/* ==========================================================
   企业网站样式 - 深色科技工业风（2026 版）
   设计参考：施耐德电气工业专题站 / 派迪科技等工业官网标杆
   ========================================================== */
:root {
  --bg: #0a1628;
  --bg-2: #0d1c33;
  --card: rgba(148, 184, 255, 0.045);
  --card-solid: #101f38;
  --border: rgba(148, 184, 255, 0.14);
  --border-strong: rgba(56, 189, 248, 0.38);
  --blue: #2e7cf6;
  --cyan: #38bdf8;
  --accent: #f5a623;
  --text: #e8f0fa;
  --body: #b4c6dd;
  --muted: #8fa8c6;
  --dim: #5f7a9c;
  --radius: 14px;
  --grad-blue: linear-gradient(135deg, #2e7cf6, #38bdf8);
  --grad-accent: linear-gradient(135deg, #f5a623, #f7c25e);
  --grid-line: rgba(56, 189, 248, 0.05);
  --shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
  color: var(--body);
  background:
    radial-gradient(1100px 500px at 82% -10%, rgba(46, 124, 246, 0.13), transparent 60%),
    radial-gradient(900px 420px at 0% 110%, rgba(245, 166, 35, 0.05), transparent 55%),
    var(--bg);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

::selection { background: rgba(56, 189, 248, 0.3); color: #fff; }

a { color: inherit; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ==========================================================
   顶部导航
   ========================================================== */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(10, 22, 40, 0.72);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(148, 184, 255, 0.08);
  transition: background .25s, box-shadow .25s;
}
.site-header.scrolled {
  background: rgba(8, 18, 33, 0.94);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 20px; }

.logo { display: flex; align-items: center; gap: 10px; text-decoration: none; flex-shrink: 0; }
.logo-mark {
  display: inline-flex; align-items: center; justify-content: center;
  /* 官方标自带米白底 #fdfcef：用同色底板承托，深色顶栏上不留生硬边距也不改写品牌色 */
  background: #fdfcef;
  border: 1px solid rgba(56, 189, 248, 0.28);
  border-radius: 9px;
  padding: 4px 8px;
  box-shadow: 0 0 18px rgba(46, 124, 246, 0.28);
}
/* 顶栏/页脚共用同一张官方组合图（YX 折面 + 昱行书法字），按高等比缩放 */
.logo-img { display: block; width: auto; height: 30px; }
.logo-text { color: var(--text); font-size: 16px; font-weight: 600; white-space: nowrap; }

.site-nav { display: flex; gap: 22px; }
.site-nav a {
  color: var(--muted); text-decoration: none; font-size: 14.5px;
  transition: color .2s; position: relative; padding: 4px 0;
}
.site-nav a::after {
  content: ""; position: absolute; left: 0; right: 100%; bottom: -2px; height: 2px;
  background: var(--grad-blue); border-radius: 2px; transition: right .25s;
}
.site-nav a:hover, .site-nav a.active { color: var(--text); }
.site-nav a:hover::after, .site-nav a.active::after { right: 0; }

.header-actions { display: flex; align-items: center; gap: 14px; flex-shrink: 0; }
.nav-cta {
  display: inline-block; padding: 8px 20px; border-radius: 999px;
  background: var(--grad-accent); color: #1f2b38; font-size: 14px; font-weight: 700;
  text-decoration: none; transition: transform .2s, box-shadow .2s;
  box-shadow: 0 4px 14px rgba(245, 166, 35, 0.3);
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(245, 166, 35, 0.45); }
.nav-toggle {
  display: none; background: none; border: 1px solid var(--border); border-radius: 8px;
  color: var(--text); width: 44px; height: 44px; cursor: pointer; font-size: 18px;
  align-items: center; justify-content: center;
}

/* ==========================================================
   按钮
   ========================================================== */
.btn {
  display: inline-block; padding: 12px 32px; border-radius: 10px;
  font-size: 15.5px; font-weight: 600; text-decoration: none;
  transition: all .2s; border: 1px solid transparent; cursor: pointer;
}
.btn-primary { background: var(--grad-blue); color: #fff; box-shadow: 0 6px 20px rgba(46, 124, 246, 0.35); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 28px rgba(46, 124, 246, 0.5); }
.btn-accent { background: var(--grad-accent); color: #1f2b38; box-shadow: 0 6px 20px rgba(245, 166, 35, 0.35); }
.btn-accent:hover { transform: translateY(-2px); box-shadow: 0 10px 28px rgba(245, 166, 35, 0.5); }
.btn-ghost { border-color: rgba(148, 184, 255, 0.35); color: var(--cyan); }
.btn-ghost:hover { border-color: var(--cyan); background: rgba(56, 189, 248, 0.08); }
.btn-lg { padding: 14px 38px; font-size: 16.5px; }

/* ==========================================================
   Hero（首页首屏）
   ========================================================== */
.hero { position: relative; padding: 104px 0 92px; text-align: center; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 44px 44px;
  -webkit-mask-image: radial-gradient(ellipse 85% 75% at 50% 30%, #000 25%, transparent 75%);
  mask-image: radial-gradient(ellipse 85% 75% at 50% 30%, #000 25%, transparent 75%);
}
.hero::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(640px 320px at 50% 108%, rgba(46, 124, 246, 0.22), transparent 70%);
}
.hero-inner { position: relative; z-index: 1; }

.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  border: 1px solid rgba(56, 189, 248, 0.35); border-radius: 999px;
  background: rgba(46, 124, 246, 0.12); color: #9cc4f8;
  padding: 6px 16px; font-size: 13px; letter-spacing: 2px;
}
.hero-badge::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%;
  background: var(--cyan); box-shadow: 0 0 10px var(--cyan);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.35; } }

.hero h1 {
  margin-top: 22px; font-size: clamp(34px, 5.2vw, 58px); font-weight: 800;
  color: var(--text); letter-spacing: 2px; line-height: 1.25;
}
.hero .grad-text {
  background: var(--grad-blue);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-subline {
  margin-top: 14px; font-size: clamp(17px, 2.2vw, 21px);
  color: var(--muted); font-weight: 400;
}
.hero-desc { margin: 24px auto 0; max-width: 760px; color: var(--body); font-size: 16px; }
.hero-actions { margin-top: 36px; display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero-points {
  list-style: none; margin-top: 44px; display: flex; gap: 30px;
  justify-content: center; flex-wrap: wrap;
}
.hero-points li {
  display: flex; align-items: center; gap: 8px; color: var(--muted); font-size: 14px;
}
.hero-points svg { width: 16px; height: 16px; color: var(--cyan); flex-shrink: 0; }

/* ==========================================================
   内页 Hero
   ========================================================== */
.page-hero { position: relative; padding: 76px 0 64px; text-align: center; overflow: hidden; }
.page-hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 44px 44px;
  -webkit-mask-image: radial-gradient(ellipse 75% 100% at 50% 0%, #000 20%, transparent 78%);
  mask-image: radial-gradient(ellipse 75% 100% at 50% 0%, #000 20%, transparent 78%);
}
.page-hero-inner { position: relative; z-index: 1; }
.page-hero h1 { font-size: clamp(28px, 4vw, 40px); font-weight: 800; color: var(--text); letter-spacing: 1px; }
.page-hero p { color: var(--muted); margin-top: 12px; font-size: 15.5px; }

/* ==========================================================
   数据统计条
   ========================================================== */
.stats-bar {
  border-top: 1px solid rgba(148, 184, 255, 0.1);
  border-bottom: 1px solid rgba(148, 184, 255, 0.1);
  background: rgba(13, 28, 51, 0.55);
  padding: 30px 0;
}
.stats-inner { display: flex; justify-content: space-around; gap: 20px; flex-wrap: wrap; }
.stat-item { text-align: center; min-width: 130px; }
.stat-num {
  font-size: clamp(26px, 3.4vw, 34px); font-weight: 800;
  background: var(--grad-accent);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  letter-spacing: 1px;
}
.stat-label { font-size: 13px; color: var(--muted); margin-top: 4px; letter-spacing: 2px; }

/* ==========================================================
   通用区块
   ========================================================== */
.section { padding: 84px 0; }
.section-alt { background: rgba(13, 28, 51, 0.45); border-top: 1px solid rgba(148, 184, 255, 0.07); border-bottom: 1px solid rgba(148, 184, 255, 0.07); }
.section-title {
  text-align: center; font-size: clamp(24px, 3vw, 32px); font-weight: 800;
  color: var(--text); letter-spacing: 1px;
}
.section-title::after {
  content: ""; display: block; width: 52px; height: 3px; margin: 16px auto 0;
  background: var(--grad-blue); border-radius: 2px;
  box-shadow: 0 0 12px rgba(56, 189, 248, 0.6);
}
.section-lead { text-align: center; color: var(--muted); margin: 14px auto 44px; max-width: 780px; }

.block-head { display: flex; align-items: center; gap: 12px; margin-bottom: 26px; flex-wrap: wrap; }
.block-head::before {
  content: ""; width: 6px; height: 26px; border-radius: 3px;
  background: var(--grad-blue); box-shadow: 0 0 10px rgba(56, 189, 248, 0.5);
}
.block-head h3 { font-size: 21px; color: var(--text); }
.block-head span { font-size: 14px; color: var(--muted); }

/* ==========================================================
   图标
   ========================================================== */
.icon {
  width: 48px; height: 48px; display: inline-flex; align-items: center; justify-content: center;
  border-radius: 12px; flex-shrink: 0;
  background: linear-gradient(135deg, rgba(46, 124, 246, 0.18), rgba(56, 189, 248, 0.07));
  border: 1px solid rgba(56, 189, 248, 0.28); color: var(--cyan);
}
.icon svg { width: 24px; height: 24px; }
.icon-lg { width: 58px; height: 58px; border-radius: 14px; }
.icon-lg svg { width: 28px; height: 28px; }

/* ==========================================================
   卡片通用
   ========================================================== */
.cab-card, .product-card, .feature-card, .about-card, .contact-card, .service-card {
  position: relative; overflow: hidden;
  background: var(--card);
  border: 1px solid var(--border); border-radius: var(--radius);
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  padding: 26px 24px;
  transition: transform .22s, border-color .22s, box-shadow .22s;
}
.cab-card::before, .product-card::before, .feature-card::before,
.about-card::before, .contact-card::before, .service-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(56, 189, 248, 0.65), transparent);
  opacity: 0; transition: opacity .25s;
}
.cab-card:hover, .product-card:hover, .feature-card:hover,
.about-card:hover, .contact-card:hover, .service-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  box-shadow: 0 14px 34px rgba(46, 124, 246, 0.16);
}
.cab-card:hover::before, .product-card:hover::before, .feature-card:hover::before,
.about-card:hover::before, .contact-card:hover::before, .service-card:hover::before { opacity: 1; }

.cab-card h3, .product-card h3, .feature-card h3, .about-card h3 { color: var(--text); font-size: 17.5px; margin-top: 14px; }
.cab-card p, .product-card p, .feature-card p, .about-card p { color: var(--body); font-size: 14px; margin-top: 6px; }
.about-num {
  position: absolute; right: 16px; top: 8px; font-size: 52px; font-weight: 800;
  color: rgba(56, 189, 248, 0.09);
}

/* ==========================================================
   标签
   ========================================================== */
.spec-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 14px; }
.spec-tag {
  background: rgba(46, 124, 246, 0.12); color: #9cc4f8;
  font-size: 12px; padding: 3px 12px; border-radius: 999px;
  border: 1px solid rgba(46, 124, 246, 0.3);
}

/* ==========================================================
   网格布局
   ========================================================== */
.cab-grid, .product-grid, .features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.about-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.industry-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.contact-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }

/* ==========================================================
   首页双业务入口
   ========================================================== */
.entry-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.entry-card {
  position: relative; overflow: hidden;
  background: linear-gradient(150deg, rgba(46, 124, 246, 0.10), rgba(13, 28, 51, 0.6) 55%);
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 36px 32px; text-decoration: none; display: block;
  transition: transform .22s, border-color .22s, box-shadow .22s;
}
.entry-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(56, 189, 248, 0.7), transparent);
  opacity: 0; transition: opacity .25s;
}
.entry-card:hover { transform: translateY(-4px); border-color: var(--border-strong); box-shadow: 0 16px 40px rgba(46, 124, 246, 0.18); }
.entry-card:hover::before { opacity: 1; }
.entry-card h3 { color: var(--text); font-size: 23px; margin-top: 18px; }
.entry-card .entry-desc { color: var(--body); font-size: 14.5px; margin-top: 8px; }
.entry-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 18px; }
.entry-more {
  display: inline-flex; align-items: center; gap: 6px; margin-top: 22px;
  color: var(--cyan); font-size: 14.5px; font-weight: 600;
}
.entry-more svg { width: 16px; height: 16px; transition: transform .2s; }
.entry-card:hover .entry-more svg { transform: translateX(4px); }

/* ==========================================================
   行业速览（首页）
   ========================================================== */
.industry-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.industry-item {
  display: block; text-decoration: none; text-align: center;
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 30px 18px; transition: transform .22s, border-color .22s, box-shadow .22s;
}
.industry-item:hover { transform: translateY(-4px); border-color: var(--border-strong); box-shadow: 0 14px 34px rgba(46, 124, 246, 0.16); }
.industry-item .icon { margin: 0 auto; }
.industry-item h3 { color: var(--text); font-size: 16px; margin-top: 14px; }
.industry-item p { color: var(--muted); font-size: 13px; margin-top: 6px; }

/* ==========================================================
   服务流程
   ========================================================== */
.step-flow { display: grid; grid-template-columns: repeat(6, 1fr); gap: 16px; }
.step-card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px 16px; text-align: center;
  transition: transform .22s, border-color .22s, box-shadow .22s;
}
.step-card:hover { transform: translateY(-4px); border-color: var(--border-strong); box-shadow: 0 14px 34px rgba(46, 124, 246, 0.16); }
.step-num {
  width: 38px; height: 38px; margin: 0 auto 12px; border-radius: 50%;
  background: var(--grad-blue); color: #fff; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 0 16px rgba(46, 124, 246, 0.45);
}
.step-card h4 { color: var(--text); font-size: 15px; }
.step-card p { color: var(--muted); font-size: 12.5px; margin-top: 6px; }

/* ==========================================================
   行业案例（行业方案页）
   ========================================================== */
.case-list { display: flex; flex-direction: column; gap: 20px; }
.case-card {
  display: flex; flex-direction: column;
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  transition: border-color .22s, box-shadow .22s;
}
.case-card:hover { border-color: var(--border-strong); box-shadow: 0 14px 34px rgba(46, 124, 246, 0.14); }
.case-row { display: grid; grid-template-columns: 220px 1fr; gap: 28px; padding: 30px 32px; }
/* 案例大图媒体区：图片就位前显示占位符 */
.case-media {
  position: relative; aspect-ratio: 21 / 9; max-height: 380px;
  border-bottom: 1px solid rgba(148, 184, 255, 0.12);
  background: var(--bg-2); overflow: hidden;
}
.case-media img { width: 100%; height: 100%; object-fit: cover; display: block; }
.media-placeholder {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px;
  color: var(--dim);
  background:
    radial-gradient(420px 160px at 50% 0%, rgba(56, 189, 248, 0.10), transparent 70%),
    repeating-linear-gradient(0deg, transparent 0 23px, rgba(148, 184, 255, 0.05) 23px 24px),
    repeating-linear-gradient(90deg, transparent 0 23px, rgba(148, 184, 255, 0.05) 23px 24px);
}
.media-placeholder svg { opacity: 0.55; }
.media-placeholder span { font-size: 13px; letter-spacing: 2px; color: var(--muted); }
.case-aside { border-right: 1px solid rgba(148, 184, 255, 0.12); padding-right: 28px; }
.case-aside h3 { color: var(--text); font-size: 20px; margin-top: 14px; }
.case-aside .case-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 12px; }
.case-aside .case-tags span {
  font-size: 11.5px; color: var(--muted);
  border: 1px solid var(--border); border-radius: 999px; padding: 2px 10px;
}
.case-body h4 { color: var(--cyan); font-size: 14px; letter-spacing: 2px; margin-bottom: 8px; }
.case-body p { color: var(--body); font-size: 14.5px; }
.case-body ul { margin-top: 14px; padding-left: 2px; list-style: none; display: flex; flex-direction: column; gap: 8px; }
.case-body ul li { position: relative; padding-left: 24px; color: var(--body); font-size: 14px; }
.case-body ul li::before {
  content: ""; position: absolute; left: 0; top: 8px;
  width: 14px; height: 2px; border-radius: 2px; background: var(--grad-blue);
}

/* ==========================================================
   公司介绍（关于我们页）
   ========================================================== */
.intro-block { max-width: 860px; margin: 0 auto; text-align: center; }
.intro-block p { color: var(--body); font-size: 15.5px; margin-top: 18px; }
.intro-block strong { color: var(--text); }

/* ==========================================================
   下载预览横幅（首页）
   ========================================================== */
.download-banner {
  position: relative; overflow: hidden;
  display: flex; align-items: center; gap: 28px; flex-wrap: wrap;
  background: linear-gradient(135deg, rgba(46, 124, 246, 0.14), rgba(13, 28, 51, 0.7));
  border: 1px solid var(--border-strong); border-radius: var(--radius);
  padding: 38px 40px;
}
.download-banner::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(420px 200px at 100% 0%, rgba(56, 189, 248, 0.16), transparent 70%);
}
.dl-banner-icon {
  width: 64px; height: 64px; border-radius: 16px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  background: var(--grad-blue); color: #fff;
  box-shadow: 0 0 26px rgba(46, 124, 246, 0.55);
}
.dl-banner-icon svg { width: 30px; height: 30px; }
.dl-banner-info { flex: 1; min-width: 240px; }
.dl-banner-info h3 { color: var(--text); font-size: 21px; }
.dl-version { font-size: clamp(24px, 3vw, 30px); font-weight: 800; color: var(--accent); margin-top: 4px; }
.dl-notes { color: var(--muted); font-size: 14px; margin-top: 4px; max-width: 560px; }

/* ==========================================================
   CTA 横幅
   ========================================================== */
.cta-banner {
  position: relative; overflow: hidden; text-align: center;
  background:
    radial-gradient(600px 240px at 50% 120%, rgba(245, 166, 35, 0.14), transparent 70%),
    linear-gradient(135deg, rgba(46, 124, 246, 0.16), rgba(13, 28, 51, 0.7));
  border: 1px solid var(--border-strong); border-radius: var(--radius);
  padding: 52px 40px;
}
.cta-banner h3 { color: var(--text); font-size: clamp(22px, 3vw, 28px); font-weight: 800; }
.cta-banner p { color: var(--muted); margin-top: 10px; }
.cta-banner .btn { margin-top: 26px; }

/* ==========================================================
   联系我们页
   ========================================================== */
.contact-card { text-align: center; padding: 34px 24px; }
.contact-card .icon { margin: 0 auto; }
.contact-card h3 { color: var(--text); font-size: 16.5px; margin-top: 16px; }
.contact-card .contact-value {
  display: inline-block; margin-top: 10px; color: var(--cyan);
  font-size: 18px; font-weight: 700; text-decoration: none; transition: color .2s;
}
.contact-card .contact-value:hover { color: #7dd3fc; }
.contact-card p.sub { color: var(--muted); font-size: 13.5px; margin-top: 6px; }
.contact-tips {
  max-width: 760px; margin: 56px auto 0;
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 30px 34px;
}
.contact-tips h3 { color: var(--text); font-size: 17px; display: flex; align-items: center; gap: 10px; }
.contact-tips h3 svg { width: 20px; height: 20px; color: var(--cyan); }
.contact-tips ul { list-style: none; margin-top: 14px; display: flex; flex-direction: column; gap: 10px; }
.contact-tips li { position: relative; padding-left: 24px; color: var(--body); font-size: 14.5px; }
.contact-tips li::before {
  content: ""; position: absolute; left: 0; top: 9px;
  width: 14px; height: 2px; border-radius: 2px; background: var(--grad-blue);
}

/* ==========================================================
   页脚
   ========================================================== */
.site-footer { background: #081224; border-top: 1px solid rgba(148, 184, 255, 0.1); padding: 44px 0 26px; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; gap: 24px; flex-wrap: wrap; }
.footer-sub { color: var(--muted); font-size: 13.5px; margin-top: 8px; }
.footer-links { display: flex; gap: 22px; flex-wrap: wrap; }
.footer-links a { color: var(--muted); text-decoration: none; font-size: 14px; transition: color .2s; }
.footer-links a:hover { color: var(--cyan); }
.footer-bottom {
  margin-top: 30px; padding-top: 18px;
  border-top: 1px solid rgba(148, 184, 255, 0.08);
  text-align: center; color: var(--dim); font-size: 13px;
}
/* ICP 备案号：链接热区按手机端 ≥44px 处理，不撑高页脚行距 */
.footer-icp { margin-top: 4px; }
.footer-icp a {
  color: var(--dim); text-decoration: none;
  display: inline-block; padding: 11px 8px; margin: -11px -8px;
  transition: color .2s;
}
.footer-icp a:hover { color: var(--cyan); }

/* ==========================================================
   下载中心页
   ========================================================== */
.download-card {
  background: var(--card); border: 1px solid var(--border-strong);
  border-radius: var(--radius); padding: 36px 38px;
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  box-shadow: var(--shadow);
}
.dl-card-loading { color: var(--muted); }
.dl-card-error { color: #f28b82; padding: 14px 0; }
.dl-card-head { display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap; }
.dl-card-head h2 { color: var(--text); font-size: 28px; }
.dl-badge {
  background: var(--grad-accent); color: #1f2b38; font-size: 13px; font-weight: 700;
  padding: 3px 14px; border-radius: 999px;
}
.download-card .dl-notes { color: var(--body); font-size: 14.5px; margin-top: 10px; }
.dl-meta { color: var(--muted); font-size: 14px; margin-top: 10px; display: flex; gap: 20px; flex-wrap: wrap; }
.dl-actions { margin-top: 24px; display: flex; gap: 14px; flex-wrap: wrap; }
.dl-btn {
  display: inline-block; padding: 12px 28px; border-radius: 10px; font-size: 15px;
  font-weight: 600; text-decoration: none; transition: all .2s;
}
.dl-btn-main { background: var(--grad-blue); color: #fff; box-shadow: 0 6px 20px rgba(46, 124, 246, 0.35); }
.dl-btn-main:hover { transform: translateY(-2px); box-shadow: 0 10px 28px rgba(46, 124, 246, 0.5); }
.dl-btn-ghost { border: 1.5px solid var(--border-strong); color: var(--cyan); }
.dl-btn-ghost:hover { background: rgba(56, 189, 248, 0.1); border-color: var(--cyan); }
.dl-btn-disabled { background: rgba(148, 184, 255, 0.08); color: var(--dim); cursor: not-allowed; }

.history-list { display: flex; flex-direction: column; gap: 14px; }
.history-item {
  background: var(--card); border: 1px solid var(--border); border-radius: 12px;
  padding: 18px 22px; display: flex; align-items: center; justify-content: space-between;
  gap: 18px; flex-wrap: wrap; transition: border-color .2s;
}
.history-item:hover { border-color: var(--border-strong); }
.history-item .h-name { font-weight: 600; color: var(--text); }
.history-item .h-meta { color: var(--muted); font-size: 13px; margin-top: 4px; }
.history-empty { color: var(--muted); text-align: center; padding: 30px 0; }

.note-box {
  background: rgba(245, 166, 35, 0.06); border: 1px solid rgba(245, 166, 35, 0.28);
  border-radius: 12px; padding: 24px 28px; margin-top: 44px; font-size: 14.5px;
}
.note-box h3 { color: var(--accent); margin-bottom: 12px; font-size: 16.5px; }
.note-box ul { padding-left: 20px; color: var(--body); }
.note-box li { margin: 8px 0; }
.note-box code { background: rgba(245, 166, 35, 0.14); padding: 2px 7px; border-radius: 5px; font-size: 13px; color: #f5c56e; }
.note-box strong { color: var(--text); }

/* ==========================================================
   下载中心动态渲染补充（main.js 输出结构）
   ========================================================== */
.dl-empty { color: var(--muted); padding: 10px 0; }
/* 分产品下载组（ERP 管理系统 / 动环监测） */
.dl-group { margin-bottom: 56px; }
.dl-group:last-child { margin-bottom: 0; }
.dl-group-head {
  display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap;
  margin-bottom: 20px; padding-bottom: 14px;
  border-bottom: 1px solid rgba(148, 184, 255, 0.12);
}
.dl-group-head h2 { color: var(--text); font-size: 24px; }
.dl-group .history-list { margin-top: 20px; }
.dl-item { padding: 22px 0; border-bottom: 1px solid rgba(148, 184, 255, 0.1); }
.dl-item:last-child { border-bottom: none; }
.dl-item h3 { color: var(--text); font-size: 19px; }
.dl-item-notes { color: var(--muted); font-size: 14px; margin-top: 4px; }
.dl-item-meta { color: var(--muted); font-size: 13px; margin-top: 6px; }
.dl-item-actions { margin-top: 14px; display: flex; gap: 12px; flex-wrap: wrap; }

/* ---- 分区快速导航（吸顶，手机横向滑动不折行） ---- */
.dl-toc {
  position: sticky; top: 64px; z-index: 30;
  background: rgba(10, 22, 40, 0.92);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.dl-toc-inner { display: flex; gap: 8px; overflow-x: auto; -webkit-overflow-scrolling: touch; padding-top: 10px; padding-bottom: 10px; scrollbar-width: none; }
.dl-toc-inner::-webkit-scrollbar { display: none; }
.dl-toc a {
  flex: 0 0 auto; color: var(--muted); text-decoration: none; font-size: 13.5px;
  padding: 6px 14px; border: 1px solid var(--border); border-radius: 999px;
  white-space: nowrap; transition: all .2s;
}
.dl-toc a:hover { color: var(--text); border-color: var(--border-strong); background: rgba(56, 189, 248, 0.08); }
/* 锚点跳转时避开吸顶层：固定头部 64 + 分区导航条 ≈60（实测吸顶总高 123.6px，留 ≈10px 缝隙） */
section[id] { scroll-margin-top: 134px; }

/* ---- 分类下载卡片 ---- */
.dl-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 22px; }
.dl-card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 26px 26px 24px;
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  transition: border-color .2s, transform .2s;
}
.dl-card:hover { border-color: var(--border-strong); transform: translateY(-3px); }
.dl-card.is-hidden { display: none; }
/* 尚无已发布安装包：虚线框 + 「联系获取」，不给空链接 */
.dl-card-na { border-style: dashed; }
.dl-card-na:hover { transform: none; }
.dl-card-head { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.dl-card-head h3 { color: var(--text); font-size: 20px; }
.dl-status { font-size: 12.5px; font-weight: 600; color: var(--dim); border: 1px dashed var(--border); border-radius: 999px; padding: 2px 12px; }
.dl-card-sum { color: var(--body); font-size: 14.5px; margin-top: 10px; }
.dl-card-ed { color: var(--cyan); font-size: 14px; margin-top: 12px; padding-left: 12px; border-left: 2px solid rgba(56, 189, 248, 0.4); }
.dl-card-note {
  color: var(--muted); font-size: 13px; margin-top: 12px; padding: 9px 14px;
  background: rgba(245, 166, 35, 0.08); border-left: 3px solid var(--accent); border-radius: 0 8px 8px 0;
}
.dl-card .dl-actions { margin-top: 18px; }
.dl-tags { display: flex; gap: 7px; flex-wrap: wrap; margin-top: 14px; }
.dl-tags span { font-size: 12.5px; color: var(--muted); background: rgba(148, 184, 255, 0.08); border: 1px solid var(--border); border-radius: 6px; padding: 2px 9px; }

/* ---- 分类筛选标签 ---- */
.dl-chips { display: flex; gap: 9px; flex-wrap: wrap; margin-bottom: 26px; }
.dl-chip {
  background: rgba(148, 184, 255, 0.06); border: 1px solid var(--border); color: var(--muted);
  font: inherit; font-size: 13.5px; padding: 7px 17px; border-radius: 999px;
  cursor: pointer; transition: all .2s; min-height: 40px;
}
.dl-chip:hover { color: var(--text); border-color: var(--border-strong); }
.dl-chip.active { background: var(--grad-blue); border-color: transparent; color: #fff; font-weight: 600; }

/* ==========================================================
   滚动渐入动画
   ========================================================== */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .65s ease, transform .65s ease; }
.reveal.revealed { opacity: 1; transform: none; }

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

/* ==========================================================
   响应式
   ========================================================== */
@media (max-width: 980px) {
  .step-flow { grid-template-columns: repeat(3, 1fr); }
  .industry-grid { grid-template-columns: repeat(2, 1fr); }
  .industry-strip { grid-template-columns: repeat(2, 1fr); }
  /* 中屏顶栏让位策略：让出右侧 CTA 按钮保住公司全称（旧规则藏全称会造出 861-980px 空窗）
     实测 861px 下：logo 252 + 导航 509 + 容器内边距 48 = 809px，全称 14px 可容纳 */
  .nav-cta { display: none; }
  .logo-text { font-size: 14px; }
  .case-row { grid-template-columns: 1fr; gap: 20px; padding: 24px 24px 26px; }
  .case-aside { border-right: none; border-bottom: 1px solid rgba(148, 184, 255, 0.12); padding-right: 0; padding-bottom: 20px; }
}
@media (max-width: 860px) {
  .site-nav {
    display: none; position: absolute; top: 64px; left: 0; right: 0;
    background: rgba(8, 18, 33, 0.98); flex-direction: column; gap: 0;
    padding: 10px 24px 18px; border-bottom: 1px solid rgba(148, 184, 255, 0.1);
  }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 13px 0; border-bottom: 1px solid rgba(148, 184, 255, 0.07); }
  .site-nav a::after { display: none; }
  .nav-toggle { display: inline-flex; }
  /* 窄屏紧凑 logo：图形收窄，保证与汉堡按钮不挤压 */
  .logo { gap: 8px; }
  .logo-mark { padding: 3px 7px; }
  /* 官方组合图为横向构图（320×226），窄屏按高等比收窄 */
  .logo-img { height: 26px; }
  .logo-text { font-size: 13px; }
  .hero { padding: 72px 0 64px; }
  .entry-grid, .cab-grid, .product-grid, .features-grid, .about-grid, .contact-grid, .service-grid { grid-template-columns: 1fr; }
  .download-banner { padding: 28px 24px; }
}
@media (max-width: 640px) {
  .industry-grid, .industry-strip { grid-template-columns: 1fr; }
  .step-flow { grid-template-columns: 1fr; }
  .section { padding: 60px 0; }
  .cta-banner { padding: 40px 24px; }
  .download-card { padding: 26px 22px; }
  /* 顶栏全称再降一号，保证 320px 窄屏下不与汉堡按钮挤压 */
  .logo-text { font-size: 12px; }
  /* 汉堡按钮已达 44px 触控建议值（基础样式即 44×44） */
  /* 取消信息列 240px 下限，避免极窄屏（<332px）下载横幅横向溢出 */
  .dl-banner-info { min-width: 0; }
  /* 桌面端两行排版用的硬换行在手机会折出参差碎行，取消 */
  .hero-desc br { display: none; }
  /* 下载中心手机适配：卡片单列、按钮整行可点、筛选标签改横向滑动且达 44px 触控高度 */
  .dl-grid { grid-template-columns: 1fr; gap: 16px; }
  .dl-card { padding: 22px 20px; }
  .dl-card:hover { transform: none; }
  .dl-card .dl-actions { flex-direction: column; gap: 10px; }
  .dl-card .dl-actions .btn { display: block; width: 100%; text-align: center; }
  .dl-chips { flex-wrap: nowrap; overflow-x: auto; -webkit-overflow-scrolling: touch; padding-bottom: 4px; scrollbar-width: none; }
  .dl-chips::-webkit-scrollbar { display: none; }
  .dl-chip { flex: 0 0 auto; min-height: 44px; }
  .dl-item-actions .btn { min-height: 44px; }
  /* 分区导航胶囊在手机下也达 44px 触控高度 */
  .dl-toc a { display: inline-flex; align-items: center; min-height: 44px; }
  /* 分区导航胶囊在手机更高（吸顶总高实测 129px），锚点留白相应放宽 */
  section[id] { scroll-margin-top: 140px; }
  /* 页脚纯文本链接手机下点击区域过小，补足到 44px 触控高度 */
  .footer-links { gap: 6px 22px; }
  .footer-links a { display: inline-flex; align-items: center; min-height: 44px; }
  /* 头部与页脚的 logo 链接、联系方式 tel:/mailto: 链接同样补到 44px 触控高度 */
  .logo { min-height: 44px; }
  .contact-card .contact-value { display: inline-flex; align-items: center; min-height: 44px; }
  /* 正文行内链接：用 padding + 等量负 margin 扩热区到 45px，不撑高行距（视觉不变） */
  .note-box a { display: inline-block; padding: 13px 0; margin: -13px 0; }
}