/* ========================================
   秒如科技官网 - AI时代的安卓
   现代化科技风格样式设计
   ======================================== */

/* CSS Variables */
:root {
    --primary-color: #00d4ff;
    --primary-dark: #0099cc;
    --secondary-color: #7c3aed;
    --accent-color: #f59e0b;
    --bg-dark: #0a0a0f;
    --bg-card: #111118;
    --bg-card-hover: #1a1a24;
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --text-muted: #6b6b7b;
    --border-color: rgba(255, 255, 255, 0.1);
    --gradient-primary: linear-gradient(135deg, #00d4ff 0%, #7c3aed 100%);
    --gradient-secondary: linear-gradient(135deg, #7c3aed 0%, #f59e0b 100%);
    --gradient-hero: linear-gradient(180deg, #0a0a0f 0%, #1a1a2e 50%, #0a0a0f 100%);
    --shadow-sm: 0 4px 20px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 40px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 60px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px rgba(0, 212, 255, 0.3);
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

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

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

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

ul {
    list-style: none;
}

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

/* Container */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

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

.navbar.scrolled {
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(20px);
    padding: 15px 0;
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

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

.logo-icon {
    font-size: 28px;
}

.logo-text {
    font-size: 24px;
    font-weight: 700;
    letter-spacing: 2px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-tag {
    font-size: 12px;
    padding: 4px 10px;
    background: var(--gradient-primary);
    border-radius: 20px;
    font-weight: 600;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 40px;
    margin-right: 40px;
}

.nav-links a {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-normal);
}

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

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

.btn-nav {
    padding: 10px 24px;
    background: var(--gradient-primary);
    border-radius: 30px;
    font-weight: 600;
    color: var(--text-primary) !important;
}

.btn-nav:hover {
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}

.btn-nav::after {
    display: none !important;
}

.lang-switch-item {
    margin-left: 10px;
}

.lang-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 6px 12px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 50px;
}

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
}

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

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 30px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-normal);
    border: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--text-primary);
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 60px rgba(0, 212, 255, 0.5);
}

.btn-outline {
    background: transparent;
    border: 2px solid rgba(255, 255, 255, 0.3);
    color: var(--text-primary);
}

.btn-outline:hover {
    border-color: var(--primary-color);
    background: rgba(0, 212, 255, 0.1);
}

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

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

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.5;
    animation: float 20s infinite ease-in-out;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: var(--primary-color);
    top: -200px;
    right: -200px;
    animation-delay: 0s;
}

.orb-2 {
    width: 500px;
    height: 500px;
    background: var(--secondary-color);
    bottom: -150px;
    left: -150px;
    animation-delay: -7s;
}

.orb-3 {
    width: 400px;
    height: 400px;
    background: var(--accent-color);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -14s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(50px, -50px) scale(1.1); }
    50% { transform: translate(0, -100px) scale(0.9); }
    75% { transform: translate(-50px, -50px) scale(1.05); }
}

.grid-overlay {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
}

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

.hero-badge {
    display: inline-block;
    padding: 10px 24px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 30px;
    font-size: 14px;
    font-weight: 500;
    color: var(--primary-color);
    margin-bottom: 32px;
    animation: fadeInUp 0.8s ease;
}

.hero-title {
    margin-bottom: 24px;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.title-line {
    display: block;
    font-size: 48px;
    font-weight: 400;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.title-main {
    display: block;
    font-size: clamp(48px, 10vw, 80px);
    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;
}

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

.hero-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 48px;
    line-height: 1.8;
    animation: fadeInUp 0.8s ease 0.4s both;
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 48px;
    margin-bottom: 48px;
    animation: fadeInUp 0.8s ease 0.6s both;
}

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

.stat-number {
    display: block;
    font-size: 36px;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 14px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border-color);
}

.hero-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    animation: fadeInUp 0.8s ease 0.8s both;
}

.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    color: var(--text-muted);
    font-size: 13px;
    animation: fadeIn 1s ease 1.2s both;
}

.scroll-indicator {
    width: 24px;
    height: 40px;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    position: relative;
}

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

@keyframes scrollDown {
    0% { opacity: 1; transform: translateX(-50%) translateY(0); }
    100% { opacity: 0; transform: translateX(-50%) translateY(16px); }
}

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

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

/* ========================================
   Section Styles
   ======================================== */
section {
    padding: 120px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-header.light {
    color: var(--text-primary);
}

.section-tag {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(124, 58, 237, 0.1);
    border: 1px solid rgba(124, 58, 237, 0.3);
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    color: var(--secondary-color);
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.section-header.light .section-tag {
    background: rgba(0, 212, 255, 0.1);
    border-color: rgba(0, 212, 255, 0.3);
    color: var(--primary-color);
}

.section-title {
    font-size: clamp(32px, 5vw, 48px);
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -1px;
}

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

/* ========================================
   About Section
   ======================================== */
.about {
    background: linear-gradient(180deg, var(--bg-dark) 0%, #0f0f18 100%);
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 40px;
}

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

.about-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 32px;
    transition: var(--transition-normal);
}

.about-card:hover {
    transform: translateY(-8px);
    border-color: rgba(0, 212, 255, 0.3);
    box-shadow: var(--shadow-lg);
}

.card-icon {
    font-size: 40px;
    margin-bottom: 20px;
}

.about-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 16px;
}

.about-card p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.about-card strong {
    color: var(--primary-color);
}

.about-sidebar {
    position: sticky;
    top: 120px;
    height: fit-content;
}

.team-card {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1) 0%, rgba(124, 58, 237, 0.1) 100%);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 24px;
    padding: 32px;
}

.team-header {
    margin-bottom: 24px;
}

.team-badge {
    display: inline-block;
    padding: 6px 14px;
    background: var(--gradient-primary);
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 12px;
}

.team-header h3 {
    font-size: 24px;
    font-weight: 700;
}

.team-features {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 32px;
}

.team-feature {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.feature-icon {
    font-size: 24px;
    flex-shrink: 0;
}

.feature-content h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}

.feature-content p {
    font-size: 14px;
    color: var(--text-muted);
}

.team-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
}

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

.stat-value {
    display: block;
    font-size: 28px;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ========================================
   Highlights Section
   ======================================== */
.highlights {
    background: linear-gradient(180deg, #0f0f18 0%, var(--bg-dark) 100%);
}

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

.highlight-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 32px;
    text-align: center;
    transition: var(--transition-normal);
}

.highlight-card:hover {
    transform: translateY(-8px);
    border-color: rgba(0, 212, 255, 0.3);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.highlight-icon {
    font-size: 48px;
    margin-bottom: 20px;
    display: inline-block;
}

.highlight-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 16px;
}

.highlight-card p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ========================================
   Products Section
   ======================================== */
.products {
    background: var(--bg-dark);
}

.products-tabs {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 12px 28px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 30px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-normal);
}

.tab-btn:hover,
.tab-btn.active {
    background: var(--gradient-primary);
    border-color: transparent;
    color: var(--text-primary);
}

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

.product-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 28px;
    position: relative;
    overflow: hidden;
    transition: var(--transition-normal);
}

.product-card:hover {
    transform: translateY(-8px);
    border-color: rgba(0, 212, 255, 0.3);
    box-shadow: var(--shadow-lg);
}

.product-card.hidden {
    display: none;
}

.product-number {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 48px;
    font-weight: 800;
    color: rgba(255, 255, 255, 0.03);
}

.product-icon {
    font-size: 40px;
    margin-bottom: 20px;
}

.product-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
}

.product-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 20px;
}

.product-features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.product-features span {
    padding: 6px 12px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 20px;
    font-size: 12px;
    color: var(--primary-color);
}

/* ========================================
   Technology Section
   ======================================== */
.technology {
    background: linear-gradient(180deg, var(--bg-dark) 0%, #0a0a12 100%);
}

.tech-showcase {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.tech-card {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1) 0%, rgba(124, 58, 237, 0.1) 100%);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 24px;
    padding: 40px;
}

.tech-header {
    margin-bottom: 24px;
}

.tech-badge {
    display: inline-block;
    padding: 6px 14px;
    background: var(--gradient-primary);
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 12px;
}

.tech-card h3 {
    font-size: 28px;
    font-weight: 700;
}

.tech-card > p {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.tech-comparison {
    display: flex;
    align-items: center;
    gap: 20px;
}

.comparison-item {
    flex: 1;
    text-align: center;
    padding: 20px;
    background: var(--bg-card);
    border-radius: 16px;
}

.comparison-item.highlight {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.2) 0%, rgba(124, 58, 237, 0.2) 100%);
    border: 1px solid rgba(0, 212, 255, 0.3);
}

.comp-label {
    display: block;
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.comp-value {
    font-size: 32px;
    font-weight: 800;
}

.comparison-item.highlight .comp-value {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.comparison-arrow {
    font-size: 24px;
    color: var(--primary-color);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.tech-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 28px;
    text-align: center;
    transition: var(--transition-normal);
}

.tech-item:hover {
    transform: translateY(-5px);
    border-color: rgba(0, 212, 255, 0.3);
}

.tech-icon {
    font-size: 36px;
    margin-bottom: 16px;
}

.tech-item h4 {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.tech-stat {
    font-size: 36px;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ========================================
   Scenarios Section
   ======================================== */
.scenarios {
    background: linear-gradient(180deg, #0a0a12 0%, var(--bg-dark) 100%);
}

.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 24px;
}

.scenario-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 32px 24px;
    text-align: center;
    transition: var(--transition-normal);
}

.scenario-card:hover {
    transform: translateY(-8px);
    border-color: rgba(0, 212, 255, 0.3);
    box-shadow: var(--shadow-lg);
}

.scenario-icon {
    font-size: 48px;
    margin-bottom: 20px;
    display: inline-block;
}

.scenario-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 12px;
}

.scenario-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ========================================
   Partners Section
   ======================================== */
.partners {
    background: var(--bg-dark);
}

.partners-content {
    display: flex;
    flex-direction: column;
    gap: 60px;
}

.partner-group h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 32px;
    color: var(--text-secondary);
}

.partner-logos {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
}

.partner-item {
    display: flex;
    align-items: center;
    gap: 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 20px 28px;
    transition: var(--transition-normal);
}

.partner-item:hover {
    transform: translateY(-5px);
    border-color: rgba(0, 212, 255, 0.3);
}

.partner-logo {
    font-size: 32px;
}

.partner-item span {
    font-size: 16px;
    font-weight: 600;
}

.investor-logos {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 24px;
}

.investor-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
    text-align: center;
    transition: var(--transition-normal);
}

.investor-item:hover {
    transform: translateY(-5px);
    border-color: rgba(0, 212, 255, 0.3);
}

.investor-logo {
    font-size: 18px;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 12px;
}

.investor-item p {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.5;
}

/* ========================================
   Contact Section
   ======================================== */
.contact {
    background: linear-gradient(180deg, var(--bg-dark) 0%, #0f0f18 100%);
}

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

.contact-info h2 {
    font-size: 42px;
    font-weight: 800;
    margin-bottom: 16px;
}

.contact-info > p {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

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

.contact-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.contact-icon {
    font-size: 24px;
    flex-shrink: 0;
}

.contact-item h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.contact-item p {
    font-size: 18px;
    font-weight: 500;
}

.contact-form-wrapper {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 40px;
}

.contact-form h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 32px;
}

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

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-secondary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 20px;
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    font-size: 15px;
    color: var(--text-primary);
    transition: var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

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

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

/* ========================================
   Footer
   ======================================== */
.footer {
    background: #050508;
    padding: 80px 0 40px;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-brand p {
    font-size: 15px;
    color: var(--text-muted);
    margin: 16px 0 24px;
}

.social-links {
    display: flex;
    gap: 16px;
}

.social-link {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    font-size: 20px;
    transition: var(--transition-normal);
}

.social-link:hover {
    background: var(--gradient-primary);
    border-color: transparent;
    transform: translateY(-3px);
}

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

.footer-column h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
}

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

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

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    padding-top: 40px;
    border-top: 1px solid var(--border-color);
}

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

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1200px) {
    .products-grid {
        grid-template-columns: repeat(3, 1fr);
    }

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

@media (max-width: 992px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(10, 10, 15, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 24px;
        gap: 20px;
    }

    .nav-links.active {
        display: flex;
    }

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

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

    .about-main {
        grid-template-columns: 1fr;
    }

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

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

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

    .tech-showcase {
        grid-template-columns: 1fr;
    }

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

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

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

@media (max-width: 768px) {
    section {
        padding: 80px 0;
    }

    .hero-stats {
        flex-direction: column;
        gap: 24px;
    }

    .stat-divider {
        width: 40px;
        height: 1px;
    }

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

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

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

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

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

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

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

    .investor-logos {
        grid-template-columns: 1fr;
    }

    .partner-logos {
        flex-direction: column;
    }

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

    .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .tech-comparison {
        flex-direction: column;
    }

    .comparison-arrow {
        transform: rotate(90deg);
    }
}

/* Animation Classes */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}