:root {
  --brand: #1a6b5a;
  --brand-dark: #124a3e;
  --brand-light: #e8f3ef;
  --accent: #e8a13c;
  --ink: #16232e;
  --ink-soft: #4a5a66;
  --bg: #ffffff;
  --bg-alt: #f5f8f7;
  --line: #e2e9e6;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(20, 40, 35, 0.08);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: 'Inter', -apple-system, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif; color: var(--ink); line-height: 1.65; -webkit-font-smoothing: antialiased; }
a { text-decoration: none; color: inherit; }
.container { max-width: 1140px; margin: 0 auto; padding: 0 24px; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,0.92); backdrop-filter: blur(12px); border-bottom: 1px solid var(--line); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: 20px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.05rem; }
.brand-mark { width: 36px; height: 36px; border-radius: 10px; background: linear-gradient(135deg, var(--brand), var(--brand-dark)); color: #fff; font-weight: 800; font-size: 1.1rem; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.main-nav { display: flex; gap: 26px; flex-wrap: wrap; }
.main-nav a { color: var(--ink-soft); font-weight: 500; font-size: 0.95rem; transition: color .2s; }
.main-nav a:hover, .main-nav a.active { color: var(--brand); }
.header-right { display: flex; align-items: center; gap: 14px; }
.lang-toggle { color: var(--ink-soft); font-weight: 600; font-size: 0.9rem; padding: 8px 12px; border: 1px solid var(--line); border-radius: 999px; transition: all .2s; }
.lang-toggle:hover { border-color: var(--brand); color: var(--brand); }

/* Buttons */
.btn { display: inline-block; padding: 12px 24px; border-radius: 999px; font-weight: 600; font-size: 0.95rem; cursor: pointer; border: none; transition: all .2s; }
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-dark); transform: translateY(-1px); }
.btn-ghost { background: transparent; color: #fff; border: 1.5px solid rgba(255,255,255,0.5); }
.btn-ghost:hover { background: rgba(255,255,255,0.12); }
.btn-lg { padding: 15px 32px; font-size: 1rem; }
.btn-block { width: 100%; }

/* Hero */
.hero { position: relative; color: #fff; padding: 110px 0 90px; background: linear-gradient(135deg, #0e2433 0%, #1a3a4a 45%, #1a6b5a 100%); overflow: hidden; }
.hero-inner { position: relative; z-index: 1; }
.hero-eyebrow { font-size: 0.85rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); font-weight: 600; margin-bottom: 18px; }
.hero-title { font-size: clamp(2rem, 5vw, 3.2rem); font-weight: 800; line-height: 1.12; margin-bottom: 20px; }
.hero-sub { font-size: 1.1rem; color: rgba(255,255,255,0.85); max-width: 640px; margin-bottom: 34px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 48px; }
.hero-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; max-width: 680px; }
.stat { background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.14); border-radius: 12px; padding: 18px 20px; }
.stat-num { display: block; font-size: 1.6rem; font-weight: 800; }
.stat-label { font-size: 0.8rem; color: rgba(255,255,255,0.7); }

/* Page hero */
.page-hero { background: linear-gradient(135deg, #0e2433, #1a6b5a); color: #fff; padding: 70px 0; }
.page-hero h1 { font-size: 2.4rem; font-weight: 800; margin-bottom: 10px; }
.page-hero p { color: rgba(255,255,255,0.85); max-width: 640px; }

/* Sections */
.section { padding: 80px 0; }
.section-alt { background: var(--bg-alt); }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 48px; }
.eyebrow { font-size: 0.8rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--brand); font-weight: 700; margin-bottom: 12px; }
.section-title { font-size: clamp(1.7rem, 3.5vw, 2.3rem); font-weight: 800; margin-bottom: 14px; }
.section-desc { color: var(--ink-soft); font-size: 1.02rem; }

/* Products */
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.product-grid-full { grid-template-columns: repeat(3, 1fr); }
.product-card { background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); border: 1px solid var(--line); display: flex; flex-direction: column; transition: transform .2s, box-shadow .2s; }
.product-card:hover { transform: translateY(-4px); box-shadow: 0 16px 40px rgba(20,40,35,0.14); }
.product-img { height: 200px; background-size: cover; background-position: center; position: relative; }
.product-img-placeholder { background: linear-gradient(135deg, #1a6b5a, #0e2433); }
.product-body { padding: 22px; }
.product-body h3 { font-size: 1.1rem; margin-bottom: 8px; }
.product-tag { display: inline-block; background: var(--brand-light); color: var(--brand-dark); font-size: 0.72rem; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase; padding: 3px 10px; border-radius: 999px; margin-bottom: 8px; }
.product-specs { color: var(--ink-soft); font-size: 0.88rem; margin-top: 8px; }
.empty-note { text-align: center; color: var(--ink-soft); padding: 30px 0; }

/* News */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-grid-full { grid-template-columns: repeat(3, 1fr); }
.news-card { background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); border: 1px solid var(--line); display: flex; flex-direction: column; transition: transform .2s; }
.news-card:hover { transform: translateY(-4px); }
.news-img { height: 180px; background-size: cover; background-position: center; }
.news-body { padding: 20px; }
.news-body h3 { font-size: 1.05rem; margin: 8px 0; }
.news-body time { color: var(--ink-soft); font-size: 0.82rem; }

/* About */
.about-preview { max-width: 720px; }
.about-full h2 { font-size: 1.8rem; margin-bottom: 6px; }
.cn-name { color: var(--ink-soft); margin-bottom: 24px; }
.about-text { color: var(--ink-soft); margin-bottom: 32px; }
.factory-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.factory-card { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 24px 16px; text-align: center; box-shadow: var(--shadow); }
.factory-num { display: block; font-size: 1.7rem; font-weight: 800; color: var(--brand); }
.factory-label { font-size: 0.82rem; color: var(--ink-soft); }

/* CTA */
.cta-section { background: linear-gradient(135deg, #1a6b5a, #0e2433); color: #fff; padding: 70px 0; }
.cta-inner { text-align: center; }
.cta-inner h2 { font-size: 2rem; font-weight: 800; margin-bottom: 12px; }
.cta-inner p { color: rgba(255,255,255,0.85); margin-bottom: 28px; }
.cta-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* Contact */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 40px; }
.contact-line { display: flex; flex-direction: column; padding: 14px 0; border-bottom: 1px solid var(--line); }
.contact-line strong { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--ink-soft); margin-bottom: 4px; }
.contact-line span { font-weight: 500; }
.contact-form { display: flex; flex-direction: column; gap: 14px; }
.contact-form input, .contact-form textarea { padding: 13px 16px; border: 1px solid var(--line); border-radius: 10px; font-family: inherit; font-size: 0.95rem; background: var(--bg-alt); }
.contact-form input:focus, .contact-form textarea:focus { outline: none; border-color: var(--brand); background: #fff; }
.contact-form textarea { resize: vertical; }

/* Detail */
.detail-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.detail-visual img { width: 100%; border-radius: var(--radius); }
.detail-placeholder { height: 300px; border-radius: var(--radius); }
.detail-info h1 { font-size: 2rem; margin-bottom: 12px; }
.detail-specs { color: var(--ink-soft); margin: 16px 0; }
.detail-desc { color: var(--ink-soft); margin: 20px 0; }

/* Article */
.article-wrap { max-width: 760px; }
.article-wrap h1 { font-size: 2rem; margin: 14px 0; }
.article-time { color: var(--ink-soft); font-size: 0.85rem; display: block; margin-bottom: 20px; }
.article-cover { width: 100%; border-radius: var(--radius); margin: 20px 0; }
.article-content { color: var(--ink-soft); font-size: 1.05rem; line-height: 1.8; }
.video-wrap { position: relative; padding-bottom: 56.25%; height: 0; margin: 20px 0; }
.video-wrap iframe, .video-wrap video { position: absolute; inset: 0; width: 100%; height: 100%; border-radius: var(--radius); }

/* Footer */
.site-footer { background: #0e2433; color: rgba(255,255,255,0.75); padding: 48px 0; }
.footer-inner { display: flex; flex-direction: column; align-items: center; text-align: center; gap: 10px; }
.footer-inner .brand { color: #fff; margin-bottom: 8px; }
.footer-copy { font-size: 0.82rem; opacity: 0.6; }

/* Responsive */
@media (max-width: 900px) {
  .product-grid, .product-grid-full, .news-grid, .news-grid-full { grid-template-columns: 1fr 1fr; }
  .factory-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid, .detail-wrap { grid-template-columns: 1fr; }
  .hero-stats { grid-template-columns: 1fr 1fr; }
  .header-inner { flex-wrap: wrap; height: auto; padding: 12px 0; }
}
@media (max-width: 560px) {
  .product-grid, .product-grid-full, .news-grid, .news-grid-full { grid-template-columns: 1fr; }
  .factory-grid { grid-template-columns: 1fr; }
  .main-nav { gap: 14px; }
}