:root {
    --primary: #4361ee;
    --secondary: #3f37c9;
    --accent: #4895ef;
    --light: #f8f9fa;
    --dark: #212529;
    --success: #4cc9f0;
    --warning: #f72585;
    --border-radius: 12px;
    --box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

a {
    color: inherit;    
    text-decoration: none; 
}

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

body {
    font-family: 'Noto Sans SC', 'Poppins', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8fafc;
    overflow-x: hidden;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    box-shadow: 0 4px 15px rgba(67, 97, 238, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(67, 97, 238, 0.6);
}

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

.btn-outline:hover {
    background: var(--primary);
    color: white;
}

.section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 15px;
    color: var(--dark);
    position: relative;
    display: inline-block;
}

.section-title:after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.2rem;
    color: #6c757d;
    max-width: 700px;
    margin: 0 auto;
}

header {
    background-color: white;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 15px 0;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative; 
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo i {
    font-size: 2rem;
    color: var(--primary);
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--dark);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-links a {
    text-decoration: none;
    color: var(--dark);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-links a:after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--primary);
    transition: var(--transition);
    border-radius: 2px;
}

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

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

.auth-buttons {
    display: flex;
    gap: 15px;
}

.btn-login {
    background: white;
    border: 2px solid var(--primary);
    color: var(--primary);
    padding: 8px 20px;
    border-radius: 6px;
    font-weight: 500;
    transition: var(--transition);
}

.btn-login:hover {
    background: var(--primary);
    color: white;
}

.hamburger {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

.hero {
    background: linear-gradient(135deg, #1a2a6c, #3f37c9, #4361ee);
    color: white;
    padding: 180px 0 100px;
    position: relative;
    overflow: hidden;
}

.hero:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="rgba(255,255,255,0.1)" d="M0,224L48,213.3C96,203,192,181,288,181.3C384,181,480,203,576,192C672,181,768,139,864,128C960,117,1056,139,1152,149.3C1248,160,1344,160,1392,160L1440,160L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>') bottom no-repeat;
    background-size: cover;
}

.hero-content {
    max-width: 700px;
    position: relative;
    z-index: 1;
}

.hero h2 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 20px;
}

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

.feature-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 40px 30px;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--box-shadow);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: rgba(67, 97, 238, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
}

.feature-icon i {
    font-size: 2.5rem;
    color: var(--primary);
}

.feature-title {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--dark);
}

.feature-description {
    color: #6c757d;
}

.pricing {
    background: linear-gradient(to bottom, #f0f7ff, #ffffff);
}

.pricing-table {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.pricing-card {
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    position: relative;
    z-index: 1;
}

.pricing-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.pricing-card.popular {
    border: 2px solid var(--primary);
    transform: scale(1.03);
}

.pricing-card.popular:hover {
    transform: scale(1.03) translateY(-10px);
}

.popular-tag {
    position: absolute;
    top: 20px;
    right: -30px;
    background: var(--warning);
    color: white;
    padding: 5px 40px;
    transform: rotate(45deg);
    font-size: 14px;
    font-weight: 600;
    z-index: 2;
}

.pricing-header {
    padding: 30px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    text-align: center;
}

.pricing-name {
    font-size: 1.8rem;
    margin-bottom: 10px;
}

.pricing-price {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 5px;
}

.pricing-period {
    font-size: 1rem;
    opacity: 0.8;
}

.pricing-features {
    padding: 30px;
}

.feature-list {
    list-style: none;
    margin-bottom: 30px;
}

.feature-list li {
    padding: 12px 0;
    border-bottom: 1px solid #eee;
    display: flex;
    align-items: center;
}

.feature-list li:last-child {
    border-bottom: none;
}

.feature-list li i {
    color: var(--success);
    margin-right: 10px;
    font-size: 1.2rem;
}

.pricing-footer {
    padding: 0 30px 30px;
    text-align: center;
}

.faq {
    background: white;
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border-radius: var(--border-radius);
    overflow: hidden;
    margin-bottom: 20px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    border: 1px solid #eee;
}

.faq-question {
    padding: 20px 25px;
    background: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
}

.faq-question:hover {
    background: #f8f9ff;
}

.faq-question i {
    transition: var(--transition);
}

.faq-answer {
    padding: 0 25px;
    max-height: 0;
    overflow: hidden;
    transition: var(--transition);
    background: #f9fafd;
}

.faq-answer p {
    padding: 20px 0;
}

.faq-item.active .faq-question {
    background: #f8f9ff;
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding: 0 25px;
}

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

.news-item {
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.news-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.news-content {
    padding: 25px;
}

.news-date {
    color: var(--accent);
    font-size: 14px;
    margin-bottom: 10px;
    font-weight: 500;
}

.news-title {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: var(--dark);
}

.news-title a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition);
}

.news-title a:hover {
    color: var(--primary);
}

.news-excerpt {
    color: #6c757d;
    margin-bottom: 20px;
}

.news-link {
    display: inline-flex;
    align-items: center;
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
    gap: 8px;
    transition: var(--transition);
}

.news-link:hover {
    gap: 12px;
}

footer {
    background: linear-gradient(135deg, #1a2a6c, #212529);
    color: white;
    padding: 70px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 50px;
}

.footer-column h3 {
    font-size: 1.3rem;
    margin-bottom: 25px;
    position: relative;
    padding-bottom: 10px;
}

.footer-column h3:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
}

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

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: #b0b0b0;
    text-decoration: none;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 10px;
}

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

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

.copyright {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #b0b0b0;
    font-size: 0.9rem;
}

@media (max-width: 992px) {
    .nav-links, .auth-buttons {
        display: none;
    }
    
    .hamburger {
        display: block;
    }
    
    .hero h2 {
        font-size: 2.8rem;
    }
    
    .section {
        padding: 80px 0;
    }
    
    .nav-links.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: white;
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        padding: 20px;
        z-index: 1000;
        gap: 15px;
    }
    
    .auth-buttons.active {
        display: flex;
        position: absolute;
        top: calc(100% + 200px);
        left: 0;
        width: 100%;
        background: white;
        padding: 20px;
        z-index: 1000;
        justify-content: center;
    }
    
    .nav-links.active a {
        padding: 10px 0;
    }
}

@media (max-width: 768px) {
    .hero {
        padding: 150px 0 80px;
    }
    
    .hero h2 {
        font-size: 2.3rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        gap: 15px;
    }
    
    .section-title {
        font-size: 2rem;
    }
}

@media (max-width: 576px) {
    .logo h1 {
        font-size: 1.3rem;
    }
    
    .hero h2 {
        font-size: 2rem;
    }
    
    .pricing-table {
        grid-template-columns: 1fr;
    }
    
    .pricing-card.popular {
        transform: scale(1);
    }
    
    .pricing-card.popular:hover {
        transform: translateY(-10px);
    }
    
    .auth-buttons.active {
        top: calc(100% + 250px);
    }
}

.pricing-card .promo-tag {
    position: absolute;
    top: 10px;
    right: -30px;
    background: #e74c3c;
    color: white;
    padding: 5px 30px;
    font-weight: bold;
    transform: rotate(45deg);
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
    z-index: 10;
    font-size: 14px;
}

.pricing-card.popular .promo-tag {
    top: 40px;
}

.price-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 10px 0;
}

.original-price {
    font-size: 0.9rem;
    text-decoration: line-through;
    color: #999;
}

.pricing-price {
    font-size: 1.8rem;
    font-weight: bold;
    color: #e74c3c;
    margin: 5px 0;
}

.discount-badge {
    background: #e74c3c;
    color: white;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: bold;
    margin-top: 5px;
}

.promo-label {
    background: #f39c12;
    color: white;
    padding: 3px 10px;
    border-radius: 4px;
    font-size: 0.9rem;
    font-weight: bold;
    display: inline-block;
    margin-bottom: 5px;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { opacity: 0.8; }
    50% { opacity: 1; }
    100% { opacity: 0.8; }
}

.pricing-features a[rel="nofollow"] {
    display: inline-block;
    background: #ff5000; 
    color: white !important;
    padding: 12px 30px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: bold;
    font-size: 16px;
    margin-top: 15px;
    transition: all 0.3s ease;
    text-align: center;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.pricing-features a[rel="nofollow"]:hover {
    background: #ff6a00;
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.2);
}

.pricing-features a[rel="nofollow"]:active {
    transform: translateY(0);
}

.pricing-features a[rel="nofollow"] i {
    margin-right: 8px;
}

.pricing-card.popular .pricing-features a[rel="nofollow"] {
    background: linear-gradient(45deg, #ff5000, #ff2a00);
    animation: pulse-glow 1.5s infinite;
}

@keyframes pulse-glow {
    0% { box-shadow: 0 0 0 0 rgba(255, 80, 0, 0.7); }
    70% { box-shadow: 0 0 0 10px rgba(255, 80, 0, 0); }
    100% { box-shadow: 0 0 0 0 rgba(255, 80, 0, 0); }
}

.pricing-features a[rel="nofollow"]::before {
    content: "\f07a";
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    margin-right: 8px;
}

.keyword-highlight {
    font-weight: bold;
    color: #2c3e50;
    background: #e8f4fc;
    padding: 0 4px;
    border-radius: 3px;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px; 
}

section:target {
    animation: highlight 2s ease;
}

@keyframes highlight {
    0% { background-color: transparent; }
    20% { background-color: #f8f9fa; }
    100% { background-color: transparent; }
}

.breadcrumb {
    background: #f8f9fa;
    padding: 10px 0;
    margin-bottom: 20px;
    border-radius: 5px;
    font-size: 14px;
}

.breadcrumb a {
    color: #666;
    text-decoration: none;
}

.breadcrumb a:hover {
    color: #e74c3c;
}

.breadcrumb span {
    color: #333;
    font-weight: bold;
}

.nav-links li a.active {
    color: #e74c3c;
    font-weight: bold;
    border-bottom: 2px solid #e74c3c;
}