/* =============================================
   林科木屋 · 主样式表
   江苏林科建筑科技有限公司
   ============================================= */

:root {
  --primary: #2c5f2e;
  --primary-light: #3d8b40;
  --primary-dark: #1a3d1b;
  --accent: #8b6914;
  --accent-light: #c49a2a;
  --text: #2d2d2d;
  --text-light: #666;
  --text-muted: #999;
  --bg: #f9f8f5;
  --bg-card: #ffffff;
  --border: #e0ddd6;
  --shadow: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-hover: 0 8px 32px rgba(0,0,0,0.14);
  --radius: 8px;
  --radius-lg: 16px;
  --transition: 0.3s ease;
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: 'PingFang SC','Microsoft YaHei',sans-serif; color: var(--text); background: var(--bg); line-height: 1.7; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ======== 通用 ======== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section { padding: 72px 0; }
.section-sm { padding: 48px 0; }
.section-title { font-size: 2rem; font-weight: 700; color: var(--primary-dark); text-align: center; margin-bottom: 12px; }
.section-sub { text-align: center; color: var(--text-light); font-size: 1rem; margin-bottom: 48px; }
.section-title::after { content: ''; display: block; width: 48px; height: 3px; background: var(--accent); margin: 12px auto 0; border-radius: 2px; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 28px; border-radius: 4px; font-size: 0.95rem; font-weight: 600; transition: var(--transition); }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-light); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(44,95,46,0.3); }
.btn-outline { border: 2px solid var(--primary); color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-accent { background: var(--accent); color: #fff; }
.btn-accent:hover { background: var(--accent-light); }
.tag { display: inline-block; padding: 3px 10px; border-radius: 20px; font-size: 0.78rem; font-weight: 600; background: var(--primary); color: #fff; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

/* ======== 顶部条 ======== */
.topbar { background: var(--primary-dark); color: rgba(255,255,255,0.75); font-size: 0.82rem; padding: 6px 0; }
.topbar .container { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 6px; }
.topbar a { color: inherit; transition: color 0.2s; }
.topbar a:hover { color: #fff; }
.topbar-left, .topbar-right { display: flex; align-items: center; gap: 20px; }
.topbar-item { display: flex; align-items: center; gap: 6px; }

/* ======== 导航 ======== */
.navbar { background: #fff; box-shadow: 0 2px 12px rgba(0,0,0,0.07); position: sticky; top: 0; z-index: 1000; }
.navbar .container { display: flex; align-items: center; justify-content: space-between; height: 55px; }
.logo { display: flex; align-items: center; }
.logo img { height: 55px; width: auto; display: block; }

.nav-menu { display: flex; align-items: center; gap: 4px; }
.nav-item { position: relative; }
.nav-link { display: block; padding: 8px 16px; font-size: 0.95rem; font-weight: 500; color: var(--text); border-radius: 4px; transition: var(--transition); white-space: nowrap; }
.nav-link:hover, .nav-link.active { color: var(--primary); background: rgba(44,95,46,0.07); }
.nav-item:hover > .dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown { position: absolute; top: 100%; left: 0; min-width: 160px; background: #fff; border-radius: var(--radius); box-shadow: var(--shadow-hover); padding: 6px 0; opacity: 0; visibility: hidden; transform: translateY(8px); transition: var(--transition); z-index: 200; }
.dropdown a { display: block; padding: 9px 20px; font-size: 0.88rem; color: var(--text); transition: var(--transition); }
.dropdown a:hover { background: rgba(44,95,46,0.07); color: var(--primary); padding-left: 26px; }
.nav-cta { margin-left: 12px; padding: 8px 20px; background: var(--primary); color: #fff; border-radius: 4px; font-size: 0.88rem; font-weight: 600; transition: var(--transition); }
.nav-cta:hover { background: var(--primary-light); }
.hamburger { display: none; flex-direction: column; gap: 5px; padding: 6px; cursor: pointer; }
.hamburger span { display: block; width: 24px; height: 2px; background: var(--text); border-radius: 2px; transition: var(--transition); }

/* ======== Hero 轮播 ======== */
.hero { position: relative; overflow: hidden; }
.hero-slider { display: flex; transition: transform 0.6s ease; }
.hero-slide { min-width: 100%; position: relative; height: 600px; }
.hero-slide img { width: 100%; height: 100%; object-fit: cover; }
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(0,0,0,0.55) 0%, rgba(0,0,0,0.2) 100%); }
.hero-content { position: absolute; inset: 0; display: flex; flex-direction: column; justify-content: center; align-items: flex-start; padding: 0 80px; color: #fff; }
.hero-tag { display: inline-block; padding: 5px 14px; border: 1px solid rgba(255,255,255,0.6); border-radius: 20px; font-size: 0.8rem; letter-spacing: 2px; margin-bottom: 20px; backdrop-filter: blur(4px); }
.hero-title { font-size: 3rem; font-weight: 800; line-height: 1.2; margin-bottom: 16px; text-shadow: 0 2px 8px rgba(0,0,0,0.3); }
.hero-desc { font-size: 1.1rem; opacity: 0.9; max-width: 500px; margin-bottom: 32px; }
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-prev, .hero-next { position: absolute; top: 50%; transform: translateY(-50%); z-index: 10; width: 44px; height: 44px; background: rgba(255,255,255,0.2); backdrop-filter: blur(4px); border: 1px solid rgba(255,255,255,0.3); border-radius: 50%; display: flex; align-items: center; justify-content: center; cursor: pointer; transition: var(--transition); color: #fff; }
.hero-prev:hover, .hero-next:hover { background: rgba(255,255,255,0.35); }
.hero-prev { left: 20px; }
.hero-next { right: 20px; }
.hero-dots { position: absolute; bottom: 20px; left: 50%; transform: translateX(-50%); display: flex; gap: 8px; }
.hero-dot { width: 8px; height: 8px; border-radius: 50%; background: rgba(255,255,255,0.5); cursor: pointer; transition: var(--transition); }
.hero-dot.active { background: #fff; width: 24px; border-radius: 4px; }

/* ======== 数字统计条 ======== */
.stats-bar { background: var(--primary); color: #fff; padding: 36px 0; }
.stats-bar .container { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; text-align: center; }
.stat-item { padding: 16px; border-right: 1px solid rgba(255,255,255,0.2); }
.stat-item:last-child { border-right: none; }
.stat-num { font-size: 2.4rem; font-weight: 800; line-height: 1; }
.stat-unit { font-size: 1rem; font-weight: 600; margin-left: 2px; }
.stat-label { font-size: 0.85rem; opacity: 0.8; margin-top: 4px; }

/* ======== 卡片通用 ======== */
.card { background: var(--bg-card); border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow); transition: var(--transition); }
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.card-img { width: 100%; height: 220px; object-fit: cover; }
.card-body { padding: 20px; }
.card-title { font-size: 1.05rem; font-weight: 700; color: var(--text); margin-bottom: 8px; line-height: 1.4; }
.card-desc { font-size: 0.88rem; color: var(--text-light); line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.card-meta { display: flex; justify-content: space-between; align-items: center; margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--border); }
.card-date { font-size: 0.8rem; color: var(--text-muted); }
.card-link { font-size: 0.85rem; color: var(--primary); font-weight: 600; display: flex; align-items: center; gap: 4px; }
.card-link:hover { gap: 8px; }

/* ======== 产品区 ======== */
.product-card .card-img { height: 240px; }
.product-card .card-body { padding: 22px; }
.product-cat { font-size: 0.78rem; color: var(--accent); font-weight: 600; text-transform: uppercase; letter-spacing: 1px; margin-bottom: 6px; }

/* ======== 案例区 ======== */
.case-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 2px; }
.case-item { position: relative; overflow: hidden; aspect-ratio: 4/3; cursor: pointer; }
.case-item img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.case-item:hover img { transform: scale(1.08); }
.case-overlay { position: absolute; inset: 0; background: linear-gradient(to top, rgba(0,0,0,0.7) 0%, transparent 60%); opacity: 0; transition: opacity 0.3s; display: flex; flex-direction: column; justify-content: flex-end; padding: 20px; color: #fff; }
.case-item:hover .case-overlay { opacity: 1; }
.case-title { font-size: 0.95rem; font-weight: 700; }
.case-sub { font-size: 0.8rem; opacity: 0.8; margin-top: 4px; }

/* ======== 优势区 ======== */
.advantage-bg { background: linear-gradient(135deg, #f0f4f0 0%, #e8f0e8 100%); }
.advantage-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 24px; }
.advantage-item { background: #fff; border-radius: var(--radius-lg); padding: 32px 24px; text-align: center; box-shadow: var(--shadow); transition: var(--transition); border-bottom: 3px solid transparent; }
.advantage-item:hover { border-bottom-color: var(--primary); transform: translateY(-4px); }
.advantage-icon { width: 64px; height: 64px; background: linear-gradient(135deg, var(--primary), var(--primary-light)); border-radius: 16px; display: flex; align-items: center; justify-content: center; margin: 0 auto 16px; }
.advantage-icon svg { width: 32px; height: 32px; fill: #fff; }
.advantage-title { font-size: 1.05rem; font-weight: 700; color: var(--text); margin-bottom: 10px; }
.advantage-desc { font-size: 0.88rem; color: var(--text-light); line-height: 1.6; }

/* ======== 新闻区 ======== */
.news-card { display: flex; gap: 20px; background: var(--bg-card); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); transition: var(--transition); }
.news-card:hover { transform: translateX(4px); box-shadow: var(--shadow-hover); }
.news-date-box { flex-shrink: 0; width: 60px; text-align: center; background: var(--primary); color: #fff; border-radius: 8px; padding: 10px 6px; }
.news-day { font-size: 1.6rem; font-weight: 800; line-height: 1; }
.news-month { font-size: 0.72rem; margin-top: 2px; opacity: 0.85; }
.news-body { flex: 1; min-width: 0; }
.news-tag { font-size: 0.75rem; color: var(--accent); font-weight: 600; margin-bottom: 5px; }
.news-title { font-size: 0.95rem; font-weight: 700; color: var(--text); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 6px; }
.news-desc { font-size: 0.82rem; color: var(--text-light); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* ======== CTA Banner ======== */
.cta-banner { background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%); color: #fff; padding: 72px 0; text-align: center; }
.cta-banner h2 { font-size: 2.2rem; font-weight: 800; margin-bottom: 14px; }
.cta-banner p { font-size: 1.05rem; opacity: 0.85; margin-bottom: 36px; max-width: 600px; margin-left: auto; margin-right: auto; }
.cta-banner .btn-outline { border-color: rgba(255,255,255,0.7); color: #fff; }
.cta-banner .btn-outline:hover { background: rgba(255,255,255,0.15); }
.cta-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ======== 页脚 ======== */
footer { background: #1a1a1a; color: rgba(255,255,255,0.75); }
.footer-main { padding: 60px 0 40px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 48px; }
.footer-brand .logo-cn { color: #fff; }
.footer-brand .logo-en { color: rgba(255,255,255,0.4); }
.footer-intro { font-size: 0.87rem; line-height: 1.8; margin-top: 16px; opacity: 0.7; }
.footer-title { font-size: 0.95rem; font-weight: 700; color: #fff; margin-bottom: 18px; position: relative; padding-bottom: 10px; }
.footer-title::after { content: ''; position: absolute; bottom: 0; left: 0; width: 24px; height: 2px; background: var(--accent); }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { font-size: 0.87rem; transition: var(--transition); }
.footer-links a:hover { color: #fff; padding-left: 6px; }
.footer-contact-item { display: flex; gap: 10px; margin-bottom: 14px; font-size: 0.87rem; }
.footer-contact-item svg { flex-shrink: 0; width: 16px; height: 16px; fill: var(--accent-light); margin-top: 3px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding: 20px 0; }
.footer-bottom .container { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px; font-size: 0.82rem; opacity: 0.6; }

/* ======== 内页 Banner ======== */
.page-banner { position: relative; height: 260px; background: linear-gradient(135deg, var(--primary-dark), var(--primary)); display: flex; align-items: center; overflow: hidden; }
.page-banner::before { content: ''; position: absolute; right: -60px; top: -60px; width: 400px; height: 400px; border-radius: 50%; background: rgba(255,255,255,0.04); }
.page-banner .container { position: relative; z-index: 1; }
.page-banner h1 { font-size: 2.4rem; font-weight: 800; color: #fff; margin-bottom: 12px; }
.breadcrumb { display: flex; align-items: center; gap: 8px; color: rgba(255,255,255,0.6); font-size: 0.87rem; }
.breadcrumb a { color: rgba(255,255,255,0.7); }
.breadcrumb a:hover { color: #fff; }
.breadcrumb span { opacity: 0.5; }

/* ======== 产品列表页 ======== */
.sidebar { width: 240px; flex-shrink: 0; }
.sidebar-box { background: var(--bg-card); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.sidebar-title { background: var(--primary); color: #fff; padding: 14px 20px; font-weight: 700; font-size: 0.95rem; }
.sidebar-links a { display: flex; align-items: center; padding: 12px 20px; font-size: 0.9rem; border-bottom: 1px solid var(--border); transition: var(--transition); }
.sidebar-links a::before { content: '›'; margin-right: 8px; color: var(--text-muted); transition: var(--transition); }
.sidebar-links a:hover, .sidebar-links a.active { background: rgba(44,95,46,0.07); color: var(--primary); padding-left: 26px; }
.sidebar-links a:hover::before, .sidebar-links a.active::before { color: var(--primary); }
.content-area { display: flex; gap: 32px; }
.main-content { flex: 1; min-width: 0; }
.product-list { display: grid; grid-template-columns: repeat(2,1fr); gap: 24px; }
.product-list .card-img { height: 200px; }

/* ======== 详情页 ======== */
.detail-wrap { background: var(--bg-card); border-radius: var(--radius-lg); box-shadow: var(--shadow); overflow: hidden; }
.detail-img { width: 100%; max-height: 480px; object-fit: cover; }
.detail-body { padding: 36px; }
.detail-title { font-size: 1.8rem; font-weight: 800; color: var(--text); margin-bottom: 16px; }
.detail-meta { display: flex; gap: 20px; flex-wrap: wrap; margin-bottom: 24px; padding-bottom: 24px; border-bottom: 1px solid var(--border); }
.detail-meta-item { display: flex; align-items: center; gap: 6px; font-size: 0.85rem; color: var(--text-muted); }
.article-content { font-size: 0.97rem; line-height: 1.9; color: var(--text); }
.article-content p { margin-bottom: 16px; }
.article-content img { border-radius: 8px; margin: 16px 0; }
.article-content h2, .article-content h3 { color: var(--primary-dark); margin: 24px 0 12px; font-weight: 700; }
.article-content strong { color: var(--text); }

/* ======== 新闻列表 ======== */
.news-list { display: flex; flex-direction: column; gap: 20px; }
.news-list-item { display: flex; gap: 24px; background: var(--bg-card); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); transition: var(--transition); }
.news-list-item:hover { transform: translateX(4px); box-shadow: var(--shadow-hover); }
.news-list-img { width: 220px; flex-shrink: 0; }
.news-list-img img { width: 100%; height: 100%; object-fit: cover; }
.news-list-body { padding: 24px; flex: 1; display: flex; flex-direction: column; justify-content: space-between; }
.news-list-title { font-size: 1.1rem; font-weight: 700; margin-bottom: 10px; line-height: 1.4; }
.news-list-title:hover { color: var(--primary); }
.news-list-desc { font-size: 0.88rem; color: var(--text-light); display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.news-list-footer { display: flex; justify-content: space-between; align-items: center; margin-top: 16px; }

/* ======== 关于我们 ======== */
.about-split { display: block; }
.about-img { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-hover); }
.about-img img { width: 100%; height: 400px; object-fit: cover; }
.about-text h2 { font-size: 2rem; font-weight: 800; color: var(--primary-dark); margin-bottom: 20px; }
.about-text p { font-size: 1rem; color: var(--text-light); line-height: 2; margin-bottom: 18px; max-width: 900px; }
.about-highlights { display: grid; grid-template-columns: repeat(2,1fr); gap: 16px; margin-top: 24px; }
.highlight-item { display: flex; align-items: flex-start; gap: 12px; padding: 16px; background: rgba(44,95,46,0.05); border-radius: 8px; }
.highlight-icon { width: 36px; height: 36px; background: var(--primary); border-radius: 8px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.highlight-icon svg { width: 18px; height: 18px; fill: #fff; }
.highlight-text strong { display: block; font-size: 0.9rem; color: var(--text); margin-bottom: 2px; }
.highlight-text span { font-size: 0.82rem; color: var(--text-light); }

/* ======== 联系我们 ======== */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 48px; }
.contact-info { display: flex; flex-direction: column; gap: 20px; }
.contact-card { background: var(--bg-card); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); display: flex; gap: 16px; align-items: flex-start; }
.contact-icon { width: 48px; height: 48px; background: var(--primary); border-radius: 12px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.contact-icon svg { width: 24px; height: 24px; fill: #fff; }
.contact-card-title { font-weight: 700; color: var(--text); margin-bottom: 4px; }
.contact-card-value { color: var(--text-light); font-size: 0.92rem; }
.contact-form { background: var(--bg-card); border-radius: var(--radius-lg); padding: 36px; box-shadow: var(--shadow); }
.contact-form h3 { font-size: 1.3rem; font-weight: 700; margin-bottom: 24px; color: var(--text); }
.form-group { margin-bottom: 18px; }
.form-label { display: block; font-size: 0.88rem; font-weight: 600; color: var(--text); margin-bottom: 6px; }
.form-input, .form-textarea, .form-select { width: 100%; padding: 11px 14px; border: 1.5px solid var(--border); border-radius: 6px; font-size: 0.92rem; font-family: inherit; color: var(--text); background: var(--bg); transition: var(--transition); }
.form-input:focus, .form-textarea:focus, .form-select:focus { outline: none; border-color: var(--primary); background: #fff; }
.form-textarea { min-height: 120px; resize: vertical; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-submit { width: 100%; padding: 14px; background: var(--primary); color: #fff; border-radius: 6px; font-size: 1rem; font-weight: 700; transition: var(--transition); }
.form-submit:hover { background: var(--primary-light); }

/* ======== 案例列表 ======== */
.filter-tabs { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 36px; }
.filter-tab { padding: 8px 20px; border-radius: 20px; font-size: 0.88rem; font-weight: 600; border: 1.5px solid var(--border); color: var(--text-light); cursor: pointer; transition: var(--transition); }
.filter-tab:hover, .filter-tab.active { background: var(--primary); border-color: var(--primary); color: #fff; }
.cases-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.case-card { cursor: pointer; }
.case-card .card-img { height: 200px; }
.case-tag-row { display: flex; gap: 6px; margin-bottom: 8px; flex-wrap: wrap; }

/* ======== 分页 ======== */
.pagination { display: flex; justify-content: center; gap: 8px; margin-top: 48px; }
.page-btn { width: 38px; height: 38px; border-radius: 6px; display: flex; align-items: center; justify-content: center; font-size: 0.88rem; font-weight: 600; border: 1.5px solid var(--border); color: var(--text-light); transition: var(--transition); cursor: pointer; }
.page-btn:hover, .page-btn.active { background: var(--primary); border-color: var(--primary); color: #fff; }

/* ======== 回顶 ======== */
.back-top { position: fixed; right: 24px; bottom: 80px; width: 44px; height: 44px; background: var(--primary); color: #fff; border-radius: 50%; display: flex; align-items: center; justify-content: center; cursor: pointer; box-shadow: 0 4px 16px rgba(44,95,46,0.35); transition: var(--transition); opacity: 0; visibility: hidden; z-index: 999; }
.back-top.show { opacity: 1; visibility: visible; }
.back-top:hover { background: var(--primary-light); transform: translateY(-3px); }
.back-top svg { width: 20px; height: 20px; fill: #fff; }

/* ======== 响应式 ======== */
@media (max-width: 1024px) {
  .hero-title { font-size: 2.4rem; }
  .hero-content { padding: 0 48px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
  .advantage-grid { grid-template-columns: repeat(2,1fr); }
  .stats-bar .container { grid-template-columns: repeat(2,1fr); }
}

@media (max-width: 768px) {
  .topbar { display: none; }
  .hamburger { display: flex; }
  .nav-menu { display: none; position: fixed; inset: 70px 0 0; background: #fff; flex-direction: column; align-items: stretch; padding: 20px; overflow-y: auto; gap: 4px; box-shadow: 0 10px 40px rgba(0,0,0,0.1); }
  .nav-menu.open { display: flex; }
  .nav-cta { display: none; }
  .dropdown { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; background: rgba(44,95,46,0.04); border-radius: 6px; padding: 4px 0; margin-top: 4px; }
  .hero-slide { height: 420px; }
  .hero-content { padding: 0 24px; }
  .hero-title { font-size: 1.8rem; }
  .hero-desc { font-size: 0.92rem; }
  .section { padding: 48px 0; }
  .section-title { font-size: 1.5rem; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .about-split { grid-template-columns: 1fr; gap: 32px; }
  .contact-grid { grid-template-columns: 1fr; }
  .content-area { flex-direction: column; }
  .sidebar { width: 100%; }
  .product-list { grid-template-columns: 1fr; }
  .cases-grid { grid-template-columns: repeat(2,1fr); }
  .news-list-item { flex-direction: column; }
  .news-list-img { width: 100%; height: 200px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .stats-bar .container { grid-template-columns: repeat(2,1fr); }
  .hero-btns { flex-direction: column; gap: 10px; }
  .case-grid { grid-template-columns: 1fr 1fr; }
  .advantage-grid { grid-template-columns: 1fr 1fr; }
  .about-highlights { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .hero-slide { height: 320px; }
  .hero-title { font-size: 1.4rem; }
  .cases-grid { grid-template-columns: 1fr; }
  .case-grid { grid-template-columns: 1fr; }
  .stats-bar .container { grid-template-columns: 1fr 1fr; }
  .advantage-grid { grid-template-columns: 1fr; }
  .filter-tabs { gap: 8px; }
}