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

:root {
    --bg-primary: #0a0b0e;
    --bg-secondary: #14151a;
    --bg-card: #1a1c23;
    --bg-card-hover: #21232b;
    --border-color: #2a2d36;
    --border-color-light: #3a3e4a;
    --text-primary: #f0f1f5;
    --text-secondary: #a0a4b0;
    --text-muted: #6c7280;
    --accent-gold: #d4a853;
    --accent-gold-light: #f0c96b;
    --accent-green: #00c853;
    --accent-red: #ff3d57;
    --accent-blue: #3b82f6;
    --accent-purple: #8b5cf6;
    --shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.3);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: all 0.3s ease;
    --font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
}

/* Light Theme */
[data-theme="light"] {
    --bg-primary: #f5f6f8;
    --bg-secondary: #ffffff;
    --bg-card: #ffffff;
    --bg-card-hover: #f0f1f5;
    --border-color: #e2e4ea;
    --border-color-light: #d0d3dc;
    --text-primary: #1a1c23;
    --text-secondary: #5a5e6a;
    --text-muted: #8a8e98;
    --accent-gold: #c89530;
    --accent-gold-light: #d4a853;
    --accent-green: #00a840;
    --accent-red: #e63350;
    --shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.08);
}

html {
    scroll-behavior: smooth;
}

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

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 11, 14, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(42, 45, 54, 0.5);
    transition: var(--transition);
}

[data-theme="light"] .navbar {
    background: rgba(255, 255, 255, 0.9);
    border-bottom: 1px solid rgba(226, 228, 234, 0.8);
}

.navbar.scrolled {
    background: rgba(10, 11, 14, 0.95);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

[data-theme="light"] .navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 1.1rem;
    color: var(--text-primary);
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--accent-gold) 0%, var(--accent-gold-light) 100%);
    color: var(--bg-primary);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
    font-size: 1.2rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 36px;
}

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover {
    color: var(--text-primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-gold), var(--accent-gold-light));
    transition: var(--transition);
}

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

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

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
}

/* Theme Toggle Button */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition);
    flex-shrink: 0;
}

.theme-toggle:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent-gold);
    color: var(--accent-gold-light);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
}

.theme-toggle .icon-sun {
    display: none;
}

[data-theme="light"] .theme-toggle .icon-moon {
    display: none;
}

[data-theme="light"] .theme-toggle .icon-sun {
    display: block;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding: 120px 0 80px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 20% 30%, rgba(212, 168, 83, 0.12) 0%, transparent 40%),
                radial-gradient(circle at 80% 70%, rgba(0, 200, 83, 0.08) 0%, transparent 40%);
    z-index: 0;
}

[data-theme="light"] .hero-bg {
    background: radial-gradient(circle at 20% 30%, rgba(200, 149, 48, 0.1) 0%, transparent 40%),
                radial-gradient(circle at 80% 70%, rgba(0, 168, 64, 0.06) 0%, transparent 40%);
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image: linear-gradient(rgba(42, 45, 54, 0.15) 1px, transparent 1px),
                      linear-gradient(90deg, rgba(42, 45, 54, 0.15) 1px, transparent 1px);
    background-size: 60px 60px;
    z-index: 0;
    mask-image: radial-gradient(circle at center, black 0%, transparent 70%);
    -webkit-mask-image: radial-gradient(circle at center, black 0%, transparent 70%);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(212, 168, 83, 0.1);
    border: 1px solid rgba(212, 168, 83, 0.25);
    color: var(--accent-gold-light);
    padding: 8px 18px;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 28px;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--accent-green);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.7; transform: scale(1.2); }
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.text-gradient {
    background: linear-gradient(135deg, var(--accent-gold) 0%, var(--accent-gold-light) 50%, var(--accent-green) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 60px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-family: inherit;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-gold) 0%, var(--accent-gold-light) 100%);
    color: var(--bg-primary);
    box-shadow: 0 8px 30px rgba(212, 168, 83, 0.25);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(212, 168, 83, 0.35);
}

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

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--accent-gold);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color-light);
}

.btn-outline:hover {
    background: var(--accent-gold);
    color: var(--bg-primary);
    border-color: var(--accent-gold);
}

.btn-block {
    width: 100%;
    margin-top: auto;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    padding: 30px;
    background: rgba(20, 21, 26, 0.7);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    backdrop-filter: blur(10px);
}

[data-theme="light"] .hero-stats {
    background: rgba(255, 255, 255, 0.85);
}

.stat-item {
    text-align: center;
}

.stat-value {
    font-size: 2rem;
    font-weight: 800;
    color: var(--accent-gold-light);
    line-height: 1;
    margin-bottom: 8px;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.hero-scroll {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: var(--text-muted);
    font-size: 0.85rem;
    z-index: 1;
}

.scroll-indicator {
    width: 20px;
    height: 32px;
    border: 2px solid var(--text-muted);
    border-radius: 10px;
    position: relative;
}

.scroll-indicator::after {
    content: '';
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--text-muted);
    border-radius: 2px;
    animation: scrollDown 1.5s infinite;
}

@keyframes scrollDown {
    0%, 100% { top: 6px; opacity: 1; }
    50% { top: 16px; opacity: 0.3; }
}

/* Section Styles */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
}

.section-tag {
    display: inline-block;
    background: rgba(212, 168, 83, 0.1);
    color: var(--accent-gold-light);
    padding: 6px 16px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 16px;
    border: 1px solid rgba(212, 168, 83, 0.2);
}

.section-title {
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    font-weight: 800;
    margin-bottom: 16px;
    line-height: 1.2;
}

.section-desc {
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.7;
}

/* Features */
.features {
    background: var(--bg-secondary);
}

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

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

.feature-card:hover {
    transform: translateY(-5px);
    background: var(--bg-card-hover);
    border-color: var(--border-color-light);
    box-shadow: var(--shadow-card);
}

.feature-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--bg-primary);
}

.icon-arbitrage { background: linear-gradient(135deg, var(--accent-green), #00e676); }
.icon-hedge { background: linear-gradient(135deg, var(--accent-blue), #60a5fa); }
.icon-quote { background: linear-gradient(135deg, var(--accent-purple), #a78bfa); }
.icon-convert { background: linear-gradient(135deg, #f59e0b, #fbbf24); }
.icon-fast { background: linear-gradient(135deg, var(--accent-red), #ff6b7a); }
.icon-multi { background: linear-gradient(135deg, #06b6d4, #22d3ee); }

.feature-card h3 {
    font-size: 1.2rem;
    margin-bottom: 12px;
    font-weight: 700;
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.95rem;
}

/* Screenshots */
.screenshots {
    background: var(--bg-primary);
}

.screenshots-slider {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
}

.screenshots-track {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
    aspect-ratio: 16 / 9;
    background: var(--bg-card);
}

.screenshot-item {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 0.5s ease;
    display: flex;
    flex-direction: column;
}

.screenshot-item.active {
    opacity: 1;
}

.screenshot-item img {
    width: 100%;
    height: calc(100% - 48px);
    object-fit: cover;
    object-position: top;
}

.screenshot-caption {
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    color: var(--text-secondary);
    font-size: 0.95rem;
    border-top: 1px solid var(--border-color);
}

.screenshots-nav {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 24px;
}

.screenshot-btn {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--border-color-light);
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.screenshot-btn.active {
    background: var(--accent-gold);
    width: 32px;
    border-radius: 6px;
}

.slider-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: rgba(20, 21, 26, 0.9);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    z-index: 10;
}

.slider-arrow:hover {
    background: var(--accent-gold);
    color: var(--bg-primary);
    border-color: var(--accent-gold);
}

.slider-prev { left: -24px; }
.slider-next { right: -24px; }

/* Download / Pricing */
.download {
    background: var(--bg-secondary);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    max-width: 800px;
    margin: 0 auto;
}

.pricing-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 36px;
    display: flex;
    flex-direction: column;
    transition: var(--transition);
    position: relative;
}

.pricing-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-card);
}

.pricing-card.featured {
    border-color: var(--accent-gold);
    background: linear-gradient(180deg, rgba(212, 168, 83, 0.08) 0%, var(--bg-card) 100%);
    transform: scale(1.02);
}

.pricing-card.featured:hover {
    transform: scale(1.02) translateY(-5px);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    right: 24px;
    background: linear-gradient(135deg, var(--accent-gold), var(--accent-gold-light));
    color: var(--bg-primary);
    padding: 6px 16px;
    border-radius: 50px;
    font-weight: 700;
    font-size: 0.85rem;
}

.pricing-header {
    margin-bottom: 20px;
}

.pricing-header h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.pricing-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.pricing-price {
    margin-bottom: 28px;
    display: flex;
    align-items: baseline;
    gap: 4px;
}

.price {
    font-size: 2.8rem;
    font-weight: 900;
    color: var(--accent-gold-light);
}

.price-unit {
    color: var(--text-secondary);
    font-size: 1rem;
}

.pricing-features {
    list-style: none;
    margin-bottom: 32px;
    flex-grow: 1;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 0;
    color: var(--text-secondary);
    border-bottom: 1px solid rgba(42, 45, 54, 0.5);
}

.pricing-features li:last-child {
    border-bottom: none;
}

.check-icon {
    color: var(--accent-green);
    font-weight: 700;
    flex-shrink: 0;
}

.pricing-note {
    text-align: center;
    margin-top: 12px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.pricing-note strong,
.pricing-note .highlight {
    color: var(--accent-gold-light);
}

.download-note {
    text-align: center;
    margin-top: 24px;
    padding: 20px;
    background: rgba(212, 168, 83, 0.05);
    border: 1px solid rgba(212, 168, 83, 0.15);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
}

.download-note strong {
    color: var(--accent-gold-light);
}

.download-action {
    text-align: center;
    margin-top: 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.btn-large {
    font-size: 1.15rem;
    padding: 16px 40px;
    gap: 10px;
}

.download-url {
    color: var(--text-muted);
    font-size: 0.85rem;
    font-family: 'Inter', monospace;
    word-break: break-all;
}

/* FAQ */
.faq {
    background: var(--bg-primary);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    margin-bottom: 12px;
    overflow: hidden;
    background: var(--bg-card);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.05rem;
    font-weight: 600;
    cursor: pointer;
    text-align: left;
    font-family: inherit;
    transition: var(--transition);
}

.faq-question:hover {
    background: var(--bg-card-hover);
}

.faq-icon {
    transition: transform 0.3s ease;
    flex-shrink: 0;
    color: var(--text-secondary);
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    padding: 0 24px;
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding: 0 24px 20px;
}

.faq-answer p {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* Contact */
.contact {
    background: var(--bg-secondary);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 40px;
    align-items: start;
}

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

.contact-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.contact-card:hover {
    border-color: var(--border-color-light);
    background: var(--bg-card-hover);
}

.contact-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: rgba(212, 168, 83, 0.1);
    color: var(--accent-gold-light);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-detail h4 {
    font-size: 1rem;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.contact-detail p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.qr-codes {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.qr-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 20px;
    text-align: center;
    transition: var(--transition);
}

.qr-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-gold);
}

.qr-card img {
    width: 100%;
    aspect-ratio: 1;
    object-fit: contain;
    border-radius: var(--radius-sm);
    margin-bottom: 12px;
}

.qr-card .qr-label {
    display: block;
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    margin-bottom: 4px;
}

.qr-card .qr-account {
    display: block;
    color: var(--text-primary);
    font-size: 1.05rem;
    font-weight: 700;
    font-family: 'Inter', monospace;
    letter-spacing: 0.5px;
}

.qr-card .qr-account:hover {
    color: var(--accent-gold);
}

/* Footer */
.footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: 60px 0 30px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
    flex-wrap: wrap;
    gap: 24px;
}

.footer-brand p {
    color: var(--text-secondary);
    margin-top: 10px;
    font-size: 0.95rem;
}

.footer-links {
    display: flex;
    gap: 28px;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--text-secondary);
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--accent-gold-light);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-risk {
    margin-top: 10px;
    font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 992px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }

    .steps-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .specs-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .qr-codes {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(10, 11, 14, 0.98);
        flex-direction: column;
        align-items: center;
        padding: 30px 0;
        gap: 24px;
        border-bottom: 1px solid var(--border-color);
        transform: translateY(-150%);
        opacity: 0;
        transition: transform 0.3s ease, opacity 0.3s ease;
    }

    [data-theme="light"] .nav-menu {
        background: rgba(255, 255, 255, 0.98);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .features-grid,
    .pricing-grid,
    .qr-codes,
    .steps-grid,
    .specs-grid {
        grid-template-columns: 1fr;
    }

    .pricing-card.featured {
        transform: none;
    }

    .pricing-card.featured:hover {
        transform: translateY(-5px);
    }

    .slider-prev { left: 10px; }
    .slider-next { right: 10px; }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .footer-links {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
    }

    .hero-stats {
        grid-template-columns: 1fr 1fr;
        gap: 16px;
        padding: 20px;
    }

    .stat-value {
        font-size: 1.5rem;
    }
}

/* How It Works */
.how-it-works {
    background: var(--bg-secondary);
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    position: relative;
}

.step-card {
    text-align: center;
    padding: 32px 24px;
    position: relative;
}

.step-number {
    width: 56px;
    height: 56px;
    margin: 0 auto 20px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-gold), var(--accent-gold-light));
    color: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
    font-size: 1.5rem;
    box-shadow: 0 8px 24px rgba(212, 168, 83, 0.3);
}

.step-card h3 {
    font-size: 1.1rem;
    margin-bottom: 12px;
    font-weight: 700;
}

.step-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* Tech Specs */
.tech-specs {
    background: var(--bg-primary);
}

.quick-start {
    background: var(--bg-secondary);
}

.quick-start .steps-grid {
    grid-template-columns: repeat(5, 1fr);
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.spec-item {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 20px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.spec-item:hover {
    border-color: var(--border-color-light);
    background: var(--bg-card-hover);
}

.spec-label {
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 4px;
}

.spec-value {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.95rem;
}

.spec-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent-green);
    flex-shrink: 0;
    margin-top: 6px;
}

/* ===== Payment Modal ===== */
.pay-overlay{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,.75);z-index:99999;align-items:center;justify-content:center;padding:16px;box-sizing:border-box}
.pay-overlay.show{display:flex}
.pay-modal{background:var(--bg-card,#1a1b20);border:1px solid var(--border-color,#2a2d36);border-radius:16px;max-width:440px;width:100%;max-height:90vh;overflow-y:auto;animation:payIn .25s ease}
@keyframes payIn{0%{transform:scale(.9);opacity:0}100%{transform:scale(1);opacity:1}}
.pay-head{background:linear-gradient(135deg,var(--accent-gold,#d4a853),var(--accent-green,#00c853));padding:20px 24px;text-align:center;color:#fff;border-radius:16px 16px 0 0}
.pay-head h3{font-size:18px;margin:0 0 4px}
.pay-head .plan-name{font-size:13px;opacity:.85}
.pay-summary{padding:14px 24px;border-bottom:1px solid var(--border-color,#2a2d36);display:flex;justify-content:space-between;align-items:center;font-size:14px;color:var(--text-secondary,#a0a3b1)}
.pay-summary .total{font-size:22px;font-weight:700;color:var(--accent-gold-light,#e8c87a)}
.pay-tabs-nav{display:flex;border-bottom:1px solid var(--border-color,#2a2d36)}
.pay-tab-btn{flex:1;text-align:center;padding:11px 4px;cursor:pointer;font-size:12px;font-weight:600;color:var(--text-secondary,#a0a3b1);background:transparent;border:none;transition:all .2s;position:relative;line-height:1.3}
.pay-tab-btn .tab-ico{font-size:18px;display:block;margin-bottom:2px}
.pay-tab-btn.active{color:var(--text-primary,#fff)}
.pay-tab-btn.active::after{content:"";position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:60%;height:3px;border-radius:3px 3px 0 0}
.pay-tab-btn[data-m="alipay"].active::after{background:#1677FF}
.pay-tab-btn[data-m="wechat"].active::after{background:#07C160}
.pay-tab-btn[data-m="trc20"].active::after{background:#EF4444}
.pay-tab-btn[data-m="bep20"].active::after{background:#F3BA2F}
.pay-tab-panel{display:none;padding:20px 24px}
.pay-tab-panel.active{display:block}
.pay-qr{width:200px;height:200px;margin:0 auto 10px;border-radius:12px;overflow:hidden;box-shadow:0 2px 12px rgba(0,0,0,.1)}
.pay-qr img{width:100%;height:100%;object-fit:cover;display:block}
.pay-qr-gen{width:180px;height:180px;margin:0 auto 10px;background:#fff;border-radius:12px;padding:10px;display:flex;align-items:center;justify-content:center}
.pay-info{font-size:13px;color:var(--text-secondary,#a0a3b1);text-align:center;line-height:1.6}
.pay-info strong{color:var(--text-primary,#fff)}
.pay-info .amount{display:inline-block;font-size:18px;font-weight:700;color:var(--accent-gold-light,#e8c87a);margin:4px 0}
.pay-addr{position:relative;background:var(--bg-primary,#14151a);border:1px solid var(--border-color,#2a2d36);border-radius:8px;padding:10px 40px 10px 12px;word-break:break-all;font-family:monospace;font-size:12px;color:var(--accent-gold-light,#e8c87a);line-height:1.5;cursor:pointer;margin-top:8px;text-align:left}
.pay-addr .copy-btn{position:absolute;right:6px;top:50%;transform:translateY(-50%);background:var(--bg-card,#1a1b20);border:1px solid var(--border-color,#2a2d36);border-radius:6px;padding:4px 8px;font-size:11px;cursor:pointer;color:var(--text-secondary,#a0a3b1)}
.pay-addr .copy-btn.copied{color:#059669;border-color:#059669}
.pay-act{padding:14px 24px 20px;display:flex;gap:10px}
.pay-act .btn-back{flex:1;padding:10px;border-radius:8px;border:1px solid var(--border-color,#2a2d36);background:transparent;color:var(--text-primary,#fff);font-size:14px;cursor:pointer;text-align:center}
.pay-act .btn-done{flex:2;padding:10px;border-radius:8px;border:none;background:linear-gradient(135deg,var(--accent-gold,#d4a853),var(--accent-gold-light,#e8c87a));color:#1a1a1a;font-size:14px;font-weight:700;cursor:pointer}
.pay-toast{position:fixed;top:20px;left:50%;transform:translateX(-50%) translateY(-20px);background:#059669;color:#fff;padding:10px 20px;border-radius:8px;font-size:14px;z-index:999999;opacity:0;transition:all .3s;pointer-events:none}
.pay-toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.pay-toast.err{background:#EF4444}

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

.feature-card,
.section-header,
.pricing-card,
.faq-item,
.contact-card,
.qr-card,
.step-card,
.spec-item {
    animation: fadeInUp 0.6s ease forwards;
}