/* Shared visual polish layer. Content and placeholder data stay in page HTML. */
:root {
    --page-max: 1200px;
    --page-gutter: clamp(18px, 4vw, 32px);
    --section-space: clamp(56px, 7vw, 88px);
    --surface: #ffffff;
    --surface-soft: #f7f8f7;
    --surface-muted: #e2e7e5;
    --text: #252b2a;
    --text-muted: #626d68;
    --line: #d3dbd7;
    --radius-sm: 4px;
    --radius-md: 8px;
    --shadow-soft: 0 12px 32px rgba(37,43,42, 0.08);
    --shadow-hover: 0 18px 44px rgba(37,43,42, 0.13);
}

*,
*::before,
*::after {
    letter-spacing: 0 !important;
}

html {
    scroll-padding-top: 96px;
}

body {
    color: var(--text);
    overflow-x: clip;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

img,
video {
    display: block;
    max-width: 100%;
}

.container {
    width: min(100%, var(--page-max));
    max-width: var(--page-max);
    padding-inline: var(--page-gutter);
}

section {
    padding-block: var(--section-space);
}

.section-header {
    max-width: 760px;
    margin: 0 auto clamp(32px, 5vw, 52px);
}

.section-tag {
    margin-bottom: 10px;
    font-size: 12px;
    line-height: 1.4;
}

.section-title {
    margin-bottom: 12px;
    color: var(--text);
    font-size: clamp(30px, 3.2vw, 42px);
    line-height: 1.15;
}

.section-subtitle {
    max-width: 680px;
    color: var(--text-muted);
    font-size: 16px;
    line-height: 1.75;
}

/* Header */
.top-bar {
    padding-block: 8px;
    background: var(--primary-dark);
    font-size: 12px;
    line-height: 20px;
}

.top-bar-content,
.top-bar-left,
.top-bar-right {
    align-items: center;
}

.top-bar-left,
.top-bar-right {
    gap: 18px;
}

.top-bar span,
.top-bar a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
}

.header {
    border-bottom: 1px solid rgba(37,43,42, 0.08);
    box-shadow: 0 6px 24px rgba(37,43,42, 0.07);
}

.header-wrapper {
    position: relative;
    display: grid;
    grid-template-columns: max-content minmax(0, 1fr) max-content;
    align-items: center;
    min-height: 76px;
    padding-block: 12px;
    column-gap: 24px;
}

.logo {
    flex: 0 0 auto;
}

.logo .logo-text {
    font-size: 28px;
    line-height: 1;
}

.main-nav {
    position: static;
    grid-column: 2;
    justify-self: center;
    align-items: center;
    justify-content: center;
    gap: clamp(18px, 2vw, 30px);
    transform: none;
}

.nav-link {
    font-size: 15px;
    line-height: 1.25;
    white-space: nowrap;
}

.header-actions {
    display: flex;
    grid-column: 3;
    justify-self: end;
    flex: 0 0 auto;
    align-items: center;
    gap: 10px;
}

.header-actions .btn-quote {
    display: inline-flex;
    min-height: 42px;
    align-items: center;
    justify-content: center;
    gap: 7px;
    margin-right: 0 !important;
    padding: 10px 18px;
    border-radius: var(--radius-sm);
    line-height: 1.2;
    white-space: nowrap;
}

.mobile-menu-toggle {
    width: 42px;
    height: 42px;
    flex: 0 0 42px;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    color: var(--primary);
}

.mobile-menu-toggle span {
    font-size: 25px;
    line-height: 1;
}

@media (max-width: 1500px) {
    .main-nav {
        gap: 18px;
    }

    .header-actions {
        gap: 8px;
    }

    .header-actions .btn-quote {
        padding-inline: 12px;
        font-size: 13px;
    }
}

/* Page headers and hero */
.page-header,
.blog-hero {
    padding-block: clamp(52px, 7vw, 76px) !important;
    background: var(--primary) !important;
}

.page-header h1,
.blog-hero h1 {
    margin-bottom: 10px;
    color: var(--white);
    font-size: clamp(34px, 4vw, 50px) !important;
    line-height: 1.12;
}

.page-header p,
.blog-hero p {
    max-width: 720px;
    margin-inline: auto;
    color: rgba(255, 255, 255, 0.82);
    font-size: clamp(16px, 2vw, 18px) !important;
}

.hero-slider {
    height: clamp(520px, 56vw, 700px);
    padding: 0;
}

.slide {
    background-size: cover;
}

.slide-content {
    width: min(100% - 40px, 620px);
}

.slide-btn,
.slide-btn-outline,
.btn-primary,
.btn-secondary,
.btn-white,
.btn-outline-white,
.btn-quote-sm {
    border-radius: var(--radius-sm);
}

/* Repeated content components */
.categories-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
}

.category-card {
    display: flex;
    min-width: 0;
    overflow: hidden;
    flex-direction: column;
    padding: 0 !important;
    background: var(--white) !important;
    text-align: left;
}

.category-image {
    overflow: hidden;
    aspect-ratio: 16 / 10;
    background: var(--surface-muted);
}

.category-image img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 240ms ease;
}

.category-card:hover .category-image img {
    transform: scale(1.025);
}

.category-content {
    padding: 18px 18px 20px;
}

.category-content h3 {
    margin-bottom: 6px;
    font-size: 15px;
}

.category-content p {
    color: var(--gray);
    font-size: 13px;
}

.pricing-card.featured .btn-quote-sm {
    border: 2px solid var(--white);
    background: var(--white);
    color: var(--primary-dark);
    box-shadow: 0 5px 14px rgba(0, 0, 0, 0.16);
}

.pricing-card.featured .btn-quote-sm:hover {
    border-color: var(--accent);
    background: var(--accent);
    color: var(--primary-dark);
}

.products-grid {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    align-items: stretch;
    justify-content: start;
}

.comparison-table-wrap {
    width: 100%;
    max-width: 1100px;
    margin: 40px auto 0;
    overflow-x: auto;
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    -webkit-overflow-scrolling: touch;
}

.comparison-table {
    display: table !important;
    width: 100% !important;
    min-width: 900px;
    max-width: none !important;
    border-collapse: collapse;
}

.products-filter {
    top: 76px !important;
}

.product-section,
.product-section > .container > [id] {
    scroll-margin-top: 190px;
}

.process-steps-six {
    display: grid !important;
    max-width: 1100px;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 18px !important;
    margin: 40px auto 0 !important;
}

.process-steps-six::before {
    display: none;
}

.process-steps-six .process-step {
    min-width: 0;
    padding-inline: 4px;
}

.process-steps-six .process-step:not(:last-child)::after {
    position: absolute;
    top: 27px;
    right: -18px;
    z-index: 2;
    color: var(--primary);
    content: "\2192";
    font-size: 24px;
    font-weight: 700;
}

.process-step-icon {
    display: flex;
    width: 72px;
    height: 72px;
    align-items: center;
    justify-content: center;
    margin: 0 auto 18px;
    border-radius: 50%;
    background: var(--primary);
    color: var(--white);
    font-size: 26px;
}

.process-steps-six .process-step h3 {
    margin-bottom: 8px;
}

.process-steps-six .process-step p {
    padding-inline: 4px;
    color: var(--gray);
    line-height: 1.55;
}

.category-card,
.product-card,
.feature-card,
.testimonial-card,
.pricing-card,
.cert-card,
.faq-item,
.blog-card,
.contact-form-card,
.contact-method,
.oem-feature,
.service-card {
    border-radius: var(--radius-md) !important;
}

.category-card,
.product-card,
.testimonial-card,
.cert-card,
.blog-card,
.contact-form-card,
.contact-method,
.oem-feature,
.service-card {
    border: 1px solid var(--line) !important;
    box-shadow: none !important;
}

.category-card:hover,
.product-card:hover,
.testimonial-card:hover,
.cert-card:hover,
.blog-card:hover,
.oem-feature:hover,
.service-card:hover {
    border-color: rgba(37,43,42, 0.24) !important;
    box-shadow: var(--shadow-hover) !important;
    transform: translateY(-3px);
}

.feature-card {
    border: 1px solid rgba(255, 255, 255, 0.14);
}

.product-card,
.blog-card {
    display: flex;
    min-width: 0;
    flex-direction: column;
}

.blog-card-img {
    height: 164px !important;
    background: var(--surface-muted) !important;
}

.product-info,
.blog-card-content {
    display: flex;
    min-width: 0;
    flex: 1;
    flex-direction: column;
}

.product-info .btn-quote-sm {
    align-self: flex-start;
    margin-top: auto;
}

.stats-wrapper {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
}

.stat-block {
    min-width: 0;
    padding: 10px;
}

.factory-grid,
.testimonials-grid,
.faq-grid,
.cert-grid {
    align-items: stretch;
}

.factory-grid,
.testimonials-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr)) !important;
}

.cert-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr)) !important;
}

.faq-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
}

.factory-item,
.factory-item img {
    border-radius: var(--radius-md) !important;
}

.factory-item {
    min-width: 0;
}

.factory-item img {
    width: 100%;
}

.footer {
    padding-block: 56px 26px;
    background: #252b2a;
}

.footer-grid {
    grid-template-columns: minmax(260px, 1.6fr) repeat(2, minmax(150px, 0.8fr)) minmax(220px, 1.1fr);
    gap: clamp(28px, 4vw, 52px);
}

.footer-col,
.footer-contact li,
.footer-links li {
    min-width: 0;
}

.footer-contact li {
    align-items: flex-start;
}

.social-links {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 16px;
}

.social-links a,
.social-links .social-link-pending {
    display: inline-flex;
    flex: 0 0 36px;
    width: 36px;
    height: 36px;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: #dce5e0;
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: var(--radius-sm);
}

.social-links .social-link-pending {
    opacity: 0.6;
    cursor: default;
}

/* Forms and tables */
input,
select,
textarea,
button {
    font: inherit;
}

input,
select,
textarea {
    max-width: 100%;
    border-radius: var(--radius-sm) !important;
}

.container table {
    display: block;
    width: 100%;
    max-width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.table-scroll {
    width: 100%;
    overflow-x: auto;
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    -webkit-overflow-scrolling: touch;
}

.newsletter-section form,
.blog-section + section form {
    align-items: stretch;
}

@media (max-width: 1120px) {
    .header-wrapper {
        gap: 16px;
    }

    .main-nav {
        gap: 16px;
    }

    .header-actions .btn-quote {
        padding-inline: 13px;
        font-size: 13px;
    }

    .footer-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 1050px) {
    .header-wrapper {
        display: flex;
    }

    .top-bar-content {
        justify-content: center;
        gap: 18px;
    }

    .top-bar-right {
        display: flex;
    }

    .top-bar .top-bar-certification,
    .top-bar .top-bar-email {
        display: none;
    }

    .main-nav {
        display: none;
        position: absolute;
        top: 100%;
        right: 0;
        left: 0;
        z-index: 120;
        transform: none;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 10px var(--page-gutter) 18px;
        border-top: 1px solid var(--line);
        background: var(--white);
        box-shadow: 0 18px 30px rgba(37,43,42, 0.12);
    }

    .main-nav.is-open {
        display: flex;
    }

    .main-nav .nav-link {
        padding: 12px 4px;
        border-bottom: 1px solid var(--line);
    }

    .main-nav .nav-link:last-child {
        border-bottom: 0;
    }

    .nav-link::after {
        display: none;
    }

    .mobile-menu-toggle {
        display: inline-flex;
    }

    .header-actions {
        margin-left: auto;
    }

    .header-actions .btn-quote {
        padding-inline: 12px;
    }

    .header-actions .btn-quote:not(:last-child) {
        display: none;
    }

    .categories-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .products-filter:not(.catalog-filter) {
        padding-block: 12px !important;
    }

    .products-filter:not(.catalog-filter) .filter-links {
        flex-wrap: nowrap !important;
        justify-content: flex-start !important;
        overflow-x: auto;
        padding-bottom: 3px;
        scrollbar-width: thin;
        -webkit-overflow-scrolling: touch;
    }

    .filter-link {
        flex: 0 0 auto;
    }

    .product-section,
    .product-section > .container > [id] {
        scroll-margin-top: 158px;
    }

    .process-steps-six {
        grid-template-columns: repeat(3, minmax(0, 1fr));
        row-gap: 36px !important;
    }

    .process-steps-six .process-step:nth-child(3)::after {
        display: none;
    }

    .products-grid,
    .features-grid,
    .factory-grid,
    .testimonials-grid,
    .cert-grid,
    .faq-grid,
    .pricing-grid,
    .blog-grid,
    section [style*="grid-template-columns"] {
        grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    }
}

@media (max-width: 640px) {
    :root {
        --page-gutter: 18px;
        --section-space: 52px;
    }

    html {
        scroll-padding-top: 132px;
    }

    .top-bar {
        padding-block: 7px;
    }

    .top-bar-content {
        min-width: 0;
    }

    .top-bar-left {
        justify-content: center;
        gap: 8px;
    }

    .top-bar {
        font-size: 11px;
    }

    .top-bar-content {
        gap: 12px;
    }

    .header-wrapper {
        min-height: 68px;
        flex-wrap: wrap;
        padding-block: 10px;
        gap: 10px;
    }

    .logo .logo-text {
        font-size: 23px;
    }

    .mobile-menu-toggle {
        order: 2;
    }

    .main-nav {
        order: 4;
    }

    .header-actions {
        order: 3;
        display: grid;
        width: 100%;
        grid-template-columns: repeat(auto-fit, minmax(0, 1fr));
        gap: 8px;
    }

    .header-actions .btn-quote,
    .header-actions .btn-quote:not(:last-child) {
        display: inline-flex;
        min-height: 38px;
        padding: 8px 7px;
        font-size: 12px;
    }

    .hero-slider {
        height: 500px;
    }

    .slide {
        background-size: cover;
    }

    .hero-slider > .slide:nth-of-type(1) {
        background-image: url('../images/optimized/75080072分辨率（手机)第一张.6bb6ece318a3.webp') !important;
    }

    .hero-slider > .slide:nth-of-type(2) {
        background-image: url('../images/optimized/75080072分辨率（手机)第二张.cc53f5bf06c8.webp') !important;
    }

    .hero-slider > .slide:nth-of-type(3) {
        background-image: url('../images/optimized/75080072分辨率（手机)第三张.c988c1e6374c.webp') !important;
    }

    .hero-slider > .slide:nth-of-type(n + 4) {
        background-color: var(--primary-dark);
        background-size: contain;
    }

    .slide-content {
        bottom: 52px;
        width: min(100% - 72px, 320px);
        gap: 10px;
    }

    .slide-btn,
    .slide-btn-outline {
        width: 100%;
        padding: 12px 16px;
        text-align: center;
    }

    .slider-arrow {
        width: 34px;
        height: 34px;
    }

    .trust-stats {
        padding-block: 40px;
    }

    .stats-wrapper {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 12px;
    }

    .stat-number {
        font-size: 34px;
    }

    .categories-grid,
    .products-grid,
    .features-grid,
    .factory-grid,
    .testimonials-grid,
    .cert-grid,
    .faq-grid,
    .pricing-grid,
    .blog-grid,
    section [style*="grid-template-columns"] {
        grid-template-columns: minmax(0, 1fr) !important;
    }

    .category-card,
    .feature-card,
    .cert-card,
    .testimonial-card,
    .faq-item {
        padding: 24px 20px !important;
    }

    .blog-card-img {
        height: 124px !important;
    }

    .factory-grid {
        gap: 16px !important;
    }

    .footer {
        padding-top: 48px;
    }

    .footer-grid {
        grid-template-columns: minmax(0, 1fr);
        gap: 34px;
    }

    .footer-col h4 {
        margin-bottom: 14px;
    }

    .newsletter-section form,
    .blog-section + section form,
    section form[style*="display: flex"] {
        flex-direction: column;
    }

    section form input,
    section form button {
        width: 100%;
        min-width: 0 !important;
    }

    .process-steps {
        flex-direction: column;
        align-items: stretch;
    }

    .process-steps-six {
        grid-template-columns: minmax(0, 1fr);
    }

    .process-steps-six .process-step::after {
        display: none;
    }

    .process-arrow {
        justify-content: center;
        transform: rotate(90deg);
    }

    .product-specs {
        flex-wrap: wrap;
    }

    .cta-buttons {
        align-items: stretch;
    }

    .cta-buttons a {
        width: 100%;
        text-align: center;
    }

    .page-header,
    .blog-hero {
        padding-block: 44px !important;
    }
}

/* Page ownership, in-page wayfinding and long-form reading. */
[hidden] { display: none !important; }
.certificate-placeholder { font-size: 20px; font-weight: 700; color: var(--primary); }
.section-nav {
    border-bottom: 1px solid var(--line);
    background: var(--white);
}
.section-nav > .container {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px 28px;
    padding-block: 18px;
}
.section-nav a, .text-link, .breadcrumbs a, .article-navigation a {
    color: var(--primary);
    font-size: 14px;
    font-weight: 600;
}
.section-nav a:hover, .text-link:hover, .breadcrumbs a:hover, .article-navigation a:hover {
    text-decoration: underline;
    text-underline-offset: 5px;
}
.section-link { margin-top: 32px; text-align: center; }
.cta-section > .container > h2 { color: white; text-align: center; font-family: 'Playfair Display', serif; font-size: 30px; margin-bottom: 24px; }
.factory-section { background: white; }
.factory-img { aspect-ratio: 5 / 3; overflow: hidden; background: var(--surface-muted); border-radius: 8px; }
.factory-img img { width: 100%; height: 100%; object-fit: cover; }
.article-link { margin-top: auto; padding-top: 20px; }
.article-link i { margin-left: 8px; }
.about-hero-grid { margin-bottom: 0; }
.about-text h2 { font-family: 'Playfair Display', serif; font-size: 32px; margin-bottom: 20px; }
.stats-banner .stats-wrapper { display: grid; }
.stats-banner .stat-text { color: rgba(255,255,255,.8); }
.service-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.product-section > .container > div[id] { margin-bottom: 60px; }
.product-section > .container > div[id]:last-child { margin-bottom: 0; }
.product-section .product-info { gap: 10px; }
.product-section .product-info .btn-quote-sm { align-self: stretch; text-align: center; }
.filter-links { flex-wrap: wrap; }
.products-filter .filter-link { padding: 10px 16px; }
.more-reviews, .upcoming-articles { margin-top: 32px; }
details > summary {
    cursor: pointer;
    color: var(--primary);
    font-weight: 600;
    padding: 18px 0;
}
.more-reviews > summary, .upcoming-articles > summary { border-top: 1px solid var(--line); }
details.faq-item { padding: 0 !important; align-self: start; }
details.faq-item > summary { padding: 20px; font-size: 15px; }
.faq-answer { padding: 0 20px 20px; color: var(--text-muted); font-size: 14px; line-height: 1.75; }
.faq-grid { align-items: start; }
.contact-resources { margin-top: 32px; border-top: 1px solid rgba(255,255,255,.3); padding-top: 24px; }
.contact-resources h3 { color: white; font-size: 17px; margin-bottom: 12px; }
.contact-resources a { display: block; color: white; font-size: 14px; margin: 12px 0; text-decoration: underline; text-underline-offset: 4px; }
.article-page { padding-block: 40px 72px; }
.article-page > .container { max-width: 880px; }
.breadcrumbs, .article-navigation { display: flex; gap: 16px; flex-wrap: wrap; }
.breadcrumbs { margin-bottom: 40px; }
.reading-content h1 { font-family: 'Playfair Display', serif; font-size: 38px; line-height: 1.25; margin: 20px 0 28px; }
.reading-content p, .reading-content li { line-height: 1.85; }
.reading-content ul, .reading-content ol { padding-left: 24px; }
.reading-content h3 { line-height: 1.4; }
.reading-content [style*="grid-template-columns"] { gap: 20px !important; }
.article-navigation { border-top: 1px solid var(--line); padding-top: 28px; margin-top: 48px; justify-content: space-between; }
.newsletter-section #newsletter-status { margin-top: 16px; }
[id] { scroll-margin-top: 150px; }
a:focus-visible, summary:focus-visible, button:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }
@media (max-width: 1050px) {
    .service-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
    .categories-grid, section .cert-grid { grid-template-columns: repeat(2, minmax(0, 1fr)) !important; gap: 12px; }
    .category-content { padding: 14px 12px; }
    .category-content h3 { font-size: 14px; line-height: 1.45; }
    .category-content p { font-size: 12px; }
    .cert-card { padding: 20px 10px !important; }
    .section-nav > .container { justify-content: flex-start; gap: 12px 22px; }
    .service-grid, .values-grid, .reading-content [style*="grid-template-columns"] { grid-template-columns: minmax(0, 1fr) !important; }
    .reading-content h1 { font-size: 28px; overflow-wrap: anywhere; }
    .reading-content h2 { font-size: 24px !important; }
    .category-card { padding: 0 !important; }
    .article-page { padding-block: 28px 48px; }
}