/* ============================================================
   恒达彩钢板业 — 全站样式
   ============================================================ */

@font-face {
  font-family: 'Noto Sans SC';
  src: url('../fonts/NotoSansSC-Regular.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Noto Sans SC';
  src: url('../fonts/NotoSansSC-Bold.woff2') format('woff2');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

:root {
  --c-brand: #0E3A6D;
  --c-brand-deep: #0A2B4E;
  --c-brand-light: #1B4F8F;
  --c-blue: #4D8FE0;
  --c-accent: #F2A93B;
  --c-accent-deep: #D98A1B;
  --c-bg: #F5F7FA;
  --c-card: #FFFFFF;
  --c-text: #1F2A37;
  --c-muted: #5B6B7E;
  --c-line: #E2E8F0;
  --shadow-sm: 0 2px 10px rgba(10, 43, 78, 0.06);
  --shadow-md: 0 10px 28px rgba(10, 43, 78, 0.10);
  --radius: 10px;
  --font: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

.container { width: min(1200px, 92%); margin: 0 auto; }

.section { padding: 84px 0; }
.section-alt { background: #fff; }

/* ---------- 区块标题 ---------- */
.sec-head { max-width: 720px; margin-bottom: 48px; }
.sec-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.sec-kicker {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--c-accent-deep); font-size: 14px; font-weight: 700;
  letter-spacing: 0.12em;
}
.sec-kicker::before {
  content: ""; width: 22px; height: 3px; border-radius: 2px;
  background: var(--c-accent); display: inline-block;
}
.sec-head.center .sec-kicker::after {
  content: ""; width: 22px; height: 3px; border-radius: 2px;
  background: var(--c-accent); display: inline-block;
}
.sec-title { font-size: 34px; font-weight: 700; color: var(--c-brand); margin: 10px 0 12px; line-height: 1.35; }
.sec-sub { color: var(--c-muted); font-size: 15px; }

/* ---------- 顶栏 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: #fff; border-bottom: 1px solid var(--c-line);
  transition: box-shadow .25s ease;
}
.site-header.scrolled { box-shadow: 0 6px 20px rgba(10, 43, 78, 0.08); }
.header-inner { display: flex; align-items: center; gap: 28px; height: 76px; }

.logo { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.logo-mark { width: 44px; height: 44px; display: block; }
.logo-text { display: flex; flex-direction: column; line-height: 1.2; }
.logo-name { font-size: 24px; font-weight: 700; color: var(--c-brand); letter-spacing: 0.06em; }
.logo-en { font-size: 11px; color: var(--c-muted); letter-spacing: 0.14em; text-transform: uppercase; }

.main-nav { display: flex; align-items: center; gap: 6px; margin-left: auto; }
.main-nav a {
  position: relative; padding: 8px 14px; font-size: 15px; color: var(--c-text);
  border-radius: 6px; transition: color .2s ease, background .2s ease;
}
.main-nav a:hover { color: var(--c-brand); background: #F0F4FA; }
.main-nav a.active { color: var(--c-brand); font-weight: 700; }
.main-nav a.active::after {
  content: ""; position: absolute; left: 14px; right: 14px; bottom: 2px;
  height: 3px; border-radius: 2px; background: var(--c-accent);
}

.header-tel { display: flex; align-items: center; gap: 8px; color: var(--c-brand); font-weight: 700; font-size: 17px; white-space: nowrap; }
.header-tel svg { width: 20px; height: 20px; fill: var(--c-accent-deep); }

.nav-toggle { display: none; width: 42px; height: 42px; border: 0; background: none; cursor: pointer; flex-direction: column; justify-content: center; align-items: center; gap: 5px; }
.nav-toggle span { width: 24px; height: 2px; background: var(--c-brand); border-radius: 2px; transition: transform .25s ease, opacity .25s ease; }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- 首页 Hero ---------- */
.hero {
  position: relative; min-height: 560px; display: flex; flex-direction: column; justify-content: center;
  color: #fff; overflow: hidden; background: var(--c-brand-deep);
}
.hero-bg { position: absolute; inset: 0; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; }
.hero-bg::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(100deg, rgba(8, 32, 60, 0.88) 0%, rgba(10, 43, 78, 0.62) 46%, rgba(10, 43, 78, 0.18) 100%);
}
.hero-inner { position: relative; z-index: 2; padding: 110px 0; }
.hero-tag {
  display: inline-flex; align-items: center; gap: 8px;
  border: 1px solid rgba(255, 255, 255, 0.35); background: rgba(255, 255, 255, 0.10);
  padding: 6px 14px; border-radius: 999px; font-size: 13px; letter-spacing: 0.08em;
}
.hero-title { font-size: 48px; font-weight: 700; line-height: 1.3; margin: 22px 0 18px; letter-spacing: 0.02em; }
.hero-title em { font-style: normal; color: var(--c-accent); }
.hero-desc { max-width: 560px; font-size: 16px; color: rgba(255, 255, 255, 0.88); margin-bottom: 34px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 28px; border-radius: 6px; font-size: 15px; font-weight: 700;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.btn-accent { background: var(--c-accent); color: #fff; box-shadow: 0 8px 20px rgba(242, 169, 59, 0.35); }
.btn-accent:hover { background: var(--c-accent-deep); transform: translateY(-2px); }
.btn-ghost { border: 1px solid rgba(255, 255, 255, 0.6); color: #fff; background: rgba(255, 255, 255, 0.06); }
.btn-ghost:hover { background: rgba(255, 255, 255, 0.16); transform: translateY(-2px); }
.btn-brand { background: var(--c-brand); color: #fff; box-shadow: 0 8px 20px rgba(14, 58, 109, 0.28); }
.btn-brand:hover { background: var(--c-brand-light); transform: translateY(-2px); }

.hero-stats {
  position: relative; z-index: 2; background: #fff; border-radius: var(--radius);
  box-shadow: var(--shadow-md); margin-top: 56px;
  display: grid; grid-template-columns: repeat(4, 1fr);
}
.stat { padding: 26px 16px; text-align: center; border-right: 1px solid var(--c-line); }
.stat:last-child { border-right: 0; }
.stat-num { font-size: 34px; font-weight: 700; color: var(--c-brand); line-height: 1.2; }
.stat-num small { font-size: 18px; color: var(--c-accent-deep); }
.stat-label { font-size: 13px; color: var(--c-muted); margin-top: 6px; }

/* ---------- 首页：简介 ---------- */
.about-split { display: grid; grid-template-columns: 1.05fr 1fr; gap: 56px; align-items: center; }
.about-imgs { position: relative; }
.about-imgs .img-main { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-md); }
.about-imgs .img-sub {
  position: absolute; right: -18px; bottom: -24px; width: 46%;
  border-radius: var(--radius); overflow: hidden; border: 6px solid #fff; box-shadow: var(--shadow-md);
}
.about-imgs img { width: 100%; height: 100%; object-fit: cover; }
.about-imgs .img-main { aspect-ratio: 4 / 3; }
.about-imgs .img-sub { aspect-ratio: 4 / 3; }
.about-copy h2 { font-size: 30px; color: var(--c-brand); line-height: 1.4; margin: 12px 0 18px; }
.about-copy p { color: var(--c-muted); margin-bottom: 14px; font-size: 15px; }
.about-points { margin: 20px 0 28px; display: grid; grid-template-columns: 1fr 1fr; gap: 12px 20px; }
.about-points li { display: flex; gap: 10px; align-items: flex-start; font-size: 14.5px; color: var(--c-text); }
.about-points svg { width: 18px; height: 18px; fill: var(--c-accent-deep); flex-shrink: 0; margin-top: 4px; }

/* ---------- 卡片网格 ---------- */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }

.card { background: var(--c-card); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); transition: transform .25s ease, box-shadow .25s ease; display: flex; flex-direction: column; }
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.card-media { position: relative; overflow: hidden; aspect-ratio: 4 / 3; }
.card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.card:hover .card-media img { transform: scale(1.06); }
.card-media .card-tag {
  position: absolute; left: 14px; top: 14px; background: var(--c-brand); color: #fff;
  font-size: 12px; padding: 4px 12px; border-radius: 999px; letter-spacing: 0.05em;
}
.card-body { padding: 20px 22px 24px; display: flex; flex-direction: column; flex: 1; }
.card-body h3 { font-size: 18px; color: var(--c-brand); margin-bottom: 8px; line-height: 1.45; }
.card-body p { font-size: 14px; color: var(--c-muted); flex: 1; }
.card-meta { display: flex; gap: 16px; font-size: 12.5px; color: var(--c-muted); margin-top: 14px; }
.card-meta span { display: inline-flex; align-items: center; gap: 5px; }
.card-meta svg { width: 14px; height: 14px; fill: var(--c-blue); }
.card-link { margin-top: 16px; display: inline-flex; align-items: center; gap: 6px; color: var(--c-brand); font-size: 14px; font-weight: 700; }
.card-link svg { width: 15px; height: 15px; fill: currentColor; transition: transform .2s ease; }
.card:hover .card-link svg { transform: translateX(4px); }

.sec-cta { margin-top: 44px; text-align: center; }

/* ---------- 首页：优势 ---------- */
.adv-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.adv-item { background: var(--c-card); border-radius: var(--radius); padding: 30px 26px; box-shadow: var(--shadow-sm); border-top: 3px solid var(--c-blue); transition: transform .25s ease; }
.adv-item:nth-child(2) { border-top-color: var(--c-accent); }
.adv-item:nth-child(3) { border-top-color: var(--c-brand-light); }
.adv-item:nth-child(4) { border-top-color: #6FA8DC; }
.adv-item:hover { transform: translateY(-5px); }
.adv-icon { width: 52px; height: 52px; border-radius: 12px; background: #EAF1FB; display: flex; align-items: center; justify-content: center; margin-bottom: 18px; }
.adv-icon svg { width: 28px; height: 28px; fill: var(--c-brand); }
.adv-item h3 { font-size: 17px; color: var(--c-brand); margin-bottom: 10px; }
.adv-item p { font-size: 13.5px; color: var(--c-muted); }

/* ---------- 内页横幅 ---------- */
.page-banner { position: relative; color: #fff; overflow: hidden; background: var(--c-brand-deep); }
.page-banner .banner-bg { position: absolute; inset: 0; }
.page-banner .banner-bg img { width: 100%; height: 100%; object-fit: cover; }
.page-banner .banner-bg::after { content: ""; position: absolute; inset: 0; background: rgba(8, 32, 60, 0.72); }
.banner-inner { position: relative; z-index: 2; padding: 76px 0; }
.banner-title { font-size: 36px; font-weight: 700; letter-spacing: 0.03em; }
.banner-sub { color: rgba(255, 255, 255, 0.82); margin-top: 10px; font-size: 15px; }
.breadcrumb { margin-top: 18px; font-size: 13px; color: rgba(255, 255, 255, 0.75); display: flex; gap: 8px; align-items: center; }
.breadcrumb a:hover { color: var(--c-accent); }
.breadcrumb svg { width: 13px; height: 13px; fill: rgba(255, 255, 255, 0.5); }

/* ---------- 产品页 ---------- */
.prod-block { display: grid; grid-template-columns: 42% 1fr; gap: 44px; align-items: center; }
.prod-block + .prod-block { margin-top: 64px; padding-top: 64px; border-top: 1px solid var(--c-line); }
.prod-block:nth-child(even) .prod-media { order: 2; }
.prod-media { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-md); aspect-ratio: 1 / 1; }
.prod-media img { width: 100%; height: 100%; object-fit: cover; }
.prod-info h3 { font-size: 26px; color: var(--c-brand); margin-bottom: 10px; }
.prod-info .prod-en { font-size: 13px; color: var(--c-blue); letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 14px; }
.prod-info p { color: var(--c-muted); font-size: 14.5px; margin-bottom: 20px; }
.spec-table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.spec-table th, .spec-table td { text-align: left; padding: 10px 14px; border: 1px solid var(--c-line); }
.spec-table th { background: #F0F4FA; color: var(--c-brand); font-weight: 700; width: 34%; }
.spec-table td { background: #fff; color: var(--c-text); }

/* ---------- 案例页筛选 ---------- */
.filter-bar { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 36px; }
.filter-btn {
  border: 1px solid var(--c-line); background: #fff; color: var(--c-muted);
  padding: 8px 20px; border-radius: 999px; font-size: 14px; cursor: pointer;
  transition: all .2s ease;
}
.filter-btn:hover { border-color: var(--c-brand); color: var(--c-brand); }
.filter-btn.active { background: var(--c-brand); border-color: var(--c-brand); color: #fff; font-weight: 700; }
.case-card .case-foot {
  margin-top: 16px; padding-top: 14px; border-top: 1px dashed var(--c-line);
  display: flex; justify-content: space-between; font-size: 13px; color: var(--c-muted);
}
.hidden-card { display: none !important; }

/* ---------- 新闻页 ---------- */
.news-item {
  background: #fff; border-radius: var(--radius); box-shadow: var(--shadow-sm);
  border-left: 4px solid var(--c-blue); margin-bottom: 18px; overflow: hidden;
}
.news-item:nth-child(even) { border-left-color: var(--c-accent); }
.news-head { display: flex; align-items: center; gap: 20px; padding: 22px 26px; cursor: pointer; }
.news-date { text-align: center; flex-shrink: 0; width: 68px; padding: 8px 0; background: #F0F4FA; border-radius: 8px; }
.news-date .d { font-size: 24px; font-weight: 700; color: var(--c-brand); line-height: 1.1; }
.news-date .m { font-size: 12px; color: var(--c-muted); }
.news-tit { flex: 1; font-size: 17px; color: var(--c-text); font-weight: 700; line-height: 1.5; }
.news-head .arrow { width: 16px; height: 16px; fill: var(--c-muted); flex-shrink: 0; transition: transform .25s ease; }
.news-item.open .news-head .arrow { transform: rotate(90deg); }
.news-body { display: none; padding: 4px 26px 26px; color: var(--c-muted); font-size: 14.5px; }
.news-item.open .news-body { display: block; }
.news-body p { margin-bottom: 12px; }

/* ---------- 关于页：时间轴 ---------- */
.timeline { position: relative; max-width: 900px; margin: 0 auto; padding-left: 0; }
.timeline::before { content: ""; position: absolute; left: 50%; top: 0; bottom: 0; width: 3px; background: linear-gradient(180deg, var(--c-blue), var(--c-accent)); transform: translateX(-50%); border-radius: 2px; }
.tl-item { position: relative; width: 50%; padding-right: 48px; text-align: right; }
.tl-item:nth-child(even) { margin-left: 50%; padding-right: 0; padding-left: 48px; text-align: left; }
.tl-dot {
  position: absolute; top: 8px; width: 16px; height: 16px; border-radius: 50%;
  background: #fff; border: 4px solid var(--c-brand); right: -8px;
}
.tl-item:nth-child(even) .tl-dot { right: auto; left: -8px; }
.tl-year { font-size: 26px; font-weight: 700; color: var(--c-brand); }
.tl-title { font-weight: 700; color: var(--c-text); margin: 4px 0 8px; }
.tl-desc { font-size: 13.5px; color: var(--c-muted); }
.tl-item { padding-bottom: 40px; }

/* ---------- 资质荣誉 ---------- */
.honor-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.honor-item { background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); padding: 26px; display: flex; gap: 16px; align-items: flex-start; transition: box-shadow .25s ease, transform .25s ease; }
.honor-item:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.honor-badge { width: 46px; height: 46px; border-radius: 12px; background: #EAF1FB; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.honor-badge svg { width: 26px; height: 26px; fill: var(--c-brand); }
.honor-item h3 { font-size: 16px; color: var(--c-brand); margin-bottom: 6px; }
.honor-item p { font-size: 13px; color: var(--c-muted); }

/* ---------- 企业文化 ---------- */
.mv-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.mv-item { background: #fff; border-radius: var(--radius); box-shadow: var(--shadow-sm); padding: 34px 28px; text-align: center; }
.mv-item .mv-num { font-size: 13px; color: var(--c-accent-deep); font-weight: 700; letter-spacing: 0.15em; }
.mv-item h3 { font-size: 19px; color: var(--c-brand); margin: 10px 0 12px; }
.mv-item p { font-size: 14px; color: var(--c-muted); }
.values-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-top: 24px; }
.value-item { background: #F0F4FA; border-radius: 10px; padding: 20px 16px; text-align: center; }
.value-item h4 { color: var(--c-brand); font-size: 15px; margin-bottom: 6px; }
.value-item p { font-size: 12.5px; color: var(--c-muted); }

/* ---------- 联系我们 ---------- */
.contact-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }
.contact-card { background: #fff; border-radius: var(--radius); box-shadow: var(--shadow-sm); padding: 34px 30px; display: flex; gap: 20px; }
.contact-icon { width: 54px; height: 54px; border-radius: 14px; background: #EAF1FB; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.contact-icon svg { width: 28px; height: 28px; fill: var(--c-brand); }
.contact-card h3 { font-size: 17px; color: var(--c-brand); margin-bottom: 10px; }
.contact-card p { font-size: 14.5px; color: var(--c-muted); }
.contact-card a:hover { color: var(--c-brand); }
.route-panel { margin-top: 26px; background: #fff; border-radius: var(--radius); box-shadow: var(--shadow-sm); padding: 30px; }
.route-panel h3 { font-size: 17px; color: var(--c-brand); margin-bottom: 16px; }
.route-panel li { font-size: 14px; color: var(--c-muted); margin-bottom: 10px; display: flex; gap: 10px; }
.route-panel li::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--c-accent); margin-top: 8px; flex-shrink: 0; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--c-brand-deep); color: rgba(255, 255, 255, 0.75); margin-top: 0; }
.footer-main { display: grid; grid-template-columns: 1.3fr 1fr 1fr 1.2fr; gap: 40px; padding: 64px 0 48px; }
.footer-logo .logo-name { color: #fff; }
.footer-logo .logo-en { color: rgba(255, 255, 255, 0.55); }
.footer-desc { font-size: 13.5px; margin-top: 16px; line-height: 1.9; }
.footer-col h4 { color: #fff; font-size: 16px; margin-bottom: 18px; position: relative; padding-bottom: 10px; }
.footer-col h4::after { content: ""; position: absolute; left: 0; bottom: 0; width: 26px; height: 3px; border-radius: 2px; background: var(--c-accent); }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a { font-size: 14px; color: rgba(255, 255, 255, 0.7); transition: color .2s ease; }
.footer-col ul a:hover { color: var(--c-accent); }
.footer-contact li { display: flex; gap: 10px; font-size: 13.5px; margin-bottom: 12px; align-items: flex-start; }
.footer-contact svg { width: 16px; height: 16px; fill: var(--c-accent); flex-shrink: 0; margin-top: 5px; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, 0.12); padding: 20px 0; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; font-size: 13px; color: rgba(255, 255, 255, 0.5); }

/* ---------- 返回顶部 ---------- */
.back-top {
  position: fixed; right: 26px; bottom: 30px; z-index: 90;
  width: 46px; height: 46px; border-radius: 50%; border: 0; cursor: pointer;
  background: var(--c-brand); color: #fff; display: flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow-md); opacity: 0; visibility: hidden; transform: translateY(10px);
  transition: all .3s ease;
}
.back-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-top:hover { background: var(--c-brand-light); }
.back-top svg { width: 20px; height: 20px; fill: #fff; }

/* ---------- 动效 ---------- */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  * { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .section { padding: 64px 0; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .about-split { grid-template-columns: 1fr; gap: 44px; }
  .about-imgs .img-sub { right: 12px; }
  .hero-title { font-size: 40px; }
  .footer-main { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 820px) {
  .header-inner { height: 68px; gap: 12px; }
  .header-tel { display: none; }
  .nav-toggle { display: flex; }
  .main-nav {
    position: fixed; inset: 68px 0 auto 0; background: #fff; border-bottom: 1px solid var(--c-line);
    flex-direction: column; align-items: stretch; gap: 0; padding: 8px 5vw 18px;
    box-shadow: 0 16px 24px rgba(10, 43, 78, 0.08);
    transform: translateY(-8px); opacity: 0; visibility: hidden; transition: all .25s ease;
  }
  .main-nav.open { transform: none; opacity: 1; visibility: visible; }
  .main-nav a { padding: 13px 10px; font-size: 16px; border-bottom: 1px solid var(--c-line); border-radius: 0; }
  .main-nav a.active::after { display: none; }
  .main-nav a.active { color: var(--c-brand); background: #F0F4FA; }
  .hero { min-height: 0; }
  .hero-inner { padding: 84px 0; }
  .hero-title { font-size: 32px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); margin-top: 40px; }
  .stat { border-bottom: 1px solid var(--c-line); }
  .stat:nth-child(2n) { border-right: 0; }
  .grid-3 { grid-template-columns: 1fr; }
  .sec-title { font-size: 27px; }
  .prod-block { grid-template-columns: 1fr; gap: 26px; }
  .prod-block:nth-child(even) .prod-media { order: 0; }
  .prod-block + .prod-block { margin-top: 48px; padding-top: 48px; }
  .honor-grid { grid-template-columns: 1fr; }
  .mv-grid { grid-template-columns: 1fr; }
  .values-row { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .timeline::before { left: 8px; }
  .tl-item, .tl-item:nth-child(even) { width: 100%; margin-left: 0; padding-left: 36px; padding-right: 0; text-align: left; }
  .tl-dot, .tl-item:nth-child(even) .tl-dot { left: 0; right: auto; }
  .banner-inner { padding: 56px 0; }
  .banner-title { font-size: 28px; }
  .news-head { flex-wrap: wrap; padding: 18px 18px; }
  .news-date { order: 2; }
  .news-tit { order: 1; flex-basis: 100%; }
  .news-head .arrow { order: 3; }
  .news-body { padding: 4px 18px 20px; }
  .about-points { grid-template-columns: 1fr; }
}

@media (max-width: 520px) {
  .grid-4 { grid-template-columns: 1fr; }
  .adv-grid { grid-template-columns: 1fr; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .stat-num { font-size: 26px; }
  .footer-main { grid-template-columns: 1fr; }
  .footer-bottom { justify-content: center; text-align: center; }
  .filter-bar { gap: 8px; }
  .filter-btn { padding: 6px 14px; font-size: 13px; }
  .contact-card { padding: 24px 20px; flex-direction: column; gap: 14px; }
}