@media (max-width: 1100px) {
    .main-nav { gap: 17px; }
    .main-nav > a, .nav-dropdown > button { font-size: .78rem; }
    .service-grid, .product-grid { grid-template-columns: repeat(2,1fr); }
    .photo-product-grid { grid-template-columns: repeat(3,1fr); }
    .product-card { grid-template-columns: 125px 1fr; }
    .sector-grid { grid-template-columns: repeat(2,1fr); }
    .sector-grid article:nth-child(2) { border-right: 0; }
    .sector-grid article:nth-child(-n+2) { border-bottom: 1px solid #2b3b50; }
    .province-grid { grid-template-columns: repeat(3,1fr); }
    .compact-grid { grid-template-columns: repeat(3,1fr); }
    .dropdown-panel { grid-template-columns: repeat(2,minmax(0,1fr)); width: min(600px,calc(100vw - 30px)); }
}

@media (max-width: 900px) {
    .topbar { display: none; }
    .header-inner { min-height: 72px; }
    .menu-toggle { display: inline-flex; }
    .menu-toggle[aria-expanded="true"] .menu-open { display: none; }
    .menu-toggle[aria-expanded="true"] .menu-close { display: block; }
    .main-nav { position: absolute; top: 100%; right: 0; left: 0; display: none; width: 100%; height: calc(100vh - 72px); overflow-y: auto; flex-direction: column; align-items: stretch; gap: 0; padding: 18px 20px 35px; background: #fff; box-shadow: 0 18px 35px rgba(9,19,33,.14); }
    .main-nav.open { display: flex; }
    .main-nav > a, .nav-dropdown > button { width: 100%; padding: 15px 5px; border-bottom: 1px solid var(--line); text-align: left; }
    .main-nav > a::after, .nav-dropdown > button::after { display: none; }
    .nav-cta { margin-top: 18px; justify-content: center; border-bottom: 0 !important; }
    .dropdown-panel { position: static; display: none; grid-template-columns: 1fr; width: 100%; max-height: none; padding: 6px 0 12px 16px; overflow: visible; visibility: visible; opacity: 1; border: 0; border-bottom: 1px solid var(--line); border-radius: 0; box-shadow: none; transform: none; }
    .nav-dropdown:focus-within .dropdown-panel { transform: none; }
    .nav-dropdown.open .dropdown-panel { display: grid; transform: none; }
    .nav-dropdown:hover .dropdown-panel { display: none; transform: none; }
    .nav-dropdown.open:hover .dropdown-panel { display: grid; transform: none; }
    .hero-track { height: 680px; min-height: 0; }
    .hero-content h1, .hero-content h2, .hero-content p { width: min(700px, 85%); }
    .stats-grid { grid-template-columns: repeat(2,1fr); }
    .stats-grid p { min-height: 80px; }
    .stats-grid p:nth-child(2) { border-right: 0; }
    .stats-grid p:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
    .hero-stats { margin-top: 0; }
    .hero-controls { top: 620px; bottom: auto; }
    .split-layout, .row-head, .region-preview-inner, .contact-grid, .split-text { grid-template-columns: 1fr; gap: 45px; }
    .power-panel { grid-template-columns: 1fr; }
    .process-grid { grid-template-columns: repeat(2,1fr); }
    .process-grid::before { display: none; }
    .article-layout { grid-template-columns: 1fr; gap: 45px; }
    .article-content { max-width: none; }
    .sticky-card { position: static; }
    .article-aside { width: min(100%, 520px); }
    .section-number { position: static; display: block; margin-bottom: 7px; }
    .cta-inner { grid-template-columns: 1fr; gap: 32px; }
    .cta-actions { flex-direction: row; min-width: 0; }
    .page-hero-grid, .product-hero-grid { grid-template-columns: 1fr; }
    .hero-icon, .product-power { display: none; }
    .product-hero-photo { width: min(100%, 420px); height: 380px; }
    .photo-product-grid { grid-template-columns: repeat(2,1fr); }
    .footer-grid { grid-template-columns: repeat(2,1fr); }
}

@media (max-width: 650px) {
    .container, .narrow { width: min(calc(100% - 28px), var(--container)); }
    .section { padding: 70px 0; }
    body { font-size: 15px; }
    .brand strong { font-size: 1.15rem; }
    .brand small { font-size: .5rem; }
    .brand-mark { width: 34px; height: 41px; }
    .hero-track { height: 640px; }
    .hero-overlay { background: linear-gradient(90deg, rgba(6,14,25,.94), rgba(6,14,25,.69)); }
    .hero-content { top: 47%; }
    .hero-content h1, .hero-content h2, .hero-content p { width: 100%; }
    .hero-content p { font-size: .95rem; }
    .hero-actions { flex-direction: column; align-items: stretch; }
    .hero-actions .button { width: 100%; }
    .hero-slide.embedded-title > img { object-position: 63% center; }
    .embedded-title .hero-overlay { background: linear-gradient(90deg, rgba(6,14,25,.94), rgba(6,14,25,.63)); }
    .hero-content.embedded-content { top: 47%; bottom: auto; transform: translate(-50%, -50%); }
    .embedded-content .sr-only { position: static; width: 100%; height: auto; margin: 0 0 24px; overflow: visible; clip: auto; white-space: normal; }
    .embedded-content .hero-actions { width: 100%; padding: 0; background: transparent; border: 0; border-radius: 0; box-shadow: none; backdrop-filter: none; }
    .hero-controls { top: 580px; justify-content: center; }
    .hero-stats .container { width: 100%; }
    .stats-grid { width: 100%; margin-inline: 0; border-radius: 0; }
    .stats-grid p { padding: 0 15px; }
    .stats-grid strong { font-size: .88rem; }
    .stats-grid span { font-size: .67rem; }
    .split-layout { gap: 55px; }
    .visual-card { padding: 0 0 20px 14px; }
    .visual-card img { min-height: 360px; }
    .visual-badge { right: -4px; width: 120px; height: 120px; border-width: 6px; }
    .service-grid, .product-grid, .photo-product-grid, .sector-grid, .process-grid, .province-grid, .compact-grid { grid-template-columns: 1fr; }
    .service-card { min-height: 260px; }
    .power-panel { padding: 25px 16px; margin-inline: -7px; }
    .power-group { padding: 6px; }
    .power-chips a { width: calc(25% - 8px); height: 67px; }
    .special-products { grid-template-columns: 1fr; }
    .special-products a { min-height: 185px; }
    .sector-grid article { min-height: 210px; border-right: 0; border-bottom: 1px solid #2b3b50; }
    .sector-grid article:last-child { border-bottom: 0; }
    .sector-grid h3 { margin-top: 30px; }
    .process-grid { gap: 26px; }
    .process-grid li { display: grid; grid-template-columns: 55px 1fr; column-gap: 15px; text-align: left; }
    .process-grid li > span { grid-row: 1 / span 2; width: 50px; height: 50px; margin: 0; }
    .process-grid li h3 { margin: 5px 0 6px; }
    .page-hero, .product-hero { padding: 70px 0 76px; }
    .article-section { padding-top: 70px; }
    .article-content > section { margin-bottom: 45px; }
    .article-intro, .article-conclusion, .safety-note { padding: 23px; }
    .article-feature-image { margin-bottom: 42px; border-radius: 13px; }
    .article-feature-image img { min-height: 235px; aspect-ratio: auto; }
    .article-feature-image figcaption { right: 17px; bottom: 15px; left: 17px; }
    .cta-actions { flex-direction: column; }
    .product-card { grid-template-columns: 105px 1fr; }
    .product-visual span { font-size: 1.7rem; }
    .product-hero-photo { width: 100%; height: 330px; padding: 18px; border-width: 7px; }
    .form-card { padding: 25px 20px; }
    .form-row { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 38px; }
    .footer-bottom { flex-direction: column; gap: 8px; align-items: flex-start; }
    .floating-actions { right: 12px; bottom: 12px; }
    .floating-actions a { width: 47px; height: 47px; }
}