:root {
    --primary-blue: #0F4C81;
    --secondary-blue: #1E3A8A;
    --accent-blue: #3B82F6;
    --text-dark: #333333;
    --text-light: #666666;
    --bg-light: #F8FAFC;
    --white: #FFFFFF;
    --transition: all 0.3s ease;
}

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

body {
    font-family: "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--white);
    scroll-behavior: smooth;
}

a {
    text-decoration: none;
    color: var(--primary-blue);
    transition: var(--transition);
}

ul {
    list-style: none;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

.section-padding {
    padding: 80px 0;
}

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

.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title h2 {
    font-size: 2.2rem;
    color: var(--primary-blue);
    margin-bottom: 10px;
}

.underline {
    width: 60px;
    height: 4px;
    background-color: var(--accent-blue);
    margin: 0 auto;
    border-radius: 2px;
}

.subtitle {
    margin-top: 15px;
    color: var(--text-light);
    font-size: 1.1rem;
}

.navbar {
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

.navbar.scrolled {
    background-color: rgba(255,255,255,0.98);
    backdrop-filter: blur(10px);
}

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

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

.logo a {
    color: var(--primary-blue);
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    color: var(--text-dark);
    font-weight: 500;
    position: relative;
}

.nav-links a:hover {
    color: var(--accent-blue);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent-blue);
    transition: var(--transition);
}

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

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--primary-blue);
    cursor: pointer;
}

.hero {
    height: 100vh;
    min-height: 600px;
    background: linear-gradient(135deg, var(--secondary-blue) 0%, var(--primary-blue) 100%);
    position: relative;
    display: flex;
    align-items: center;
    text-align: center;
    color: var(--white);
    margin-top: 70px;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 20% 80%, rgba(59,130,246,0.3) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(255,255,255,0.1) 0%, transparent 50%);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    animation: fadeInUp 0.8s ease forwards;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

.hero h1 {
    font-size: 4rem;
    margin-bottom: 20px;
    letter-spacing: 2px;
}

.hero h2 {
    font-size: 2rem;
    font-weight: 300;
    margin-bottom: 20px;
    color: rgba(255,255,255,0.9);
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 40px;
    color: rgba(255,255,255,0.8);
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

.scroll-indicator i {
    font-size: 1.5rem;
    color: rgba(255,255,255,0.6);
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 30px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary {
    background-color: var(--white);
    color: var(--primary-blue);
    border: 2px solid var(--white);
}

.btn-primary:hover {
    background-color: transparent;
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(255,255,255,0.3);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 50px;
    align-items: center;
}

.about-text h3 {
    color: var(--secondary-blue);
    margin: 25px 0 15px 0;
    font-size: 1.4rem;
}

.about-text h3:first-child {
    margin-top: 0;
}

.about-text p {
    color: var(--text-light);
    margin-bottom: 15px;
}

.credentials-list {
    margin-top: 20px;
}

.credentials-list li {
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    color: var(--text-dark);
}

.credentials-list i {
    color: var(--accent-blue);
    margin-right: 10px;
    font-size: 1.1rem;
}

.category-filters {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 40px;
}

.filter-btn {
    padding: 10px 24px;
    border: 2px solid var(--primary-blue);
    background-color: transparent;
    color: var(--primary-blue);
    border-radius: 30px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
    background-color: var(--primary-blue);
    color: var(--white);
}

.category-section {
    margin-bottom: 60px;
}

.category-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--bg-light);
}

.category-icon {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.2rem;
}

.category-badge {
    padding: 4px 12px;
    border-radius: 4px;
    color: white;
    font-size: 0.8rem;
    font-weight: 600;
}

.category-header h3 {
    font-size: 1.5rem;
    color: var(--secondary-blue);
}

.category-count {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-left: auto;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 12px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
    text-align: center;
    transition: var(--transition);
    border-top: 4px solid transparent;
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(59,130,246,0.05), transparent);
    transition: 0.5s ease;
}

.card:hover::before {
    left: 100%;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.12);
}

.card-icon {
    width: 70px;
    height: 70px;
    background-color: var(--bg-light);
    color: var(--primary-blue);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.8rem;
    margin: 0 auto 20px auto;
    transition: var(--transition);
    border: 3px solid;
}

.card:hover .card-icon {
    transform: scale(1.1);
}

.card-code {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 4px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.card h3 {
    font-size: 1.4rem;
    color: var(--secondary-blue);
    margin-bottom: 12px;
    min-height: 42px;
}

.card-desc {
    color: var(--text-light);
    margin-bottom: 15px;
    font-size: 0.95rem;
}

.card-meta {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 5px;
    color: var(--text-light);
    font-size: 0.85rem;
}

.meta-item i {
    color: var(--accent-blue);
    font-size: 0.8rem;
}

.card-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-top: 10px;
}

.btn-card {
    flex: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    transition: var(--transition);
    white-space: nowrap;
}

.btn-card i {
    font-size: 0.85rem;
}

.btn-detail {
    background-color: var(--white);
    color: var(--primary-blue);
    border: 1.5px solid var(--primary-blue);
}

.btn-detail:hover {
    background-color: var(--bg-light);
    color: var(--secondary-blue);
    transform: translateY(-2px);
}

.btn-enter {
    background-color: var(--primary-blue);
    color: var(--white);
    border: 1.5px solid var(--primary-blue);
}

.btn-enter:hover {
    background-color: var(--accent-blue);
    border-color: var(--accent-blue);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(59,130,246,0.3);
}

.clients-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    margin-bottom: 30px;
}

.tag {
    padding: 10px 22px;
    background-color: var(--white);
    border: 1px solid #e2e8f0;
    border-radius: 30px;
    color: var(--text-dark);
    font-weight: 500;
    font-size: 0.9rem;
    box-shadow: 0 2px 5px rgba(0,0,0,0.02);
    transition: var(--transition);
    cursor: default;
}

.tag:hover {
    border-color: var(--accent-blue);
    color: var(--primary-blue);
    background-color: var(--bg-light);
    transform: translateY(-2px);
}

.clients-note {
    text-align: center;
    color: #94a3b8;
    font-size: 0.9rem;
}

footer {
    background-color: var(--secondary-blue);
    color: var(--white);
    padding: 60px 0 20px 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    margin-bottom: 40px;
    gap: 30px;
}

.footer-info h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
}

.footer-info p {
    color: rgba(255,255,255,0.7);
}

.footer-contact p {
    margin-bottom: 10px;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
    color: rgba(255,255,255,0.5);
    font-size: 0.9rem;
}

.course-hero {
    background: linear-gradient(135deg, var(--secondary-blue) 0%, var(--primary-blue) 100%);
    color: var(--white);
    padding: 130px 0 60px 0;
    text-align: center;
}

.course-hero .course-icon {
    font-size: 3rem;
    margin-bottom: 15px;
    opacity: 0.9;
}

.course-badge {
    display: inline-block;
    padding: 6px 18px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 15px;
}

.course-hero h1 {
    font-size: 2.4rem;
    margin-bottom: 12px;
}

.course-hero .course-tagline {
    font-size: 1.15rem;
    color: rgba(255,255,255,0.85);
}

.course-body {
    padding: 60px 0;
}

.course-body .container {
    max-width: 900px;
}

.course-block {
    margin-bottom: 45px;
}

.course-block h2 {
    color: var(--primary-blue);
    font-size: 1.5rem;
    margin-bottom: 18px;
    padding-left: 12px;
    border-left: 5px solid var(--accent-blue);
    display: flex;
    align-items: center;
    gap: 10px;
}

.course-block h2 i {
    font-size: 1.2rem;
}

.course-content p {
    color: var(--text-light);
    margin-bottom: 15px;
    font-size: 1.05rem;
    line-height: 1.8;
    text-align: justify;
}

.course-meta-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.course-meta-item {
    background: var(--bg-light);
    border-radius: 10px;
    padding: 22px;
    text-align: center;
    transition: var(--transition);
}

.course-meta-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.08);
}

.course-meta-item i {
    color: var(--accent-blue);
    font-size: 1.6rem;
    margin-bottom: 10px;
}

.course-meta-item .label {
    color: var(--text-light);
    font-size: 0.9rem;
    display: block;
    margin-bottom: 4px;
}

.course-meta-item .value {
    color: var(--secondary-blue);
    font-weight: 600;
    font-size: 1.05rem;
}

.course-list {
    margin-top: 10px;
}

.course-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 12px;
    color: var(--text-dark);
    font-size: 1.05rem;
}

.course-list i {
    color: var(--accent-blue);
    margin-top: 5px;
}

.course-cta {
    text-align: center;
    background: var(--bg-light);
    border-radius: 12px;
    padding: 45px 20px;
    margin-top: 20px;
}

.course-cta h2 {
    border: none;
    padding: 0;
    margin-bottom: 10px;
    justify-content: center;
}

.course-cta .cta-desc {
    color: var(--text-light);
    margin-bottom: 25px;
    font-size: 1.05rem;
}

.course-cta .btn-card {
    flex: none;
    min-width: 160px;
    padding: 14px 28px;
    font-size: 1.05rem;
}

.course-cta .card-actions {
    flex-wrap: wrap;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 30px;
    color: var(--primary-blue);
    font-weight: 500;
    transition: var(--transition);
}

.back-link:hover { 
    color: var(--accent-blue); 
    transform: translateX(-5px);
}

.program-hero {
    min-height: 100vh;
    background: linear-gradient(135deg, var(--secondary-blue) 0%, var(--primary-blue) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    text-align: center;
    padding: 20px;
}

.program-content {
    max-width: 600px;
}

.program-icon {
    width: 100px;
    height: 100px;
    background-color: rgba(255,255,255,0.1);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 3rem;
    margin: 0 auto 25px auto;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(255,255,255,0.4); }
    50% { box-shadow: 0 0 0 20px rgba(255,255,255,0); }
}

.program-content h1 {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.program-content p {
    font-size: 1.1rem;
    color: rgba(255,255,255,0.8);
    margin-bottom: 25px;
}

.program-info {
    margin-bottom: 30px;
}

.info-item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background-color: rgba(255,255,255,0.1);
    padding: 10px 20px;
    border-radius: 8px;
    color: rgba(255,255,255,0.9);
    font-size: 0.95rem;
}

.info-item i {
    color: var(--accent-blue);
}

.program-actions {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
}

.program-actions .btn-card {
    min-width: 180px;
    padding: 14px 28px;
}

.profile-img {
    width: 100%;
    max-width: 400px;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    object-fit: cover;
    display: block;
    margin: 0 auto;
}

.client-category {
    margin-bottom: 35px;
}

.client-category h4 {
    color: var(--secondary-blue);
    margin-bottom: 15px;
    font-size: 1.1rem;
    border-left: 4px solid var(--accent-blue);
    padding-left: 10px;
}

@media (max-width: 992px) {
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .cards-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 3rem;
    }
    
    .hero h2 {
        font-size: 1.5rem;
    }
    
    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: var(--white);
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 5px 20px rgba(0,0,0,0.1);
        display: none;
        z-index: 999;
    }
    
    .nav-links.mobile-active {
        display: flex;
    }
    
    .nav-links a {
        padding: 12px 0;
        border-bottom: 1px solid var(--bg-light);
    }
    
    .nav-links a:last-child {
        border-bottom: none;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .category-header {
        flex-wrap: wrap;
    }
    
    .category-count {
        margin-left: 0;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 2.2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .card-actions {
        flex-direction: column;
    }
    
    .btn-card {
        flex: none;
    }
    
    .course-hero h1 {
        font-size: 1.8rem;
    }
    
    .program-content h1 {
        font-size: 1.8rem;
    }
}