:root {
  --primary: #0f766e;
  --primary-dark: #0a4f4a;
  --primary-light: #14b8a6;
  --accent: #f59e0b;
  --bg: #f8fafc;
  --bg-card: #ffffff;
  --text: #1e293b;
  --text-light: #64748b;
  --border: #e2e8f0;
  --grad: linear-gradient(135deg, #0f766e 0%, #14b8a6 100%);
  --grad-soft: linear-gradient(135deg, #ecfdf5 0%, #f0fdfa 100%);
  --radius: 14px;
  --shadow: 0 6px 20px rgba(15, 118, 110, 0.08);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 15px;
}
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }

/* Top bar */
#topbar {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.bar-inner { display: flex; align-items: center; gap: 18px; height: 64px; }
.brand { font-weight: 700; color: var(--primary-dark); font-size: 16px; white-space: nowrap; }
.nav { display: flex; gap: 6px; margin-left: auto; flex-wrap: wrap; }
.nav-link { padding: 7px 12px; border-radius: 8px; font-size: 14px; color: var(--text-light); transition: .2s; }
.nav-link:hover { background: var(--grad-soft); color: var(--primary); }
.lang-btn {
  margin-left: 6px; padding: 8px 14px; border: 1px solid var(--primary);
  background: #fff; color: var(--primary); border-radius: 999px;
  font-weight: 600; cursor: pointer; font-size: 14px; transition: .2s; white-space: nowrap;
}
.lang-btn:hover { background: var(--primary); color: #fff; }

/* Hero */
.hero { background: var(--grad); color: #fff; padding: 64px 24px 80px; text-align: center; position: relative; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(circle at 20% 30%, rgba(255,255,255,0.15) 0%, transparent 40%),
              radial-gradient(circle at 80% 70%, rgba(255,255,255,0.1) 0%, transparent 40%);
}
.hero .inner { position: relative; max-width: 1000px; margin: 0 auto; }
.hero .badge { display: inline-block; background: rgba(255,255,255,0.2); backdrop-filter: blur(8px); padding: 6px 16px; border-radius: 20px; font-size: 13px; margin-bottom: 20px; border: 1px solid rgba(255,255,255,0.3); }
.hero h1 { font-size: 38px; margin-bottom: 10px; letter-spacing: .5px; font-weight: 700; }
.hero .sub-en { font-size: 17px; opacity: .92; }
.hero .tagline { font-size: 20px; margin: 22px 0 6px; font-weight: 600; letter-spacing: 3px; }
.hero .slogan { font-size: 15px; opacity: .9; }
.hero .meta { display: flex; justify-content: center; gap: 28px; margin-top: 36px; flex-wrap: wrap; }
.hero .meta div { background: rgba(255,255,255,0.12); backdrop-filter: blur(8px); padding: 14px 22px; border-radius: 12px; border: 1px solid rgba(255,255,255,0.2); }
.hero .meta strong { font-size: 26px; display: block; }
.hero .meta span { font-size: 13px; opacity: .9; }

/* Sections */
section { padding: 60px 0; }
section.alt { background: var(--bg-card); }
.section-title { text-align: center; margin-bottom: 42px; }
.section-title .num { color: var(--primary); font-size: 14px; letter-spacing: 4px; font-weight: 600; }
.section-title h2 { font-size: 30px; margin: 8px 0 10px; color: var(--text); }
.section-title .desc { color: var(--text-light); max-width: 720px; margin: 0 auto; }
.sub-h { font-size: 16px; color: var(--primary-dark); font-weight: 700; margin-bottom: 14px; }

/* Company */
.profile-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 36px; align-items: start; }
.profile-text p { margin-bottom: 14px; }
.profile-img img { width: 100%; border-radius: var(--radius); box-shadow: var(--shadow); border: 1px solid var(--border); }
.highlight { background: var(--grad-soft); border-left: 4px solid var(--primary); padding: 16px 20px; border-radius: 10px; color: var(--primary-dark); font-weight: 500; margin: 6px 0 14px; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-top: 40px; }
.stat-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; text-align: center; box-shadow: var(--shadow); }
.stat-card .num { font-size: 28px; font-weight: 800; color: var(--primary); }
.stat-card .label { font-size: 13px; color: var(--text-light); margin-top: 4px; }

/* Pillars / innovations */
.pillars { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.pillar { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow); }
.pillar .icon { font-size: 34px; margin-bottom: 10px; }
.pillar h3 { font-size: 18px; margin-bottom: 8px; color: var(--primary-dark); }
.pillar p { color: var(--text-light); font-size: 14px; }
.innovations { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.inno-item { background: var(--grad-soft); border: 1px solid #cdeae4; border-radius: 12px; padding: 18px; }
.inno-item .idx { width: 30px; height: 30px; border-radius: 50%; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 700; margin-bottom: 10px; }
.inno-item p { font-size: 13px; color: var(--text); }

/* Honors */
.qual-grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: 36px; align-items: start; }
.qual-block { margin-bottom: 18px; }
.qual-list ul { list-style: none; }
.qual-list li { padding: 7px 0; border-bottom: 1px dashed var(--border); display: flex; align-items: center; gap: 10px; font-size: 14px; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--primary-light); flex: none; }
.qual-img img { width: 100%; border-radius: var(--radius); box-shadow: var(--shadow); border: 1px solid var(--border); }

/* Products */
.products-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.product-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); display: flex; flex-direction: column; }
.product-card .thumb { aspect-ratio: 16/9; background: var(--grad-soft); overflow: hidden; }
.product-card .thumb img { width: 100%; height: 100%; object-fit: cover; }
.product-card .body { padding: 20px 22px 24px; }
.product-card .cat { display: inline-block; font-size: 12px; color: var(--primary); background: var(--grad-soft); padding: 3px 10px; border-radius: 999px; font-weight: 600; }
.product-card h3 { font-size: 18px; margin: 10px 0 8px; color: var(--primary-dark); }
.product-card .desc { font-size: 14px; color: var(--text-light); }
.features { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; margin: 14px 0; }
.features div { font-size: 12.5px; background: #f1f5f9; border-radius: 8px; padding: 6px 10px; }
.process-flow { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin: 12px 0; font-size: 12px; }
.process-flow .step { background: var(--primary); color: #fff; padding: 4px 9px; border-radius: 6px; }
.process-flow .arrow { color: var(--primary-light); font-weight: 700; }
.note { margin-top: 12px; color: var(--primary); font-weight: 600; font-size: 14px; }
table { width: 100%; border-collapse: collapse; margin-top: 12px; font-size: 13px; }
.spec-table th, .spec-table td, .kv-table th, .kv-table td { border: 1px solid var(--border); padding: 7px 10px; text-align: left; }
.spec-table th { background: var(--grad-soft); color: var(--primary-dark); }
.kv-table th { background: #f1f5f9; color: var(--text); width: 42%; font-weight: 600; }

/* Cases */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.case-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.case-card .thumb { aspect-ratio: 4/3; overflow: hidden; background: var(--grad-soft); }
.case-card .thumb img { width: 100%; height: 100%; object-fit: cover; }
.case-card .body { padding: 16px 18px 20px; }
.case-card .loc { font-size: 12px; color: var(--primary); font-weight: 600; margin-bottom: 6px; }
.case-card h4 { font-size: 16px; margin-bottom: 6px; color: var(--primary-dark); }
.case-card p { font-size: 13px; color: var(--text-light); }

/* Advantages */
.advantages { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.adv-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; text-align: center; box-shadow: var(--shadow); }
.adv-card .icon { font-size: 32px; margin-bottom: 8px; }
.adv-card h4 { font-size: 17px; color: var(--primary-dark); margin-bottom: 6px; }
.adv-card p { font-size: 13px; color: var(--text-light); }

/* Contact */
.contact { background: var(--grad); color: #fff; }
.contact h2 { text-align: center; font-size: 30px; margin-bottom: 8px; }
.contact-desc { text-align: center; opacity: .9; margin-bottom: 36px; }
.contact-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.contact-item { background: rgba(255,255,255,0.12); border: 1px solid rgba(255,255,255,0.22); border-radius: 12px; padding: 18px 20px; }
.contact-item .icon { font-size: 22px; margin-bottom: 6px; }
.contact-item .label { font-size: 12px; opacity: .85; }
.contact-item .value { font-size: 15px; font-weight: 600; margin-top: 2px; }

/* Inquiry form */
.inquiry-form { background: #fff; color: var(--text); border-radius: var(--radius); padding: 28px; margin-top: 40px; max-width: 640px; margin-left: auto; margin-right: auto; box-shadow: var(--shadow); }
.inquiry-form h3 { color: var(--primary-dark); font-size: 20px; margin-bottom: 6px; }
.form-desc { color: var(--text-light); font-size: 13px; margin-bottom: 16px; }
.field { margin-bottom: 12px; }
.inquiry-form input, .inquiry-form textarea {
  width: 100%; padding: 11px 13px; border: 1px solid var(--border); border-radius: 10px;
  font-size: 14px; font-family: inherit; color: var(--text); background: #fff;
}
.inquiry-form input:focus, .inquiry-form textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(15,118,110,0.12); }
.submit-btn { width: 100%; padding: 13px; background: var(--primary); color: #fff; border: none; border-radius: 10px; font-size: 15px; font-weight: 700; cursor: pointer; transition: .2s; }
.submit-btn:hover { background: var(--primary-dark); }
.submit-btn:disabled { opacity: .6; cursor: default; }
.form-status { margin-top: 12px; font-size: 13.5px; min-height: 18px; }
.form-status.ok { color: #047857; }
.form-status.err { color: #dc2626; }

/* Footer */
footer { background: var(--primary-dark); color: #cdeae4; padding: 22px 0; text-align: center; font-size: 13px; }

/* Responsive */
@media (max-width: 980px) {
  .profile-grid, .qual-grid { grid-template-columns: 1fr; }
  .pillars, .advantages { grid-template-columns: repeat(2, 1fr); }
  .innovations { grid-template-columns: repeat(2, 1fr); }
  .products-grid { grid-template-columns: 1fr; }
  .case-grid, .contact-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .hero h1 { font-size: 28px; }
  .nav { display: none; }
  .pillars, .advantages, .innovations, .case-grid, .contact-grid, .stats-grid { grid-template-columns: 1fr; }
  .features { grid-template-columns: 1fr; }
}