:root {
    --primary-color: #FF0000; /* Đỏ - Năng lượng, may mắn */
    --secondary-color: #000080; /* Xanh đậm - Chuyên nghiệp, tin cậy */
    --text-dark: #333333;
    --text-light: #ffffff;
    --background-light: #f4f7f6;
    --background-grey: #e9ecef;
    --border-color: #e0e0e0;
}

/* Chung cho trang Hỗ Trợ */
.page-support {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
}

.page-support .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.page-support h1,
.page-support h2,
.page-support h3 {
    color: var(--secondary-color);
    text-align: center;
    margin-bottom: 20px;
    font-weight: bold;
}

.page-support h1 {
    font-size: 3.2em;
    margin-top: 0;
    color: var(--text-light);
}

.page-support h2 {
    font-size: 2.5em;
    margin-top: 60px;
    margin-bottom: 30px;
}

.page-support h3 {
    font-size: 1.8em;
    margin-bottom: 15px;
}

.page-support p {
    text-align: center;
    margin-bottom: 20px;
    font-size: 1.1em;
}

.page-support section {
    padding: 60px 0;
    background-color: var(--background-light);
}

.page-support section:nth-of-type(even) {
    background-color: #ffffff;
}

.page-support .button {
    display: inline-block;
    padding: 12px 25px;
    background-color: var(--primary-color);
    color: var(--text-light);
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
    transition: background-color 0.3s ease, transform 0.3s ease;
    margin-top: 15px;
    border: none;
    cursor: pointer;
    font-size: 1em;
}

.page-support .button:hover {
    background-color: darken(var(--primary-color), 10%);
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

/* Hero Section */
.page-support .hero-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--text-light);
    padding: 100px 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.page-support .hero-container {
    max-width: 900px;
}

.page-support .hero-content p {
    font-size: 1.2em;
    margin-bottom: 30px;
    color: var(--text-light);
}

.page-support .cta-button {
    display: inline-block;
    padding: 15px 40px;
    background: var(--text-light);
    color: var(--primary-color);
    text-decoration: none;
    border-radius: 50px;
    font-size: 1.2em;
    font-weight: bold;
    margin-top: 30px;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.page-support .cta-button:hover {
    background: var(--background-grey);
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
}

/* Quick Guides Section */
.page-support .section-quick-guides p {
    max-width: 800px;
    margin: 0 auto 40px auto;
}

.page-support .guide-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.page-support .guide-card {
    background: #ffffff;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    padding: 30px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.page-support .guide-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.page-support .guide-card .card-image {
    width: 100%;
    max-width: 400px;
    height: 250px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 20px;
}

.page-support .guide-card h3 {
    color: var(--primary-color);
    font-size: 1.6em;
    margin-bottom: 15px;
    text-align: center;
}

.page-support .guide-card h3 a {
    color: var(--primary-color);
    text-decoration: none;
}

.page-support .guide-card h3 a:hover {
    text-decoration: underline;
}

.page-support .guide-card p {
    font-size: 1em;
    color: var(--text-dark);
    text-align: left;
    margin-bottom: 15px;
}

.page-support .guide-card ol, .page-support .guide-card ul {
    text-align: left;
    margin: 0 0 20px 20px;
    padding: 0;
    color: var(--text-dark);
}

.page-support .guide-card li {
    margin-bottom: 8px;
}

/* FAQ Section */
.page-support .section-faq p {
    max-width: 800px;
    margin: 0 auto 40px auto;
}

.page-support .faq-list {
    max-width: 900px;
    margin: 40px auto;
}

.page-support .faq-item {
    margin-bottom: 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    background-color: #ffffff;
}

.page-support .faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 25px;
    background: #f9f9f9;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.page-support .faq-question:hover {
    background: var(--background-grey);
}

.page-support .faq-question h3 {
    margin: 0;
    font-size: 1.25em;
    color: var(--secondary-color);
    text-align: left;
}

.page-support .faq-toggle {
    font-size: 1.8em;
    font-weight: bold;
    color: var(--primary-color);
    transition: transform 0.3s ease;
}

.page-support .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease-out, padding 0.4s ease-out;
    padding: 0 25px;
    background: #ffffff;
}

.page-support .faq-answer p {
    padding: 15px 0;
    margin: 0;
    text-align: left;
    font-size: 1em;
    color: var(--text-dark);
}

.page-support .faq-item.active .faq-answer {
    max-height: 500px; /* Đủ lớn để chứa nội dung */
    padding: 15px 25px;
}

.page-support .faq-item.active .faq-toggle {
    transform: rotate(45deg);
}

/* Contact Section */
.page-support .section-contact p {
    max-width: 800px;
    margin: 0 auto 40px auto;
}

.page-support .contact-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 40px;
    text-align: center;
}

.page-support .contact-method-card {
    background: #ffffff;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    padding: 30px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.page-support .contact-method-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.page-support .contact-method-card .contact-icon {
    width: 80px;
    height: 80px;
    margin-bottom: 20px;
    object-fit: contain;
}

.page-support .contact-method-card h3 {
    font-size: 1.6em;
    color: var(--secondary-color);
    margin-bottom: 10px;
}

.page-support .contact-method-card p {
    font-size: 1em;
    color: var(--text-dark);
    margin-bottom: 20px;
}

/* Security Section */
.page-support .section-security p {
    max-width: 800px;
    margin: 0 auto 40px auto;
}

.page-support .security-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 40px;
    text-align: center;
}

.page-support .security-item {
    background: #ffffff;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    padding: 30px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.page-support .security-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
}

.page-support .security-item .feature-icon {
    width: 100px;
    height: 100px;
    margin-bottom: 20px;
    object-fit: contain;
}

.page-support .security-item h3 {
    font-size: 1.5em;
    color: var(--secondary-color);
    margin-bottom: 10px;
}

.page-support .security-item p {
    font-size: 1em;
    color: var(--text-dark);
}

.page-support .security-cta {
    margin-top: 40px;
    font-size: 1.1em;
}

.page-support .security-cta a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: bold;
}

.page-support .security-cta a:hover {
    text-decoration: underline;
}

/* Terms Section */
.page-support .section-terms p {
    max-width: 800px;
    margin: 0 auto 40px auto;
}

.page-support .terms-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 30px;
}

/* Feedback Section */
.page-support .section-feedback p {
    max-width: 800px;
    margin: 0 auto 40px auto;
}

/* Responsive Design */
@media (max-width: 992px) {
    .page-support h1 {
        font-size: 2.8em;
    }
    .page-support h2 {
        font-size: 2em;
    }
    .page-support h3 {
        font-size: 1.5em;
    }
    .page-support p {
        font-size: 1em;
    }
    .page-support .hero-section {
        padding: 80px 15px;
    }
    .page-support .cta-button {
        padding: 12px 30px;
        font-size: 1.1em;
    }
    .page-support .guide-cards, .page-support .contact-methods, .page-support .security-features {
        grid-template-columns: 1fr;
    }
    .page-support .terms-links {
        flex-direction: column;
        align-items: center;
    }
    .page-support .button {
        width: fit-content;
        min-width: 200px;
    }
}

@media (max-width: 768px) {
    .page-support h1 {
        font-size: 2.2em;
    }
    .page-support h2 {
        font-size: 1.8em;
    }
    .page-support h3 {
        font-size: 1.3em;
    }
    .page-support section {
        padding: 40px 0;
    }
    .page-support .hero-section {
        padding: 60px 15px;
    }
    .page-support .faq-question {
        padding: 15px 20px;
    }
    .page-support .faq-question h3 {
        font-size: 1.1em;
    }
    .page-support .faq-toggle {
        font-size: 1.5em;
    }
    .page-support .faq-answer {
        padding: 0 20px;
    }
    .page-support .faq-answer p {
        padding: 10px 0;
    }
    .page-support .faq-item.active .faq-answer {
        padding: 10px 20px;
    }
    .page-support .guide-card, .page-support .contact-method-card, .page-support .security-item {
        padding: 20px;
    }
    .page-support .guide-card .card-image {
        height: 200px;
    }
}

@media (max-width: 480px) {
    .page-support h1 {
        font-size: 1.8em;
    }
    .page-support h2 {
        font-size: 1.5em;
    }
    .page-support .cta-button {
        font-size: 1em;
        padding: 10px 25px;
    }
    .page-support .guide-card h3 {
        font-size: 1.4em;
    }
    .page-support .contact-method-card h3,
    .page-support .security-item h3 {
        font-size: 1.3em;
    }
}