:root {
    --primary: #7C3AED;
    --primary-dark: #5B21B6;
    --primary-light: #A78BFA;
    --accent: #3B82F6;
    --accent-light: #60A5FA;
    --dark: #0F172A;
    --darker: #020617;
    --light: #F8FAFC;
    --text-primary: #F1F5F9;
    --text-secondary: #94A3B8;
    --success: #10B981;
    --warning: #F59E0B;
    --card-bg: rgba(30, 41, 59, 0.7);
    --card-border: rgba(148, 163, 184, 0.1);
}

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

html {
    scroll-behavior: smooth;
}

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

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

ul {
    list-style: none;
}

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--card-border);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 1.25rem;
}

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

.logo-text {
    background: linear-gradient(135deg, var(--primary-light), var(--accent-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.3s;
}

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

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
}

.hero {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    padding: 6rem 2rem 2rem;
    max-width: 1400px;
    margin: 0 auto;
    gap: 4rem;
}

.hero-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(ellipse at 20% 20%, rgba(124, 58, 237, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(59, 130, 246, 0.15) 0%, transparent 50%);
    z-index: -1;
}

.hero-content {
    animation: fadeInUp 0.8s ease-out;
}

.hero-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(124, 58, 237, 0.2);
    border: 1px solid rgba(124, 58, 237, 0.3);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--primary-light);
    margin-bottom: 1.5rem;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--light) 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 1.75rem;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: white;
    box-shadow: 0 4px 20px rgba(124, 58, 237, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(124, 58, 237, 0.5);
}

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

.btn-secondary:hover {
    background: rgba(51, 65, 85, 0.8);
    border-color: var(--primary);
}

.hero-stats {
    display: flex;
    gap: 3rem;
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--light);
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeInUp 0.8s ease-out 0.2s backwards;
}

.phone-mockup {
    perspective: 1000px;
}

.phone-frame {
    width: 280px;
    height: 560px;
    background: var(--dark);
    border-radius: 40px;
    padding: 12px;
    box-shadow:
        0 0 0 2px rgba(255,255,255,0.1),
        0 25px 50px rgba(0,0,0,0.5),
        inset 0 1px 0 rgba(255,255,255,0.1);
    transform: rotateY(-5deg) rotateX(5deg);
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, var(--darker) 0%, var(--dark) 100%);
    border-radius: 32px;
    overflow: hidden;
}

.app-interface {
    padding: 1rem;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.app-title {
    font-weight: 600;
    font-size: 0.9rem;
}

.app-status {
    font-size: 0.7rem;
    color: var(--success);
}

.lap-display {
    text-align: center;
    padding: 1.5rem 0;
    background: rgba(124, 58, 237, 0.1);
    border-radius: 16px;
    margin-bottom: 1rem;
}

.current-lap {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-light);
    font-variant-numeric: tabular-nums;
}

.best-lap {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

.track-map {
    height: 80px;
    margin-bottom: 1rem;
}

.track-svg {
    width: 100%;
    height: 100%;
}

.lap-times {
    flex: 1;
    overflow-y: auto;
}

.lap-time {
    padding: 0.5rem;
    font-size: 0.8rem;
    font-variant-numeric: tabular-nums;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--card-border);
}

.lap-time.completed {
    color: var(--text-primary);
}

.lap-time .best {
    background: var(--success);
    color: white;
    padding: 0.1rem 0.4rem;
    border-radius: 4px;
    font-size: 0.65rem;
    margin-left: 0.5rem;
}

.features {
    padding: 6rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(59, 130, 246, 0.2);
    border: 1px solid rgba(59, 130, 246, 0.3);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--accent-light);
    margin-bottom: 1rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.feature-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 2rem;
    transition: all 0.3s;
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: var(--primary);
    box-shadow: 0 12px 40px rgba(124, 58, 237, 0.15);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

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

.hardware {
    padding: 6rem 2rem;
    background: linear-gradient(180deg, transparent 0%, rgba(124, 58, 237, 0.05) 50%, transparent 100%);
}

.hardware-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hardware-text .section-title {
    text-align: left;
}

.hardware-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.hardware-specs {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.hardware-specs li {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.spec-icon {
    font-size: 1.5rem;
}

.hardware-specs strong {
    display: block;
    margin-bottom: 0.25rem;
}

.hardware-specs p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.hardware-note {
    margin-top: 2rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-style: italic;
}

.hardware-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.device-showcase {
    position: relative;
}

.device {
    width: 200px;
    z-index: 2;
}

.device-svg {
    width: 100%;
    height: auto;
}

.device-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 300px;
    height: 200px;
    background: radial-gradient(ellipse, rgba(124, 58, 237, 0.3) 0%, transparent 70%);
    filter: blur(40px);
    animation: pulse 3s ease-in-out infinite;
}

.download {
    padding: 6rem 2rem;
    text-align: center;
}

.download-content {
    max-width: 600px;
    margin: 0 auto;
}

.download h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.download p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    background: var(--dark);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    transition: all 0.3s;
}

.download-btn svg {
    width: 24px;
    height: 24px;
}

.download-btn:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
}

.coming-soon {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.footer {
    background: var(--dark);
    border-top: 1px solid var(--card-border);
    padding: 4rem 2rem 2rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-brand {
    margin-bottom: 2rem;
}

.footer-brand p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-bottom: 3rem;
}

.footer-column h4 {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--light);
}

.footer-column a {
    display: block;
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    transition: color 0.3s;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--card-border);
}

.footer-bottom p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.beian-link {
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

.beian-link:hover {
    color: var(--primary-light);
}

.legal-page {
    padding-top: 80px;
    min-height: 100vh;
}

.legal-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 4rem 2rem;
}

.legal-header {
    margin-bottom: 3rem;
    text-align: center;
}

.legal-header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

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

.legal-content {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 3rem;
}

.legal-section {
    margin-bottom: 2.5rem;
}

.legal-section:last-child {
    margin-bottom: 0;
}

.legal-section h2 {
    font-size: 1.35rem;
    margin-bottom: 1rem;
    color: var(--primary-light);
}

.legal-section h3 {
    font-size: 1.1rem;
    margin: 1.5rem 0 0.75rem;
    color: var(--light);
}

.legal-section p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.8;
}

.legal-section ul {
    margin: 1rem 0;
    padding-left: 1.5rem;
}

.legal-section li {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    line-height: 1.7;
    list-style: disc;
}

/* Support Page Styles */
.hero-short {
    min-height: 50vh;
    padding-bottom: 4rem;
}

.hero-center {
    grid-column: 1 / -1;
    text-align: center;
    margin: 0 auto;
    max-width: 800px;
}

.support-section {
    width: min(100%, 1200px);
    padding: 4rem 2rem;
    margin: 0 auto;
}

.contact-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 3rem;
    text-align: center;
    width: min(100%, 600px);
    max-width: 600px;
    margin: 0 auto;
    transition: transform 0.3s, box-shadow 0.3s;
}

.contact-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.contact-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.contact-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--light);
}

.contact-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.contact-email {
    display: inline-block;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-light);
    padding: 0.75rem 2rem;
    background: rgba(124, 58, 237, 0.1);
    border-radius: 50px;
    transition: all 0.3s;
}

.contact-email:hover {
    background: rgba(124, 58, 237, 0.2);
    color: var(--light);
}

.faq-container {
    width: min(100%, 800px);
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

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

.faq-question {
    width: 100%;
    text-align: left;
    padding: 1.5rem;
    background: none;
    border: none;
    color: var(--light);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.3s;
}

.faq-question:hover {
    background: rgba(255, 255, 255, 0.05);
}

.faq-icon {
    font-size: 1.5rem;
    color: var(--primary-light);
    transition: transform 0.3s;
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
}

.faq-answer p {
    padding: 0 1.5rem 1.5rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    left: 20px;
    height: 100%;
    width: 2px;
    background: var(--card-border);
}

.timeline-item {
    position: relative;
    padding-left: 60px;
    margin-bottom: 3rem;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-dot {
    position: absolute;
    top: 5px;
    left: 15px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--primary);
    border: 2px solid var(--darker);
    box-shadow: 0 0 0 4px rgba(124, 58, 237, 0.2);
}

.timeline-date {
    font-size: 0.9rem;
    color: var(--primary-light);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.timeline-content {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 1.5rem;
}

.timeline-content h3 {
    font-size: 1.25rem;
    color: var(--light);
    margin-bottom: 1rem;
}

.timeline-content ul {
    padding-left: 1.5rem;
}

.timeline-content li {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    list-style: disc;
}

.legal-section a {
    color: var(--primary-light);
    transition: color 0.3s;
}

.legal-section a:hover {
    color: var(--accent-light);
}

.warning-box {
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.3);
    border-radius: 12px;
    padding: 1.5rem;
    margin: 1.5rem 0;
}

.warning-box h3 {
    color: var(--warning);
    margin-top: 0;
}

.warning-box ul {
    padding-left: 1.25rem;
}

.warning-box li {
    list-style: disc;
}

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

@keyframes pulse {
    0%, 100% {
        opacity: 0.3;
        transform: translate(-50%, -50%) scale(1);
    }
    50% {
        opacity: 0.5;
        transform: translate(-50%, -50%) scale(1.1);
    }
}

@media (max-width: 1024px) {
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        padding-top: 8rem;
    }

    .hero-visual {
        order: -1;
    }

    .phone-frame {
        width: 240px;
        height: 480px;
    }

    .hero-cta {
        justify-content: center;
    }

    .hero-stats {
        justify-content: center;
    }

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

    .hardware-content {
        grid-template-columns: 1fr;
    }

    .hardware-visual {
        order: -1;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .mobile-menu-btn {
        display: block;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-stats {
        flex-wrap: wrap;
        gap: 1.5rem;
    }

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

    .footer-links {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .legal-content {
        padding: 1.5rem;
    }

    .legal-header h1 {
        font-size: 2rem;
    }
}