    position: fixed;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    z-index: 3000;
    min-width: 150px;
    overflow: hidden;
    animation: contextMenuFadeIn var(--transition-fast);
}

.context-menu.active {
    display: block;
}

@keyframes contextMenuFadeIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.context-menu-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background: transparent;
    border: none;
    font-size: 0.875rem;
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.context-menu-item:hover {
    background: var(--bg-tertiary);
}

.context-menu-item.danger {
    color: var(--danger);
}

.context-menu-item.danger:hover {
    background: rgba(239, 68, 68, 0.1);
}

/* ========================================
   Toast
   ======================================== */

.toast {
    position: fixed;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--text-primary);
    color: var(--bg-primary);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-lg);
    z-index: 4000;
    opacity: 0;
    transition: all var(--transition-normal);
    pointer-events: none;
}

.toast.active {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.toast.success {
    background: var(--success);
}

.toast.error {
    background: var(--danger);
}

/* ========================================
   Scrollbar
   ======================================== */

::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-tertiary);
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 1024px) {
    .role-selector-bar {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .role-card {
        min-width: 90px;
        max-width: 100px;
    }

    .role-card-icon {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }

    .mobile-menu-btn {
        display: none;
    }
}

@media (max-width: 768px) {
    .header-container {
        padding: 0 var(--spacing-md);
    }

    .role-selector-header h2 {
        font-size: 0.875rem;
    }

    .role-card {
        min-width: 80px;
        max-width: 90px;
        padding: var(--spacing-sm);
    }

    .role-card-icon {
        width: 36px;
        height: 36px;
        font-size: 0.875rem;
    }

    .role-card-name {
        font-size: 0.75rem;
    }

    .welcome-content h1 {
        font-size: 1.5rem;
    }

    .features {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .message-content {
        max-width: 85%;
    }

    .chat-header {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .role-info p {
        display: none;
    }

    .chat-messages {
        padding: var(--spacing-md);
    }

    .chat-input-container {
        padding: var(--spacing-md);
    }

    .modal-content {
        max-height: 95vh;
        margin: var(--spacing-md);
    }

    .modal-header,
    .modal-body,
    .modal-footer {
        padding: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .logo span {
        display: none;
    }

    .message-avatar {
        width: 28px;
        height: 28px;
    }

    .message-bubble {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.9375rem;
    }

    .feature-item span {
        font-size: 0.75rem;
    }

    .btn-primary,
    .btn-secondary,
    .btn-danger {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.875rem;
    }
}

/* ========================================
   Utility Classes
   ======================================== */

.hidden {
    display: none !important;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* ========================================
   Animations
   ======================================== */

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.pulse {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.spin {
    animation: spin 1s linear infinite;
}

/* ========================================
   Splash Screen (开屏动画)
   ======================================== */

.splash-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #0f0c29 0%, #302b63 50%, #24243e 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    overflow: hidden;
}

.splash-particles {
    position: absolute;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: rgba(102, 126, 234, 0.6);
    border-radius: 50%;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(100vh) scale(0);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: translateY(-100vh) scale(1);
        opacity: 0;
    }
}

.splash-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: var(--spacing-xl);
}

.splash-logo {
    position: relative;
    width: 120px;
    height: 120px;
    margin: 0 auto var(--spacing-xl);
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-ring {
    position: absolute;
    width: 100%;
    height: 100%;
    border: 2px solid transparent;
    border-top-color: rgba(102, 126, 234, 0.8);
    border-right-color: rgba(118, 75, 162, 0.8);
    border-radius: 50%;
    animation: spin 2s linear infinite;
}

.logo-ring.delay-1 {
    animation-delay: 0.3s;
    width: 85%;
    height: 85%;
    border-top-color: rgba(102, 126, 234, 0.5);
    border-right-color: rgba(118, 75, 162, 0.5);
}

.logo-ring.delay-2 {
    animation-delay: 0.6s;
    width: 70%;
    height: 70%;
    border-top-color: rgba(102, 126, 234, 0.3);
    border-right-color: rgba(118, 75, 162, 0.3);
    animation-direction: reverse;
}

.splash-icon {
    font-size: 3rem;
    color: white;
    animation: iconPulse 2s ease-in-out infinite;
    text-shadow: 0 0 30px rgba(102, 126, 234, 0.8);
}

@keyframes iconPulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.8;
    }
}

.splash-title {
    font-size: 2rem;
    font-weight: 700;
    color: white;
    margin: 0 0 var(--spacing-sm);
    background: linear-gradient(90deg, #667eea, #764ba2, #667eea);
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradientShift 3s linear infinite;
}

@keyframes gradientShift {
    0% {
        background-position: 0% center;
    }
    100% {
        background-position: 200% center;
    }
}

.splash-subtitle {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.7);
    margin: 0 0 var(--spacing-xl);
    letter-spacing: 2px;
}

.splash-loader {
    width: 200px;
    height: 3px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    margin: 0 auto var(--spacing-md);
    overflow: hidden;
    position: relative;
}

.loader-bar {
    height: 100%;
    background: linear-gradient(90deg, #667eea, #764ba2);
    border-radius: var(--radius-full);
    width: 0%;
    animation: loadProgress 2s ease-out forwards;
    position: relative;
}

.loader-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    animation: shimmer 1.5s infinite;
}

@keyframes loadProgress {
    0% {
        width: 0%;
    }
    100% {
        width: 100%;
    }
}

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

.splash-loading-text {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.5);
    margin: 0;
}

/* 开屏动画隐藏 */
.splash-screen.hide {
    animation: fadeOut 0.5s ease-out forwards;
}

@keyframes fadeOut {
    from {
        opacity: 1;
        visibility: visible;
    }
    to {
        opacity: 0;
        visibility: hidden;
    }
}

/* 移动端适配 */
@media (max-width: 768px) {
    .splash-logo {
        width: 100px;
        height: 100px;
    }

    .splash-icon {
        font-size: 2.5rem;
    }

    .splash-title {
        font-size: 1.5rem;
    }

    .splash-subtitle {
        font-size: 0.875rem;
        letter-spacing: 1px;
    }

    .splash-loader {
        width: 160px;
    }

    .particle {
        width: 3px;
        height: 3px;
    }
}

@media (max-width: 480px) {
    .splash-content {
        padding: var(--spacing-lg);
    }

    .splash-title {
        font-size: 1.25rem;
    }

    .splash-logo {
        width: 80px;
        height: 80px;
    }

    .splash-icon {
        font-size: 2rem;
    }
}