/* ============================================================
   PogoLink 精密连接器科技 · 官网样式表
   设计系统：深蓝科技蓝 + 金属银灰 + 白
   工业 B2B 风格：克制、高信息密度、精密感
   ============================================================ */

:root {
  /* 色板 */
  --navy-950: #060F1F;
  --navy-900: #0A182E;
  --navy-800: #0E2039;
  --navy-700: #142A4A;
  --navy-600: #1D3A63;
  --blue-600: #1B55B8;
  --blue-500: #2468D6;
  --blue-400: #3D7FF0;
  --blue-100: #DCE7F7;
  --steel-50: #F6F8FB;
  --steel-100: #EFF2F7;
  --steel-200: #E2E8F0;
  --steel-300: #CDD7E4;
  --text-900: #0F1B2D;
  --text-700: #33445C;
  --text-500: #5A6B82;
  --text-400: #8291A6;
  --white: #FFFFFF;
  --line: #DFE6EF;

  /* 字体 */
  --font: "Segoe UI", "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  --font-num: "Segoe UI", "DIN Alternate", "Bahnschrift", "Microsoft YaHei", sans-serif;

  /* 版式 */
  --container: 1200px;
  --radius: 6px;
  --radius-lg: 10px;
  --shadow-card: 0 2px 10px rgba(10, 28, 54, 0.07);
  --shadow-hover: 0 12px 28px rgba(10, 28, 54, 0.14);
  --header-h: 72px;
}

/* ============ 基础 ============ */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--text-900);
  background: var(--white);
  line-height: 1.7;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--blue-500); text-decoration: none; }
ul { list-style: none; }
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

h1, h2, h3, h4 { line-height: 1.35; font-weight: 700; color: var(--text-900); }
h2 { font-size: 30px; }
h3 { font-size: 19px; }

:focus-visible { outline: 2px solid var(--blue-400); outline-offset: 2px; }

::selection { background: var(--blue-500); color: #fff; }

/* ============ 顶部导航 ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--navy-900);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  transition: box-shadow .25s ease, background .25s ease;
}
.site-header.scrolled { box-shadow: 0 6px 20px rgba(4, 12, 26, .35); }
.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand svg { width: 34px; height: 34px; }
.brand-name { color: #fff; font-weight: 700; font-size: 18px; letter-spacing: .5px; line-height: 1.2; }
.brand-name small { display: block; font-size: 10px; font-weight: 400; color: #8FA6C6; letter-spacing: 1.5px; text-transform: uppercase; }

.main-nav ul { display: flex; gap: 6px; align-items: center; }
.main-nav a {
  display: block;
  padding: 8px 14px;
  color: #C6D2E2;
  font-size: 15px;
  border-radius: 4px;
  transition: color .2s, background .2s;
}
.main-nav a:hover { color: #fff; background: rgba(255,255,255,0.06); }
.main-nav a.active { color: #fff; background: var(--blue-500); }
.nav-cta {
  margin-left: 8px;
  padding: 8px 18px;
  border: 1px solid var(--blue-400);
  color: #fff !important;
  border-radius: 4px;
  background: var(--blue-500);
  transition: background .2s;
}
.nav-cta:hover { background: var(--blue-400); }

.menu-toggle { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
.menu-toggle span { display: block; width: 22px; height: 2px; background: #fff; margin: 5px 0; transition: .25s; }
.menu-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============ 按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 4px;
  border: 1px solid transparent;
  cursor: pointer;
  font-family: var(--font);
  transition: background .2s, border-color .2s, color .2s, transform .15s;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--blue-500); color: #fff; }
.btn-primary:hover { background: var(--blue-400); }
.btn-outline-light { border-color: rgba(255,255,255,.7); color: #fff; background: transparent; }
.btn-outline-light:hover { background: rgba(255,255,255,.12); border-color: #fff; }
.btn-outline-dark { border-color: var(--steel-300); color: var(--text-900); background: transparent; }
.btn-outline-dark:hover { border-color: var(--blue-500); color: var(--blue-500); }
.btn-ghost-blue { color: var(--blue-500); background: transparent; padding: 6px 10px; font-weight: 600; }
.btn-ghost-blue:hover { background: var(--blue-100); }
.btn-block { width: 100%; }
.btn-sm { padding: 8px 16px; font-size: 13px; }
.btn-lg { padding: 14px 34px; font-size: 16px; }

/* ============ 区块通用 ============ */
.section { padding: 84px 0; }
.section-dark { background: var(--navy-900); color: #D7E0EC; }
.section-dark h2, .section-dark h3 { color: #fff; }
.section-steel { background: var(--steel-50); }

.sec-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; margin-bottom: 40px; }
.sec-eyebrow {
  display: flex; align-items: center; gap: 10px;
  font-size: 13px; font-weight: 600; letter-spacing: 2px;
  color: var(--blue-500); margin-bottom: 10px;
}
.sec-eyebrow::before { content: ""; width: 26px; height: 3px; background: var(--blue-500); }
.section-dark .sec-eyebrow { color: var(--blue-400); }
.section-dark .sec-eyebrow::before { background: var(--blue-400); }
.sec-title { margin-bottom: 12px; }
.sec-lead { color: var(--text-500); max-width: 640px; font-size: 15px; }
.section-dark .sec-lead { color: #9FB1C8; }
.sec-more { flex-shrink: 0; }

/* ============ Hero（首页） ============ */
.hero {
  position: relative;
  background-color: var(--navy-900);
  background-image:
    linear-gradient(rgba(10,22,44,0.4), rgba(6,16,32,0.62)),
    url("../assets/img/bg-hero-mountain.jpg");
  background-size: cover;
  background-position: center center;
  color: #EAF0F8;
  overflow: hidden;
}
.hero-grid-bg {
  position: absolute; inset: 0; opacity: .5; pointer-events: none;
  background-image:
    linear-gradient(rgba(120,155,205,.14) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120,155,205,.14) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(900px 500px at 60% 40%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(900px 500px at 60% 40%, #000 30%, transparent 75%);
}
.hero-inner {
  position: relative;
  max-width: var(--container);
  margin: 0 auto;
  padding: 104px 24px 96px;
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 48px;
  align-items: center;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  border: 1px solid rgba(120,160,215,.4);
  color: #A9C3E4; font-size: 13px;
  padding: 6px 14px; border-radius: 100px; margin-bottom: 22px;
  background: rgba(20,45,80,.35);
}
.hero h1 { color: #fff; font-size: 44px; line-height: 1.25; letter-spacing: .5px; margin-bottom: 20px; }
.hero h1 .accent { color: var(--blue-400); }
.hero-sub { color: #B4C3D8; font-size: 16px; max-width: 540px; margin-bottom: 34px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stats {
  margin-top: 46px;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px;
  border-top: 1px solid rgba(255,255,255,.12); padding-top: 26px;
}
.hero-stat .num { font-family: var(--font-num); font-size: 30px; font-weight: 700; color: #fff; font-variant-numeric: tabular-nums; }
.hero-stat .num em { font-style: normal; color: var(--blue-400); font-size: 20px; }
.hero-stat .label { font-size: 13px; color: #8FA3BF; margin-top: 2px; }

/* Hero 右侧示意图 */
.hero-figure { position: relative; }
.hero-figure .schematic {
  background: rgba(14,32,57,.65);
  border: 1px solid rgba(110,150,205,.35);
  border-radius: var(--radius-lg);
  padding: 26px;
}
.hero-figure .schematic-title {
  display: flex; align-items: center; gap: 8px;
  font-size: 13px; color: #9FB6D6; letter-spacing: 1px; margin-bottom: 14px;
}
.hero-figure .schematic-title::before { content: ""; width: 8px; height: 8px; background: var(--blue-400); border-radius: 50%; }
.hero-figure .spec-tag {
  position: absolute; background: rgba(12,26,48,.92);
  border: 1px solid rgba(110,150,205,.45); border-radius: 6px;
  padding: 8px 12px; font-size: 12px; color: #C9D8EC;
  box-shadow: 0 8px 20px rgba(0,0,0,.3);
}
.spec-tag b { display: block; font-size: 15px; color: #fff; font-family: var(--font-num); font-variant-numeric: tabular-nums; }
.spec-tag.t1 { top: 2%; right: -5%; left: auto; }
.spec-tag.t2 { bottom: 10%; left: -5%; right: auto; }

/* ============ 产品入口卡片（首页/产品页共用） ============ */
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.product-card {
  background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius-lg); overflow: hidden;
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
  display: flex; flex-direction: column;
}
.product-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
  border-color: var(--blue-400);
}
.product-card .thumb { position: relative; overflow: hidden; aspect-ratio: 4 / 3; background: var(--navy-800); }
.product-card .thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.product-card:hover .thumb img { transform: scale(1.06); }
.product-card .thumb .series-mark {
  position: absolute; top: 12px; left: 12px;
  background: rgba(8,22,40,.82); color: #CFE0F5;
  font-size: 12px; padding: 4px 10px; border-radius: 100px;
  border: 1px solid rgba(120,160,215,.4);
}
.product-card .body { padding: 20px 22px 22px; display: flex; flex-direction: column; flex: 1; }
.product-card h3 { font-size: 17px; margin-bottom: 6px; }
.product-card .en { font-size: 12px; color: var(--text-400); letter-spacing: 1px; text-transform: uppercase; margin-bottom: 12px; }
.product-card .params { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 16px; margin-bottom: 16px; }
.product-card .params div { font-size: 13px; color: var(--text-500); }
.product-card .params b { display: block; color: var(--text-900); font-weight: 600; font-family: var(--font-num); font-variant-numeric: tabular-nums; }
.product-card .card-foot { margin-top: auto; display: flex; align-items: center; justify-content: space-between; padding-top: 14px; border-top: 1px solid var(--line); }
.product-card .card-foot .btn-ghost-blue { padding-left: 0; }

/* ============ 实力数据带 ============ */
.stats-band { background: var(--navy-900); position: relative; overflow: hidden; }
.stats-band::after {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(800px 300px at 50% 0%, rgba(36,104,214,.16), transparent 70%);
  pointer-events: none;
}
.stats-grid {
  position: relative;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
}
.stat-item { text-align: center; padding: 8px 12px; }
.stat-item .num { font-family: var(--font-num); font-size: 46px; font-weight: 700; color: #fff; font-variant-numeric: tabular-nums; }
.stat-item .num em { font-style: normal; color: var(--blue-400); font-size: 26px; }
.stat-item .label { color: #93A7C2; font-size: 14px; margin-top: 4px; }
.stat-item .desc { color: #64799A; font-size: 12px; margin-top: 2px; }
.stats-note { text-align: center; color: #5F7493; font-size: 12px; margin-top: 22px; }

/* ============ 应用领域 ============ */
.app-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.app-card {
  border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: hidden;
  background: #fff; transition: transform .25s, box-shadow .25s, border-color .25s;
  display: flex; flex-direction: column;
}
.app-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-hover); border-color: var(--blue-400); }
.app-card .thumb { aspect-ratio: 16 / 10; overflow: hidden; background: var(--navy-800); }
.app-card .thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.app-card:hover .thumb img { transform: scale(1.05); }
.app-card .body { padding: 20px 22px; }
.app-card h3 { font-size: 16px; margin-bottom: 6px; }
.app-card p { font-size: 13.5px; color: var(--text-500); }

/* ============ Logo 墙 ============ */
.logo-wall {
  display: grid; grid-template-columns: repeat(6, 1fr); gap: 14px;
}
.logo-item {
  height: 72px; display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--line); border-radius: var(--radius);
  color: #98A6BA; font-weight: 600; font-size: 15px; letter-spacing: 1px;
  background: #fff; transition: color .2s, border-color .2s;
}
.logo-item:hover { color: var(--blue-500); border-color: var(--blue-400); }
.logo-item.placeholder { font-size: 12px; color: #AEB9C9; font-weight: 400; }

/* ============ 新闻 ============ */
.news-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.news-item {
  border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 22px 24px; background: #fff;
  transition: transform .2s, box-shadow .2s, border-color .2s;
  display: flex; flex-direction: column; min-height: 200px;
}
.news-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: var(--blue-400); }
.news-date { font-size: 12px; color: var(--text-400); font-family: var(--font-num); font-variant-numeric: tabular-nums; letter-spacing: 1px; }
.news-item h3 { font-size: 16px; margin: 10px 0 8px; }
.news-item p { font-size: 13.5px; color: var(--text-500); flex: 1; }
.news-item .news-more { margin-top: 14px; font-size: 13px; font-weight: 600; }

/* ============ CTA 条 ============ */
.cta-band { background: linear-gradient(120deg, var(--navy-800), var(--navy-600)); color: #fff; }
.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 30px; flex-wrap: wrap; }
.cta-inner h2 { color: #fff; font-size: 26px; margin-bottom: 8px; }
.cta-inner p { color: #B7C7DD; }

/* ============ 页脚 ============ */
.site-footer { background: var(--navy-950); color: #93A7C2; font-size: 14px; }
.footer-grid {
  max-width: var(--container); margin: 0 auto; padding: 56px 24px 36px;
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px;
}
.footer-grid h4 { color: #fff; font-size: 15px; margin-bottom: 16px; }
.footer-about p { color: #7E93B0; font-size: 13.5px; margin: 14px 0 18px; max-width: 300px; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { color: #93A7C2; transition: color .2s; padding: 3px 0; display: inline-block; }
.footer-links a:hover { color: #fff; }
.footer-contact a { padding: 3px 0; display: inline-block; }
.footer-contact li { margin-bottom: 12px; display: flex; gap: 8px; align-items: flex-start; color: #B7C7DD; }
.footer-contact svg { flex-shrink: 0; margin-top: 4px; }
.footer-contact a { color: #B7C7DD; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 18px 0;
}
.footer-bottom .container { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; font-size: 13px; color: #64799A; }

/* ============ 回到顶部 ============ */
.back-top {
  position: fixed; right: 26px; bottom: 26px; z-index: 90;
  width: 44px; height: 44px; border-radius: 6px;
  background: var(--navy-800); color: #fff; border: 1px solid rgba(120,160,215,.4);
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  opacity: 0; visibility: hidden; transform: translateY(10px);
  transition: opacity .25s, transform .25s, visibility .25s;
}
.back-top.show { opacity: 1; visibility: visible; transform: none; }
.back-top:hover { background: var(--blue-500); }

/* ============ 滚动揭示 ============ */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .product-card, .app-card, .news-item { transition: none; }
}

/* ============ Toast ============ */
.toast-wrap { position: fixed; top: 84px; left: 50%; transform: translateX(-50%); z-index: 300; display: flex; flex-direction: column; gap: 10px; width: min(92vw, 420px); }
.toast {
  background: var(--navy-900); color: #fff; border-radius: var(--radius);
  padding: 13px 18px; font-size: 14px; box-shadow: 0 10px 30px rgba(4,12,26,.4);
  display: flex; align-items: center; gap: 10px;
  border-left: 3px solid var(--blue-400);
  animation: toastIn .3s ease;
}
.toast.ok { border-left-color: #37B26C; }
.toast.err { border-left-color: #E0564F; }
@keyframes toastIn { from { opacity: 0; transform: translateY(-10px); } to { opacity: 1; transform: none; } }

/* ============ 页内通用（页头横幅） ============ */
.page-hero {
  background-color: var(--navy-900);
  background-image:
    linear-gradient(rgba(9,20,38,0.5), rgba(6,16,32,0.68)),
    url("../assets/img/bg-hero-mountain.jpg");
  background-size: cover;
  background-position: center 28%;
  color: #EAF0F8; padding: 74px 0 60px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.page-hero .crumb { font-size: 13px; color: #8FA3BF; margin-bottom: 14px; }
.page-hero .crumb a { color: #8FA3BF; }
.page-hero .crumb a:hover { color: #fff; }
.page-hero .crumb span { color: #C9D8EC; }
.page-hero h1 { color: #fff; font-size: 36px; margin-bottom: 12px; }
.page-hero p { color: #A9BCD6; max-width: 680px; font-size: 15px; }

/* ============ 筛选 ============ */
.filter-bar { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 30px; }
.filter-btn {
  padding: 8px 18px; border: 1px solid var(--steel-300); border-radius: 100px;
  background: #fff; color: var(--text-700); font-size: 14px; cursor: pointer;
  font-family: var(--font); transition: all .2s;
}
.filter-btn:hover { border-color: var(--blue-400); color: var(--blue-500); }
.filter-btn.active { background: var(--blue-500); border-color: var(--blue-500); color: #fff; }

/* ============ 产品详情页 ============ */
.detail-layout { display: grid; grid-template-columns: 1fr 1.15fr; gap: 40px; align-items: start; }
.detail-gallery { border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: hidden; }
.detail-gallery img { width: 100%; }
.detail-params-table { width: 100%; border-collapse: collapse; margin: 20px 0; table-layout: fixed; }
.detail-params-table th, .detail-params-table td { border: 1px solid var(--line); padding: 11px 14px; text-align: left; font-size: 14px; }
.detail-params-table th { width: 34%; background: var(--steel-50); color: var(--text-700); font-weight: 600; }
.detail-params-table td { color: var(--text-900); font-family: var(--font-num); font-variant-numeric: tabular-nums; }
.detail-aside { position: sticky; top: calc(var(--header-h) + 20px); }
.detail-aside .panel {
  border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 26px; background: #fff; margin-bottom: 20px;
}
.detail-aside .panel h3 { font-size: 16px; margin-bottom: 12px; }
.feature-list li { display: flex; gap: 10px; margin-bottom: 10px; font-size: 14px; color: var(--text-700); }
.feature-list svg { flex-shrink: 0; margin-top: 4px; color: var(--blue-500); }
.contact-mini { display: grid; gap: 8px; font-size: 14px; color: var(--text-700); }
.contact-mini a { color: var(--blue-500); }

/* ============ 时间轴（关于页） ============ */
.timeline { display: grid; grid-template-columns: 130px 46px 1fr; row-gap: 0; }
.tl-item { display: contents; }
.tl-time { padding: 22px 0; text-align: right; font-family: var(--font-num); font-weight: 700; font-size: 18px; color: var(--blue-500); font-variant-numeric: tabular-nums; }
.tl-axis { position: relative; }
.tl-axis::before { content: ""; position: absolute; left: 50%; top: 0; bottom: 0; width: 2px; background: var(--steel-300); transform: translateX(-50%); }
.tl-dot { position: absolute; top: 30px; left: 50%; transform: translate(-50%, -50%); width: 14px; height: 14px; border-radius: 50%; background: var(--blue-500); border: 3px solid #fff; box-shadow: 0 0 0 2px var(--blue-500); z-index: 1; }
.tl-content { padding: 20px 0 20px 4px; }
.tl-content h3 { font-size: 16px; margin-bottom: 4px; }
.tl-content p { font-size: 14px; color: var(--text-500); }

/* ============ 资质 / 荣誉 ============ */
.cert-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.cert-card {
  border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 26px 20px; text-align: center; background: #fff;
  transition: transform .2s, box-shadow .2s, border-color .2s;
}
.cert-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: var(--blue-400); }
.cert-card .cert-icon { width: 52px; height: 52px; margin: 0 auto 14px; color: var(--blue-500); }
.cert-card h3 { font-size: 16px; margin-bottom: 4px; }
.cert-card p { font-size: 13px; color: var(--text-500); }

/* ============ 表单 ============ */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-item { display: flex; flex-direction: column; gap: 6px; }
.form-item.full { grid-column: 1 / -1; }
.form-item label { font-size: 13.5px; font-weight: 600; color: var(--text-700); }
.form-item label em { color: #E0564F; font-style: normal; }
.form-item input, .form-item select, .form-item textarea {
  border: 1px solid var(--steel-300); border-radius: var(--radius);
  padding: 11px 14px; font-size: 14px; font-family: var(--font);
  color: var(--text-900); background: #fff; transition: border-color .2s, box-shadow .2s;
}
.form-item input:focus, .form-item select:focus, .form-item textarea:focus {
  outline: none; border-color: var(--blue-400); box-shadow: 0 0 0 3px rgba(61,127,240,.14);
}
.form-item textarea { resize: vertical; min-height: 120px; }
.form-item .hint { font-size: 12px; color: var(--text-400); }

/* ============ 客户专区 ============ */
.auth-wrap { max-width: 460px; margin: 0 auto; }
.auth-panel {
  border: 1px solid var(--line); border-radius: var(--radius-lg);
  background: #fff; padding: 38px 36px; box-shadow: var(--shadow-card);
}
.auth-panel h2 { text-align: center; font-size: 22px; margin-bottom: 6px; }
.auth-panel .auth-sub { text-align: center; color: var(--text-500); font-size: 14px; margin-bottom: 26px; }
.auth-note {
  margin-top: 18px; font-size: 12.5px; color: var(--text-400); text-align: center;
  background: var(--steel-50); border: 1px dashed var(--steel-300);
  border-radius: var(--radius); padding: 10px 14px;
}
.portal-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 26px; }
.portal-head .user-tag { color: var(--text-500); font-size: 14px; }
.download-list { border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: hidden; }
.dl-item {
  display: flex; align-items: center; gap: 16px;
  padding: 16px 20px; border-bottom: 1px solid var(--line);
  background: #fff; transition: background .15s;
}
.dl-item:last-child { border-bottom: 0; }
.dl-item:hover { background: var(--steel-50); }
.dl-icon { flex-shrink: 0; color: var(--blue-500); }
.dl-info { flex: 1; min-width: 0; }
.dl-info b { display: block; font-size: 14.5px; color: var(--text-900); }
.dl-info span { font-size: 12.5px; color: var(--text-400); }
.notice-list { display: grid; gap: 12px; }
.notice-item { border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 20px; background: #fff; display: flex; gap: 14px; align-items: flex-start; }
.notice-item .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--blue-400); margin-top: 8px; flex-shrink: 0; }
.notice-item b { display: block; font-size: 14.5px; }
.notice-item p { font-size: 13px; color: var(--text-500); margin-top: 2px; }
.notice-item time { font-size: 12px; color: var(--text-400); }

/* ============ 联系页信息卡 ============ */
.contact-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-bottom: 60px; }
.contact-card {
  border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 28px 26px; background: #fff; text-align: center;
  transition: transform .2s, box-shadow .2s, border-color .2s;
}
.contact-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: var(--blue-400); }
.contact-card svg { width: 34px; height: 34px; color: var(--blue-500); margin: 0 auto 14px; }
.contact-card h3 { font-size: 16px; margin-bottom: 6px; }
.contact-card p { font-size: 14px; color: var(--text-500); }
.contact-card a { color: var(--text-900); font-weight: 600; }

/* ============ 新闻弹窗 ============ */
.news-modal { position: fixed; inset: 0; z-index: 200; display: flex; align-items: center; justify-content: center; padding: 24px; }
.news-modal[hidden] { display: none; }
.news-modal-mask { position: absolute; inset: 0; background: rgba(6,15,31,.72); }
.news-modal-box { position: relative; width: min(660px, 100%); max-height: 82vh; overflow: auto; background: #fff; border-radius: var(--radius-lg); padding: 34px 36px; box-shadow: 0 24px 60px rgba(0,0,0,.4); }
.news-modal-close { position: absolute; top: 10px; right: 16px; font-size: 28px; line-height: 1; background: none; border: 0; color: var(--text-400); cursor: pointer; font-family: var(--font); }
.news-modal-close:hover { color: var(--text-900); }
.news-modal-date { font-size: 13px; color: var(--text-400); font-family: var(--font-num); letter-spacing: 1px; margin-bottom: 8px; }
.news-modal-box h2 { font-size: 22px; margin-bottom: 16px; }
.news-modal-body p { font-size: 14.5px; color: var(--text-700); margin-bottom: 14px; }
.news-item .news-more { margin-top: auto; padding: 0; border: 0; background: none; cursor: pointer; text-align: left; }

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
  .card-grid, .app-grid, .news-list { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 28px 16px; }
  .logo-wall { grid-template-columns: repeat(4, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .hero-inner { grid-template-columns: 1fr; padding-top: 72px; }
  .hero-figure { max-width: 560px; }
  .cert-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-cards { grid-template-columns: 1fr; max-width: 460px; margin-left: auto; margin-right: auto; }
  .detail-layout { grid-template-columns: 1fr; }
  .detail-aside { position: static; }
}

@media (max-width: 768px) {
  .menu-toggle { display: block; }
  .main-nav {
    position: absolute; top: var(--header-h); left: 0; right: 0;
    background: var(--navy-900); border-bottom: 1px solid rgba(255,255,255,.1);
    max-height: 0; overflow: hidden; transition: max-height .3s ease;
  }
  .main-nav.open { max-height: 420px; }
  .main-nav ul { flex-direction: column; align-items: stretch; padding: 12px 20px 20px; gap: 4px; }
  .main-nav a { padding: 12px 14px; }
  .nav-cta { margin-left: 0; text-align: center; }
  .section { padding: 56px 0; }
  .hero h1 { font-size: 32px; }
  .hero-stats { grid-template-columns: repeat(3, 1fr); gap: 8px; }
  .hero-stat .num { font-size: 24px; }
  .sec-head { flex-direction: column; align-items: flex-start; gap: 12px; }
  .sec-more { align-self: flex-start; }
  h2 { font-size: 25px; }
  .page-hero { padding: 52px 0 44px; }
  .page-hero h1 { font-size: 29px; }
  .form-grid { grid-template-columns: 1fr; }
  .timeline { grid-template-columns: 84px 34px 1fr; }
  .tl-time { font-size: 15px; }
  .logo-wall { grid-template-columns: repeat(3, 1fr); }
  .spec-tag.t1 { right: 0; }
  .spec-tag.t2 { left: 0; }
  .footer-grid { grid-template-columns: 1fr; }
  .stats-note { padding: 0 12px; }
}

@media (max-width: 640px) {
  .form-item input, .form-item select, .form-item textarea { font-size: 16px; }
}

@media (max-width: 520px) {
  .card-grid, .app-grid, .news-list { grid-template-columns: 1fr; }
  .hero-stats { grid-template-columns: 1fr 1fr; }
  .stat-item .num { font-size: 34px; }
  .cert-grid { grid-template-columns: 1fr; }
  .logo-wall { grid-template-columns: repeat(2, 1fr); }
  .hero-actions .btn { width: 100%; }
  .detail-params-table { font-size: 13px; }
  .detail-params-table th, .detail-params-table td { padding: 9px 10px; }
}


/* ============================================================
   2026-10 真实素材版：视频主视觉 / 结构卡片 / 信息图 / 证书
   ============================================================ */

/* Hero 右侧产品视频（容器裁掉底部水印带） */
.hero-figure .hero-video {
  position: relative;
  border: 1px solid rgba(110,150,205,.35);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #000;
  aspect-ratio: 1280 / 628;
  box-shadow: 0 24px 60px rgba(3,10,22,.55);
}
.hero-figure .hero-video video {
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 128%;            /* 放大后底部约 12.8% 水印被容器裁掉 */
  object-fit: cover;
  display: block;
}

/* 四种内部结构卡片 */
.struct-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-bottom: 34px; }
.struct-card {
  position: relative;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 24px 22px 22px;
  transition: transform .2s, box-shadow .2s, border-color .2s;
}
.struct-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: var(--blue-400); }
.struct-index {
  font-family: var(--font-num); font-size: 13px; font-weight: 700;
  letter-spacing: 2px; color: var(--blue-500); margin-bottom: 12px;
}
.struct-card h3 { font-size: 16.5px; margin-bottom: 10px; }
.struct-card p { font-size: 13.5px; color: var(--text-500); line-height: 1.7; margin-bottom: 14px; }
.struct-good {
  border-top: 1px dashed var(--steel-300); padding-top: 12px;
  font-size: 13px; color: var(--text-700); line-height: 1.7;
}
.struct-good b { display: block; color: var(--blue-500); font-size: 12.5px; margin-bottom: 4px; letter-spacing: 1px; }

/* 信息图 / 合作伙伴整图 */
.info-figure {
  border: 1px solid var(--line); border-radius: var(--radius-lg);
  overflow: hidden; background: #fff; max-width: 920px; margin: 0 auto;
}
.info-figure img { display: block; width: 100%; height: auto; }
.info-figure figcaption { padding: 12px 18px; font-size: 13px; color: var(--text-400); text-align: center; }
.info-figure.partners { max-width: 1060px; }

/* 产品详情缩略图 */
.detail-thumbs { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-top: 12px; }
.detail-thumb {
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 0; overflow: hidden; cursor: pointer; background: #fff; aspect-ratio: 4 / 3;
}
.detail-thumb img { width: 100%; height: 100%; object-fit: cover; opacity: .72; transition: opacity .2s; }
.detail-thumb:hover img, .detail-thumb.active img { opacity: 1; }
.detail-thumb.active { border-color: var(--blue-500); box-shadow: 0 0 0 2px rgba(61,127,240,.18); }

/* 关于页：真实证书图 */
.cert-photo-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; max-width: 900px; margin: 0 auto; }
.cert-photo {
  border: 1px solid var(--line); border-radius: var(--radius-lg);
  overflow: hidden; background: #fff; padding: 14px;
}
.cert-photo img { display: block; width: 100%; height: auto; border: 1px solid var(--line); }
.cert-photo figcaption { padding: 10px 4px 2px; font-size: 13px; color: var(--text-500); text-align: center; }
.cert-photo-wide { grid-column: 1 / -1; max-width: 720px; margin: 0 auto; }
.cert-note { font-size: 12.5px; color: var(--text-400); text-align: center; margin-top: 18px; }

/* 关于页：工厂六图 */
.factory-grid.six { grid-template-columns: repeat(3, 1fr); }

/* 响应式补充 */
@media (max-width: 1024px) {
  .struct-grid { grid-template-columns: repeat(2, 1fr); }
  .factory-grid.six { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .struct-grid { grid-template-columns: 1fr; }
  .factory-grid.six { grid-template-columns: 1fr; }
  .cert-photo-grid { grid-template-columns: 1fr; }
  .detail-thumbs { grid-template-columns: repeat(3, 1fr); }
  .hero-figure .hero-video { aspect-ratio: 16 / 10; }
}

@media (max-width:768px){ .factory-grid.six{grid-template-columns:repeat(2,1fr) !important} }
@media (max-width:520px){ .factory-grid.six{grid-template-columns:1fr !important} }

@media (max-width:640px){ .product-card .card-foot a{ min-height:44px; display:inline-flex; align-items:center } .menu-toggle{ min-width:44px; min-height:44px } }

/* ============================================================
   开屏动画 / 滑动动效增强
   设计语言参照 DJI Careers（影像 + 巨型横排字）与
   Moonshot AI Careers（深色科技 + 滑动开启探索）
   ============================================================ */

/* ---------- 开屏 Preloader ---------- */
body.lzj-loading { overflow: hidden; }
#lzj-preloader {
  position: fixed; inset: 0; z-index: 9999;
  background-color: #081226;
  background-image:
    linear-gradient(rgba(6,14,28,.5), rgba(4,10,22,.7)),
    url("../assets/img/bg-splash-city.jpg");
  background-size: cover;
  background-position: center center;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
  transition: transform .95s cubic-bezier(.76, 0, .24, 1);
  will-change: transform;
}
#lzj-preloader.done { transform: translateY(-100%); }
#lzj-preloader .pl-inner {
  position: relative; z-index: 2;
  display: flex; flex-direction: column; align-items: center;
  transition: opacity .45s ease, transform .45s ease;
}
#lzj-preloader.done .pl-inner { opacity: 0; transform: translateY(-26px); }
#lzj-preloader .pl-grid {
  position: absolute; inset: -2px;
  background-image:
    linear-gradient(rgba(96,140,214,.10) 1px, transparent 1px),
    linear-gradient(90deg, rgba(96,140,214,.10) 1px, transparent 1px);
  background-size: 46px 46px;
  -webkit-mask-image: radial-gradient(circle at 50% 42%, #000 18%, transparent 72%);
          mask-image: radial-gradient(circle at 50% 42%, #000 18%, transparent 72%);
}
#lzj-preloader .pl-sweep {
  position: absolute; top: 0; bottom: 0; width: 38%;
  background: linear-gradient(100deg, transparent, rgba(93,150,255,.10), transparent);
  animation: plSweep 2.1s ease-in-out infinite;
}
@keyframes plSweep { 0% { left: -45%; } 100% { left: 110%; } }
.pl-ring { position: relative; width: 118px; height: 118px; margin-bottom: 26px; }
.pl-ring svg { position: absolute; inset: 0; width: 100%; height: 100%; }
.pl-ticks { fill: none; stroke: rgba(180,205,245,.35); stroke-width: 1.4; stroke-dasharray: 1 7; }
.pl-arc {
  fill: none; stroke: #3D7FF0; stroke-width: 3; stroke-linecap: round;
  stroke-dasharray: 86 253;
  transform-origin: center;
  animation: plSpin 1.7s linear infinite;
  filter: drop-shadow(0 0 6px rgba(61,127,240,.8));
}
@keyframes plSpin { to { transform: rotate(360deg); } }
.pl-logo {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  animation: plPulse 2s ease-in-out infinite;
}
.pl-logo svg { width: 46px; height: 46px; }
@keyframes plPulse {
  0%, 100% { filter: drop-shadow(0 0 5px rgba(61,127,240,.45)); }
  50%      { filter: drop-shadow(0 0 20px rgba(96,160,255,.95)); }
}
.pl-cn {
  color: #fff; font-size: 23px; font-weight: 700; letter-spacing: 6px;
  text-indent: 6px;
  animation: plFadeUp .8s cubic-bezier(.22,.61,.36,1) .18s both;
}
.pl-en {
  margin-top: 9px; color: #7E97BE; font-size: 11px; font-weight: 600;
  letter-spacing: 4.5px; text-indent: 4.5px;
  animation: plFadeUp .8s cubic-bezier(.22,.61,.36,1) .4s both;
}
.pl-bar {
  width: 232px; height: 2px; margin-top: 32px;
  background: rgba(255,255,255,.12); position: relative; overflow: hidden;
  animation: plFadeUp .8s ease .55s both;
}
.pl-bar i {
  position: absolute; inset: 0; width: 0%;
  background: linear-gradient(90deg, #2E5FC0, #5B9CFF);
  box-shadow: 0 0 10px rgba(91,156,255,.8);
}
.pl-pct {
  margin-top: 12px; font-family: var(--font-num, inherit);
  font-size: 12px; color: #8FA8D2; letter-spacing: 2px;
  animation: plFadeUp .8s ease .55s both;
}
.pl-sub {
  margin-top: 20px; color: #58709B; font-size: 11px; letter-spacing: 2px;
  animation: plFadeUp .8s ease .7s both;
}
@keyframes plFadeUp { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: none; } }

/* ---------- 首页英雄区入场 ---------- */
@keyframes lzjHeroRise { from { opacity: 0; transform: translateY(36px); } to { opacity: 1; transform: none; } }
.hero-badge, .hero h1, .hero-sub, .hero-actions, .hero-stats, .hero-figure {
  animation: lzjHeroRise .95s cubic-bezier(.22,.61,.36,1) both;
}
.hero-badge { animation-delay: .05s; }
.hero h1 { animation-delay: .15s; }
.hero-sub { animation-delay: .28s; }
.hero-actions { animation-delay: .4s; }
.hero-stats { animation-delay: .52s; }
.hero-figure { animation-delay: .24s; }
.page-hero h1 { animation: lzjHeroRise .8s cubic-bezier(.22,.61,.36,1) both; }
.page-hero .crumb, .page-hero p { animation: plFadeUp .8s ease .12s both; }

/* ---------- “滑动开启探索”提示 ---------- */
.scroll-hint {
  position: absolute; left: 50%; bottom: 22px; transform: translateX(-50%);
  z-index: 3; color: #8FA3C2; font-size: 11px; letter-spacing: 4px;
  text-align: center; text-indent: 4px; pointer-events: none;
}
.scroll-hint .mouse {
  display: block; width: 21px; height: 33px; margin: 0 auto 9px;
  border: 1.5px solid rgba(255,255,255,.45); border-radius: 12px; position: relative;
}
.scroll-hint .mouse::after {
  content: ""; position: absolute; left: 50%; top: 6px;
  width: 3px; height: 7px; border-radius: 2px; background: #fff;
  animation: wheelDot 1.7s ease-in-out infinite;
}
@keyframes wheelDot {
  0%   { opacity: 0; transform: translateX(-50%) translateY(0); }
  35%  { opacity: 1; }
  100% { opacity: 0; transform: translateX(-50%) translateY(13px); }
}

/* ---------- 金属大字无限横滑带 ---------- */
.lzj-marquee {
  background: linear-gradient(180deg, #0A1730 0%, #081227 100%);
  border-top: 1px solid rgba(255,255,255,.07);
  border-bottom: 1px solid rgba(255,255,255,.07);
  overflow: hidden; padding: 30px 0;
}
.lzj-marquee + .lzj-marquee { border-top: 0; padding-top: 0; padding-bottom: 32px; }
.mq-track { display: flex; width: max-content; animation: mqScroll 30s linear infinite; }
.mq-track.rev { animation: mqScrollRev 38s linear infinite; }
.mq-track span {
  display: inline-flex; align-items: center; white-space: nowrap;
  font-size: 42px; font-weight: 800; line-height: 1.1; color: #fff;
  letter-spacing: 2px; padding: 0 22px;
}
.mq-track span::after {
  content: ""; width: 9px; height: 9px; margin-left: 44px;
  background: #3D7FF0; transform: rotate(45deg); flex: none;
}
.mq-track.ghost span { color: transparent; -webkit-text-stroke: 1px rgba(190,208,240,.42); }
.mq-track.ghost span::after { background: transparent; border: 1.5px solid rgba(120,155,220,.55); }
@keyframes mqScroll { from { transform: translateX(0); } to { transform: translateX(-50%); } }
@keyframes mqScrollRev { from { transform: translateX(-50%); } to { transform: translateX(0); } }

/* ---------- 卡片错峰滑入（不影响 hover 手感） ---------- */
@media (prefers-reduced-motion: no-preference) {
  .card-grid .product-card:nth-child(3n+2):not(:hover) { transition-delay: .09s; }
  .card-grid .product-card:nth-child(3n+3):not(:hover) { transition-delay: .18s; }
  .app-grid .app-card:nth-child(2n):not(:hover) { transition-delay: .1s; }
  .app-grid .app-card:nth-child(3n):not(:hover) { transition-delay: .18s; }
  .struct-grid .struct-card:nth-child(2n):not(:hover) { transition-delay: .1s; }
  .struct-grid .struct-card:nth-child(3n):not(:hover) { transition-delay: .18s; }
  .factory-grid figure:nth-child(2n):not(:hover) { transition-delay: .08s; }
  .factory-grid figure:nth-child(3n):not(:hover) { transition-delay: .16s; }
  .cert-photo-grid .cert-photo:nth-child(2n):not(:hover) { transition-delay: .12s; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 768px) {
  .scroll-hint { display: none; }
  .mq-track span { font-size: 28px; padding: 0 16px; }
  .mq-track span::after { margin-left: 28px; width: 7px; height: 7px; }
  .lzj-marquee { padding: 22px 0; }
  .pl-cn { font-size: 20px; letter-spacing: 5px; }
}
@media (prefers-reduced-motion: reduce) {
  #lzj-preloader { display: none !important; }
  .mq-track, .mq-track.rev { animation: none; }
  .hero-badge, .hero h1, .hero-sub, .hero-actions, .hero-stats, .hero-figure,
  .page-hero h1, .page-hero .crumb, .page-hero p { animation: none !important; }
}


/* ============================================================
   视频借鉴增强
   A. 精密金属光点粒子系统 —— 借鉴视频① Optimistic Web 纯CSS雪花
      （radial-gradient 粒子 + @property 自定义属性驱动 + 伪元素倍增 + 风效摆动）
   B. 缩放淡入入场 + 按钮光效 —— 借鉴视频② 技术小白 响应式站
      （@keyframes scale+opacity 入场、胶囊按钮 hover）
   ============================================================ */

/* ---------- A1. 粒子系统：注册可插值自定义属性 ---------- */
@property --lzj-y { syntax: "<percentage>"; inherits: false; initial-value: -14%; }
@property --lzj-x { syntax: "<percentage>"; inherits: false; initial-value: 0%; }

/* A2. 粒子层本体：三层径向渐变 = 三层"金属光点"，错位排布 */
.lzj-particles {
  position: absolute; inset: 0; overflow: hidden;
  pointer-events: none; z-index: 1;
  background-image:
    radial-gradient(circle at calc(50% + var(--lzj-x)) var(--lzj-y), rgba(160,198,255,.95) 0 1.6px, rgba(160,198,255,0) 3.2px),
    radial-gradient(circle at calc(76% + var(--lzj-x)) calc(var(--lzj-y) + 18%), rgba(110,165,255,.8) 0 1.1px, rgba(110,165,255,0) 2.3px),
    radial-gradient(circle at calc(24% - var(--lzj-x)) calc(var(--lzj-y) + 36%), rgba(205,226,255,.7) 0 .9px, rgba(205,226,255,0) 1.9px);
  background-size: 62% auto, 52% auto, 38% auto;
  animation: lzjFall 12s linear infinite, lzjWind 5.8s ease-in-out infinite;
  will-change: background-position;
}
.lzj-particles::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    radial-gradient(circle at calc(38% - var(--lzj-x)) var(--lzj-y), rgba(140,182,255,.85) 0 1.3px, rgba(140,182,255,0) 2.6px),
    radial-gradient(circle at calc(88% + var(--lzj-x)) calc(var(--lzj-y) + 10%), rgba(92,152,255,.7) 0 1px, rgba(92,152,255,0) 2.1px);
  background-size: 46% auto, 32% auto;
  animation: lzjFall 9.5s linear infinite;
}
.lzj-particles::after {
  content: ""; position: absolute; inset: 0;
  background-image:
    radial-gradient(circle at calc(62% + var(--lzj-x)) var(--lzj-y), rgba(192,216,255,.9) 0 1.7px, rgba(192,216,255,0) 3.4px),
    radial-gradient(circle at calc(12% + var(--lzj-x)) calc(var(--lzj-y) + 24%), rgba(122,172,255,.72) 0 1px, rgba(122,172,255,0) 2px);
  background-size: 56% auto, 42% auto;
  animation: lzjFall 15s linear infinite, lzjWind 7.2s ease-in-out infinite reverse;
}
@keyframes lzjFall { from { --lzj-y: -14%; } to { --lzj-y: 112%; } }
@keyframes lzjWind { 0%, 100% { --lzj-x: -4%; } 50% { --lzj-x: 4%; } }

/* A3. 开屏 Preloader 粒子（低透明，置于网格层之下） */
#lzj-preloader .pl-particles { z-index: 0; opacity: .75; }

/* A4. 首页 Hero 粒子层定位 */
.hero > .lzj-particles { z-index: 1; }
.hero-inner { position: relative; z-index: 2; }

/* ---------- B1. 缩放淡入入场（借鉴视频② skyfrom：scale+opacity 入场） ---------- */
.reveal-pop {
  opacity: 0; transform: scale(.86);
  transition: opacity .7s cubic-bezier(.22,.61,.36,1), transform .7s cubic-bezier(.22,.61,.36,1);
}
.reveal-pop.in { opacity: 1; transform: scale(1); }

/* ---------- B2. 按钮胶囊光效（借鉴视频② 黑色胶囊按钮 hover） ---------- */
.btn { transition: transform .25s ease, box-shadow .25s ease, background-color .25s ease, color .25s ease, border-color .25s ease; }
.btn:hover { transform: translateY(-2px) scale(1.02); box-shadow: 0 12px 26px rgba(14,34,74,.18); }
.btn-primary:hover { box-shadow: 0 12px 28px rgba(61,127,240,.38); }
.btn-outline-light:hover { box-shadow: 0 10px 24px rgba(91,156,255,.22); }

/* ---------- B3. 移动端降载：只保留主层粒子 ---------- */
@media (max-width: 640px) {
  .lzj-particles::before, .lzj-particles::after { display: none; }
}

/* ---------- B4. 减少动态效果：关闭粒子与缩放入场 ---------- */
@media (prefers-reduced-motion: reduce) {
  .lzj-particles, .lzj-particles::before, .lzj-particles::after { animation: none !important; opacity: .35; }
  .reveal-pop { opacity: 1; transform: none; transition: none; }
  .btn, .btn:hover { transition: none; transform: none; box-shadow: none; }
}


/* ============================================================
   视频借鉴增强 · 第二波
   C. 粒子加量（每层增加光点，新增更多层）
   D. 星座连线粒子（Canvas 星点漂移 + 近距连线 + 闪烁）
   E. 白色/浅色区域科技填充（淡网格 / 角标 / 眉标刻度 / 标题渐变线）
   F. 开屏动画强化（外框 + 四角刻度 + 进度前沿光点）
   ============================================================ */

/* ---------- C. 粒子加量：更多光点层 ---------- */
.lzj-particles {
  background-image:
    radial-gradient(circle at calc(12% + var(--lzj-x)) var(--lzj-y), rgba(170,205,255,.9) 0 1.4px, rgba(170,205,255,0) 2.8px),
    radial-gradient(circle at calc(50% + var(--lzj-x)) var(--lzj-y), rgba(160,198,255,.95) 0 1.6px, rgba(160,198,255,0) 3.2px),
    radial-gradient(circle at calc(76% + var(--lzj-x)) calc(var(--lzj-y) + 18%), rgba(110,165,255,.8) 0 1.1px, rgba(110,165,255,0) 2.3px),
    radial-gradient(circle at calc(24% - var(--lzj-x)) calc(var(--lzj-y) + 36%), rgba(205,226,255,.7) 0 .9px, rgba(205,226,255,0) 1.9px),
    radial-gradient(circle at calc(64% - var(--lzj-x)) calc(var(--lzj-y) + 8%), rgba(120,172,255,.65) 0 1.2px, rgba(120,172,255,0) 2.4px),
    radial-gradient(circle at calc(42% + var(--lzj-x)) calc(var(--lzj-y) + 26%), rgba(150,195,255,.55) 0 .8px, rgba(150,195,255,0) 1.7px);
  background-size: 62% auto, 62% auto, 52% auto, 38% auto, 44% auto, 30% auto;
}
.lzj-particles::before {
  background-image:
    radial-gradient(circle at calc(8% + var(--lzj-x)) var(--lzj-y), rgba(150,190,255,.8) 0 1.1px, rgba(150,190,255,0) 2.2px),
    radial-gradient(circle at calc(38% - var(--lzj-x)) var(--lzj-y), rgba(140,182,255,.85) 0 1.3px, rgba(140,182,255,0) 2.6px),
    radial-gradient(circle at calc(58% + var(--lzj-x)) calc(var(--lzj-y) + 12%), rgba(96,156,255,.7) 0 1px, rgba(96,156,255,0) 2px),
    radial-gradient(circle at calc(88% + var(--lzj-x)) calc(var(--lzj-y) + 10%), rgba(92,152,255,.7) 0 1px, rgba(92,152,255,0) 2.1px),
    radial-gradient(circle at calc(70% - var(--lzj-x)) calc(var(--lzj-y) + 30%), rgba(180,210,255,.55) 0 .8px, rgba(180,210,255,0) 1.7px);
  background-size: 46% auto, 46% auto, 32% auto, 32% auto, 26% auto;
}
.lzj-particles::after {
  background-image:
    radial-gradient(circle at calc(30% + var(--lzj-x)) var(--lzj-y), rgba(200,222,255,.85) 0 1.4px, rgba(200,222,255,0) 2.8px),
    radial-gradient(circle at calc(62% + var(--lzj-x)) var(--lzj-y), rgba(192,216,255,.9) 0 1.7px, rgba(192,216,255,0) 3.4px),
    radial-gradient(circle at calc(86% - var(--lzj-x)) calc(var(--lzj-y) + 18%), rgba(132,180,255,.7) 0 1.1px, rgba(132,180,255,0) 2.2px),
    radial-gradient(circle at calc(12% + var(--lzj-x)) calc(var(--lzj-y) + 24%), rgba(122,172,255,.72) 0 1px, rgba(122,172,255,0) 2px),
    radial-gradient(circle at calc(48% - var(--lzj-x)) calc(var(--lzj-y) + 6%), rgba(160,200,255,.6) 0 1px, rgba(160,200,255,0) 2px);
  background-size: 56% auto, 56% auto, 42% auto, 42% auto, 30% auto;
}

/* ---------- D. 星座连线粒子层 ---------- */
.lzj-constellation {
  position: absolute; inset: 0; overflow: hidden;
  pointer-events: none; z-index: 1;
}
.lzj-constellation canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.hero > .lzj-constellation { z-index: 1; }
#lzj-preloader .pl-constellation { z-index: 1; }

/* ---------- E. 白色/浅色区域科技填充 ---------- */
/* 全站浅色区极淡科技网格（深色区块自带背景会盖住） */
main {
  background-image:
    linear-gradient(rgba(38,94,178,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(38,94,178,.045) 1px, transparent 1px);
  background-size: 36px 36px;
}
/* 钢色区：淡网格 + 左上角刻度 */
.section-steel { position: relative; }
.section-steel::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(38,94,178,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(38,94,178,.06) 1px, transparent 1px);
  background-size: 44px 44px;
}
.section-steel::after {
  content: ""; position: absolute; left: 0; top: 0; pointer-events: none;
  width: 46px; height: 46px;
  border-top: 1px solid rgba(61,127,240,.45);
  border-left: 1px solid rgba(61,127,240,.45);
}
/* 眉标右端科技刻度（与左横线呼应） */
.sec-eyebrow::after {
  content: ""; width: 9px; height: 9px;
  border: 1.5px solid currentColor; border-left: 0; opacity: .9;
}
.section-dark .sec-eyebrow::after, .section-steel .sec-eyebrow::after { border-color: currentColor; }
/* 标题下渐变科技短线 */
.sec-title { position: relative; }
.sec-title::after {
  content: ""; position: absolute; left: 0; bottom: -6px;
  width: 54px; height: 3px; border-radius: 2px;
  background: linear-gradient(90deg, var(--blue-500), rgba(61,127,240,0));
}

/* ---------- F. 开屏动画强化 ---------- */
/* 外层细框 */
#lzj-preloader::before {
  content: ""; position: absolute; inset: 16px; pointer-events: none;
  border: 1px solid rgba(96,140,214,.18);
}
/* 四角刻度 */
#lzj-preloader::after {
  content: ""; position: absolute; inset: 10px; pointer-events: none; opacity: .55;
  background:
    linear-gradient(#3D7FF0, #3D7FF0) left 0 top 0 / 24px 1.5px no-repeat,
    linear-gradient(#3D7FF0, #3D7FF0) left 0 top 0 / 1.5px 24px no-repeat,
    linear-gradient(#3D7FF0, #3D7FF0) right 0 top 0 / 24px 1.5px no-repeat,
    linear-gradient(#3D7FF0, #3D7FF0) right 0 top 0 / 1.5px 24px no-repeat,
    linear-gradient(#3D7FF0, #3D7FF0) left 0 bottom 0 / 24px 1.5px no-repeat,
    linear-gradient(#3D7FF0, #3D7FF0) left 0 bottom 0 / 1.5px 24px no-repeat,
    linear-gradient(#3D7FF0, #3D7FF0) right 0 bottom 0 / 24px 1.5px no-repeat,
    linear-gradient(#3D7FF0, #3D7FF0) right 0 bottom 0 / 1.5px 24px no-repeat;
}
/* 进度条前沿光点 */
.pl-bar i::after {
  content: ""; position: absolute; right: 0; top: -2px;
  width: 2px; height: 6px; border-radius: 1px;
  background: #9CC4FF; box-shadow: 0 0 9px rgba(120,170,255,.95);
}
/* 减少动态效果补充 */
@media (prefers-reduced-motion: reduce) {
  .lzj-constellation canvas { display: none; }
  .sec-title::after, .sec-eyebrow::after { display: none; }
}