/* ============================================================
   POLYC MACHINE — Flat Design v3 (supersedes v1 + v2)
   加载在所有旧 CSS 之后。修复字体、区块节奏、对比度、
   间距、子页首屏统一等全部已知视觉问题。
   ============================================================ */

:root {
  --c-primary:     #0d3b7a;
  --c-primary-2:   #1a5fb4;
  --c-accent:      #2e8b57;
  --c-accent-2:    #256e45;
  --c-bg:          #ffffff;
  --c-bg-soft:    #f4f6fa;   /* 明确的浅灰，和白色有肉眼可分的差 */
  --c-text:        #1a2332;
  --c-text-2:      #5a6b7b;
  --c-border:      #e2e8f0;
  --c-border-soft: #eef1f5;
  --radius:        8px;
  --radius-lg:     12px;
  --shadow-sm:     0 1px 2px rgba(13,59,122,.06);
  --shadow:        0 2px 8px rgba(13,59,122,.08);
  --shadow-lg:     0 8px 24px rgba(13,59,122,.10);
  --transition:    .2s ease;
  --font-sans:     'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI',
                   Roboto, 'Helvetica Neue', Arial, sans-serif;
}

/* ---------- 全局 ---------- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans) !important;
  color: var(--c-text) !important;
  background: var(--c-bg) !important;
  font-size: 16px !important;
  line-height: 1.7 !important;
  -webkit-font-smoothing: antialiased;
}

h1,h2,h3,h4,h5,h6 {
  font-family: var(--font-sans) !important;
  color: var(--c-text) !important;
  font-weight: 700 !important;
  letter-spacing: -0.01em !important;
  line-height: 1.25 !important;
  margin-top: 0 !important;
}
h1 { font-size: clamp(28px,4vw,42px) !important; }
h2 { font-size: clamp(22px,3vw,30px) !important; }
h3 { font-size: clamp(17px,2vw,20px) !important; }
p  { color: var(--c-text-2); margin-bottom: 1em; }
a  { color: var(--c-primary-2); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--c-primary); }
img { max-width: 100%; height: auto; display: block; }

/* ---------- 区块：统一 padding + 明确交替 ---------- */
section {
  padding: 72px 24px !important;
}
/* 浅灰区块 */
.metrics-band, .principle-module, .specifications-module,
.media-module, .cases-module, .cta-module,
.application-strip, .quote, .section.related,
[class*="related"] {
  background: var(--c-bg-soft) !important;
}
/* 白区块 */
.about-module, .components-module, .inquiry-module,
.product-content, .specs, .page-detail-images,
.inquiry-module {
  background: #ffffff !important;
}

/* ---------- FAQ：只给卡片加样式，不压 section ---------- */
.faq-module, .section.faq, section.faq {
  padding: 72px 24px !important;
  background: #ffffff !important;
}
.faq-module details, .section.faq details,
details.faq-item, [class*="faq-item"] {
  background: #fff !important;
  border: 1px solid var(--c-border) !important;
  border-radius: var(--radius) !important;
  padding: 18px 22px !important;
  margin-bottom: 12px !important;
  box-shadow: var(--shadow-sm) !important;
}
details summary {
  font-weight: 600 !important; font-size: 16px !important;
  color: var(--c-text) !important; cursor: pointer !important;
  list-style: none !important;
}
details summary::-webkit-details-marker { display: none; }
details summary::after {
  content: "+"; float: right; font-size: 22px; font-weight: 300;
  color: var(--c-primary-2); transition: transform var(--transition);
}
details[open] summary::after { content: "−"; }

/* ---------- 导航 ---------- */
.site-header, header.site-header {
  background: rgba(255,255,255,.92) !important;
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--c-border-soft) !important;
  box-shadow: var(--shadow-sm) !important;
}
.shared-brand strong { color: var(--c-primary) !important; }
.shared-brand span   { color: var(--c-text-2) !important; }
#main-navigation a, .shared-links a {
  color: var(--c-text) !important; font-weight: 500 !important;
  font-size: 14px !important; border-radius: 4px !important;
  transition: all var(--transition) !important;
}
#main-navigation a:hover, .shared-links a:hover {
  color: var(--c-primary) !important; background: var(--c-bg-soft) !important;
}
#main-navigation a.active { color: var(--c-primary) !important; font-weight: 700 !important; }
.products-panel {
  background: #fff !important; border: 1px solid var(--c-border) !important;
  border-radius: var(--radius) !important; box-shadow: var(--shadow-lg) !important; padding: 8px !important;
}

/* ---------- 按钮 ---------- */
.button, .header-cta, .form-submit,
a.button, button.button, [type="submit"] {
  display: inline-flex !important; align-items: center !important;
  justify-content: center !important; gap: 8px !important;
  background: var(--c-accent) !important; color: #fff !important;
  border: 1px solid var(--c-accent) !important; border-radius: var(--radius) !important;
  padding: 11px 22px !important; font-size: 14px !important; font-weight: 600 !important;
  font-family: var(--font-sans) !important; box-shadow: var(--shadow-sm) !important;
  cursor: pointer !important; transition: all var(--transition) !important;
  text-decoration: none !important;
}
.button:hover, .header-cta:hover, .form-submit:hover {
  background: var(--c-accent-2) !important; border-color: var(--c-accent-2) !important;
  transform: translateY(-1px) !important; box-shadow: var(--shadow) !important;
}

/* ---------- 卡片 ---------- */
[class*="card"], [class*="feature"], [class*="assembly"] {
  background: #fff !important; border: 1px solid var(--c-border) !important;
  border-radius: var(--radius) !important; box-shadow: var(--shadow-sm) !important;
  padding: 24px !important; transition: all var(--transition) !important;
}
[class*="card"]:hover, [class*="feature"]:hover {
  box-shadow: var(--shadow) !important; transform: translateY(-2px) !important;
}
.contact-card {
  background: #fff !important; border: 1px solid var(--c-border) !important;
  border-radius: var(--radius) !important; box-shadow: var(--shadow-sm) !important;
  padding: 20px !important;
}
.contact-card b, .contact-card [class*="label"] {
  font-size: 11px !important; font-weight: 700 !important;
  letter-spacing: .1em !important; text-transform: uppercase !important;
  color: var(--c-text-2) !important;
}
.contact-card a { color: var(--c-primary) !important; font-weight: 600 !important; }

/* ---------- 表格 ---------- */
.table-wrap, [class*="table-wrap"] {
  border: 1px solid var(--c-border) !important; border-radius: var(--radius) !important;
  overflow: hidden !important; box-shadow: var(--shadow-sm) !important; background: #fff !important;
}
table { width: 100% !important; font-size: 14px !important; border-collapse: collapse !important; }
thead th {
  background: var(--c-primary) !important; color: #fff !important;
  font-weight: 600 !important; font-size: 13px !important;
  padding: 14px 16px !important; text-align: left !important; border: none !important;
}
tbody td { padding: 12px 16px !important; border-bottom: 1px solid var(--c-border-soft) !important; }
tbody tr:nth-child(even) td { background: var(--c-bg-soft) !important; }
tbody tr:hover td { background: rgba(26,95,180,.05) !important; }

/* ---------- 表单 ---------- */
input[type="text"], input[type="email"], input[type="tel"],
select, textarea {
  width: 100% !important; font-family: var(--font-sans) !important; font-size: 14px !important;
  color: var(--c-text) !important; background: #fff !important;
  border: 1px solid var(--c-border) !important; border-radius: var(--radius) !important;
  padding: 11px 14px !important; transition: all var(--transition) !important;
}
input:focus, select:focus, textarea:focus {
  outline: none !important; border-color: var(--c-primary-2) !important;
  box-shadow: 0 0 0 3px rgba(26,95,180,.12) !important;
}
form label { font-size: 13px !important; font-weight: 600 !important; color: var(--c-text) !important; display: block !important; margin-bottom: 6px !important; }

/* ---------- 子页首屏：统一深蓝渐变 ---------- */
.product-hero, section.product-hero {
  background: linear-gradient(135deg, #0d3b7a 0%, #1a5fb4 100%) !important;
  color: #ffffff !important; padding: 80px 24px !important;
}
.product-hero h1 { color: #ffffff !important; }
.product-hero p, .product-hero .lead { color: rgba(255,255,255,.85) !important; }
.product-hero .eyebrow {
  background: rgba(255,255,255,.15) !important; color: #ffffff !important;
}

/* ---------- Contact 区 padding 修正 ---------- */
.contact-section, section.contact-section {
  padding: 64px 24px !important;
}
.contact-section .contact-inner, .contact-section > div {
  max-width: 1200px !important; margin: 0 auto !important;
}

/* ---------- 首页 hero 收敛 ---------- */
.module-hero, #hero { padding: 96px 24px !important; }

/* ---------- 面包屑 ---------- */
.crumb, .breadcrumb {
  font-size: 13px !important; color: var(--c-text-2) !important; padding: 16px 24px !important;
  max-width: 1200px; margin: 0 auto;
}
.crumb a, .breadcrumb a { color: var(--c-primary-2) !important; }

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--c-primary) !important; color: rgba(255,255,255,.85) !important;
  padding: 56px 24px 24px !important;
}
.site-footer a { color: rgba(255,255,255,.8) !important; }
.site-footer b { color: #fff !important; font-size: 13px !important; letter-spacing: .08em !important; text-transform: uppercase !important; display: block !important; margin-bottom: 14px !important; }
.footer-brand { color: #fff !important; font-weight: 800 !important; font-size: 20px !important; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.15) !important; padding-top: 20px !important; margin-top: 36px !important; font-size: 13px !important; color: rgba(255,255,255,.6) !important; }

/* ---------- 部件图区 ---------- */
.page-detail-images { background: #ffffff !important; padding: 64px 24px !important; }
.page-detail-images figure {
  border: 1px solid var(--c-border) !important; border-radius: var(--radius) !important;
  overflow: hidden !important; background: #fff !important; transition: all var(--transition) !important;
}
.page-detail-images figure:hover { box-shadow: var(--shadow) !important; transform: translateY(-2px) !important; }
.page-detail-images figcaption {
  padding: 10px 14px !important; font-size: 13px !important; font-weight: 600 !important;
  color: var(--c-primary) !important; border-top: 1px solid var(--c-border-soft) !important;
}

/* ---------- 手机端 ---------- */
@media (max-width: 768px) {
  section { padding: 48px 18px !important; }
  h1 { font-size: 28px !important; }
  h2 { font-size: 22px !important; }
  .product-hero { padding: 56px 18px !important; }
  .contact-section { padding: 48px 18px !important; }
}

::selection { background: rgba(26,95,180,.15); color: var(--c-primary); }