/* ==========================================
   天衍智投 - TianYan AI Trading Platform
   Design System & Styles
   ========================================== */

/* === CSS Custom Properties === */
:root {
    --color-bg: #0a0a0f;
    --color-bg-secondary: #0f0f1a;
    --color-bg-card: rgba(15, 15, 30, 0.7);
    --color-bg-card-hover: rgba(25, 25, 50, 0.8);
    --color-surface: rgba(255, 255, 255, 0.03);
    --color-border: rgba(255, 255, 255, 0.06);
    --color-border-hover: rgba(255, 255, 255, 0.12);
    --color-text: #e4e4e7;
    --color-text-secondary: #a1a1aa;
    --color-text-muted: #71717a;
    --color-primary: #6366f1;
    --color-primary-light: #818cf8;
    --color-accent: #a855f7;
    --color-cyan: #06b6d4;
    --color-green: #22c55e;
    --color-red: #ef4444;
    --color-amber: #f59e0b;
    --gradient-primary: linear-gradient(135deg, #6366f1, #a855f7, #06b6d4);
    --gradient-text: linear-gradient(135deg, #818cf8, #c084fc, #22d3ee);
    --gradient-card: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(168, 85, 247, 0.05));
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 64px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.15);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --font-sans: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'Orbitron', 'Courier New', monospace;
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* === Reset & Base === */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

::selection {
    background: rgba(99, 102, 241, 0.3);
    color: white;
}

/* === Background Canvas === */
#bgCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* === Typography === */
h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.text-gradient {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* === Layout === */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    position: relative;
    padding: 120px 0;
    z-index: 1;
}

.section-dark {
    background: var(--color-bg-secondary);
}

.section-dark::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-border), transparent);
}

.section-dark::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-border), transparent);
}

/* === Section Header === */
.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    color: var(--color-primary-light);
    padding: 6px 16px;
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: 100px;
    margin-bottom: 24px;
    text-transform: uppercase;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: 20px;
    color: white;
}

.section-subtitle {
    font-size: 1.05rem;
    color: var(--color-text-secondary);
    max-width: 640px;
    margin: 0 auto;
    line-height: 1.8;
}

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 500;
    font-family: var(--font-sans);
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    border: none;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 24px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(99, 102, 241, 0.4);
}

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

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

.btn-outline {
    background: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-border);
    backdrop-filter: blur(10px);
}

.btn-outline:hover {
    border-color: var(--color-primary);
    color: var(--color-primary-light);
    background: rgba(99, 102, 241, 0.05);
    transform: translateY(-2px);
}

.btn-full {
    width: 100%;
    justify-content: center;
}

/* === Navigation === */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: all var(--transition-base);
}

.navbar.scrolled {
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--color-border);
    padding: 10px 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: white;
}

.logo-icon {
    width: 36px;
    height: 36px;
}

.logo-icon svg {
    width: 100%;
    height: 100%;
}

.logo-text {
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: 0.05em;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 4px;
}

.nav-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.88rem;
    font-weight: 400;
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: white;
    background: rgba(255, 255, 255, 0.05);
}

.lang-switch {
    font-weight: 600 !important;
    color: var(--color-primary-light) !important;
    border: 1px solid rgba(99, 102, 241, 0.3) !important;
    border-radius: 6px !important;
    padding: 4px 12px !important;
    font-size: 0.82rem !important;
}

.lang-switch:hover {
    background: rgba(99, 102, 241, 0.15) !important;
    border-color: var(--color-primary) !important;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

/* === Hero Section === */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 24px 80px;
    z-index: 1;
    gap: 60px;
    max-width: 1200px;
    margin: 0 auto;
}

.hero-content {
    flex: 1;
    max-width: 640px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.15em;
    color: var(--color-primary-light);
    padding: 8px 18px;
    border: 1px solid rgba(99, 102, 241, 0.25);
    border-radius: 100px;
    margin-bottom: 32px;
    background: rgba(99, 102, 241, 0.05);
    text-transform: uppercase;
}

.badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-green);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

.hero-title {
    margin-bottom: 24px;
}

.title-line {
    display: block;
    font-size: clamp(2.8rem, 6vw, 4.5rem);
    font-weight: 900;
    color: white;
    letter-spacing: 0.05em;
    line-height: 1.1;
}

.title-sub {
    display: block;
    font-size: clamp(1rem, 2.5vw, 1.4rem);
    font-weight: 400;
    color: var(--color-text-secondary);
    margin-top: 12px;
    letter-spacing: 0.02em;
}

.hero-description {
    font-size: 1.05rem;
    color: var(--color-text-secondary);
    margin-bottom: 40px;
    line-height: 1.9;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 60px;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    gap: 48px;
}

.stat-item {
    position: relative;
}

.stat-item::after {
    content: '';
    position: absolute;
    right: -24px;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 40px;
    background: var(--color-border);
}

.stat-item:last-child::after {
    display: none;
}

.stat-number {
    font-family: var(--font-mono);
    font-size: 1.8rem;
    font-weight: 700;
    color: white;
}

.stat-suffix {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--color-primary-light);
    margin-left: 2px;
}

.stat-label {
    display: block;
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-top: 4px;
}

/* === Hero Visual === */
.hero-visual {
    flex: 0 0 400px;
}

.trading-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

.card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.card-status {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    font-weight: 700;
    padding: 3px 10px;
    border-radius: 100px;
    letter-spacing: 0.1em;
}

.card-status.live {
    background: rgba(34, 197, 94, 0.15);
    color: var(--color-green);
    border: 1px solid rgba(34, 197, 94, 0.3);
}

.card-pair {
    font-weight: 600;
    font-size: 1.1rem;
    color: white;
    flex: 1;
}

.card-change {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 600;
}

.card-change.positive {
    color: var(--color-green);
}

.card-change.negative {
    color: var(--color-red);
}

.card-chart {
    height: 180px;
    margin-bottom: 20px;
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-sm);
}

.card-metrics {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.metric {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    background: var(--color-surface);
}

.metric-label {
    font-size: 0.82rem;
    color: var(--color-text-muted);
}

.metric-value {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--color-text);
}

.metric-value.bullish {
    color: var(--color-green);
}

/* === Scroll Indicator === */
.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.scroll-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--color-text-muted);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
}

.scroll-arrow {
    width: 20px;
    height: 30px;
    border: 2px solid var(--color-text-muted);
    border-radius: 10px;
    position: relative;
}

.scroll-arrow::before {
    content: '';
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    width: 3px;
    height: 8px;
    background: var(--color-text-muted);
    border-radius: 2px;
    animation: scrollBounce 2s ease-in-out infinite;
}

@keyframes scrollBounce {
    0%, 100% { transform: translateX(-50%) translateY(0); opacity: 1; }
    50% { transform: translateX(-50%) translateY(6px); opacity: 0.3; }
}

/* === About Section === */
.about-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.about-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.about-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.about-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-border-hover);
    box-shadow: var(--shadow-md), var(--shadow-glow);
}

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

.about-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 24px;
}

.about-icon svg {
    width: 100%;
    height: 100%;
}

.about-card h3 {
    font-size: 1.3rem;
    color: white;
    margin-bottom: 12px;
}

.about-card p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    line-height: 1.8;
}

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

.feature-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-border-hover);
    box-shadow: var(--shadow-md);
}

.feature-card.feature-large {
    grid-column: span 3;
    display: grid;
    grid-template-columns: auto 1fr;
    grid-template-rows: auto auto auto;
    gap: 0 28px;
    padding: 40px 36px;
    background: var(--gradient-card);
}

.feature-card.feature-large .feature-number {
    grid-row: 1;
    grid-column: 1;
}

.feature-card.feature-large .feature-icon {
    grid-row: 2 / 4;
    grid-column: 1;
    align-self: center;
}

.feature-card.feature-large h3 {
    grid-row: 1;
    grid-column: 2;
    align-self: end;
}

.feature-card.feature-large p {
    grid-row: 2;
    grid-column: 2;
}

.feature-card.feature-large .feature-tags {
    grid-row: 3;
    grid-column: 2;
}

.feature-number {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--color-text-muted);
    margin-bottom: 20px;
    letter-spacing: 0.1em;
}

.feature-icon {
    width: 64px;
    height: 64px;
    margin-bottom: 20px;
}

.feature-icon svg {
    width: 100%;
    height: 100%;
}

.feature-card h3 {
    font-size: 1.15rem;
    color: white;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    line-height: 1.8;
    margin-bottom: 16px;
}

.feature-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.tag {
    font-size: 0.72rem;
    padding: 4px 12px;
    border-radius: 100px;
    background: rgba(99, 102, 241, 0.1);
    color: var(--color-primary-light);
    border: 1px solid rgba(99, 102, 241, 0.2);
    font-weight: 500;
}

/* === Technology Section === */
.tech-architecture {
    margin-bottom: 60px;
}

.arch-layer {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px;
}

.layer-label {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--color-primary-light);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: 20px;
    text-align: center;
}

.layer-items {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.tech-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 20px 24px;
    border-radius: var(--radius-md);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
    min-width: 120px;
    text-align: center;
}

.tech-item:hover {
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.15);
}

.tech-item.highlight {
    border-color: rgba(168, 85, 247, 0.3);
    background: rgba(168, 85, 247, 0.05);
}

.tech-item.highlight:hover {
    border-color: var(--color-accent);
    box-shadow: 0 4px 20px rgba(168, 85, 247, 0.2);
}

.tech-icon {
    font-size: 1.8rem;
}

.tech-item span {
    font-size: 0.82rem;
    color: var(--color-text-secondary);
    line-height: 1.4;
}

.arch-connector {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 8px 0;
    color: var(--color-text-muted);
}

.connector-line {
    width: 2px;
    height: 16px;
    background: linear-gradient(to bottom, var(--color-border), var(--color-primary));
}

.connector-arrow {
    width: 20px;
    height: 20px;
}

/* === Tech Details === */
.tech-details {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.tech-detail-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 36px;
    transition: all var(--transition-base);
}

.tech-detail-card:hover {
    border-color: var(--color-border-hover);
    box-shadow: var(--shadow-md);
}

.tech-detail-card h3 {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.1rem;
    color: white;
    margin-bottom: 16px;
}

.tech-detail-card h3 svg {
    color: var(--color-primary-light);
    flex-shrink: 0;
}

.tech-detail-card p {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    line-height: 1.8;
    margin-bottom: 20px;
}

.detail-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.detail-list li {
    position: relative;
    padding-left: 20px;
    font-size: 0.88rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.detail-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--gradient-primary);
}

/* === Charts Section === */
.chart-showcase {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 24px;
}

.chart-demo {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    position: relative;
}

.chart-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 20px;
    border-bottom: 1px solid var(--color-border);
}

.toolbar-left {
    display: flex;
    gap: 4px;
}

.toolbar-btn {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    padding: 6px 14px;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--color-text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.toolbar-btn:hover {
    color: var(--color-text);
    background: var(--color-surface);
}

.toolbar-btn.active {
    color: var(--color-primary-light);
    border-color: rgba(99, 102, 241, 0.3);
    background: rgba(99, 102, 241, 0.1);
}

.toolbar-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.78rem;
    color: var(--color-green);
}

.indicator-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-green);
    animation: pulse 2s ease-in-out infinite;
}

#demoChart {
    width: 100%;
    display: block;
}

.chart-overlay-info {
    display: flex;
    gap: 24px;
    padding: 12px 20px;
    border-top: 1px solid var(--color-border);
}

.overlay-item {
    display: flex;
    align-items: center;
    gap: 8px;
}

.overlay-label {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--color-text-muted);
}

.overlay-value {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 600;
}

/* === Chart Signals === */
.chart-signals {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 24px;
}

.chart-signals h3 {
    font-size: 0.95rem;
    color: white;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--color-border);
}

.signal-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.signal-item {
    display: flex;
    gap: 12px;
    padding: 12px;
    border-radius: var(--radius-sm);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    transition: all var(--transition-fast);
}

.signal-item:hover {
    border-color: var(--color-border-hover);
}

.signal-icon {
    font-size: 0.9rem;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    flex-shrink: 0;
}

.signal-item.buy .signal-icon {
    background: rgba(34, 197, 94, 0.1);
    color: var(--color-green);
}

.signal-item.sell .signal-icon {
    background: rgba(239, 68, 68, 0.1);
    color: var(--color-red);
}

.signal-item.hold .signal-icon {
    background: rgba(245, 158, 11, 0.1);
    color: var(--color-amber);
}

.signal-info {
    flex: 1;
    min-width: 0;
}

.signal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 4px;
}

.signal-type {
    font-size: 0.82rem;
    font-weight: 600;
    color: white;
}

.signal-time {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: var(--color-text-muted);
}

.signal-detail {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
}

/* === Team Section === */
.team-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.team-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 40px 28px;
    text-align: center;
    transition: all var(--transition-base);
}

.team-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-border-hover);
    box-shadow: var(--shadow-md);
}

.team-avatar {
    width: 100px;
    height: 100px;
    margin: 0 auto 24px;
    border-radius: 50%;
    overflow: hidden;
    border: 2px solid var(--color-border);
}

.avatar-placeholder svg {
    width: 100%;
    height: 100%;
}

.team-card h3 {
    font-size: 1.15rem;
    color: white;
    margin-bottom: 4px;
}

.team-role {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--color-primary-light);
    letter-spacing: 0.1em;
    margin-bottom: 16px;
}

.team-desc {
    font-size: 0.88rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* === Contact Section === */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.contact-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.contact-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.2);
    color: var(--color-primary-light);
    flex-shrink: 0;
}

.contact-item h4 {
    font-size: 0.95rem;
    color: white;
    margin-bottom: 4px;
}

.contact-item p {
    font-size: 0.88rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 0.82rem;
    color: var(--color-text-secondary);
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    transition: all var(--transition-fast);
    outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

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

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2371717a' viewBox='0 0 16 16'%3E%3Cpath d='M8 12L2 6h12z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 40px;
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

/* === Footer === */
.footer {
    position: relative;
    z-index: 1;
    background: var(--color-bg);
    border-top: 1px solid var(--color-border);
}

.footer-top {
    display: flex;
    justify-content: space-between;
    gap: 60px;
    padding: 60px 0 40px;
}

.footer-brand {
    max-width: 300px;
}

.footer-desc {
    font-size: 0.88rem;
    color: var(--color-text-muted);
    margin-top: 16px;
    line-height: 1.7;
}

.footer-links {
    display: flex;
    gap: 60px;
}

.footer-col {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-col h4 {
    font-size: 0.88rem;
    color: white;
    margin-bottom: 4px;
}

.footer-col a {
    font-size: 0.82rem;
    color: var(--color-text-muted);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-col a:hover {
    color: var(--color-primary-light);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 0;
    border-top: 1px solid var(--color-border);
    font-size: 0.78rem;
    color: var(--color-text-muted);
}

.footer-legal {
    display: flex;
    gap: 24px;
}

.footer-legal a {
    color: var(--color-text-muted);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-legal a:hover {
    color: var(--color-primary-light);
}

/* === Animations === */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.animate-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* === Responsive === */
@media (max-width: 1024px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding-top: 140px;
    }
    
    .hero-visual {
        flex: 0 0 auto;
        width: 100%;
        max-width: 420px;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .feature-card.feature-large {
        grid-column: span 2;
    }
    
    .chart-showcase {
        grid-template-columns: 1fr;
    }
    
    .tech-details {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background: rgba(10, 10, 15, 0.95);
        backdrop-filter: blur(20px);
        padding: 16px 24px;
        border-bottom: 1px solid var(--color-border);
    }
    
    .nav-links.open {
        display: flex;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .section {
        padding: 80px 0;
    }
    
    .section-header {
        margin-bottom: 48px;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .feature-card.feature-large {
        grid-column: span 1;
        grid-template-columns: 1fr;
    }
    
    .feature-card.feature-large .feature-icon {
        grid-row: auto;
        grid-column: auto;
    }
    
    .feature-card.feature-large .feature-number,
    .feature-card.feature-large h3,
    .feature-card.feature-large p,
    .feature-card.feature-large .feature-tags {
        grid-column: 1;
        grid-row: auto;
    }
    
    .team-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 24px;
        align-items: center;
    }
    
    .stat-item::after {
        display: none;
    }
    
    .chart-overlay-info {
        flex-wrap: wrap;
        gap: 12px;
    }
    
    .footer-top {
        flex-direction: column;
        gap: 40px;
    }
    
    .footer-links {
        gap: 32px;
        flex-wrap: wrap;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero {
        padding-top: 120px;
    }
    
    .title-line {
        font-size: 2.4rem;
    }
    
    .hero-description br {
        display: none;
    }
    
    .trading-card {
        padding: 16px;
    }
    
    .layer-items {
        gap: 12px;
    }
    
    .tech-item {
        min-width: 100px;
        padding: 14px 16px;
    }
}