:root {
    --primary: #0066FF;
    --primary-light: #00D4FF;
    --primary-dark: #0052CC;
    --secondary: #64748b;
    --accent: #00D4FF;
    --background: #0a0e17;
    --background-alt: #111827;
    --surface: #1a2332;
    --surface-light: #243044;
    --text: #f1f5f9;
    --text-light: #94a3b8;
    --text-muted: #64748b;
    --border: #2d3748;
    --glow: rgba(0, 212, 255, 0.3);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 10px 10px -5px rgba(0, 0, 0, 0.3);
    --radius: 12px;
    --radius-lg: 20px;
}

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

html {
    scroll-behavior: smooth;
}

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

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

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 14, 23, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 212, 255, 0.1);
}

.nav {
    padding: 16px 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text);
}

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

.logo-text {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.lang-switcher {
    display: flex;
    gap: 4px;
    background: var(--surface);
    padding: 4px;
    border-radius: 8px;
    border: 1px solid var(--border);
}

.lang-btn {
    padding: 6px 12px;
    border: none;
    background: transparent;
    color: var(--text-muted);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    border-radius: 6px;
    transition: all 0.2s;
}

.lang-btn:hover {
    color: var(--text);
}

.lang-btn.active {
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
    color: white;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-light);
    font-weight: 500;
    font-size: 15px;
    transition: all 0.2s;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-light), var(--primary));
    transition: width 0.3s;
}

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

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

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

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: all 0.3s;
}

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

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
    background: radial-gradient(ellipse at 30% 20%, rgba(0, 212, 255, 0.15) 0%, transparent 50%),
                radial-gradient(ellipse at 70% 80%, rgba(0, 102, 255, 0.1) 0%, transparent 50%),
                var(--background);
}

.grid-pattern {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.glow-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    animation: float 6s ease-in-out infinite;
}

.orb-1 {
    width: 400px;
    height: 400px;
    background: rgba(0, 212, 255, 0.2);
    top: -100px;
    right: 10%;
}

.orb-2 {
    width: 300px;
    height: 300px;
    background: rgba(0, 102, 255, 0.15);
    bottom: -50px;
    left: 10%;
    animation-delay: -3s;
}

@keyframes float {
    0%, 100% { transform: translateY(0) scale(1); }
    50% { transform: translateY(-20px) scale(1.05); }
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

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

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

.brand-name {
    display: block;
    font-size: 56px;
    font-weight: 800;
    letter-spacing: -2px;
    line-height: 1.1;
    margin-bottom: 12px;
    background: linear-gradient(135deg, #ffffff 0%, var(--primary-light) 50%, var(--primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.brand-tagline {
    display: block;
    font-size: 24px;
    font-weight: 500;
    color: var(--text-light);
    letter-spacing: 0.5px;
}

.hero-desc {
    font-size: 18px;
    color: var(--text-muted);
    margin-bottom: 28px;
    max-width: 500px;
    line-height: 1.7;
}

.hero-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 32px;
}

.badge {
    padding: 8px 16px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
    color: var(--primary-light);
}

.hero-cta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 15px;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.btn svg {
    width: 20px;
    height: 20px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
    color: white;
    box-shadow: 0 4px 20px rgba(0, 212, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 212, 255, 0.4);
}

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

.btn-secondary:hover {
    border-color: var(--primary-light);
    color: var(--primary-light);
}

.btn-ios {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    color: white;
    border: 1px solid var(--border);
}

.btn-ios:hover {
    border-color: #a2a2a2;
    transform: translateY(-2px);
}

.btn-lg {
    padding: 16px 32px;
    font-size: 16px;
}

.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeIn 1s ease-out 0.3s both;
}

.phone-mockup {
    position: relative;
}

.phone-frame {
    width: 280px;
    height: 560px;
    background: linear-gradient(145deg, #1a2332 0%, #0d1117 100%);
    border-radius: 40px;
    padding: 10px;
    box-shadow: 
        0 0 0 1px rgba(0, 212, 255, 0.2),
        0 25px 50px -12px rgba(0, 0, 0, 0.5),
        0 0 100px rgba(0, 212, 255, 0.1);
    position: relative;
}

.phone-frame::before {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: 40px;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.3), transparent, rgba(0, 102, 255, 0.3));
    z-index: -1;
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask-composite: exclude;
    padding: 1px;
}

.phone-notch {
    position: absolute;
    top: 12px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 28px;
    background: #0d1117;
    border-radius: 20px;
    z-index: 10;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, #0f1419 0%, #1a2332 100%);
    border-radius: 34px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.app-header {
    padding: 32px 16px 16px;
    text-align: center;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.15) 0%, rgba(0, 102, 255, 0.1) 100%);
    border-bottom: 1px solid rgba(0, 212, 255, 0.1);
}

.app-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--primary-light);
}

.app-content {
    flex: 1;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.app-card {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 18px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 14px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all 0.3s;
}

.app-card svg {
    width: 28px;
    height: 28px;
    color: var(--primary-light);
}

.app-card span {
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
}

.app-card.active {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1) 0%, rgba(0, 102, 255, 0.05) 100%);
    border-color: rgba(0, 212, 255, 0.3);
}

.app-nav {
    display: flex;
    justify-content: center;
    gap: 8px;
    padding: 20px;
}

.app-nav span {
    width: 32px;
    height: 4px;
    background: var(--border);
    border-radius: 2px;
}

.app-nav span:first-child {
    background: linear-gradient(90deg, var(--primary-light), var(--primary));
}

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

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

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 13px;
    animation: bounce 2s ease-in-out infinite;
}

.scroll-indicator svg {
    width: 20px;
    height: 20px;
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(8px); }
}

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

.section-title {
    font-size: 40px;
    font-weight: 700;
    letter-spacing: -1px;
    margin-bottom: 12px;
    background: linear-gradient(135deg, #ffffff 0%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-desc {
    font-size: 18px;
    color: var(--text-muted);
}

.features {
    padding: 100px 0;
    background: var(--background-alt);
    position: relative;
}

.features::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.3), transparent);
}

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

.feature-card {
    background: linear-gradient(135deg, rgba(26, 35, 50, 0.8) 0%, rgba(17, 24, 39, 0.8) 100%);
    border-radius: var(--radius-lg);
    padding: 32px;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-light), var(--primary));
    opacity: 0;
    transition: opacity 0.3s;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    border-color: rgba(0, 212, 255, 0.3);
}

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

.feature-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.15) 0%, rgba(0, 102, 255, 0.1) 100%);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    border: 1px solid rgba(0, 212, 255, 0.2);
}

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

.feature-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
    color: #ffffff;
}

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

.highlights {
    padding: 100px 0;
    position: relative;
}

.highlights-list {
    display: grid;
    gap: 24px;
    max-width: 800px;
    margin: 0 auto;
}

.highlight-item {
    display: flex;
    gap: 24px;
    padding: 28px;
    background: linear-gradient(135deg, rgba(26, 35, 50, 0.6) 0%, rgba(17, 24, 39, 0.6) 100%);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    transition: all 0.3s ease;
}

.highlight-item:hover {
    border-color: rgba(0, 212, 255, 0.3);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    transform: translateX(8px);
}

.highlight-number {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    font-weight: 700;
    color: white;
}

.highlight-content h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    color: #ffffff;
}

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

.tools {
    padding: 100px 0;
    background: var(--background-alt);
    position: relative;
}

.tools::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.3), transparent);
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.tool-card {
    background: linear-gradient(135deg, rgba(26, 35, 50, 0.8) 0%, rgba(17, 24, 39, 0.8) 100%);
    border-radius: var(--radius);
    padding: 24px;
    text-align: center;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
}

.tool-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.25);
    border-color: rgba(0, 212, 255, 0.3);
}

.tool-icon {
    width: 52px;
    height: 52px;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1) 0%, rgba(0, 102, 255, 0.05) 100%);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 14px;
    border: 1px solid rgba(0, 212, 255, 0.15);
}

.tool-icon svg {
    width: 26px;
    height: 26px;
    color: var(--primary-light);
}

.tool-title {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 8px;
    color: #ffffff;
}

.tool-desc {
    font-size: 12px;
    color: var(--text-muted);
    line-height: 1.5;
}

.tools-more {
    text-align: center;
    margin-top: 32px;
    font-size: 14px;
    color: var(--text-muted);
    font-style: italic;
}

.download {
    padding: 100px 0;
    background: linear-gradient(180deg, var(--background-alt) 0%, var(--background) 100%);
    position: relative;
}

.download::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.3), transparent);
}

.download-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.download-title {
    font-size: 40px;
    font-weight: 700;
    letter-spacing: -1px;
    margin-bottom: 12px;
    background: linear-gradient(135deg, #ffffff 0%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.download-desc {
    font-size: 18px;
    color: var(--text-muted);
    margin-bottom: 28px;
}

.download-features {
    list-style: none;
    margin-bottom: 32px;
}

.download-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    font-size: 15px;
    color: var(--text-light);
}

.download-features svg {
    width: 20px;
    height: 20px;
    color: var(--primary-light);
}

.download-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.download-qr {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.qr-code {
    width: 180px;
    height: 180px;
    background: white;
    border-radius: var(--radius);
    padding: 16px;
    box-shadow: 0 20px 40px rgba(0, 212, 255, 0.2);
    margin-bottom: 16px;
}

.qr-placeholder {
    width: 100%;
    height: 100%;
}

.qr-hint {
    font-size: 14px;
    color: var(--text-muted);
}

.wechat-tip {
    margin-top: 16px;
    font-size: 13px;
    color: var(--primary-light);
    text-align: center;
    padding: 12px 16px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 8px;
}

.screenshots {
    padding: 100px 0;
}

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

.screenshot {
    aspect-ratio: 9/19;
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--surface);
    border: 1px solid var(--border);
    transition: all 0.3s;
}

.screenshot:hover {
    border-color: var(--primary-light);
    transform: scale(1.02);
}

.screenshot-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 14px;
    background: linear-gradient(135deg, var(--surface) 0%, var(--surface-light) 100%);
}

.footer {
    padding: 60px 0 30px;
    background: var(--background-alt);
    border-top: 1px solid var(--border);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    margin-bottom: 40px;
}

.footer-brand .logo-text {
    font-size: 20px;
    font-weight: 700;
    display: block;
    margin-bottom: 8px;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-desc {
    font-size: 14px;
    color: var(--text-muted);
}

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

.footer-col h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text);
}

.footer-col a {
    display: block;
    text-decoration: none;
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 10px;
    transition: color 0.2s;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--border);
}

.footer-bottom p {
    font-size: 13px;
    color: var(--text-muted);
}

@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .tools-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .screenshots-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--surface);
        flex-direction: column;
        padding: 20px;
        gap: 16px;
        border-bottom: 1px solid var(--border);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .lang-switcher {
        display: none;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content {
        order: 2;
    }
    
    .hero-visual {
        order: 1;
    }
    
    .brand-name {
        font-size: 40px;
    }
    
    .brand-tagline {
        font-size: 20px;
    }
    
    .hero-desc {
        font-size: 16px;
    }
    
    .hero-badges {
        justify-content: center;
    }

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

    .phone-mockup,
    .scroll-indicator {
        display: none;
    }

    .phone-frame {
        width: 220px;
        height: 440px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .tools-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .download-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .download-features {
        text-align: left;
    }
    
    .download-buttons {
        justify-content: center;
    }
    
    .screenshots-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 30px;
    }
    
    .footer-links {
        gap: 40px;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .download-title {
        font-size: 32px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .hero {
        padding: 20px 0;
        min-height: 100vh;
        display: flex;
        align-items: center;
    }
    
    .hero-content {
        padding-top: 0;
    }

    .features, .highlights, .tools, .download, .screenshots {
        padding: 60px 0;
    }
    
    .phone-mockup,
    .scroll-indicator {
        display: none;
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
    }
    
    .screenshots-grid {
        grid-template-columns: 1fr;
    }
}