/* ============================================================
   和晟精密官网 — 样式表 v4.0
   白底工业风 | 深蓝文字 | 橙色CTA #E8650A
   ============================================================ */

:root {
  --bg: #FFFFFF;
  --bg-alt: #F8FAFC;
  --text: #0F1A2E;
  --text-secondary: #475569;
  --text-light: #94A3B8;
  --accent: #E8650A;
  --accent-hover: #D45500;
  --accent-light: rgba(232,101,10,.08);
  --border: #E2E8F0;
  --shadow: 0 1px 3px rgba(0,0,0,.06);
  --shadow-md: 0 4px 16px rgba(0,0,0,.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,.1);
  --radius: 10px;
  --radius-sm: 6px;
  --font-en: 'DM Sans', -apple-system, sans-serif;
  --font-cn: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --max-width: 1200px;
  --nav-height: 72px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-cn);
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 { font-family: var(--font-en); font-weight: 700; line-height: 1.2; }
h1 { font-size: clamp(2rem, 5vw, 3.5rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
h3 { font-size: 1.15rem; }

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }

img { max-width: 100%; height: auto; display: block; }

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
.section { padding: 100px 0; }
.section-alt { background: var(--bg-alt); }
.section-tight { padding: 60px 0; }

/* ========== NAV ========== */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255,255,255,.95); backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent; transition: all .3s; height: var(--nav-height);
}
.nav.scrolled { border-bottom-color: var(--border); box-shadow: var(--shadow); }
.nav-inner {
  max-width: var(--max-width); margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between; height: 100%;
}
.nav-logo { font-family: var(--font-en); font-size: 1.25rem; font-weight: 700; color: var(--text); }
.nav-logo span { color: var(--accent); }
.nav-links { display: flex; align-items: center; gap: 32px; list-style: none; }
.nav-links a { color: var(--text-secondary); font-size: .9rem; font-weight: 500; transition: color .2s; }
.nav-links a:hover, .nav-links a.active { color: var(--accent); }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 28px; border-radius: var(--radius-sm); font-weight: 600;
  font-size: .9rem; cursor: pointer; transition: all .25s; border: 2px solid transparent;
  font-family: var(--font-en);
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); color: #fff; transform: translateY(-1px); box-shadow: 0 4px 12px rgba(232,101,10,.3); }
.btn-outline { background: transparent; border-color: var(--border); color: var(--text); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }
.btn-lg { padding: 16px 36px; font-size: 1rem; }
.btn-white { background: #fff; color: var(--text); border-color: #fff; }
.btn-white:hover { background: var(--bg-alt); color: var(--text); }

.lang-switch { font-size: .85rem; font-weight: 600; color: var(--text-secondary); cursor: pointer; }
.lang-switch:hover { color: var(--accent); }

.mobile-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; background: none; border: none; padding: 4px; }
.mobile-toggle span { display: block; width: 24px; height: 2px; background: var(--text); transition: all .3s; }

@media (max-width: 768px) {
  .nav-links { position: fixed; top: var(--nav-height); left: 0; right: 0;
    background: var(--bg); flex-direction: column; padding: 24px;
    border-bottom: 1px solid var(--border); box-shadow: var(--shadow-md);
    display: none; gap: 16px; }
  .nav-links.open { display: flex; }
  .mobile-toggle { display: flex; }
}

/* ========== HERO ========== */
.hero {
  padding: calc(var(--nav-height) + 80px) 0 100px;
  background: linear-gradient(180deg, #fff 0%, var(--bg-alt) 100%);
}
.hero-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 20px; background: var(--accent-light); color: var(--accent);
  border-radius: 50px; font-size: .85rem; font-weight: 600; margin-bottom: 24px;
}
.hero-badge::before { content: "⚡"; font-size: 1rem; }
.hero-title { margin-bottom: 20px; }
.hero-subtitle { color: var(--text-secondary); font-size: 1.1rem; line-height: 1.8; margin-bottom: 36px; max-width: 500px; }
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; }

.hero-visual {
  position: relative;
  background: linear-gradient(135deg, #0F1A2E 0%, #1A2D4A 100%);
  border-radius: var(--radius); padding: 48px 40px; color: #fff;
  box-shadow: var(--shadow-lg);
}
.hero-visual .big-num { font-family: var(--font-en); font-size: 3.5rem; font-weight: 700; color: var(--accent); }
.hero-visual .big-label { font-size: 1rem; margin-top: 4px; color: rgba(255,255,255,.7); }
.hero-visual .divider { width: 60px; height: 3px; background: var(--accent); margin: 24px 0; border-radius: 2px; }
.hero-visual .feature-list { list-style: none; }
.hero-visual .feature-list li { padding: 8px 0; font-size: .9rem; color: rgba(255,255,255,.8); display: flex; align-items: center; gap: 10px; }
.hero-visual .feature-list li::before { content: "✓"; color: var(--accent); font-weight: 700; }

@media (max-width: 768px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { padding: 32px 24px; }
}

/* ========== STATS BAR ========== */
.stats-bar {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 0;
  background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow);
  margin-top: -40px; position: relative; z-index: 10;
}
.stat-item { text-align: center; padding: 32px 20px; position: relative; }
.stat-item + .stat-item { border-left: 1px solid var(--border); }
.stat-item .num { font-family: var(--font-en); font-size: 2rem; font-weight: 700; color: var(--accent); }
.stat-item .lbl { font-size: .85rem; color: var(--text-secondary); margin-top: 4px; }
.stat-item .sub { font-size: .75rem; color: var(--text-light); margin-top: 2px; }

@media (max-width: 768px) {
  .stats-bar { grid-template-columns: 1fr 1fr; }
  .stat-item:nth-child(3) { border-left: none; }
}
@media (max-width: 480px) {
  .stats-bar { grid-template-columns: 1fr; }
  .stat-item + .stat-item { border-left: none; border-top: 1px solid var(--border); }
}

/* ========== ABOUT BLOCK ========== */
.about-block { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.about-image {
  background: linear-gradient(135deg, var(--bg-alt) 0%, #E2E8F0 100%);
  border-radius: var(--radius); min-height: 350px;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-light); font-size: .9rem;
}
.about-text h2 { margin-bottom: 20px; }
.about-data {
  background: linear-gradient(135deg, #0F1A2E 0%, #1A2D4A 100%);
  color: #fff; border-radius: var(--radius); padding: 40px 32px;
}
.about-data h2 { color: #fff; margin-bottom: 20px; }
.about-data p { color: rgba(255,255,255,.85); }
.about-data strong { color: var(--accent); }
.about-text p { color: var(--text-secondary); margin-bottom: 16px; line-height: 1.9; }
.about-text .highlight { color: var(--accent); font-weight: 600; }

@media (max-width: 768px) {
  .about-block { grid-template-columns: 1fr; gap: 32px; }
  .about-image { min-height: 240px; }
}

/* ========== SECTION TITLE ========== */
.section-title { text-align: center; margin-bottom: 60px; }
.section-title .label {
  display: inline-block; padding: 6px 16px; background: var(--accent-light);
  color: var(--accent); border-radius: 50px; font-size: .8rem; font-weight: 600;
  margin-bottom: 16px; text-transform: uppercase; letter-spacing: .05em;
}
.section-title h2 { margin-bottom: 12px; }
.section-title p { color: var(--text-secondary); max-width: 600px; margin: 0 auto; }

/* ========== CAPABILITY GRID ========== */
.cap-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.cap-grid.four-cols { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 900px) { .cap-grid { grid-template-columns: repeat(2, 1fr); } .cap-grid.four-cols { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .cap-grid { grid-template-columns: 1fr; } .cap-grid.four-cols { grid-template-columns: 1fr; } }
.cap-card {
  background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 36px 28px;
  transition: all .3s; position: relative; overflow: hidden;
}
.cap-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--accent); transform: scaleX(0); transition: transform .3s;
}
.cap-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
.cap-card:hover::before { transform: scaleX(1); }
.cap-icon { font-size: 2.2rem; margin-bottom: 20px; }
.cap-card h3 { margin-bottom: 10px; }
.cap-card p { color: var(--text-secondary); font-size: .9rem; line-height: 1.7; }

/* ========== INDUSTRY GRID ========== */
.industry-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
@media (max-width: 768px) { .industry-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .industry-grid { grid-template-columns: 1fr; } }
.industry-card {
  text-align: center; padding: 32px 20px;
  background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius); transition: all .3s;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  min-height: 160px;
}
.industry-card h4 { margin: 12px 0 6px; font-size: 1.05rem; }
.industry-card p { margin: 0; font-size: .85rem; color: var(--text-secondary); line-height: 1.5; }
.industry-card:hover { box-shadow: var(--shadow-md); border-color: var(--accent); }
.industry-card .ind-icon { font-size: 2rem; margin-bottom: 12px; }
.industry-card h4 { font-size: .95rem; margin-bottom: 4px; }
.industry-card p { font-size: .8rem; color: var(--text-secondary); }

/* ========== IMAGE PLACEHOLDER ========== */
.img-placeholder {
  background: linear-gradient(135deg, #F1F5F9 0%, #E2E8F0 100%);
  border-radius: var(--radius); min-height: 280px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  color: var(--text-light); font-size: .85rem;
}
.img-placeholder .ph-icon { font-size: 3rem; margin-bottom: 12px; opacity: .5; }
.img-placeholder.dark {
  background: linear-gradient(135deg, #0F1A2E 0%, #1A2D4A 100%);
  color: rgba(255,255,255,.4);
}

/* ========== PAGE HERO ========== */
.page-hero {
  padding: calc(var(--nav-height) + 60px) 0 50px;
  background: linear-gradient(180deg, var(--bg-alt) 0%, var(--bg) 100%);
  text-align: center;
}
.page-hero .breadcrumb { font-size: .85rem; color: var(--accent); font-weight: 600; margin-bottom: 12px; }
.page-hero h1 { margin-bottom: 12px; }
.page-hero p { color: var(--text-secondary); max-width: 640px; margin: 0 auto; font-size: 1.05rem; }

/* ========== EQUIPMENT STRIP ========== */
.equip-strip {
  display: flex; align-items: center; gap: 20px;
  padding: 24px; background: var(--bg);
  border: 1px solid var(--border); border-radius: var(--radius);
  margin-bottom: 12px; transition: all .3s;
}
.equip-strip:hover { box-shadow: var(--shadow-md); border-color: var(--accent); }
.equip-num { font-family: var(--font-en); font-size: 1.8rem; font-weight: 700; color: var(--accent); min-width: 70px; text-align: center; }
.equip-info h4 { font-size: 1rem; margin-bottom: 4px; }
.equip-info p { font-size: .85rem; color: var(--text-secondary); line-height:1.7; }
.equip-specs { display:flex; flex-wrap:wrap; gap:8px; margin-top:10px; }
.equip-specs span { background:var(--bg-alt); border:1px solid var(--border); padding:4px 12px; border-radius:var(--radius-sm); font-size:.82rem; color:var(--text-secondary); }
.step-desc { font-size:.78rem; color:var(--text-light); margin:4px 0 0; line-height:1.4; }

/* ========== PROCESS FLOW ========== */
.process-flow {
  display: grid; grid-template-columns: repeat(7, 1fr); gap: 12px; padding: 40px 0;
  align-items: start;
}
.process-arrow { display: none; }
.process-step {
  text-align: center; padding: 24px 12px;
  background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius); transition: all .3s;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  height: 160px;
}
@media (max-width: 900px) { .process-flow { grid-template-columns: repeat(4, 1fr); } }
@media (max-width: 600px) { .process-flow { grid-template-columns: repeat(2, 1fr); } }
.process-step:hover { border-color: var(--accent); box-shadow: var(--shadow-md); }
.process-step .step-num {
  width: 44px; height: 44px; line-height: 44px;
  border-radius: 50%; background: var(--accent); color: #fff;
  font-family: var(--font-en); font-weight: 700; font-size: 1.1rem;
  margin: 0 auto 12px;
}
.process-step h4 { font-size: .9rem; }
.process-arrow { font-size: 1.5rem; color: var(--text-light); }

/* ========== CERT GRID ========== */
.cert-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
.cert-card {
  display: flex; align-items: flex-start; gap: 20px; padding: 32px;
  background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius); transition: all .3s;
}
.cert-card:hover { box-shadow: var(--shadow-md); }
.cert-icon-large { font-size: 2.8rem; flex-shrink: 0; }
.cert-img-slot {
  width: 100%; height: 180px;
  background: var(--bg-alt); border: 2px dashed var(--border);
  border-radius: var(--radius); margin-bottom: 16px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 8px; color: var(--text-light); font-size: .85rem;
  transition: all .3s;
}
.cert-img-slot img {
  width: 100%; height: 100%; object-fit: contain;
  border-radius: var(--radius);
}
.cert-img-slot .ph-icon { font-size: 2rem; }
.cert-card h3 { font-size: 1.05rem; margin-bottom: 6px; }
.cert-card p { font-size: .85rem; color: var(--text-secondary); line-height: 1.6; }

/* ========== CONTACT ========== */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 60px; }
.contact-info h3 { margin-bottom: 20px; }
.contact-info .info-item { display: flex; gap: 14px; margin-bottom: 20px; align-items: flex-start; }
.contact-info .info-icon {
  width: 44px; height: 44px; border-radius: 50%; background: var(--accent-light);
  display: flex; align-items: center; justify-content: center; font-size: 1.2rem; flex-shrink: 0;
}
.contact-info .info-text { font-size: .9rem; color: var(--text-secondary); }
.contact-info .info-text strong { color: var(--text); display: block; margin-bottom: 2px; font-size: .95rem; }

.form-card {
  background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 36px; box-shadow: var(--shadow);
}
.form-card h3 { margin-bottom: 24px; text-align: center; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: .85rem; font-weight: 600; margin-bottom: 6px; color: var(--text); }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 12px 16px; border: 1px solid var(--border);
  border-radius: var(--radius-sm); font-size: .9rem; font-family: var(--font-cn);
  transition: border-color .2s, box-shadow .2s; background: var(--bg-alt);
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-light);
}
.form-group textarea { resize: vertical; min-height: 130px; }

@media (max-width: 768px) {
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
}

/* ========== CTA SECTION ========== */
.cta-section {
  text-align: center; padding: 100px 0;
  background: linear-gradient(135deg, #0F1A2E 0%, #1A2D4A 100%);
  color: #fff;
}
.cta-section h2 { color: #fff; margin-bottom: 16px; }
.cta-section p { color: rgba(255,255,255,.7); margin-bottom: 28px; font-size: 1.05rem; }
.cta-section .btn-primary { background: var(--accent); border-color: var(--accent); }

/* ========== FOOTER ========== */
.footer {
  background: #0A1320; color: #64748B;
  padding: 64px 0 32px;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 48px; }
.footer h4 { color: #fff; font-size: .95rem; margin-bottom: 18px; }
.footer p { font-size: .85rem; line-height: 1.8; }
.footer a { color: #64748B; font-size: .85rem; transition: color .2s; }
.footer a:hover { color: var(--accent); }
.footer-links { list-style: none; }
.footer-links li { margin-bottom: 10px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding-top: 24px; font-size: .8rem;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
}

@media (max-width: 768px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .footer-grid { grid-template-columns: 1fr; } }

/* ========== ANIMATION ========== */
.reveal { opacity: 0; transform: translateY(24px); transition: all .6s ease; }
.reveal.revealed, .reveal.visible { opacity: 1; transform: translateY(0); }