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

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #10b981;
    --accent: #f59e0b;
    --dark: #1a1a1a;
    --light: #ffffff;
    --gray-50: #fafafa;
    --gray-100: #f5f5f5;
    --gray-200: #e5e5e5;
    --gray-300: #d4d4d4;
    --gray-400: #a3a3a3;
    --gray-500: #737373;
    --gray-600: #525252;
    --gray-700: #404040;
    --gray-800: #262626;
    --gray-900: #171717;
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    --gradient-dark: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --radius-sm: 6px;
    --radius: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: var(--light);
    color: var(--dark);
    line-height: 1.6;
    overflow-x: hidden;
}

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

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--gray-200);
    transition: all 0.3s ease;
}

.navbar.scrolled {
    box-shadow: var(--shadow);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

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

.nav-logo {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    object-fit: cover;
}

.nav-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--dark);
    letter-spacing: -0.5px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link {
    position: relative;
    padding: 10px 20px;
    font-size: 15px;
    font-weight: 500;
    color: var(--gray-600);
    text-decoration: none;
    border-radius: var(--radius);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

.nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.1), transparent);
    transition: left 0.6s ease;
    z-index: -1;
}

.nav-link:hover::before {
    left: 100%;
}

.nav-link:hover {
    color: var(--primary);
    background: var(--gray-100);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.15);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    transition: all 0.3s ease;
}

.nav-brand:hover {
    transform: scale(1.05);
}

.nav-logo {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    object-fit: cover;
    transition: all 0.3s ease;
}

.nav-brand:hover .nav-logo {
    transform: rotate(5deg) scale(1.1);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

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

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--dark);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 24px 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
}

.hero-gradient {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at top, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
                radial-gradient(ellipse at bottom right, rgba(16, 185, 129, 0.15) 0%, transparent 50%),
                radial-gradient(ellipse at bottom left, rgba(245, 158, 11, 0.1) 0%, transparent 50%);
}

.hero-grid {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(99, 102, 241, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(99, 102, 241, 0.05) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
    0% {
        background-position: 0 0;
    }
    100% {
        background-position: 50px 50px;
    }
}

.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--primary);
    border-radius: 50%;
    opacity: 0.3;
    animation: float 15s infinite ease-in-out;
    box-shadow: 0 0 10px var(--primary);
}

.hero-icon {
    position: relative;
    z-index: 1;
}

.hero-icon-glow {
    position: absolute;
    top: -10px;
    left: -10px;
    right: -10px;
    bottom: -10px;
    border-radius: 28px;
    background: var(--gradient-primary);
    filter: blur(20px);
    opacity: 0.3;
    animation: glowPulse 2s infinite ease-in-out;
    z-index: -1;
}

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

.title-glow {
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    height: 20px;
    background: var(--gradient-primary);
    filter: blur(30px);
    opacity: 0.3;
    z-index: -1;
}

.btn {
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn-glow {
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.6s ease;
    z-index: -1;
}

.btn:hover .btn-glow {
    left: 100%;
}

.stat-item {
    position: relative;
    text-align: center;
    padding: 20px;
    border-radius: var(--radius-lg);
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.2);
    border-color: var(--primary);
}

.stat-icon {
    width: 40px;
    height: 40px;
    margin: 0 auto 12px;
    border-radius: 10px;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--light);
    animation: iconPulse 2s infinite ease-in-out;
}

@keyframes iconPulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
}

.hero-scroll {
    position: relative;
}

.scroll-wave {
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 20px;
    border: 2px solid var(--gray-400);
    border-top: none;
    border-radius: 0 0 20px 20px;
    animation: wave 2s infinite ease-in-out;
}

.scroll-wave::before {
    content: '';
    position: absolute;
    top: -6px;
    left: 10px;
    width: 8px;
    height: 8px;
    background: var(--gray-400);
    border-radius: 50%;
    animation: drop 2s infinite ease-in-out;
}

@keyframes wave {
    0%, 100% {
        transform: translateX(-50%) scaleY(1);
    }
    50% {
        transform: translateX(-50%) scaleY(1.2);
    }
}

@keyframes drop {
    0%, 100% {
        transform: translateY(0);
        opacity: 0;
    }
    50% {
        transform: translateY(10px);
        opacity: 1;
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) translateX(0);
    }
    25% {
        transform: translateY(-20px) translateX(10px);
    }
    50% {
        transform: translateY(-10px) translateX(-10px);
    }
    75% {
        transform: translateY(-30px) translateX(5px);
    }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
}

.hero-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto 32px;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    animation: bounce 2s infinite ease-in-out;
}

.hero-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

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

.title-main {
    display: block;
    font-size: 64px;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -2px;
    line-height: 1.1;
}

.title-sub {
    display: block;
    font-size: 28px;
    font-weight: 600;
    color: var(--gray-600);
    margin-top: 8px;
}

.hero-desc {
    font-size: 20px;
    color: var(--gray-500);
    max-width: 600px;
    margin: 0 auto 40px;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 60px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius);
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--light);
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
}

.btn-secondary {
    background: var(--light);
    color: var(--dark);
    border: 2px solid var(--gray-200);
}

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

.btn-download {
    background: var(--dark);
    color: var(--light);
    width: 100%;
    justify-content: center;
    padding: 18px 32px;
    font-size: 16px;
}

.btn-download:hover {
    background: var(--gray-800);
    transform: translateY(-2px);
}

.btn-download-outline {
    background: transparent;
    color: var(--dark);
    border: 2px solid var(--gray-300);
}

.btn-download-outline:hover {
    border-color: var(--dark);
    background: var(--gray-100);
}

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

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 60px;
}

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

.stat-value {
    display: block;
    font-size: 36px;
    font-weight: 800;
    color: var(--dark);
    letter-spacing: -1px;
}

.stat-label {
    font-size: 14px;
    color: var(--gray-500);
    font-weight: 500;
}

.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    color: var(--gray-400);
    animation: scrollBounce 2s infinite ease-in-out;
}

@keyframes scrollBounce {
    0%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    50% {
        transform: translateX(-50%) translateY(10px);
    }
}

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

.section-title {
    font-size: 42px;
    font-weight: 800;
    color: var(--dark);
    letter-spacing: -1px;
    margin-bottom: 16px;
}

.section-desc {
    font-size: 18px;
    color: var(--gray-500);
    max-width: 600px;
    margin: 0 auto;
}

.features {
    padding: 120px 0;
    background: var(--gray-50);
}

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

.feature-card {
    position: relative;
    background: var(--light);
    border-radius: var(--radius-lg);
    padding: 32px;
    text-align: center;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--gray-200);
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.1), transparent);
    transition: left 0.6s ease;
    z-index: 0;
}

.feature-card:hover::before {
    left: 100%;
}

.feature-card:hover {
    transform: translateY(-12px) scale(1.02);
    box-shadow: 0 20px 40px rgba(99, 102, 241, 0.2);
    border-color: var(--primary);
}

.feature-icon {
    position: relative;
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    border-radius: var(--radius);
    background: var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1;
}

.feature-icon::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: var(--radius);
    background: var(--gradient-primary);
    transform: scale(0);
    transition: transform 0.4s ease;
    z-index: -1;
}

.feature-card:hover .feature-icon {
    color: var(--light);
    transform: scale(1.1) rotate(5deg);
}

.feature-card:hover .feature-icon::after {
    transform: scale(1);
}

.feature-title {
    position: relative;
    font-size: 18px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 12px;
    transition: all 0.3s ease;
    z-index: 1;
}

.feature-card:hover .feature-title {
    color: var(--primary);
    transform: translateY(-2px);
}

.feature-desc {
    position: relative;
    font-size: 14px;
    color: var(--gray-500);
    line-height: 1.6;
    transition: all 0.3s ease;
    z-index: 1;
}

.feature-card:hover .feature-desc {
    color: var(--gray-700);
}

.architecture {
    padding: 120px 0;
    background: var(--light);
}

.arch-diagram {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

.arch-layer {
    width: 100%;
    max-width: 900px;
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    padding: 32px;
    border: 1px solid var(--gray-200);
}

.layer-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 20px;
    text-align: center;
}

.layer-items {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
}

.arch-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 24px;
    background: var(--light);
    border-radius: var(--radius);
    border: 1px solid var(--gray-200);
    font-size: 14px;
    font-weight: 600;
    color: var(--dark);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.arch-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.1), transparent);
    transition: left 0.6s ease;
    z-index: 0;
}

.arch-item:hover::before {
    left: 100%;
}

.arch-item:hover {
    transform: translateY(-5px) scale(1.03);
    border-color: var(--primary);
    box-shadow: 0 10px 25px rgba(99, 102, 241, 0.2);
}

.arch-item-icon {
    position: relative;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    background: var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    transition: all 0.3s ease;
    z-index: 1;
}

.arch-item:hover .arch-item-icon {
    background: var(--gradient-primary);
    color: var(--light);
    transform: scale(1.1) rotate(5deg);
}

.arch-item-large {
    padding: 24px 40px;
    font-size: 16px;
}

.arch-item-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    background: var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
}

.arch-arrow {
    color: var(--gray-400);
    animation: arrowPulse 1.5s infinite ease-in-out;
}

@keyframes arrowPulse {
    0%, 100% {
        opacity: 0.5;
        transform: translateY(0);
    }
    50% {
        opacity: 1;
        transform: translateY(5px);
    }
}

.arch-layer-client {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    border-color: #bae6fd;
}

.arch-layer-protocol {
    background: linear-gradient(135deg, #fdf4ff 0%, #fae8ff 100%);
    border-color: #f5d0fe;
}

.arch-layer-service {
    background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 100%);
    border-color: #bbf7d0;
}

.arch-layer-core {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    border-color: transparent;
}

.arch-layer-core .layer-title {
    color: rgba(255, 255, 255, 0.8);
}

.arch-layer-core .arch-item {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.3);
    color: var(--light);
    backdrop-filter: blur(10px);
}

.arch-layer-core .arch-item-icon {
    background: rgba(255, 255, 255, 0.2);
    color: var(--light);
}

.highlights {
    padding: 120px 0;
    background: var(--gradient-dark);
}

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

.highlight-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    padding: 40px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.highlight-card:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-4px);
}

.highlight-number {
    font-size: 48px;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 20px;
    opacity: 0.5;
}

.highlight-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--light);
    margin-bottom: 16px;
}

.highlight-desc {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.7;
}

.download {
    padding: 120px 0;
    background: var(--gray-50);
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    margin-bottom: 60px;
}

.download-card {
    position: relative;
    background: var(--light);
    border-radius: var(--radius-xl);
    padding: 48px;
    text-align: center;
    border: 1px solid var(--gray-200);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

.download-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.1), transparent);
    transition: left 0.6s ease;
    z-index: 0;
}

.download-card:hover::before {
    left: 100%;
}

.download-card:hover {
    transform: translateY(-12px) scale(1.02);
    box-shadow: 0 20px 40px rgba(99, 102, 241, 0.2);
    border-color: var(--primary);
}

.download-icon {
    position: relative;
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    border-radius: var(--radius-lg);
    background: var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1;
}

.download-icon::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: var(--radius-lg);
    background: var(--gradient-primary);
    transform: scale(0);
    transition: transform 0.4s ease;
    z-index: -1;
}

.download-card:hover .download-icon {
    color: var(--light);
    transform: scale(1.1) rotate(5deg);
}

.download-card:hover .download-icon::after {
    transform: scale(1);
}

.download-title {
    position: relative;
    font-size: 24px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 12px;
    transition: all 0.3s ease;
    z-index: 1;
}

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

.download-desc {
    position: relative;
    font-size: 15px;
    color: var(--gray-500);
    margin-bottom: 24px;
    transition: all 0.3s ease;
    z-index: 1;
}

.download-card:hover .download-desc {
    color: var(--gray-700);
}

.download-info {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 16px;
}

.download-size,
.download-version {
    padding: 6px 14px;
    background: var(--gray-100);
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 600;
    color: var(--gray-600);
}

.download-activation {
    padding: 6px 14px;
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.2);
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 600;
    color: #f59e0b;
}

.download-price {
    padding: 6px 14px;
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 600;
    color: #3b82f6;
}

.download-ai-feature {
    padding: 6px 14px;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 600;
    color: #10b981;
}

.contact-info {
    margin-bottom: 24px;
    text-align: center;
}

.contact-item {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 12px 20px;
    background: var(--gray-50);
    border-radius: var(--radius);
    border: 1px solid var(--gray-200);
    transition: all 0.3s ease;
}

.contact-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.15);
    border-color: var(--primary);
}

.contact-icon {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    background: var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    flex-shrink: 0;
    transition: all 0.3s ease;
}

.contact-item:hover .contact-icon {
    background: var(--gradient-primary);
    color: var(--light);
    transform: scale(1.1) rotate(5deg);
}

.contact-text {
    font-size: 14px;
    font-weight: 500;
    color: var(--dark);
    transition: all 0.3s ease;
}

.contact-item:hover .contact-text {
    color: var(--primary);
}

.copy-tooltip {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--dark);
    color: var(--light);
    padding: 8px 16px;
    border-radius: var(--radius);
    font-size: 14px;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    margin-bottom: 8px;
    z-index: 100;
}

.copy-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border-width: 6px;
    border-style: solid;
    border-color: var(--dark) transparent transparent transparent;
}

.contact-item:hover .copy-tooltip {
    opacity: 1;
    visibility: visible;
    bottom: 110%;
}

.contact-item {
    position: relative;
    cursor: pointer;
    transition: all 0.3s ease;
}

.contact-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.download-requirements {
    background: var(--light);
    border-radius: var(--radius-lg);
    padding: 32px;
    border: 1px solid var(--gray-200);
}

.requirements-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 20px;
}

.requirements-list {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.requirements-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    color: var(--gray-600);
}

.requirements-list li::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--primary);
    border-radius: 50%;
}

.contact {
    padding: 120px 0;
    background: var(--light);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

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

.contact-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius);
    background: var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    flex-shrink: 0;
}

.contact-text {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.contact-label {
    font-size: 13px;
    color: var(--gray-500);
    font-weight: 500;
}

.contact-value {
    font-size: 16px;
    color: var(--dark);
    font-weight: 600;
}

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

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 16px 20px;
    font-size: 15px;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius);
    background: var(--light);
    color: var(--dark);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    font-family: inherit;
    position: relative;
    overflow: hidden;
}

.form-input::before,
.form-textarea::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.1), transparent);
    transition: left 0.6s ease;
    z-index: -1;
}

.form-input:focus::before,
.form-textarea:focus::before {
    left: 100%;
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
    transform: translateY(-2px);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 20px;
    transition: all 0.3s ease;
}

.contact-item:hover {
    transform: translateX(10px);
}

.contact-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius);
    background: var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    flex-shrink: 0;
    transition: all 0.3s ease;
}

.contact-item:hover .contact-icon {
    background: var(--gradient-primary);
    color: var(--light);
    transform: scale(1.1) rotate(5deg);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

.usage {
    padding: 120px 0;
    background: var(--light);
}

.usage-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
    margin-top: 60px;
}

.usage-card {
    position: relative;
    background: var(--light);
    border-radius: var(--radius-xl);
    padding: 40px;
    text-align: center;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--gray-200);
    overflow: hidden;
}

.usage-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.1), transparent);
    transition: left 0.6s ease;
    z-index: 0;
}

.usage-card:hover::before {
    left: 100%;
}

.usage-card:hover {
    transform: translateY(-12px) scale(1.02);
    box-shadow: 0 20px 40px rgba(99, 102, 241, 0.2);
    border-color: var(--primary);
}

.usage-icon {
    position: relative;
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    border-radius: var(--radius-lg);
    background: var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1;
}

.usage-icon::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: var(--radius-lg);
    background: var(--gradient-primary);
    transform: scale(0);
    transition: transform 0.4s ease;
    z-index: -1;
}

.usage-card:hover .usage-icon {
    color: var(--light);
    transform: scale(1.1) rotate(5deg);
}

.usage-card:hover .usage-icon::after {
    transform: scale(1);
}

.usage-title {
    position: relative;
    font-size: 20px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 16px;
    transition: all 0.3s ease;
    z-index: 1;
}

.usage-card:hover .usage-title {
    color: var(--primary);
    transform: translateY(-2px);
}

.usage-desc {
    position: relative;
    font-size: 15px;
    color: var(--gray-500);
    line-height: 1.6;
    transition: all 0.3s ease;
    z-index: 1;
}

.usage-card:hover .usage-desc {
    color: var(--gray-700);
}

.footer {
    background: var(--dark);
    padding: 80px 0 40px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    margin-bottom: 60px;
}

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

.footer-logo {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    object-fit: cover;
}

.footer-name {
    font-size: 24px;
    font-weight: 700;
    color: var(--light);
}

.footer-tagline {
    font-size: 14px;
    color: var(--gray-500);
}

.footer-links {
    display: flex;
    gap: 80px;
}

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

.footer-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--light);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.footer-link {
    font-size: 14px;
    color: var(--gray-500);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    padding-top: 40px;
    border-top: 1px solid var(--gray-800);
}

.copyright {
    text-align: center;
    font-size: 14px;
    color: var(--gray-500);
}

@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--light);
        flex-direction: column;
        padding: 24px;
        gap: 8px;
        border-bottom: 1px solid var(--gray-200);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
    }

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

    .nav-toggle {
        display: flex;
    }

    .title-main {
        font-size: 48px;
    }

    .title-sub {
        font-size: 22px;
    }

    .hero-desc {
        font-size: 16px;
    }

    .hero-actions {
        flex-direction: column;
    }

    .hero-stats {
        gap: 40px;
    }

    .stat-value {
        font-size: 28px;
    }

    .section-title {
        font-size: 32px;
    }

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

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

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

    .requirements-list {
        grid-template-columns: 1fr;
    }

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

    .footer-content {
        flex-direction: column;
        gap: 40px;
    }

    .footer-links {
        flex-wrap: wrap;
        gap: 40px;
    }
}

@media (max-width: 480px) {
    .features-grid {
        grid-template-columns: 1fr;
    }

    .layer-items {
        flex-direction: column;
    }

    .arch-item {
        width: 100%;
        justify-content: center;
    }
}