/* ============================================
   LingYue XinChuang — B2B International Trade
   Design System & Global Stylesheet
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
  /* Palette */
  --primary: #17324c;
  --primary-light: #284a67;
  --primary-dark: #08131f;
  --accent: #b96b2c;
  --accent-light: #d08a4d;
  --accent-dark: #8c4f21;
  --white: #ffffff;
  --bg: #f3f1ed;
  --bg-alt: #e7e3db;
  --text: #18212b;
  --text-light: #4f5d69;
  --text-muted: #7a8590;
  --border: #d7dbe3;
  --border-light: #e8ebf0;
  --success: #059669;
  --warning: #d97706;
  --danger: #dc2626;

  /* Typography */
  --font: 'Inter', 'Noto Sans SC', 'Noto Sans Arabic', -apple-system, BlinkMacSystemFont, sans-serif;
  --display: 'Barlow Condensed', 'Noto Sans SC', 'Noto Sans Arabic', sans-serif;

  /* Spacing scale */
  --sp-xs: 4px;
  --sp-sm: 8px;
  --sp-md: 16px;
  --sp-lg: 24px;
  --sp-xl: 32px;
  --sp-2xl: 48px;
  --sp-3xl: 64px;
  --sp-4xl: 96px;

  /* Layout */
  --max-width: 1200px;
  --header-h: 72px;
  --topbar-h: 36px;
  --radius: 8px;
  --radius-lg: 12px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,.06);
  --shadow: 0 4px 16px rgba(0,0,0,.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,.12);

  /* Transitions */
  --ease: .25s cubic-bezier(.4,0,.2,1);
  --ease-out: .2s cubic-bezier(0,0,.2,1);
}

/* --- Reset --- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
body{font-family:var(--font);font-size:16px;line-height:1.65;color:var(--text);background:var(--white);overflow-x:hidden}
h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.18;color:var(--text);text-wrap:balance}
h1,h2{font-family:var(--display);letter-spacing:-.012em;text-transform:uppercase}
h1{font-size:clamp(2.3rem,5.8vw,5.6rem)}
h2{font-size:clamp(1.75rem,3.4vw,3.2rem)}
h3{font-size:clamp(1.05rem,2vw,1.35rem)}
a{color:var(--primary);text-decoration:none;transition:color var(--ease)}
a:hover{color:var(--accent)}
img{max-width:100%;height:auto;display:block}
ul{list-style:none}
table{width:100%;border-collapse:collapse}

/* --- Utility --- */
.container{width:100%;max-width:var(--max-width);margin:0 auto;padding:0 20px}
.section{padding:80px 0}
.section-title{text-align:center;margin-bottom:12px;color:var(--primary-dark)}
.section-subtitle{text-align:center;color:var(--text-light);max-width:620px;margin:0 auto 48px;font-size:1.05rem}
.text-center{text-align:center}
.section-title.align-left,.section-subtitle.align-left{text-align:left;margin-left:0}
.eyebrow{font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.16em;color:var(--accent-light);margin-bottom:16px}
.eyebrow-dark{color:var(--accent-dark)}
.section-heading-row{display:grid;grid-template-columns:minmax(0,1fr) minmax(280px,520px);gap:48px;align-items:end;margin-bottom:34px}

/* --- Buttons --- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 28px;border-radius:var(--radius);font-weight:600;font-size:.95rem;cursor:pointer;transition:background-color var(--ease),border-color var(--ease),color var(--ease),transform var(--ease),box-shadow var(--ease);border:2px solid transparent;white-space:nowrap}
.btn-primary{background:var(--accent);color:#fff;border-color:var(--accent)}
.btn-primary:hover{background:var(--accent-dark);border-color:var(--accent-dark);color:#fff;transform:translateY(-1px);box-shadow:0 4px 12px rgba(232,122,46,.35)}
.btn-outline{background:transparent;color:var(--primary);border-color:var(--primary)}
.btn-outline:hover{background:var(--primary);color:#fff;transform:translateY(-1px)}
.btn-white{background:#fff;color:var(--primary);border-color:#fff}
.btn-white:hover{background:var(--accent);border-color:var(--accent);color:#fff}
.btn-lg{padding:16px 36px;font-size:1.05rem}
.btn-sm{padding:8px 18px;font-size:.85rem}
.btn-hero-outline{border-color:rgba(255,255,255,.45);color:#fff}
.btn-hero-outline:hover{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.7);color:#fff}

/* --- Top Bar --- */
.top-bar{background:var(--primary-dark);color:rgba(255,255,255,.75);font-size:.82rem;height:var(--topbar-h);line-height:var(--topbar-h)}
.top-bar .container{display:flex;justify-content:space-between;align-items:center;height:100%}
.top-bar a{color:rgba(255,255,255,.85)}
.top-bar a:hover{color:var(--accent-light)}
.top-bar-contact{display:flex;gap:20px}
.top-bar-contact span,.top-bar-contact a{display:flex;align-items:center;gap:4px}

/* Language Switcher */
.lang-switcher{display:flex;align-items:center;gap:2px;position:relative}
.lang-switcher button{background:none;border:none;color:rgba(255,255,255,.65);cursor:pointer;font-size:.78rem;padding:4px 8px;border-radius:4px;transition:all var(--ease);font-family:var(--font)}
.lang-switcher button:hover{color:#fff;background:rgba(255,255,255,.1)}
.lang-switcher button.active{color:var(--accent-light);background:rgba(255,255,255,.08);font-weight:600}

/* --- Header / Navigation --- */
.header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.97);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);box-shadow:var(--shadow-sm);height:var(--header-h)}
.header .container{display:flex;justify-content:space-between;align-items:center;height:100%}
.logo{display:flex;align-items:center;gap:10px;font-size:1.15rem;font-weight:700;color:var(--primary-dark)}
.logo img{height:38px;width:auto}
.nav{display:flex;align-items:center;gap:28px}
.nav-link{color:var(--text);font-weight:500;font-size:.95rem;position:relative;padding:6px 0;transition:color var(--ease)}
.nav-link::after{content:'';position:absolute;bottom:-2px;left:0;width:0;height:2px;background:var(--accent);transition:width var(--ease)}
.nav-link:hover,.nav-link.active{color:var(--primary)}
.nav-link:hover::after,.nav-link.active::after{width:100%}
.nav-cta{margin-left:4px}
.nav-cta .btn{padding:10px 20px;font-size:.88rem}
.nav-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;background:none;border:none;padding:4px}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--primary);border-radius:2px;transition:all var(--ease-out)}

/* --- Hero --- */
.hero{position:relative;padding:112px 0 92px;background:var(--primary-dark);color:#fff;overflow:hidden;min-height:620px;display:flex;align-items:center}
.hero-industrial{background-image:linear-gradient(90deg,rgba(6,14,23,.96) 0%,rgba(6,14,23,.86) 34%,rgba(6,14,23,.35) 66%,rgba(6,14,23,.18) 100%),url('../images/products/catalog/ductile-manhole-stacks.jpg');background-size:cover;background-position:center}
.hero::before{content:'';position:absolute;inset:0;background:linear-gradient(180deg,rgba(255,255,255,.05),transparent 28%,rgba(0,0,0,.2));pointer-events:none}
.hero::after{content:'';position:absolute;left:0;right:0;bottom:0;height:1px;background:rgba(255,255,255,.14)}
.hero .container{display:grid;grid-template-columns:minmax(0,680px) 1fr;gap:56px;align-items:end;position:relative;z-index:1}
.hero-content h1{color:#f6f0e7;margin-bottom:22px;line-height:.98}
.hero-content h1 .hl{color:var(--accent-light)}
.hero-content p{font-size:1.08rem;color:rgba(246,240,231,.78);margin-bottom:34px;max-width:610px;line-height:1.8;text-wrap:pretty}
.hero-buttons{display:flex;gap:14px;flex-wrap:wrap}
.hero-visual{display:flex;justify-content:flex-end}
.hero-badge{display:grid;gap:12px;min-width:230px}
.hero-badge-item{background:rgba(8,19,31,.72);border-left:2px solid rgba(208,138,77,.8);padding:18px 20px;text-align:left;box-shadow:0 12px 30px rgba(0,0,0,.22)}
.hero-badge-item .num{font-family:var(--display);font-size:2.1rem;line-height:1;font-weight:800;color:var(--accent-light);font-variant-numeric:tabular-nums}
.hero-badge-item .lbl{font-size:.78rem;color:rgba(246,240,231,.62);margin-top:6px;text-transform:uppercase;letter-spacing:.08em}

/* --- Procurement Trust Strip --- */
.trust-strip{background:var(--primary-dark);border-top:1px solid rgba(255,255,255,.1);border-bottom:1px solid rgba(255,255,255,.08)}
.trust-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr))}
.trust-item{padding:24px 28px;border-right:1px solid rgba(255,255,255,.08)}
.trust-item:last-child{border-right:none}
.trust-item strong{display:block;font-family:var(--display);font-size:clamp(1.45rem,2.4vw,2.25rem);line-height:1;color:#f6f0e7;letter-spacing:-.01em}
.trust-item span{display:block;margin-top:8px;color:rgba(246,240,231,.62);font-size:.86rem;line-height:1.5}

/* --- Product Line Sections --- */
.product-lines-section{background:linear-gradient(180deg,#fff 0%,var(--bg) 100%)}
.line-hero{position:relative;min-height:430px;border-radius:14px;overflow:hidden;cursor:pointer;background:var(--primary-dark);box-shadow:0 22px 55px rgba(8,19,31,.18);margin-bottom:26px}
.line-hero img{width:100%;height:100%;min-height:430px;object-fit:cover;filter:saturate(.92) contrast(.98)}
.line-hero::after{content:'';position:absolute;inset:0;background:linear-gradient(90deg,rgba(8,19,31,.9),rgba(8,19,31,.45) 46%,rgba(8,19,31,.05))}
.line-hero-copy{position:absolute;left:36px;bottom:34px;z-index:1;max-width:520px;color:#fff}
.line-hero-copy h3{color:#fff;font-family:var(--display);font-size:clamp(1.6rem,3vw,2.8rem);text-transform:uppercase;line-height:1;margin:14px 0 10px}
.line-hero-copy p{color:rgba(255,255,255,.76);font-size:.98rem;line-height:1.7}
.cast-product-grid{grid-template-columns:repeat(3,minmax(0,1fr));margin-top:22px}
.secondary-line{margin-top:52px;padding-top:28px;border-top:1px solid var(--border);display:grid;grid-template-columns:minmax(240px,380px) 1fr;gap:28px;align-items:start}
.secondary-line h3{font-size:1.35rem;margin-bottom:8px;color:var(--primary-dark)}
.secondary-line p{color:var(--text-light);font-size:.94rem;line-height:1.7}
.secondary-cards,.catalog-secondary{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.mini-line-card{display:block;position:relative;border-radius:10px;overflow:hidden;min-height:180px;background:var(--bg-alt);color:#fff;box-shadow:0 10px 24px rgba(8,19,31,.12)}
.mini-line-card img{width:100%;height:100%;min-height:180px;object-fit:cover;filter:saturate(.92)}
.mini-line-card::after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,transparent 35%,rgba(8,19,31,.72))}
.mini-line-card span{position:absolute;left:18px;bottom:15px;z-index:1;color:#fff;font-weight:700}

/* --- Capability Matrix --- */
.capability-band{display:grid;grid-template-columns:minmax(260px,360px) 1fr;gap:34px;align-items:stretch;margin:34px 0 46px;padding:30px;background:#fff;border-radius:14px;box-shadow:0 14px 38px rgba(8,19,31,.08)}
.capability-copy h3{font-family:var(--display);font-size:clamp(1.4rem,2.6vw,2.3rem);text-transform:uppercase;line-height:1.02;margin-bottom:12px;color:var(--primary-dark)}
.capability-copy p{color:var(--text-light);line-height:1.75}
.capability-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.capability-card{display:flex;flex-direction:column;gap:8px;padding:20px;background:linear-gradient(180deg,#f9f7f2,#f0ece4);border-radius:10px;color:var(--text);border:1px solid rgba(8,19,31,.08);transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease)}
.capability-card:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(8,19,31,.1);border-color:rgba(185,107,44,.35);color:var(--text)}
.capability-card span,.catalog-guide-card span,.role-card span{font-size:.72rem;text-transform:uppercase;letter-spacing:.14em;color:var(--accent-dark);font-weight:800}
.capability-card strong,.catalog-guide-card strong,.role-card h3{font-size:1rem;line-height:1.35;color:var(--primary-dark)}
.capability-card small,.catalog-guide-card small{color:var(--text-light);line-height:1.55;font-size:.84rem}

/* --- Features Grid --- */
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:24px}
.feature-card{background:var(--white);border:1px solid var(--border-light);border-radius:var(--radius-lg);padding:32px 24px;transition:all var(--ease)}
.feature-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:var(--accent)}
.feature-icon{width:52px;height:52px;background:rgba(232,122,46,.1);border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:1.4rem;margin-bottom:18px}
.feature-code{font-size:.72rem;font-weight:800;letter-spacing:.08em;color:var(--accent-dark);font-family:var(--font)}
.feature-card h3{font-size:1.05rem;margin-bottom:8px}
.feature-card p{color:var(--text-light);font-size:.92rem;line-height:1.6}

/* --- Export Order Flow --- */
.order-flow-section{background:#fff}
.order-steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.order-step{position:relative;padding:26px 22px 24px;background:var(--primary-dark);border-radius:12px;overflow:hidden;min-height:220px}
.order-step::after{content:'';position:absolute;right:-30px;bottom:-42px;width:130px;height:130px;border-radius:50%;background:rgba(208,138,77,.12)}
.order-step span{display:block;font-family:var(--display);font-size:2.4rem;line-height:1;color:rgba(208,138,77,.95);margin-bottom:22px}
.order-step h3{position:relative;color:#fff;font-size:1.02rem;margin-bottom:10px;z-index:1}
.order-step p{position:relative;color:rgba(246,240,231,.68);font-size:.88rem;line-height:1.65;z-index:1}

/* --- CTA Banner --- */
.cta-banner{background:linear-gradient(135deg,var(--accent-dark),var(--accent));color:#fff;padding:64px 0;text-align:center}
.cta-banner h2{color:#fff;margin-bottom:10px}
.cta-banner p{opacity:.9;margin-bottom:24px;font-size:1.05rem}

/* --- Product Cards --- */
.product-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}
.product-card{background:var(--white);border:1px solid rgba(8,19,31,.08);border-radius:10px;overflow:hidden;transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);cursor:pointer}
.product-card:hover{transform:translateY(-3px);box-shadow:0 18px 38px rgba(8,19,31,.12);border-color:rgba(185,107,44,.34)}
.product-img{aspect-ratio:4/3;background:var(--bg-alt);display:flex;align-items:center;justify-content:center;font-size:3rem;color:var(--text-muted);position:relative;overflow:hidden}
.product-img img{width:100%;height:100%;object-fit:cover}
.product-body{padding:20px 24px}
.product-body h3{font-size:1.05rem;margin-bottom:6px;color:var(--primary-dark)}
.product-body .product-meta{font-size:.82rem;color:var(--text-muted);display:flex;gap:16px;margin-bottom:12px}
.product-body .product-desc{font-size:.88rem;color:var(--text-light);line-height:1.6;margin-bottom:14px}
.product-body .btn-sm{width:100%;justify-content:center}
.product-tag{display:inline-block;padding:4px 10px;background:rgba(232,122,46,.08);color:var(--accent-dark);border-radius:20px;font-size:.75rem;font-weight:600}

/* --- Category Tabs --- */
.cat-tabs{display:flex;justify-content:center;gap:12px;margin-bottom:32px;flex-wrap:wrap}
.cat-tab{padding:12px 28px;border:2px solid var(--border);border-radius:var(--radius);background:var(--white);font-weight:600;font-size:.92rem;cursor:pointer;transition:all var(--ease);font-family:var(--font);color:var(--text)}
.cat-tab:hover{border-color:var(--accent);color:var(--accent)}
.cat-tab.active{background:var(--accent);border-color:var(--accent);color:#fff}
.sub-tabs{display:flex;justify-content:center;gap:8px;margin-bottom:40px;flex-wrap:wrap}
.sub-tab{padding:6px 16px;border:1px solid var(--border-light);border-radius:20px;background:var(--white);font-size:.82rem;cursor:pointer;transition:all var(--ease);font-family:var(--font);color:var(--text-light)}
.sub-tab:hover,.sub-tab.active{background:var(--primary);border-color:var(--primary);color:#fff}

/* --- Modal --- */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.55);z-index:200;display:flex;align-items:center;justify-content:center;padding:20px;opacity:0;visibility:hidden;transition:all var(--ease)}
.modal-overlay.open{opacity:1;visibility:visible}
.modal{background:var(--white);border-radius:var(--radius-lg);max-width:800px;width:100%;max-height:90vh;overflow-y:auto;position:relative}
.modal-close{position:absolute;top:12px;right:16px;background:none;border:none;font-size:1.5rem;cursor:pointer;color:var(--text-muted);z-index:1;width:36px;height:36px;display:flex;align-items:center;justify-content:center;border-radius:50%;transition:all var(--ease)}
.modal-close:hover{background:var(--bg-alt);color:var(--text)}
.modal-body{display:grid;grid-template-columns:1fr 1fr;gap:0}
.modal-img{aspect-ratio:4/3;background:var(--bg-alt);display:flex;align-items:center;justify-content:center;font-size:4rem;color:var(--text-muted)}
.modal-info{padding:32px}
.modal-info h2{font-size:1.3rem;margin-bottom:8px}
.modal-info .modal-meta{font-size:.85rem;color:var(--text-muted);margin-bottom:20px}
.modal-info .specs-table{margin-bottom:20px}
.modal-info .specs-table tr{border-bottom:1px solid var(--border-light)}
.modal-info .specs-table td{padding:8px 0;font-size:.9rem}
.modal-info .specs-table td:first-child{font-weight:600;color:var(--text);width:40%}
.modal-info .specs-table td:last-child{color:var(--text-light)}

/* --- Page Banners / Catalog --- */
.page-banner{position:relative;background:linear-gradient(135deg,var(--primary-dark),var(--primary));color:#fff;padding:78px 0;text-align:center;overflow:hidden}
.page-banner::before{content:'';position:absolute;inset:0;background:linear-gradient(90deg,rgba(8,19,31,.88),rgba(8,19,31,.7));z-index:0}
.page-banner .container{position:relative;z-index:1}
.products-banner{background-image:url('../images/products/catalog/ductile-manhole-stacks.jpg');background-size:cover;background-position:center 58%}
.about-banner{background-image:url('../images/site/factory-floor.jpg');background-size:cover;background-position:center}
.contact-banner{background-image:url('../images/products/refined/pipe-flanged.jpg');background-size:cover;background-position:center 55%}
.kids-banner{background-image:url('../images/site/kids-bicycles.jpg');background-size:cover;background-position:center}
.page-banner h1{color:#fff;margin-bottom:10px}
.page-banner p{max-width:680px;margin:0 auto;color:rgba(255,255,255,.78)}
.catalog-intro{background:var(--bg);padding-bottom:28px}
.catalog-lead{display:grid;grid-template-columns:1.35fr .9fr;gap:34px;align-items:center;background:#fff;border-radius:14px;overflow:hidden;box-shadow:0 16px 42px rgba(8,19,31,.1)}
.catalog-lead img{width:100%;height:100%;min-height:360px;object-fit:cover}
.catalog-lead>div{padding:34px 34px 34px 0}
.catalog-lead h2{font-size:clamp(1.6rem,3vw,2.9rem);margin-bottom:12px}
.catalog-lead p{color:var(--text-light);margin-bottom:24px}
.catalog-secondary{max-width:620px;margin:20px 0 0 auto}
.catalog-section{padding-top:44px}
.catalog-guide{margin-bottom:36px}
.catalog-guide-head{max-width:760px;margin-bottom:22px}
.catalog-guide-head h2{font-size:clamp(1.6rem,3vw,2.75rem);margin-bottom:10px}
.catalog-guide-head p{color:var(--text-light);line-height:1.75}
.catalog-guide-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
.catalog-guide-card{display:flex;flex-direction:column;gap:9px;min-height:190px;padding:20px;background:#fff;border-radius:10px;border:1px solid rgba(8,19,31,.08);box-shadow:0 10px 24px rgba(8,19,31,.06);color:var(--text)}
.catalog-guide-card:hover{color:var(--text);border-color:rgba(185,107,44,.35);box-shadow:0 16px 34px rgba(8,19,31,.1);transform:translateY(-2px)}

/* --- About Page --- */
.about-layout{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.about-img{aspect-ratio:4/3;background:linear-gradient(135deg,var(--bg-alt),var(--bg));border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:5rem;color:var(--text-muted);overflow:hidden}
.about-photo img,.quality-photo img{width:100%;height:100%;object-fit:cover;filter:saturate(.92) contrast(.98)}
.about-text h2{margin-bottom:18px}
.about-text p{margin-bottom:14px;color:var(--text-body, var(--text-light));line-height:1.8}
.stats-row{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:28px}
.stat-box{text-align:center;padding:20px 12px;background:var(--bg);border-radius:var(--radius)}
.stat-num{font-size:1.8rem;font-weight:800;color:var(--accent)}
.stat-lbl{font-size:.82rem;color:var(--text-muted);margin-top:4px}

/* --- Process Steps --- */
.process-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:20px}
.process-step{text-align:center;padding:24px 16px}
.process-step .step-num{width:40px;height:40px;border-radius:50%;background:var(--accent);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:1.1rem;margin-bottom:12px}
.process-step h4{font-size:.95rem;margin-bottom:6px}
.process-step p{font-size:.82rem;color:var(--text-muted);line-height:1.5}
.quality-layout{display:grid;grid-template-columns:1fr 1fr;gap:54px;align-items:center}
.quality-photo{aspect-ratio:4/3;border-radius:12px;overflow:hidden;box-shadow:0 16px 40px rgba(8,19,31,.12)}
.compact-process{grid-template-columns:repeat(2,minmax(0,1fr))}
.cooperation-section{background:#fff}
.role-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.role-card{padding:26px;background:var(--bg);border-radius:12px;border:1px solid rgba(8,19,31,.08)}
.role-card h3{margin:14px 0 10px}
.role-card p{color:var(--text-light);font-size:.92rem;line-height:1.75}
.about-page .section{padding:66px 0}
.about-page .page-banner{padding:66px 0}
.about-page .cta-banner{padding:54px 0}
.about-page .section-heading-row{margin-bottom:28px}
.about-feature-grid,.about-process-grid{margin-top:26px}
.about-factory-subtitle{max-width:760px;margin-bottom:0}
.customer-support-note{max-width:900px;margin:30px auto 0;padding-top:26px;border-top:1px solid var(--border);text-align:center}
.customer-support-note h3{margin-bottom:10px;color:var(--primary-dark)}
.customer-support-note p{color:var(--text-light);line-height:1.75}
.about-advantages .feature-card:hover{border-color:var(--border-light)}

/* --- Certification Bar --- */
.cert-bar{display:flex;justify-content:center;gap:32px;flex-wrap:wrap;padding:32px 0}
.cert-item{text-align:center;padding:16px 24px;border:1px solid var(--border-light);border-radius:var(--radius);min-width:120px}
.cert-item .cert-icon{font-size:2rem;margin-bottom:8px}
.cert-item .cert-name{font-size:.85rem;font-weight:600}

/* --- Contact Page --- */
.contact-layout{display:grid;grid-template-columns:1fr 1fr;gap:60px}
.contact-info h2{margin-bottom:16px}
.contact-info>p{color:var(--text-light);margin-bottom:28px}
.contact-detail{display:flex;gap:14px;margin-bottom:22px;align-items:flex-start}
.contact-detail-icon{width:44px;height:44px;min-width:44px;background:rgba(26,54,93,.08);border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:1.1rem}
.contact-detail h4{font-size:.95rem;margin-bottom:2px}
.contact-detail p{color:var(--text-light);font-size:.9rem}
.rfq-card{margin-top:30px;padding:26px;background:var(--bg);border-radius:12px;border:1px solid rgba(8,19,31,.08)}
.rfq-card h3{margin-bottom:16px;color:var(--primary-dark)}
.check-list{display:grid;gap:12px}
.check-list li{position:relative;padding-left:24px;color:var(--text-light);font-size:.92rem;line-height:1.6}
.check-list li::before{content:'';position:absolute;left:0;top:.62em;width:8px;height:8px;border-radius:50%;background:var(--accent)}

/* FAQ */
.faq-item{border-bottom:1px solid var(--border-light);margin-bottom:0}
.faq-q{width:100%;text-align:left;padding:16px 0;background:none;border:none;font-size:.95rem;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-family:var(--font);color:var(--text)}
.faq-q:hover{color:var(--accent)}
.faq-q::after{content:'+';font-size:1.2rem;transition:transform var(--ease)}
.faq-q.open::after{content:'−'}
.faq-a{max-height:0;overflow:hidden;transition:max-height var(--ease);padding:0}
.faq-a.open{max-height:200px;padding-bottom:16px}
.faq-a p{font-size:.9rem;color:var(--text-light);line-height:1.7}

/* --- Contact Form --- */
.contact-form{background:var(--bg);padding:36px;border-radius:var(--radius-lg)}
.contact-form h3{margin-bottom:22px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-group{margin-bottom:18px}
.form-group label{display:block;margin-bottom:5px;font-weight:600;font-size:.88rem}
.form-group input,.form-group select,.form-group textarea{width:100%;padding:11px 14px;border:1px solid var(--border);border-radius:var(--radius);font-family:var(--font);font-size:.95rem;transition:border-color var(--ease);background:var(--white)}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(232,122,46,.12)}
.form-group textarea{resize:vertical;min-height:120px}
.form-honey{position:absolute!important;left:-10000px!important;width:1px!important;height:1px!important;overflow:hidden!important}
.consent-row{display:flex;align-items:flex-start;gap:10px;margin:4px 0 20px;color:var(--text-light);font-size:.84rem;line-height:1.55;cursor:pointer}
.consent-row input{flex:0 0 auto;width:16px;height:16px;margin-top:3px;accent-color:var(--accent)}
.consent-row a{color:var(--accent-dark);font-weight:600;text-decoration:underline;text-underline-offset:2px}
.privacy-content{max-width:900px;margin:0 auto}
.privacy-intro{font-size:1.05rem;line-height:1.8;color:var(--text-light);margin-bottom:34px}
.privacy-block{padding:26px 0;border-top:1px solid var(--border)}
.privacy-block h2{font-size:1.35rem;margin-bottom:10px}
.privacy-block p{color:var(--text-light);line-height:1.8;margin:0}
.form-message{padding:12px 16px;border-radius:var(--radius);margin-bottom:18px;font-size:.88rem;font-weight:500}
.form-message-success{background:#e8f5e9;color:#2e7d32;border:1px solid #a5d6a7}
.form-message-error{background:#ffebee;color:#c62828;border:1px solid #ef9a9a}

/* --- Footer --- */
.footer{background:var(--primary-dark);color:rgba(255,255,255,.65);padding:60px 0 28px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:36px}
.footer h4{color:#fff;margin-bottom:18px;font-size:1rem}
.footer-about p{font-size:.9rem;line-height:1.7}
.footer-links li{margin-bottom:9px}
.footer-links a{color:rgba(255,255,255,.55);font-size:.9rem;transition:color var(--ease)}
.footer-links a:hover{color:var(--accent-light)}
.footer-contact li{margin-bottom:9px;font-size:.9rem;display:flex;gap:8px;align-items:flex-start}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding-top:20px;text-align:center;font-size:.84rem;color:rgba(255,255,255,.4)}

/* --- Toast --- */
.toast{position:fixed;bottom:24px;right:24px;background:var(--text);color:#fff;padding:14px 24px;border-radius:var(--radius);font-size:.9rem;z-index:300;transform:translateY(100px);opacity:0;transition:all var(--ease);box-shadow:var(--shadow-lg)}
.toast.show{transform:translateY(0);opacity:1}
.toast.success{background:var(--success)}
.toast.error{background:var(--danger)}

/* --- Placeholder Images --- */
.img-placeholder{width:100%;height:100%;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#e0e5ec,#c8d0db);color:var(--text-muted);font-size:2.5rem}
.img-placeholder-lg{font-size:5rem}

/* --- Responsive --- */
@media(max-width:1024px){
  .hero .container,.catalog-lead,.quality-layout{grid-template-columns:1fr}
  .trust-grid,.order-steps,.catalog-guide-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .capability-band{grid-template-columns:1fr}
  .role-grid{grid-template-columns:1fr}
  .catalog-lead>div{padding:0 28px 32px}
  .cast-product-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .top-bar-contact{display:none}
  .nav{position:absolute;top:100%;left:0;width:100%;background:var(--white);flex-direction:column;padding:20px;box-shadow:var(--shadow);visibility:hidden;opacity:0;pointer-events:none;transform:translateY(-8px);transition:opacity var(--ease),transform var(--ease-out),visibility 0s linear var(--ease);z-index:99}
  .nav.open{visibility:visible;opacity:1;pointer-events:auto;transform:translateY(0);transition-delay:0s}
  .nav-toggle{display:flex}
  .hero{min-height:560px;padding:82px 0 70px;background-position:center}
  .hero-industrial{background-image:linear-gradient(180deg,rgba(6,14,23,.94),rgba(6,14,23,.82)),url('../images/products/catalog/ductile-manhole-stacks.jpg')}
  .hero .container{text-align:left}
  .hero-content p{max-width:100%}
  .hero-buttons{justify-content:flex-start}
  .hero-visual{display:block}
  .hero-badge{grid-template-columns:repeat(3,1fr);min-width:0;margin-top:28px}
  .hero-badge-item{padding:14px 12px}
  .trust-grid,.capability-grid,.order-steps,.catalog-guide-grid{grid-template-columns:1fr}
  .trust-item{border-right:none;border-bottom:1px solid rgba(255,255,255,.08)}
  .trust-item:last-child{border-bottom:none}
  .capability-band{padding:22px}
  .about-layout,.contact-layout{grid-template-columns:1fr}
  .section-heading-row,.secondary-line{grid-template-columns:1fr;gap:20px}
  .secondary-cards,.catalog-secondary{grid-template-columns:1fr 1fr}
  .modal-body{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .section{padding:50px 0}
  .about-page .section{padding:42px 0}
  .about-page .page-banner{padding:52px 0}
  .about-page .cta-banner{padding:46px 0}
  .about-page .features-grid{gap:18px}
  .customer-support-note{margin-top:24px;padding-top:22px;text-align:left}
  .line-hero,.line-hero img{min-height:360px}
  .line-hero-copy{left:22px;right:22px;bottom:24px}
}
@media(max-width:480px){
  .stats-row{grid-template-columns:1fr}
  .lang-switcher{gap:0}
  .lang-switcher button{padding:3px 6px;font-size:.72rem}
  .cat-tab{padding:10px 18px;font-size:.85rem}
  .cast-product-grid{grid-template-columns:1fr}
  .secondary-cards,.catalog-secondary{grid-template-columns:1fr}
  .hero .hero-badge{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}
  .hero-badge-item{padding:12px 8px}
  .hero-badge-item .num{font-size:1.55rem}
  .hero-badge-item .lbl{font-size:.62rem;letter-spacing:.04em}
  .catalog-lead img{min-height:250px}
  .mini-line-card,.mini-line-card img{min-height:160px}
}