/* Ntaifitness Minimalist Style - American Market Focused */
:root {
    --primary-blue: #1a365d;
    --accent-orange: #ff6b35;
    --light-gray: #f7fafc;
    --medium-gray: #718096;
    --dark-gray: #2d3748;
    --max-width: 1200px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.7;
    color: var(--dark-gray);
    background-color: #fff;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Header & Navigation */
.navbar {
    background: var(--primary-blue);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff;
    text-decoration: none;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    color: #fff;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-menu a:hover {
    color: var(--accent-orange);
}

/* Hero Section with Video */
.hero-video-section {
    position: relative;
    padding: 60px 0;
    background: var(--light-gray);
}

.video-wrapper {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    height: 0;
    overflow: hidden;
    margin-bottom: 30px;
}

.video-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* Main Content */
.main-content {
    padding: 60px 0;
}

.article-header {
    margin-bottom: 50px;
    padding-bottom: 30px;
    border-bottom: 1px solid #e2e8f0;
}

.article-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary-blue);
    margin-bottom: 15px;
    line-height: 1.2;
}

.article-meta {
    color: var(--medium-gray);
    font-size: 0.95rem;
}

/* Content Body */
.content-body h2 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-blue);
    margin: 40px 0 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--accent-orange);
}

.content-body h3 {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--dark-gray);
    margin: 25px 0 15px;
}

.content-body p {
    margin-bottom: 18px;
    font-size: 1.05rem;
}

/* Exclusive Tip Box */
.exclusive-tip {
    background: linear-gradient(135deg, #1a365d 0%, #2c5282 100%);
    color: #fff;
    padding: 25px;
    margin: 30px 0;
    border-radius: 8px;
    border-left: 5px solid var(--accent-orange);
}

.exclusive-tip h4 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--accent-orange);
}

/* Tables */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin: 30px 0;
    background: #fff;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}

.data-table th {
    background: var(--primary-blue);
    color: #fff;
    padding: 15px;
    text-align: left;
    font-weight: 600;
}

.data-table td {
    padding: 12px 15px;
    border-bottom: 1px solid #e2e8f0;
}

.data-table tr:nth-child(even) {
    background: var(--light-gray);
}

/* Images */
.content-image {
    width: 100%;
    height: auto;
    margin: 30px 0;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.08);
}

/* Internal Links */
.internal-link {
    color: var(--accent-orange);
    font-weight: 600;
    text-decoration: none;
    border-bottom: 2px dotted var(--accent-orange);
    transition: all 0.3s;
}

.internal-link:hover {
    background-color: var(--accent-orange);
    color: #fff;
}

/* FAQ Section */
.faq-section {
    background: var(--light-gray);
    padding: 50px 0;
    margin-top: 60px;
}

.faq-item {
    background: #fff;
    margin-bottom: 20px;
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.faq-item h3 {
    font-size: 1.2rem;
    color: var(--primary-blue);
    margin-bottom: 15px;
}

/* Google Map */
.map-section {
    padding: 50px 0;
    background: var(--primary-blue);
    color: #fff;
}

.map-wrapper {
    position: relative;
    padding-bottom: 40%;
    height: 0;
    overflow: hidden;
    border-radius: 8px;
    margin-top: 30px;
}

.map-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* Footer */
.footer {
    background: var(--dark-gray);
    color: #fff;
    padding: 60px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    color: var(--accent-orange);
}

.footer-section p, .footer-section a {
    color: #cbd5e0;
    text-decoration: none;
    line-height: 1.8;
}

.footer-section a:hover {
    color: var(--accent-orange);
}

.social-links {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-top: 15px;
}

.social-links a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: rgba(255,107,53,0.1);
    border-radius: 4px;
    transition: all 0.3s;
}

.social-links a:hover {
    background: var(--accent-orange);
    color: #fff;
}

.footer-bottom {
    border-top: 1px solid #4a5568;
    padding-top: 30px;
    text-align: center;
    color: #a0aec0;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-menu {
        flex-direction: column;
        gap: 1rem;
    }
    
    .article-title {
        font-size: 2rem;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
}


.dropdown {
    position: relative;
}

.dropdown-toggle {
    display: block;
    position: relative;
    padding-right: 20px; 
}

.dropdown-toggle::after {
    content: "▼";
    font-size: 0.7rem;
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    margin-left: 5px;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--primary-blue);
    min-width: 200px;
    list-style: none;
    padding: 10px 0;
    margin: 0;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    border-radius: 4px;
    display: none; /* 默认隐藏 */
    z-index: 1000;
}

.dropdown-menu li {
    margin: 0;
}

.dropdown-menu a {
    display: block;
    padding: 8px 15px;
    color: #fff;
    text-decoration: none;
    transition: background-color 0.3s;
}

.dropdown-menu a:hover {
    background-color: rgba(255,255,255,0.1);
    color: var(--accent-orange);
}

.dropdown:hover .dropdown-menu {
    display: block;
}
@media (max-width: 768px) {
    .nav-menu {
        flex-direction: column;
        gap: 1rem;
    }
    
    .dropdown {
        position: static;
    }
    
    .dropdown-menu {
        position: static;
        display: none; 
        margin-left: 15px;
        background-color: rgba(255,255,255,0.1);
    }
    

    .dropdown.active .dropdown-menu {
        display: block;
    }
    
    .article-title {
        font-size: 2rem;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
}