/* ===== Reset & Base ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", sans-serif;
    color: #333;
    line-height: 1.6;
    background: #fff;
}
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; height: auto; }

/* ===== Header ===== */
header {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    position: sticky;
    top: 0;
    z-index: 1000;
}
.nav-wrap {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}
.logo img { height: 48px; }
nav ul { display: flex; list-style: none; gap: 32px; }
nav a {
    font-size: 15px;
    color: #444;
    font-weight: 500;
    transition: color 0.3s;
    position: relative;
    padding: 4px 0;
}
nav a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: #1a5276;
    transition: width 0.3s;
}
nav a:hover::after, nav a.active::after { width: 100%; }
nav a:hover, nav a.active { color: #1a5276; }

/* Mobile Menu */
.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 26px;
    height: 19px;
    cursor: pointer;
    background: none;
    border: none;
    padding: 0;
}
.menu-toggle span {
    display: block;
    width: 100%;
    height: 3px;
    background: #333;
    border-radius: 2px;
    transition: 0.3s;
}

/* ===== Banner ===== */
.banner-section { position: relative; overflow: hidden; }
.banner-container {
    width: 100%;
    height: 520px;
    position: relative;
}
.banner-track {
    display: flex;
    width: 300%;
    height: 100%;
    transition: transform 0.6s ease-in-out;
}
.banner-slide {
    width: 33.333%;
    position: relative;
    overflow: hidden;
}
.banner-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.banner-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to right, rgba(26,82,118,0.7) 0%, transparent 70%);
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding-left: 80px;
    color: #fff;
}
.banner-overlay h1 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 12px;
    text-shadow: 0 2px 8px rgba(0,0,0,0.3);
}
.banner-overlay p {
    font-size: 18px;
    opacity: 0.9;
}
.banner-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255,255,255,0.25);
    border: none;
    color: #fff;
    font-size: 28px;
    width: 48px;
    height: 48px;
    cursor: pointer;
    border-radius: 50%;
    transition: background 0.3s;
    z-index: 2;
}
.banner-btn:hover { background: rgba(255,255,255,0.5); }
.banner-btn.prev { left: 20px; }
.banner-btn.next { right: 20px; }
.banner-dots {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 2;
}
.banner-dots .dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255,255,255,0.5);
    cursor: pointer;
    transition: 0.3s;
}
.banner-dots .dot.active { background: #fff; transform: scale(1.2); }

/* ===== Section Title ===== */
.section-title {
    text-align: center;
    margin-bottom: 50px;
    padding: 0 10px;
}
.section-title h2 {
    font-size: 32px;
    color: #1a1a1a;
    margin-bottom: 10px;
    position: relative;
    display: inline-block;
}
.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: #1a5276;
    border-radius: 2px;
}
.section-title p {
    color: #666;
    font-size: 15px;
    margin-top: 16px;
}

/* ===== Products ===== */
.products-section { padding: 80px 0; background: #f8f9fa; }
.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.product-card {
    background: #fff;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    transition: transform 0.3s, box-shadow 0.3s;
    cursor: pointer;
}
.product-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 30px rgba(0,0,0,0.12);
}
.product-img {
    width: 100%;
    height: 200px;
    overflow: hidden;
}
.product-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s;
}
.product-card:hover .product-img img { transform: scale(1.08); }
.product-body { padding: 16px; text-align: center; }
.product-body h3 {
    font-size: 16px;
    color: #1a1a1a;
    margin-bottom: 6px;
}
.product-body p {
    font-size: 13px;
    color: #666;
    line-height: 1.5;
}

/* ===== Video ===== */
.video-section { padding: 80px 0; }
.video-container { max-width: 900px; margin: 0 auto; }
.video-box {
    position: relative;
    width: 100%;
    padding-top: 56.25%;
    background: #1a1a1a;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 8px 30px rgba(0,0,0,0.15);
}
.video-box video {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* ===== About ===== */
.about-section { padding: 80px 0; background: #fff; }
.about-content {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 50px;
    align-items: start;
}
.about-text h3 {
    font-size: 22px;
    color: #1a5276;
    margin-bottom: 20px;
    border-left: 4px solid #1a5276;
    padding-left: 12px;
}
.about-text p {
    line-height: 1.9;
    color: #444;
    margin-bottom: 14px;
    font-size: 14.5px;
    text-align: justify;
}
.about-img img {
    width: 100%;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

/* ===== Contact ===== */
.contact-section { padding: 80px 0; background: #f0f4f8; }
.contact-wrap {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}
.contact-info h3 {
    font-size: 20px;
    color: #1a5276;
    margin-bottom: 20px;
}
.contact-info p {
    margin-bottom: 12px;
    line-height: 1.7;
    color: #444;
    font-size: 15px;
}
.address-box {
    margin-top: 25px;
    padding-top: 20px;
    border-top: 1px dashed #ccc;
}
.whatsapp-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: #25D366;
    color: #fff;
    padding: 10px 20px;
    border-radius: 30px;
    margin-top: 14px;
    font-weight: 600;
    transition: 0.3s;
}
.whatsapp-link:hover { background: #128C7E; transform: scale(1.02); }
.whatsapp-link svg { width: 20px; height: 20px; fill: #fff; }

.contact-form-box form {
    display: flex;
    flex-direction: column;
    gap: 14px;
}
.contact-form-box input,
.contact-form-box textarea {
    padding: 13px 15px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 14px;
    outline: none;
    transition: border-color 0.3s;
    font-family: inherit;
}
.contact-form-box input:focus,
.contact-form-box textarea:focus { border-color: #1a5276; }
.contact-form-box textarea { height: 120px; resize: none; }
.btn-submit {
    padding: 14px;
    background: #1a5276;
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s;
}
.btn-submit:hover { background: #154160; }
.form-status {
    text-align: center;
    padding: 10px;
    border-radius: 6px;
    margin-top: 10px;
    font-size: 14px;
}
.form-status.success { background: #d4edda; color: #155724; }
.form-status.error { background: #f8d7da; color: #721c24; }

/* ===== Footer ===== */
footer {
    background: #1a2744;
    color: #ccc;
    padding: 50px 0;
}
.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 30px;
}
.footer-left p { margin: 5px 0; font-size: 14px; }
.footer-qr { display: flex; gap: 25px; }
.qr-item { text-align: center; }
.qr-item img {
    width: 90px;
    height: 90px;
    border-radius: 6px;
    border: 2px solid rgba(255,255,255,0.15);
    background: #fff;
    display: block;
    margin-bottom: 6px;
    transition: 0.3s;
}
.qr-item img:hover { border-color: #fff; transform: translateY(-3px); }
.qr-item span { font-size: 12px; color: #9fb3cc; }

/* ===== Back to Top ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 46px;
    height: 46px;
    background: #1a5276;
    color: #fff;
    border: none;
    border-radius: 50%;
    font-size: 20px;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: 0.3s;
    z-index: 999;
    box-shadow: 0 3px 10px rgba(0,0,0,0.2);
}
.back-to-top.show { opacity: 1; visibility: visible; }
.back-to-top:hover { background: #154160; transform: scale(1.1); }


/* ===== Language Toggle Button ===== */
.lang-toggle {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 9999;
    padding: 6px 14px;
    background: rgba(26, 82, 118, 0.9);
    color: #fff;
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    backdrop-filter: blur(4px);
}
.lang-toggle:hover {
    background: #1a5276;
    transform: scale(1.05);
}

@media (max-width: 768px) {
    .lang-toggle {
        top: 75px;
        right: 10px;
        padding: 4px 10px;
        font-size: 12px;
    }
}

/* ===== Responsive ===== */
@media (max-width: 992px) {
    .products-grid { grid-template-columns: repeat(2, 1fr); gap: 18px; }
    .about-content, .contact-wrap { grid-template-columns: 1fr; gap: 30px; }
    .banner-container { height: 380px; }
    .banner-overlay h1 { font-size: 30px; }
    .banner-overlay { padding-left: 40px; }
}
@media (max-width: 768px) {
    .menu-toggle { display: flex; }
    nav ul {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #fff;
        box-shadow: 0 4px 10px rgba(0,0,0,0.1);
        padding: 20px;
        gap: 14px;
    }
    nav ul.active { display: flex; }
    .menu-toggle.open span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
    .menu-toggle.open span:nth-child(2) { opacity: 0; }
    .menu-toggle.open span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }
    .products-grid { grid-template-columns: 1fr; }
    .banner-container { height: 260px; }
    .banner-overlay h1 { font-size: 22px; }
    .banner-overlay p { font-size: 14px; }
    .banner-overlay { padding-left: 20px; }
    .footer-content { justify-content: center; text-align: center; flex-direction: column; }
    .section-title h2 { font-size: 24px; }
}