/* ============================================================
   FENGRUI ROTARY UNION — Design System (Design Draft v1.0)
   科技工业风 / Industrial-Tech B2B Style
   Performance-first: 单文件、无重框架、语义化、移动优先
   ============================================================ */

/* ---------- 1. Design Tokens ---------- */
:root {
  /* 品牌色系：深海工业蓝 */
  --navy-950: #0b2140;
  --navy-900: #0f2e5c;
  --navy-800: #163e78;
  --navy-700: #1e5094;
  --navy-600: #2863b0;
  --blue-600: #1a68d0;
  --blue-500: #2e7beb;
  --blue-soft: #e9f2fd;
  /* CTA 强调色：工程橙 */
  --accent: #ff7a00;
  --accent-600: #f26a00;
  --accent-soft: #fff1e4;
  /* 中性色 */
  --ink: #13233d;
  --text: #3a4a63;
  --muted: #6b7a93;
  --line: #e4eaf3;
  --bg-soft: #f5f8fc;
  --green: #159a4e;
  /* 形状与阴影 */
  --radius: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 3px rgba(8, 26, 54, .08);
  --shadow-md: 0 8px 24px rgba(8, 26, 54, .10);
  --shadow-lg: 0 20px 48px rgba(8, 26, 54, .16);
  --font: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Arial, sans-serif;
  --container: 1200px;
  --header-h: 64px;
}

/* ---------- 2. Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  color: var(--text);
  background: #fff;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--blue-600); text-decoration: none; transition: color .2s; }
a:hover { color: var(--accent-600); }
ul, ol { list-style: none; }
h1, h2, h3, h4 { color: var(--ink); line-height: 1.25; font-weight: 700; }
h1 { font-size: clamp(1.9rem, 3.6vw, 2.9rem); font-weight: 800; letter-spacing: -.02em; }
h2 { font-size: clamp(1.5rem, 2.6vw, 2.15rem); font-weight: 800; letter-spacing: -.015em; }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1em; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

/* ---------- 3. Layout Utilities ---------- */
.container { max-width: var(--container); margin-inline: auto; padding-inline: 20px; }
.section { padding: 76px 0; }
.section--soft { background: var(--bg-soft); }
.section--dark {
  background: linear-gradient(150deg, var(--navy-950) 0%, var(--navy-800) 60%, var(--navy-700) 100%);
  color: #c9d6ea;
}
.section--dark h2, .section--dark h3 { color: #fff; }
.section-head { max-width: 720px; margin: 0 auto 46px; text-align: center; }
.section-head--left { margin-left: 0; text-align: left; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: .78rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase;
  color: var(--accent-600); margin-bottom: 12px;
}
.eyebrow::before { content: ""; width: 26px; height: 2px; background: var(--accent); border-radius: 2px; }
.section-head--center .eyebrow::after { content: ""; width: 26px; height: 2px; background: var(--accent); border-radius: 2px; }
.section-head p { color: var(--muted); font-size: 1.02rem; margin: 14px 0 0; }
.section--dark .section-head p { color: #9fb2cf; }

/* ---------- 4. Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 26px; border-radius: var(--radius-sm);
  font-weight: 600; font-size: .95rem; line-height: 1.2;
  border: 2px solid transparent; cursor: pointer;
  transition: transform .15s, box-shadow .2s, background .2s, color .2s, border-color .2s;
}
.btn:active { transform: translateY(1px); }
.btn--accent { background: var(--accent); color: #fff; box-shadow: 0 6px 18px rgba(255, 122, 0, .35); }
.btn--accent:hover { background: var(--accent-600); color: #fff; box-shadow: 0 8px 24px rgba(255, 122, 0, .45); }
.btn--navy { background: var(--navy-800); color: #fff; }
.btn--navy:hover { background: var(--navy-700); color: #fff; }
.btn--ghost { border-color: rgba(255, 255, 255, .45); color: #fff; background: transparent; }
.btn--ghost:hover { border-color: #fff; color: #fff; background: rgba(255, 255, 255, .08); }
.btn--line { border-color: var(--line); color: var(--ink); background: #fff; }
.btn--line:hover { border-color: var(--blue-600); color: var(--blue-600); }
.btn--lg { padding: 16px 34px; font-size: 1.02rem; }
.btn--sm { padding: 8px 16px; font-size: .85rem; }

/* ---------- 5. Topbar ---------- */
.topbar { background: var(--navy-950); color: #aebdd6; font-size: .83rem; }
.topbar__inner { display: flex; align-items: center; justify-content: space-between; min-height: 40px; gap: 16px; }
.topbar a { color: #cbd8ec; }
.topbar a:hover { color: #fff; }
.topbar__links { display: flex; align-items: center; gap: 22px; flex-wrap: wrap; }
.topbar__links li { display: inline-flex; align-items: center; gap: 7px; }
.topbar__links svg { width: 14px; height: 14px; stroke: var(--accent); }
.topbar__lang { display: inline-flex; align-items: center; gap: 6px; }
.topbar__lang svg { width: 14px; height: 14px; stroke: #aebdd6; }
.topbar__lang b { color: #fff; font-weight: 600; }

/* ---------- 6. Header & Nav ---------- */
.header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, .96); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
  transition: box-shadow .25s;
}
.header.is-stuck { box-shadow: var(--shadow-md); }
.header__inner { display: flex; align-items: center; justify-content: space-between; min-height: var(--header-h); gap: 20px; }
.logo { display: inline-flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo img { height: 46px; width: auto; }
.logo__name { font-size: 1.02rem; font-weight: 800; color: var(--ink); line-height: 1.15; letter-spacing: .01em; }
.logo__name small { display: block; font-size: .66rem; font-weight: 600; letter-spacing: .22em; text-transform: uppercase; color: var(--accent-600); }
.nav { display: flex; align-items: center; gap: 4px; }
.nav__list { display: flex; align-items: center; gap: 2px; }
.nav__link {
  position: relative; display: inline-flex; align-items: center; gap: 5px;
  padding: 10px 14px; font-weight: 600; font-size: .93rem; color: var(--ink);
  border-radius: var(--radius-sm); white-space: nowrap;
}
.nav__link:hover { color: var(--blue-600); background: var(--blue-soft); }
.nav__link[aria-current="page"] { color: var(--blue-600); }
.nav__link[aria-current="page"]::after {
  content: ""; position: absolute; left: 14px; right: 14px; bottom: 2px; height: 3px;
  background: var(--accent); border-radius: 3px 3px 0 0;
}
.nav__drop { position: relative; }
.nav__drop-menu {
  position: absolute; top: calc(100% + 10px); left: 0; min-width: 300px;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow-lg); padding: 10px;
  opacity: 0; visibility: hidden; transform: translateY(8px);
  transition: opacity .18s, transform .18s, visibility .18s;
}
.nav__drop:hover .nav__drop-menu, .nav__drop:focus-within .nav__drop-menu,
.nav__drop.open .nav__drop-menu { opacity: 1; visibility: visible; transform: translateY(0); }
.nav__drop-menu a {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding: 10px 12px; border-radius: var(--radius-sm); font-weight: 500; font-size: .9rem; color: var(--text);
}
.nav__drop-menu a:hover { background: var(--blue-soft); color: var(--blue-600); }
.nav__drop-menu a small { color: var(--muted); font-size: .78rem; }
.header__cta { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.nav-toggle {
  display: none; width: 44px; height: 44px; border: 1px solid var(--line);
  background: #fff; border-radius: var(--radius-sm); cursor: pointer;
  align-items: center; justify-content: center;
}
.nav-toggle svg { width: 22px; height: 22px; stroke: var(--ink); }

/* 移动端导航面板 */
.mobile-nav {
  display: none; position: fixed; inset: 0; z-index: 99; background: rgba(5, 15, 34, .5);
}
.mobile-nav__panel {
  position: absolute; top: 0; right: 0; bottom: 0; width: min(340px, 86vw);
  background: #fff; padding: 24px 20px 40px; overflow-y: auto;
  transform: translateX(100%); transition: transform .28s ease;
  box-shadow: var(--shadow-lg);
}
.mobile-nav.open { display: block; }
.mobile-nav.open .mobile-nav__panel { transform: translateX(0); }
.mobile-nav__head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; }
.mobile-nav__close { width: 40px; height: 40px; border: 1px solid var(--line); border-radius: var(--radius-sm); background: #fff; cursor: pointer; }
.mobile-nav__close svg { width: 18px; height: 18px; stroke: var(--ink); }
.mobile-nav a.mnav { display: block; padding: 13px 6px; font-weight: 600; color: var(--ink); border-bottom: 1px solid var(--line); }
.mobile-nav a.mnav:hover { color: var(--blue-600); }
.mobile-nav .mnav-sub { padding: 8px 6px 8px 18px; display: block; color: var(--muted); font-size: .92rem; border-bottom: 1px dashed var(--line); }
.mobile-nav__cta { margin-top: 22px; display: flex; flex-direction: column; gap: 10px; }

/* ---------- 7. Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background:
    radial-gradient(900px 480px at 85% -10%, rgba(46, 123, 235, .40), transparent 60%),
    linear-gradient(150deg, var(--navy-950) 0%, var(--navy-900) 45%, var(--navy-800) 100%);
  color: #c9d6ea;
}
.hero__grid {
  position: absolute; inset: 0; opacity: .32; pointer-events: none;
  background-image:
    linear-gradient(rgba(120, 160, 220, .10) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120, 160, 220, .10) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse at 60% 40%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at 60% 40%, #000 30%, transparent 75%);
}
.hero__inner {
  position: relative; display: grid; grid-template-columns: 1.05fr .95fr;
  align-items: center; gap: 48px; padding: 84px 20px 110px;
  max-width: var(--container); margin-inline: auto;
}
.hero__chip {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 14px; border: 1px solid rgba(255, 255, 255, .22);
  border-radius: 999px; font-size: .8rem; font-weight: 600; color: #dfe9f8;
  background: rgba(255, 255, 255, .06); margin-bottom: 20px;
}
.hero__chip svg { width: 14px; height: 14px; stroke: var(--accent); }
.hero h1 { color: #fff; margin-bottom: 18px; }
.hero h1 .hl { color: var(--accent); }
.hero__sub { font-size: 1.08rem; color: #b6c6de; max-width: 560px; margin-bottom: 28px; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 30px; }
.hero__trust { display: flex; flex-wrap: wrap; gap: 18px; font-size: .87rem; color: #a9bad6; }
.hero__trust li { display: inline-flex; align-items: center; gap: 7px; }
.hero__trust svg { width: 15px; height: 15px; stroke: #4ade80; flex-shrink: 0; }
/* Hero 右侧产品展示卡 */
.hero__showcase { position: relative; }
.hero__card {
  position: relative; background: #fff; border-radius: 18px; padding: 26px;
  box-shadow: 0 30px 70px rgba(2, 10, 28, .55);
  animation: float 7s ease-in-out infinite;
}
.hero__card img { border-radius: 10px; background: var(--bg-soft); object-fit: contain; width: 100%; }
.hero__card-cap { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding-top: 16px; }
.hero__card-cap b { color: var(--ink); font-size: .95rem; }
.hero__card-cap span { font-size: .78rem; color: var(--muted); }
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }

/* ---------- 8. Stats 数据带 ---------- */
.stats { position: relative; z-index: 5; margin-top: -58px; }
.stats__grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  background: #fff; border-radius: 16px; box-shadow: var(--shadow-lg);
  border: 1px solid var(--line); overflow: hidden;
}
.stats__item { padding: 30px 20px; text-align: center; border-left: 1px solid var(--line); }
.stats__item:first-child { border-left: 0; }
.stats__num { font-size: 2.1rem; font-weight: 800; color: var(--navy-800); letter-spacing: -.02em; }
.stats__num em { font-style: normal; color: var(--accent); }
.stats__label { font-size: .83rem; color: var(--muted); margin-top: 4px; }

/* ---------- 9. 通用卡片 ---------- */
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  transition: transform .22s, box-shadow .25s, border-color .25s;
}
.card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); border-color: #c9d8ee; }

/* 产品线卡片 */
.line-card { padding: 20px 20px 26px; display: flex; flex-direction: column; }
.line-card__img {
  background: var(--bg-soft); border-radius: var(--radius-sm); padding: 18px;
  margin-bottom: 18px; display: flex; align-items: center; justify-content: center;
  min-height: 190px; overflow: hidden;
}
.line-card__img img { object-fit: contain; max-height: 160px; transition: transform .3s; }
.line-card:hover .line-card__img img { transform: scale(1.05); }
.line-card h3 { margin-bottom: 8px; font-size: 1.12rem; }
.line-card p { font-size: .9rem; color: var(--muted); flex: 1; }
.line-card__link { margin-top: 14px; font-weight: 700; font-size: .9rem; color: var(--blue-600); display: inline-flex; align-items: center; gap: 6px; }
.line-card__link svg { width: 15px; height: 15px; stroke: currentColor; transition: transform .2s; }
.line-card__link:hover svg { transform: translateX(4px); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }

/* 产品卡片（列表） */
.p-card { overflow: hidden; display: flex; flex-direction: column; }
.p-card__img { background: var(--bg-soft); padding: 16px; display: flex; align-items: center; justify-content: center; min-height: 170px; }
.p-card__img img { object-fit: contain; max-height: 140px; transition: transform .3s; }
.p-card:hover .p-card__img img { transform: scale(1.06); }
.p-card__body { padding: 16px 18px 20px; display: flex; flex-direction: column; flex: 1; }
.p-card__model {
  align-self: flex-start; font-size: .7rem; font-weight: 700; letter-spacing: .08em;
  text-transform: uppercase; color: var(--blue-600); background: var(--blue-soft);
  padding: 4px 10px; border-radius: 999px; margin-bottom: 10px;
}
.p-card h3 { font-size: 1.02rem; margin-bottom: 8px; }
.p-card h3 a { color: var(--ink); }
.p-card h3 a:hover { color: var(--blue-600); }
.p-card__chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: auto; padding-top: 12px; }
.chip {
  font-size: .72rem; font-weight: 600; color: var(--muted);
  background: var(--bg-soft); border: 1px solid var(--line);
  padding: 3px 9px; border-radius: 999px;
}
.p-card__foot { display: flex; align-items: center; justify-content: space-between; margin-top: 14px; }
.p-card__quote { font-size: .85rem; font-weight: 700; color: var(--accent-600); display: inline-flex; align-items: center; gap: 5px; }
.p-card__quote svg { width: 14px; height: 14px; stroke: currentColor; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }

/* 应用行业块 */
.app-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.app-tile {
  display: flex; flex-direction: column; align-items: center; gap: 12px;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 14px; text-align: center; transition: all .2s;
}
.app-tile:hover { border-color: var(--blue-600); transform: translateY(-4px); box-shadow: var(--shadow-md); }
.app-tile__icon {
  width: 58px; height: 58px; border-radius: 14px;
  background: linear-gradient(145deg, var(--blue-soft), #dcebfc);
  display: flex; align-items: center; justify-content: center;
}
.app-tile__icon svg { width: 27px; height: 27px; stroke: var(--blue-600); }
.app-tile b { font-size: .93rem; color: var(--ink); }

/* 优势特性 */
.feat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.feat {
  display: flex; gap: 16px; background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius); padding: 24px;
}
.feat__icon {
  width: 48px; height: 48px; flex-shrink: 0; border-radius: 12px;
  background: var(--navy-800); display: flex; align-items: center; justify-content: center;
}
.feat__icon svg { width: 23px; height: 23px; stroke: #fff; }
.feat h3 { font-size: 1rem; margin-bottom: 6px; }
.feat p { font-size: .88rem; color: var(--muted); margin: 0; }

/* 认证条 */
.certs { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px; }
.cert {
  display: inline-flex; align-items: center; gap: 9px;
  border: 1px solid var(--line); border-radius: 999px; padding: 10px 20px;
  background: #fff; font-weight: 700; font-size: .9rem; color: var(--ink);
}
.cert svg { width: 18px; height: 18px; stroke: var(--green); }

/* 客户评价 */
.t-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.t-card { padding: 26px; display: flex; flex-direction: column; }
.t-card__stars { display: flex; gap: 3px; margin-bottom: 14px; }
.t-card__stars svg { width: 16px; height: 16px; fill: #f5a623; stroke: #f5a623; }
.t-card blockquote { font-size: .93rem; color: var(--text); margin-bottom: 18px; flex: 1; }
.t-card__who { display: flex; align-items: center; gap: 12px; }
.t-card__avatar {
  width: 44px; height: 44px; border-radius: 50%; flex-shrink: 0;
  background: linear-gradient(145deg, var(--navy-700), var(--blue-600));
  color: #fff; display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: .9rem;
}
.t-card__who b { display: block; color: var(--ink); font-size: .92rem; }
.t-card__who span { font-size: .78rem; color: var(--muted); }

/* 博客卡片 */
.post-card { overflow: hidden; display: flex; flex-direction: column; }
.post-card__thumb {
  height: 150px; display: flex; align-items: center; justify-content: center; position: relative;
  background: linear-gradient(140deg, var(--navy-800), var(--blue-600));
}
.post-card__thumb svg { width: 42px; height: 42px; stroke: rgba(255, 255, 255, .85); }
.post-card__cat {
  position: absolute; top: 12px; left: 12px; font-size: .7rem; font-weight: 700;
  letter-spacing: .06em; text-transform: uppercase; color: #fff;
  background: rgba(5, 15, 34, .45); padding: 4px 10px; border-radius: 999px;
}
.post-card__body { padding: 18px 20px 22px; display: flex; flex-direction: column; flex: 1; }
.post-card__body time { font-size: .76rem; color: var(--muted); margin-bottom: 8px; }
.post-card h3 { font-size: 1rem; margin-bottom: 8px; }
.post-card h3 a { color: var(--ink); }
.post-card h3 a:hover { color: var(--blue-600); }
.post-card p { font-size: .87rem; color: var(--muted); flex: 1; margin: 0; }

/* ---------- 10. CTA 大横幅 ---------- */
.cta-band { position: relative; overflow: hidden; }
.cta-band__inner {
  position: relative; max-width: var(--container); margin-inline: auto; padding: 60px 20px;
  display: flex; align-items: center; justify-content: space-between; gap: 30px; flex-wrap: wrap;
}
.cta-band h2 { color: #fff; margin-bottom: 8px; }
.cta-band p { color: #a9bad6; margin: 0; max-width: 560px; }
.cta-band__actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- 11. 面包屑 ---------- */
.breadcrumb { background: var(--bg-soft); border-bottom: 1px solid var(--line); }
.breadcrumb ol { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; padding: 14px 0; font-size: .84rem; }
.breadcrumb li { display: inline-flex; align-items: center; gap: 8px; color: var(--muted); }
.breadcrumb li:not(:last-child)::after { content: "›"; color: #b9c6da; }
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--blue-600); }
.breadcrumb [aria-current="page"] { color: var(--ink); font-weight: 600; }

/* ---------- 12. 页面标题条 ---------- */
.page-head { background: linear-gradient(150deg, var(--navy-900), var(--navy-700)); color: #c9d6ea; }
.page-head__inner { padding: 52px 20px 54px; max-width: var(--container); margin-inline: auto; }
.page-head h1 { color: #fff; margin-bottom: 10px; }
.page-head p { color: #aebdd6; max-width: 680px; margin: 0; }

/* ---------- 13. 筛选器 ---------- */
.filters { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 34px; }
.filter-btn {
  padding: 9px 20px; border-radius: 999px; border: 1px solid var(--line);
  background: #fff; font-weight: 600; font-size: .88rem; color: var(--text); cursor: pointer;
  transition: all .18s;
}
.filter-btn:hover { border-color: var(--blue-600); color: var(--blue-600); }
.filter-btn.is-active { background: var(--navy-800); border-color: var(--navy-800); color: #fff; }
.p-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }

/* 侧栏布局（产品页） */
.with-side { display: grid; grid-template-columns: 250px 1fr; gap: 34px; align-items: start; }
.side-nav { position: sticky; top: calc(var(--header-h) + 20px); }
.side-nav__title {
  font-size: .78rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 12px;
}
.side-nav a {
  display: flex; justify-content: space-between; align-items: center;
  padding: 11px 14px; border-radius: var(--radius-sm); margin-bottom: 4px;
  font-weight: 600; font-size: .9rem; color: var(--text); border: 1px solid transparent;
}
.side-nav a:hover { background: var(--blue-soft); color: var(--blue-600); }
.side-nav a.is-active { background: var(--navy-800); color: #fff; }
.side-nav a small { font-weight: 600; opacity: .7; }
.side-nav__cta {
  margin-top: 18px; background: var(--bg-soft); border: 1px dashed var(--line);
  border-radius: var(--radius); padding: 18px; text-align: center;
}
.side-nav__cta b { display: block; color: var(--ink); font-size: .92rem; margin-bottom: 4px; }
.side-nav__cta p { font-size: .8rem; color: var(--muted); margin: 0 0 12px; }

/* ---------- 14. 产品详情 ---------- */
.pd { display: grid; grid-template-columns: 1fr 1.1fr; gap: 44px; align-items: start; }
.pd__gallery { position: sticky; top: calc(var(--header-h) + 20px); }
.pd__main-img {
  background: var(--bg-soft); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px; display: flex; align-items: center; justify-content: center; min-height: 380px;
}
.pd__main-img img { object-fit: contain; max-height: 340px; width: 100%; }
.pd__thumbs { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-top: 12px; }
.pd__thumbs button {
  background: var(--bg-soft); border: 2px solid var(--line); border-radius: var(--radius-sm);
  padding: 8px; cursor: pointer; transition: border-color .2s;
}
.pd__thumbs button:hover, .pd__thumbs button.is-active { border-color: var(--blue-600); }
.pd__thumbs img { object-fit: contain; height: 64px; width: 100%; }
.pd h1 { font-size: clamp(1.5rem, 2.6vw, 2rem); margin-bottom: 10px; }
.pd__model { display: inline-block; font-size: .76rem; font-weight: 700; letter-spacing: .1em; color: var(--blue-600); background: var(--blue-soft); padding: 5px 12px; border-radius: 999px; margin-bottom: 14px; }
.pd__lead { color: var(--muted); font-size: .98rem; margin-bottom: 20px; }
.spec-table { width: 100%; border-collapse: collapse; font-size: .9rem; margin-bottom: 22px; }
.spec-table th, .spec-table td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--line); }
.spec-table th { width: 42%; color: var(--muted); font-weight: 600; background: var(--bg-soft); }
.spec-table td { color: var(--ink); font-weight: 500; }
.pd__features { margin: 0 0 24px; }
.pd__features li { display: flex; gap: 10px; align-items: flex-start; padding: 7px 0; font-size: .93rem; }
.pd__features svg { width: 17px; height: 17px; stroke: var(--green); flex-shrink: 0; margin-top: 3px; }
.pd__cta-box {
  background: var(--bg-soft); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px; display: flex; align-items: center; justify-content: space-between; gap: 14px; flex-wrap: wrap;
}
.pd__cta-box b { color: var(--ink); font-size: .95rem; display: block; }
.pd__cta-box span { font-size: .8rem; color: var(--muted); }

/* 标签页 */
.tabs { margin-top: 64px; }
.tabs__nav { display: flex; gap: 4px; border-bottom: 2px solid var(--line); margin-bottom: 26px; overflow-x: auto; }
.tab-btn {
  padding: 12px 22px; font-weight: 700; font-size: .95rem; color: var(--muted);
  background: none; border: 0; cursor: pointer; white-space: nowrap;
  border-bottom: 3px solid transparent; margin-bottom: -2px;
}
.tab-btn:hover { color: var(--blue-600); }
.tab-btn.is-active { color: var(--blue-600); border-bottom-color: var(--accent); }
.tab-panel { display: none; }
.tab-panel.is-active { display: block; animation: fadeIn .3s ease; }
.tab-panel.is-active table{ margin:0px auto;}
.tab-panel.is-active img{ margin:0px auto;}
@keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
.tab-panel h3 { margin: 0 0 14px; }

/* ---------- 15. 联系页 ---------- */
.contact-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 40px; align-items: start; }
.contact-card {
  display: flex; gap: 16px; background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius); padding: 20px; margin-bottom: 14px;
}
.contact-card__icon {
  width: 46px; height: 46px; flex-shrink: 0; border-radius: 12px;
  background: var(--blue-soft); display: flex; align-items: center; justify-content: center;
}
.contact-card__icon svg { width: 21px; height: 21px; stroke: var(--blue-600); }
.contact-card b { display: block; color: var(--ink); margin-bottom: 3px; }
.contact-card p, .contact-card a { font-size: .9rem; color: var(--text); margin: 0; }
.contact-card a:hover { color: var(--blue-600); }

/* 表单 */
.form-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow-md); padding: 30px; }
.form-card h2 { font-size: 1.3rem; margin-bottom: 6px; }
.form-card > p { font-size: .88rem; color: var(--muted); margin-bottom: 22px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-field { display: flex; flex-direction: column; gap: 6px; }
.form-field--full { grid-column: 1 / -1; }
.form-field label { font-size: .83rem; font-weight: 600; color: var(--ink); }
.form-field label em { color: var(--accent-600); font-style: normal; }
.form-field input, .form-field select, .form-field textarea {
  font-family: inherit; font-size: .92rem; color: var(--ink);
  padding: 11px 14px; border: 1px solid var(--line); border-radius: var(--radius-sm);
  background: #fff; transition: border-color .2s, box-shadow .2s; width: 100%;
}
.form-field input:focus, .form-field select:focus, .form-field textarea:focus {
  outline: none; border-color: var(--blue-600); box-shadow: 0 0 0 3px rgba(29, 111, 224, .14);
}
.form-field textarea { min-height: 110px; resize: vertical; }
.form-note { font-size: .76rem; color: var(--muted); margin-top: 14px; }
.form-success {
  display: none; margin-top: 16px; padding: 14px 16px; border-radius: var(--radius-sm);
  background: #eafaf1; border: 1px solid #bce9cf; color: var(--green); font-weight: 600; font-size: .9rem;
}
.form-success.show { display: block; }

/* FAQ 手风琴（details/summary 无JS） */
.faq { max-width: 860px; margin-inline: auto; }
.faq details {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  margin-bottom: 12px; overflow: hidden;
}
.faq summary {
  list-style: none; cursor: pointer; display: flex; align-items: center; justify-content: space-between; gap: 14px;
  padding: 17px 22px; font-weight: 700; color: var(--ink); font-size: .97rem;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: ""; width: 10px; height: 10px; flex-shrink: 0;
  border-right: 2px solid var(--blue-600); border-bottom: 2px solid var(--blue-600);
  transform: rotate(45deg) translateY(-3px); transition: transform .2s;
}
.faq details[open] summary::after { transform: rotate(-135deg) translateY(-3px); }
.faq details[open] summary { color: var(--blue-600); }
.faq__body { padding: 0 22px 18px; font-size: .9rem; color: var(--text); }

/* ---------- 16. Footer ---------- */
.footer { background: var(--navy-950); color: #93a5c4; font-size: .88rem; }
.footer__grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px;
  padding: 60px 0 44px; max-width: var(--container); margin-inline: auto; padding-inline: 20px;
}
.footer h4 { color: #fff; font-size: .95rem; margin-bottom: 18px; letter-spacing: .02em; }
.footer__brand p { margin: 16px 0 20px; color: #8fa1c0; font-size: .86rem; }
.footer__brand img { height: 42px; width: auto; }
.footer ul li { margin-bottom: 10px; }
.footer ul a { color: #93a5c4; }
.footer ul a:hover { color: #fff; }
.footer__contact li { display: flex; gap: 10px; align-items: flex-start; margin-bottom: 14px; }
.footer__contact svg { width: 16px; height: 16px; stroke: var(--accent); flex-shrink: 0; margin-top: 4px; }
.footer__contact a { color: #93a5c4; }
.footer__contact a:hover { color: #fff; }
.footer__bottom { border-top: 1px solid rgba(255, 255, 255, .08); }
.footer__bottom-inner {
  max-width: var(--container); margin-inline: auto; padding: 20px;
  display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  font-size: .8rem; color: #6d80a3;
}

/* ---------- 17. 浮动 WhatsApp ---------- */
.wa-float {
  position: fixed; right: 22px; bottom: 22px; z-index: 90;
  display: flex; align-items: center; gap: 10px;
  background: #25d366; color: #fff; font-weight: 700; font-size: .9rem;
  padding: 14px 20px; border-radius: 999px; box-shadow: 0 10px 26px rgba(37, 211, 102, .4);
  transition: transform .2s;
}
.wa-float:hover { color: #fff; transform: translateY(-3px); }
.wa-float svg { width: 22px; height: 22px; fill: #fff; }

/* ---------- 18. 滚动显现 ---------- */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .6s ease, transform .6s ease; }
.reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
  .hero__card { animation: none; }
}

/* ---------- 19. 响应式 ---------- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(3, 1fr); }
  .app-grid { grid-template-columns: repeat(4, 1fr); }
  .hero__inner { grid-template-columns: 1fr; padding: 60px 20px 110px; }
  .hero__showcase { max-width: 460px; }
  .pd { grid-template-columns: 1fr; gap: 30px; }
  .pd__gallery { position: static; }
  .with-side { grid-template-columns: 1fr; }
  .side-nav { position: static; }
  .side-nav__group { display: flex; flex-wrap: wrap; gap: 6px; }
  .side-nav__group a { margin-bottom: 0; }
}
@media (max-width: 900px) {
  .nav, .header__cta .btn--quote { display: none; }
  .nav-toggle { display: inline-flex; }
  .grid-3, .feat-grid, .t-grid { grid-template-columns: repeat(2, 1fr); }
  .stats__grid { grid-template-columns: repeat(2, 1fr); }
  .stats__item { border-left: 0; border-top: 1px solid var(--line); }
  .stats__item:nth-child(-n+2) { border-top: 0; }
  .app-grid { grid-template-columns: repeat(3, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 620px) {
  .section { padding: 56px 0; }
  .grid-3, .grid-4, .feat-grid, .t-grid, .p-grid, .app-grid { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
.topbar__links li:nth-child(n+3) { display: none; }
  .footer__grid { grid-template-columns: 1fr; gap: 30px; }
  .wa-float span { display: none; }
  .wa-float { padding: 14px; }
}

/* ============ v2 新增：工程线条背景 / 合作流程 / 语言切换 ============ */
.hero__lines { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.hero__lines .l { fill: none; stroke: #fff; stroke-width: 1.3; opacity: .11; }
.hero__lines .l.dash { stroke-dasharray: 6 9; }
.hero__lines .l.faint { opacity: .17; }
.process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.process-step { position: relative; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 22px 24px; transition: transform .2s, box-shadow .25s; }
.process-step:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.process-step__num { width: 42px; height: 42px; border-radius: 50%; background: var(--navy-800); color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: 1.05rem; margin-bottom: 14px; }
.process-step h3 { font-size: 1rem; margin-bottom: 6px; }
.process-step p { font-size: .86rem; color: var(--muted); margin: 0; }
.process-step::after { content: ""; position: absolute; top: 47px; left: calc(100% + 6px); width: 14px; height: 2px; background: var(--line); }
.process-step:last-child::after { display: none; }
.topbar__lang--link { display: inline-flex; align-items: center; gap: 6px; padding: 5px 14px; border: 1px solid rgba(255,255,255,.28); border-radius: 999px; color: #fff; font-weight: 600; font-size: .82rem; }
.topbar__lang--link:hover { background: rgba(255,255,255,.1); color: #fff; }
@media (max-width: 900px) { .process-grid { grid-template-columns: repeat(2, 1fr); } .process-step::after { display: none; } }
@media (max-width: 620px) { .process-grid { grid-template-columns: 1fr; } }

/* ============ v2.1 新增：工程图纸元素 / 证书展示 ============ */
.hero__lines .center { stroke-dasharray: 20 4 3 4; opacity: .28; }
.hero__lines .lt { fill: #fff; opacity: .32; font-size: 13px; font-family: 'Inter', Arial, sans-serif; letter-spacing: .1em; stroke: none; }
.cert-show { margin: 40px auto 0; max-width: 560px; text-align: center; }
.cert-pdf { display: inline-flex; align-items: center; gap: 10px; padding: 15px 26px; border: 1px dashed var(--blue-600); border-radius: var(--radius); background: #fff; color: var(--blue-600); font-weight: 700; font-size: .92rem; transition: all .2s; }
.cert-pdf:hover { background: var(--blue-soft); border-style: solid; }
.cert-pdf svg { width: 22px; height: 22px; stroke: currentColor; }

.cert-show figcaption { font-size: .78rem; color: var(--muted); margin-top: 10px; }


/* ============ v2.2 新增：吸顶联系栏 / 页头图纸 / 微信悬浮 / 筛选链接 ============ */
.topbar { position: sticky; top: 0; z-index: 101; }
.mobile-nav { z-index: 115; }
.page-head { position: relative; overflow: hidden; }
a.filter-btn { display: inline-flex; align-items: center; }
.wx-float { position: fixed; right: 22px; bottom: 22px; z-index: 90; }
.wx-btn { display: flex; align-items: center; gap: 8px; background: #07c160; color: #fff; font-weight: 700; font-size: .9rem; padding: 14px 20px; border: 0; border-radius: 999px; cursor: pointer; box-shadow: 0 10px 26px rgba(7, 193, 96, .4); transition: transform .2s; font-family: inherit; }
.wx-btn:hover { transform: translateY(-3px); }
.wx-btn svg { width: 22px; height: 22px; fill: #fff; }
.wx-pop { position: absolute; right: 0; bottom: calc(100% + 14px); display: none; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow-lg); padding: 14px; width: 186px; text-align: center; }
.wx-pop.show { display: block; }
.wx-pop img { width: 156px; height: 156px; border-radius: 6px; object-fit: contain; }
.wx-pop p { font-size: .78rem; color: var(--muted); margin: 8px 0 0; }

/* ============ v2.3 新增：空状态 / 微信圆形按钮 ============ */
.no-results { text-align: center; padding: 44px 20px; color: var(--muted); background: var(--bg-soft); border: 1px dashed var(--line); border-radius: var(--radius); margin-top: 8px; }
.wx-btn { width: 64px; height: 64px; border-radius: 50%; padding: 0; justify-content: center; background: #07c160; box-shadow: 0 10px 26px rgba(7, 193, 96, .45), inset 0 0 0 3px rgba(255,255,255,.25); }
.wx-btn svg { width: 36px; height: 36px; }

/* v2.3.1：手机端精选产品一行2个（原620px断点为1列，现改为2列） */
@media (max-width: 620px) { .grid-4 { grid-template-columns: repeat(2, 1fr); gap: 14px; } }

/* ============ v2.4 新增：线稿卡片/页脚 / 证书下载框黑色简洁 ============ */
.footer { position: relative; overflow: hidden; }
.post-lines { position: absolute; right: 10px; bottom: 8px; width: 74px; height: 74px; }
.post-lines .l { opacity: .16; }
.footer-lines { position: absolute; right: -30px; bottom: -30px; width: 300px; height: 300px; pointer-events: none; }
.footer-lines .l { opacity: .07; }
.cert-pdf { color: var(--ink); border-color: #98a4b8; background: transparent; font-weight: 600; }
.cert-pdf:hover { background: transparent; border-color: var(--ink); color: var(--ink); }
.cert-pdf svg { stroke: var(--ink); }

/* v2.5：技术卡片局部线稿（单侧，疏密有致） */
.post-lines--l { left: 10px; right: auto; }
.post-lines .lt { font-size: 9px; }

/* v2.5：行业图标可点击 */
a.app-tile { text-decoration: none; }


/* v2.5：微信悬浮（圆形图标 + 圆角文字标签） */
.wx-main { display: flex; align-items: center; gap: 10px; background: transparent; border: 0; padding: 0; cursor: pointer; font-family: inherit; }
.wx-icon { width: 64px; height: 64px; border-radius: 50%; background: #07c160; display: flex; align-items: center; justify-content: center; box-shadow: 0 10px 26px rgba(7,193,96,.45), inset 0 0 0 3px rgba(255,255,255,.25); transition: transform .2s; }
.wx-icon svg { width: 36px; height: 36px; fill: #fff; }
.wx-main:hover .wx-icon { transform: translateY(-3px); }
.wx-label { background: #07c160; color: #fff; font-weight: 700; font-size: .95rem; padding: 13px 18px; border-radius: 12px; box-shadow: 0 10px 26px rgba(7,193,96,.35); white-space: nowrap; }
@media (max-width: 620px) { .wx-label { display: none; } }

/* v2.6：技术卡大号局部线稿 / 页脚大线稿 / 微信官方图标 */
.post-lines { width: 50%; height: 100%; right: 0; bottom: 0; }
.post-lines .l { opacity: .28; }
.post-lines--l { left: 0; right: auto; }
.footer-lines { width: 560px; height: 350px; right: -30px; bottom: -30px; }
.footer-lines .l { opacity: .10; }
.wx-icon svg { width: 36px; height: 36px; fill: #fff; }

/* v2.7：线稿元素统一白线（修复默认黑色填充导致的黑块） */
.post-lines .l, .footer-lines .l { fill: none; stroke: #fff; stroke-width: 1.5; stroke-linecap: round; }
.post-lines .dash, .footer-lines .dash { stroke-dasharray: 6 8; }
.post-lines .center, .footer-lines .center { stroke-dasharray: 18 4 3 4; }
.post-lines .faint, .footer-lines .faint { opacity: .8; }
.post-lines .lt, .footer-lines .lt { fill: #fff; stroke: none; font-family: 'Inter', Arial, sans-serif; font-size: 10px; }

/* v2.7：页脚4张线稿图（白线透明底，取自旋转接头线稿.png） */
.footer-art { position: absolute; right: 24px; bottom: 60px; display: flex; align-items: flex-end; gap: 14px; opacity: .35; pointer-events: none; }
.footer-art img { height: 92px; width: auto; }
@media (max-width: 900px) { .footer-art { display: none; } }
/* 线稿可见度微调 */
.hero__lines .l { opacity: .13; stroke-width: 1.5; }

/* v2.7b：真实参考线稿入蓝色背景 */
.page-art { position: absolute; right: 0; top: 50%; transform: translateY(-50%); height: 92%; width: auto; opacity: .5; pointer-events: none; object-fit: contain; }
.hero .page-art { top: auto; bottom: 0; transform: none; height: 68%; opacity: .45; }
.post-lines { object-fit: contain; }
@media (max-width: 900px) { .page-art { display: none; } }

/* v2.8：线稿位置布局 */
.page-art--tl { right: auto; left: 2%; top: 6%; bottom: auto; transform: none; height: 32%; opacity: .38; }
.page-art--bl { right: auto; left: 5%; top: auto; bottom: 3%; transform: none; height: 28%; opacity: .35; }
.page-art--br { right: 0; top: auto; bottom: 2%; transform: none; height: 36%; opacity: .33; }
.hero .page-art { height: 60%; opacity: .42; }
.cta-art { height: 86%; top: 50%; transform: translateY(-50%); opacity: .4; }
.post-lines--center { left: 50%; right: auto; transform: translateX(-50%); }
.footer-art { left: 50%; right: auto; transform: translateX(-50%); bottom: 54px; opacity: .3; }
.footer-art img { height: 108px; width: auto; }

/* v2.9：页脚线稿右侧垂直居中 */
.footer-art { right: 14px; left: auto; top: 50%; bottom: auto; transform: translateY(-50%); opacity: .28; }
.footer-art img { height: 300px; width: auto; }
@media (max-width: 1100px) { .footer-art { display: none; } }

/* v2.9：Hero四角线稿 */
.hero .page-art { opacity: .42; height: auto; }
.hero .page-art--tl { left: 2%; top: 9%; right: auto; bottom: auto; transform: none; height: 38%; }
.hero .page-art--tr { right: 2%; top: 9%; left: auto; bottom: auto; transform: none; height: 30%; }
.hero .page-art--bl { left: 3%; bottom: 3%; right: auto; top: auto; transform: none; height: 34%; }
.hero .page-art--br { right: 2%; bottom: 3%; left: auto; top: auto; transform: none; height: 36%; }

/* v2.9：微信随形气泡图标 */
.wx-icon { background: transparent; box-shadow: none; width: auto; height: auto; border-radius: 0; filter: drop-shadow(0 6px 12px rgba(7, 193, 96, .35)); }
.wx-icon svg { width: 60px; height: 60px; }

/* v2.10：微信悬浮=原版图标随形大绿边，位于页面最右侧垂直中间 */
.wx-float { right: 26px; top: 50%; bottom: auto; transform: translateY(-50%); }
.wx-main { background: transparent; }
.wx-icon { background: transparent; box-shadow: none; width: auto; height: auto; border-radius: 0; filter: drop-shadow(0 8px 18px rgba(7, 193, 96, .4)); }
.wx-icon img { width: 76px; height: 76px; display: block; }

/* v2.10：页头线稿靠近标题文字，不贴右侧 */
.page-head .page-art { right: auto; left: 34%; top: 50%; transform: translateY(-50%); height: 86%; opacity: .5; }

/* v2.11：微信=原版图标圆形按钮，右侧中间偏下 */
.wx-float { right: 26px; top: 57%; }
.wx-icon { width: 76px; height: 76px; border-radius: 50%; background: #07C160; overflow: hidden; box-shadow: 0 10px 26px rgba(7, 193, 96, .45); filter: none; }
.wx-icon img { width: 100%; height: 100%; object-fit: cover; display: block; }

/* v2.11：产品中心页头线稿靠右（留3%空间） */
.page-head .page-art--right { right: 3%; left: auto; }
/* v2.11：基础知识卡线稿明暗与其他卡一致 */
.post-lines--center { opacity: .6; }

/* v2.12：微调 */
.post-lines--center { opacity: .35; }
.wx-float { top: 71%; }
.page-head .page-art--right { right: 10%; }

/* v2.13：CTA白色线稿提亮 */
.cta-art { opacity: .65; }
/* v2.13：产品详情页CTA 左=局部2 右=局部1 */
.cta-art--l { left: 4%; right: auto; }
.cta-art--r { right: 4%; left: auto; }

/* v2.14：详情页CTA两图右侧拼接成完整线稿 + 提亮 */
.cta-strip { position: absolute; right: 4%; top: 50%; transform: translateY(-50%); display: flex; align-items: flex-end; gap: 0; height: 86%; pointer-events: none; }
.cta-strip img { height: 100%; width: auto; opacity: .85; }

/* v2.15：页脚回转接头线稿（含补画法兰），最右侧垂直中间，白色线条 */
.footer-swivel { position: absolute; right: 8%; top: 50%; transform: translateY(-50%); height: 62%; opacity: .4; pointer-events: none; }
.footer-swivel img { height: 100%; width: auto; }
@media (max-width: 1100px) { .footer-swivel { display: none; } }

/* ===== 站内搜索 ===== */
.header { position: relative; }
.search-box { display: flex; align-items: center; gap: 8px; margin-right: 8px; height: 30px; padding: 0 14px 0 12px; border: 1px solid rgba(255,255,255,.18); border-radius: 999px; background: rgba(255,255,255,.07); }
.search-box__icon { width: 14px; height: 14px; stroke: #8fa1c0; flex: none; }
.search-box input { width: 210px; border: 0; background: transparent; color: #fff; font: inherit; font-size: .85rem; outline: none; }
.search-box input:focus { border: 0; background: transparent; }
.search-box input::placeholder { color: #8fa1c0; }
@media (max-width: 900px) {
  .search-box { padding: 0 12px 0 10px; }
  .search-box input { width: 110px; }
}
/* 搜索页 */
.search-form { display: flex; gap: 10px; margin-bottom: 6px; }
.search-form input { flex: 1; height: 50px; padding: 0 18px; border: 1px solid rgba(255,255,255,.16); border-radius: 12px; background: rgba(255,255,255,.06); color: #fff; font: inherit; font-size: 1rem; outline: none; }
.search-form input:focus { border-color: rgba(255,255,255,.38); }
.search-form button { height: 50px; padding: 0 26px; border: 0; border-radius: 12px; background: #ff7a00; color: #fff; font: inherit; font-weight: 700; cursor: pointer; }
.search-form button:hover { background: #e56e00; }
.search-hint { color: #8fa1c0; font-size: .85rem; margin-bottom: 26px; }
.sr-item { padding: 16px 0; border-bottom: 1px solid rgba(255,255,255,.08); }
.sr-item .sr-cat { font-size: .75rem; letter-spacing: .08em; text-transform: uppercase; color: #ff9a3d; font-weight: 700; }
.sr-item h3 { margin: 4px 0 4px; }
.sr-item h3 a { color: #fff; text-decoration: none; }
.sr-item h3 a:hover { color: #ff9a3d; }
.sr-item p { color: #9fb0c9; font-size: .92rem; margin: 0; }
.sr-count { color: #8fa1c0; font-size: .88rem; margin-bottom: 14px; }
.sr-empty { padding: 40px 0; color: #8fa1c0; text-align: center; }
/* 顶栏搜索适配 */
@media (max-width: 620px) {
  .topbar__links li:nth-child(2) { display: none; }
  .search-box input { width: 90px; }
}
/* 友情链接 */
.footer__links { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 20px; padding: 14px 0; border-top: 1px solid rgba(255,255,255,.08); color: #8fa1c0; font-size: .82rem; max-width: 1240px; margin: 0 auto; }
.footer__links-label { color: #aebdd6; font-weight: 600; }
.footer__links a { color: #8fa1c0; text-decoration: none; }
.footer__links a:hover { color: #fff; }
/* 应用案例卡片 */

/* 应用案例卡片（与全站卡片风格统一：白底、黑色标题、灰色摘要） */
.case-card { display: block; padding: 26px 24px; text-decoration: none; transition: transform .2s ease, border-color .2s ease, background .2s ease; }
.case-card:hover { transform: translateY(-3px); border-color: rgba(19,35,61,.25); background: #fbfdff; }
.case-card h3 { color: var(--ink); font-size: 1.08rem; margin: 0 0 8px; line-height: 1.4; }
.case-card p { color: #5a6b85; font-size: .9rem; line-height: 1.65; margin: 0; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
/* CTA 横幅统一高度(与产品中心/产品内页/联系我们一致, 线稿完整显示) */
.cta-band { min-height: 227px; }
.cta-band__inner { min-height: 227px; box-sizing: border-box; }
/* CTA 差异化文案占位：标题预留2行、描述预留3行，各页文案不同但横幅高度与线稿显示完全一致 */
.cta-band h2 { min-height: 2.4em; display: flex; align-items: center; }
.cta-band p { min-height: 4.8em; display: flex; align-items: center; }
/* 页脚产品中心折叠 */


/* 页脚产品中心：上部分显示 + 展开按钮（与公司栏"隐私政策"同行） */
.footer-cat__list li:nth-child(n+7) { display: none; }
.footer-cat__list.open li:nth-child(n+7) { display: list-item; }
.footer-cat__toggle {
  background: none; border: none; padding: 0; margin-top: 12px;
  color: #8fa1c0; cursor: pointer; font-size: .82rem; font-family: inherit;
}
.footer-cat__toggle:hover { color: #fff; }
/* ---------- Hero 产品图轮换 ---------- */
.hero__slider { overflow: hidden; }
.hero-slide { display: none; border-radius: 10px; }
.hero-slide.active { display: block; }