:root {
    --brand-orange: #ff5722;
    --brand-orange-hover: #f44336;
    --text-main: #111111;
    --text-secondary: #555555;
    --card-bg: #f8f9fa;
    --border-light: #e5e5e5;
    --banner-bg: #f5f5f5;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    color: var(--text-main);
    background-color: #ffffff;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

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

/* --- Header & Navigation --- */
.site-header {
    background-color: #ffffff;
    border-bottom: 1px solid #f0f0f0;
    position: sticky;
    top: 0;
    z-index: 1030;
}

.navbar {
    padding: 18px 0;
}

.navbar-brand {
    font-size: 1.05rem;
    font-weight: 800;
    letter-spacing: 0.04em;
    color: #000000 !important;
    text-transform: uppercase;
}

.navbar-nav .nav-link {
    font-size: 0.92rem;
    font-weight: 500;
    color: #2b2b2b !important;
    padding: 6px 14px !important;
    position: relative;
    transition: color 0.2s ease;
}

.navbar-nav .nav-link:hover {
    color: var(--brand-orange) !important;
}

.navbar-nav .nav-link.active {
    color: var(--brand-orange) !important;
    font-weight: 600;
}

.navbar-nav .nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 14px;
    right: 14px;
    height: 2px;
    background-color: var(--brand-orange);
    border-radius: 2px;
}

.search-btn {
    background: none;
    border: none;
    padding: 6px;
    color: #111111;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: color 0.2s ease;
}

.search-btn:hover {
    color: var(--brand-orange);
}

/* --- Hero Section --- */
.hero-section {
    padding: 60px 0 45px 0;
    background-color: #ffffff;
}

.hero-title {
    font-size: clamp(2.4rem, 4.2vw, 3.6rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.15;
    color: #000000;
    margin-bottom: 20px;
}

.hero-desc {
    font-size: 1.12rem;
    color: #4f4f4f;
    max-width: 440px;
    line-height: 1.55;
    margin-bottom: 34px;
    font-weight: 400;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}

.btn-brand-solid {
    background-color: var(--brand-orange);
    color: #ffffff !important;
    font-weight: 600;
    font-size: 0.95rem;
    padding: 12px 28px;
    border-radius: 6px;
    border: 1px solid var(--brand-orange);
    transition: all 0.2s ease;
}

.btn-brand-solid:hover {
    background-color: var(--brand-orange-hover);
    border-color: var(--brand-orange-hover);
    transform: translateY(-1px);
}

.btn-outline-dark-custom {
    background-color: #ffffff;
    color: #1a1a1a !important;
    font-weight: 500;
    font-size: 0.95rem;
    padding: 12px 26px;
    border-radius: 6px;
    border: 1px solid #d5d5d5;
    transition: all 0.2s ease;
}

.btn-outline-dark-custom:hover {
    border-color: #777777;
    background-color: #fcfcfc;
}

.hero-image-box {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    background-color: #f7f7f7;
}

.hero-image-box img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
    aspect-ratio: 16/10;
}

/* --- 3 Category Cards Section --- */
.category-overview {
    padding: 20px 0 30px 0;
}

.feature-card {
    background: #fdfdfd;
    border: 1px solid #ececec;
    border-radius: 14px;
    overflow: hidden;
    height: 100%;
    display: flex;
    flex-direction: column;
    transition: all 0.25s ease;
}

.feature-card:hover {
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
    transform: translateY(-2px);
    border-color: #e0e0e0;
}

.feature-card-img {
    background: #ededed;
    aspect-ratio: 16/10;
    overflow: hidden;
}

.feature-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.35s ease;
}

.feature-card:hover .feature-card-img img {
    transform: scale(1.03);
}

.feature-card-content {
    padding: 22px 24px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.feature-card-title {
    font-size: 1.18rem;
    font-weight: 700;
    color: #111111;
    margin-bottom: 8px;
}

.feature-card-desc {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.55;
    margin-bottom: 18px;
    flex-grow: 1;
}

.feature-card-footer {
    display: flex;
    justify-content: flex-end;
    align-items: center;
}

.card-arrow-link {
    color: var(--brand-orange);
    font-size: 1.3rem;
    font-weight: 700;
    line-height: 1;
    transition: transform 0.2s ease;
}

.feature-card:hover .card-arrow-link {
    transform: translateX(4px);
}

/* --- Notice Banner --- */
.info-notice-bar {
    background-color: #f7f7f7;
    border-radius: 8px;
    padding: 12px 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-size: 0.88rem;
    font-weight: 500;
    color: #333333;
    margin-top: 30px;
}

.info-circle-icon {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    border: 1.5px solid var(--brand-orange);
    color: var(--brand-orange);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: 700;
    font-style: normal;
}

/* --- Single Page Catalog Section --- */
.catalog-section {
    padding: 60px 0;
    background-color: #fafafa;
    border-top: 1px solid #f0f0f0;
    margin-top: 40px;
}

.product-box {
    background: #ffffff;
    border: 1px solid #eaeaea;
    border-radius: 12px;
    padding: 16px;
    height: 100%;
}

.product-box-thumb {
    width: 100%;
    height: 180px;
    border-radius: 8px;
    overflow: hidden;
    background: #f0f0f0;
    margin-bottom: 14px;
}

.product-box-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.model-id-tag {
    font-size: 0.72rem;
    font-weight: 600;
    background: #f3f3f3;
    color: #555555;
    padding: 3px 8px;
    border-radius: 4px;
    display: inline-block;
    margin-bottom: 8px;
}

/* --- Footer & Legal Section --- */
.site-footer {
    background-color: #ffffff;
    padding: 50px 0 25px 0;
    border-top: 1px solid #ebebeb;
    font-size: 0.85rem;
    color: #666666;
}

.footer-col-title {
    font-size: 0.88rem;
    font-weight: 700;
    color: #111111;
    margin-bottom: 14px;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.footer-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-list li {
    margin-bottom: 8px;
}

.footer-list a:hover {
    color: var(--brand-orange);
}

.footer-disclaimer-box {
    margin-top: 35px;
    padding-top: 22px;
    border-top: 1px solid #f0f0f0;
    font-size: 0.78rem;
    color: #888888;
    line-height: 1.65;
}

/* --- Verification Modal --- */
.modal-content {
    border-radius: 14px;
    border: none;
    box-shadow: 0 15px 35px rgba(0,0,0,0.1);
}

@media (max-width: 991px) {
    .hero-section {
        padding: 30px 0 20px 0;
    }
    .hero-image-box {
        margin-top: 30px;
    }
}