/*
 * layout.css
 * 包含主要布局结构：导航栏、Hero区域和页脚
 */

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1rem 0;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow);
}

.navbar-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

.navbar-brand {
    flex-shrink: 0;
}

.navbar-logo {
    height: 50px;
    width: auto;
}

.navbar-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
    margin-left: auto;
}

.navbar-nav {
    display: flex;
    list-style: none;
    gap: 3rem;
    align-items: center;
}

.nav-link {
    color: var(--dark);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    padding: 0.5rem 0;
}

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

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

/* Hero Section */
.hero {
    padding: 8rem 0 4rem;
    background: linear-gradient(135deg, var(--dark) 0%, var(--darker) 100%);
    color: var(--light);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 20% 25%, rgba(239, 68, 68, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 75% 75%, rgba(249, 115, 22, 0.15) 0%, transparent 50%);
    pointer-events: none;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

.hero-title .highlight {
    display: block;
    color: var(--primary);
}

.hero-text {
    color: var(--text-secondary);
    font-size: 1.125rem;
    margin-bottom: 2rem;
    max-width: 600px;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

.hero-visual {
    position: relative;
    height: 500px;
    width: 100%;
}

.visual-card {
    position: absolute;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    padding: 1rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
}

.card-1 {
    top: 0;
    right: 0;
    width: 60%;
    z-index: 2;
}

.card-2 {
    bottom: 15%;
    left: 0;
    width: 60%;
    z-index: 1;
}

/* Footer */
.footer {
    background: var(--darker);
    padding: 6rem 0 2rem;
    color: var(--light);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-info {
    max-width: 400px;
}

.footer-logo {
    height: 40px;
    width: auto;
    filter: brightness(0) invert(1);
    margin-bottom: 1rem;
}

.footer-info p {
    color: var(--text-secondary);
}

.footer-links h3 {
    font-size: 1.125rem;
    margin-bottom: 1.5rem;
    color: var(--light);
    font-weight: 600;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a,
.footer-links-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary);
    transform: translateX(5px);
}

.footer-links i {
    color: var(--primary);
    font-size: 1.125rem;
    margin-top: 0.25rem;
    flex-shrink: 0;
}

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid rgba(148, 163, 184, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-secondary);
}

.powered-by a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition);
}

.powered-by a:hover {
    color: var(--primary-dark);
}