/**
 * 灵境学堂 v3.0 - 统一设计系统
 * 高等教育级专业感 + 毛玻璃效果
 */

/* ==================== CSS 变量 / 设计令牌 ==================== */
:root {
    /* 主色系 - 学术紫蓝 */
    --primary: #7c3aed;
    --primary-dark: #6d28d9;
    --primary-light: #a78bfa;
    --primary-50: rgba(124, 58, 237, 0.08);
    --primary-100: rgba(124, 58, 237, 0.15);
    --primary-200: rgba(124, 58, 237, 0.25);

    /* 辅助色 */
    --accent: #f59e0b;
    --accent-light: #fbbf24;
    --success: #10b981;
    --success-light: #34d399;
    --danger: #ef4444;
    --danger-light: #f87171;
    --info: #3b82f6;
    --info-light: #60a5fa;
    --warning: #f59e0b;

    /* 背景层次 */
    --bg-base: #0a0e1a;
    --bg-surface: #111827;
    --bg-card: rgba(17, 24, 39, 0.7);
    --bg-elevated: rgba(30, 41, 59, 0.6);
    --bg-overlay: rgba(15, 23, 42, 0.85);

    /* 毛玻璃 */
    --glass-bg: rgba(17, 24, 39, 0.55);
    --glass-bg-light: rgba(30, 41, 59, 0.45);
    --glass-border: rgba(148, 163, 184, 0.12);
    --glass-border-light: rgba(148, 163, 184, 0.2);
    --glass-blur: blur(20px);
    --glass-blur-heavy: blur(40px);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    --glass-shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.4);

    /* 文字 */
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --text-accent: #c4b5fd;

    /* 边框 */
    --border: rgba(148, 163, 184, 0.1);
    --border-light: rgba(148, 163, 184, 0.18);
    --border-focus: var(--primary);

    /* 圆角 */
    --radius-xs: 6px;
    --radius-sm: 10px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-full: 9999px;

    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.25);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 20px rgba(124, 58, 237, 0.15);
    --shadow-glow-accent: 0 0 20px rgba(245, 158, 11, 0.15);

    /* 间距 */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;

    /* 布局 */
    --navbar-h: 64px;
    --sidebar-w: 280px;
    --max-content: 1400px;

    /* 过渡 */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* 字体 */
    --font-sans: 'Inter', 'Segoe UI', 'Microsoft YaHei', 'PingFang SC', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
    --font-display: 'Inter', 'Segoe UI', 'Microsoft YaHei', sans-serif;
}

/* ==================== 全局重置 ==================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-base);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
}

/* 背景装饰 */
body::before {
    content: '';
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(ellipse at 20% 50%, rgba(124, 58, 237, 0.06) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 20%, rgba(59, 130, 246, 0.04) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 80%, rgba(245, 158, 11, 0.03) 0%, transparent 50%);
    z-index: -1;
    pointer-events: none;
}

/* ==================== 毛玻璃核心类 ==================== */
.glass {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
}

.glass-light {
    background: var(--glass-bg-light);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border-light);
    box-shadow: var(--glass-shadow);
}

.glass-heavy {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur-heavy);
    -webkit-backdrop-filter: var(--glass-blur-heavy);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow-lg);
}

/* ==================== 导航栏 ==================== */
.main-navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--navbar-h);
    background: rgba(10, 14, 26, 0.75);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 32px;
    z-index: 1000;
    transition: background var(--transition-normal);
}

.nav-left .logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text-primary);
}

.logo-icon {
    font-size: 28px;
    filter: drop-shadow(0 0 8px rgba(245, 158, 11, 0.4));
}

.logo-text {
    font-size: 1.4rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--accent) 0%, #ef4444 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-center {
    display: flex;
    gap: 6px;
    background: rgba(30, 41, 59, 0.4);
    padding: 4px;
    border-radius: var(--radius-full);
    border: 1px solid var(--glass-border);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    text-decoration: none;
    transition: all var(--transition-normal);
    font-weight: 500;
    font-size: 0.9rem;
    white-space: nowrap;
}

.nav-link:hover {
    color: var(--text-primary);
    background: rgba(148, 163, 184, 0.08);
}

.nav-link.active {
    background: var(--primary);
    color: white;
    box-shadow: 0 2px 12px rgba(124, 58, 237, 0.4);
}

.nav-link i {
    font-size: 0.85rem;
}

.nav-right {
    position: relative;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border: 2px solid var(--glass-border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.1rem;
    transition: all var(--transition-normal);
}

.user-avatar:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-glow);
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 12px);
    right: 0;
    background: rgba(17, 24, 39, 0.9);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    min-width: 200px;
    box-shadow: var(--glass-shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px) scale(0.96);
    transition: all var(--transition-normal);
    z-index: 1001;
    padding: 8px;
}

.dropdown-menu.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    font-size: 0.9rem;
}

.dropdown-item:hover {
    background: rgba(148, 163, 184, 0.08);
    color: var(--text-primary);
}

.dropdown-item i {
    width: 18px;
    text-align: center;
    color: var(--text-muted);
}

.dropdown-divider {
    height: 1px;
    background: var(--border);
    margin: 6px 8px;
}

/* ==================== 页面容器 ==================== */
.page-container {
    max-width: var(--max-content);
    margin: 0 auto;
    padding: 32px;
    padding-top: calc(var(--navbar-h) + 32px);
}

.page-header {
    margin-bottom: 36px;
}

.page-header h1 {
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 14px;
}

.page-header h1 i {
    color: var(--primary-light);
    font-size: 1.6rem;
}

.page-header p {
    color: var(--text-secondary);
    font-size: 1rem;
    max-width: 600px;
}

/* ==================== 卡片系统 ==================== */
.card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 28px;
    margin-bottom: 20px;
    transition: all var(--transition-normal);
}

.card:hover {
    border-color: var(--glass-border-light);
    box-shadow: var(--glass-shadow);
}

.card-elevated {
    background: var(--glass-bg-light);
    backdrop-filter: var(--glass-blur-heavy);
    -webkit-backdrop-filter: var(--glass-blur-heavy);
    border: 1px solid var(--glass-border-light);
    border-radius: var(--radius-lg);
    padding: 28px;
    box-shadow: var(--glass-shadow-lg);
}

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

.card-title {
    font-size: 1.15rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 10px;
}

.card-title i {
    color: var(--primary-light);
}

/* ==================== 按钮系统 ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
    font-family: var(--font-sans);
    position: relative;
    overflow: hidden;
}

.btn::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.1), transparent);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.btn:hover::after {
    opacity: 1;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    box-shadow: 0 4px 16px rgba(124, 58, 237, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(124, 58, 237, 0.45);
}

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

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

.btn-success {
    background: linear-gradient(135deg, var(--success), #059669);
    color: white;
    box-shadow: 0 4px 16px rgba(16, 185, 129, 0.3);
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(16, 185, 129, 0.45);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger), #dc2626);
    color: white;
    box-shadow: 0 4px 16px rgba(239, 68, 68, 0.3);
}

.btn-warning {
    background: linear-gradient(135deg, var(--warning), #d97706);
    color: white;
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    padding: 8px 16px;
}

.btn-ghost:hover {
    background: rgba(148, 163, 184, 0.08);
    color: var(--text-primary);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.85rem;
    border-radius: var(--radius-sm);
}

.btn-lg {
    padding: 16px 32px;
    font-size: 1.05rem;
    border-radius: var(--radius-lg);
}

.btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: var(--radius-sm);
}

.btn-icon.btn-sm {
    width: 32px;
    height: 32px;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

/* ==================== 表单系统 ==================== */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 12px 16px;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: var(--font-sans);
    transition: all var(--transition-normal);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.15);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--text-muted);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

.form-select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2394a3b8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 36px;
}

/* ==================== 标签 / 徽章 ==================== */
.tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 14px;
    border-radius: var(--radius-full);
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.01em;
}

.tag-primary {
    background: var(--primary-100);
    color: var(--primary-light);
}

.tag-success {
    background: rgba(16, 185, 129, 0.15);
    color: var(--success-light);
}

.tag-warning {
    background: rgba(245, 158, 11, 0.15);
    color: var(--accent-light);
}

.tag-danger {
    background: rgba(239, 68, 68, 0.15);
    color: var(--danger-light);
}

.tag-info {
    background: rgba(59, 130, 246, 0.15);
    color: var(--info-light);
}

.tag-ghost {
    background: rgba(148, 163, 184, 0.1);
    color: var(--text-secondary);
}

/* ==================== 网格布局 ==================== */
.grid {
    display: grid;
    gap: 20px;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-5 { grid-template-columns: repeat(5, 1fr); }
.grid-6 { grid-template-columns: repeat(6, 1fr); }

/* ==================== 统计卡片 ==================== */
.stat-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    text-align: center;
    transition: all var(--transition-normal);
}

.stat-card:hover {
    border-color: var(--glass-border-light);
    transform: translateY(-2px);
    box-shadow: var(--glass-shadow);
}

.stat-card .stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    margin: 0 auto 14px;
}

.stat-card .stat-value {
    font-size: 1.8rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 4px;
}

.stat-card .stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* ==================== 进度条 ==================== */
.progress-bar {
    height: 6px;
    background: rgba(148, 163, 184, 0.1);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    border-radius: var(--radius-full);
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    transition: width 0.6s ease;
}

.progress-fill.success {
    background: linear-gradient(90deg, var(--success), var(--success-light));
}

/* ==================== 模态框 ==================== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    padding: 20px;
}

.modal-overlay.active {
    display: flex;
}

.modal-content {
    background: rgba(17, 24, 39, 0.95);
    backdrop-filter: blur(32px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: 32px;
    max-width: 560px;
    width: 100%;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: var(--glass-shadow-lg);
    animation: modalIn 0.3s ease;
}

@keyframes modalIn {
    from { opacity: 0; transform: scale(0.95) translateY(10px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 36px;
    height: 36px;
    border: none;
    border-radius: 50%;
    background: rgba(148, 163, 184, 0.1);
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger);
}

/* ==================== 加载状态 ==================== */
.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--glass-border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(10, 14, 26, 0.9);
    backdrop-filter: blur(8px);
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 9998;
    gap: 16px;
}

.loading-overlay.active {
    display: flex;
}

.skeleton {
    background: linear-gradient(90deg, rgba(148, 163, 184, 0.05) 25%, rgba(148, 163, 184, 0.1) 50%, rgba(148, 163, 184, 0.05) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius-sm);
}

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

/* ==================== 滚动条 ==================== */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

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

::-webkit-scrollbar-thumb {
    background: rgba(148, 163, 184, 0.15);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(148, 163, 184, 0.25);
}

/* ==================== 动画 ==================== */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

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

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

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-6px); }
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(124, 58, 237, 0.4); }
    50% { box-shadow: 0 0 0 12px rgba(124, 58, 237, 0); }
}

@keyframes glow {
    0%, 100% { box-shadow: 0 0 20px rgba(124, 58, 237, 0.2); }
    50% { box-shadow: 0 0 40px rgba(124, 58, 237, 0.4); }
}

@keyframes typingBounce {
    0%, 60%, 100% { transform: translateY(0); }
    30% { transform: translateY(-6px); }
}

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

@keyframes drawProgress {
    0% { stroke-dashoffset: 100; }
    100% { stroke-dashoffset: 0; }
}

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

.animate-fade-in {
    animation: fadeIn 0.4s ease;
}

.animate-fade-in-up {
    animation: fadeInUp 0.5s ease;
}

.animate-slide-in {
    animation: slideInRight 0.4s ease;
}

/* ==================== 精灵浮窗容器 ==================== */
.spirit-float-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 9999;
    transition: all var(--transition-normal);
}

.spirit-float-collapsed {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    background: rgba(17, 24, 39, 0.8);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--glass-border-light);
    border-radius: var(--radius-full);
    box-shadow: var(--glass-shadow-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.spirit-float-collapsed:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
    border-color: rgba(245, 158, 11, 0.3);
}

.spirit-avatar-mini {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), #ef4444);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    animation: float 3s ease-in-out infinite;
    box-shadow: 0 0 16px rgba(245, 158, 11, 0.3);
}

.spirit-info-mini {
    display: flex;
    flex-direction: column;
}

.spirit-name-mini {
    font-weight: 700;
    font-size: 0.95rem;
}

.spirit-level-mini {
    font-size: 0.78rem;
    color: var(--text-muted);
}

/* 展开状态 */
.spirit-float-expanded {
    width: 380px;
    height: 520px;
    background: rgba(10, 14, 26, 0.92);
    backdrop-filter: blur(32px);
    -webkit-backdrop-filter: blur(32px);
    border: 1px solid var(--glass-border-light);
    border-radius: var(--radius-xl);
    box-shadow: var(--glass-shadow-lg);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.spirit-float-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    background: rgba(30, 41, 59, 0.4);
    border-bottom: 1px solid var(--glass-border);
    cursor: move;
}

.spirit-header-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.spirit-avatar-small {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), #ef4444);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    box-shadow: 0 0 12px rgba(245, 158, 11, 0.25);
}

.spirit-header-text {
    display: flex;
    flex-direction: column;
}

.spirit-name {
    font-weight: 700;
    font-size: 0.95rem;
}

.spirit-meta {
    font-size: 0.78rem;
    color: var(--text-muted);
}

.spirit-header-actions {
    display: flex;
    gap: 6px;
}

.spirit-btn-icon {
    width: 32px;
    height: 32px;
    border: none;
    border-radius: var(--radius-sm);
    background: rgba(148, 163, 184, 0.08);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.spirit-btn-icon.active {
    background: var(--success);
    color: white;
}

/* 聊天消息 */
.spirit-chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 16px 20px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.spirit-message {
    display: flex;
    gap: 10px;
    max-width: 88%;
    animation: fadeIn 0.3s ease;
}

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

.spirit-message-avatar {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: rgba(148, 163, 184, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    flex-shrink: 0;
}

.spirit-message-assistant .spirit-message-avatar {
    background: linear-gradient(135deg, var(--accent), #ef4444);
}

.spirit-message-content {
    padding: 10px 16px;
    border-radius: var(--radius-md);
    background: rgba(30, 41, 59, 0.5);
    font-size: 0.88rem;
    line-height: 1.6;
    word-wrap: break-word;
}

.spirit-message-user .spirit-message-content {
    background: var(--primary-200);
}

.spirit-message-content code {
    background: rgba(0,0,0,0.3);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.82rem;
}

.spirit-message-content pre {
    background: #0d1117;
    padding: 12px;
    border-radius: var(--radius-sm);
    overflow-x: auto;
    margin: 8px 0;
}

.spirit-message-content pre code {
    background: none;
    padding: 0;
}

/* 精灵输入区 */
.spirit-input-area {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    border-top: 1px solid var(--glass-border);
    background: rgba(30, 41, 59, 0.3);
}

.spirit-input-btn {
    width: 36px;
    height: 36px;
    border: none;
    border-radius: 50%;
    background: rgba(148, 163, 184, 0.08);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

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

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

.spirit-text-input {
    flex: 1;
    padding: 10px 14px;
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    color: var(--text-primary);
    font-size: 0.88rem;
    outline: none;
    transition: all var(--transition-normal);
    font-family: var(--font-sans);
}

.spirit-text-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(124, 58, 237, 0.15);
}

.spirit-send-btn {
    width: 36px;
    height: 36px;
    border: none;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.spirit-send-btn:hover {
    transform: scale(1.08);
    box-shadow: 0 4px 12px rgba(124, 58, 237, 0.4);
}

/* 语音录制 */
.spirit-voice-recording {
    position: absolute;
    bottom: 70px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(239, 68, 68, 0.9);
    backdrop-filter: blur(12px);
    color: white;
    padding: 10px 20px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.85rem;
    font-weight: 500;
}

.recording-wave {
    display: flex;
    gap: 3px;
    align-items: center;
    height: 18px;
}

.recording-wave span {
    width: 3px;
    background: white;
    border-radius: 2px;
    animation: wave 0.5s ease-in-out infinite;
}

.recording-wave span:nth-child(1) { height: 6px; animation-delay: 0s; }
.recording-wave span:nth-child(2) { height: 14px; animation-delay: 0.1s; }
.recording-wave span:nth-child(3) { height: 18px; animation-delay: 0.2s; }
.recording-wave span:nth-child(4) { height: 14px; animation-delay: 0.3s; }
.recording-wave span:nth-child(5) { height: 6px; animation-delay: 0.4s; }

@keyframes wave {
    0%, 100% { transform: scaleY(1); }
    50% { transform: scaleY(0.4); }
}

/* ==================== 统一多模态输入组件 ==================== */
.unified-input-container {
    position: relative;
    margin-bottom: 16px;
}

.unified-input-container textarea,
.unified-input-container input[type="text"] {
    width: 100%;
    padding: 14px 18px;
    background: rgba(15, 23, 42, 0.5);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: var(--font-sans);
    resize: vertical;
    min-height: 80px;
    transition: all var(--transition-normal);
}

.unified-input-container textarea:focus,
.unified-input-container input[type="text"]:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.12);
}

.unified-toolbar {
    display: flex;
    gap: 8px;
    margin-top: 10px;
    align-items: center;
}

.unified-btn {
    width: 36px;
    height: 36px;
    border: none;
    border-radius: 50%;
    background: rgba(148, 163, 184, 0.08);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.unified-btn:hover {
    background: var(--primary);
    color: white;
    transform: scale(1.08);
}

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

.unified-btn.send-btn {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    margin-left: auto;
}

.unified-btn.send-btn:hover {
    box-shadow: 0 4px 12px rgba(124, 58, 237, 0.4);
}

.unified-preview {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 12px;
    padding: 12px 16px;
    background: rgba(30, 41, 59, 0.4);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
}

.preview-name {
    flex: 1;
    font-size: 0.88rem;
    color: var(--text-secondary);
}

.preview-remove {
    width: 24px;
    height: 24px;
    border: none;
    border-radius: 50%;
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ==================== 响应式 ==================== */
@media (max-width: 1400px) {
    .spirit-float-expanded {
        width: 340px;
        height: 460px;
    }
}

@media (max-width: 1200px) {
    .grid-4 { grid-template-columns: repeat(3, 1fr); }
    .grid-5 { grid-template-columns: repeat(4, 1fr); }
    .grid-6 { grid-template-columns: repeat(4, 1fr); }
    .spirit-float-expanded {
        width: 320px;
        height: 440px;
    }
}

@media (max-width: 992px) {
    .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .grid-5, .grid-6 { grid-template-columns: repeat(3, 1fr); }
    .nav-center {
        display: none;
    }
}

@media (max-width: 768px) {
    .grid-2, .grid-3, .grid-4, .grid-5, .grid-6 { grid-template-columns: 1fr; }
    .page-container {
        padding: 16px;
        padding-top: calc(var(--navbar-h) + 16px);
    }
    .spirit-float-expanded {
        width: 100vw;
        height: 60vh;
        right: 0;
        left: 0;
        bottom: 0;
        border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    }
    .main-navbar {
        padding: 0 16px;
    }
}

/* ==================== 工具类 ==================== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }
.text-primary { color: var(--primary-light); }
.text-success { color: var(--success-light); }
.text-danger { color: var(--danger-light); }
.text-accent { color: var(--accent); }

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }

.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }

.hidden { display: none !important; }
.visible { visibility: visible; }
.invisible { visibility: hidden; }

.truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.line-clamp-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.line-clamp-3 {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ==================== 加载优化组件 ==================== */

/* 流式内容打字指示器 */
.typing-indicator {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 12px 16px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.typing-indicator .typing-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--primary-light);
    animation: typingBounce 1.4s infinite ease-in-out both;
}

.typing-indicator .typing-dot:nth-child(1) { animation-delay: -0.32s; }
.typing-indicator .typing-dot:nth-child(2) { animation-delay: -0.16s; }
.typing-indicator .typing-dot:nth-child(3) { animation-delay: 0s; }

.typing-indicator .typing-text {
    margin-left: 8px;
    font-size: 13px;
    color: var(--text-secondary);
}

/* 图片/思维导图占位加载 */
.placeholder-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    text-align: center;
    min-height: 160px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.placeholder-card .placeholder-shimmer {
    width: 100%;
    height: 120px;
    background: linear-gradient(90deg, rgba(148,163,184,0.05) 25%, rgba(148,163,184,0.1) 50%, rgba(148,163,184,0.05) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius-md);
}

.placeholder-card .placeholder-text {
    font-size: 13px;
    color: var(--text-muted);
}

.placeholder-card .placeholder-icon {
    font-size: 32px;
    color: var(--primary-light);
    opacity: 0.5;
    animation: pulse 2s infinite;
}

/* 局部加载状态（非全屏遮罩） */
.local-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 8px 12px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    font-size: 12px;
    color: var(--text-secondary);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.local-loading .local-loading-spinner {
    width: 14px;
    height: 14px;
    border: 2px solid rgba(124, 58, 237, 0.2);
    border-top-color: var(--primary-light);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* Agent状态进度指示 */
.agent-progress-bar {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: rgba(124, 58, 237, 0.08);
    border-radius: var(--radius-md);
    font-size: 12px;
    color: var(--text-secondary);
}

.agent-progress-bar .agent-step {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--text-muted);
    transition: all 0.3s ease;
}

.agent-progress-bar .agent-step.active {
    background: var(--primary-light);
    box-shadow: 0 0 6px rgba(124, 58, 237, 0.4);
}

.agent-progress-bar .agent-step.completed {
    background: var(--success-light);
}

/* 输入框小型加载动画 */
.input-loading {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    font-size: 11px;
    color: var(--text-muted);
}

.input-loading .input-loading-spinner {
    width: 10px;
    height: 10px;
    border: 1.5px solid rgba(124, 58, 237, 0.2);
    border-top-color: var(--primary-light);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* Official footer shared by the top-nav pages. */
@property --lingbao-footer-flow-angle {
    syntax: "<angle>";
    inherits: false;
    initial-value: 180deg;
}

.lingbao-wave-footer {
    position: relative;
    isolation: isolate;
    overflow: hidden;
    width: 100%;
    margin-top: clamp(42px, 5vw, 68px);
    padding: clamp(30px, 3.2vw, 42px) clamp(22px, 5vw, 64px);
    min-height: auto;
    border-top: 1px solid rgba(196, 181, 253, 0.26);
    background:
        linear-gradient(90deg, rgba(124, 58, 237, 0.14), transparent 22%, transparent 78%, rgba(59, 130, 246, 0.12)),
        linear-gradient(180deg, rgba(31, 33, 55, 0.9), rgba(18, 23, 42, 0.94));
    backdrop-filter: blur(18px) saturate(1.18);
    -webkit-backdrop-filter: blur(18px) saturate(1.18);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.1),
        0 -14px 36px rgba(8, 10, 24, 0.24);
    color: var(--text-primary);
    text-align: center;
}

.lingbao-wave-footer::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 1;
    border: 1px solid rgba(196, 181, 253, 0.22);
    box-shadow: inset 0 0 18px rgba(124, 58, 237, 0.08);
    pointer-events: none;
}

.lingbao-wave-footer::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 0;
    background:
        radial-gradient(circle at 50% -40%, rgba(167, 139, 250, 0.2), transparent 42%),
        linear-gradient(180deg, rgba(255, 255, 255, 0.04), transparent 46%);
    pointer-events: none;
}

.lingbao-footer-flow {
    --lingbao-footer-flow-angle: 180deg;
    position: absolute;
    inset: 0;
    z-index: 4;
    padding: 2px;
    background:
        conic-gradient(from var(--lingbao-footer-flow-angle), transparent 0deg, transparent 248deg, rgba(167, 139, 250, 0.18) 278deg, rgba(125, 211, 252, 0.98) 304deg, rgba(216, 180, 254, 0.24) 332deg, transparent 360deg);
    -webkit-mask:
        linear-gradient(#000 0 0) content-box,
        linear-gradient(#000 0 0);
    -webkit-mask-composite: xor;
    mask:
        linear-gradient(#000 0 0) content-box,
        linear-gradient(#000 0 0);
    mask-composite: exclude;
    filter: drop-shadow(0 0 10px rgba(125, 211, 252, 0.68));
    animation: lingbaoFooterBorderSpin 3.8s linear infinite;
    pointer-events: none;
}

.lingbao-footer-waves,
.lingbao-footer-wave,
.lingbao-footer-wave-0,
.lingbao-footer-wave-1,
.lingbao-footer-wave-2,
.lingbao-footer-wave-3 {
    display: none;
}

.lingbao-footer-content {
    position: relative;
    z-index: 5;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 9px;
    width: min(1040px, 100%);
    margin: 0 auto;
    color: rgba(226, 232, 240, 0.92);
    line-height: 1.55;
    text-align: center;
    text-shadow: 0 2px 14px rgba(0, 0, 0, 0.38);
}

.lingbao-footer-links {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0;
    margin: 0 auto 2px;
    font-size: clamp(0.88rem, 1.02vw, 0.98rem);
    font-weight: 650;
}

.lingbao-footer-links a {
    color: rgba(248, 250, 252, 0.96);
    text-decoration: none;
    padding: 0 16px;
    line-height: 1.15;
    border-right: 1px solid rgba(203, 213, 225, 0.38);
    transition: color var(--transition-fast), text-shadow var(--transition-fast);
}

.lingbao-footer-links a:last-child {
    border-right: none;
}

.lingbao-footer-links a:hover {
    color: #ffffff;
    text-shadow: 0 0 14px rgba(196, 181, 253, 0.56);
}

.lingbao-footer-meta,
.lingbao-footer-note {
    margin: 0;
    max-width: 100%;
    color: rgba(226, 232, 240, 0.9);
    font-size: clamp(0.78rem, 0.94vw, 0.88rem);
    font-weight: 560;
}

.lingbao-footer-note {
    color: rgba(196, 181, 253, 0.92);
    font-size: clamp(0.76rem, 0.92vw, 0.84rem);
}

@keyframes lingbaoFooterBorderSpin {
    0% { --lingbao-footer-flow-angle: 180deg; }
    100% { --lingbao-footer-flow-angle: 540deg; }
}

@media (max-width: 760px) {
    .lingbao-wave-footer {
        margin-top: 42px;
        padding: 28px 18px 30px;
        min-height: auto;
    }

    .lingbao-footer-links a {
        padding: 4px 11px;
        border-right: 0;
    }
}

@media (prefers-reduced-motion: reduce) {
    .lingbao-footer-flow {
        animation: none;
        opacity: 0.5;
    }
}