/* ====================== Global Reset & Base ====================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html {
    scroll-behavior: smooth;
}
body {
    font-family: 'Arial', sans-serif;
    color: #333333;
    line-height: 1.6;
    font-size: 15px;
}
ul {
    list-style: none;
}
a {
    text-decoration: none;
    color: inherit;
    transition: all 0.25s ease;
}
img {
    max-width: 100%;
    height: auto;
    display: block;
}
.container {
    width: 92%;
    max-width: 1240px;
    margin: 0 auto;
}
.flex-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
}
.section {
    padding: 70px 0;
}
.text-center {
    text-align: center;
}
.white-text {
    color: #ffffff;
}
.dark-bg {
    background-color: #111113;
}
.text-orange {
    color: #ff5800;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 11px 24px;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 14px;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
}
.btn-primary-orange {
    background-color: #ff5800;
    color: #fff;
}
.btn-primary-orange:hover {
    background-color: #e64e00;
    transform: translateY(-2px);
}
.btn-white-outline {
    background: transparent;
    color: #fff;
    border: 1px solid #fff;
}
.btn-white-outline:hover {
    background: #fff;
    color: #111;
}
.btn-black-solid {
    background-color: #111113;
    color: #fff;
}
.btn-black-solid:hover {
    background-color: #222;
    transform: translateY(-2px);
}

/* Section Common */
.section-label {
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: #ff5800;
    font-weight: 600;
    display: inline-block;
    margin-bottom: 8px;
}
.section-heading h2 {
    font-size: 30px;
    margin-bottom: 12px;
}
.heading-divider {
    width: 40px;
    height: 2px;
    background: #ff5800;
    margin: 8px auto 25px;
}

/* ====================== Top Bar ====================== */
.site-topbar {
    background: #111113;
    color: #fff;
    padding: 8px 0;
    font-size: 13px;
}
.topbar-wrap {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.topbar-right {
    display: flex;
    gap: 22px;
    align-items: center;
}
.topbar-right a {
    color: #fff;
}
.topbar-right a:hover {
    color: #ff5800;
}

/* ====================== Header Navigation ====================== */
.site-header {
    background-color: #111113;
    padding: 16px 0;
    position: sticky;
    top: 0;
    z-index: 999;
}
.header-wrap {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.site-logo img {
    height: 46px;
}
.main-navigation {
    display: flex;
    align-items: center;
    gap: 30px;
}
.nav-menu {
    display: flex;
    gap: 28px;
    text-transform: uppercase;
    font-size: 14px;
    font-weight: 500;
    color: #fff;
}
.nav-menu .menu-item.active a {
    color: #ff5800;
}
.nav-menu a:hover {
    color: #ff5800;
}
.mobile-menu-toggle {
    display: none;
    background: transparent;
    border: none;
    color: white;
    font-size: 24px;
}

/* ====================== Homepage Hero Banner ====================== */
.hero-banner {
    position: relative;
    padding: 110px 0;
    color: white;
    overflow: hidden;
}
.hero-bg-image {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: -2;
}
.hero-bg-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.hero-banner::after {
    content: "";
    position: absolute;
    width: 100%;
    height: 100%;
    left: 0;
    top:0;
    background: rgba(0,0,0,0.65);
    z-index: -1;
}
.hero-tag {
    font-size: 14px;
    text-transform: uppercase;
    color:#ff5800;
    letter-spacing:1px;
    font-weight:600;
}
.hero-content h1 {
    font-size: 52px;
    line-height:1.1;
    margin:12px 0 16px;
}
.hero-content p {
    max-width:520px;
    opacity:0.9;
    margin-bottom:26px;
}
.hero-buttons {
    display:flex;
    gap:16px;
    margin-bottom:40px;
}
.hero-features {
    display:grid;
    grid-template-columns: repeat(4, 1fr);
    max-width:800px;
    gap:20px;
}
.hero-feature-item {
    display:flex;
    align-items:center;
    gap:10px;
}
.hero-feature-item i {
    font-size:22px;
}
.hero-feature-item small {
    display:block;
    font-size:12px;
    opacity:0.8;
}

/* ====================== Product Section ====================== */
.products-grid {
    display:grid;
    grid-template-columns: repeat(6, 1fr);
    gap:22px;
}
.product-card {
    text-align:center;
    border:1px solid #eee;
    padding:18px 12px;
}
.product-img {
    height:140px;
    display:flex;
    align-items:center;
    justify-content:center;
    margin-bottom:14px;
}
.product-card h4 {
    font-size:15px;
    margin-bottom:4px;
}
.product-card p {
    font-size:12px;
    color:#666;
    margin-bottom:10px;
}
.product-link {
    font-size:13px;
    color:#ff5800;
    font-weight:500;
}
.product-link:hover {
    letter-spacing:0.5px;
}

/* ====================== Custom Mesh Section ====================== */
.custom-mesh-section {
    position:relative;
    padding:70px 0;
    background:#111;
    color:#fff;
    overflow:hidden;
}
.custom-mesh-image-col {
    flex:0 0 45%;
}
.custom-mesh-text-col {
    flex:0 0 55%;
    padding-left:40px;
}
.custom-mesh-text-col h2 {
    font-size:32px;
    margin-bottom:14px;
}
.custom-mesh-text-col p {
    opacity:0.85;
    margin-bottom:26px;
}
.custom-features-grid {
    display:grid;
    grid-template-columns: repeat(4,1fr);
    gap:20px;
    margin-bottom:30px;
}
.custom-feature-item {
    display:flex;
    align-items:center;
    gap:8px;
}
.custom-feature-item i {
    font-size:20px;
}
.custom-feature-item small {
    font-size:12px;
    opacity:0.8;
}

/* ====================== About Preview Section ====================== */
.about-preview-section {
    background:#f8f8f8;
}
.about-preview-image-col {
    flex:0 0 48%;
}
.about-preview-text-col {
    flex:0 0 52%;
    padding-left:40px;
}
.about-img-stack > img {
    margin-bottom:12px;
}
.small-img-group {
    display:grid;
    grid-template-columns: 1fr 1fr;
    gap:12px;
}
.about-data-grid {
    display:grid;
    grid-template-columns: repeat(4,1fr);
    gap:16px;
    margin:26px 0 30px;
}
.about-data-item {
    text-align:center;
}
.about-data-item i {
    font-size:22px;
    color:#ff5800;
    margin-bottom:6px;
}
.about-data-item small {
    font-size:12px;
    color:#666;
}

/* ====================== Service Bar ====================== */
.service-bar {
    padding:30px 0;
}
.service-grid {
    display:grid;
    grid-template-columns: repeat(4,1fr);
    gap:20px;
}
.service-item {
    display:flex;
    align-items:center;
    gap:12px;
    color:#fff;
}
.service-item i {
    font-size:24px;
}
.service-item h4 {
    font-size:15px;
}
.service-item small {
    font-size:12px;
    opacity:0.75;
}

/* ====================== About Us Page Shared Modules (保留兼容) ====================== */
/* Page Banner */
.page-hero-banner {
    position: relative;
    padding: 90px 0;
    color: white;
    overflow: hidden;
}
.banner-bg-image {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: -2;
}
.banner-bg-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.page-hero-banner::after {
    content: "";
    position: absolute;
    width: 100%;
    height: 100%;
    left: 0;
    top:0;
    background: rgba(0,0,0,0.58);
    z-index: -1;
}
.breadcrumbs {
    font-size: 13px;
    opacity: 0.85;
    margin-bottom: 10px;
}
.breadcrumb-current {
    color:#ff5800;
}
.page-hero-banner h1 {
    font-size: 46px;
    text-transform: uppercase;
    line-height: 1.1;
}
.banner-subtitle {
    color: #ff5800;
    font-size: 20px;
    font-weight: 500;
    margin: 6px 0 14px;
}
.banner-desc {
    max-width: 680px;
    opacity: 0.92;
}

/* Who We Are Section */
.who-row {
    gap: 50px;
}
.who-text-col, .who-image-col {
    flex: 1;
}
.who-text-col h2 {
    font-size: 29px;
    line-height: 1.25;
    margin-bottom: 20px;
}
.who-text-col p {
    margin-bottom: 16px;
    color: #444;
}
.who-image-col > img {
    margin-bottom: 26px;
}
.feature-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}
.feature-item {
    text-align: center;
}
.feature-item i {
    font-size: 28px;
    margin-bottom: 10px;
}
.feature-item span {
    font-size:13px;
    line-height:1.4;
}

/* Our Values Dark Section */
.our-values {
    position: relative;
    overflow: hidden;
}
.dark-bg-overlay-img {
    position: absolute;
    width:100%;
    height:100%;
    top:0;
    left:0;
    z-index:-2;
}
.dark-bg-overlay-img img {
    width:100%;
    height:100%;
    object-fit:cover;
}
.our-values::after {
    content:"";
    width:100%;
    height:100%;
    position:absolute;
    background:rgba(0,0,0,0.76);
    top:0;
    left:0;
    z-index:-1;
}
.values-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 24px;
    margin-top:40px;
}
.value-card {
    text-align:center;
    color:#fff;
}
.value-card i {
    font-size:32px;
    margin-bottom:14px;
}
.value-card h4 {
    margin-bottom: 8px;
    font-size:16px;
}
.value-card p {
    font-size:13px;
    opacity:0.85;
}

/* Our Factory Gallery */
.factory-gallery-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap:16px;
    margin-top:30px;
}
.factory-caption {
    display:block;
    margin-top:8px;
    font-size:12px;
    text-align:center;
}

/* Certificates Section */
.cert-row {
    gap:50px;
}
.cert-image-col, .cert-text-col {
    flex:1;
}
.cert-logo-grid {
    display:grid;
    grid-template-columns: repeat(4,1fr);
    gap:20px;
    margin-top:24px;
}
.cert-logo img {
    max-width:90px;
    margin:0 auto;
}

/* CTA Bar */
.cta-bar {
    padding:32px 0;
}
.cta-row {
    justify-content: space-between;
}
.cta-text-wrap {
    display:flex;
    align-items:center;
    gap:16px;
    color:#fff;
}
.cta-text-wrap i {
    font-size:26px;
}
.cta-text-wrap h3 {
    font-size:22px;
    margin-bottom:4px;
}

/* ====================== Footer ====================== */
.site-footer {
    background:#111113;
    color:#bbbbbb;
    padding:60px 0 30px;
}
.footer-top-wrap {
    display:grid;
    grid-template-columns: repeat(5,1fr);
    gap:32px;
}
.footer-widget h4 {
    color:#fff;
    margin-bottom:16px;
    font-size:16px;
}
.footer-widget p {
    margin-bottom:10px;
    font-size:13px;
}
.footer-widget li {
    margin-bottom:8px;
    font-size:13px;
}
.footer-widget a:hover {
    color:#ff5800;
}
.footer-social {
    display:flex;
    gap:10px;
    margin-top:14px;
}
.footer-social a {
    width:32px;
    height:32px;
    border:1px solid #444;
    display:flex;
    align-items:center;
    justify-content:center;
    color:#fff;
}
.footer-bottom-wrap {
    margin-top:40px;
    padding-top:25px;
    border-top:1px solid #282828;
    display:flex;
    justify-content:space-between;
    font-size:13px;
}
.footer-bottom-links a {
    margin-left:16px;
}

/* ====================== Responsive Media Query ====================== */
@media screen and (max-width: 1200px) {
    .products-grid {
        grid-template-columns: repeat(3,1fr);
    }
}
@media screen and (max-width: 1024px) {
    .nav-menu {
        display: none;
    }
    .mobile-menu-toggle {
        display:block;
    }
    .who-row, .cert-row {
        flex-direction:column;
    }
    .values-grid {
        grid-template-columns: repeat(3,1fr);
    }
    .factory-gallery-grid {
        grid-template-columns: repeat(3,1fr);
    }
    .custom-mesh-section .flex-row {
        flex-direction:column;
    }
    .custom-mesh-text-col {
        padding-left:0;
        margin-top:30px;
    }
    .about-preview-section .flex-row {
        flex-direction:column;
    }
    .about-preview-text-col {
        padding-left:0;
        margin-top:30px;
    }
    .footer-top-wrap {
        grid-template-columns: repeat(3,1fr);
    }
}
@media screen and (max-width:768px) {
    .hero-content h1 {
        font-size:36px;
    }
    .hero-features {
        grid-template-columns: repeat(2,1fr);
    }
    .feature-grid {
        grid-template-columns: repeat(2,1fr);
    }
    .values-grid {
        grid-template-columns: repeat(2,1fr);
    }
    .factory-gallery-grid {
        grid-template-columns: repeat(2,1fr);
    }
    .cert-logo-grid {
        grid-template-columns: repeat(2,1fr);
    }
    .custom-features-grid {
        grid-template-columns: repeat(2,1fr);
    }
    .about-data-grid {
        grid-template-columns: repeat(2,1fr);
    }
    .service-grid {
        grid-template-columns: repeat(2,1fr);
    }
    .cta-row {
        flex-direction:column;
        gap:20px;
        text-align:center;
    }
    .footer-top-wrap {
        grid-template-columns:1fr;
    }
    .footer-bottom-wrap {
        flex-direction:column;
        gap:12px;
        text-align:center;
    }
    .hero-buttons {
        flex-direction:column;
    }
}
@media screen and (max-width:480px) {
    .values-grid, .factory-gallery-grid, .products-grid {
        grid-template-columns:1fr;
    }
}