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

:root {
    --primary-color: #6366F1;
    --primary-dark: #4F46E5;
    --primary-light: #818CF8;
    --accent-color: #EC4899;
    --accent-light: #F472B6;
    --text-dark: #1F2937;
    --text-medium: #4B5563;
    --text-light: #6B7280;
    --bg-white: #FFFFFF;
    --bg-light: #F9FAFB;
    --bg-gradient-start: #667EEA;
    --bg-gradient-end: #764BA2;
    --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);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
    overflow-x: hidden;
}

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

/* Header Styles */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.header.scrolled {
    padding: 15px 0;
    box-shadow: var(--shadow-md);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo h1 {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 32px;
    font-weight: 800;
    margin-bottom: 4px;
    letter-spacing: -0.5px;
}

.logo p {
    color: var(--text-medium);
    font-size: 13px;
    margin: 0;
    font-weight: 500;
}

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

.nav-link {
    color: var(--text-dark);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    position: relative;
    transition: color 0.3s ease;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transition: width 0.3s ease;
}

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

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

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

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

.mobile-menu-toggle span {
    width: 28px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: 3px;
    transition: 0.3s;
}

.mobile-menu {
    display: none;
    flex-direction: column;
    background: var(--bg-white);
    padding: 24px;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    box-shadow: var(--shadow-lg);
    border-top: 1px solid rgba(0, 0, 0, 0.05);
}

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

.mobile-nav-link {
    color: var(--text-dark);
    text-decoration: none;
    padding: 14px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    font-weight: 500;
    transition: color 0.3s ease;
}

.mobile-nav-link:hover {
    color: var(--primary-color);
}

.mobile-menu-buttons {
    display: flex;
    gap: 12px;
    margin-top: 20px;
}

/* Button Styles */
.btn {
    padding: 12px 28px;
    border-radius: 8px;
    text-decoration: none;
    font-size: 15px;
    font-weight: 600;
    display: inline-block;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    color: var(--bg-white);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

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

.btn-primary::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn-primary:hover::before {
    width: 300px;
    height: 300px;
}

.btn-secondary {
    background: transparent;
    color: var(--text-dark);
    border: 2px solid var(--text-dark);
}

.btn-secondary:hover {
    background: var(--text-dark);
    color: var(--bg-white);
    transform: translateY(-2px);
}

.btn-hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    color: var(--bg-white);
    padding: 18px 45px;
    font-size: 17px;
    margin-top: 35px;
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.4);
    border-radius: 12px;
}

.btn-hero:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(99, 102, 241, 0.5);
}

.btn-feature {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    color: var(--bg-white);
    padding: 16px 40px;
    font-size: 16px;
    border-radius: 12px;
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

.btn-feature:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.5);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667EEA 0%, #764BA2 50%, #F093FB 100%);
    padding: 140px 0 120px;
    text-align: center;
    color: var(--bg-white);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="100" height="100" patternUnits="userSpaceOnUse"><path d="M 100 0 L 0 0 0 100" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 56px;
    font-weight: 800;
    margin-bottom: 24px;
    line-height: 1.2;
    letter-spacing: -1px;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.hero-subtitle {
    font-size: 20px;
    line-height: 1.8;
    margin-bottom: 40px;
    opacity: 0.95;
    font-weight: 400;
}

/* Features Section */
.features {
    padding: 100px 0;
    background: linear-gradient(to bottom, var(--bg-white) 0%, var(--bg-light) 100%);
    position: relative;
}

.section-title {
    text-align: center;
    font-size: 42px;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 70px;
    letter-spacing: -1px;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: 2px;
}

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

.feature-card {
    text-align: center;
    padding: 45px 30px;
    border-radius: 20px;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    background: var(--bg-white);
    border: 2px solid transparent;
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.feature-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: var(--shadow-xl);
    border-color: rgba(99, 102, 241, 0.2);
}

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

.feature-icon {
    width: 90px;
    height: 90px;
    margin: 0 auto 25px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    border-radius: 20px;
    color: var(--bg-white);
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.3);
    transition: transform 0.4s ease;
}

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

.feature-card:nth-child(2) .feature-icon {
    background: linear-gradient(135deg, #10B981 0%, #059669 100%);
    box-shadow: 0 8px 20px rgba(16, 185, 129, 0.3);
}

.feature-card:nth-child(3) .feature-icon {
    background: linear-gradient(135deg, #F59E0B 0%, #D97706 100%);
    box-shadow: 0 8px 20px rgba(245, 158, 11, 0.3);
}

.feature-card:nth-child(4) .feature-icon {
    background: linear-gradient(135deg, #8B5CF6 0%, #7C3AED 100%);
    box-shadow: 0 8px 20px rgba(139, 92, 246, 0.3);
}

.feature-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 16px;
}

.feature-description {
    font-size: 15px;
    color: var(--text-medium);
    line-height: 1.7;
}

.features-cta {
    text-align: center;
    margin-top: 60px;
}

/* Footer Styles */
.footer {
    background: linear-gradient(135deg, #1F2937 0%, #111827 100%);
    color: var(--bg-white);
    padding: 80px 0 40px;
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 50px;
    margin-bottom: 50px;
}

.footer-section h4 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--bg-white);
    background: linear-gradient(135deg, var(--primary-light), var(--accent-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-section p {
    font-size: 15px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.7);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 40px;
    text-align: center;
}

.copyright {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 12px;
}

.contact {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 30px;
}

.contact a {
    color: var(--primary-light);
    text-decoration: none;
    transition: color 0.3s ease;
}

.contact a:hover {
    color: var(--accent-light);
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-top: 30px;
}

.social-link {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    color: rgba(255, 255, 255, 0.8);
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.social-link:hover {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: var(--bg-white);
    transform: translateY(-4px) rotate(5deg);
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.4);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav,
    .header-buttons {
        display: none;
    }

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

    .hero {
        padding: 100px 0 80px;
    }

    .hero-title {
        font-size: 36px;
    }

    .hero-subtitle {
        font-size: 17px;
    }

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

    .features {
        padding: 70px 0;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .logo h1 {
        font-size: 28px;
    }

    .logo p {
        font-size: 12px;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 80px 0 60px;
    }

    .hero-title {
        font-size: 28px;
    }

    .features {
        padding: 60px 0;
    }

    .section-title {
        font-size: 26px;
        margin-bottom: 50px;
    }

    .btn-hero {
        padding: 16px 35px;
        font-size: 15px;
    }

    .feature-card {
        padding: 35px 24px;
    }
}

/* Smooth Scroll */
html {
    scroll-behavior: smooth;
}

/* Floating Animation */
@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.feature-card {
    animation: fadeInUp 0.6s ease forwards;
}

.feature-card:nth-child(1) {
    animation-delay: 0.1s;
}

.feature-card:nth-child(2) {
    animation-delay: 0.2s;
}

.feature-card:nth-child(3) {
    animation-delay: 0.3s;
}

.feature-card:nth-child(4) {
    animation-delay: 0.4s;
}

/* Decorative Elements */
.hero-content::before {
    content: '';
    position: absolute;
    top: -50px;
    left: -50px;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 6s ease-in-out infinite;
}

.hero-content::after {
    content: '';
    position: absolute;
    bottom: -50px;
    right: -50px;
    width: 150px;
    height: 150px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 8s ease-in-out infinite;
}