:root {
    --primary: #4F46E5;
    --primary-hover: #4338CA;
    --text-main: #1F2937;
    --text-muted: #6B7280;
    --bg-main: #FFFFFF;
    --bg-light: #F9FAFB;
    --border: #E5E7EB;
}

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

html {
    scroll-behavior: smooth;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-main);
}

body {
    background-color: var(--bg-main);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 72px;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    z-index: 100;
    transition: all 0.3s;
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

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

.nav {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: var(--text-muted);
    font-weight: 500;
    transition: color 0.3s;
}

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

.btn-primary {
    display: inline-block;
    padding: 0.5rem 1.25rem;
    background-color: var(--primary);
    color: white;
    text-decoration: none;
    border-radius: 9999px;
    font-weight: 500;
    transition: background-color 0.3s;
    white-space: nowrap;
}

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

/* Mobile Nav Toggle */
.mobile-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-main);
}

/* Hero */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(135deg, #EEF2FF 0%, #E0E7FF 100%);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at center, rgba(79, 70, 229, 0.1) 0%, transparent 70%);
    animation: pulse 8s infinite alternate;
}

@keyframes pulse {
    0% { transform: scale(1); }
    100% { transform: scale(1.1); }
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    animation: fadeInUp 1s ease-out;
    padding: 0 1.5rem;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    color: var(--text-main);
    line-height: 1.2;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.hero-beian {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.875rem;
    color: var(--text-muted);
    z-index: 10;
    background: rgba(255, 255, 255, 0.5);
    padding: 0.5rem 1rem;
    border-radius: 9999px;
    backdrop-filter: blur(4px);
    white-space: nowrap;
    text-decoration: none;
    transition: all 0.3s;
}

.hero-beian:hover {
    color: var(--primary);
    background: rgba(255, 255, 255, 0.8);
}

/* Sections */
.section {
    padding: 6rem 0;
}

.bg-light {
    background-color: var(--bg-light);
}

.section-title {
    font-size: 2.25rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background-color: var(--primary);
    margin: 1rem auto 0;
    border-radius: 2px;
}

.card {
    background: white;
    border-radius: 1rem;
    padding: 2.5rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    line-height: 1.8;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: white;
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-icon {
    width: 64px;
    height: 64px;
    background: #EEF2FF;
    border-radius: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.feature-icon img {
    width: 32px;
    height: 32px;
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.feature-card ul {
    list-style: none;
    color: var(--text-muted);
}

.feature-card ul li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.5rem;
}

.feature-card ul li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: bold;
}

.value-card {
    background: linear-gradient(135deg, #4F46E5 0%, #4338CA 100%);
    color: white;
    border-radius: 1rem;
    padding: 2.5rem;
    margin-top: 3rem;
    box-shadow: 0 10px 15px -3px rgba(79, 70, 229, 0.3);
}

.value-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

.value-card ul {
    list-style: none;
}

.value-card ul li {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
    position: relative;
}

.value-card ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #A5B4FC;
}

.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-muted);
}

.empty-icon {
    width: 64px;
    height: 64px;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.footer {
    background: #111827;
    color: #9CA3AF;
    padding: 3rem 0;
    text-align: center;
}

/* Responsive */
@media (max-width: 768px) {
    .nav {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 1rem;
        box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
        gap: 1rem;
    }
    
    .nav.show {
        display: flex;
    }

    .mobile-toggle {
        display: block;
    }

    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero-beian {
        width: 90%;
        white-space: normal;
        text-align: center;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.mt-8 { margin-top: 2rem; }