:root {
    --zd-blue: #006fb9;
    --zd-blue-dark: #005a93;
    --zd-blue-light: #146ba2;
    --zd-green: #80a716;
    --zd-green-dark: #6a8f12;
    --zd-text: #232323;
    --zd-text-2: #666666;
    --zd-bg-light: #f0f0f0;
    --zd-footer-bg: #4a4a4a;
    --zd-footer-bg-2: #393939;
    --zd-line: #cccccc;
}

html { scroll-behavior: smooth; }
body {
    color: var(--zd-text);
    line-height: 1.6;
}
/* ============ Section Title ============ */
.section-title {
    text-align: center;
    margin-bottom: 32px;
}
.section-title h2 {
    font-size: 32px;
    font-weight: 700;
    color: var(--zd-text);
    margin-bottom: 12px;
    display: inline-block;
    position: relative;
}
.section-title h2.blue { color: var(--zd-blue); }
.section-title h2.dark-blue { color: var(--zd-blue-light); }
.section-title .title-bar {
    width: 80px;
    height: 3px;
    background: var(--zd-line);
    margin: 12px auto 16px;
    border-radius: 2px;
}
.section-title .intro {
    font-size: 18px;
    color: var(--zd-text-2);
    max-width: 1100px;
    margin: 0 auto;
    line-height: 1.7;
}
/* ============ Applications Tabs ============ */
.app-section { padding: 50px 0; background: #fafafa; }
.app-content {
    background: #fff;
    padding: 36px 32px;
    border-radius: 0 0 4px 4px;
    display: none;
}
.app-content.active { display: block; }
.app-content h3 {
    font-size: 26px;
    font-weight: 700;
    color: var(--zd-text);
    margin-bottom: 18px;
}
.app-content p {
    font-size: 18px;
    color: var(--zd-text-2);
    line-height: 1.7;
    margin-bottom: 16px;
}
.app-content p strong { color: var(--zd-text); }

.app-content img.full-img {
    max-width: 100%;
    margin:30px auto ;
    display: block;
}
.app-content ul.app-list {
    list-style: none;
    padding: 0;
    margin: 0 0 24px;
    font-size: 18px;
    color: var(--zd-text-2);
}
.app-content ul.app-list li {
    padding: 6px 0;
    border-bottom: 1px dashed #e0e0e0;
}
.app-content ul.app-list li strong { color: var(--zd-text); margin-right: 6px; }
.app-content ul.app-list li a { color: var(--zd-blue); text-decoration: none; }
.app-content ul.app-list li a:hover { text-decoration: underline; }

/* ============ Main Products ============ */
.products-section { padding: 50px 0; background: #fff; }
.product-card {
    background: #fff;
    border: 1px solid #eee;
    border-radius: 8px;
    overflow: hidden;
    transition: all 0.3s ease;
    text-align: center;
    margin-bottom: 24px;
    height: 100%;
}
.product-card:hover {
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transform: translateY(-4px);
    border-color: var(--zd-blue);
}
.product-card .p-thumb {
    background: linear-gradient(135deg, #f0f4f8 0%, #d9e2ec 100%);
    height: 180px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 64px;
    color: var(--zd-blue);
}
.product-card .p-name {
    padding: 16px;
    font-size: 18px;
    font-weight: 600;
    color: var(--zd-text);
    border-top: 1px solid #eee;
}

/* ============ Flow Chart ============ */
.flow-section { padding: 50px 0; background: #fff; }
.flow-chart-img {
    background: #f8f9fa;
    padding: 30px;
    border-radius: 12px;
    text-align: center;
}
.flow-chart-img svg { max-width: 100%; height: auto; }

/* ============ Cases ============ */
.cases-section { padding: 50px 0; background: #fafafa; }
.case-card {
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 14px rgba(0,0,0,0.05);
    transition: all 0.3s;
    height: 100%;
    margin-bottom: 24px;
}
.case-card:hover {
    box-shadow: 0 12px 30px rgba(0,0,0,0.12);
    transform: translateY(-4px);
}
.case-card img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    display: block;
}
.case-card .case-body { padding: 20px; }
.case-card h5 {
    font-size: 20px;
    font-weight: 700;
    color: #262626;
    margin-bottom: 10px;
}
.case-card p {
    font-size: 16px;
    color: var(--zd-text-2);
    margin: 0;
    line-height: 1.5;
}

/* ============ Support / Service ============ */
.service-section { padding: 50px 0; background: #fff; }
.service-card {
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 14px rgba(0,0,0,0.05);
    transition: all 0.3s;
    height: 100%;
    margin-bottom: 24px;
    text-align: center;
    padding-bottom: 24px;
}
.service-card:hover {
    box-shadow: 0 12px 30px rgba(0,0,0,0.12);
    transform: translateY(-4px);
}
.service-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}
.service-card h6 {
    font-size: 18px;
    font-weight: 700;
    color: #121212;
    margin: 18px 16px 10px;
}
.service-card p {
    font-size: 16px;
    color: var(--zd-text-2);
    padding: 0 20px;
    margin: 0;
    line-height: 1.5;
}


/* ============ FAQ ============ */
.faq-section { padding: 50px 0 60px; background: #fff; }
.faq-box {
    background: var(--zd-bg-light);
    padding: 16px;
    border-radius: 6px;
}
.faq-box .faq-q {
    background: var(--zd-blue);
    color: #fff;
    font-size: 18px;
    font-weight: 600;
    padding: 10px 14px;
    border-radius: 4px;
    margin-bottom: 14px;
}
.faq-box .faq-q i { margin-right: 8px; }
.faq-box ul, .faq-box p {
    font-size: 15px;
    line-height: 25px;
    color: var(--zd-text-2);
}
.faq-box ul {
    list-style: disc;
    padding-left: 22px;
}
.faq-cta {
    text-align: center;
    margin-top: 50px;
    clear: both;
}
.faq-cta a {
    background: var(--zd-blue);
    color: #fff;
    padding: 12px 32px;
    border-radius: 30px;
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
}