/* ===== CSS Variables ===== */
:root {
    /* 主色调 - 深邃蓝色系 */
    --primary-50: #eff6ff;
    --primary-100: #dbeafe;
    --primary-200: #bfdbfe;
    --primary-300: #93c5fd;
    --primary-400: #60a5fa;
    --primary-500: #3b82f6;
    --primary-600: #2563eb;
    --primary-700: #1d4ed8;
    --primary-800: #1e40af;
    --primary-900: #1e3a8a;
    --primary-950: #172554;

    /* 辅助色 - 科技感紫色 */
    --accent-400: #a78bfa;
    --accent-500: #8b5cf6;
    --accent-600: #7c3aed;

    /* 成功色 */
    --success-400: #4ade80;
    --success-500: #22c55e;

    /* 中性色 */
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    --gray-950: #020617;

    /* 背景色 */
    --bg-dark: #030712;
    --bg-dark-secondary: #0a1628;
    --bg-card: rgba(15, 23, 42, 0.6);
    --bg-card-hover: rgba(30, 41, 59, 0.8);

    /* 渐变 */
    --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #6366f1 50%, #8b5cf6 100%);
    --gradient-text: linear-gradient(135deg, #60a5fa 0%, #a78bfa 100%);
    --gradient-hero: radial-gradient(ellipse at top, #1e3a8a 0%, #030712 50%);
    --gradient-card: linear-gradient(180deg, rgba(59, 130, 246, 0.1) 0%, rgba(139, 92, 246, 0.05) 100%);

    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 40px rgba(59, 130, 246, 0.3);
    --shadow-glow-strong: 0 0 60px rgba(59, 130, 246, 0.5);

    /* 字体 */
    --font-sans: 'Outfit', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;

    /* 间距 */
    --section-padding: 120px;
    --container-padding: 24px;
    --container-max: 1280px;

    /* 圆角 */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-full: 9999px;

    /* 过渡 */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;
}

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

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

body {
    font-family: var(--font-sans);
    background: var(--bg-dark);
    color: var(--gray-100);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-fast);
}

ul {
    list-style: none;
}

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

/* ===== Utility Classes ===== */
.section-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

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

.gradient-text-light {
    background: linear-gradient(135deg, #93c5fd 0%, #c4b5fd 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 0;
    transition: all var(--transition-base);
}

.navbar.scrolled {
    padding: 12px 0;
    background: rgba(3, 7, 18, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(59, 130, 246, 0.1);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

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

.logo-icon {
    width: 40px;
    height: 40px;
    color: var(--primary-400);
    transition: transform var(--transition-base);
}

.logo:hover .logo-icon {
    transform: rotate(90deg);
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    gap: 40px;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--gray-300);
    position: relative;
    padding: 8px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-base);
}

.nav-link:hover,
.nav-link.active {
    color: var(--gray-50);
}

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

.nav-cta {
    padding: 12px 28px;
    font-size: 0.9rem;
    font-weight: 600;
    color: white;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.3);
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.4);
}

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

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--gray-300);
    transition: all var(--transition-base);
}

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

.hero-bg {
    position: absolute;
    inset: 0;
    background: var(--gradient-hero);
}

.grid-overlay {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(59, 130, 246, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(59, 130, 246, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.5;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: var(--primary-600);
    top: -200px;
    right: -100px;
    animation: float 20s ease-in-out infinite;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: var(--accent-500);
    bottom: -100px;
    left: -100px;
    animation: float 25s ease-in-out infinite reverse;
}

.orb-3 {
    width: 300px;
    height: 300px;
    background: var(--primary-400);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation: pulse 10s ease-in-out infinite;
}

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

@keyframes pulse {
    0%, 100% { opacity: 0.3; transform: translate(-50%, -50%) scale(1); }
    50% { opacity: 0.5; transform: translate(-50%, -50%) scale(1.2); }
}

.floating-shapes {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.shape {
    position: absolute;
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: var(--radius-md);
}

.shape-1 {
    width: 80px;
    height: 80px;
    top: 20%;
    left: 10%;
    transform: rotate(45deg);
    animation: floatShape 15s linear infinite;
}

.shape-2 {
    width: 60px;
    height: 60px;
    top: 60%;
    left: 5%;
    animation: floatShape 18s linear infinite reverse;
}

.shape-3 {
    width: 100px;
    height: 100px;
    top: 30%;
    right: 8%;
    transform: rotate(20deg);
    animation: floatShape 20s linear infinite;
}

.shape-4 {
    width: 50px;
    height: 50px;
    bottom: 20%;
    right: 15%;
    animation: floatShape 12s linear infinite reverse;
}

@keyframes floatShape {
    0%, 100% { transform: translateY(0) rotate(0deg); opacity: 0.3; }
    50% { transform: translateY(-30px) rotate(180deg); opacity: 0.6; }
}

.hero-container {
    position: relative;
    z-index: 1;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.hero-content {
    max-width: 600px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 8px 20px 8px 12px;
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--primary-300);
    margin-bottom: 32px;
    animation: fadeInUp 0.8s ease forwards;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--success-400);
    border-radius: 50%;
    animation: blink 2s ease-in-out infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

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

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 28px;
}

.title-line {
    display: block;
    animation: fadeInUp 0.8s ease forwards;
    opacity: 0;
}

.title-line:nth-child(1) { animation-delay: 0.1s; }
.title-line:nth-child(2) { animation-delay: 0.2s; }

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--gray-400);
    line-height: 1.8;
    margin-bottom: 40px;
    animation: fadeInUp 0.8s ease 0.3s forwards;
    opacity: 0;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 60px;
    animation: fadeInUp 0.8s ease 0.4s forwards;
    opacity: 0;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
}

.btn-primary {
    color: white;
    background: var(--gradient-primary);
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 40px rgba(59, 130, 246, 0.5);
}

.btn-primary .btn-arrow {
    width: 20px;
    height: 20px;
    transition: transform var(--transition-base);
}

.btn-primary:hover .btn-arrow {
    transform: translateX(4px);
}

.btn-secondary {
    color: var(--gray-200);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 32px;
    animation: fadeInUp 0.8s ease 0.5s forwards;
    opacity: 0;
}

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

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--gray-50);
    line-height: 1;
}

.stat-suffix {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-400);
}

.stat-label {
    display: block;
    font-size: 0.875rem;
    color: var(--gray-500);
    margin-top: 8px;
}

.stat-divider {
    width: 1px;
    height: 50px;
    background: linear-gradient(180deg, transparent, var(--gray-700), transparent);
}

/* Hero Visual */
.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 500px;
}

.visual-card {
    position: relative;
    width: 380px;
    height: 380px;
    background: var(--bg-card);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(20px);
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeIn 1s ease 0.5s forwards;
    opacity: 0;
}

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

.card-glow {
    position: absolute;
    inset: -2px;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    opacity: 0.3;
    filter: blur(20px);
    z-index: -1;
}

.card-content {
    position: relative;
}

.ai-brain svg {
    width: 200px;
    height: 200px;
    animation: rotate 30s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.neural-connections circle {
    animation: pulse 2s ease-in-out infinite;
}

.neural-connections circle:nth-child(odd) {
    animation-delay: 0.5s;
}

.data-streams {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.stream {
    position: absolute;
    width: 2px;
    height: 60px;
    background: linear-gradient(180deg, transparent, var(--primary-400), transparent);
    animation: streamFlow 3s linear infinite;
}

.stream-1 { left: 30%; top: -30px; animation-delay: 0s; }
.stream-2 { right: 30%; top: -30px; animation-delay: 1s; }
.stream-3 { left: 50%; bottom: -30px; animation-delay: 0.5s; }

@keyframes streamFlow {
    0% { transform: translateY(-100%); opacity: 0; }
    50% { opacity: 1; }
    100% { transform: translateY(400px); opacity: 0; }
}

.floating-card {
    position: absolute;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 20px;
    background: rgba(15, 23, 42, 0.9);
    border: 1px solid rgba(59, 130, 246, 0.3);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--gray-200);
    box-shadow: var(--shadow-lg);
    animation: floatCard 6s ease-in-out infinite;
}

.floating-card .mini-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    color: white;
}

.floating-card .mini-icon svg {
    width: 20px;
    height: 20px;
}

.card-1 {
    top: 10%;
    left: -10%;
    animation-delay: 0s;
}

.card-2 {
    bottom: 20%;
    left: -15%;
    animation-delay: 2s;
}

.card-3 {
    top: 15%;
    right: -10%;
    animation-delay: 4s;
}

@keyframes floatCard {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    color: var(--gray-500);
    font-size: 0.8rem;
    animation: fadeInUp 0.8s ease 0.8s forwards;
    opacity: 0;
}

.mouse {
    width: 26px;
    height: 42px;
    border: 2px solid var(--gray-600);
    border-radius: 13px;
    position: relative;
}

.wheel {
    width: 4px;
    height: 10px;
    background: var(--primary-400);
    border-radius: 2px;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll 2s ease-in-out infinite;
}

@keyframes scroll {
    0%, 100% { transform: translateX(-50%) translateY(0); opacity: 1; }
    50% { transform: translateX(-50%) translateY(10px); opacity: 0.3; }
}

/* ===== About Section ===== */
.about {
    padding: var(--section-padding) 0;
    background: var(--bg-dark);
    position: relative;
}

.section-header {
    max-width: 700px;
    margin-bottom: 60px;
}

.section-header.center {
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}

.section-tag {
    display: inline-block;
    padding: 8px 16px;
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--primary-400);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 20px;
}

.section-tag.light {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
    color: var(--gray-200);
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--gray-50);
}

.section-title.light {
    color: white;
}

.section-desc {
    font-size: 1.1rem;
    color: var(--gray-400);
    line-height: 1.8;
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 60px;
}

.about-card {
    padding: 40px 30px;
    background: var(--gradient-card);
    border: 1px solid rgba(59, 130, 246, 0.15);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition-base);
}

.about-card:hover {
    transform: translateY(-8px);
    border-color: rgba(59, 130, 246, 0.4);
    box-shadow: var(--shadow-glow);
}

.about-card .card-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    color: var(--primary-400);
}

.about-card h3 {
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.about-card p {
    color: var(--gray-400);
    font-size: 0.95rem;
}

.about-features {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    padding-top: 40px;
    border-top: 1px solid rgba(59, 130, 246, 0.1);
}

.feature-item {
    flex: 1;
    min-width: 280px;
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 24px;
    background: rgba(59, 130, 246, 0.03);
    border-radius: var(--radius-lg);
    transition: background var(--transition-base);
}

.feature-item:hover {
    background: rgba(59, 130, 246, 0.08);
}

.feature-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    color: white;
}

.feature-icon svg {
    width: 24px;
    height: 24px;
}

.feature-content h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--gray-100);
    margin-bottom: 6px;
}

.feature-content p {
    font-size: 0.9rem;
    color: var(--gray-500);
}

/* ===== Services Section ===== */
.services {
    padding: var(--section-padding) 0;
    position: relative;
    background: var(--bg-dark-secondary);
}

.services-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.services-grid-pattern {
    position: absolute;
    inset: 0;
    background-image: 
        radial-gradient(circle at 1px 1px, rgba(59, 130, 246, 0.08) 1px, transparent 0);
    background-size: 40px 40px;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.service-card {
    position: relative;
    padding: 40px;
    background: var(--bg-card);
    border: 1px solid rgba(59, 130, 246, 0.15);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(10px);
    transition: all var(--transition-base);
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.service-card:hover {
    transform: translateY(-8px);
    border-color: rgba(59, 130, 246, 0.3);
    box-shadow: var(--shadow-glow);
}

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

.service-card.featured {
    background: linear-gradient(180deg, rgba(59, 130, 246, 0.15) 0%, var(--bg-card) 100%);
    border-color: rgba(59, 130, 246, 0.3);
}

.service-card.featured::before {
    opacity: 1;
}

.service-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 24px;
}

.service-icon {
    width: 72px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(59, 130, 246, 0.1);
    border-radius: var(--radius-lg);
    color: var(--primary-400);
    transition: all var(--transition-base);
}

.service-card:hover .service-icon {
    background: var(--gradient-primary);
    color: white;
}

.service-icon svg {
    width: 40px;
    height: 40px;
}

.service-badge {
    padding: 6px 14px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    color: white;
}

.service-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--gray-50);
    margin-bottom: 16px;
}

.service-desc {
    font-size: 0.95rem;
    color: var(--gray-400);
    line-height: 1.7;
    margin-bottom: 24px;
}

.service-features {
    margin-bottom: 28px;
}

.service-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    font-size: 0.9rem;
    color: var(--gray-300);
}

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

.service-features li svg {
    flex-shrink: 0;
    width: 18px;
    height: 18px;
    color: var(--success-400);
}

.service-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--primary-400);
    transition: all var(--transition-base);
}

.service-link svg {
    width: 18px;
    height: 18px;
    transition: transform var(--transition-base);
}

.service-link:hover {
    color: var(--primary-300);
}

.service-link:hover svg {
    transform: translateX(4px);
}

/* ===== Products Section ===== */
.products {
    padding: var(--section-padding) 0;
    background: var(--bg-dark);
    overflow: hidden;
}

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

.product-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: linear-gradient(135deg, rgba(251, 191, 36, 0.2) 0%, rgba(245, 158, 11, 0.2) 100%);
    border: 1px solid rgba(251, 191, 36, 0.3);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 600;
    color: #fbbf24;
    margin-bottom: 24px;
}

.badge-icon {
    width: 16px;
    height: 16px;
}

.product-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    color: var(--gray-50);
    margin-bottom: 12px;
}

.product-slogan {
    font-size: 1.25rem;
    font-weight: 500;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 24px;
}

.product-desc {
    font-size: 1.05rem;
    color: var(--gray-400);
    line-height: 1.8;
    margin-bottom: 40px;
}

.product-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 40px;
}

.pf-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 20px;
    background: rgba(59, 130, 246, 0.05);
    border: 1px solid rgba(59, 130, 246, 0.1);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.pf-item:hover {
    background: rgba(59, 130, 246, 0.1);
    border-color: rgba(59, 130, 246, 0.2);
}

.pf-icon {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    color: white;
}

.pf-icon svg {
    width: 22px;
    height: 22px;
}

.pf-text h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-100);
    margin-bottom: 4px;
}

.pf-text p {
    font-size: 0.85rem;
    color: var(--gray-500);
}

.product-cta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 24px;
}

.download-badges {
    display: flex;
    gap: 12px;
}

.download-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    color: var(--gray-300);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-base);
}

.download-badge:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
}

.download-badge svg {
    width: 20px;
    height: 20px;
}

/* Product Visual - Phone Mockup */
.product-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.phone-mockup {
    position: relative;
}

.phone-frame {
    position: relative;
    width: 300px;
    padding: 12px;
    background: linear-gradient(180deg, #2d3748 0%, #1a202c 100%);
    border-radius: 40px;
    box-shadow: 
        0 0 0 1px rgba(255, 255, 255, 0.1),
        0 20px 60px rgba(0, 0, 0, 0.5),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.phone-notch {
    position: absolute;
    top: 12px;
    left: 50%;
    transform: translateX(-50%);
    width: 120px;
    height: 28px;
    background: #1a202c;
    border-radius: 0 0 20px 20px;
    z-index: 10;
}

.phone-screen {
    background: linear-gradient(180deg, #0f172a 0%, #1e293b 100%);
    border-radius: 32px;
    padding: 50px 20px 30px;
    min-height: 520px;
}

.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.app-header h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--gray-100);
}

.streak-badge {
    padding: 6px 12px;
    background: rgba(251, 191, 36, 0.2);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    color: #fbbf24;
}

.word-card {
    background: linear-gradient(180deg, rgba(59, 130, 246, 0.15) 0%, rgba(59, 130, 246, 0.05) 100%);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: var(--radius-lg);
    padding: 24px;
    text-align: center;
    margin-bottom: 24px;
}

.word-label {
    font-size: 0.75rem;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.word-text {
    font-size: 1.75rem;
    font-weight: 700;
    color: white;
    margin: 8px 0;
}

.word-phonetic {
    font-size: 0.9rem;
    color: var(--primary-400);
    margin-bottom: 8px;
}

.word-meaning {
    font-size: 0.95rem;
    color: var(--gray-300);
    margin-bottom: 16px;
}

.word-example {
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-md);
    padding: 12px;
}

.word-example p {
    font-size: 0.85rem;
    color: var(--gray-400);
    line-height: 1.6;
    font-style: italic;
}

.word-example strong {
    color: var(--primary-400);
}

.progress-section {
    margin-bottom: 20px;
}

.progress-header {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--gray-400);
    margin-bottom: 8px;
}

.progress-bar {
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    transition: width 1s ease;
}

.action-buttons {
    display: flex;
    gap: 12px;
}

.action-btn {
    flex: 1;
    padding: 14px;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 600;
    transition: all var(--transition-base);
}

.action-btn.secondary {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--gray-300);
}

.action-btn.primary {
    background: var(--gradient-primary);
    color: white;
}

.phone-glow {
    position: absolute;
    inset: -50px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.3) 0%, transparent 70%);
    z-index: -1;
    filter: blur(40px);
}

.floating-elements {
    position: absolute;
    inset: -60px;
    pointer-events: none;
}

.floating-el {
    position: absolute;
    width: 50px;
    height: 50px;
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    animation: floatCard 5s ease-in-out infinite;
}

.el-1 {
    top: 10%;
    left: -20%;
    animation-delay: 0s;
}

.el-2 {
    top: 30%;
    right: -25%;
    animation-delay: 1.5s;
}

.el-3 {
    bottom: 20%;
    right: -20%;
    animation-delay: 3s;
}

/* ===== Contact Section ===== */
.contact {
    padding: var(--section-padding) 0;
    position: relative;
    background: var(--bg-dark-secondary);
    overflow: hidden;
}

.contact-bg {
    position: absolute;
    inset: 0;
}

.contact-gradient {
    position: absolute;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, transparent 70%);
    top: -200px;
    right: -200px;
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
}

.contact-desc {
    font-size: 1.05rem;
    color: var(--gray-400);
    line-height: 1.8;
    margin-bottom: 40px;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-method {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px;
    background: rgba(59, 130, 246, 0.05);
    border: 1px solid rgba(59, 130, 246, 0.1);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.contact-method:hover {
    background: rgba(59, 130, 246, 0.1);
    border-color: rgba(59, 130, 246, 0.2);
}

.method-icon {
    flex-shrink: 0;
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    color: white;
}

.method-icon svg {
    width: 24px;
    height: 24px;
}

.method-content h4 {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--gray-400);
    margin-bottom: 4px;
}

.method-content p {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--gray-100);
}

/* Contact Form */
.contact-form-wrapper {
    background: var(--bg-card);
    border: 1px solid rgba(59, 130, 246, 0.15);
    border-radius: var(--radius-xl);
    padding: 48px;
    backdrop-filter: blur(10px);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

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

.form-group label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--gray-300);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 14px 18px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    color: var(--gray-100);
    transition: all var(--transition-base);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--gray-600);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-500);
    background: rgba(59, 130, 246, 0.05);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-group select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    cursor: pointer;
}

.form-group select option {
    background: var(--gray-800);
    color: var(--gray-100);
}

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

.btn-submit {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    padding: 18px 32px;
    font-size: 1rem;
    font-weight: 600;
    color: white;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.3);
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.4);
}

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

/* ===== Footer Contact ===== */
.footer-contact {
    display: flex;
    align-items: center;
    gap: 24px;
}

.footer-contact-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--gray-400);
    transition: color var(--transition-fast);
}

.footer-contact-item:hover {
    color: var(--primary-400);
}

.footer-contact-item svg {
    width: 16px;
    height: 16px;
    color: var(--primary-400);
}

@media (max-width: 768px) {
    .footer-contact {
        flex-direction: column;
        gap: 12px;
        align-items: flex-start;
    }
}

/* ===== Footer ===== */
.footer {
    background: var(--bg-dark);
    border-top: 1px solid rgba(59, 130, 246, 0.1);
}

.footer-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.footer-main {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 80px;
    padding: 80px 0 60px;
}

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

.footer-logo .logo-icon {
    width: 36px;
    height: 36px;
    color: var(--primary-400);
}

.footer-logo span {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--gray-100);
}

.footer-tagline {
    font-size: 0.95rem;
    color: var(--gray-500);
    line-height: 1.7;
    margin-bottom: 28px;
}

.footer-social {
    display: flex;
    gap: 12px;
}

.social-link {
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-md);
    color: var(--gray-400);
    transition: all var(--transition-base);
}

.social-link:hover {
    background: var(--gradient-primary);
    border-color: transparent;
    color: white;
}

.social-link svg {
    width: 20px;
    height: 20px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.footer-col h4 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--gray-200);
    margin-bottom: 20px;
}

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

.footer-col a {
    font-size: 0.9rem;
    color: var(--gray-500);
    transition: color var(--transition-fast);
}

.footer-col a:hover {
    color: var(--primary-400);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-bottom p {
    font-size: 0.85rem;
    color: var(--gray-300);
}

.footer-bottom p a {
    color: var(--primary-400);
    transition: color var(--transition-fast);
}

.footer-bottom p a:hover {
    color: var(--primary-300);
}

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

.footer-legal a {
    font-size: 0.85rem;
    color: var(--gray-400);
}

.footer-legal a:hover {
    color: var(--gray-400);
}

/* ===== Animations ===== */
[data-aos] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-aos].aos-animate {
    opacity: 1;
    transform: translateY(0);
}

[data-aos="fade-right"] {
    transform: translateX(-30px);
}

[data-aos="fade-right"].aos-animate {
    transform: translateX(0);
}

[data-aos="fade-left"] {
    transform: translateX(30px);
}

[data-aos="fade-left"].aos-animate {
    transform: translateX(0);
}

/* ===== Responsive ===== */
@media (max-width: 1200px) {
    .hero-container {
        gap: 60px;
    }
    
    .visual-card {
        width: 320px;
        height: 320px;
    }
    
    .floating-card.card-1 { left: -5%; }
    .floating-card.card-2 { left: -10%; }
    .floating-card.card-3 { right: -5%; }
}

@media (max-width: 1024px) {
    :root {
        --section-padding: 80px;
    }
    
    .nav-menu {
        display: none;
    }
    
    .nav-cta {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content {
        max-width: 600px;
        margin: 0 auto;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-visual {
        display: none;
    }
    
    .about-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .product-showcase {
        grid-template-columns: 1fr;
        gap: 60px;
    }
    
    .product-content {
        text-align: center;
    }
    
    .product-features {
        max-width: 500px;
        margin-left: auto;
        margin-right: auto;
    }
    
    .product-cta {
        justify-content: center;
    }
    
    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 60px;
    }
    
    .footer-main {
        grid-template-columns: 1fr;
        gap: 50px;
    }
    
    .footer-brand {
        text-align: center;
    }
    
    .footer-social {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 60px;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .about-card {
        padding: 30px 24px;
    }
    
    .about-features {
        flex-direction: column;
    }
    
    .feature-item {
        min-width: auto;
    }
    
    .product-features {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .contact-form-wrapper {
        padding: 32px 24px;
    }
    
    .footer-links {
        grid-template-columns: 1fr 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }
    
    .stat-divider {
        width: 50px;
        height: 1px;
    }
    
    .hero-actions {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .service-card {
        padding: 30px 24px;
    }
    
    .phone-frame {
        width: 260px;
    }
    
    .download-badges {
        flex-direction: column;
        width: 100%;
    }
    
    .download-badge {
        justify-content: center;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

/* ===== Mobile Menu ===== */
.nav-menu.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(3, 7, 18, 0.98);
    backdrop-filter: blur(20px);
    padding: 20px;
    gap: 0;
    border-bottom: 1px solid rgba(59, 130, 246, 0.1);
}

.nav-menu.active .nav-link {
    padding: 16px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}