/* ==========================================================================
   胜拓光电 · 生命科学光学仪器官网样式
   主题色：深蓝科技 + 青色光谱 + 暖橙焦点
   响应式（断点：1024px / 768px / 480px）
   ========================================================================== */

/* ---------- 设计变量 ---------- */
:root {
  --color-primary: #1d4ed8;          /* 深科技蓝 */
  --color-primary-dark: #0e3a7a;     /* 加深（用于 hover/渐变） */
  --color-primary-light: #dbeafe;
  --color-accent: #06b6d4;           /* 青色（光学/光） */
  --color-accent-warm: #f59e0b;      /* 暖橙（焦点/生命） */
  --color-bg: #ffffff;
  --color-bg-alt: #f5f8fc;
  --color-text: #0f1d33;
  --color-text-muted: #5b6b85;
  --color-border: #e4e9f2;
  --shadow-sm: 0 1px 3px rgba(15, 29, 51, 0.08);
  --shadow-md: 0 8px 24px rgba(15, 29, 51, 0.10);
  --shadow-lg: 0 20px 50px rgba(15, 29, 51, 0.16);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --container: 1140px;
  --header-h: 72px;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}

/* ---------- 基础 ---------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 8px);
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }
ul { margin: 0; padding: 0; list-style: none; }

h1, h2, h3, h4 { line-height: 1.3; margin: 0 0 0.5em; }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- 通用组件 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 0.22s ease;
  white-space: nowrap;
  font-family: inherit;
}
.btn:focus-visible {
  outline: 3px solid var(--color-primary-light);
  outline-offset: 2px;
}
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-dark); text-decoration: none; transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-ghost { background: transparent; color: var(--color-text); border-color: var(--color-border); }
.btn-ghost:hover { border-color: var(--color-primary); color: var(--color-primary); text-decoration: none; }
.btn-lg { padding: 14px 30px; font-size: 16px; }
.btn-block { width: 100%; }

.section { padding: 96px 0; }
.section-alt { background: var(--color-bg-alt); }
.section-contact {
  background:
    radial-gradient(60% 60% at 90% 0%, rgba(6, 182, 212, 0.05) 0%, transparent 60%),
    linear-gradient(180deg, #ffffff 0%, var(--color-bg-alt) 100%);
}

.section-head { text-align: center; max-width: 700px; margin: 0 auto 56px; }
.section-eyebrow {
  display: inline-block;
  color: var(--color-primary);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.section-title { font-size: clamp(26px, 4vw, 36px); font-weight: 800; }
.section-desc { color: var(--color-text-muted); margin-top: 14px; font-size: 17px; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  z-index: 100;
  transition: box-shadow 0.25s ease, border-color 0.25s ease;
}
.site-header.scrolled {
  border-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 100%; }

.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--color-text); }
.brand:hover { text-decoration: none; }
.brand-mark {
  width: 38px; height: 38px;
  display: inline-flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  color: #fff; font-weight: 800; font-size: 19px;
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(29, 78, 216, 0.25);
}
.brand-text { font-size: 20px; font-weight: 800; letter-spacing: 0.5px; line-height: 1.2; display: flex; flex-direction: column; }
.brand-text small { font-size: 10px; font-weight: 700; color: var(--color-primary); letter-spacing: 1.5px; }

.main-nav { display: flex; align-items: center; gap: 26px; }
.nav-list { display: flex; gap: 26px; }
.nav-link {
  color: var(--color-text);
  font-weight: 500;
  font-size: 15px;
  padding: 6px 2px;
  position: relative;
}
.nav-link:hover { color: var(--color-primary); text-decoration: none; }
.nav-link::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  border-radius: 2px;
  transition: width 0.25s ease;
}
.nav-link:hover::after, .nav-link.active::after { width: 100%; }
.nav-link.active { color: var(--color-primary); }
.nav-cta { padding: 9px 18px; font-size: 14px; }

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px; height: 44px;
  padding: 10px;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  cursor: pointer;
}
.nav-toggle .bar {
  display: block;
  width: 100%; height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.2s ease;
}
.nav-toggle[aria-expanded="true"] .bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- 首屏 Hero ---------- */
.hero {
  position: relative;
  padding: 0 0 96px;             /* v5.1：去掉顶部留白，海报贴到页面顶端 */
  overflow: hidden;
  background: linear-gradient(180deg, #f8fbff 0%, #ffffff 60%);
}

/* v5.1：第 1 屏（品牌愿景海报）为全出血，贴齐页面顶端；
   第 2/3 屏不在海报上，需自行留出固定导航的高度，避免内容被导航遮住。 */
.hero-slide:not(.hero-slide--vision) { padding-top: calc(var(--header-h) + 80px); }
.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(29, 78, 216, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(29, 78, 216, 0.07) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, #000 30%, transparent 80%);
}
.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.55;
}
.hero-glow-1 {
  width: 520px; height: 520px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.35) 0%, transparent 70%);
  top: -100px; right: -80px;
}
.hero-glow-2 {
  width: 460px; height: 460px;
  background: radial-gradient(circle, rgba(29, 78, 216, 0.25) 0%, transparent 70%);
  bottom: -100px; left: -80px;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 56px;
  align-items: center;
}
.hero-eyebrow {
  display: inline-block;
  color: var(--color-primary);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 2px;
  padding: 6px 14px;
  background: var(--color-primary-light);
  border-radius: 20px;
  margin-bottom: 20px;
}
.hero-title { font-size: clamp(34px, 5.4vw, 56px); font-weight: 800; line-height: 1.22; letter-spacing: -0.5px; }
.hero-title em {
  font-style: normal;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-sub { color: var(--color-text-muted); font-size: 17.5px; margin: 20px 0 32px; max-width: 540px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 48px; }
.hero-stats { display: flex; gap: 40px; flex-wrap: wrap; }
.stat strong {
  display: block;
  font-size: 30px;
  font-weight: 800;
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.stat span { color: var(--color-text-muted); font-size: 14px; }

/* Hero 视觉卡片 */
.hero-visual { position: relative; min-height: 440px; }
.hero-card {
  position: absolute;
  background: #fff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 22px;
  border: 1px solid rgba(228, 233, 242, 0.6);
}
.hero-card-main {
  width: 320px;
  top: 20px; right: 0;
  border-top: 4px solid;
  border-image: linear-gradient(90deg, var(--color-primary), var(--color-accent)) 1;
  z-index: 2;
}
.hc-spectrum {
  display: flex;
  height: 28px;
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 14px;
  background: linear-gradient(90deg, #6366f1, #06b6d4 30%, #10b981 60%, #f59e0b 100%);
  position: relative;
}
.hc-spectrum::after {
  content: "";
  position: absolute; inset: 0;
  background: repeating-linear-gradient(90deg, transparent 0 12%, rgba(255,255,255,0.3) 12% 14%);
}
.hc-bar {
  height: 10px;
  border-radius: 5px;
  margin-bottom: 8px;
  background: linear-gradient(90deg, var(--color-primary-light), var(--color-primary));
  opacity: 0.85;
}
.hc-bar.w-95 { width: 95%; }
.hc-bar.w-72 { width: 72%; }
.hc-bar.w-84 { width: 84%; }
.hc-label {
  display: inline-block;
  margin-top: 8px;
  font-size: 13px;
  font-weight: 700;
  color: var(--color-primary-dark);
  background: var(--color-primary-light);
  padding: 4px 12px;
  border-radius: 20px;
}

.hero-card-side {
  width: 200px;
  left: 0; bottom: 80px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 1;
}
.hc-lens {
  position: relative;
  width: 64px; height: 64px;
  margin-bottom: 6px;
}
.lens-ring {
  position: absolute; inset: 0;
  border-radius: 50%;
  background: conic-gradient(from 45deg, var(--color-accent), var(--color-primary), var(--color-accent), var(--color-primary));
  padding: 6px;
}
.lens-core {
  position: absolute; inset: 8px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, rgba(255,255,255,0.9), var(--color-accent) 50%, var(--color-primary-dark) 100%);
  box-shadow: inset 0 0 8px rgba(0,0,0,0.2);
}
.hc-sub { font-size: 12px; color: var(--color-text-muted); }

.hero-card-mini {
  width: 160px;
  left: 60px; bottom: -10px;
  display: flex;
  align-items: center;
  gap: 10px;
  z-index: 3;
}
.hc-wave {
  font-size: 26px;
  font-weight: 700;
  color: var(--color-accent);
  font-family: serif;
  transform: rotate(15deg);
  display: inline-block;
}

/* ---------- 产品中心 ---------- */
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.service-card {
  position: relative;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
  overflow: hidden;
}
.service-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}
.service-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: var(--color-primary-light); }
.service-card:hover::before { transform: scaleX(1); }
.service-image {
  position: relative;
  margin: -32px -28px 20px;       /* 跨越卡片 padding，实现「通顶」效果 */
  width: calc(100% + 56px);
  aspect-ratio: 3 / 2;             /* 与图片源比例一致，避免 CLS */
  overflow: hidden;
  background: #eef2f7;             /* 占位底色，图片未加载时显示 */
}
.service-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s ease;
}
.service-card:hover .service-image img { transform: scale(1.06); }
.service-card h3 { font-size: 19px; margin-bottom: 10px; }
.service-card p { color: var(--color-text-muted); font-size: 15px; margin: 0 0 16px; }
.case-link { font-weight: 600; font-size: 14.5px; color: var(--color-primary); }
.case-link:hover { color: var(--color-accent); text-decoration: none; }

/* 产品卡结构化版式（v4.1：机型号标签 + 一句话定位 + 核心参数网格） */
.service-body { padding-top: 2px; }
.service-tag {
  display: inline-block;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--color-accent);
  background: rgba(6, 182, 212, 0.10);
  border: 1px solid rgba(6, 182, 212, 0.28);
  padding: 3px 12px;
  border-radius: 999px;
  margin-bottom: 12px;
}
.service-card h3 { font-size: 19px; margin-bottom: 8px; }
.service-card .service-lead {
  color: var(--color-text);
  font-size: 14.5px;
  font-weight: 500;
  line-height: 1.6;
  margin: 0 0 16px;
}
.service-specs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin: 0 0 18px;
  padding: 14px 0;
  border-top: 1px dashed var(--color-border);
  border-bottom: 1px dashed var(--color-border);
}
.service-specs li {
  display: flex;
  flex-direction: column;
  gap: 3px;
  text-align: center;
}
.service-specs strong {
  display: block;
  font-size: 15.5px;
  font-weight: 800;
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
}
.service-specs span {
  font-size: 11.5px;
  color: var(--color-text-muted);
  line-height: 1.3;
}

/* ---------- 解决方案 ---------- */
.solutions-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.solution-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  position: relative;
}
.solution-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.sol-icon {
  width: 52px; height: 52px;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 26px;
  background: linear-gradient(135deg, var(--color-accent), var(--color-primary));
  color: #fff;
  border-radius: 14px;
  margin-bottom: 18px;
  box-shadow: 0 4px 12px rgba(6, 182, 212, 0.25);
}
.solution-card h3 { font-size: 18px; margin-bottom: 10px; }
.solution-card p { color: var(--color-text-muted); font-size: 15px; margin: 0 0 16px; }
.sol-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.sol-tags li {
  font-size: 12.5px;
  color: var(--color-primary-dark);
  background: var(--color-primary-light);
  padding: 3px 10px;
  border-radius: 12px;
  font-weight: 600;
}

/* ---------- 应用案例 ---------- */
.cases-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.case-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.case-cover {
  position: relative;
  height: 170px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.case-cover::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 30% 40%, rgba(255,255,255,0.4) 0%, transparent 50%),
    radial-gradient(circle at 80% 60%, rgba(255,255,255,0.2) 0%, transparent 50%);
}
.case-cover-1 { background: linear-gradient(135deg, #1d4ed8 0%, #06b6d4 100%); }
.case-cover-2 { background: linear-gradient(135deg, #7c3aed 0%, #1d4ed8 100%); }
.case-cover-3 { background: linear-gradient(135deg, #0d9488 0%, #06b6d4 100%); }
.case-cover::after {
  content: "🔬";
  position: absolute;
  font-size: 60px;
  opacity: 0.35;
  z-index: 0;
}
.case-body { padding: 24px; }
.case-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  color: var(--color-primary-dark);
  background: var(--color-primary-light);
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 12px;
}
.case-body h3 { font-size: 17px; }
.case-body p { color: var(--color-text-muted); font-size: 14.5px; margin-bottom: 14px; }
.case-link { font-weight: 600; font-size: 14.5px; }

.case-tags-wrap {
  margin-top: 56px;
  text-align: center;
  padding: 40px 24px;
  background: linear-gradient(135deg, #f0f7ff 0%, #e0f2fe 100%);
  border-radius: var(--radius-lg);
}
.case-tags-wrap h3 { font-size: 18px; color: var(--color-text); margin-bottom: 20px; }
.case-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}
.case-tags li {
  font-size: 13.5px;
  color: var(--color-primary-dark);
  background: #fff;
  padding: 8px 16px;
  border-radius: 20px;
  font-weight: 600;
  border: 1px solid var(--color-border);
  transition: all 0.2s ease;
}
.case-tags li:hover { background: var(--color-primary); color: #fff; border-color: var(--color-primary); transform: translateY(-2px); }

/* ---------- 关于我们 ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 56px;
  align-items: start;
}
.about-text p { color: var(--color-text-muted); margin-bottom: 16px; }
.about-points li {
  position: relative;
  padding: 12px 0 12px 34px;
  border-bottom: 1px dashed var(--color-border);
  font-size: 15px;
}
.about-points li::before {
  content: "";
  position: absolute;
  left: 8px; top: 21px;
  width: 9px; height: 9px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
}
.about-points strong { display: block; color: var(--color-text); }

.about-facts { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.fact-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.fact-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.fact-num {
  display: block;
  font-size: 34px;
  font-weight: 800;
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.fact-label { color: var(--color-text-muted); font-size: 14px; }

/* ---------- 核心团队 ---------- */
.team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.team-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-sm);
}

.team-header {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 24px;
  align-items: center;
  margin-bottom: 28px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--color-border);
}

.team-avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  flex-shrink: 0;
}

.team-meta h3 {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 4px;
}

.team-role {
  font-size: 15px;
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: 8px;
}

.team-tag {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.5;
}

.team-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 28px;
}

.team-metric {
  text-align: center;
  padding: 18px 16px;
  background: linear-gradient(135deg, #f8fbff, #f0f7ff);
  border-radius: var(--radius-md);
}

.team-metric strong {
  display: block;
  font-size: 26px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.team-metric span {
  font-size: 13px;
  color: var(--color-text-muted);
}

.team-body {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.team-body.two-col {
  grid-template-columns: 1fr 1.5fr;
}

.team-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 14px;
}

.team-col ul {
  list-style: none;
}

.team-col ul li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 8px;
}

.team-col ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
}

.team-col p {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.7;
}

.team-foot {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ---------- 学术与科研背书（about 页） ---------- */
.acad-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-sm);
}

.acad-key {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 32px;
}

.acad-key > div {
  background: var(--color-primary-light);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
}

.acad-key .v {
  font-size: 21px;
  font-weight: 800;
  color: var(--color-primary-dark);
  font-variant-numeric: tabular-nums;
  line-height: 1.25;
}

.acad-key .t {
  font-size: 12.5px;
  color: var(--color-text-muted);
  margin-top: 4px;
}

@media (max-width: 1024px) {
  .acad-key { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .acad-key { grid-template-columns: 1fr; }
  .acad-card { padding: 24px 20px; }
}

.team-caption {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-top: 10px;
  line-height: 1.6;
}

/* ---------- 团队（弱化版） ---------- */
.team-compact {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 820px;
  margin: 0 auto;
}
.team-row {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  padding: 22px 24px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}
.team-row .team-avatar {
  width: 56px;
  height: 56px;
  font-size: 24px;
  flex: 0 0 auto;
  margin: 0;
  box-shadow: 0 4px 12px hsla(var(--hue, 220), 60%, 40%, 0.22);
}
.team-row-meta h3 {
  font-size: 19px;
  margin: 0 0 6px;
}
.team-row-meta h3 .team-role {
  font-size: 14px;
  color: var(--color-primary);
  font-weight: 600;
  margin-left: 8px;
}
.team-row-meta p {
  color: var(--color-text-muted);
  font-size: 14.5px;
  line-height: 1.65;
  margin: 0;
}
@media (max-width: 640px) {
  .team-row { flex-direction: column; gap: 12px; padding: 20px 18px; }
}

.credentials {
  margin-top: 72px;
  padding: 40px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}
.credentials h3 {
  font-size: 20px;
  text-align: center;
  margin-bottom: 28px;
  color: var(--color-text);
}
.cred-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.cred-item {
  padding: 18px 20px;
  background: linear-gradient(135deg, #f8fbff, #f0f7ff);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--color-primary);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  transition: transform 0.2s ease;
}
.cred-item:hover { transform: translateX(4px); border-left-color: var(--color-accent); }

/* ---------- 新闻动态 ---------- */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: 26px 24px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-left-color: var(--color-accent); }
.news-date { color: var(--color-text-muted); font-size: 13px; }
.news-card h3 { font-size: 17px; margin: 8px 0 10px; }
.news-card h3 a { color: var(--color-text); }
.news-card h3 a:hover { color: var(--color-primary); }
.news-card p { color: var(--color-text-muted); font-size: 14.5px; margin: 0; }

/* ---- v6.8：真实资讯卡（公众号摘要 + 跳原文）/ 规划选题占位卡 ---- */
.news-grid--2 { grid-template-columns: repeat(2, 1fr); max-width: 940px; margin: 0 auto; }
.news-note { margin: 12px 0 0; font-size: 13.5px; color: var(--color-text-muted); }
.news-card.is-real { border-left-color: var(--color-accent); }
.news-card.is-ph { opacity: 0.7; }
.news-badge {
  display: inline-block;
  margin-left: 8px;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 11.5px;
  font-weight: 600;
  line-height: 1.5;
  color: #b45309;
  background: #fffbeb;
  border: 1px solid #fde68a;
  vertical-align: middle;
}
.news-card p.news-source { margin: 10px 0 0; font-size: 12.5px; opacity: 0.9; }
.news-more {
  display: inline-block;
  margin-top: 14px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
}
.news-more:hover { text-decoration: underline; }
@media (max-width: 640px) {
  .news-grid--2 { grid-template-columns: 1fr; max-width: none; }
}

/* ---------- 联系我们 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: start;
}
.contact-form {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-md);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-group { margin-bottom: 18px; }
.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 14px;
  border: 1.5px solid var(--color-border);
  border-radius: 10px;
  font-size: 15px;
  font-family: inherit;
  color: var(--color-text);
  background: #fafbfe;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  appearance: none;
  -webkit-appearance: none;
}
.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%235b6b85' d='M6 8 0 0h12z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 40px;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
  background: #fff;
}
.form-group textarea { resize: vertical; }
.form-tip { min-height: 24px; margin: 12px 0 0; font-size: 14px; font-weight: 600; }
.form-tip.success { color: #16a34a; }
.form-tip.error { color: #dc2626; }

.contact-info .info-item {
  display: flex;
  gap: 16px;
  padding: 22px 0;
  border-bottom: 1px solid var(--color-border);
}
.contact-info .info-item:last-child { border-bottom: none; }
.info-icon { font-size: 24px; line-height: 1.4; }
.contact-info h3 { font-size: 16px; margin-bottom: 4px; }
.contact-info p { color: var(--color-text-muted); font-size: 15px; margin: 0; }

/* ---------- 法务页面（隐私政策 / 服务条款 / 网站地图）v6.0 ---------- */
.legal-doc { max-width: 860px; margin: 0 auto; }
.legal-doc .legal-meta {
  padding-bottom: 18px;
  margin-bottom: 30px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 14px;
}
.legal-doc h2 {
  margin: 34px 0 12px;
  font-size: 20px;
  font-weight: 800;
  color: var(--color-text);
}
.legal-doc h2:first-of-type { margin-top: 0; }
.legal-doc p { margin: 0 0 14px; color: var(--color-text-muted); font-size: 15.5px; line-height: 1.9; }
.legal-doc ul { margin: 0 0 16px; padding-left: 22px; }
.legal-doc li { margin-bottom: 8px; color: var(--color-text-muted); font-size: 15.5px; line-height: 1.9; }
.legal-doc strong { color: var(--color-text); }
.legal-doc a { font-weight: 600; }
.legal-doc .legal-note {
  margin-top: 32px;
  padding: 18px 22px;
  border-left: 4px solid var(--color-primary);
  border-radius: 12px;
  background: var(--color-bg-alt);
  color: var(--color-text-muted);
  font-size: 14.5px;
  line-height: 1.85;
}
.sitemap-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.sitemap-grid ul { margin: 12px 0 0; padding-left: 20px; }
.sitemap-grid li { margin-bottom: 9px; font-size: 15px; }
@media (max-width: 768px) {
  .sitemap-grid { grid-template-columns: 1fr; }
}

/* ---------- 页脚 ---------- */
.site-footer { background: #0a1a2f; color: #b9c5d8; padding: 64px 0 0; }
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr;
  gap: 40px;
  padding-bottom: 44px;
}
.brand-footer { color: #fff; }
.brand-footer .brand-mark { background: linear-gradient(135deg, var(--color-primary), var(--color-accent)); }
.brand-footer .brand-text small { color: var(--color-accent); }
.footer-brand p { font-size: 14.5px; margin: 16px 0 0; max-width: 280px; }
.footer-col h3 { color: #fff; font-size: 16px; margin-bottom: 18px; }
.footer-col ul li { margin-bottom: 10px; font-size: 14.5px; }
.footer-col a { color: #b9c5d8; }
.footer-col a:hover { color: #fff; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding: 22px 24px;
  font-size: 13.5px;
  color: #7c8ca8;
}
.footer-links a { color: #7c8ca8; }

/* ---------- 滚动渐入动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ==========================================================================
   响应式适配
   ========================================================================== */

/* 平板（≤1024px） */
@media (max-width: 1024px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .solutions-grid { grid-template-columns: repeat(2, 1fr); }
  .cases-grid { grid-template-columns: repeat(2, 1fr); }
  .team-grid { grid-template-columns: 1fr; }
  .news-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .cred-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-inner { gap: 40px; }
}

/* 手机（≤768px） */
@media (max-width: 768px) {
  :root { --header-h: 64px; }
  .section { padding: 64px 0; }
  .section-head { margin-bottom: 40px; }

  /* 导航折叠 */
  .nav-toggle { display: flex; }
  .main-nav {
    position: fixed;
    top: var(--header-h);
    left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: #fff;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    padding: 12px 24px 24px;
    transform: translateY(-130%);
    transition: transform 0.3s ease;
    visibility: hidden;
  }
  .main-nav.open { transform: translateY(0); visibility: visible; }
  .nav-list { flex-direction: column; gap: 4px; }
  .nav-link { display: block; padding: 12px 4px; font-size: 16px; border-bottom: 1px solid var(--color-border); }
  .nav-link::after { display: none; }
  .nav-cta { margin-top: 14px; }

  /* Hero */
  .hero { padding: 0 0 72px; }
  .hero-slide:not(.hero-slide--vision) { padding-top: calc(var(--header-h) + 48px); }
  .hero-inner { grid-template-columns: 1fr; gap: 56px; }
  /* v5.2：手机端收起每屏右侧的纯装饰卡片（aria-hidden，无信息损失），
     四屏统一高度由 ~1277px 降到 ~840px（约等于一个手机屏高） */
  .hero-visual { display: none; }
  .hero-card-main { width: 280px; right: 0; }
  .hero-card-side { width: 180px; }
  .hero-card-mini { width: 140px; }
  .hero-stats { gap: 28px; }
  .stat strong { font-size: 26px; }

  /* 其他区块 */
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .contact-grid { grid-template-columns: 1fr; gap: 36px; }
  .form-row { grid-template-columns: 1fr; }
  .credentials { padding: 28px 20px; margin-top: 48px; }
  .cred-grid { grid-template-columns: 1fr; }
  .team-header { grid-template-columns: 1fr; text-align: center; }
  .team-avatar { margin: 0 auto; }
  .team-metrics { grid-template-columns: repeat(3, 1fr); }
  .team-body { grid-template-columns: 1fr 1fr; }
  .team-body.two-col { grid-template-columns: 1fr; }

  .footer-bottom { justify-content: center; text-align: center; }
}

/* 小屏手机（≤480px） */
@media (max-width: 480px) {
  .container { padding: 0 18px; }
  .services-grid, .solutions-grid, .cases-grid, .team-grid, .news-grid { grid-template-columns: 1fr; }
  .team-card { padding: 28px 20px; }
  .team-metrics { grid-template-columns: 1fr; }
  .team-body { grid-template-columns: 1fr; }

  .about-facts { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .hero-actions .btn { width: 100%; }
  .hero-stats { gap: 20px; }
  .hero-visual { min-height: 340px; }
  .hero-card-main { width: 230px; }
  .hero-card-mini { width: 130px; }
  .contact-form { padding: 26px 20px; }
}

/* ==========================================================================
   方案 B 增强交互（v3：Hero 轮播 / hover 三联动效 / 回到顶部）
   ========================================================================== */

/* ---- Hero 轮播 ---- */
/* v5.3：容器高度由 JS 锁定为「四屏最高」，仅在 resize / 字体加载后重算，
   高度已不再逐屏变化 —— 原来的 height 过渡只会把重算变成可见抖动，故移除。 */
.hero-slider { position: relative; }
.hero-slide {
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 100%;                 /* v5.2：填满统一高度，切屏时背景与内容不错位 */
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.7s ease, visibility 0.7s ease;
}
.hero-slide.is-active { position: relative; opacity: 1; visibility: visible; z-index: 1; }

/* 分层入场动画：激活屏内元素依次浮现 */
.hero-slide.is-active .hero-eyebrow,
.hero-slide.is-active .hero-title,
.hero-slide.is-active .hero-sub,
.hero-slide.is-active .hero-chips,
.hero-slide.is-active .hero-actions,
.hero-slide.is-active .hero-stats,
.hero-slide.is-active .hero-visual {
  animation: heroFadeUp 0.7s ease both;
}
.hero-slide.is-active .hero-title { animation-delay: 0.12s; }
.hero-slide.is-active .hero-sub { animation-delay: 0.24s; }
.hero-slide.is-active .hero-chips { animation-delay: 0.34s; }
.hero-slide.is-active .hero-actions { animation-delay: 0.44s; }
.hero-slide.is-active .hero-stats { animation-delay: 0.54s; }
.hero-slide.is-active .hero-visual { animation-delay: 0.2s; }

@keyframes heroFadeUp {
  from { opacity: 0; transform: translateY(22px); }
  to { opacity: 1; transform: none; }
}

/* 轮播控件：圆点指示器 + 左右箭头 */
.hero-dots {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 5;
}
.hero-dot {
  width: 10px; height: 10px;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: rgba(29, 78, 216, 0.25);
  cursor: pointer;
  transition: background 0.25s ease, transform 0.25s ease;
}
.hero-dot:hover { background: rgba(29, 78, 216, 0.5); }
.hero-dot.is-active { background: var(--color-primary); transform: scale(1.25); }

.hero-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 5;
  width: 44px; height: 44px;
  border-radius: 50%;
  border: 1px solid rgba(29, 78, 216, 0.2);
  background: rgba(255, 255, 255, 0.85);
  color: var(--color-primary);
  font-size: 26px;
  line-height: 1;
  cursor: pointer;
  transition: background 0.25s ease, color 0.25s ease, box-shadow 0.25s ease;
  box-shadow: var(--shadow-sm);
}
.hero-arrow:hover { background: var(--color-primary); color: #fff; }
.hero-arrow-prev { left: 18px; }
.hero-arrow-next { right: 18px; }

/* ---- 第 2/3 屏视觉元素：产品线标签 / 通道网格 / 领域雷达 ---- */
.hero-chips { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 36px; }
.chip {
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--color-primary-light);
  background: rgba(29, 78, 216, 0.06);
  color: var(--color-primary-dark);
  font-size: 14px;
  font-weight: 500;
  transition: background 0.25s ease, transform 0.25s ease;
}
.chip:hover { background: var(--color-primary); color: #fff; transform: translateY(-2px); }

.hc-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 14px;
}
.hc-grid span {
  aspect-ratio: 1;
  border-radius: 6px;
  background: linear-gradient(135deg, rgba(29, 78, 216, 0.28), rgba(6, 182, 212, 0.32));
}
.hc-radar {
  position: relative;
  width: 120px; height: 120px;
  margin-bottom: 14px;
  border-radius: 50%;
  background: conic-gradient(from 0deg,
    rgba(29, 78, 216, 0.08) 0 25%,
    rgba(6, 182, 212, 0.5) 25% 50%,
    rgba(29, 78, 216, 0.4) 50% 75%,
    rgba(236, 72, 153, 0.35) 75% 100%);
}
.hc-radar::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: repeating-conic-gradient(rgba(255, 255, 255, 0.55) 0 3deg, transparent 3deg 12deg);
}
.hc-radar::after {
  content: "";
  position: absolute;
  inset: 26px;
  border-radius: 50%;
  background: #fff;
  box-shadow: inset 0 0 0 1px rgba(29, 78, 216, 0.12);
}

/* ---- hover 三联动效：产品卡（图标缩放 + 遮罩淡入 + 标题上浮）---- */
.service-icon {
  position: relative;
  z-index: 1;
  display: inline-block;
  transition: transform 0.3s ease;
}
.service-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(29, 78, 216, 0.06), rgba(6, 182, 212, 0.1));
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}
.service-card h3 { position: relative; z-index: 1; transition: transform 0.3s ease; }
.service-card:hover::after { opacity: 1; }
.service-card:hover h3 { transform: translateY(-2px); }

/* ---- hover 三联动效：案例卡（封面缩放 + 内容上浮）---- */
.case-card { overflow: hidden; }
.case-cover { transition: transform 0.5s ease; }
.case-card:hover .case-cover { transform: scale(1.06); }
.case-body { position: relative; z-index: 1; transition: transform 0.3s ease; }
.case-card:hover .case-body { transform: translateY(-4px); }

/* ---- 回到顶部按钮 ---- */
.back-top {
  position: fixed;
  right: 28px;
  bottom: 28px;
  z-index: 99;
  width: 46px; height: 46px;
  border: none;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s, background 0.25s ease;
}
.back-top:hover { background: var(--color-primary-dark); }
.back-top.show { opacity: 1; visibility: visible; transform: none; }

/* ---- 轮播移动端适配 ---- */
@media (max-width: 768px) {
  /* v5.2：四屏等高后，垂直居中的箭头会落进文字带 → 手机端下移到与圆点同排
     （箭头 36px 高、bottom:14px → 中心距底 32px；圆点 10px、bottom:27px → 同为 32px） */
  .hero-arrow { width: 36px; height: 36px; font-size: 20px; top: auto; bottom: 14px; transform: none; }
  .hero-arrow-prev { left: 16px; }
  .hero-arrow-next { right: 16px; }
  .hero-dots { bottom: 27px; }
  .back-top { right: 16px; bottom: 16px; width: 42px; height: 42px; }
}

@media (prefers-reduced-motion: reduce) {
  .hero-slide, .hero-slide.is-active { transition: none; animation: none; }
  .hero-slide.is-active .hero-eyebrow,
  .hero-slide.is-active .hero-title,
  .hero-slide.is-active .hero-sub,
  .hero-slide.is-active .hero-chips,
  .hero-slide.is-active .hero-actions,
  .hero-slide.is-active .hero-stats,
  .hero-slide.is-active .hero-visual { animation: none; }
  .case-cover, .case-body, .service-icon, .service-card h3 { transition: none; }
}

/* ========================================
   v4 真实资料版：占位标记体系
   ======================================== */

/* 顶部内容替换阶段提示条 */
/* 占位说明标签（用于资质、新闻等区块） */
.ph-note {
  display: inline-block;
  font-size: 13px;
  color: #b45309;
  background: #fffbeb;
  border: 1px dashed #f59e0b;
  padding: 6px 14px;
  border-radius: 8px;
  margin-top: 12px;
}

/* 已占位资质项：降透明度 */
.cred-item.is-ph { opacity: 0.72; }

/* 无图产品的 CSS 占位视觉（共聚焦 / 探针 / AI 算法） */
.service-image-ph {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: linear-gradient(135deg, #eef2ff 0%, #e0f2fe 55%, #ecfeff 100%);
  border-bottom: 1px solid #e2e8f0;
}
.service-image-ph .ph-icon { font-size: 44px; filter: saturate(0.85); }
.service-image-ph .ph-text {
  font-size: 13px;
  color: #64748b;
  text-align: center;
  line-height: 1.7;
  letter-spacing: 1px;
}

/* ==========================================================================
   独立子页（products.html）：面包屑 / 页面标题区 / 分类筛选 / 参数展开
   ========================================================================== */

/* ---------- 面包屑 ---------- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  color: var(--color-text-muted);
  margin-bottom: 22px;
}
.breadcrumb a { color: var(--color-text-muted); }
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb .sep { color: var(--color-border); }
.breadcrumb .current { color: var(--color-text); font-weight: 600; }

/* ---------- 页面标题区 ---------- */
.page-hero {
  position: relative;
  padding: calc(var(--header-h) + 64px) 0 64px;
  background: linear-gradient(180deg, #f8fbff 0%, #ffffff 100%);
  border-bottom: 1px solid var(--color-border);
}
.page-eyebrow {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1.5px;
  color: var(--color-accent);
  margin-bottom: 12px;
}
.page-title { font-size: 42px; line-height: 1.2; margin-bottom: 16px; }
.page-desc {
  font-size: 17px;
  color: var(--color-text-muted);
  max-width: 720px;
  line-height: 1.75;
}
.page-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  max-width: 860px;
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
}
.pstat strong {
  display: block;
  font-size: 28px;
  font-weight: 800;
  line-height: 1.1;
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
}
.pstat span {
  display: block;
  margin-top: 6px;
  font-size: 13.5px;
  color: var(--color-text-muted);
}

/* ---------- 产品分类筛选 ---------- */
.product-filter {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin: 0 0 44px;
}
.filter-btn {
  font: inherit;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--color-text-muted);
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 8px 22px;
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}
.filter-btn:hover { color: var(--color-primary); border-color: var(--color-primary); }
.filter-btn.active {
  color: #fff;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  border-color: transparent;
  box-shadow: 0 4px 14px rgba(6, 182, 212, 0.28);
}

/* ---------- 参数展开（details） ---------- */
.spec-more { margin: 0 0 16px; }
.spec-more summary {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--color-primary);
  cursor: pointer;
  list-style: none;
  padding: 6px 0;
}
.spec-more summary::-webkit-details-marker { display: none; }
.spec-more summary::before { content: '＋ '; }
.spec-more[open] summary::before { content: '− '; }
.spec-more ul {
  margin: 10px 0 0;
  padding: 14px 16px;
  background: var(--color-bg-alt);
  border-radius: 10px;
}
.spec-more li {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  font-size: 13px;
  padding: 6px 0;
  border-bottom: 1px dashed var(--color-border);
}
.spec-more li:last-child { border-bottom: none; }
.spec-more li span { color: var(--color-text-muted); flex: 0 0 auto; }
.spec-more li b { font-weight: 600; text-align: right; }

/* ---------- 区块内 CTA ---------- */
.section-cta { text-align: center; margin-top: 56px; }
.cta-title { font-size: 26px; margin-bottom: 12px; }
.cta-note { color: var(--color-text-muted); font-size: 15.5px; margin-bottom: 22px; }

@media (max-width: 900px) {
  .page-title { font-size: 32px; }
  .page-stats { grid-template-columns: repeat(2, 1fr); gap: 20px; }
}
@media (max-width: 560px) {
  .page-title { font-size: 26px; }
  .pstat strong { font-size: 22px; }
}

/* ---------- 飞书表单嵌入（联系区） ---------- */
.form-embed { display: flex; flex-direction: column; gap: 12px; }
.feishu-form {
  display: block;
  width: 100%;
  height: 900px;
  border: 0;
  border-radius: 10px;
  background: #fff;
}
.form-fallback {
  margin: 0;
  font-size: 13px;
  color: var(--color-text-muted);
  text-align: center;
}
.form-fallback a { color: var(--color-primary); font-weight: 600; }
@media (max-width: 560px) {
  .feishu-form { height: 1150px; }
}

/* ==========================================================================
   产品详情页（product-*.html）：主信息区 / 优势 / 场景 / 参数表 / 相关产品
   ========================================================================== */

.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;
}

/* ---------- 主信息区 ---------- */
.pd-hero {
  position: relative;
  padding: calc(var(--header-h) + 48px) 0 64px;
  background: linear-gradient(180deg, #f8fbff 0%, #ffffff 100%);
  border-bottom: 1px solid var(--color-border);
}
.pd-hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 48px;
  align-items: start;
}
.pd-media {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  min-height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.pd-media img { width: 100%; height: auto; display: block; }
.pd-info .service-tag { margin-bottom: 14px; }
.pd-title { font-size: 36px; line-height: 1.25; margin-bottom: 14px; }
.pd-lead { font-size: 17px; color: var(--color-text-muted); line-height: 1.75; margin-bottom: 24px; }
.pd-info .service-specs { margin-bottom: 28px; }

.pd-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}
.pd-back {
  font-size: 14.5px;
  color: var(--color-text-muted);
}
.pd-back:hover { color: var(--color-primary); }

/* ---------- 核心优势 ---------- */
.pd-highlights {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}
.pd-hl {
  display: flex;
  gap: 16px;
  padding: 24px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}
.pd-hl:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary-light);
}
.pd-hl-icon {
  flex: 0 0 auto;
  width: 46px; height: 46px;
  display: flex; align-items: center; justify-content: center;
  font-size: 24px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--color-primary-light), #e0f7fa);
}
.pd-hl h3 { font-size: 17px; margin-bottom: 6px; }
.pd-hl p { margin: 0; font-size: 14.5px; color: var(--color-text-muted); line-height: 1.7; }

/* ---------- 应用场景 ---------- */
.pd-apps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.pd-app {
  padding: 28px 26px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  border-top: 3px solid var(--color-accent);
  box-shadow: var(--shadow-sm);
}
.pd-app h3 { font-size: 17px; margin-bottom: 8px; }
.pd-app p { margin: 0; font-size: 14.5px; color: var(--color-text-muted); line-height: 1.75; }

/* ---------- 技术参数表 ---------- */
.pd-spec-wrap {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #fff;
  box-shadow: var(--shadow-sm);
}
.pd-spec { width: 100%; border-collapse: collapse; }
.pd-spec th,
.pd-spec td {
  padding: 15px 22px;
  font-size: 15px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}
.pd-spec tr:last-child th,
.pd-spec tr:last-child td { border-bottom: none; }
.pd-spec th {
  width: 32%;
  font-weight: 600;
  color: var(--color-text-muted);
  background: #fafcff;
}
.pd-spec td { font-weight: 500; }
.pd-spec tr:hover td { background: #fafcff; }
.pd-spec-note {
  margin: 18px 0 0;
  font-size: 13.5px;
  color: var(--color-text-muted);
}
.pd-spec-panel { max-width: 840px; margin: 0 auto; }

/* ---------- 相关产品 ---------- */
.pd-related { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.pd-rel {
  display: block;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}
.pd-rel:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary-light);
  text-decoration: none;
}
.pd-rel-media {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 150px;
  background: var(--color-bg-alt);
  overflow: hidden;
}
.pd-rel-media img { width: 100%; height: 100%; object-fit: cover; }
.pd-rel-emoji { font-size: 40px; }
.pd-rel-body {
  display: block;
  padding: 18px 20px 20px;
}
.pd-rel-body strong {
  display: block;
  font-size: 15.5px;
  color: var(--color-text);
  line-height: 1.5;
  margin-bottom: 6px;
}
.pd-rel-body em {
  font-style: normal;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .pd-hero-grid { grid-template-columns: 1fr; gap: 32px; }
  .pd-highlights { grid-template-columns: 1fr; }
  .pd-apps, .pd-related { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .pd-title { font-size: 28px; }
  .pd-lead { font-size: 16px; }
  .pd-apps, .pd-related { grid-template-columns: 1fr; }
  .pd-spec th { width: 40%; }
  .pd-spec th, .pd-spec td { padding: 13px 16px; font-size: 14.5px; }
  .pd-actions .btn { flex: 1 1 auto; text-align: center; }
}

/* ==========================================================================
   首页产品下拉选择器 + 展示面板（v4.4）
   ========================================================================== */
.product-picker {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px 16px;
  margin: 0 0 26px;
}
.picker-label {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-text-muted);
  letter-spacing: 0.5px;
}
.picker-wrap { position: relative; min-width: 360px; max-width: 100%; flex: 0 1 auto; }
.picker-wrap select {
  appearance: none;
  -webkit-appearance: none;
  width: 100%;
  padding: 15px 48px 15px 18px;
  font-family: inherit;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.picker-wrap select:hover { border-color: var(--color-primary-light); }
.picker-wrap select:focus-visible {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.18);
}
.picker-arrow {
  position: absolute;
  right: 20px;
  top: 50%;
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--color-text-muted);
  border-bottom: 2px solid var(--color-text-muted);
  transform: translateY(-70%) rotate(45deg);
  pointer-events: none;
}
.picker-hint {
  width: 100%;
  text-align: center;
  font-size: 13px;
  color: var(--color-text-muted);
  margin: 0;
}

.showcase-panel {
  display: grid;
  grid-template-columns: 460px 1fr;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  animation: showcaseIn 0.35s ease both;
}
@keyframes showcaseIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: none; }
}
.showcase-media {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #eef2f7;
  min-height: 340px;
  overflow: hidden;
}
.showcase-media img { width: 100%; height: 100%; object-fit: cover; display: block; }
.showcase-media.is-contain img { object-fit: contain; background: #fff; }
.showcase-body { padding: 36px 40px; display: flex; flex-direction: column; }
.showcase-body h3 { font-size: 24px; line-height: 1.35; margin-bottom: 10px; }
.showcase-body .service-lead { font-size: 15.5px; line-height: 1.75; }
.showcase-body .service-specs { margin-bottom: 22px; }
.showcase-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 2px; }
.showcase-actions .btn { padding: 12px 26px; }

@media (max-width: 900px) {
  .showcase-panel { grid-template-columns: 1fr; }
  .showcase-media { min-height: 0; aspect-ratio: 3 / 2; }
  .showcase-body { padding: 26px 24px; }
  .showcase-body h3 { font-size: 21px; }
}
@media (max-width: 560px) {
  .picker-wrap { min-width: 0; width: 100%; }
  .showcase-actions .btn { flex: 1 1 auto; text-align: center; }
}

/* ==========================================================================
   产品列表页：单个产品一行（左图右文）
   ========================================================================== */
.product-list { grid-template-columns: 1fr; gap: 20px; }
.product-row {
  display: grid;
  grid-template-columns: 380px 1fr;
  align-items: stretch;
  padding: 0;
  gap: 0;
}
.product-row:hover { transform: translateY(-3px); }
.product-row .service-image {
  margin: 0;
  width: 100%;
  aspect-ratio: auto;
  height: 100%;
  min-height: 300px;
  border-bottom: none;
}
.product-row .service-image img { height: 100%; }
.product-row .service-body {
  padding: 30px 34px;
  display: flex;
  flex-direction: column;
}
.product-row h3 { font-size: 21px; }
.product-row .service-specs { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.product-row .case-link { margin-top: auto; align-self: flex-start; padding-top: 6px; }

@media (max-width: 860px) {
  .product-row { grid-template-columns: 1fr; }
  .product-row .service-image { min-height: 0; aspect-ratio: 3 / 2; border-bottom: 1px solid #e2e8f0; }
  .product-row .service-body { padding: 24px 22px; }
}

/* ==========================================================================
   产品列表页：主分类 tab 下拉子分类（v4.4）
   ========================================================================== */

/* 主 tab 加 ⌄ 提示 */
.filter-btn { position: relative; }
.filter-btn.has-caret { padding-right: 38px; }
.filter-btn .caret {
  display: inline-block;
  margin-left: 6px;
  font-size: 12px;
  line-height: 1;
  color: var(--color-text-muted);
  transition: transform 0.25s ease, color 0.25s ease;
}
.filter-btn.active .caret { color: var(--color-primary); transform: rotate(180deg); }

/* 主 tab 激活态底部下划线（更接近截图视觉） */
.filter-btn::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -1px;
  transform: translateX(-50%) scaleX(0);
  transform-origin: center;
  width: 32px;
  height: 3px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transition: transform 0.25s ease;
}
.filter-btn.active::after { transform: translateX(-50%) scaleX(1); }

/* 子分类容器 */
.product-subfilter {
  background: #f5f7fb;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 14px 20px;
  margin: 0 0 28px;
}
.sub-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}
.sub-row[hidden] { display: none; }
.sub-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-text-muted);
  margin-right: 8px;
  letter-spacing: 0.4px;
}
.sub-btn {
  font-family: inherit;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--color-text);
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 7px 16px;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}
.sub-btn:hover { color: var(--color-primary); border-color: var(--color-primary-light); }
.sub-btn.active {
  color: #fff;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  border-color: var(--color-primary);
}

/* ==========================================================================
   主导航二级下拉菜单（v4.4）
   ========================================================================== */
.nav-item.has-dropdown { position: relative; }
.nav-caret {
  display: inline-block;
  margin-left: 5px;
  font-size: 11px;
  line-height: 1;
  transition: transform 0.25s ease;
}
.nav-item.has-dropdown:hover .nav-caret,
.nav-item.has-dropdown:focus-within .nav-caret,
.nav-item.has-dropdown.is-open .nav-caret { transform: rotate(180deg); }

.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  min-width: 260px;
  padding: 8px;
  margin: 0;
  list-style: none;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: 0 12px 32px rgba(15, 29, 51, 0.14);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.22s ease, transform 0.22s ease, visibility 0.22s;
  z-index: 60;
}
.nav-item.has-dropdown:hover .nav-dropdown,
.nav-item.has-dropdown:focus-within .nav-dropdown,
.nav-item.has-dropdown.is-open .nav-dropdown {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}
.nav-dropdown::before {           /* 顶部小三角 */
  content: "";
  position: absolute;
  top: -6px;
  left: 50%;
  transform: translateX(-50%) rotate(45deg);
  width: 11px;
  height: 11px;
  background: #fff;
  border-left: 1px solid var(--color-border);
  border-top: 1px solid var(--color-border);
}
.nav-dropdown li + li { margin-top: 2px; }
.nav-dropdown a {
  display: block;
  padding: 10px 14px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  white-space: nowrap;
  transition: background 0.18s ease, color 0.18s ease;
}
.nav-dropdown a:hover,
.nav-dropdown a:focus {
  background: rgba(6, 182, 212, 0.10);
  color: var(--color-primary);
  text-decoration: none;
}

/* 移动端：下拉改为静态展开（无 hover），缩进显示 */
@media (max-width: 900px) {
  .nav-dropdown {
    position: static;
    transform: none;
    min-width: 0;
    box-shadow: none;
    border: none;
    background: transparent;
    padding: 0 0 0 12px;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    display: none;
  }
  .nav-dropdown::before { display: none; }
  .nav-item.has-dropdown.is-open .nav-dropdown { display: block; }
  .nav-dropdown a { padding: 8px 10px; font-size: 14px; }
}

/* ==========================================================================
   独立页新增组件（v4.5）：解决方案详情 / CTA 带
   ========================================================================== */
.sol-detail {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 40px;
  align-items: start;
}
.sol-detail-main h2 { font-size: 27px; margin: 8px 0 12px; }
.sol-detail-main .service-lead { font-size: 16px; line-height: 1.8; margin-bottom: 22px; }
.sol-block { margin-bottom: 20px; }
.sol-block h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 10px;
  padding-left: 11px;
  border-left: 3px solid var(--color-primary);
}
.sol-list { list-style: none; padding: 0; margin: 0; }
.sol-list li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 8px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--color-text-muted);
}
.sol-list li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 11px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--color-accent);
}
.sol-detail-main .sol-tags { margin-top: 6px; }

.sol-detail-side {
  background: var(--color-bg-alt, #f5f7fb);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px 22px;
}
.sol-detail-side h3 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 14px;
  color: var(--color-text);
}
.sol-machine {
  display: block;
  padding: 13px 15px;
  margin-bottom: 9px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}
.sol-machine:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
  transform: translateX(3px);
  text-decoration: none;
}
.sol-machine strong { display: block; font-size: 14.5px; color: var(--color-text); margin-bottom: 3px; }
.sol-machine span { font-size: 12.5px; color: var(--color-text-muted); }

@media (max-width: 900px) {
  .sol-detail { grid-template-columns: 1fr; gap: 26px; }
  .sol-detail-main h2 { font-size: 23px; }
}

/* CTA 带 */
.section-cta-band { background: linear-gradient(120deg, #0f1d33, #14304d); }
.section-cta-band h2 { color: #fff; font-size: 26px; margin: 0 0 8px; }
.section-cta-band p { color: rgba(255, 255, 255, 0.78); font-size: 15.5px; margin: 0; }
.cta-band-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 22px;
}
.cta-band-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.section-cta-band .btn-ghost { color: #fff; border-color: rgba(255, 255, 255, 0.4); }
.section-cta-band .btn-ghost:hover { border-color: #fff; color: #fff; }

@media (max-width: 700px) {
  .section-cta-band h2 { font-size: 21px; }
  .cta-band-actions { width: 100%; }
  .cta-band-actions .btn { flex: 1 1 auto; text-align: center; }
}

/* ==========================================================================
   产品详情页 · 实拍成像效果（pd-gallery）
   ========================================================================== */
.pd-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 22px;
}
.pd-shot {
  margin: 0;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.pd-shot:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.pd-shot-media {
  aspect-ratio: 4 / 3;
  background: #0b1220;             /* 深底衬托荧光图像 */
  display: flex;
  align-items: center;
  justify-content: center;
}
.pd-shot-media img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}
.pd-shot figcaption {
  padding: 14px 18px 16px;
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.7;
}
.pd-shot figcaption strong {
  display: block;
  color: var(--color-text);
  font-size: 15px;
  margin-bottom: 4px;
}
/* 应用场景标签行（双通道） */
.pd-app-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}
.pd-app-tags span {
  padding: 7px 16px;
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  border-radius: 999px;
  font-size: 13.5px;
  font-weight: 500;
}
/* 深度优势说明条（共聚焦） */
.pd-note {
  margin-top: 20px;
  padding: 15px 20px;
  background: #fff7ed;
  border-left: 4px solid var(--color-accent-warm);
  border-radius: var(--radius-sm);
  font-size: 14.5px;
  color: var(--color-text);
  line-height: 1.75;
}
/* 文献引用 */
.pd-refs {
  margin-top: 16px;
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.9;
}
.pd-refs em { font-style: italic; }
.pd-refs .ref-tag {
  display: inline-block;
  margin-left: 6px;
  padding: 1px 8px;
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  border-radius: 999px;
  font-size: 11.5px;
  white-space: nowrap;
}

/* ==========================================================================
   应用案例卡片 · 真实实拍封面（替换原 CSS 渐变 + 🔬 占位）
   ========================================================================== */
.case-cover--img {
  position: relative;
  height: 190px;
  background: #0b1220;              /* 深底衬托荧光成像图 */
}
.case-cover--img::before,
.case-cover--img::after { display: none; }   /* 去掉渐变光晕与 🔬 图标 */
.case-cover--img img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;                /* 封面满铺，视觉更有冲击力 */
  display: block;
  transition: transform 0.45s ease;
}
.case-card:hover .case-cover--img img { transform: scale(1.06); }
.case-shot-badge {
  position: absolute;
  right: 10px;
  bottom: 10px;
  z-index: 2;
  padding: 3px 11px;
  background: rgba(9, 15, 28, 0.72);
  color: #fff;
  font-size: 11.5px;
  border-radius: 999px;
  letter-spacing: 0.02em;
}
@media (max-width: 768px) {
  .case-cover--img { height: 170px; }
}

/* ==========================================================================
   应用案例详情页（case detail · cd-*）
   ========================================================================== */
.cd-wrap {
  display: grid;
  grid-template-columns: 1.65fr 1fr;
  gap: 34px;
  align-items: start;
}
.cd-body p {
  font-size: 16px;
  color: var(--color-text-muted);
  line-height: 1.9;
  margin-bottom: 16px;
}
.cd-body p:last-child { margin-bottom: 0; }

/* 侧栏信息卡 */
.cd-meta {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 22px 24px;
}
.cd-meta h3 {
  font-size: 15px;
  margin: 0 0 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
}
.cd-meta dl { margin: 0; }
.cd-meta dl > div {
  display: flex;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--color-border);
  font-size: 14.5px;
}
.cd-meta dl > div:last-child { border-bottom: none; padding-bottom: 0; }
.cd-meta dt {
  flex: 0 0 84px;
  color: var(--color-text-muted);
  margin: 0;
}
.cd-meta dd { margin: 0; color: var(--color-text); font-weight: 500; }

/* 关键指标条 */
.cd-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.cd-metric {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 22px 18px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}
.cd-metric strong {
  display: block;
  font-size: 26px;
  line-height: 1.25;
  color: var(--color-primary);
  margin-bottom: 6px;
}
.cd-metric span { font-size: 13.5px; color: var(--color-text-muted); }

/* 研究路径：挑战 / 方案 / 结果 */
.cd-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  counter-reset: cdstep;
}
.cd-step {
  background: #fff;
  border: 1px solid var(--color-border);
  border-top: 3px solid var(--color-accent);
  border-radius: var(--radius-md);
  padding: 24px 24px 26px;
  box-shadow: var(--shadow-sm);
}
.cd-step h3 {
  font-size: 16.5px;
  margin: 0 0 12px;
  color: var(--color-text);
}
.cd-step p {
  font-size: 14.5px;
  color: var(--color-text-muted);
  line-height: 1.85;
  margin: 0;
}

/* 结论引言 */
.cd-quote {
  margin: 0;
  padding: 22px 28px;
  background: var(--color-primary-light);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-sm);
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--color-primary-dark);
}

/* 适用机型卡 */
.cd-machine {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 26px;
  align-items: center;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.cd-machine-media { background: #0b1220; aspect-ratio: 4 / 3; }
.cd-machine-media img {
  width: 100%; height: 100%;
  object-fit: contain; display: block;
}
.cd-machine-info { padding: 26px 30px 26px 0; }
.cd-machine-info h3 { font-size: 19px; margin: 0 0 10px; }
.cd-machine-info p {
  font-size: 15px; color: var(--color-text-muted);
  line-height: 1.8; margin: 0 0 18px;
}

@media (max-width: 1024px) {
  .cd-wrap { grid-template-columns: 1fr; }
  .cd-metrics { grid-template-columns: repeat(2, 1fr); }
  .cd-steps { grid-template-columns: 1fr; }
  .cd-machine { grid-template-columns: 1fr; }
  .cd-machine-info { padding: 0 24px 24px; }
}
@media (max-width: 480px) {
  .cd-metrics { grid-template-columns: 1fr; }
}

/* ==========================================================================
   应用案例总览页 · 一整行一个大案例（case-row）
   ========================================================================== */
.cases-list {
  display: grid;
  gap: 32px;
}
.case-row {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}
.case-row:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
/* 偶数行左右互换 */
.case-row:nth-child(even) .case-row-media { order: 2; }

.case-row-media {
  position: relative;
  display: block;
  background: #0b1220;
  min-height: 320px;
  overflow: hidden;
}
.case-row-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s ease;
}
.case-row:hover .case-row-media img { transform: scale(1.05); }
.case-row-num {
  position: absolute;
  left: 20px;
  top: 12px;
  z-index: 2;
  font-size: 40px;
  font-weight: 800;
  line-height: 1;
  color: rgba(255, 255, 255, 0.3);
  letter-spacing: -0.02em;
}

.case-row-body {
  padding: 40px 44px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.case-row-body h3 {
  font-size: 24px;
  line-height: 1.4;
  margin: 12px 0 14px;
  color: var(--color-text);
}
.case-row-body > p {
  font-size: 15.5px;
  color: var(--color-text-muted);
  line-height: 1.9;
  margin: 0;
}
.case-row-stats {
  list-style: none;
  padding: 0;
  margin: 22px 0 26px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px 30px;
}
.case-row-stats li { min-width: 96px; }
.case-row-stats strong {
  display: block;
  font-size: 22px;
  line-height: 1.3;
  color: var(--color-primary);
}
.case-row-stats span { font-size: 13px; color: var(--color-text-muted); }
.case-row-body .btn { align-self: flex-start; }

@media (max-width: 1024px) {
  .case-row { grid-template-columns: 1fr; }
  .case-row .case-row-media,
  .case-row:nth-child(even) .case-row-media { order: 0; }
  .case-row-media { min-height: 0; aspect-ratio: 16 / 10; }
  .case-row-body { padding: 28px 26px 32px; }
}
@media (max-width: 480px) {
  .case-row-body h3 { font-size: 20px; }
  .case-row-stats { gap: 14px 22px; }
}

/* ==========================================================================
   首页 Hero 第 1 屏 · 品牌愿景海报（浅色系，2026-09-09 选 L2 荧光网络）
   ========================================================================== */
.hero-slide--vision {
  min-height: 640px;
  display: flex;
  align-items: center;
  /* v5.1：全出血海报 —— 无圆角 / 无外阴影 / 无外边距，背景自页面顶端铺满，
     并用 padding-top 让文案整体落在固定导航下方 */
  padding-top: calc(var(--header-h) + 24px);
  background: #f5f8fc url('../images/hero-poster-bg.jpg') center / cover no-repeat;
  overflow: hidden;
}
.hero-slide--vision .hero-inner { width: 100%; }
.hero-content--center {
  max-width: 860px;
  margin: 0 auto;
  text-align: center;
  padding: 72px 24px;
}
.vp-eyebrow {
  font-size: 15px;
  letter-spacing: 0.55em;
  text-indent: 0.55em;          /* 视觉居中补偿 */
  color: #a87a14;
  margin: 0 0 18px;
  font-weight: 500;
}
.vp-rule {
  width: 64px;
  height: 3px;
  background: #d3a33c;
  border: none;
  margin: 0 auto 26px;
}
.vp-title {
  font-size: 52px;
  line-height: 1.28;
  color: #0e2a52;
  letter-spacing: 0.04em;
  text-shadow: 0 2px 18px rgba(255, 255, 255, 0.6);
  margin: 0 0 22px;
}
.vp-sub {
  font-size: 18px;
  line-height: 1.9;
  color: #3c4f6b;
  margin: 0 0 14px;
}
.vp-spec {
  font-size: 13.5px;
  letter-spacing: 0.32em;
  text-indent: 0.32em;
  color: #0e8fa8;
  margin: 0 0 34px;
}
/* 浅色屏上的按钮适配 */
.hero-slide--vision .btn-ghost {
  color: #0e2a52;
  border-color: rgba(14, 42, 82, 0.45);
}
.hero-slide--vision .btn-ghost:hover {
  border-color: #0e2a52;
  background: rgba(14, 42, 82, 0.06);
}
@media (max-width: 768px) {
  .hero-slide--vision { min-height: 520px; padding-top: calc(var(--header-h) + 16px); }
  .vp-title { font-size: 34px; }
  .vp-sub { font-size: 15.5px; }
  .vp-eyebrow { font-size: 13px; }
}

/* ==========================================================================
   品牌化留资卡片（v4.6）：替代飞书 iframe，样式完全由官网控制
   ========================================================================== */
.lead-card { display: flex; flex-direction: column; }
.lead-head { display: flex; gap: 16px; align-items: flex-start; margin-bottom: 24px; }
.lead-icon {
  flex: 0 0 52px;
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 23px;
  line-height: 1;
}
.lead-head-text h3 { font-size: 19px; margin-bottom: 6px; line-height: 1.4; }
.lead-head-text p { color: var(--color-text-muted); font-size: 14.5px; line-height: 1.75; margin: 0; }
.lead-points { list-style: none; padding: 0; margin: 0 0 26px; }
.lead-points li {
  position: relative;
  padding-left: 28px;
  margin-bottom: 11px;
  font-size: 14.5px;
  color: var(--color-text);
  line-height: 1.6;
}
.lead-points li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 1px;
  width: 19px;
  height: 19px;
  border-radius: 50%;
  background: rgba(6, 182, 212, 0.16);
  color: var(--color-primary);
  font-size: 11px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}
.lead-btn { width: 100%; text-align: center; }
.lead-note { margin: 14px 0 0; font-size: 12.5px; color: var(--color-text-muted); text-align: center; }
.lead-note a { color: var(--color-primary); font-weight: 600; }

/* 站内联系表单 */
.lead-form { margin-top: 18px; display: flex; flex-direction: column; gap: 13px; }
.form-row { display: flex; flex-direction: column; gap: 6px; }
.form-row label { font-size: 13px; font-weight: 600; color: var(--color-text, #1f2937); }
.form-row .req { color: #e5484d; }
.form-row input,
.form-row select,
.form-row textarea {
  width: 100%;
  padding: 11px 13px;
  font-size: 14px;
  font-family: inherit;
  color: var(--color-text, #1f2937);
  background: var(--color-bg, #fff);
  border: 1px solid var(--color-border, #d8dee6);
  border-radius: 10px;
  transition: border-color .15s, box-shadow .15s;
  box-sizing: border-box;
}
.form-row textarea { resize: vertical; min-height: 92px; }
.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--color-primary, #1d4ed8);
  box-shadow: 0 0 0 3px rgba(29,78,216,.12);
}
.hp-field { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form-msg { margin: 2px 0 0; font-size: 13px; min-height: 18px; }
.form-msg.ok { color: #1a9c5b; font-weight: 600; }
.form-msg.err { color: #e5484d; }

@media (max-width: 560px) {
  .lead-card { padding: 26px 22px; }
  .lead-head { gap: 12px; }
  .lead-icon { flex: 0 0 44px; width: 44px; height: 44px; font-size: 20px; }
  .lead-head-text h3 { font-size: 17.5px; }
}

/* ==========================================================================
   产品页重构（v4.7）：紧凑产品卡（2 列）+ 四大产品线选型对比表
   参考 yzqjmyq.com/products 的信息密度做法，但保留胜拓自有设计系统
   ========================================================================== */

/* ---------- 1. 产品矩阵：产品线跳转 + 横排大卡（v5.0，参考 V4 材料排版） ---------- */
.pl-nav { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin: 4px 0 20px; }
.pl-nav a {
  text-decoration: none;
  font-size: 12.8px;
  color: var(--color-primary-dark);
  background: var(--color-primary-light);
  border: 1px solid #c7dcfb;
  border-radius: 999px;
  padding: 6px 16px;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}
.pl-nav a:hover,
.pl-nav a:focus-visible { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }
.pl-nav .cnt { color: var(--color-text-muted); font-size: 12.5px; padding-left: 4px; }

.pl-item {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 24px;
  padding: 22px 0;
  scroll-margin-top: calc(var(--header-h) + 16px);
}
.pl-nav + .pl-item { padding-top: 4px; }
.pl-item + .pl-item { border-top: 1px dashed var(--color-border); }

.pl-thumb {
  position: relative;
  height: 200px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: #eef2f7;
}
.pl-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform 0.5s ease; }
.pl-thumb.is-contain img { object-fit: contain; background: #fff; }
.pl-item:hover .pl-thumb img { transform: scale(1.04); }
.pl-thumb.ph {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 0 22px;
  text-align: center;
  background: linear-gradient(135deg, #eef2ff 0%, #e0f2fe 55%, #ecfeff 100%);
}
.pl-thumb.ph .ph-icon { font-size: 40px; filter: saturate(0.85); }
.pl-thumb.ph .ph-text { font-size: 12.5px; color: #64748b; line-height: 1.7; letter-spacing: 1px; }

.pl-body h3 { font-size: 18px; margin: 0 0 10px; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; line-height: 1.45; }
.pl-badge {
  font-size: 11.5px;
  font-weight: 700;
  color: #fff;
  background: var(--color-primary);
  border-radius: 999px;
  padding: 2px 11px;
  letter-spacing: 0.5px;
}
.pl-badge.b2 { background: var(--color-accent); }
.pl-badge.b3 { background: #7c3aed; }
.pl-badge.b4 { background: var(--color-accent-warm); }

.pl-desc { font-size: 13.5px; color: var(--color-text-muted); line-height: 1.7; margin: 0 0 12px; }
.pl-pills { display: flex; gap: 8px; flex-wrap: wrap; margin: 0 0 14px; }
.pl-pill {
  font-size: 12px;
  color: var(--color-primary-dark);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 3px 12px;
}

.pl-key { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; margin: 0 0 14px; }
.pl-key > div { background: var(--color-primary-light); border-radius: var(--radius-sm); padding: 10px 13px; }
.pl-key .v {
  font-size: 14.5px;
  font-weight: 800;
  color: var(--color-primary-dark);
  font-variant-numeric: tabular-nums;
  line-height: 1.3;
}
.pl-key .t { font-size: 11.5px; color: var(--color-text-muted); margin-top: 2px; }

.pl-actions { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.pl-actions .pl-more { flex: 1 1 240px; }
.pl-more { font-size: 12.8px; }
.pl-more summary { cursor: pointer; color: var(--color-primary); font-weight: 600; list-style: none; display: inline-block; }
.pl-more summary::-webkit-details-marker { display: none; }
.pl-more summary::before { content: "＋ "; }
.pl-more[open] summary::before { content: "－ "; }
.pl-more table { width: 100%; border-collapse: collapse; margin-top: 10px; }
.pl-more th {
  background: var(--color-bg-alt);
  color: var(--color-text);
  font-weight: 600;
  text-align: left;
  padding: 6px 11px;
  border: 1px solid var(--color-border);
  width: 132px;
  white-space: nowrap;
}
.pl-more td { padding: 6px 11px; border: 1px solid var(--color-border); color: var(--color-text-muted); }

/* ---------- 2. 四大产品线选型对比表 ---------- */
.cmp-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}
.cmp-table { width: 100%; min-width: 820px; border-collapse: collapse; font-size: 14px; }
.cmp-table th, .cmp-table td {
  padding: 13px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--color-border);
  line-height: 1.65;
}
.cmp-table thead th {
  background: var(--color-bg-alt);
  font-size: 15px;
  font-weight: 700;
  color: var(--color-text);
  white-space: nowrap;
  border-bottom: 2px solid var(--color-primary-light);
}
.cmp-table tbody th {
  width: 152px;
  font-weight: 600;
  color: var(--color-text);
  background: #fafcff;
  white-space: nowrap;
}
.cmp-table tbody tr:last-child th,
.cmp-table tbody tr:last-child td { border-bottom: none; }
.cmp-table tbody tr:hover td, .cmp-table tbody tr:hover th { background: #f6faff; }

.cmp-table tbody tr.cmp-group th {
  width: auto;
  white-space: normal;
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 9px 16px;
}
.cmp-table tbody tr.cmp-group:hover th { background: var(--color-primary-light); }
.cmp-dash { color: var(--color-text-muted); }
.cmp-note { margin: 16px 0 0; font-size: 12.5px; color: var(--color-text-muted); text-align: center; line-height: 1.7; }
.cmp-note a { color: var(--color-primary); font-weight: 600; }

/* ---------- 应用方向（v4.8） ---------- */
.appdir-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.appdir-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 22px 22px 24px;
}
.appdir-card h3 {
  font-size: 16px;
  font-weight: 700;
  margin: 0 0 14px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--color-border);
}
.appdir-card .sol-tags { gap: 8px; }

/* ---------- 3. 响应式 ---------- */
@media (max-width: 900px) {
  .pl-item { grid-template-columns: 1fr; gap: 16px; }
  .pl-thumb { height: 200px; }
}
@media (max-width: 560px) {
  .pl-body h3 { font-size: 16.5px; }
  .pl-key { grid-template-columns: 1fr; }
  .pl-more th { width: 106px; }
  .cmp-table { font-size: 13px; }
  .cmp-table th, .cmp-table td { padding: 11px 13px; }
  .cmp-table tbody th { width: 110px; }
}
@media (max-width: 900px) {
  .appdir-grid { grid-template-columns: 1fr; gap: 16px; }
}

/* ==========================================================================
   首页 Hero · 四屏高度统一（v5.2，2026-09-14）
   —— 容器高度由 JS 锁定为「本断点最高屏」，四屏等高：
      ① 切屏时相对 .hero 居中的左右箭头不再上下跳动；
      ② 最矮的首屏不再出现「箭头压字」（实测 430px 时左右净空仅 0–4px）；
      ③ 底部留白一致，四屏观感统一。
      手机端（≤768px）配合两处：收起纯装饰卡片 + 箭头下移到圆点同排。
   ========================================================================== */
/* 测高开关（v5.3 关键修复）：统一高度必须在「各屏自身内容高度」上取最大值。
   但四屏已声明 height:100%，会解析到 .hero-slider 的高度，而 .hero-slider 的
   auto 高度又由当前激活屏撑开 —— 四条屏会全部等于激活屏高度，取最大值必然取错
   （实测：锁成最矮的第 1 屏 737，而第 3/4 屏真实需要 881，内容溢出被裁）。
   故测高期间临时取消 height:100%，让各屏回落到自身内容高度。 */
.hero-slider.is-measuring .hero-slide { height: auto; }

/* 中小屏（769–1232px）安全带补丁：--container 为 1140px，当视口不足以让
   1140px 容器居中留出足够空白时，内容左边缘会退到 x=24，落进箭头占位区。
   注意 padding 是**替换**容器原有 24px（不是叠加），故这里必须给足：
   箭头收窄至 38px、内缩 8px（占位 x[8,46]）+ 内容 padding 60px → 实测净空 14px。 */
@media (min-width: 769px) and (max-width: 1232px) {
  .hero-arrow { width: 38px; height: 38px; font-size: 22px; }
  .hero-arrow-prev { left: 8px; }
  .hero-arrow-next { right: 8px; }
  .hero-inner { padding-left: 60px; padding-right: 60px; }
}

/* 窄桌面（769–900px）：栏位被安全带压缩后，320px 装饰主卡会挤出右栏压到正文，
   这里与手机端取同尺寸（280px），使其仍能落在栏间空隙内。 */
@media (min-width: 769px) and (max-width: 900px) {
  .hero-card-main { width: 280px; }
}