:root {
    --bg-primary: #e6f2ff;
    --bg-secondary: rgba(230, 242, 255, 0.95);
    --bg-card: linear-gradient(135deg, rgba(22, 119, 255, 0.08), rgba(64, 169, 255, 0.05));
    --bg-card-hover: linear-gradient(135deg, rgba(22, 119, 255, 0.12), rgba(64, 169, 255, 0.08));
    --bg-glass: rgba(255, 255, 255, 0.6);
    --bg-glass-hover: rgba(255, 255, 255, 0.75);
    --text-primary: #262626;
    --text-secondary: #8c8c8c;
    --text-tertiary: #a0a0a0;
    --accent-primary: #1677ff;
    --accent-secondary: #0d47a1;
    --accent-tertiary: #40a9ff;
    --accent-cyan: #22d3ee;
    --accent-emerald: #52c41a;
    --accent-amber: #f59e0b;
    --accent-rose: #ff4d4f;
    --gradient-primary: linear-gradient(135deg, #1677ff 0%, #40a9ff 100%);
    --gradient-secondary: linear-gradient(135deg, #0d47a1 0%, #1677ff 100%);
    --gradient-glow: linear-gradient(135deg, rgba(22, 119, 255, 0.15), rgba(64, 169, 255, 0.1));
    --gradient-glass: linear-gradient(135deg, rgba(255, 255, 255, 0.7), rgba(255, 255, 255, 0.4));
    --border-color: rgba(22, 119, 255, 0.12);
    --border-hover: rgba(22, 119, 255, 0.25);
    --border-glass: rgba(255, 255, 255, 0.5);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 20px rgba(22, 119, 255, 0.15);
    --shadow-glass: 0 8px 32px rgba(0, 0, 0, 0.08), inset 0 1px 0 rgba(255, 255, 255, 0.6);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    --glass-blur: 12px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.bg-pattern {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 30%, rgba(22, 119, 255, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(64, 169, 255, 0.06) 0%, transparent 40%),
        radial-gradient(circle at 50% 50%, rgba(22, 119, 255, 0.04) 0%, transparent 60%);
    pointer-events: none;
    z-index: 0;
}

.floating-orbs {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.3;
    animation: float 20s ease-in-out infinite;
}

.orb-1 {
    width: 500px;
    height: 500px;
    background: rgba(22, 119, 255, 0.3);
    top: -150px;
    right: -150px;
    animation-delay: 0s;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: rgba(64, 169, 255, 0.25);
    bottom: 10%;
    left: -100px;
    animation-delay: -7s;
}

.orb-3 {
    width: 300px;
    height: 300px;
    background: rgba(22, 119, 255, 0.2);
    top: 40%;
    right: 5%;
    animation-delay: -14s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    25% {
        transform: translate(30px, -30px) scale(1.05);
    }
    50% {
        transform: translate(-20px, 20px) scale(0.95);
    }
    75% {
        transform: translate(-30px, -20px) scale(1.02);
    }
}

.container {
    position: relative;
    z-index: 1;
    max-width: 1400px;
    margin: 0 auto;
    padding: 80px 40px 0 40px;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 40px;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    z-index: 1000;
    border-bottom: 1px solid rgba(22, 119, 255, 0.1);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    font-size: 28px;
    color: var(--accent-primary);
    text-shadow: 0 0 20px rgba(22, 119, 255, 0.3);
}

.logo-text {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -0.5px;
    color: var(--text-primary);
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all var(--transition-fast);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-normal);
}

.nav-links a:hover {
    color: var(--accent-primary);
}

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

.hero {
    padding: 60px 0 80px;
    text-align: center;
}

.hero-badge {
    display: inline-block;
    padding: 10px 24px;
    background: var(--gradient-glass);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid var(--border-glass);
    border-radius: 100px;
    font-size: 13px;
    color: var(--accent-primary);
    margin-bottom: 32px;
    animation: fadeInUp 0.6s ease;
    box-shadow: var(--shadow-glass);
}

.hero-title {
    font-family: 'Space Grotesk', 'Noto Sans SC', sans-serif;
    font-size: clamp(48px, 8vw, 80px);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 24px;
    animation: fadeInUp 0.6s ease 0.1s backwards;
    color: var(--text-primary);
    text-shadow: 0 1px 0 rgba(255, 255, 255, 0.8);
}

.gradient-text {
    background: linear-gradient(135deg, #0d47a1 0%, #1677ff 50%, #40a9ff 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: none;
    filter: drop-shadow(0 2px 4px rgba(22, 119, 255, 0.3));
}

.hero-desc {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 48px;
    animation: fadeInUp 0.6s ease 0.2s backwards;
}

.hero-stats {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 40px;
    animation: fadeInUp 0.6s ease 0.3s backwards;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 20px 32px;
    background: var(--gradient-glass);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-glass);
}

.stat-number {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 36px;
    font-weight: 700;
    color: var(--accent-primary);
}

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
}

.stat-divider {
    display: none;
}

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

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    font-family: 'Space Grotesk', sans-serif;
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--accent-primary);
    margin-bottom: 16px;
    padding: 6px 16px;
    background: rgba(22, 119, 255, 0.08);
    border-radius: 100px;
}

.section-title {
    font-family: 'Space Grotesk', 'Noto Sans SC', sans-serif;
    font-size: clamp(32px, 5vw, 48px);
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.section-desc {
    font-size: 16px;
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto;
}

.features-section {
    padding: 80px 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    position: relative;
    background: var(--gradient-glass);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-xl);
    padding: 40px 32px;
    transition: all var(--transition-normal);
    overflow: hidden;
    box-shadow: var(--shadow-glass);
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.feature-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1), transparent);
    pointer-events: none;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg), var(--shadow-glow), inset 0 1px 0 rgba(255, 255, 255, 0.8);
    border-color: rgba(22, 119, 255, 0.2);
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-glow);
    border-radius: var(--radius-md);
    margin-bottom: 24px;
    border: 1px solid rgba(22, 119, 255, 0.15);
}

.feature-icon svg {
    width: 28px;
    height: 28px;
    stroke: var(--accent-primary);
}

.feature-number {
    position: absolute;
    top: 24px;
    right: 24px;
    font-family: 'Space Grotesk', sans-serif;
    font-size: 48px;
    font-weight: 700;
    color: rgba(22, 119, 255, 0.06);
}

.feature-title {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.feature-desc {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.7;
}

.feature-list {
    list-style: none;
    margin-bottom: 24px;
}

.feature-list li {
    font-size: 13px;
    color: var(--text-secondary);
    padding: 6px 0;
    padding-left: 20px;
    position: relative;
}

.feature-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent-primary);
}

.feature-preview {
    margin-top: 20px;
}

.preview-card {
    background: rgba(255, 255, 255, 0.5);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid rgba(22, 119, 255, 0.08);
}

.preview-header {
    display: flex;
    gap: 6px;
    padding: 12px 16px;
    background: rgba(22, 119, 255, 0.05);
    border-bottom: 1px solid rgba(22, 119, 255, 0.08);
}

.preview-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.preview-dot.red { background: #ff5f57; }
.preview-dot.yellow { background: #febc2e; }
.preview-dot.green { background: #28c840; }

.preview-content {
    padding: 16px;
}

.todo-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 0;
    font-size: 13px;
    color: var(--text-secondary);
}

.todo-check {
    width: 16px;
    height: 16px;
    border: 2px solid var(--accent-primary);
    border-radius: 4px;
    background: white;
}

.todo-item.completed .todo-check {
    background: var(--accent-emerald);
    border-color: var(--accent-emerald);
}

.todo-item.completed span {
    text-decoration: line-through;
    opacity: 0.5;
}

.knowledge-preview {
    padding: 12px;
}

.knowledge-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: rgba(255, 255, 255, 0.6);
    border-radius: var(--radius-sm);
    margin-bottom: 8px;
    font-size: 13px;
    color: var(--text-secondary);
    border: 1px solid rgba(22, 119, 255, 0.06);
}

.knowledge-icon {
    font-size: 18px;
}

.chat-preview {
    padding: 12px;
}

.chat-bubble {
    padding: 10px 14px;
    border-radius: var(--radius-md);
    font-size: 12px;
    margin-bottom: 8px;
    max-width: 85%;
}

.chat-bubble.user {
    background: var(--accent-primary);
    color: white;
    margin-left: auto;
}

.chat-bubble.ai {
    background: rgba(22, 119, 255, 0.08);
    color: var(--text-secondary);
}

.tech-section {
    padding: 80px 0;
    background: linear-gradient(180deg, rgba(22, 119, 255, 0.03) 0%, transparent 100%);
    margin: 0 -40px;
    padding-left: 40px;
    padding-right: 40px;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.tech-category {
    background: var(--gradient-glass);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: var(--shadow-glass);
}

.tech-cat-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid rgba(22, 119, 255, 0.1);
    color: var(--text-primary);
}

.tech-items {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.tech-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.5);
    border-radius: var(--radius-sm);
    font-size: 14px;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}

.tech-item:hover {
    background: rgba(22, 119, 255, 0.08);
    color: var(--accent-primary);
    border-color: rgba(22, 119, 255, 0.15);
}

.tech-icon {
    font-size: 18px;
}

.innovation-section {
    padding: 80px 0;
}

.innovation-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
    max-width: 900px;
    margin: 0 auto;
}

.innovation-item {
    display: flex;
    gap: 24px;
    padding: 32px;
    background: var(--gradient-glass);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-glass);
}

.innovation-item:hover {
    transform: translateX(8px);
    box-shadow: var(--shadow-md), var(--shadow-glow);
    border-color: rgba(22, 119, 255, 0.2);
}

.innovation-icon {
    font-size: 40px;
    flex-shrink: 0;
}

.innovation-content h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.innovation-content p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.preview-section {
    padding: 80px 0;
}

.preview-tabs {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 40px;
}

.preview-tab {
    padding: 12px 28px;
    background: var(--gradient-glass);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid var(--border-glass);
    border-radius: 100px;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.preview-tab:hover {
    border-color: rgba(22, 119, 255, 0.2);
    color: var(--accent-primary);
}

.preview-tab.active {
    background: var(--gradient-primary);
    border-color: transparent;
    color: white;
    box-shadow: var(--shadow-glow);
}

.preview-frames {
    position: relative;
}

.preview-frame {
    display: none;
    background: var(--gradient-glass);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg), var(--shadow-glass);
}

.preview-frame.active {
    display: block;
    animation: fadeIn 0.4s ease;
}

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

.frame-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    background: rgba(22, 119, 255, 0.05);
    border-bottom: 1px solid rgba(22, 119, 255, 0.08);
}

.frame-dots {
    display: flex;
    gap: 8px;
}

.frame-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(22, 119, 255, 0.2);
}

.frame-dots span:first-child { background: #ff5f57; }
.frame-dots span:nth-child(2) { background: #febc2e; }
.frame-dots span:last-child { background: #28c840; }

.frame-title {
    font-size: 13px;
    color: var(--text-secondary);
}

.frame-content {
    display: flex;
    min-height: 500px;
}

.todo-frame {
    display: flex;
}

.todo-sidebar {
    width: 200px;
    padding: 20px;
    background: rgba(22, 119, 255, 0.03);
    border-right: 1px solid rgba(22, 119, 255, 0.08);
}

.sidebar-item {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 8px;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}

.sidebar-item:hover,
.sidebar-item.active {
    background: rgba(22, 119, 255, 0.08);
    color: var(--accent-primary);
}

.sidebar-item.active {
    background: var(--gradient-glow);
    border-color: rgba(22, 119, 255, 0.2);
}

.todo-main {
    flex: 1;
    padding: 20px;
    background: rgba(255, 255, 255, 0.3);
}

.info-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

.info-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background: rgba(255, 255, 255, 0.6);
    border-radius: var(--radius-md);
    border: 1px solid rgba(22, 119, 255, 0.08);
}

.info-icon {
    font-size: 24px;
}

.info-text {
    display: flex;
    flex-direction: column;
}

.info-title {
    font-size: 11px;
    color: var(--text-tertiary);
}

.info-value {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.todo-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.todo-card {
    padding: 20px;
    background: rgba(255, 255, 255, 0.7);
    border: 1px solid rgba(22, 119, 255, 0.08);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.todo-card:hover {
    background: rgba(255, 255, 255, 0.9);
    border-color: rgba(22, 119, 255, 0.15);
    box-shadow: var(--shadow-sm);
}

.card-tag {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 100px;
    font-size: 11px;
    font-weight: 500;
    margin-bottom: 12px;
}

.card-tag.urgent {
    background: rgba(255, 77, 79, 0.1);
    color: var(--accent-rose);
}

.card-tag.normal {
    background: rgba(22, 119, 255, 0.1);
    color: var(--accent-primary);
}

.card-tag.low {
    background: rgba(82, 196, 26, 0.1);
    color: var(--accent-emerald);
}

.todo-card h5 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.todo-card p {
    font-size: 13px;
    color: var(--text-tertiary);
    margin-bottom: 12px;
}

.card-meta {
    display: flex;
    gap: 16px;
    font-size: 12px;
    color: var(--text-tertiary);
}

.knowledge-frame {
    display: flex;
}

.knowledge-sidebar {
    width: 220px;
    padding: 20px;
    background: rgba(22, 119, 255, 0.03);
    border-right: 1px solid rgba(22, 119, 255, 0.08);
}

.search-box {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.6);
    border: 1px solid rgba(22, 119, 255, 0.1);
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
}

.search-box input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    font-size: 13px;
    color: var(--text-primary);
}

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

.category-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.category-item {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}

.category-item:hover,
.category-item.active {
    background: rgba(22, 119, 255, 0.08);
    color: var(--accent-primary);
}

.category-item.active {
    background: var(--gradient-glow);
    border-color: rgba(22, 119, 255, 0.2);
}

.knowledge-main {
    flex: 1;
    padding: 20px;
    background: rgba(255, 255, 255, 0.3);
}

.ai-assistant {
    background: var(--gradient-glow);
    border: 1px solid rgba(22, 119, 255, 0.2);
    border-radius: var(--radius-md);
    padding: 16px;
    margin-bottom: 24px;
}

.ai-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
}

.ai-status {
    font-size: 11px;
    color: var(--accent-emerald);
    background: rgba(82, 196, 26, 0.1);
    padding: 2px 8px;
    border-radius: 100px;
}

.ai-input {
    display: flex;
    gap: 12px;
}

.ai-input input {
    flex: 1;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid rgba(22, 119, 255, 0.1);
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--text-primary);
}

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

.knowledge-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.knowledge-card {
    padding: 20px;
    background: rgba(255, 255, 255, 0.7);
    border: 1px solid rgba(22, 119, 255, 0.08);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.knowledge-card:hover {
    background: rgba(255, 255, 255, 0.9);
    border-color: rgba(22, 119, 255, 0.15);
}

.k-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.k-icon {
    font-size: 20px;
}

.k-tag {
    font-size: 11px;
    padding: 4px 10px;
    background: rgba(22, 119, 255, 0.1);
    color: var(--accent-primary);
    border-radius: 100px;
}

.knowledge-card h5 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.knowledge-card p {
    font-size: 12px;
    color: var(--text-tertiary);
    margin-bottom: 12px;
    line-height: 1.6;
}

.k-meta {
    font-size: 11px;
    color: var(--text-tertiary);
}

.chat-frame {
    display: flex;
}

.chat-sidebar {
    width: 200px;
    padding: 20px;
    background: rgba(22, 119, 255, 0.03);
    border-right: 1px solid rgba(22, 119, 255, 0.08);
}

.chat-new-btn {
    padding: 12px 16px;
    background: var(--gradient-primary);
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    margin-bottom: 20px;
    transition: all var(--transition-fast);
    color: white;
}

.chat-new-btn:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-glow);
}

.chat-history {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.chat-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}

.chat-item:hover,
.chat-item.active {
    background: rgba(22, 119, 255, 0.08);
    color: var(--accent-primary);
}

.chat-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: rgba(255, 255, 255, 0.3);
}

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

.message {
    display: flex;
    gap: 12px;
}

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

.msg-avatar {
    width: 32px;
    height: 32px;
    background: var(--gradient-primary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 600;
    flex-shrink: 0;
    color: white;
}

.msg-content {
    padding: 14px 18px;
    border-radius: var(--radius-md);
    font-size: 13px;
    line-height: 1.6;
    max-width: 70%;
}

.user-msg .msg-content {
    background: var(--accent-primary);
    color: white;
}

.ai-msg .msg-content {
    background: rgba(22, 119, 255, 0.08);
    color: var(--text-secondary);
}

.chat-input-area {
    padding: 20px;
    border-top: 1px solid rgba(22, 119, 255, 0.08);
    display: flex;
    gap: 12px;
    background: rgba(255, 255, 255, 0.5);
}

.chat-input-area input {
    flex: 1;
    padding: 14px 18px;
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid rgba(22, 119, 255, 0.1);
    border-radius: var(--radius-md);
    font-size: 14px;
    color: var(--text-primary);
}

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

.chat-actions {
    display: flex;
    gap: 8px;
}

.export-btn,
.send-btn {
    padding: 14px 24px;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.export-btn {
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid rgba(22, 119, 255, 0.15);
    color: var(--text-secondary);
}

.export-btn:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.send-btn {
    background: var(--gradient-primary);
    border: none;
    color: white;
}

.send-btn:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-glow);
}

.footer {
    padding: 40px 0;
    border-top: 1px solid rgba(22, 119, 255, 0.08);
    margin-top: 80px;
    background: rgba(255, 255, 255, 0.3);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.footer-brand .logo-icon {
    font-size: 22px;
}

.footer-info {
    display: flex;
    gap: 32px;
    font-size: 13px;
    color: var(--text-tertiary);
}

@media (max-width: 1200px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .tech-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 900px) {
    .container {
        padding: 100px 20px 0 20px;
    }
    
    .navbar {
        flex-direction: column;
        gap: 12px;
        padding: 12px 20px;
    }
    
    .nav-links {
        gap: 16px;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .nav-links a {
        font-size: 13px;
    }
    
    .features-grid,
    .tech-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-stats {
        flex-wrap: wrap;
        gap: 16px;
    }
    
    .stat-item {
        padding: 16px 24px;
    }
    
    .frame-content {
        flex-direction: column;
    }
    
    .todo-sidebar,
    .knowledge-sidebar,
    .chat-sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid rgba(22, 119, 255, 0.08);
    }
    
    .info-cards,
    .todo-grid,
    .knowledge-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
    
    .footer-info {
        flex-direction: column;
        gap: 8px;
    }
    
    .tech-section {
        margin: 0 -20px;
        padding-left: 20px;
        padding-right: 20px;
    }
}