/* ============================================================
   智塑新材料 SMART POLY — 官网设计系统 V2
   设计语言：克制、专业、科技感、工业品质
   参考：MCAM 高端材料品牌 + 智塑品牌基因
   ============================================================ */

/* ---------- 设计令牌 ---------- */
:root {
  /* 品牌色 */
  --c-navy-900: #070f1e;
  --c-navy-800: #0a1628;
  --c-navy-700: #0f1f38;
  --c-navy-600: #162a4a;
  --c-navy-500: #1e3a5f;
  --c-blue-600: #1a56db;
  --c-blue-500: #2563eb;
  --c-blue-400: #3b82f6;
  --c-green-600: #059669;
  --c-green-500: #10b981;
  --c-green-400: #34d399;
  --c-amber-500: #f59e0b;

  /* 中性色 */
  --c-white: #ffffff;
  --c-gray-50: #f8fafc;
  --c-gray-100: #f1f5f9;
  --c-gray-200: #e2e8f0;
  --c-gray-300: #cbd5e1;
  --c-gray-400: #94a3b8;
  --c-gray-500: #64748b;
  --c-gray-600: #475569;
  --c-gray-700: #334155;
  --c-gray-800: #1e293b;
  --c-gray-900: #0f172a;

  /* 语义 */
  --c-bg: var(--c-white);
  --c-bg-alt: var(--c-gray-50);
  --c-bg-dark: var(--c-navy-800);
  --c-text: var(--c-gray-800);
  --c-text-light: var(--c-gray-500);
  --c-text-inverse: var(--c-white);
  --c-border: var(--c-gray-200);
  --c-border-dark: rgba(255,255,255,.12);

  /* 排版 */
  --font-sans: "Inter", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, sans-serif;
  --font-display: "Inter", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", "Consolas", monospace;

  /* 间距 */
  --space-1: 4px; --space-2: 8px; --space-3: 12px; --space-4: 16px;
  --space-5: 20px; --space-6: 24px; --space-8: 32px; --space-10: 40px;
  --space-12: 48px; --space-16: 64px; --space-20: 80px; --space-24: 96px;

  /* 圆角 */
  --r-sm: 6px; --r-md: 10px; --r-lg: 16px; --r-xl: 24px; --r-full: 999px;

  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(15,23,42,.06);
  --shadow-md: 0 4px 12px rgba(15,23,42,.08);
  --shadow-lg: 0 12px 32px rgba(15,23,42,.12);
  --shadow-xl: 0 24px 64px rgba(15,23,42,.18);
  --shadow-glow: 0 0 40px rgba(16,185,129,.25);

  /* 布局 */
  --maxw: 1240px;
  --nav-h: 72px;

  /* 过渡 */
  --ease: cubic-bezier(.16,1,.3,1);
  --t-fast: .2s; --t-base: .35s; --t-slow: .6s;
}

/* ---------- 重置 ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
html { scroll-behavior: smooth; scroll-padding-top: var(--nav-h); -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  color: var(--c-text);
  background: var(--c-bg);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; height: auto; }
a { color: inherit; text-decoration: none; transition: color var(--t-fast); }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; }
input, textarea, select { font-family: inherit; font-size: inherit; }

/* ---------- 通用容器 ---------- */
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 var(--space-6); }
.container-narrow { max-width: 860px; }

/* ---------- 排版 ---------- */
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12px; font-weight: 600; letter-spacing: 2.5px;
  text-transform: uppercase; color: var(--c-green-500);
  margin-bottom: var(--space-4);
}
.eyebrow::before {
  content: ""; width: 28px; height: 2px; background: var(--c-green-500);
}
.eyebrow.light { color: var(--c-green-400); }
.eyebrow.light::before { background: var(--c-green-400); }

h1, h2, h3, h4, h5 { font-family: var(--font-display); font-weight: 700; line-height: 1.2; color: var(--c-gray-900); letter-spacing: -.01em; }
h1 { font-size: clamp(36px, 5vw, 60px); font-weight: 800; }
h2 { font-size: clamp(28px, 3.5vw, 42px); }
h3 { font-size: clamp(20px, 2.5vw, 26px); }
h4 { font-size: 18px; }
.lead { font-size: 18px; color: var(--c-gray-600); line-height: 1.8; }
.text-light { color: var(--c-text-light); }
.text-center { text-align: center; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 28px; border-radius: var(--r-full);
  font-weight: 600; font-size: 15px; letter-spacing: .3px;
  cursor: pointer; border: 1.5px solid transparent;
  transition: all var(--t-base) var(--ease);
  position: relative; overflow: hidden;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--c-green-500), var(--c-green-600));
  color: #fff; box-shadow: 0 4px 16px rgba(16,185,129,.3);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(16,185,129,.4);
}
.btn-dark {
  background: var(--c-navy-800); color: #fff;
}
.btn-dark:hover { background: var(--c-navy-700); transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.btn-outline {
  background: transparent; color: var(--c-navy-700); border-color: var(--c-gray-300);
}
.btn-outline:hover { border-color: var(--c-green-500); color: var(--c-green-600); background: rgba(16,185,129,.05); }
.btn-ghost-light {
  background: rgba(255,255,255,.1); color: #fff; border-color: rgba(255,255,255,.25);
  backdrop-filter: blur(8px);
}
.btn-ghost-light:hover { background: rgba(255,255,255,.2); border-color: rgba(255,255,255,.5); }
.btn-sm { padding: 10px 20px; font-size: 14px; }
.btn .arrow { transition: transform var(--t-base); }
.btn:hover .arrow { transform: translateX(4px); }

/* ---------- 顶部导航 ---------- */
.site-nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: var(--nav-h);
  display: flex; align-items: center;
  transition: all var(--t-base) var(--ease);
  background: transparent;
}
.site-nav.scrolled {
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 var(--c-border), 0 4px 20px rgba(15,23,42,.06);
}
.site-nav .container { display: flex; align-items: center; justify-content: space-between; }

.nav-brand { display: flex; align-items: center; gap: 12px; font-weight: 800; }
.nav-brand .logo { width: 40px; height: 40px; object-fit: contain; }
.nav-brand .brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.nav-brand .brand-cn { font-size: 18px; color: #fff; transition: color var(--t-base); letter-spacing: 1px; }
.nav-brand .brand-en { font-size: 10px; font-weight: 600; letter-spacing: 2.5px; color: rgba(255,255,255,.7); transition: color var(--t-base); font-family: var(--font-mono); }
.site-nav.scrolled .nav-brand .brand-cn { color: var(--c-navy-800); }
.site-nav.scrolled .nav-brand .brand-en { color: var(--c-gray-400); }

.nav-menu { display: flex; align-items: center; gap: 4px; }
.nav-menu a {
  position: relative; padding: 8px 16px; font-size: 14.5px; font-weight: 500;
  color: rgba(255,255,255,.88); border-radius: var(--r-full);
  transition: all var(--t-fast);
}
.site-nav.scrolled .nav-menu a { color: var(--c-gray-700); }
.nav-menu a:hover { color: #fff; background: rgba(255,255,255,.1); }
.site-nav.scrolled .nav-menu a:hover { color: var(--c-green-600); background: rgba(16,185,129,.08); }
.nav-menu a.active { color: #fff; }
.site-nav.scrolled .nav-menu a.active { color: var(--c-green-600); }
.nav-menu a.active::after {
  content: ""; position: absolute; bottom: 2px; left: 50%; transform: translateX(-50%);
  width: 4px; height: 4px; border-radius: 50%; background: var(--c-green-500);
}

.nav-cta { margin-left: 12px; }
.lang-switch {
  margin-left: 4px; padding: 6px 12px; font-weight: 700; font-size: 13px;
  border: 1px solid rgba(255,255,255,.35); border-radius: var(--r-full);
  color: #fff !important; background: transparent; letter-spacing: .5px;
}
.site-nav.scrolled .lang-switch { color: var(--c-navy-800) !important; border-color: rgba(15,23,42,.25); }
.lang-switch:hover { background: rgba(255,255,255,.15) !important; }
.site-nav.scrolled .lang-switch:hover { background: rgba(16,185,129,.1) !important; }
.nav-toggle { display: none; width: 40px; height: 40px; align-items: center; justify-content: center; color: #fff; font-size: 22px; }
.site-nav.scrolled .nav-toggle { color: var(--c-navy-800); }

/* ---------- 页面头部 Banner（内页通用） ---------- */
.page-hero {
  position: relative; padding: calc(var(--nav-h) + 80px) 0 72px;
  background: var(--c-navy-800); color: #fff; overflow: hidden;
}
.page-hero::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 80% 20%, rgba(26,86,219,.25), transparent),
    radial-gradient(ellipse 60% 50% at 10% 80%, rgba(16,185,129,.15), transparent);
}
.page-hero::after {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 70% 70% at 50% 50%, #000, transparent);
}
.page-hero .container { position: relative; z-index: 2; }
.page-hero h1 { color: #fff; margin-bottom: var(--space-4); }
.page-hero .lead { color: rgba(255,255,255,.75); max-width: 680px; }
.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 13px; color: rgba(255,255,255,.5); margin-bottom: var(--space-6); }
.breadcrumb a { color: rgba(255,255,255,.6); }
.breadcrumb a:hover { color: var(--c-green-400); }
.breadcrumb .sep { opacity: .4; }

/* ---------- 版块通用 ---------- */
.section { padding: var(--space-24) 0; }
.section-alt { background: var(--c-gray-50); }
.section-dark { background: var(--c-navy-800); color: #fff; }
.section-dark h2, .section-dark h3, .section-dark h4 { color: #fff; }
.section-head { max-width: 720px; margin-bottom: var(--space-16); }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head p { color: var(--c-gray-500); margin-top: var(--space-4); font-size: 16px; }
.section-dark .section-head p { color: rgba(255,255,255,.7); }

/* ---------- 首页 Hero ---------- */
.hero {
  position: relative; min-height: 100vh; display: flex; align-items: center;
  color: #fff; overflow: hidden;
  background: var(--c-navy-900);
}
.hero-bg {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
  opacity: .35; filter: saturate(.8) contrast(1.05);
}
.hero-overlay {
  position: absolute; inset: 0;
  background:
    linear-gradient(105deg, rgba(7,15,30,.94) 0%, rgba(7,15,30,.7) 45%, rgba(7,15,30,.3) 100%),
    linear-gradient(180deg, rgba(7,15,30,.4) 0%, transparent 40%, rgba(7,15,30,.6) 100%);
}
.hero-grid-bg {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(105deg, #000 30%, transparent 80%);
}
.hero .container { position: relative; z-index: 2; padding-top: var(--nav-h); }
.hero-content { max-width: 720px; }
.hero h1 {
  color: #fff; font-size: clamp(38px, 5.5vw, 64px); font-weight: 800;
  line-height: 1.1; letter-spacing: -.02em; margin-bottom: var(--space-6);
}
.hero h1 .accent {
  background: linear-gradient(135deg, var(--c-green-400), var(--c-blue-400));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.hero p.lead { color: rgba(255,255,255,.8); font-size: 18px; max-width: 600px; margin-bottom: var(--space-10); }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: var(--space-16); }

.hero-stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 0;
  border-top: 1px solid rgba(255,255,255,.12); padding-top: var(--space-8);
  max-width: 720px;
}
.hero-stat { padding-right: var(--space-6); border-right: 1px solid rgba(255,255,255,.08); }
.hero-stat:last-child { border-right: none; }
.hero-stat .num { font-size: 36px; font-weight: 800; color: #fff; font-family: var(--font-display); line-height: 1; }
.hero-stat .num .unit { font-size: 18px; color: var(--c-green-400); font-weight: 600; margin-left: 2px; }
.hero-stat .lbl { font-size: 13px; color: rgba(255,255,255,.55); margin-top: 8px; letter-spacing: .5px; }

.hero-scroll {
  position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%);
  z-index: 2; display: flex; flex-direction: column; align-items: center; gap: 8px;
  color: rgba(255,255,255,.4); font-size: 11px; letter-spacing: 3px;
}
.hero-scroll .line { width: 1px; height: 40px; background: linear-gradient(to bottom, rgba(255,255,255,.4), transparent); animation: scrollPulse 2s infinite; }
@keyframes scrollPulse { 0%,100%{opacity:.4;transform:scaleY(1)} 50%{opacity:1;transform:scaleY(1.3)} }

/* ---------- 卡片通用 ---------- */
.card {
  background: #fff; border: 1px solid var(--c-border); border-radius: var(--r-lg);
  padding: var(--space-8); transition: all var(--t-base) var(--ease);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--c-gray-300); }

/* ---------- 特性卡片 ---------- */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }
.feature-card {
  background: #fff; border: 1px solid var(--c-border); border-radius: var(--r-lg);
  padding: var(--space-8); transition: all var(--t-base) var(--ease);
  position: relative; overflow: hidden;
}
.feature-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--c-green-500), var(--c-blue-500));
  transform: scaleX(0); transform-origin: left; transition: transform var(--t-base) var(--ease);
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.feature-card:hover::before { transform: scaleX(1); }
.feature-card .icon {
  width: 52px; height: 52px; border-radius: var(--r-md);
  background: linear-gradient(135deg, rgba(16,185,129,.12), rgba(26,86,219,.08));
  color: var(--c-green-600); display: flex; align-items: center; justify-content: center;
  margin-bottom: var(--space-5);
}
.feature-card h4 { font-size: 19px; margin-bottom: var(--space-3); }
.feature-card p { color: var(--c-gray-500); font-size: 14.5px; line-height: 1.75; }

/* ---------- 关于 / 图文分栏 ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-16); align-items: center; }
.split.reverse { direction: rtl; }
.split.reverse > * { direction: ltr; }
.split-img { position: relative; border-radius: var(--r-xl); overflow: hidden; box-shadow: var(--shadow-xl); }
.split-img img { width: 100%; height: 480px; object-fit: cover; }
.split-img .badge {
  position: absolute; bottom: 24px; left: 24px; right: 24px;
  background: rgba(7,15,30,.85); backdrop-filter: blur(12px);
  color: #fff; padding: 16px 20px; border-radius: var(--r-md);
  font-size: 14px; display: flex; align-items: center; gap: 12px;
}
.split-img .badge .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--c-green-400); flex-shrink: 0; }

/* ---------- 时间轴 ---------- */
.timeline { position: relative; padding-left: 40px; }
.timeline::before {
  content: ""; position: absolute; left: 11px; top: 8px; bottom: 8px;
  width: 2px; background: linear-gradient(to bottom, var(--c-green-500), var(--c-blue-500), var(--c-gray-200));
}
.tl-item { position: relative; padding-bottom: var(--space-10); }
.tl-item:last-child { padding-bottom: 0; }
.tl-item .dot {
  position: absolute; left: -35px; top: 4px; width: 24px; height: 24px;
  border-radius: 50%; background: #fff; border: 3px solid var(--c-green-500);
  box-shadow: 0 0 0 5px rgba(16,185,129,.12);
}
.tl-item .year { font-family: var(--font-mono); font-size: 15px; font-weight: 700; color: var(--c-blue-600); letter-spacing: 1px; }
.tl-item .title { font-size: 18px; font-weight: 700; color: var(--c-gray-900); margin-top: 4px; }
.tl-item .desc { color: var(--c-gray-500); font-size: 14.5px; margin-top: 6px; }

/* ---------- 产品卡片 ---------- */
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }
.product-card {
  background: #fff; border: 1px solid var(--c-border); border-radius: var(--r-lg);
  overflow: hidden; transition: all var(--t-base) var(--ease);
  display: flex; flex-direction: column;
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-xl); border-color: var(--c-green-400); }
.product-card .pc-head {
  padding: var(--space-6) var(--space-6) var(--space-4);
  border-bottom: 1px solid var(--c-gray-100);
}
.product-card .pc-tags { display: flex; justify-content: space-between; align-items: center; margin-bottom: var(--space-4); }
.product-card .pc-mat {
  font-size: 12px; font-weight: 700; color: var(--c-blue-600);
  background: rgba(26,86,219,.08); padding: 4px 12px; border-radius: var(--r-full);
  letter-spacing: .5px;
}
.product-card .pc-flame { font-size: 11px; font-weight: 700; padding: 4px 10px; border-radius: var(--r-full); letter-spacing: .5px; }
.flame-v0 { background: #fee2e2; color: #dc2626; }
.flame-v2 { background: #ffedd5; color: #ea580c; }
.flame-hb { background: #f1f5f9; color: #64748b; }
.flame-none { background: #f8fafc; color: #94a3b8; }
.product-card .pc-model { font-size: 24px; font-weight: 800; color: var(--c-gray-900); font-family: var(--font-mono); letter-spacing: -.02em; }
.product-card .pc-name { font-size: 13px; color: var(--c-gray-500); margin-top: 2px; }
.product-card .pc-body { padding: var(--space-5) var(--space-6); flex: 1; }
.product-card .pc-specs { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-3) var(--space-4); }
.product-card .spec-item .k { font-size: 12px; color: var(--c-gray-400); }
.product-card .spec-item .v { font-size: 14px; font-weight: 700; color: var(--c-gray-800); font-family: var(--font-mono); }
.product-card .pc-features { display: flex; flex-wrap: wrap; gap: 6px; margin-top: var(--space-4); padding-top: var(--space-4); border-top: 1px dashed var(--c-gray-200); }
.product-card .pc-feat { font-size: 11.5px; color: var(--c-green-600); background: rgba(16,185,129,.08); padding: 3px 10px; border-radius: var(--r-full); font-weight: 500; }
.product-card .pc-foot { padding: var(--space-4) var(--space-6) var(--space-6); display: flex; gap: 10px; }
.product-card .pc-foot .btn { flex: 1; padding: 10px; font-size: 13.5px; }

/* ---------- 产品筛选 ---------- */
.products-layout { display: grid; grid-template-columns: 260px 1fr; gap: var(--space-10); align-items: start; }
.filter-panel {
  background: #fff; border: 1px solid var(--c-border); border-radius: var(--r-lg);
  padding: var(--space-6); position: sticky; top: calc(var(--nav-h) + 24px);
}
.filter-group { margin-bottom: var(--space-6); }
.filter-group:last-child { margin-bottom: 0; }
.filter-group h5 { font-size: 13px; color: var(--c-gray-900); margin-bottom: var(--space-3); letter-spacing: .5px; font-weight: 700; text-transform: uppercase; }
.filter-search {
  width: 100%; padding: 10px 14px; border-radius: var(--r-md);
  border: 1px solid var(--c-border); font-size: 14px; transition: border-color var(--t-fast);
}
.filter-search:focus { outline: none; border-color: var(--c-green-500); box-shadow: 0 0 0 3px rgba(16,185,129,.1); }
.chip {
  display: inline-block; padding: 6px 14px; margin: 0 6px 8px 0;
  border-radius: var(--r-full); border: 1px solid var(--c-border);
  background: #fff; color: var(--c-gray-600); font-size: 13px;
  cursor: pointer; transition: all var(--t-fast); user-select: none;
}
.chip:hover { border-color: var(--c-blue-400); color: var(--c-blue-600); }
.chip.active { background: var(--c-blue-600); border-color: var(--c-blue-600); color: #fff; }
.chip.feat.active { background: var(--c-green-500); border-color: var(--c-green-500); }
.filter-reset { font-size: 13px; color: var(--c-blue-600); cursor: pointer; background: none; border: 0; padding: 0; }
.filter-reset:hover { text-decoration: underline; }
.products-toolbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: var(--space-6); flex-wrap: wrap; gap: 12px; }
.products-toolbar .count { color: var(--c-gray-500); font-size: 14px; }
.products-toolbar .count b { color: var(--c-gray-900); }

/* ---------- 应用卡片 ---------- */
.app-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }
.app-card {
  position: relative; border-radius: var(--r-lg); overflow: hidden;
  background: var(--c-navy-700); color: #fff; min-height: 280px;
  display: flex; flex-direction: column; justify-content: flex-end;
  padding: var(--space-8); transition: all var(--t-base) var(--ease);
}
.app-card::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 30%, rgba(7,15,30,.85) 100%);
  z-index: 1;
}
.app-card::after {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(circle at 70% 30%, rgba(16,185,129,.2), transparent 60%);
  opacity: 0; transition: opacity var(--t-base); z-index: 1;
}
.app-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-xl); }
.app-card:hover::after { opacity: 1; }
.app-card .app-icon {
  position: absolute; top: 28px; right: 28px; z-index: 2;
  width: 48px; height: 48px; border-radius: var(--r-md);
  background: rgba(255,255,255,.1); backdrop-filter: blur(8px);
  display: flex; align-items: center; justify-content: center; color: var(--c-green-400);
}
.app-card .app-content { position: relative; z-index: 2; }
.app-card h4 { color: #fff; font-size: 20px; margin-bottom: var(--space-3); }
.app-card p { color: rgba(255,255,255,.7); font-size: 14px; line-height: 1.7; }
.app-card .app-mats { margin-top: var(--space-4); font-size: 12.5px; color: var(--c-green-400); font-weight: 600; letter-spacing: .5px; }

/* ---------- 数据/设备网格 ---------- */
.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-5); }
.stat-card {
  background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--r-lg); padding: var(--space-8) var(--space-6); text-align: center;
  transition: all var(--t-base);
}
.stat-card:hover { background: rgba(255,255,255,.08); border-color: rgba(16,185,129,.3); transform: translateY(-3px); }
.stat-card .num { font-size: 38px; font-weight: 800; color: var(--c-green-400); font-family: var(--font-display); line-height: 1; }
.stat-card .num .unit { font-size: 16px; color: rgba(255,255,255,.5); font-weight: 500; }
.stat-card .lbl { font-size: 14px; color: rgba(255,255,255,.7); margin-top: 10px; }

/* ---------- 品质流程 ---------- */
.qflow { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-4); margin-top: var(--space-10); }
.qflow-step {
  background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.12);
  border-radius: var(--r-md); padding: var(--space-6); position: relative;
}
.qflow-step .qcode { font-family: var(--font-mono); font-size: 22px; font-weight: 800; color: var(--c-green-400); }
.qflow-step .qname { font-size: 15px; color: #fff; margin-top: 4px; font-weight: 600; }
.qflow-step .qdesc { font-size: 12.5px; color: rgba(255,255,255,.55); margin-top: 6px; line-height: 1.6; }

/* ---------- 联系我们 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: var(--space-12); }
.contact-info-list { display: flex; flex-direction: column; gap: var(--space-6); }
.ci-item { display: flex; gap: var(--space-4); align-items: flex-start; }
.ci-item .icon {
  width: 48px; height: 48px; border-radius: var(--r-md); flex-shrink: 0;
  background: linear-gradient(135deg, rgba(16,185,129,.1), rgba(26,86,219,.06));
  color: var(--c-green-600); display: flex; align-items: center; justify-content: center;
}
.ci-item .label { font-size: 13px; color: var(--c-gray-400); letter-spacing: .5px; }
.ci-item .value { font-size: 16px; color: var(--c-gray-900); font-weight: 600; margin-top: 2px; }

.contact-form {
  background: #fff; border: 1px solid var(--c-border); border-radius: var(--r-xl);
  padding: var(--space-10); box-shadow: var(--shadow-md);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-5); }
.form-field { margin-bottom: var(--space-5); }
.form-field label { display: block; font-size: 13px; color: var(--c-gray-700); margin-bottom: 6px; font-weight: 600; }
.form-field label .req { color: #ef4444; }
.form-field input, .form-field textarea, .form-field select {
  width: 100%; padding: 12px 16px; border: 1px solid var(--c-border); border-radius: var(--r-md);
  font-size: 15px; color: var(--c-gray-800); background: var(--c-gray-50);
  transition: all var(--t-fast);
}
.form-field input:focus, .form-field textarea:focus, .form-field select:focus {
  outline: none; border-color: var(--c-green-500); background: #fff;
  box-shadow: 0 0 0 3px rgba(16,185,129,.1);
}
.form-field textarea { resize: vertical; min-height: 120px; }
.form-note { font-size: 12.5px; color: var(--c-gray-400); margin-top: var(--space-4); text-align: center; }

/* ---------- 新闻卡片 ---------- */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }
.news-card {
  background: #fff; border: 1px solid var(--c-border); border-radius: var(--r-lg);
  overflow: hidden; transition: all var(--t-base) var(--ease); cursor: pointer;
}
.news-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-xl); }
.news-card .news-img { height: 200px; background: linear-gradient(135deg, var(--c-navy-600), var(--c-navy-800)); position: relative; overflow: hidden; }
.news-card .news-img::after { content: ""; position: absolute; inset: 0; background: radial-gradient(circle at 30% 70%, rgba(16,185,129,.2), transparent 50%); }
.news-card .news-cat {
  position: absolute; top: 16px; left: 16px; z-index: 2;
  background: rgba(255,255,255,.15); backdrop-filter: blur(8px);
  color: #fff; font-size: 11px; font-weight: 600; padding: 4px 12px; border-radius: var(--r-full);
  letter-spacing: 1px;
}
.news-card .news-body { padding: var(--space-6); }
.news-card .news-date { font-size: 12px; color: var(--c-gray-400); font-family: var(--font-mono); }
.news-card h4 { font-size: 17px; margin: 8px 0; line-height: 1.4; }
.news-card p { font-size: 14px; color: var(--c-gray-500); line-height: 1.7; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* ---------- CTA 区块 ---------- */
.cta-band {
  position: relative; background: var(--c-navy-800); color: #fff;
  padding: var(--space-20) 0; overflow: hidden; text-align: center;
}
.cta-band::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 60% 80% at 20% 50%, rgba(16,185,129,.15), transparent),
    radial-gradient(ellipse 50% 70% at 80% 50%, rgba(26,86,219,.2), transparent);
}
.cta-band .container { position: relative; z-index: 2; }
.cta-band h2 { color: #fff; margin-bottom: var(--space-4); }
.cta-band p { color: rgba(255,255,255,.7); max-width: 560px; margin: 0 auto var(--space-10); font-size: 17px; }

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--c-navy-900); color: rgba(255,255,255,.6);
  padding: var(--space-20) 0 var(--space-8);
}
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: var(--space-10); margin-bottom: var(--space-16); }
.footer-brand .logo { width: 44px; height: 44px; object-fit: contain; margin-bottom: var(--space-4); }
.footer-brand .f-name { font-size: 20px; font-weight: 800; color: #fff; letter-spacing: 1px; }
.footer-brand .f-en { font-size: 11px; letter-spacing: 2px; color: rgba(255,255,255,.4); font-family: var(--font-mono); margin-top: 2px; }
.footer-brand p { font-size: 14px; line-height: 1.8; margin-top: var(--space-5); max-width: 320px; }
.footer-col h5 { color: #fff; font-size: 14px; margin-bottom: var(--space-5); letter-spacing: 1px; font-weight: 700; }
.footer-col ul li { margin-bottom: var(--space-3); }
.footer-col ul li a { font-size: 14px; color: rgba(255,255,255,.55); transition: color var(--t-fast); }
.footer-col ul li a:hover { color: var(--c-green-400); }
.footer-contact li { font-size: 14px; margin-bottom: var(--space-3); display: flex; gap: 8px; align-items: flex-start; }
.footer-contact li .ic { color: var(--c-green-400); flex-shrink: 0; margin-top: 2px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08); padding-top: var(--space-8);
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px;
  font-size: 13px; color: rgba(255,255,255,.4);
}
.footer-bottom .slogan { color: var(--c-green-400); font-weight: 600; letter-spacing: 1px; }
.footer-beian { border-top: 1px solid rgba(255,255,255,.06); padding-top: var(--space-4); margin-top: var(--space-4); text-align: center; font-size: 12px; color: rgba(255,255,255,.3); }
.footer-beian a { color: rgba(255,255,255,.4); text-decoration: none; transition: color .2s; }
.footer-beian a:hover { color: rgba(255,255,255,.6); }
.footer-beian .beian-sep { margin: 0 8px; opacity: .4; }
.footer-beian img { vertical-align: middle; }

/* ---------- 返回顶部 ---------- */
.back-top {
  position: fixed; right: 28px; bottom: 28px; z-index: 900;
  width: 48px; height: 48px; border-radius: 50%;
  background: var(--c-navy-800); color: #fff; border: 1px solid rgba(255,255,255,.1);
  display: flex; align-items: center; justify-content: center; font-size: 18px;
  cursor: pointer; opacity: 0; transform: translateY(16px); pointer-events: none;
  transition: all var(--t-base) var(--ease); box-shadow: var(--shadow-lg);
}
.back-top.show { opacity: 1; transform: none; pointer-events: auto; }
.back-top:hover { background: var(--c-green-600); transform: translateY(-3px); }

/* ---------- 滚动显现动画 ---------- */
.reveal { opacity: 0; transform: translateY(30px); transition: opacity .7s var(--ease), transform .7s var(--ease); will-change: opacity, transform; }
.reveal.visible { opacity: 1; transform: none; }
.reveal-delay-1 { transition-delay: .1s; }
.reveal-delay-2 { transition-delay: .2s; }
.reveal-delay-3 { transition-delay: .3s; }

/* ---------- 产品详情页 ---------- */
.product-detail-hero {
  padding: calc(var(--nav-h) + 60px) 0 var(--space-16);
  background: linear-gradient(135deg, var(--c-navy-800), var(--c-navy-700));
  color: #fff; position: relative; overflow: hidden;
}
.product-detail-hero::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(ellipse 70% 60% at 85% 30%, rgba(16,185,129,.18), transparent);
}
.product-detail-hero .container { position: relative; z-index: 2; }
.pd-model { font-family: var(--font-mono); font-size: 48px; font-weight: 800; color: #fff; letter-spacing: -.02em; }
.pd-meta { display: flex; gap: var(--space-6); margin-top: var(--space-5); flex-wrap: wrap; }
.pd-meta-item { display: flex; flex-direction: column; }
.pd-meta-item .k { font-size: 12px; color: rgba(255,255,255,.5); letter-spacing: 1px; }
.pd-meta-item .v { font-size: 16px; color: #fff; font-weight: 600; margin-top: 2px; }

.dsheet-table { width: 100%; border-collapse: collapse; margin-top: var(--space-4); }
.dsheet-table caption { text-align: left; font-weight: 700; color: var(--c-gray-900); font-size: 16px; padding: var(--space-4) 0 var(--space-3); border-bottom: 2px solid var(--c-gray-900); }
.dsheet-table th, .dsheet-table td { border: 1px solid var(--c-border); padding: 12px 16px; font-size: 14px; text-align: left; }
.dsheet-table th { background: var(--c-gray-50); color: var(--c-gray-700); font-weight: 600; width: 45%; }
.dsheet-table td { font-family: var(--font-mono); color: var(--c-gray-800); }

/* ---------- 空状态 ---------- */
.no-result { grid-column: 1/-1; text-align: center; padding: 80px 0; color: var(--c-gray-400); }
.no-result .icon { font-size: 48px; margin-bottom: 16px; opacity: .5; }

/* ---------- 通用组件：浅色数据卡 ---------- */
.stat-card-light {
  background: #fff; border: 1px solid var(--c-border);
}
.stat-card-light .num { color: var(--c-blue-600); }
.stat-card-light .lbl { color: var(--c-gray-600); }
.stat-card-light .num .unit { color: var(--c-gray-400); }

/* ---------- 通用组件：深色渐变卡 ---------- */
.card-dark {
  background: linear-gradient(160deg, var(--c-navy-600), var(--c-navy-800));
  border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--r-lg);
  padding: 40px 32px;
  transition: all var(--t-base) var(--ease);
}
.card-dark:hover { transform: translateY(-4px); border-color: rgba(16,185,129,.3); }
.card-dark .card-label {
  font-family: var(--font-mono); letter-spacing: 3px;
  color: var(--c-green-400); font-size: 13px; font-weight: 600;
}
.card-dark h4 { color: #fff; font-size: 22px; margin: 14px 0 12px; line-height: 1.4; }
.card-dark p { color: rgba(255,255,255,.7); font-size: 15px; line-height: 1.8; }

/* ---------- 通用组件：顶部色条卡 ---------- */
.card-accent { border-top: 3px solid var(--c-blue-600); }
.card-accent.green { border-top-color: var(--c-green-600); }
.card-accent.amber { border-top-color: var(--c-amber-500); }
.card-accent .card-meta {
  font-family: var(--font-mono); font-size: 13px;
  color: var(--c-blue-600); font-weight: 700; letter-spacing: 1px;
}
.card-accent.green .card-meta { color: var(--c-green-600); }
.card-accent.amber .card-meta { color: var(--c-amber-500); }
.card-accent .card-foot {
  margin-top: 16px; padding-top: 16px;
  border-top: 1px solid var(--c-border);
  font-size: 13px; color: var(--c-gray-500);
}
.card-accent .card-foot div { margin-bottom: 4px; }
.card-accent .card-foot div:last-child { margin-bottom: 0; }

/* ---------- 通用组件：标签药丸 ---------- */
.tag-pill {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; border-radius: var(--r-full);
  font-size: 13px; font-weight: 600; margin-bottom: 20px;
}
.tag-pill.blue { background: rgba(26,86,219,.1); color: var(--c-blue-600); }
.tag-pill.green { background: rgba(16,185,129,.1); color: var(--c-green-600); }
.tag-pill.amber { background: rgba(245,158,11,.1); color: var(--c-amber-500); }

/* ---------- 通用组件：信息小卡 ---------- */
.info-box {
  background: #fff; border: 1px solid var(--c-border);
  border-radius: var(--r-md); padding: 20px;
}
.info-box .info-label { font-size: 13px; color: var(--c-gray-400); margin-bottom: 4px; }
.info-box .info-value { font-size: 15px; font-weight: 600; color: var(--c-gray-900); }

/* ---------- 通用组件：亮点框 ---------- */
.highlight-box {
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--r-lg); padding: 40px;
}
.highlight-box .hb-title {
  color: var(--c-green-400); font-size: 14px;
  letter-spacing: 2px; margin-bottom: 24px; font-weight: 600;
}
.highlight-box .hb-grid { display: grid; gap: 20px; }
.highlight-box .hb-item { display: flex; gap: 14px; align-items: flex-start; }
.highlight-box .hb-item .check { color: var(--c-green-400); flex-shrink: 0; font-size: 18px; margin-top: 1px; }
.highlight-box .hb-item span { color: rgba(255,255,255,.88); font-size: 15px; }
.highlight-box .hb-item b { color: #fff; }

/* ---------- 通用组件：交付能力表 ---------- */
.delivery-table {
  max-width: 900px; margin: 0 auto;
  background: #fff; border: 1px solid var(--c-border);
  border-radius: var(--r-lg); overflow: hidden;
  box-shadow: var(--shadow-md);
}
.delivery-table .dt-header {
  display: grid; grid-template-columns: repeat(4, 1fr);
  background: var(--c-navy-800); color: #fff;
}
.delivery-table .dt-header > div {
  padding: 20px; text-align: center;
  border-right: 1px solid rgba(255,255,255,.1);
}
.delivery-table .dt-header > div:last-child { border-right: none; }
.delivery-table .dt-header .k { font-size: 12px; letter-spacing: 1px; color: rgba(255,255,255,.5); }
.delivery-table .dt-header .v { font-size: 20px; font-weight: 800; color: var(--c-green-400); margin-top: 4px; }
.delivery-table .dt-body { padding: 32px; }
.delivery-table .dt-body-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; text-align: center; }
.delivery-table .dt-body-grid .t { font-size: 14px; font-weight: 700; color: var(--c-gray-900); margin-bottom: 6px; }
.delivery-table .dt-body-grid .d { font-size: 13px; color: var(--c-gray-500); }

/* ---------- 通用组件：图标特性项 ---------- */
.feature-icon-item {
  display: flex; gap: 12px; align-items: flex-start;
}
.feature-icon-item .fii-icon {
  width: 40px; height: 40px; border-radius: var(--r-md);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.feature-icon-item .fii-icon.green { background: rgba(16,185,129,.1); color: var(--c-green-600); }
.feature-icon-item .fii-icon.blue { background: rgba(26,86,219,.1); color: var(--c-blue-600); }
.feature-icon-item .fii-title { font-weight: 700; color: var(--c-gray-900); font-size: 15px; }
.feature-icon-item .fii-desc { font-size: 13px; color: var(--c-gray-400); margin-top: 2px; }

/* ---------- V3.3 滚动进度条 ---------- */
.scroll-progress {
  position: fixed; top: 0; left: 0; height: 3px; width: 0%;
  background: linear-gradient(90deg, var(--c-green-500), var(--c-blue-500));
  z-index: 9999; transition: width .1s linear;
  box-shadow: 0 0 8px rgba(16,185,129,.4);
}

/* ---------- V3.3 数字滚动动画 ---------- */
.num-animate {
  display: inline-block; font-variant-numeric: tabular-nums;
}

/* ---------- V3.3 已选筛选条件展示 ---------- */
.active-filters {
  display: flex; flex-wrap: wrap; gap: 8px; align-items: center;
  margin-bottom: 16px; min-height: 0;
}
.active-filters:empty { display: none; }
.active-filters .af-label {
  font-size: 13px; color: var(--c-gray-400); font-weight: 600;
}
.active-filters .af-tag {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px 4px 12px; border-radius: var(--r-full);
  background: rgba(26,86,219,.08); color: var(--c-blue-600);
  font-size: 12px; font-weight: 600; cursor: pointer;
  transition: all .2s ease;
}
.active-filters .af-tag:hover { background: rgba(26,86,219,.15); }
.active-filters .af-tag .remove {
  display: inline-flex; align-items: center; justify-content: center;
  width: 14px; height: 14px; border-radius: 50%;
  background: rgba(26,86,219,.15); font-size: 10px; line-height: 1;
}
.active-filters .af-clear {
  font-size: 12px; color: var(--c-gray-400); cursor: pointer;
  text-decoration: underline; margin-left: 4px;
}
.active-filters .af-clear:hover { color: var(--c-gray-600); }

/* ---------- V3.3 地图占位可点击 ---------- */
.map-placeholder {
  cursor: pointer; transition: all .3s ease; position: relative; overflow: hidden;
}
.map-placeholder:hover { transform: scale(1.01); box-shadow: var(--shadow-lg); }
.map-placeholder::after {
  content: "点击查看地图 →"; position: absolute; bottom: 16px; right: 16px;
  background: rgba(10,22,40,.85); color: #fff; padding: 8px 16px;
  border-radius: var(--r-full); font-size: 13px; font-weight: 600;
  backdrop-filter: blur(4px); opacity: 0; transition: opacity .3s ease;
}
.map-placeholder:hover::after { opacity: 1; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .feature-grid, .product-grid, .app-grid, .news-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .qflow { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--space-10); }
  .split { gap: var(--space-10); }
}
@media (max-width: 768px) {
  .nav-menu { display: none; position: absolute; top: var(--nav-h); left: 0; right: 0;
    background: #fff; flex-direction: column; padding: var(--space-6); gap: 4px;
    box-shadow: var(--shadow-lg); border-top: 1px solid var(--c-border);
  }
  .nav-menu.open { display: flex; }
  .nav-menu a { color: var(--c-gray-700) !important; padding: 12px 16px; border-radius: var(--r-md); }
  .nav-menu a:hover { background: var(--c-gray-50); }
  .nav-cta { display: none; }
  .nav-toggle { display: flex; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: var(--space-6); }
  .hero-stat { border-right: none; padding-right: 0; }
  .split, .split.reverse { grid-template-columns: 1fr; gap: var(--space-10); direction: ltr; }
  .split-img img { height: 320px; }
  .products-layout { grid-template-columns: 1fr; }
  .filter-panel { position: static; }
  .contact-grid { grid-template-columns: 1fr; gap: var(--space-10); }
  .form-row { grid-template-columns: 1fr; }
  .feature-grid, .product-grid, .app-grid, .news-grid, .stat-grid, .qflow { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: var(--space-10); }
  .section { padding: var(--space-16) 0; }
  .hero { min-height: auto; padding: var(--space-24) 0 var(--space-16); }
  .pd-model { font-size: 32px; }
  .highlight-box .hb-grid { grid-template-columns: 1fr; }
  .delivery-table .dt-header { grid-template-columns: repeat(2, 1fr); }
  .delivery-table .dt-header > div:nth-child(2) { border-right: none; }
  .delivery-table .dt-body-grid { grid-template-columns: 1fr; gap: 16px; }
  .card-dark { padding: 28px 24px; }
}
@media (max-width: 480px) {
  .hero h1 { font-size: 32px; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }
  .container { padding: 0 var(--space-4); }
}

/* ---------- 减少动画偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}

/* ============================================================
   V3.0 新增组件样式
   ============================================================ */

/* ---------- 信任资产条（认证 / 实力） ---------- */
.trust-strip {
  background: var(--c-navy-900);
  border-top: 1px solid rgba(255,255,255,.06);
  padding: var(--space-12) 0;
}
.trust-strip .container { display: flex; flex-wrap: wrap; gap: var(--space-6); justify-content: space-between; align-items: stretch; }
.trust-badge {
  flex: 1 1 160px; min-width: 150px;
  display: flex; align-items: center; gap: 14px;
  padding: 18px 20px; border-radius: var(--r-md);
  background: rgba(255,255,255,.04); border: 1px solid rgba(255,255,255,.08);
  transition: all var(--t-base) var(--ease);
}
.trust-badge:hover { background: rgba(255,255,255,.07); border-color: rgba(16,185,129,.3); transform: translateY(-3px); }
.trust-badge .tb-icon {
  width: 44px; height: 44px; border-radius: var(--r-md); flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, rgba(16,185,129,.18), rgba(26,86,219,.12));
  color: var(--c-green-400);
}
.trust-badge .tb-text .tb-t { color: #fff; font-weight: 700; font-size: 15px; line-height: 1.3; }
.trust-badge .tb-text .tb-s { color: rgba(255,255,255,.55); font-size: 12.5px; margin-top: 2px; }

/* ---------- 客户案例 ---------- */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }
.case-card {
  background: #fff; border: 1px solid var(--c-border); border-radius: var(--r-lg);
  padding: var(--space-8); display: flex; flex-direction: column;
  transition: all var(--t-base) var(--ease); position: relative; overflow: hidden;
}
.case-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--c-green-500), var(--c-blue-500));
  transform: scaleX(0); transform-origin: left; transition: transform var(--t-base) var(--ease);
}
.case-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.case-card:hover::before { transform: scaleX(1); }
.case-card.featured { border-color: var(--c-green-500); box-shadow: 0 10px 30px rgba(16,185,129,.1); }
.case-card.featured::before { transform: scaleX(1); background: linear-gradient(90deg, var(--c-green-500), var(--c-green-600)); }
.case-card.featured .cc-tag { color: var(--c-green-700); background: rgba(16,185,129,.1); }
.case-card .cc-tag {
  display: inline-flex; align-items: center; gap: 6px; align-self: flex-start;
  font-size: 12px; font-weight: 700; color: var(--c-blue-600);
  background: rgba(26,86,219,.08); padding: 5px 12px; border-radius: var(--r-full); margin-bottom: var(--space-4);
}
.case-card h4 { font-size: 18px; margin-bottom: var(--space-3); }
.case-card p { color: var(--c-gray-500); font-size: 14px; line-height: 1.75; flex: 1; }
.case-card .cc-meta { margin-top: var(--space-5); padding-top: var(--space-4); border-top: 1px dashed var(--c-gray-200); display: flex; gap: 16px; flex-wrap: wrap; }
.case-card .cc-meta .cm { font-size: 12.5px; color: var(--c-gray-400); }
.case-card .cc-meta .cm b { color: var(--c-green-600); }

/* ---------- 认证专区（案例页） ---------- */
.cert-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-5); }
.cert-card {
  background: #fff; border: 1px solid var(--c-border); border-radius: var(--r-lg);
  padding: var(--space-8) var(--space-6); text-align: center;
  transition: all var(--t-base) var(--ease);
}
.cert-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--c-green-400); }
.cert-card .cert-ic {
  width: 56px; height: 56px; border-radius: 50%; margin: 0 auto var(--space-4);
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, rgba(16,185,129,.12), rgba(26,86,219,.08)); color: var(--c-green-600);
}
.cert-card .cert-name { font-weight: 700; color: var(--c-gray-900); font-size: 16px; }
.cert-card .cert-desc { font-size: 13px; color: var(--c-gray-500); margin-top: 6px; line-height: 1.6; }

/* ---------- 合作伙伴 Logo 墙 ---------- */
.logo-wall { display: grid; grid-template-columns: repeat(5, 1fr); gap: var(--space-4); }
.logo-wall .lw-item {
  background: #fff; border: 1px solid var(--c-border); border-radius: var(--r-md);
  height: 92px; display: flex; align-items: center; justify-content: center;
  color: var(--c-gray-400); font-weight: 700; font-size: 15px; letter-spacing: .5px;
  transition: all var(--t-base) var(--ease);
}
.logo-wall .lw-item:hover { border-color: var(--c-green-400); color: var(--c-green-600); transform: translateY(-3px); }

/* ---------- 选材助手 ---------- */
.selector-panel {
  background: linear-gradient(160deg, var(--c-navy-700), var(--c-navy-800));
  border-radius: var(--r-xl); padding: var(--space-12);
  color: #fff; position: relative; overflow: hidden;
}
.selector-panel::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(circle at 85% 15%, rgba(16,185,129,.18), transparent 55%);
}
.selector-panel > * { position: relative; z-index: 2; }
.selector-panel h3 { color: #fff; font-size: 24px; }
.selector-panel .sp-sub { color: rgba(255,255,255,.7); margin-top: 8px; font-size: 15px; }
.selector-row { display: grid; grid-template-columns: 200px 1fr; gap: var(--space-5); align-items: center; margin-top: var(--space-8); }
.selector-row .sr-label { font-size: 14px; color: rgba(255,255,255,.85); font-weight: 600; }
.selector-row select {
  width: 100%; padding: 13px 16px; border-radius: var(--r-md);
  border: 1px solid rgba(255,255,255,.18); background: rgba(255,255,255,.06);
  color: #fff; font-size: 15px;
}
.selector-row select:focus { outline: none; border-color: var(--c-green-400); }
.selector-row select option { color: #0f172a; }
.selector-actions { margin-top: var(--space-8); display: flex; gap: 14px; flex-wrap: wrap; }
.selector-result { margin-top: var(--space-8); }
.selector-result .sr-title { font-size: 14px; color: var(--c-green-400); font-weight: 700; margin-bottom: 14px; letter-spacing: 1px; }
.selector-result .sr-empty { color: rgba(255,255,255,.55); font-size: 14px; }
.selector-chips { display: flex; flex-wrap: wrap; gap: 10px; }
.selector-chips .sc {
  background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.15);
  border-radius: var(--r-full); padding: 8px 16px; font-size: 14px; color: #fff;
  display: inline-flex; align-items: center; gap: 8px;
}
.selector-chips .sc b { color: var(--c-green-400); font-family: var(--font-mono); }
.selector-chips .sc a { color: var(--c-blue-400); font-size: 13px; text-decoration: underline; }

/* ---------- 悬浮快捷询盘 ---------- */
#fabContact {
  position: fixed; right: 24px; bottom: 96px; z-index: 950;
  display: flex; flex-direction: column; gap: 12px;
}
.fab-item {
  width: 52px; height: 52px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: #fff; box-shadow: var(--shadow-lg);
  transition: all var(--t-base) var(--ease);
}
.fab-item:hover { transform: translateY(-3px) scale(1.05); }
.fab-chat { background: linear-gradient(135deg, var(--c-green-500), var(--c-green-600)); }
.fab-wa { background: linear-gradient(135deg, #25d366, #128c7e); }
@media (max-width: 768px) { #fabContact { right: 16px; bottom: 84px; } .fab-item { width: 48px; height: 48px; } }

/* ---------- 表单提交提示 ---------- */
.form-toast {
  margin-top: var(--space-4); padding: 12px 16px; border-radius: var(--r-md);
  background: rgba(16,185,129,.12); border: 1px solid rgba(16,185,129,.4);
  color: #059669; font-size: 13.5px; opacity: 0; transform: translateY(6px);
  transition: all var(--t-base) var(--ease); pointer-events: none;
}
.form-toast.show { opacity: 1; transform: none; }

/* ---------- 响应式：V3 新组件 ---------- */
@media (max-width: 1024px) {
  .case-grid { grid-template-columns: repeat(2, 1fr); }
  .cert-grid { grid-template-columns: repeat(2, 1fr); }
  .logo-wall { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 768px) {
  .trust-strip .container { gap: var(--space-4); }
  .trust-badge { flex: 1 1 45%; }
  .case-grid { grid-template-columns: 1fr; }
  .cert-grid { grid-template-columns: 1fr 1fr; }
  .logo-wall { grid-template-columns: repeat(2, 1fr); }
  .selector-panel { padding: var(--space-8) var(--space-6); }
  .selector-row { grid-template-columns: 1fr; gap: var(--space-3); align-items: stretch; }
}

/* ---------- V3.3 打印样式（产品详情页物性表） ---------- */
@media print {
  .site-nav, .site-footer, .back-top, #fabContact, .scroll-progress,
  .hero-scroll, .pd-actions, .related-section, .page-hero .breadcrumb,
  .hero-actions, .hero-scroll, .section-alt { display: none !important; }
  body { background: #fff; color: #000; font-size: 12pt; }
  .container { max-width: 100%; padding: 0; }
  .section { padding: 20px 0; }
  .dsheet-table { box-shadow: none; border: 1px solid #ccc; }
  .dsheet-table th, .dsheet-table td { border-color: #999; color: #000; }
  .product-detail-hero { background: #fff !important; padding: 20px 0; }
  .product-detail-hero * { color: #000 !important; }
  a { text-decoration: none; color: #000; }
  .reveal { opacity: 1 !important; transform: none !important; }
}

/* ============================================================
   V3.5 行业解决方案与对标优化
   ============================================================ */

/* ---------- 行业解决方案卡片 ---------- */
.industry-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
  margin-top: var(--space-10);
}
.industry-card {
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: var(--space-7);
  transition: all var(--t-base) var(--ease);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.industry-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--c-green-500), var(--c-blue-500));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t-base) var(--ease);
}
.industry-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.industry-card:hover::before { transform: scaleX(1); }
.industry-card .ic-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: var(--space-4);
}
.industry-card .ic-icon {
  width: 44px; height: 44px;
  border-radius: var(--r-md);
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, rgba(16,185,129,.12), rgba(26,86,219,.08));
  color: var(--c-green-600);
  flex-shrink: 0;
}
.industry-card .ic-icon svg { width: 22px; height: 22px; }
.industry-card h4 {
  font-size: 17px;
  font-weight: 700;
  color: var(--c-navy-900);
  margin: 0;
}
.industry-card .ic-parts {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: var(--space-4);
}
.industry-card .ic-part {
  font-size: 12px;
  color: var(--c-gray-500);
  background: var(--c-gray-50);
  padding: 4px 10px;
  border-radius: var(--r-full);
}
.industry-card .ic-mats {
  margin-top: auto;
  padding-top: var(--space-4);
  border-top: 1px dashed var(--c-gray-200);
  font-size: 12.5px;
  color: var(--c-gray-400);
}
.industry-card .ic-mats b {
  color: var(--c-green-700);
  font-weight: 600;
}

/* ---------- 应用详情页：行业区块 ---------- */
.app-industry-block {
  margin-bottom: var(--space-16);
}
.app-industry-block:last-child { margin-bottom: 0; }
.aib-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-5);
  border-bottom: 2px solid var(--c-gray-100);
}
.aib-icon {
  width: 52px; height: 52px;
  border-radius: var(--r-md);
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--c-green-500), var(--c-blue-500));
  color: #fff;
  flex-shrink: 0;
}
.aib-icon svg { width: 26px; height: 26px; }
.aib-title h3 {
  font-size: 24px;
  font-weight: 700;
  color: var(--c-navy-900);
  margin: 0 0 4px;
}
.aib-title p {
  font-size: 14.5px;
  color: var(--c-gray-500);
  margin: 0;
}
.aib-scenarios {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}
.aib-scenario {
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  padding: var(--space-6);
  transition: all var(--t-base) var(--ease);
}
.aib-scenario:hover {
  border-color: var(--c-green-400);
  box-shadow: var(--shadow-md);
}
.aib-scenario h5 {
  font-size: 15px;
  font-weight: 600;
  color: var(--c-navy-900);
  margin: 0 0 8px;
}
.aib-scenario p {
  font-size: 13px;
  color: var(--c-gray-500);
  line-height: 1.7;
  margin: 0 0 12px;
}
.aib-scenario .as-mat {
  font-size: 12px;
  color: var(--c-green-700);
  font-weight: 600;
  background: rgba(16,185,129,.08);
  padding: 4px 10px;
  border-radius: var(--r-full);
  display: inline-block;
}

/* ============================================================
   V3.4 移动端视觉专项优化
   ============================================================ */

/* ---------- 移动端通用：触控目标与排版 ---------- */
@media (max-width: 768px) {
  /* 按钮最小触控高度 44px */
  .btn { min-height: 44px; padding: 0 20px; font-size: 14px; }
  .btn-sm { min-height: 36px; padding: 0 14px; font-size: 13px; }

  /* Section 标题字号优化 */
  .section-head h2 { font-size: 26px; line-height: 1.3; }
  .section-head p { font-size: 14.5px; }
  .eyebrow { font-size: 11px; letter-spacing: 2px; }

  /* Hero 区域精细优化 */
  .hero h1 { font-size: 34px; line-height: 1.25; letter-spacing: -.01em; }
  .hero .lead { font-size: 14.5px; line-height: 1.8; }
  .hero-actions { gap: 10px; }
  .hero-stat .num { font-size: 26px; }
  .hero-stat .lbl { font-size: 12px; }
  .hero-stats { gap: var(--space-4); padding-top: var(--space-6); }

  /* 页面头部（内页） */
  .page-hero h1 { font-size: 28px; }
  .page-hero .lead { font-size: 14.5px; }
  .breadcrumb { font-size: 12.5px; }

  /* 卡片内边距收窄 */
  .feature-card, .product-card, .app-card, .news-card { padding: 20px; }
  .feature-card h4 { font-size: 17px; }
  .feature-card p { font-size: 13.5px; line-height: 1.75; }
  .product-card .pc-model { font-size: 18px; }

  /* 数据卡 */
  .stat-card { padding: 18px 16px; }
  .stat-card .num { font-size: 24px; }
  .stat-card .lbl { font-size: 12.5px; }

  /* 时间轴移动端：单列居中布局 */
  .timeline { padding-left: 0; }
  .timeline::before { left: 20px; }
  .tl-item { padding-left: 52px; position: relative; }
  .tl-item .dot { left: 12px; top: 4px; }
  .tl-item .year { font-size: 18px; }
  .tl-item .title { font-size: 15px; }
  .tl-item .desc { font-size: 13px; }

  /* 产品物性表：横向滚动容器 */
  .dsheet-table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 0 -16px; padding: 0 16px; }
  .dsheet-table { min-width: 480px; font-size: 13px; }
  .dsheet-table th, .dsheet-table td { padding: 10px 12px; }

  /* 产品详情页 */
  .pd-model { font-size: 28px; }
  .pd-meta { grid-template-columns: 1fr; gap: 10px; }
  .pd-meta-item { padding: 10px 14px; }
  .pd-layout { grid-template-columns: 1fr !important; gap: 32px !important; }
  .pd-layout > div:last-child { position: static !important; }

  /* 页脚优化 */
  .site-footer { padding: var(--space-12) 0 var(--space-8); }
  .footer-brand p { font-size: 13.5px; }
  .footer-col h5 { font-size: 14px; }
  .footer-col li a { font-size: 13.5px; padding: 4px 0; }
  .footer-contact li { font-size: 13px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; font-size: 12px; }

  /* 导航菜单遮罩 */
  .nav-overlay {
    display: none; position: fixed; inset: 0;
    background: rgba(10,22,40,.5); z-index: 998;
    backdrop-filter: blur(2px);
  }
  .nav-overlay.show { display: block; }

  /* 导航菜单动画 */
  .nav-menu {
    transform: translateY(-10px); opacity: 0;
    transition: all .25s ease; pointer-events: none;
  }
  .nav-menu.open {
    transform: translateY(0); opacity: 1; pointer-events: auto;
  }

  /* 品牌文字：小屏隐藏英文副标 */
  .brand-en { display: none; }

  /* 信任资产条：2列但最后一个居中 */
  .trust-strip .container { justify-content: center; }
  .trust-badge { flex: 1 1 calc(50% - 8px); min-width: 0; padding: 14px 16px; }
  .trust-badge .tb-icon { width: 38px; height: 38px; }
  .trust-badge .tb-icon svg { width: 20px; height: 20px; }
  .trust-badge .tb-text .tb-t { font-size: 13.5px; }
  .trust-badge .tb-text .tb-s { font-size: 11.5px; }

  /* 应用卡片 */
  .app-card .app-icon { width: 44px; height: 44px; }
  .app-card h4 { font-size: 16px; }
  .app-card p { font-size: 13px; }

  /* 新闻卡片 */
  .news-card .news-img { height: 160px; }
  .news-card h4 { font-size: 15px; }
  .news-card p { font-size: 13px; }
  .news-meta { font-size: 11.5px; }

  /* 品质流程 */
  .qflow-step { padding: 20px 16px; }
  .qflow-step .step-num { font-size: 28px; }
  .qflow-step h4 { font-size: 15px; }
  .qflow-step p { font-size: 13px; }

  /* 研发检测设备 */
  .ci-item { padding: 16px; }
  .ci-item .icon { width: 40px; height: 40px; }
  .ci-item h4 { font-size: 14.5px; }
  .ci-item p { font-size: 12.5px; }

  /* 联系信息 */
  .ci-item .label { font-size: 12px; }
  .ci-item .value { font-size: 14px; }

  /* 表单 */
  .contact-form { padding: 24px 20px; }
  .form-field label { font-size: 13px; }
  .form-field input, .form-field select, .form-field textarea {
    font-size: 15px; /* 防止iOS缩放 */ min-height: 44px;
  }
  .form-field textarea { min-height: 100px; }

  /* 产品筛选面板 */
  .filter-panel { padding: 20px; }
  .filter-group h5 { font-size: 13px; }
  .chip { padding: 7px 14px; font-size: 12.5px; min-height: 34px; }
  .filter-search { min-height: 44px; font-size: 15px; }
  .filter-reset { min-height: 40px; font-size: 13px; }

  /* 智能选材器 */
  .selector-panel { padding: 24px 20px; }
  .selector-panel h3 { font-size: 20px; }
  .sel-result-card { padding: 16px; }

  /* 返回顶部与FAB间距优化 */
  .back-top { width: 42px; height: 42px; bottom: 20px; right: 20px; font-size: 18px; }
  #fabContact { right: 16px; bottom: 76px; gap: 10px; }
  .fab-item { width: 46px; height: 46px; }

  /* 交付能力表 */
  .delivery-table .dt-header > div { padding: 14px 10px; }
  .delivery-table .dt-header .v { font-size: 16px; }
  .delivery-table .dt-body { padding: 20px 16px; }
  .delivery-table .dt-body-grid .t { font-size: 13px; }
  .delivery-table .dt-body-grid .d { font-size: 12px; }

  /* 高亮框 */
  .highlight-box { padding: 24px 20px; }
  .highlight-box .hb-title { font-size: 12px; margin-bottom: 18px; }
  .highlight-box .hb-item span { font-size: 13.5px; }

  /* 深色卡 */
  .card-dark { padding: 24px 20px; }
  .card-dark h4 { font-size: 18px; }
  .card-dark p { font-size: 14px; }

  /* V3.5 行业解决方案 */
  .industry-grid { grid-template-columns: 1fr; gap: var(--space-4); }
  .industry-card { padding: 20px; }
  .industry-card h4 { font-size: 16px; }
  .industry-card .ic-icon { width: 40px; height: 40px; }
  .industry-card .ic-icon svg { width: 20px; height: 20px; }

  /* V3.5 应用详情页行业区块 */
  .aib-header { gap: 12px; margin-bottom: var(--space-6); }
  .aib-icon { width: 44px; height: 44px; }
  .aib-icon svg { width: 22px; height: 22px; }
  .aib-title h3 { font-size: 20px; }
  .aib-title p { font-size: 13.5px; }
  .aib-scenarios { grid-template-columns: 1fr; gap: var(--space-4); }
  .aib-scenario { padding: 16px; }

  /* 图片高度统一收窄 */
  .split-img img { height: 260px; }
}

/* ---------- 超小屏（≤480px）进一步优化 ---------- */
@media (max-width: 480px) {
  .container { padding: 0 16px; }

  .hero h1 { font-size: 28px; }
  .hero .lead { font-size: 13.5px; }
  .hero-stat .num { font-size: 22px; }
  .hero-stat .num .unit { font-size: 12px; }

  .section-head h2 { font-size: 22px; }
  .page-hero h1 { font-size: 24px; }
  .pd-model { font-size: 24px; }

  /* 信任资产条：单列全宽 */
  .trust-badge { flex: 1 1 100%; }

  /* 按钮全宽时的间距 */
  .hero-actions .btn { width: 100%; justify-content: center; }

  /* 产品卡片操作按钮堆叠 */
  .pc-foot { flex-direction: column; }
  .pc-foot .btn { width: 100%; justify-content: center; }

  /* 交付表头部2列可能仍挤，强制字号 */
  .delivery-table .dt-header .k { font-size: 10px; }
  .delivery-table .dt-header .v { font-size: 14px; }

  /* 导航品牌：只留中文 */
  .brand-cn { font-size: 15px; }
}

/* ---------- 超小屏（≤360px）极限适配 ---------- */
@media (max-width: 360px) {
  .container { padding: 0 14px; }
  .hero h1 { font-size: 25px; }
  .section-head h2 { font-size: 20px; }
  .feature-card, .product-card, .app-card, .news-card { padding: 16px; }
  .stat-card { padding: 14px 12px; }
  .stat-card .num { font-size: 20px; }
  .btn { padding: 0 16px; font-size: 13px; }
}

/* ---------- iPhone 安全区域适配 ---------- */
@supports (padding: max(0px)) {
  @media (max-width: 768px) {
    .site-nav { padding-top: max(0px, env(safe-area-inset-top)); }
    #fabContact { bottom: max(76px, calc(76px + env(safe-area-inset-bottom))); }
    .back-top { bottom: max(20px, calc(20px + env(safe-area-inset-bottom))); }
    .site-footer { padding-bottom: max(var(--space-8), calc(var(--space-8) + env(safe-area-inset-bottom))); }
  }
}