/* ========================================
   FutureTech Academy - 高端企业宣传网站
   现代化科技感设计风格
   ======================================== */

/* CSS Variables - 设计系统 */
:root {
    /* 主色调 */
    --primary-gradient: linear-gradient(135deg, #00d9ff 0%, #0066ff 100%);
    --primary-color: #0066ff;
    --primary-light: #00d9ff;
    --primary-dark: #0040cc;
    
    /* 辅助色 */
    --accent-cyan: #00ffff;
    --accent-purple: #6633ff;
    --accent-pink: #ff3399;
    
    /* 中性色 */
    --white: #ffffff;
    --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;
    --black: #000000;
    
    /* 语义色 */
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    
    /* 字体 */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* 间距 */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* 圆角 */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* 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);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 40px rgba(0, 217, 255, 0.3);
    
    /* 过渡 */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
    
    /* 布局 */
    --container-max: 1280px;
    --header-height: 80px;
}

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

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

body {
    font-family: var(--font-family);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--gray-900);
    background-color: var(--white);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

ul {
    list-style: none;
}

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
    transition: all var(--transition-base);
}

/* Container */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

/* ========================================
   Header / Navigation
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: transparent;
    transition: background 0.5s cubic-bezier(0.4, 0, 0.2, 1),
                box-shadow 0.5s cubic-bezier(0.4, 0, 0.2, 1),
                border-color 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    will-change: background, box-shadow;
}

.header.scrolled {
    background: #ffffff;
    box-shadow:
        0 1px 3px rgba(0, 0, 0, 0.08),
        0 4px 12px rgba(0, 0, 0, 0.05);
    border-bottom: 1px solid #e5e7eb;
}

.navbar {
    height: var(--header-height);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.logo:hover {
    transform: scale(1.03) rotate(-1deg);
}

.logo-icon {
    width: 48px;
    height: 48px;
}

.logo-svg {
    width: 100%;
    height: 100%;
    filter: drop-shadow(0 2px 8px rgba(0, 217, 255, 0.4));
}

.logo-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 4px;
    filter: drop-shadow(0 2px 8px rgba(0, 217, 255, 0.4));
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff;
    letter-spacing: -0.02em;
    transition: color 0.45s ease-out;
}

.header.scrolled .logo-text {
    color: var(--gray-900);
}

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

/* Nav Menu */
.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.nav-item {
    position: relative;
}

.nav-link {
    display: block;
    padding: 8px 18px;
    font-size: 0.925rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.85);
    border-radius: var(--radius-md);
    transition: color 0.35s ease,
                background 0.35s ease,
                transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 16px;
    height: 2px;
    background: #fff;
    border-radius: 1px;
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.nav-link:hover,
.nav-link.active {
    color: #fff;
    background: rgba(255, 255, 255, 0.12);
    transform: translateY(-1px);
}

.nav-link:hover::after,
.nav-link.active::after {
    transform: translateX(-50%) scaleX(1);
}

/* 滚动后的导航链接 */
.header.scrolled .nav-link {
    color: #374151;
}

.header.scrolled .nav-link::after {
    background: var(--primary-color);
}

.header.scrolled .nav-link:hover,
.header.scrolled .nav-link.active {
    color: var(--primary-color);
    background: rgba(0, 102, 255, 0.06);
}

/* Dropdown */
.nav-item.has-dropdown {
    position: relative;
}

.dropdown {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    opacity: 0;
    visibility: hidden;
    min-width: 600px;
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
    transition: all var(--transition-slow);
    overflow: hidden;
}

.nav-item.has-dropdown:hover .dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(16px);
}

.dropdown-content {
    padding: var(--spacing-xl);
}

.dropdown-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.dropdown-item:hover {
    background: var(--gray-50);
    transform: translateX(4px);
}

.dropdown-icon {
    font-size: 2.5rem;
    flex-shrink: 0;
}

.dropdown-info h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--spacing-xs);
}

.dropdown-info p {
    font-size: 0.875rem;
    color: var(--gray-500);
}

/* Nav Actions */
.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.btn-register {
    padding: 8px 22px;
    background: var(--primary-gradient);
    color: var(--white);
    font-size: 0.925rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1),
                box-shadow 0.4s ease;
    box-shadow: 0 2px 12px rgba(0, 102, 255, 0.35);
}

.btn-register:hover {
    transform: translateY(-3px) scale(1.03);
    box-shadow: 0 8px 24px rgba(0, 102, 255, 0.45);
}

.header.scrolled .btn-register {
    box-shadow: 0 2px 10px rgba(0, 102, 255, 0.3);
}

/* Mobile Toggle */
.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--spacing-sm);
}

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

.header.scrolled .mobile-toggle span {
    background: #374151;
}

/* ========================================
   Hero - 2026竞赛宣传（重新设计）
   ======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: #0a1628;
}

/* 动态渐变背景 */
.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 60% at 20% 40%, rgba(30, 80, 180, 0.35) 0%, transparent 70%),
        radial-gradient(ellipse 60% 50% at 80% 30%, rgba(0, 150, 220, 0.25) 0%, transparent 60%),
        radial-gradient(ellipse 90% 70% at 50% 100%, rgba(0, 80, 160, 0.3) 0%, transparent 65%),
        linear-gradient(165deg, #061530 0%, #0c2a5c 35%, #0d3b7a 60%, #082850 100%);
    animation: bgShift 16s cubic-bezier(0.4, 0, 0.6, 1) infinite alternate;
}
@keyframes bgShift {
    0% { filter: hue-rotate(0deg) brightness(1); }
    100% { filter: hue-rotate(6deg) brightness(1.04); }
}

/* 主内容区 */
.hero-content {
    position: relative;
    z-index: 10;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 32px;
    padding: 120px 24px 80px;
    max-width: 1100px;
    width: 100%;
    box-sizing: border-box;
}

/* 海报框架 */
.poster-frame {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    box-shadow:
        0 4px 6px rgba(0,0,0,0.3),
        0 20px 60px rgba(0, 60, 140, 0.25),
        0 0 120px rgba(0, 120, 220, 0.15);
    max-width: 900px;
    width: 100%;
    transform: perspective(1200px) rotateX(1deg);
    transition: transform 0.7s cubic-bezier(0.23, 1, 0.32, 1),
                box-shadow 0.7s ease;
    animation: posterFloat 8s cubic-bezier(0.36, 0, 0.66, -0.56) infinite;
    will-change: transform;
}
@keyframes posterFloat {
    0%, 100% { transform: perspective(1200px) rotateX(1deg) translateY(0); }
    33% { transform: perspective(1200px) rotateX(0.3deg) translateY(-6px); }
    66% { transform: perspective(1200px) rotateX(0.6deg) translateY(-4px); }
}

.poster-frame:hover {
    transform: perspective(1200px) rotateX(0deg) scale(1.02);
    box-shadow:
        0 12px 28px rgba(0,0,0,0.35),
        0 36px 90px rgba(0, 60, 140, 0.38),
        0 0 180px rgba(0, 120, 220, 0.22);
    animation-play-state: paused;
}

.poster-link {
    display: block;
    line-height: 0;
}

.poster-img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 16px;
    transition: transform 0.7s cubic-bezier(0.23, 1, 0.32, 1);
}

.poster-frame:hover .poster-img {
    transform: scale(1.03);
}

/* 海报底部光晕 */
.poster-glow {
    position: absolute;
    bottom: -30px;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    height: 60px;
    background: radial-gradient(ellipse at center, rgba(0, 140, 255, 0.25) 0%, transparent 70%);
    filter: blur(20px);
    pointer-events: none;
    animation: glowPulse 4s ease-in-out infinite alternate;
}
@keyframes glowPulse {
    0% { opacity: 0.6; transform: translateX(-50%) scaleX(0.9); }
    100% { opacity: 1; transform: translateX(-50%) scaleX(1.05); }
}

/* CTA 文字区域 */
.hero-cta {
    text-align: center;
}
.hero-subtitle {
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: rgba(100, 200, 255, 0.85);
    margin-bottom: 8px;
    text-shadow: 0 0 20px rgba(0, 150, 255, 0.4);
    opacity: 0;
    animation: slideUpFadeIn 0.9s cubic-bezier(0.22, 1, 0.36, 1) 0.4s both;
}

.hero-title {
    font-size: clamp(22px, 4vw, 36px);
    font-weight: 800;
    color: #ffffff;
    line-height: 1.3;
    letter-spacing: 2px;
    margin-bottom: 12px;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.4);
    opacity: 0;
    animation: slideUpFadeIn 0.9s cubic-bezier(0.22, 1, 0.36, 1) 0.65s both;
}

.hero-title .highlight {
    background: linear-gradient(135deg, #64d2ff 0%, #a78bfa 50%, #fbbf24 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    font-size: 15px;
    color: rgba(180, 210, 240, 0.75);
    margin-bottom: 24px;
    letter-spacing: 0.5px;
    opacity: 0;
    animation: slideUpFadeIn 0.9s cubic-bezier(0.22, 1, 0.36, 1) 0.9s both;
}

.cta-btn {
    opacity: 0;
    animation: slideUpFadeIn 0.9s cubic-bezier(0.22, 1, 0.36, 1) 1.15s both;
}

@keyframes slideUpFadeIn {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* CTA 按钮 */
.cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 36px;
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 50%, #1e40af 100%);
    color: #ffffff;
    font-size: 16px;
    font-weight: 700;
    letter-spacing: 1px;
    border-radius: 50px;
    text-decoration: none;
    box-shadow:
        0 4px 20px rgba(37, 99, 235, 0.45),
        inset 0 1px 0 rgba(255, 255, 255, 0.15);
    transition: transform 0.45s cubic-bezier(0.34, 1.56, 0.64, 1),
                box-shadow 0.45s ease,
                background-position 0.4s ease;
    position: relative;
    overflow: hidden;
    background-size: 200% 200%;
}

.cta-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 60%;
    height: 100%;
    background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.25) 50%, transparent 100%);
    transition: left 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

.cta-btn:hover {
    transform: translateY(-3px) scale(1.04);
    background-position: 100% 0;
    box-shadow:
        0 10px 36px rgba(37, 99, 235, 0.55),
        inset 0 1px 0 rgba(255, 255, 255, 0.25);
}

.cta-btn:hover::before {
    left: 150%;
}

.cta-btn svg {
    width: 18px;
    height: 18px;
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.cta-btn:hover svg {
    transform: translateX(5px);
}

/* 粒子装饰 */
.hero-particles {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}

.particle {
    position: absolute;
    border-radius: 50%;
    background: rgba(100, 200, 255, 0.18);
    animation: particleFloat cubic-bezier(0.36, 0, 0.66, -0.56) infinite;
}

.p1 { width: 6px; height: 6px; top: 15%; left: 8%; animation-duration: 10s; animation-delay: 0s; }
.p2 { width: 4px; height: 4px; top: 25%; right: 12%; animation-duration: 13s; animation-delay: 1.5s; }
.p3 { width: 8px; height: 8px; bottom: 20%; left: 15%; animation-duration: 15s; animation-delay: 3s; }
.p4 { width: 5px; height: 5px; top: 60%; right: 8%; animation-duration: 11s; animation-delay: 0.8s; }
.p5 { width: 7px; height: 7px; bottom: 35%; right: 25%; animation-duration: 14s; animation-delay: 4s; }
.p6 { width: 4px; height: 4px; top: 40%; left: 5%; animation-duration: 16s; animation-delay: 2s; }

@keyframes particleFloat {
    0% {
        transform: translate(0, 0) scale(1);
        opacity: 0;
    }
    15% {
        opacity: 0.9;
    }
    50% {
        transform: translate(25px, -70px) scale(1.15);
        opacity: 0.55;
    }
    80% {
        opacity: 0.2;
    }
    100% {
        transform: translate(-15px, -140px) scale(0.5);
        opacity: 0;
    }
}

/* 响应式 */
@media (max-width: 768px) {
    .hero-content {
        gap: 24px;
        padding: 100px 16px 60px;
    }

    .poster-frame {
        border-radius: 12px;
        transform: none;
        animation: none;
    }

    .poster-frame:hover {
        transform: scale(1.01);
    }

    .hero-title {
        font-size: 20px;
        letter-spacing: 1px;
    }

    .hero-subtitle {
        font-size: 12px;
        letter-spacing: 2px;
    }

    .cta-btn {
        padding: 12px 28px;
        font-size: 14px;
    }

    .particle { display: none; }
}

/* ========================================
   Features Section
   ======================================== */
.features {
    padding: var(--spacing-3xl) 0;
    background: var(--gray-50);
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-3xl);
}

.section-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-lg);
    background: rgba(0, 102, 255, 0.1);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--gray-900);
    line-height: 1.2;
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.02em;
}

.section-description {
    font-size: 1.125rem;
    color: var(--gray-500);
    line-height: 1.7;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}

.feature-card {
    background: var(--white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-slow);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
    transform: scaleX(0);
    transition: transform var(--transition-slow);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-icon {
    font-size: 3.5rem;
    margin-bottom: var(--spacing-lg);
}

.feature-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--spacing-md);
}

.feature-card p {
    color: var(--gray-500);
    line-height: 1.7;
    margin-bottom: var(--spacing-xl);
}

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

.feature-link:hover {
    gap: var(--spacing-md);
}

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

/* ========================================
   Stats Section
   ======================================== */
.stats {
    padding: var(--spacing-3xl) 0;
    background: var(--gray-900);
    position: relative;
    overflow: hidden;
}

.stats::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(0, 217, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(0, 102, 255, 0.1) 0%, transparent 50%);
}

.stats-grid {
    position: relative;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-2xl);
    text-align: center;
}

.stat-item {
    padding: var(--spacing-xl);
}

.stat-number {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

.stat-label {
    font-size: 1.125rem;
    color: var(--gray-400);
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: var(--gray-900);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
    border-top: 1px solid var(--gray-800);
}

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

.footer-brand .logo {
    margin-bottom: var(--spacing-lg);
}

.footer-brand p {
    color: var(--gray-400);
    line-height: 1.7;
    margin-bottom: var(--spacing-xl);
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
}

.social-link {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--gray-800);
    color: var(--gray-300);
    font-size: 0.875rem;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

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

.footer-links h4,
.footer-newsletter h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: var(--spacing-lg);
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.footer-links a,
.footer-links li {
    color: var(--gray-400);
    font-size: 0.95rem;
    transition: color var(--transition-base);
}

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

.footer-newsletter p {
    color: var(--gray-400);
    font-size: 0.95rem;
    margin-bottom: var(--spacing-lg);
}

.newsletter-form {
    display: flex;
    gap: var(--spacing-sm);
}

.newsletter-form input {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--gray-800);
    border: 1px solid var(--gray-700);
    border-radius: var(--radius-md);
    color: var(--white);
    font-size: 0.95rem;
    transition: all var(--transition-base);
}

.newsletter-form input::placeholder {
    color: var(--gray-500);
}

.newsletter-form input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.1);
}

.newsletter-form button {
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--primary-gradient);
    color: var(--white);
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.newsletter-form button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 102, 255, 0.4);
}

.footer-bottom {
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--gray-800);
    text-align: center;
}

.footer-bottom p {
    color: var(--gray-500);
    font-size: 0.875rem;
}

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

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

@keyframes scroll {
    0% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
    100% {
        opacity: 0;
        transform: translateX(-50%) translateY(12px);
    }
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 70px;
    }
    
    .nav-menu {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: var(--spacing-xl);
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .mobile-toggle {
        display: flex;
    }
    
    .nav-actions .btn-register {
        display: none;
    }
    
    .dropdown {
        position: static;
        transform: none;
        opacity: 1;
        visibility: visible;
        box-shadow: none;
        min-width: auto;
        display: none;
    }
    
    .nav-item.has-dropdown:hover .dropdown {
        display: block;
    }
    
    .dropdown-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
    
    .slide-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .carousel-control {
        width: 44px;
        height: 44px;
    }
    
    .carousel-control.prev {
        left: var(--spacing-md);
    }
    
    .carousel-control.next {
        right: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .logo-text {
        font-size: 1.25rem;
    }
    
    .logo-icon {
        width: 40px;
        height: 40px;
    }
    
    .btn {
        padding: var(--spacing-md) var(--spacing-xl);
        font-size: 0.9rem;
    }
}