/* 导航栏样式 - 从 index.html 提取 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(22, 28, 48, 0.85);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    border-bottom: 1px solid var(--glass-border);
    padding: 12px 16px;
    z-index: 100;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(22, 28, 48, 0.95);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
}

.navbar-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    font-size: clamp(18px, 5vw, 24px);
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: flex;
    align-items: center;
    gap: 6px;
    text-decoration: none;
    white-space: nowrap;
    transition: all 0.3s ease;
}

.logo:hover {
    filter: brightness(1.2);
    transform: translateY(-1px);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 20px;
}

.public-links {
    display: flex;
    align-items: center;
    gap: 16px;
}

.nav-link {
    color: #c5d1ed;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
    padding: 6px 0;
    font-size: 14px;
    white-space: nowrap;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--ai-accent);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav-link:hover {
    color: #fff;
}

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

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

.btn {
    padding: 8px 20px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: none;
    white-space: nowrap;
}

.btn-glass {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: #fff;
}

.btn-glass:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
    position: relative;
    overflow: hidden;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

.btn-primary::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: 0.5s;
}

.btn-primary:hover::after {
    left: 100%;
}

/* 移动端适配 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        /* 暂时隐藏移动端菜单，后续可添加汉堡菜单 */
    }

    .navbar {
        padding: 10px 16px;
    }

    .logo {
        font-size: 20px;
    }
}
/* Footer 样式 - 从 index.html 提取 */
.footer {
    position: relative;
    padding: 2rem 2rem 1.5rem;
    text-align: center;
    border-top: 1px solid var(--glass-border);
    z-index: 1;
    background: var(--glass-bg-light);
    backdrop-filter: blur(var(--blur-sm));
    -webkit-backdrop-filter: blur(var(--blur-sm));
    margin-top: auto; /* 确保在 flex 布局中推到底部 */
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    font-size: 0.9rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s;
}

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

.footer-bottom {
    color: var(--text-muted);
    font-size: 0.9rem;
}