* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif; background: #f8fafc; color: #1e293b; line-height: 1.6; }
.container { max-width: 1280px; margin: 0 auto; padding: 0 2rem; }

nav {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

nav.scrolled { box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08); }

.nav-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo-img {
    height: 72px;
    width: auto;
}

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

.nav-links a {
    text-decoration: none;
    color: #4b5563;
    font-weight: 500;
    font-size: 1rem;
    transition: all 0.3s;
    position: relative;
    padding: 0.5rem 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, #1e3a8a, #3b82f6);
    transition: width 0.3s ease;
}

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

.nav-links a:hover {
    color: #1e3a8a;
}

.nav-links a.active {
    color: #1e3a8a;
}

.nav-links .contact-btn {
    background: linear-gradient(135deg, #1e3a8a, #3b82f6);
    color: white !important;
    padding: 0.5rem 1.5rem;
    border-radius: 30px;
    font-weight: 500;
    box-shadow: 0 2px 8px rgba(30, 58, 138, 0.2);
    transition: all 0.3s;
}

.nav-links .contact-btn::after {
    display: none;
}

.nav-links .contact-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(30, 58, 138, 0.3);
    color: white !important;
}

.nav-links .contact-btn.active {
    background: linear-gradient(135deg, #f97316, #ef4444);
    box-shadow: 0 2px 8px rgba(249, 115, 22, 0.3);
}

.menu-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    background: none;
    border: none;
    color: #1e3a8a;
    padding: 0.5rem;
}

.page-header {
    background: linear-gradient(135deg, #1e3a8a, #3b82f6);
    color: white;
    padding: 3rem 0;
    text-align: center;
}

.page-header h1 { font-size: 2.5rem; margin-bottom: 0.5rem; }
.page-header p { opacity: 0.9; }

.breadcrumb { padding: 1rem 0; color: #64748b; }
.breadcrumb a { color: #1e3a8a; text-decoration: none; }

.footer {
    background: #0f172a;
    color: #94a3b8;
    text-align: center;
    padding: 3rem 0;
    margin-top: 3rem;
}

.footer a { color: #94a3b8; text-decoration: none; transition: color 0.3s; }
.footer a:hover { color: #f97316; }
.footer .social-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}
.footer .social-links a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.footer .social-links a:hover { background: #f97316; transform: translateY(-3px); }

.content-wrapper { min-height: 400px; }

@media (max-width: 768px) {
    .container { padding: 0 1rem; }
    .menu-toggle { display: block; }
    .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 1.5rem;
        gap: 1rem;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
        border-radius: 0 0 1rem 1rem;
    }
    .nav-links.show { display: flex; }
    .nav-links a { width: 100%; text-align: center; padding: 0.75rem; }
    .nav-links a::after { display: none; }
    .nav-links .contact-btn { text-align: center; margin-top: 0.5rem; }
    .page-header h1 { font-size: 1.8rem; }
    .logo-img { height: 35px; }
}

::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #f1f5f9; }
::-webkit-scrollbar-thumb { background: #3b82f6; border-radius: 4px; }