/* Website 20 - classic-layout */

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

:root {
    --primary: #FF6B6B;
    --secondary: #4ECDC4;
    --bg: #1A1A2E;
    --white: #ffffff;
    --light: #f8f9fa;
    --dark: #212529;
    --gray: #6c757d;
    --gradient: linear-gradient(135deg, #FF6B6B 0%, #4ECDC4 100%);
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

body.classic-layout {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg);
    color: var(--white);
    line-height: 1.8;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(30px);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    border-bottom: 2px solid var(--primary);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 0;
}

.logo {
    font-size: 1.8rem;
    font-weight: 900;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-decoration: none;
    transition: all 0.3s ease;
}

.logo:hover {
    transform: scale(1.05);
}

nav ul {
    display: flex;
    list-style: none;
    gap: 2.5rem;
    white-space: nowrap;
    margin: 0;
    padding: 0;
    align-items: center;
}

nav a {
    color: var(--white);
    text-decoration: none;
    font-weight: 500;
    padding: 0.6rem 1.2rem;
    border-radius: 10px;
    transition: all 0.3s ease;
    position: relative;
    white-space: nowrap;
    display: inline-block;
}

nav a:hover {
    background: rgba(255, 255, 255, 0.1);
}

main {
    padding-top: 100px;
}

/* 经典网格布局 */
body.classic-layout main { padding-top: 100px; }
body.classic-layout .hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}
body.classic-layout .features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    padding: 4rem 0;
}
body.classic-layout .feature-card {
    background: rgba(255, 255, 255, 0.05);
    padding: 2rem;
    border-radius: 15px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: transform 0.3s ease;
}
body.classic-layout .feature-card:hover {
    transform: translateY(-5px);
}