/* 参数没有 k/v 结构时，速览条目改为整行显示 */
.prod__specs--plain { grid-template-columns: 1fr; }
.prod__spec--full { grid-column: 1 / -1; }
.prod__spec--full dd { margin: 0; }
/* =====================================================================
   尔凡流体 ERFAN FLUID — 企业官网样式系统
   风格：重工蓝图 / Heavy Industry Blueprint
   ---------------------------------------------------------------------
   目录
   01 设计令牌 Tokens
   02 基础与排版 Reset & Typography
   03 布局 Layout (container / band / section / grid)
   04 通用元件 Elements (按钮 / 标签 / 徽标 / 分隔)
   05 页头与导航 Header & Nav
   06 页脚 Footer
   07 首页模块 Modules
   08 组件 Components (卡片 / 表格 / 标签页 / 手风琴 / 时间轴 …)
   09 表单 Forms
   10 响应式 Responsive
   11 动效与无障碍 Motion & A11y
   ===================================================================== */

/* ---------------------------------------------------------------- 01 令牌 */
/* 品牌色实测自公司产品样件（不锈钢双表减压阀）：
     手轮蓝 #0054C8 / 高光 #0365EC · 表盘刻度与字标红 #BF2534
     不锈钢 #A6A5A3 → #C8CCD5（冷调）· 表盘白 #FFFFFF
   默认语境为「钢白浅色」；深色锚点区（首屏 / 页头 / CTA / 页脚 / 抽屉）见下方 .band--dark 组。
   强调色分「文本线」与「实心块」两档，避免深底上蓝字对比度不足或按钮白字发灰。 */
:root,
.band--light {
  --brand-blue: #3868D8;      /* 商标标准蓝（F 顶部横条） */
  --brand-blue-lt: #4A78E8;
  --brand-red: #C00820;       /* 商标标准红（ERFAN 字标） */

  --accent: #3868D8;          /* 文字 / 线条 / 图标：白底 5.1:1 */
  --accent-2: #4A78E8;
  --accent-solid: #3868D8;    /* 实心块底色（白字 5.1:1） */
  --accent-solid-2: #2F5FCC;  /* 实心块悬停 */
  --accent-on: #FFFFFF;       /* 实心块文字 */
  --accent-soft: rgba(56, 104, 216, .10);
  --accent-line: rgba(56, 104, 216, .38);
  --danger-soft: rgba(192, 8, 32, .10);

  --bg: #F3F6F9;
  --bg-2: #E8EDF3;
  --bg-3: #FFFFFF;

  --fg: #0E1725;
  --fg-2: #3B4759;
  --fg-dim: #5D6A7D;
  --fg-mute: #74839A;

  --line: rgba(16, 32, 54, .13);
  --line-2: rgba(16, 32, 54, .26);
  --card: #FFFFFF;
  --card-2: #F6F9FC;
  --card-line: rgba(16, 32, 54, .11);
  --grid-line: rgba(16, 32, 54, .055);
  --hatch-a: rgba(16, 32, 54, .06);

  --ok: #148F5B;
  --warn: #C00820;

  --plate-bg: linear-gradient(165deg, #FFFFFF 0%, #E7EEF7 100%);
  --card-shadow: 0 22px 48px -42px rgba(16, 32, 54, .55);
  --shadow: 0 26px 60px -36px rgba(12, 26, 46, .30);
  --shadow-sm: 0 10px 26px -18px rgba(12, 26, 46, .24);
  --t: .38s cubic-bezier(.22, .61, .36, 1);
}

/* 深色钢蓝语境：深底上蓝色需提亮，实心按钮改用中蓝以确保白字对比度 */
.band--dark,
.hero,
.page-hero,
.cta,
.ftr,
.topbar,
.hdr,
.drawer {
  --accent: #7BA5FF;
  --accent-2: #9CBEFF;
  --accent-solid: #2F63D6;
  --accent-solid-2: #3B72E8;
  --accent-on: #FFFFFF;
  --accent-soft: rgba(123, 165, 255, .15);
  --accent-line: rgba(123, 165, 255, .42);
  --danger-soft: rgba(255, 92, 110, .14);

  --bg: #0B1524;
  --bg-2: #101E31;
  --bg-3: #16273D;

  --fg: #E9EFF7;
  --fg-2: #B9C6D8;
  --fg-dim: #8798AE;
  --fg-mute: #7A8CA4;

  --line: rgba(255, 255, 255, .11);
  --line-2: rgba(255, 255, 255, .22);
  --card: #122032;
  --card-2: #16263B;
  --card-line: rgba(255, 255, 255, .10);
  --grid-line: rgba(255, 255, 255, .05);
  --hatch-a: rgba(255, 255, 255, .05);

  --warn: #FF5C6E;
  --ok: #34D399;
  --card-shadow: 0 22px 48px -44px rgba(0, 0, 0, .85);
  --plate-bg: linear-gradient(165deg, #122032 0%, #0A1322 100%);
  --shadow: 0 26px 64px -34px rgba(0, 0, 0, .85);
  --shadow-sm: 0 10px 30px -18px rgba(0, 0, 0, .7);
}

:root {
  /* 字体 */
  --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-cond: "Bahnschrift", "DIN Alternate", "Arial Narrow", "Oswald", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-mono: "Cascadia Mono", "Consolas", "SFMono-Regular", "DejaVu Sans Mono", "Courier New", monospace;

  /* 尺度 */
  --wrap: 1280px;
  --gut: 32px;
  --sec-y: 104px;
  --nav-h: 76px;
  --top-h: 38px;

  --r: 2px;
}

/* 说明：浅色语境现已与 :root 合并（见上方选择器组），
   若需在深色区块内嵌套浅色区域，继续沿用 .band--light 类名即可。 */

/* ------------------------------------------------------- 02 基础与排版 */
*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 20px);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  font-weight: 400;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img, svg, video { max-width: 100%; display: block; }
img { height: auto; }
/* 组件大量使用 display:flex/grid，会盖过浏览器默认的 [hidden]，这里统一兜底 */
[hidden] { display: none !important; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; cursor: pointer; }
ul, ol { margin: 0; padding: 0; list-style: none; }
p { margin: 0 0 1.1em; }
p:last-child { margin-bottom: 0; }
hr { border: 0; border-top: 1px solid var(--line); margin: 0; }
table { border-collapse: collapse; width: 100%; }
figure { margin: 0; }

h1, h2, h3, h4, h5 {
  margin: 0 0 .5em;
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: .005em;
  color: var(--fg);
  /* 中文标题避免出现"最后一个字单独成行"的孤字排版 */
  text-wrap: balance;
}
h1 { font-size: clamp(2.1rem, 3.4vw, 3.2rem); }
h2 { font-size: clamp(1.7rem, 2.7vw, 2.5rem); letter-spacing: -.005em; }
h3 { font-size: clamp(1.15rem, 1.5vw, 1.4rem); }
h4 { font-size: 1.05rem; }
h5 { font-size: .95rem; }

::selection { background: var(--accent-solid); color: var(--accent-on); }

/* 通用文本工具 */
.hl { color: var(--accent); }
.dim { color: var(--fg-dim); }
.mono { font-family: var(--font-mono); }
.cond {
  font-family: var(--font-cond);
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
}
.lead { font-size: 1.0625rem; color: var(--fg-2); line-height: 1.85; }
.tnum { font-variant-numeric: tabular-nums; }

/* 小标签：工业图纸式注记 */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--accent);
  flex: none;
}
.eyebrow--plain::before { display: none; }

/* 序号：01 / 02 */
.idx {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .18em;
  color: var(--fg-mute);
}

/* ---------------------------------------------------------------- 03 布局 */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gut);
}
.wrap--wide { max-width: 1480px; }
.wrap--narrow { max-width: 940px; }

.band {
  position: relative;
  background: var(--bg);
  color: var(--fg);
}
.band--light { background: var(--bg); }
.band--dark { background: var(--bg); }
.band--alt { background: var(--bg-2); }

/* 深色区底纹：蓝图网格 */
.band--grid::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 64px 64px;
  pointer-events: none;
  z-index: 0;
}
.band--grid > * { position: relative; z-index: 1; }

.sec { padding-block: var(--sec-y); }
.sec--tight { padding-block: 72px; }
.sec--flush-top { padding-top: 0; }

/* 角标：工程图纸的定位角 */
.corner-ticks { position: relative; }
.corner-ticks::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(var(--accent) 0 0) 0 0 / 16px 2px no-repeat,
    linear-gradient(var(--accent) 0 0) 0 0 / 2px 16px no-repeat,
    linear-gradient(var(--accent) 0 0) 100% 0 / 16px 2px no-repeat,
    linear-gradient(var(--accent) 0 0) 100% 0 / 2px 16px no-repeat,
    linear-gradient(var(--accent) 0 0) 0 100% / 16px 2px no-repeat,
    linear-gradient(var(--accent) 0 0) 0 100% / 2px 16px no-repeat,
    linear-gradient(var(--accent) 0 0) 100% 100% / 16px 2px no-repeat,
    linear-gradient(var(--accent) 0 0) 100% 100% / 2px 16px no-repeat;
  opacity: .85;
}

/* 警示斜纹带 */
.hazard {
  height: 8px;
  background: repeating-linear-gradient(45deg,
    var(--brand-red) 0 12px, #0B1524 12px 24px);
}
.hazard--thin { height: 5px; }

/* 水印大字 */
.watermark {
  position: absolute;
  left: 0;
  right: 0;
  font-family: var(--font-cond);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .04em;
  line-height: .8;
  white-space: nowrap;
  color: transparent;
  -webkit-text-stroke: 1px var(--line);
  pointer-events: none;
  user-select: none;
  z-index: 0;
}

/* 网格布局工具 */
.grid { display: grid; gap: 24px; }
.g-2 { grid-template-columns: repeat(2, 1fr); }
.g-3 { grid-template-columns: repeat(3, 1fr); }
.g-4 { grid-template-columns: repeat(4, 1fr); }
.g-5 { grid-template-columns: repeat(5, 1fr); }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.split--aside { grid-template-columns: minmax(0, 1fr) 360px; align-items: start; gap: 48px; }

/* 章节标题 */
.sec-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px 40px;
  padding-bottom: 26px;
  margin-bottom: 52px;
  border-bottom: 1px solid var(--line);
  position: relative;
}
.sec-head::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 84px;
  height: 3px;
  background: var(--accent);
}
.sec-head__main { max-width: 720px; }
.sec-head h2 { margin-bottom: 0; }
.sec-head__sub {
  max-width: 420px;
  font-size: .9375rem;
  color: var(--fg-dim);
  line-height: 1.8;
}
.sec-head--center {
  flex-direction: column;
  align-items: center;
  text-align: center;
}
.sec-head--center .sec-head__sub { text-align: center; }

/* ------------------------------------------------------------- 04 元件 */
/* 按钮：切角工业按钮 */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  height: 52px;
  padding: 0 30px;
  font-size: .8125rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--fg);
  background: transparent;
  border: 1px solid var(--line-2);
  clip-path: polygon(0 0, calc(100% - 13px) 0, 100% 13px, 100% 100%, 13px 100%, 0 calc(100% - 13px));
  transition: background var(--t), color var(--t), border-color var(--t), transform var(--t);
  white-space: nowrap;
}
.btn:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }
.btn:active { transform: translateY(0); }
.btn--primary {
  background: var(--accent-solid);
  border-color: var(--accent-solid);
  color: var(--accent-on);
}
.btn--primary:hover {
  background: var(--accent-solid-2);
  border-color: var(--accent-solid-2);
  color: var(--accent-on);
}
.btn--ghost { border-color: var(--line-2); }
.btn--sm { height: 42px; padding: 0 22px; font-size: .75rem; }
.btn--lg { height: 58px; padding: 0 38px; font-size: .875rem; }
.btn--block { width: 100%; }
.btn__arrow { transition: transform var(--t); }
.btn:hover .btn__arrow { transform: translateX(5px); }

/* 文字链接 */
.tlink {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: .8125rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--accent);
  padding-bottom: 3px;
  border-bottom: 1px solid var(--accent-line);
  transition: gap var(--t), border-color var(--t);
}
.tlink:hover { gap: 14px; border-color: var(--accent); }
.tlink--mute { color: var(--fg-dim); border-color: var(--line); }
.tlink--mute:hover { color: var(--accent); border-color: var(--accent); }

/* 徽标 / 规格牌 */
.plate {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 13px;
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--fg-dim);
  background: var(--card-2);
  border: 1px solid var(--card-line);
  border-radius: var(--r);
}
.plate--accent { color: var(--accent); border-color: var(--accent-line); background: var(--accent-soft); }
.plates { display: flex; flex-wrap: wrap; gap: 10px; }

/* 分类筛选 */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 40px;
}
.filter {
  padding: 9px 18px;
  font-size: .8125rem;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--fg-dim);
  border: 1px solid var(--line);
  border-radius: var(--r);
  transition: color var(--t), border-color var(--t), background var(--t);
}
.filter:hover { color: var(--fg); border-color: var(--line-2); }
.filter.is-active {
  color: var(--accent-on);
  background: var(--accent-solid);
  border-color: var(--accent-solid);
}
.filter__count {
  font-family: var(--font-mono);
  font-size: .625rem;
  margin-left: 6px;
  opacity: .7;
}

/* 面包屑 */
.crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .08em;
  color: var(--fg-mute);
}
.crumb a { color: var(--fg-dim); transition: color var(--t); }
.crumb a:hover { color: var(--accent); }
.crumb__sep { color: var(--fg-mute); opacity: .6; }

/* 页头（内页） */
.page-hero {
  position: relative;
  padding-block: 76px 68px;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}
.page-hero__inner { position: relative; z-index: 2; }
.page-hero h1 { margin: 18px 0 16px; max-width: 20ch; }
.page-hero__sub { max-width: 640px; color: var(--fg-dim); font-size: 1rem; }
.page-hero .watermark {
  bottom: -6px;
  right: -10px;
  left: auto;
  font-size: clamp(4rem, 12vw, 11rem);
  opacity: .8;
}
.page-hero--tall { padding-block: 96px 84px; }

/* -------------------------------------------------------- 05 页头与导航 */
.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 999;
  padding: 12px 20px;
  background: var(--accent-solid);
  color: var(--accent-on);
  font-weight: 700;
}
.skip:focus { left: 12px; top: 12px; }

.topbar {
  background: #060E1A;
  border-bottom: 1px solid rgba(255, 255, 255, .08);
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .1em;
  color: #8496AE;
}
.topbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: var(--top-h);
}
.topbar__list { display: flex; align-items: center; gap: 26px; }
.topbar__list a { transition: color var(--t); }
.topbar__list a:hover { color: var(--accent); }
.topbar__item { display: inline-flex; align-items: center; gap: 8px; }
.topbar__dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 0 3px rgba(47, 191, 113, .18);
}
.topbar__lang { display: flex; align-items: center; gap: 10px; }
.topbar__lang .is-on { color: var(--accent); }
.topbar__lang span { opacity: .35; }

.hdr {
  position: sticky;
  top: 0;
  z-index: 90;
  background: rgba(8, 16, 28, .88);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  backdrop-filter: blur(16px) saturate(140%);
  border-bottom: 1px solid var(--line);
  transition: background var(--t), box-shadow var(--t);
}
.hdr.is-scrolled {
  background: rgba(6, 12, 22, .96);
  box-shadow: 0 14px 40px -26px rgba(0, 0, 0, .95);
}
.hdr__inner {
  display: flex;
  align-items: center;
  gap: 34px;
  height: var(--nav-h);
  transition: height var(--t);
}
.hdr.is-scrolled .hdr__inner { height: 64px; }

/* 品牌区：商标 LOGO 直接压在深色页头上（无底板、标准透明底）。
   深色底使用深底专用变体 logo-erfan-dark.png —— 保留商标红蓝双色识别，
   仅把明度提亮到红 5.2:1 / 蓝 7.5:1，避免品牌红在深钢蓝上发闷（原色仅 2.9:1）。 */
.brand { display: flex; flex-direction: column; align-items: flex-start; flex: none; }
.brand__logo {
  display: block;
  height: 36px;
  width: auto;
  transition: height var(--t);
}
.hdr.is-scrolled .brand__logo { height: 28px; }
.brand__cn {
  font-family: var(--font-mono);
  font-size: .625rem;
  letter-spacing: .14em;
  color: #8395AC;
  margin-top: 7px;
  transition: margin var(--t);
}
.hdr.is-scrolled .brand__cn { margin-top: 5px; }
.ftr .brand__logo { height: 38px; }

.nav { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav__item { position: relative; }
.nav__link {
  display: flex;
  align-items: center;
  gap: 7px;
  height: 42px;
  padding: 0 15px;
  font-size: .875rem;
  font-weight: 600;
  color: #C2CEDE;
  border-radius: var(--r);
  transition: color var(--t), background var(--t);
}
.nav__link:hover { color: #fff; background: rgba(255, 255, 255, .05); }
.nav__item.is-active > .nav__link { color: var(--accent); }
.nav__item.is-active > .nav__link::after {
  content: "";
  position: absolute;
  left: 15px;
  right: 15px;
  bottom: -1px;
  height: 2px;
  background: var(--accent);
}
.nav__caret {
  width: 9px; height: 9px;
  border-right: 1.6px solid currentColor;
  border-bottom: 1.6px solid currentColor;
  transform: rotate(45deg) translate(-2px, -2px);
  transition: transform var(--t);
  opacity: .7;
}
.nav__item.is-open .nav__caret { transform: rotate(-135deg) translate(-3px, -3px); }

/* 下拉面板 */
.sub {
  position: absolute;
  top: calc(100% + 14px);
  left: 50%;
  transform: translate(-50%, 10px);
  width: min(860px, 80vw);
  padding: 26px 28px 28px;
  background: #0E1B2C;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--t), transform var(--t), visibility var(--t);
  z-index: 20;
}
.sub::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--accent);
}
.nav__item.is-open .sub { opacity: 1; visibility: visible; transform: translate(-50%, 0); }
.sub__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 4px 18px; }
.sub__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 10px;
  border-radius: var(--r);
  transition: background var(--t), color var(--t);
}
.sub__link:hover { background: rgba(107, 166, 255, .12); }
.sub__code {
  font-family: var(--font-mono);
  font-size: .6875rem;
  color: var(--accent);
  flex: none;
}
.sub__name { font-size: .875rem; color: #C2CEDE; }
.sub__link:hover .sub__name { color: #fff; }
.sub__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-top: 22px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-size: .8125rem;
  color: #8798AE;
}

.hdr__cta { flex: none; }

/* 汉堡按钮 */
.burger {
  display: none;
  width: 46px;
  height: 42px;
  border: 1px solid var(--line-2);
  border-radius: var(--r);
  position: relative;
  flex: none;
  margin-left: auto;
}
.burger span {
  position: absolute;
  left: 12px;
  right: 12px;
  height: 2px;
  background: #C2CEDE;
  transition: transform var(--t), opacity var(--t);
}
.burger span:nth-child(1) { top: 14px; }
.burger span:nth-child(2) { top: 20px; }
.burger span:nth-child(3) { top: 26px; }
.burger.is-open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.burger.is-open span:nth-child(2) { opacity: 0; }
.burger.is-open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* 移动抽屉 */
.drawer {
  position: fixed;
  inset: 0 0 0 auto;
  width: min(420px, 88vw);
  background: #0A1424;
  border-left: 1px solid var(--line);
  transform: translateX(101%);
  transition: transform .44s cubic-bezier(.22, .61, .36, 1);
  z-index: 120;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  overscroll-behavior: contain;
}
.drawer.is-open { transform: none; }
.drawer__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: #0A1424;
  z-index: 2;
}
.drawer__close {
  width: 40px; height: 40px;
  border: 1px solid var(--line-2);
  color: #C2CEDE;
  font-size: 1.1rem;
  line-height: 1;
}
.drawer__body { padding: 10px 22px 30px; }
.drawer__group { border-bottom: 1px solid var(--line); }
.drawer__toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 16px 0;
  font-size: 1rem;
  font-weight: 700;
  color: #E4EBF4;
  text-align: left;
}
.drawer__toggle .nav__caret { opacity: .5; }
.drawer__group.is-open .drawer__toggle { color: var(--accent); }
.drawer__group.is-open .drawer__toggle .nav__caret { transform: rotate(-135deg) translate(-3px, -3px); opacity: 1; }
.drawer__panel { display: none; padding: 0 0 14px; }
.drawer__group.is-open .drawer__panel { display: block; }
.drawer__panel a {
  display: block;
  padding: 9px 0 9px 14px;
  font-size: .875rem;
  color: #A3B3C8;
  border-left: 1px solid var(--line);
  transition: color var(--t), border-color var(--t);
}
.drawer__panel a:hover { color: var(--accent); border-color: var(--accent); }
.drawer__foot {
  padding-bottom: calc(34px + env(safe-area-inset-bottom, 0px)); padding: 24px 22px 34px; display: grid; gap: 14px; }
.drawer__meta {
  font-family: var(--font-mono);
  font-size: .75rem;
  color: #8798AE;
  letter-spacing: .06em;
}
.scrim {
  position: fixed;
  inset: 0;
  background: rgba(6, 12, 22, .72);
  -webkit-backdrop-filter: blur(3px);
  backdrop-filter: blur(3px);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--t), visibility var(--t);
  z-index: 110;
}
.scrim.is-open { opacity: 1; visibility: visible; }

/* ---------------------------------------------------------------- 06 页脚 */
.ftr {
  background: #060E1A;
  color: #96A6BC;
  border-top: 1px solid rgba(255, 255, 255, .08);
  position: relative;
  overflow: hidden;
}
.ftr__main {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.15fr;
  gap: 48px 40px;
  padding-block: 68px 54px;
  position: relative;
  z-index: 2;
}
.ftr__brand .brand { margin-bottom: 20px; }
.ftr__desc { font-size: .875rem; line-height: 1.9; color: #7F90A6; max-width: 34ch; }
.ftr__col h4,
.ftr__col h3.ftr__coltitle {
  font-family: var(--font-mono);
  font-size: .6875rem;
  font-weight: 400;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}
.ftr__links { display: grid; gap: 11px; }
.ftr__links a { font-size: .875rem; color: #96A6BC; transition: color var(--t), transform var(--t); display: inline-block; }
.ftr__links a:hover { color: #fff; transform: translateX(4px); }
.ftr__contact { display: grid; gap: 16px; }
.ftr__contact dt {
  font-family: var(--font-mono);
  font-size: .625rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: #66788F;
  margin-bottom: 4px;
}
.ftr__contact dd { margin: 0; font-size: .875rem; color: #C2CEDE; }
.ftr__hot { font-family: var(--font-cond); font-size: 1.5rem; letter-spacing: .06em; color: #fff; }
.ftr__bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px 28px;
  padding-block: 22px;
  border-top: 1px solid rgba(255, 255, 255, .08);
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .06em;
  color: #66788F;
  position: relative;
  z-index: 2;
}
.ftr__bar a:hover { color: var(--accent); }
.ftr__barlinks { display: flex; flex-wrap: wrap; gap: 20px; }
.ftr .watermark {
  bottom: -28px;
  left: -6px;
  font-size: clamp(3.6rem, 11vw, 9rem);
  -webkit-text-stroke-color: rgba(255, 255, 255, .055);
  opacity: 1;
}

/* 回到顶部 */
.totop {
  /* 避开 iPhone 手势条 */
  bottom: calc(26px + env(safe-area-inset-bottom, 0px));
  position: fixed;
  right: 26px;
  bottom: 26px;
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  background: var(--accent-solid);
  color: var(--accent-on);
  border-radius: var(--r);
  box-shadow: 0 14px 34px -14px rgba(9, 20, 38, .45);
  opacity: 0;
  visibility: hidden;
  transform: translateY(14px);
  transition: opacity var(--t), transform var(--t), visibility var(--t);
  z-index: 80;
}
.totop.is-on { opacity: 1; visibility: visible; transform: none; }
.totop:hover { background: var(--accent-2); }

/* ------------------------------------------------------------ 07 首页模块 */
/* Hero */
.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(120% 88% at 82% -10%, rgba(255, 255, 255, .12), transparent 58%),
    linear-gradient(168deg, #3768DE 0%, #2F63D6 42%, #2450B8 100%);
}

/* 首屏"蓝底语境"：品牌蓝 #3868D8 是中等明度，深藏青那套取值在其上会失效
   （主按钮 #2F63D6 几乎不可见、灰蓝正文对比仅 1.7:1），故整体重定 */
.hero {
  --fg: #FFFFFF;
  --fg-2: rgba(255, 255, 255, .93);
  --fg-dim: rgba(255, 255, 255, .78);
  --fg-mute: rgba(255, 255, 255, .68);

  --line: rgba(255, 255, 255, .24);
  --line-2: rgba(255, 255, 255, .38);
  --grid-line: rgba(255, 255, 255, .07);

  --accent: #A9C7FF;                 /* 标题高亮字（比首行纯白深一档，形成可见的层次） */
  --accent-2: #FFFFFF;
  --accent-solid: #FFFFFF;           /* 主按钮反白，白底蓝字 */
  --accent-solid-2: #F0F5FF;
  --accent-on: #2A55BE;
  --accent-soft: rgba(255, 255, 255, .16);
  --accent-line: rgba(255, 255, 255, .8);

  --bg: #2450B8;                     /* 数据看板单元格用更深一档的蓝 */
  --card: #2450B8;
  --card-2: #1F47A6;
  --card-line: rgba(255, 255, 255, .26);
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(86% 74% at 76% 2%, rgba(255, 255, 255, .18), rgba(255, 255, 255, .04) 48%, transparent 70%),
    radial-gradient(78% 108% at -6% 62%, rgba(10, 34, 104, .38), transparent 66%),
    linear-gradient(180deg, rgba(255, 255, 255, 0) 58%, rgba(12, 34, 96, .26) 100%);
  pointer-events: none;
  z-index: 0;
}
.hero__inner {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  gap: 40px;
  padding-block: 68px 64px;
}
.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 9px 18px;
  border: 1px solid var(--line-2);
  border-radius: 100px;
  font-size: .75rem;
  letter-spacing: .06em;
  color: var(--fg-2);
  background: rgba(255, 255, 255, .12);
  margin-bottom: 26px;
}
.hero__badge b { color: var(--accent); font-weight: 700; }
.hero h1 {
  font-size: clamp(2.2rem, 4.4vw, 3.65rem);
  line-height: 1.18;
  letter-spacing: -.01em;
  margin-bottom: 24px;
}
.hero h1 em {
  font-style: normal;
  color: var(--accent);
  position: relative;
  white-space: nowrap;
}
.hero h1 em::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: .06em;
  height: .09em;
  background: var(--accent-line);
}
.hero__desc {
  max-width: 56ch;
  font-size: 1.0625rem;
  line-height: 1.9;
  color: var(--fg-2);
  margin-bottom: 36px;
}
.hero__acts { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 34px; }
.hero__facts {
  position: relative;
  z-index: 3;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 2px;
  overflow: hidden;
}
/* 按钮与数据看板之间的分隔细线 */
.hero__facts::before {
  content: "";
  position: absolute;
  left: 0; right: 0; top: -18px;
  height: 1px;
  background: linear-gradient(90deg,
    rgba(255, 255, 255, .62), rgba(255, 255, 255, .16) 82%, transparent);
}
.hero__fact { background: var(--bg); padding: 24px 26px; }
.hero__fact dt {
  font-family: var(--font-cond);
  font-size: 2.125rem;
  font-weight: 700;
  letter-spacing: .01em;
  color: #fff;
  line-height: 1.1;
}
.hero__fact dt span { font-size: .875rem; color: var(--accent); margin-left: 3px; }
.hero__fact dd {
  margin: 7px 0 0;
  font-size: .75rem;
  letter-spacing: .1em;
  color: var(--fg-mute);
  text-transform: uppercase;
  font-family: var(--font-mono);
}
.hero__copy { min-width: 0; }
.hero__art { position: relative; min-width: 0; }

/* 首屏产品实拍：透明底直接置于深色场景中。
   融入靠三件事：① 定向环境光（右上主光 + 左下补光）而非居中光晕
   ② 向左下偏移的柔和投影（与主光方向一致）③ 产品已做边缘轮廓光与压暗处理 */
.hero__shot {
  position: relative;
  padding: 0;
}
.hero__shot picture { position: relative; z-index: 2; display: block; }
/* 倒影：暗示产品立于深色抛光台面，同时稳住下半部构图 */
.hero__reflect {
  position: relative;
  z-index: 1;
  display: block;
  /* 父元素高度为 auto，百分比高度无效；用 aspect-ratio 限高，
     只取产品底部的一小段（约宽度的 22%），避免首屏过高 */
  aspect-ratio: 1180 / 58;
  overflow: hidden;
  margin-top: 2px;
  opacity: .16;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, .9) 0%, transparent 92%);
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, .9) 0%, transparent 92%);
}
.hero__reflect img {
  display: block;
  width: 100%;
  height: auto;
  transform: scaleY(-1);
  filter: blur(1.2px);
}
.hero__shot img {
  display: block;
  width: 100%;
  height: auto;
  filter: drop-shadow(0 10px 16px rgba(4, 10, 20, .5));
}
/* 投影：向左下偏移并虚化，暗示主光来自右上 */
.hero__shot::after {
  content: "";
  position: absolute;
  left: 12%; right: 18%; bottom: 2%;
  height: 14%;
  background: radial-gradient(50% 50% at 50% 50%, rgba(6, 20, 60, .40), rgba(6, 20, 60, .12) 58%, transparent 76%);
  filter: blur(16px);
  pointer-events: none;
  z-index: 0;
}
.hero__art-frame {
  position: relative;
  border: 1px solid var(--line);
  background: var(--plate-bg);
  padding: 18px;
}

.hero .watermark {
  top: 26px;
  left: -4px;
  font-size: clamp(3.4rem, 10vw, 8.5rem);
  opacity: .30;
  -webkit-text-stroke: 1px rgba(255, 255, 255, .34);
}

/* 品牌带 / 跑马灯 */
.marquee {
  overflow: hidden;
  border-block: 1px solid var(--line);
  background: var(--bg-2);
}
.marquee__track {
  display: flex;
  width: max-content;
  animation: slide 36s linear infinite;
}
.marquee:hover .marquee__track { animation-play-state: paused; }
.marquee__item {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  padding: 20px 34px;
  font-family: var(--font-cond);
  font-size: .9375rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--fg-dim);
  white-space: nowrap;
  border-right: 1px solid var(--line);
}
.marquee__item b { color: var(--accent); font-weight: 700; }
.marquee__item i {
  width: 5px; height: 5px; background: var(--line-2);
  transform: rotate(45deg); display: block; flex: none;
}
@keyframes slide { to { transform: translateX(-50%); } }

/* 能力/优势条目 */
.cap {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 20px;
  padding: 28px 0;
  border-top: 1px solid var(--line);
}
.cap:last-child { border-bottom: 1px solid var(--line); }
.cap__no {
  font-family: var(--font-cond);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  min-width: 46px;
}
.cap h3 { font-size: 1.0625rem; margin-bottom: 8px; }
.cap p { font-size: .9375rem; color: var(--fg-dim); line-height: 1.8; margin: 0; }

/* 数据看板 */
.metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.metric {
  background: var(--bg);
  padding: 34px 28px;
  position: relative;
  transition: background var(--t);
}
.metric:hover { background: var(--bg-3); }
.metric__num {
  font-family: var(--font-cond);
  font-size: clamp(2.2rem, 3.6vw, 3.1rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: .01em;
  color: var(--fg);
  display: flex;
  align-items: baseline;
  gap: 4px;
}
.metric__num i { font-style: normal; font-size: 1.1rem; color: var(--accent); }
.metric__label {
  margin-top: 12px;
  font-size: .8125rem;
  color: var(--fg-dim);
  letter-spacing: .04em;
}
.metric__en {
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: .625rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--fg-dim);
}
.metric::after {
  content: "";
  position: absolute;
  left: 28px; top: 0;
  width: 0; height: 3px;
  background: var(--accent);
  transition: width var(--t);
}
.metric:hover::after { width: 48px; }

/* 无边框看板变体（嵌在已有底色的区块内） */
.metrics--flat { border: 0; background: transparent; }
.metrics--flat .metric { background: transparent; }

/* CTA 带 */
.cta {
  position: relative;
  background:
    linear-gradient(120deg, #0A1424 0%, #102036 52%, #0A1424 100%);
  border-block: 1px solid var(--line);
  overflow: hidden;
}
.cta__inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.4fr auto;
  gap: 44px;
  align-items: center;
  padding-block: 68px;
}
.cta h2 { font-size: clamp(1.6rem, 2.6vw, 2.25rem); margin-bottom: 12px; }
.cta p { color: var(--fg-dim); max-width: 62ch; margin: 0; }
.cta__acts { display: flex; flex-wrap: wrap; gap: 14px; }
/* CTA 拨号块：4 个号码排成 2×2，避免与主按钮挤在一行 */
.cta__tels {
  display: grid;
  grid-template-columns: repeat(2, auto);
  gap: 6px 26px;
  align-content: center;
  font-family: var(--font-mono);
  font-size: .9375rem;
  letter-spacing: .04em;
}
.cta__tels a { color: var(--fg-2); transition: color var(--t); }
.cta__tels a:hover { color: var(--accent); }
@media (max-width: 560px) { .cta__tels { grid-template-columns: 1fr; } }

/* ------------------------------------------------------------- 08 组件 */
/* 卡片通用 */
.card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--card-line);
  border-radius: var(--r);
  box-shadow: var(--card-shadow);
  overflow: hidden;
  transition: transform var(--t), border-color var(--t), box-shadow var(--t), background var(--t);
}
.card__body { padding: 30px 30px 32px; }
.card h3 { margin-bottom: 10px; }
.card p { font-size: .9375rem; color: var(--fg-dim); line-height: 1.8; }
.card--hover:hover {
  transform: translateY(-6px);
  border-color: var(--line-2);
  box-shadow: var(--shadow);
}
.card--hover::before {
  content: "";
  position: absolute;
  left: 0; top: 0;
  width: 100%; height: 3px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t);
  z-index: 3;
}
.card--hover:hover::before { transform: none; }
.card--pad { padding: 34px 32px 36px; }
.card--flush .card__body { padding-top: 24px; }

/* 图标块 */
.ico {
  width: 52px; height: 52px;
  display: grid; place-items: center;
  border: 1px solid var(--accent-line);
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: var(--r);
  margin-bottom: 20px;
  transition: background var(--t), color var(--t);
}
.ico svg { width: 24px; height: 24px; }
.card--hover:hover .ico { background: var(--accent-solid); color: var(--accent-on); }

/* 产品卡片 */
.prod-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.prod {
  display: flex;
  flex-direction: column;
  background: var(--card);
  border: 1px solid var(--card-line);
  border-radius: var(--r);
  box-shadow: var(--card-shadow);
  overflow: hidden;
  position: relative;
  transition: transform var(--t), border-color var(--t), box-shadow var(--t);
}
.prod:hover { transform: translateY(-6px); border-color: var(--accent-line); box-shadow: var(--shadow); }
.prod__media {
  position: relative;
  background: var(--bg-2);
  border-bottom: 1px solid var(--card-line);
  overflow: hidden;
}
.prod__media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  transition: transform .6s cubic-bezier(.22, .61, .36, 1);
}
.prod:hover .prod__media img { transform: scale(1.04); }
/* 系列代号牌：浅色图版上使用淡蓝底 + 品牌蓝字，保证对比度 */
.prod__code {
  position: absolute;
  top: 14px; left: 14px;
  padding: 5px 11px;
  background: rgba(255, 255, 255, .84);
  border: 1px solid var(--accent-line);
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .14em;
  color: var(--accent);
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
}
.prod__body { padding: 24px 26px 26px; display: flex; flex-direction: column; flex: 1; }
.prod__cat {
  font-family: var(--font-mono);
  font-size: .625rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin-bottom: 10px;
}
.prod__body h3 { font-size: 1.125rem; margin-bottom: 10px; }
.prod__desc {
  font-size: .875rem;
  color: var(--fg-dim);
  line-height: 1.8;
  margin-bottom: 20px;
  flex: 1;
}
.prod__specs {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-bottom: 20px;
}
.prod__spec { background: var(--card); padding: 11px 13px; }
.prod__spec dt {
  font-family: var(--font-mono);
  font-size: .5625rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin-bottom: 3px;
}
.prod__spec dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .8125rem;
  color: var(--fg);
}
/* margin-top:auto 把行动链接推到卡片底部 —— 各卡参数条数不同，
   没有它「查看参数详情 / 索取规格与报价」会停在不同高度，同一排参差不齐 */
.prod__more {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: 18px;
  border-top: 1px dashed var(--line);
  font-size: .8125rem;
  font-weight: 600;
  color: var(--accent);
}
.prod__more svg { transition: transform var(--t); }
.prod:hover .prod__more svg { transform: translateX(6px); }

/* 规格表 */
.spec-table { font-size: .875rem; }
.spec-table caption {
  text-align: left;
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--accent);
  padding-bottom: 14px;
}
.spec-table th, .spec-table td {
  padding: 14px 18px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
.spec-table thead th {
  font-family: var(--font-mono);
  font-size: .6875rem;
  font-weight: 400;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--fg-dim);
  border-bottom: 1px solid var(--line-2);
  background: var(--bg-2);
  white-space: nowrap;
}
.spec-table tbody th {
  font-weight: 600;
  color: var(--fg-2);
  width: 30%;
  white-space: nowrap;
}
.spec-table td { font-family: var(--font-mono); color: var(--fg); }
.spec-table tbody tr:hover { background: var(--bg-2); }
.spec-table--plain tbody th { font-family: var(--font-sans); }

/* 标签页 */
.tabs { position: relative; }
.tabs__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 34px;
}
.tabs__btn {
  position: relative;
  padding: 14px 24px;
  font-size: .875rem;
  font-weight: 600;
  color: var(--fg-dim);
  transition: color var(--t), background var(--t);
}
.tabs__btn:hover { color: var(--fg); background: var(--bg-2); }
.tabs__btn[aria-selected="true"] { color: var(--accent); }
.tabs__btn[aria-selected="true"]::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 2px;
  background: var(--accent);
}
.tabs__panel[hidden] { display: none; }

/* 手风琴 */
.acc { border-top: 1px solid var(--line); }
.acc__item { border-bottom: 1px solid var(--line); }
.acc__q {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  width: 100%;
  padding: 22px 4px;
  text-align: left;
  font-size: 1rem;
  font-weight: 600;
  color: var(--fg);
  transition: color var(--t);
}
.acc__q:hover { color: var(--accent); }
.acc__sign {
  position: relative;
  width: 18px; height: 18px;
  flex: none;
  margin-top: 5px;
}
.acc__sign::before, .acc__sign::after {
  content: "";
  position: absolute;
  background: var(--accent);
  transition: transform var(--t), opacity var(--t);
}
.acc__sign::before { left: 0; right: 0; top: 8px; height: 2px; }
.acc__sign::after { top: 0; bottom: 0; left: 8px; width: 2px; }
.acc__item.is-open .acc__sign::after { transform: scaleY(0); opacity: 0; }
.acc__a {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--t);
}
.acc__item.is-open .acc__a { grid-template-rows: 1fr; }
.acc__a > div { overflow: hidden; }
.acc__a p { padding: 0 56px 24px 4px; color: var(--fg-dim); font-size: .9375rem; line-height: 1.9; margin: 0; }

/* 时间轴 */
.tl { position: relative; padding-left: 30px; }
.tl::before {
  content: "";
  position: absolute;
  left: 5px; top: 6px; bottom: 6px;
  width: 1px;
  background: var(--line);
}
.tl__item { position: relative; padding-bottom: 38px; }
.tl__item:last-child { padding-bottom: 0; }
.tl__item::before {
  content: "";
  position: absolute;
  left: -30px; top: 7px;
  width: 11px; height: 11px;
  background: var(--bg);
  border: 2px solid var(--accent);
  border-radius: 50%;
}
.tl__year {
  font-family: var(--font-cond);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--accent);
  margin-bottom: 6px;
}
.tl__item h4 { font-size: 1rem; margin-bottom: 6px; }
.tl__item p { font-size: .9375rem; color: var(--fg-dim); line-height: 1.8; margin: 0; }

/* 新闻 */

/* 列表页条目 */
.post {
  display: grid;
  grid-template-columns: 150px 1fr auto;
  gap: 34px;
  align-items: center;
  padding: 30px 6px;
  border-bottom: 1px solid var(--line);
  transition: background var(--t), padding-left var(--t);
}
.post:first-of-type { border-top: 1px solid var(--line); }
.post:hover { background: var(--bg-2); padding-left: 16px; }
.post__date { font-family: var(--font-mono); font-size: .8125rem; color: var(--fg-mute); }
.post__date b {
  display: block;
  font-family: var(--font-cond);
  font-size: 1.5rem;
  color: var(--fg);
  font-weight: 700;
  letter-spacing: .04em;
}
.post h3 { font-size: 1.125rem; margin-bottom: 8px; transition: color var(--t); }
.post:hover h3 { color: var(--accent); }
.post p { font-size: .875rem; color: var(--fg-dim); margin: 0; max-width: 78ch; }
.post__go {
  width: 46px; height: 46px;
  display: grid; place-items: center;
  border: 1px solid var(--line-2);
  color: var(--fg-dim);
  flex: none;
  transition: all var(--t);
}
.post:hover .post__go { background: var(--accent-solid); border-color: var(--accent-solid); color: var(--accent-on); }

/* 分页 */
.pager { display: flex; justify-content: center; gap: 8px; margin-top: 48px; }
.pager a, .pager span {
  min-width: 44px; height: 44px;
  display: grid; place-items: center;
  padding: 0 14px;
  font-family: var(--font-mono);
  font-size: .8125rem;
  color: var(--fg-dim);
  border: 1px solid var(--line);
  border-radius: var(--r);
  transition: all var(--t);
}
.pager a:hover { color: var(--fg); border-color: var(--line-2); }
.pager .is-on { background: var(--accent-solid); border-color: var(--accent-solid); color: var(--accent-on); }

/* 文章正文 */
.article { font-size: 1.0625rem; line-height: 2; color: var(--fg-2); }
.article > * + * { margin-top: 1.35em; }
.article h2 { font-size: 1.5rem; margin-top: 2.2em; color: var(--fg); }
.article h3 { font-size: 1.1875rem; margin-top: 1.9em; color: var(--fg); }
.article ul { display: grid; gap: 12px; padding-left: 0; }
.article ul li { position: relative; padding-left: 26px; }
.article ul li::before {
  content: "";
  position: absolute;
  left: 4px; top: .78em;
  width: 8px; height: 2px;
  background: var(--accent);
}
.article ol { counter-reset: n; display: grid; gap: 12px; }
.article ol li { position: relative; padding-left: 34px; counter-increment: n; }
.article ol li::before {
  content: counter(n, decimal-leading-zero);
  position: absolute;
  left: 0; top: .1em;
  font-family: var(--font-mono);
  font-size: .8125rem;
  color: var(--accent);
}
.article blockquote {
  margin: 1.8em 0;
  padding: 22px 26px;
  background: var(--bg-2);
  border-left: 3px solid var(--accent);
  color: var(--fg-2);
  font-size: 1rem;
}
.article img { border: 1px solid var(--line); }

/* 图注 */
.figcap {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .1em;
  color: var(--fg-mute);
  text-transform: uppercase;
}

/* 媒体外框 */
/* 图片外框：产品结构图已改为浅底目录图，外框固定用浅色图版，
   即使位于深色区块（如产品详情页首屏）也能与实拍白底产品照自然衔接 */
.frame {
  position: relative;
  border: 1px solid rgba(16, 32, 54, .12);
  background: linear-gradient(165deg, #FFFFFF 0%, #E7EEF7 100%);
  padding: 16px;
}
.frame--flush { padding: 0; }
/* 深色区块内的图框：原理图是浅线深底，需配深色图版 */
.frame--dark {
  background: linear-gradient(165deg, #122032 0%, #0A1322 100%);
  border-color: rgba(255, 255, 255, .12);
}





/* ---------- 锚点跳转补偿：吸顶导航会遮住目标标题 ---------- */
[id] { scroll-margin-top: calc(var(--nav-h, 78px) + 22px); }
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}




/* ================================================================
   产品照与产品详情页
   ⚠️ 产品照是**白底棚拍图**，未抠图。
   .prod__media 原来用 var(--bg-2)（浅蓝灰），白底图压上去会露出一个白框，
   故卡片媒体区改为纯白 + 固定比例 contain，保证一排卡片高度一致。
   ================================================================ */
.prod__media {
  background: #fff;
  aspect-ratio: 4 / 3;
  display: grid;
  place-items: center;
  padding: 10px;
}
.prod__media img { width: 100%; height: 100%; object-fit: contain; }
.prod__media picture { display: contents; }

/* 详情页：主图 + 速览 */
.pdet { display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(0, 1fr); gap: 52px; align-items: start; }
.pdet__tag {
  display: inline-block;
  margin-bottom: 14px;
  padding: 5px 12px;
  border: 1px solid var(--accent-line);
  background: rgba(47, 99, 214, .1);
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .16em;
  color: var(--accent);
}
.pdet__figure {
  margin: 0;
  background: #fff;
  border: 1px solid var(--card-line);
  border-radius: var(--r);
  box-shadow: var(--card-shadow);
  overflow: hidden;
}
.pdet__figure img { display: block; width: 100%; height: auto; }
.pdet__cap {
  padding: 13px 20px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .12em;
  color: var(--fg-mute);
  background: var(--bg-2);
}
.pdet__side { display: grid; gap: 26px; }
.pdet__quick { border: 1px solid var(--card-line); border-radius: var(--r); background: var(--card); padding: 26px 26px 8px; }
.pdet__facts { display: grid; gap: 0; margin: 16px 0 0; }
.pdet__facts > div {
  display: grid;
  grid-template-columns: minmax(90px, 34%) 1fr;
  gap: 16px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
}
.pdet__facts dt { font-family: var(--font-mono); font-size: .6875rem; letter-spacing: .1em; color: var(--fg-mute); }
.pdet__facts dd { margin: 0; font-size: .875rem; color: var(--fg); line-height: 1.7; word-break: break-word; }
.pdet__acts { display: flex; flex-wrap: wrap; gap: 12px; }
.pdet__notice { margin: 0; }

/* 参数明细 */
.pspec-grid { display: grid; /* min() 兜底：视口窄于 356px 时轨道不再被 320px 撑破 */
  grid-template-columns: repeat(auto-fit, minmax(min(320px, 100%), 1fr)); gap: 24px; align-items: start; }
.pspec { border: 1px solid var(--card-line); border-radius: var(--r); background: var(--card); overflow: hidden; }
.pspec__head { display: flex; align-items: baseline; gap: 12px; padding: 18px 22px; border-bottom: 1px solid var(--line); background: var(--bg-2); }
.pspec__no { font-family: var(--font-cond); font-size: 1.375rem; font-weight: 700; color: var(--accent); line-height: 1; }
.pspec__head h3 { font-size: 1.0625rem; margin: 0; }
.pspec__en { font-family: var(--font-mono); font-size: .625rem; letter-spacing: .16em; text-transform: uppercase; color: var(--fg-mute); margin-left: auto; }
.pspec__table { display: grid; }
.pspec__row { display: grid; grid-template-columns: minmax(84px, 36%) 1fr; gap: 16px; padding: 13px 22px; border-top: 1px solid var(--line); }
.pspec__row:first-child { border-top: 0; }
.pspec__row dt { font-size: .8125rem; color: var(--fg-dim); }
/* 表格型小节里没有 key 的条目：整行显示（原先这类条目被丢弃） */
.pspec__row--full { grid-template-columns: 1fr; }
.pspec__row--full dd { color: var(--fg-dim); }
.pspec__row dd { margin: 0; font-family: var(--font-mono); font-size: .8125rem; color: var(--fg); word-break: break-word; }
.pspec__list { margin: 0; padding: 0; list-style: none; }
.pspec__list li { display: grid; grid-template-columns: minmax(84px, 36%) 1fr; gap: 16px; padding: 13px 22px; border-top: 1px solid var(--line); font-size: .8125rem; }
.pspec__list li:first-child { border-top: 0; }
.pspec__list li::before { content: none; }
.pspec__list b { font-weight: 500; color: var(--fg-dim); }
.pspec__list span { color: var(--fg); word-break: break-word; }
.pspec__list li.pspec__plain { grid-template-columns: 1fr; position: relative; padding-left: 40px; }
.pspec__list li.pspec__plain::after {
  content: "";
  position: absolute;
  left: 22px; top: 21px;
  width: 6px; height: 6px;
  background: var(--accent);
  transform: rotate(45deg);
}

/* 相关产品 */
.prel-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.prel {
  display: grid;
  grid-template-areas: "media" "cat" "name";
  background: var(--card);
  border: 1px solid var(--card-line);
  border-radius: var(--r);
  overflow: hidden;
  transition: transform var(--t), border-color var(--t), box-shadow var(--t);
}
.prel:hover { transform: translateY(-4px); border-color: var(--accent-line); box-shadow: var(--card-shadow); }
.prel__media { grid-area: media; display: block; background: #fff; aspect-ratio: 4 / 3; padding: 10px; }
.prel__media img { width: 100%; height: 100%; object-fit: contain; display: block; }
.prel__cat { grid-area: cat; padding: 16px 20px 0; font-family: var(--font-mono); font-size: .625rem; letter-spacing: .16em; color: var(--fg-mute); }
.prel__name { grid-area: name; padding: 6px 20px 20px; font-size: .9375rem; font-weight: 600; color: var(--fg); line-height: 1.5; }
.prel__go { display: none; }

@media (max-width: 1080px) {
  .pdet { grid-template-columns: 1fr; gap: 36px; }
  .prel-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .prel-grid { grid-template-columns: 1fr; }
  .pspec__row, .pspec__list li { grid-template-columns: 1fr; gap: 4px; }
}



/* ---------- 移动端抽屉：产品中心按系列分组（与网页端 mega 面板一致） ---------- */
.drawer__series + .drawer__series { border-top: 1px solid var(--line); }
/* 系列头要覆盖 .drawer__panel a 的左侧竖线样式 */
.drawer__panel .drawer__series-head {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 13px 0 7px;
  border-left: 0;
  font-size: .875rem;
  font-weight: 700;
  color: #E4EBF4;
}
.drawer__panel .drawer__series-head:hover { color: var(--accent); border-left: 0; }
.drawer__panel .drawer__series-head .sub__count { margin-left: auto; }
.drawer__series a { /* 组内产品链接保持小字与左缩进 */ }

/* ---------- 产品中心 mega 下拉（4 系列 × 全部产品） ---------- */
.sub--mega { width: min(1060px, 88vw); }
.sub__grid--mega {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0 30px;
  align-items: start;
}
.sub__col { display: grid; align-content: start; gap: 1px; min-width: 0; }
.sub__head {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 4px 10px 12px;
  margin-bottom: 8px;
  border-bottom: 1px solid rgba(255, 255, 255, .1);
}
.sub__hname {
  font-size: .875rem;
  font-weight: 700;
  color: #EAF2FC;
  line-height: 1.35;
}
.sub__head:hover .sub__hname { color: var(--accent); }
.sub__count {
  margin-left: auto;
  padding: 1px 7px;
  border-radius: 999px;
  background: rgba(107, 166, 255, .14);
  font-family: var(--font-mono);
  font-size: .625rem;
  color: var(--accent);
  flex: none;
}
.sub__item {
  padding: 6px 10px;
  border-radius: var(--r);
  font-size: .75rem;
  line-height: 1.5;
  color: #96A6BC;
  transition: background var(--t), color var(--t);
}
.sub__item:hover { background: rgba(107, 166, 255, .12); color: #fff; }

/* 窄屏回到两列，避免面板顶到视口边缘 */
@media (max-width: 1180px) {
  .sub--mega { width: min(720px, 92vw); }
  .sub__grid--mega { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px 26px; }
}

/* 灯箱图片高度用 dvh 并保留 vh 回退：移动端地址栏收起/展开会让 100vh 计算失真 */

/* ---------- 触控目标：小屏下保证 ≥44px（审计 A3） ---------- */
@media (max-width: 1040px) {
  .burger { height: 46px; }
  .drawer__close { width: 44px; height: 44px; }
  .drawer__panel a { padding: 11px 0 11px 14px; }
  .lb__close { width: 44px; height: 44px; }
  .lb__nav { width: 46px; }
  .ftr__links { gap: 12px; }
  .ftr__links a { padding-block: 5px; }
  .cta__tels a { padding-block: 5px; }
  .tlink { padding-block: 5px; }
  .crumb a { padding-block: 4px; }
}
@media (max-width: 1040px) {
  .filter { padding-block: 12px; }
}

/* ---------- 页脚备案徽标（官方原图 18×18，勿改尺寸比例） ---------- */
/* 备案徽标：站点有一条全局规则 `img, svg, video { display: block }`，
   会把图标变成块级、独占一行并把备案号挤到下一行 —— 必须显式改回行内级。 */
.beian-ico {
  display: inline-block;
  width: 18px;
  height: 18px;
  vertical-align: -4px;
  margin-right: 5px;
  border: 0;
}
/* 图标与备案号是不可拆的整体 */
.ftr__beian { white-space: nowrap; }
.ftr__barlinks > a { white-space: nowrap; }

/* ---------- 首页项目实景跑马灯（两行反向滚动） ---------- */
/* 用 flex + gap 控制行距，比给第二行加 margin 更稳（不受外边距折叠影响） */
.casemq { display: flex; flex-direction: column; gap: 16px; overflow: hidden; padding-block: 6px; }
.casemq__row { overflow: hidden; }
.casemq__row {
  /* 行两侧渐隐，避免进出画面生硬 */
  -webkit-mask-image: linear-gradient(90deg, transparent 0, #000 5%, #000 95%, transparent 100%);
  mask-image: linear-gradient(90deg, transparent 0, #000 5%, #000 95%, transparent 100%);
}
.casemq__track { gap: 16px; animation-duration: 68s; }
.casemq__track--rev { animation-direction: reverse; animation-duration: 82s; }
.casemq:hover .casemq__track { animation-play-state: paused; }

.casemq__item {
  display: block;
  flex: none;
  height: 208px;
  border: 1px solid var(--card-line);
  border-radius: var(--r);
  overflow: hidden;
  background: var(--card-2);
  transition: border-color var(--t), box-shadow var(--t);
}
.casemq__item img {
  display: block;
  height: 100%;
  width: auto;
  transition: transform .55s cubic-bezier(.22,.61,.36,1);
}
.casemq__item:hover { border-color: var(--accent-line); box-shadow: var(--card-shadow); }
.casemq__item:hover img { transform: scale(1.045); }
.casemq__item:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.casemq__foot { margin-top: 28px; text-align: center; }

@media (max-width: 900px) { .casemq__item { height: 168px; } .casemq__track { gap: 12px; } }
@media (max-width: 560px) { .casemq__item { height: 132px; } .casemq { gap: 10px; } }

/* 减弱动效时：停掉滚动，改为可横向滑动查看 */
@media (prefers-reduced-motion: reduce) {
  .casemq__row { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .casemq__track { animation: none !important; }
}

/* ---------- 项目实景画廊（masonry，横竖混排）+ 灯箱 ---------- */
.gallery { columns: 4; column-gap: 14px; }
@media (max-width: 1180px) { .gallery { columns: 3; } }
@media (max-width: 820px)  { .gallery { columns: 2; } }
@media (max-width: 480px)  { .gallery { columns: 1; } }

.gallery__item { break-inside: avoid; margin: 0 0 14px; }

.gallery__btn {
  position: relative;
  display: block;
  width: 100%;
  padding: 0;
  border: 1px solid var(--card-line);
  border-radius: var(--r);
  background: var(--card-2);
  cursor: zoom-in;
  overflow: hidden;
  -webkit-tap-highlight-color: transparent;
}
.gallery__btn img {
  display: block;
  width: 100%;
  height: auto;
  transition: transform .55s cubic-bezier(.22,.61,.36,1), opacity .5s ease;
}
.gallery__btn:hover img,
.gallery__btn:focus-visible img { transform: scale(1.045); }
.gallery__btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* hover 蒙层 + 放大镜 */
.gallery__btn::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11,21,36,0) 45%, rgba(11,21,36,.42) 100%);
  opacity: 0;
  transition: opacity var(--t);
  pointer-events: none;
}
.gallery__btn:hover::after { opacity: 1; }

.gallery__zoom {
  position: absolute;
  right: 10px; bottom: 10px;
  width: 30px; height: 30px;
  border-radius: 50%;
  background: rgba(255,255,255,.92);
  opacity: 0;
  transform: translateY(6px);
  transition: opacity var(--t), transform var(--t);
  pointer-events: none;
}
.gallery__zoom::before,
.gallery__zoom::after {
  content: "";
  position: absolute;
  left: 50%; top: 50%;
  background: #0B1524;
  transform: translate(-50%,-50%);
}
.gallery__zoom::before { width: 12px; height: 2px; }
.gallery__zoom::after  { width: 2px;  height: 12px; }
.gallery__btn:hover .gallery__zoom,
.gallery__btn:focus-visible .gallery__zoom { opacity: 1; transform: none; }

.gallery__foot {
  margin-top: 26px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .1em;
  color: var(--fg-mute);
}

/* 灯箱 */
.lb {
  position: fixed;
  inset: 0;
  z-index: 120;
  /* 舞台居中；翻页按钮绝对定位贴边 —— 不依赖 DOM 顺序，避免列错配 */
  display: grid;
  place-items: center;
  padding: 64px 88px 44px;
  background: rgba(6, 12, 22, .94);
  backdrop-filter: blur(3px);
}
.lb[hidden] { display: none; }
.lb__stage {
  margin: 0;
  max-width: min(1400px, 100%);
  max-height: 100%;
  display: flex; flex-direction: column; align-items: center; gap: 12px;
}
.lb__img {
  max-width: 100%;
  max-height: calc(100vh - 148px);
  max-height: calc(100dvh - 148px);
  width: auto; height: auto;
  border-radius: 4px;
  box-shadow: 0 40px 90px -40px rgba(0,0,0,.9);
}
.lb__cap { font-family: var(--font-mono); font-size: .75rem; letter-spacing: .12em; color: #9FB3CC; }
.lb__close,
.lb__nav {
  border: 1px solid rgba(255,255,255,.16);
  background: rgba(255,255,255,.06);
  color: #EAF2FC;
  cursor: pointer;
  transition: background var(--t), border-color var(--t);
}
.lb__close {
  position: absolute; top: 16px; right: 18px;
  width: 42px; height: 42px; border-radius: 50%;
  font-size: 1rem; line-height: 1;
}
.lb__nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px; height: 76px; border-radius: 8px;
  font-size: 1.9rem; line-height: 1;
}
.lb__nav--prev { left: 22px; }
.lb__nav--next { right: 22px; }
.lb__close:hover, .lb__nav:hover { background: rgba(255,255,255,.14); border-color: rgba(255,255,255,.34); }
.lb__close:focus-visible, .lb__nav:focus-visible { outline: 2px solid #5B9BFF; outline-offset: 2px; }
body.is-lb-open { overflow: hidden; }

@media (max-width: 720px) {
  .lb { padding: 56px 56px 32px; }
  .lb__nav { width: 40px; height: 60px; font-size: 1.5rem; }
  .lb__nav--prev { left: 6px; }
  .lb__nav--next { right: 6px; }
  .lb__img { max-height: calc(100vh - 170px); max-height: calc(100dvh - 170px); }
}
/* ---------- 技术支持页：要点列表 / 带序号步骤列表 ---------- */
.metalist { list-style: none; margin: 0; padding: 0; }
.metalist li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 10px;
  font-size: .875rem;
  line-height: 1.7;
  color: var(--fg-2);
}
.metalist li:last-child { margin-bottom: 0; }
.metalist li::before {
  content: "";
  position: absolute;
  left: 2px; top: .62em;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.numlist { list-style: none; counter-reset: n; margin: 0; padding: 0; }
.numlist li {
  position: relative;
  counter-increment: n;
  padding-left: 38px;
  margin-bottom: 13px;
  font-size: .875rem;
  line-height: 1.7;
  color: var(--fg-2);
}
.numlist li:last-child { margin-bottom: 0; }
.numlist li::before {
  content: counter(n, decimal-leading-zero);
  position: absolute;
  left: 0; top: .12em;
  padding: 1px 6px;
  font-family: var(--font-mono);
  font-size: .75rem;
  line-height: 1.5;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--accent-line);
  border-radius: 3px;
}

/* ---------- CNC 等轴测示意图动效（等轴测旋转用椭圆缩放的视觉约定） ---------- */
.cnc-spin { animation: cncspin .9s linear infinite; }
@keyframes cncspin { 0%, 100% { transform: scaleX(1); } 50% { transform: scaleX(.16); } }

.cnc-mag { animation: cncspin 5.4s linear infinite; }

.cnc-table { animation: cnctable 7s ease-in-out infinite; }
@keyframes cnctable {
  0%, 100% { transform: translate(0, 0); }
  26%      { transform: translate(13px, 7.5px); }
  54%      { transform: translate(-9px, -5.2px); }
  78%      { transform: translate(6px, 3.5px); }
}

.cnc-head { animation: cncHead 5.6s ease-in-out infinite; }
@keyframes cncHead {
  0%, 100% { transform: translateY(0); }
  42%      { transform: translateY(13px); }
  62%      { transform: translateY(4px); }
}

.cnc-spark { animation: cncspark .28s steps(2, end) infinite; }
@keyframes cncspark { 0% { opacity: .25; } 50% { opacity: 1; } 100% { opacity: .45; } }

.cnc-chip { animation: cncchip 2.6s ease-out infinite; }
@keyframes cncchip {
  0%   { opacity: 0; transform: translate(0, 0) scale(.4); }
  12%  { opacity: 1; }
  100% { opacity: 0; transform: translate(-14px, 20px) scale(1); }
}

/* 01 集中供气系统备用版式：六道工序格（配 DXF 大样图）。
   当前 01 栏目用的是「左文右图 + 等轴测示意图」，本组样式暂未启用，保留以便切换。 */
.gas-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 30px 26px;
}
.gas-item { display: flex; flex-direction: column; gap: 18px; }
.gas-item__fig {
  /* 用 flex 而非 grid：grid 下行为 auto 高度，img 的 height:100% 解析不出定值，
     正方形 SVG 会按固有尺寸撑开并溢出格子 */
  display: flex;
  align-items: center;
  justify-content: center;
  height: 190px;
  overflow: hidden;
  padding: 12px 16px;
  border: 1px solid var(--card-line);
  border-radius: var(--r);
  background: linear-gradient(168deg, #FFFFFF 0%, #EAF1F9 100%);
  transition: border-color var(--t), box-shadow var(--t);
}
.gas-item:hover .gas-item__fig { border-color: var(--accent-line); box-shadow: var(--card-shadow); }
.gas-item__fig img { display: block; width: 100%; height: 100%; object-fit: contain; }
@media (max-width: 1024px) { .gas-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 640px) { .gas-grid { grid-template-columns: 1fr; } .gas-item__fig { height: 168px; } }

/* 联系块 */
.cinfo { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); }
.cinfo__row {
  background: var(--card);
  padding: 26px 28px;
  display: grid;
  grid-template-columns: 46px 1fr;
  gap: 20px;
  align-items: start;
  transition: background var(--t);
}
.cinfo__row:hover { background: var(--bg-3); }
.cinfo__ico {
  width: 46px; height: 46px;
  display: grid; place-items: center;
  border: 1px solid var(--accent-line);
  color: var(--accent);
  background: var(--accent-soft);
}
.cinfo__ico svg { width: 20px; height: 20px; }
.cinfo h4 {
  font-family: var(--font-mono);
  font-size: .6875rem;
  font-weight: 400;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin-bottom: 8px;
}
.cinfo p { margin: 0; font-size: .9375rem; color: var(--fg-2); line-height: 1.8; }
.cinfo b { font-size: 1.125rem; color: var(--fg); font-family: var(--font-cond); letter-spacing: .04em; }

/* 地图牌（离线矢量替代方案） */
.map-plate {
  position: relative;
  border: 1px solid var(--line);
  background: linear-gradient(150deg, #FFFFFF, #E7EEF7);
  overflow: hidden;
  min-height: 380px;
}
.map-plate__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(16, 32, 54, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 32, 54, .07) 1px, transparent 1px);
  background-size: 40px 40px;
}
.map-plate__road {
  position: absolute;
  background: rgba(16, 32, 54, .10);
}
.map-plate__pin {
  position: absolute;
  left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
}
.map-plate__pin i {
  display: block;
  width: 16px; height: 16px;
  margin: 0 auto 14px;
  background: var(--accent);
  border-radius: 50% 50% 50% 0;
  transform: rotate(-45deg);
  box-shadow: 0 0 0 8px rgba(0, 84, 200, .16), 0 0 0 18px rgba(0, 84, 200, .07);
}
.map-plate__pin span {
  display: inline-block;
  padding: 8px 16px;
  background: rgba(11, 21, 36, .92);
  border: 1px solid var(--line-2);
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .08em;
  line-height: 1.65;
  color: #EAF1FA;
  /* 地址较长，允许换行并限宽，避免窄屏溢出被裁切 */
  max-width: min(88%, 460px);
  white-space: normal;
}
.map-plate__note {
  position: absolute;
  left: 20px; bottom: 18px;
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .1em;
  color: var(--fg-mute);
}

/* 流程链（解决方案） */
.flow {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.flow__node {
  position: relative;
  background: var(--card);
  padding: 26px 22px 28px;
  transition: background var(--t);
}
.flow__node:hover { background: var(--bg-3); }
.flow__no {
  font-family: var(--font-mono);
  font-size: .625rem;
  letter-spacing: .18em;
  color: var(--accent);
  margin-bottom: 14px;
}
.flow__node h4 { font-size: .9375rem; margin-bottom: 8px; }
.flow__node p { font-size: .8125rem; color: var(--fg-dim); line-height: 1.75; margin: 0; }
.flow__node::after {
  content: "";
  position: absolute;
  right: -7px; top: 50%;
  width: 12px; height: 12px;
  margin-top: -6px;
  border-top: 1.6px solid var(--accent);
  border-right: 1.6px solid var(--accent);
  transform: rotate(45deg);
  background: var(--bg);
  z-index: 2;
}
.flow__node:last-child::after { display: none; }

/* 认证牌 */
.certs { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.cert {
  padding: 26px 24px;
  background: var(--card);
  border: 1px solid var(--card-line);
  border-radius: var(--r);
  box-shadow: var(--card-shadow);
  position: relative;
  transition: border-color var(--t), transform var(--t);
}
.cert:hover { border-color: var(--accent-line); transform: translateY(-4px); }
.cert::before, .cert::after {
  content: "";
  position: absolute;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--line-2);
}
.cert::before { top: 10px; right: 10px; }
.cert::after { bottom: 10px; left: 10px; }
.cert__std {
  font-family: var(--font-cond);
  font-size: 1.375rem;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--fg);
  margin-bottom: 8px;
}
.cert p { font-size: .8125rem; color: var(--fg-dim); margin: 0; line-height: 1.7; }

/* 侧栏 */
.aside-card {
  background: var(--card);
  border: 1px solid var(--card-line);
  border-radius: var(--r);
  box-shadow: var(--card-shadow);
  padding: 28px 26px;
}
.aside-card + .aside-card { margin-top: 22px; }
.aside-card h3 {
  font-size: 1rem;
  padding-bottom: 14px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--line);
}
.aside-nav { display: grid; gap: 2px; }
.aside-nav a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  font-size: .875rem;
  color: var(--fg-dim);
  border-left: 2px solid transparent;
  transition: all var(--t);
}
.aside-nav a:hover { color: var(--fg); background: var(--bg-2); }
.aside-nav a.is-on { color: var(--accent); border-left-color: var(--accent); background: var(--accent-soft); }
.sticky { position: sticky; top: calc(var(--nav-h) + 24px); }

/* -------------------------------------------------------------- 09 表单 */
.form { display: grid; gap: 22px; }
.form__row { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.field { display: grid; gap: 9px; }
.field > label {
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--fg-2);
}
.field > label i { color: var(--accent); font-style: normal; }
.input, .select, .textarea {
  width: 100%;
  padding: 14px 16px;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--r);
  color: var(--fg);
  font-size: .9375rem;
  transition: border-color var(--t), background var(--t), box-shadow var(--t);
  -webkit-appearance: none;
  appearance: none;
}
.input::placeholder, .textarea::placeholder { color: var(--fg-mute); }
.input:focus, .select:focus, .textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: var(--bg-3);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.textarea { min-height: 148px; resize: vertical; line-height: 1.7; }
.select {
  background-image: linear-gradient(45deg, transparent 50%, var(--fg-dim) 50%), linear-gradient(135deg, var(--fg-dim) 50%, transparent 50%);
  background-position: calc(100% - 20px) calc(50% + 2px), calc(100% - 15px) calc(50% + 2px);
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  padding-right: 44px;
}
.field.has-error .input, .field.has-error .select, .field.has-error .textarea { border-color: var(--warn); }
.field__msg { font-size: .75rem; color: var(--warn); display: none; }
.field.has-error .field__msg { display: block; }
.check { display: flex; align-items: flex-start; gap: 11px; font-size: .8125rem; color: var(--fg-dim); }
.check input { width: 18px; height: 18px; margin-top: 3px; accent-color: var(--accent); flex: none; }
.check a { color: var(--accent); border-bottom: 1px solid var(--accent-line); }
.form__foot { display: flex; flex-wrap: wrap; align-items: center; gap: 20px; }

.toast {
  position: fixed;
  left: 50%;
  bottom: 34px;
  transform: translate(-50%, 24px);
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 22px;
  background: var(--card);
  border: 1px solid var(--card-line);
  border-left: 3px solid var(--accent);
  box-shadow: var(--shadow);
  font-size: .875rem;
  color: var(--fg);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--t), transform var(--t), visibility var(--t);
  z-index: 200;
  max-width: min(560px, 90vw);
}
.toast.is-on { opacity: 1; visibility: visible; transform: translate(-50%, 0); }
.toast b { color: var(--accent); }

/* 温馨提示条 */
.notice {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
  padding: 22px 24px;
  background: var(--accent-soft);
  border: 1px solid var(--accent-line);
  border-left-width: 3px;
  border-radius: var(--r);
  font-size: .875rem;
  color: var(--fg-2);
}
.notice svg { width: 20px; height: 20px; color: var(--accent); margin-top: 3px; }

/* Hero 工程图纸（P&ID 节选）动效 */
.pid { width: 100%; height: auto; display: block; }
.pid text { font-family: var(--font-mono); }
.pid-flow { animation: pidflow 1.5s linear infinite; }
@keyframes pidflow { to { stroke-dashoffset: -32; } }
/* 原理示意图（浅底图纸）动效 —— 全部走 CSS，prefers-reduced-motion 下由全局规则统一关闭 */
.pid-needle { transform-box: view-box; animation: pidneedle 5s ease-in-out infinite; }
@keyframes pidneedle { 0%, 100% { transform: rotate(-14deg); } 50% { transform: rotate(14deg); } }

.pid-badge { transform-box: fill-box; transform-origin: center; animation: pidbadge 9s ease-in-out infinite; }
@keyframes pidbadge {
  0%     { transform: scale(1);    opacity: .45; }
  2.5%   { transform: scale(1.45); opacity: 1; }
  9%     { transform: scale(1.12); opacity: .95; }
  16.66% { transform: scale(1);    opacity: .45; }
  100%   { transform: scale(1);    opacity: .45; }
}

.pid-led { transform-box: fill-box; transform-origin: center; animation: pidled 2.2s ease-in-out infinite; }
@keyframes pidled { 0%, 100% { transform: scale(.7); opacity: .4; } 50% { transform: scale(1.2); opacity: 1; } }

.pid-wave { stroke-dasharray: 96 30; animation: pidwave 3.6s linear infinite; }
@keyframes pidwave { to { stroke-dashoffset: -126; } }

/* 3D 写实版新增：压力脉冲沿管路循环、屏内扫描线、金属镜面扫光 */
.pid-pulse { animation: pidpulse 4.6s cubic-bezier(.55,.05,.45,.95) infinite; }
@keyframes pidpulse {
  0%   { transform: translateX(0);    opacity: 0; }
  6%   { opacity: 1; }
  94%  { opacity: 1; }
  100% { transform: translateX(404px); opacity: 0; }
}

.pid-scan { animation: pidscan 3.2s ease-in-out infinite; }
@keyframes pidscan { 0%, 100% { transform: translateX(0); opacity: .35; } 50% { transform: translateX(38px); opacity: .9; } }

.pid-breath { animation: pidbreath 3.8s ease-in-out infinite; }
@keyframes pidbreath { 0%, 100% { opacity: .3; } 50% { opacity: .85; } }

.pid-spin {
  transform-box: fill-box;
  transform-origin: center;
  animation: pidspin 7s linear infinite;
}
@keyframes pidspin { to { transform: rotate(360deg); } }

/* -------------------------------------------------------- 10 响应式 */
/* 首屏舞台（桌面端）：产品不再被"装"在右栏，而是越过栏位压在排版上，
   与文字共用同一条基准线与同一束光，避免"贴上去"的观感 */
@media (min-width: 1181px) {
  .hero__inner {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 640px;
    align-items: center;
    gap: 0 32px;
    padding-block: 72px 64px;
  }
  .hero__copy { align-self: center; max-width: 640px; }
  .hero__art {
    justify-self: center;
    width: clamp(460px, 41vw, 640px);
    max-width: none;
    margin: 0;
  }
}

@media (max-width: 1180px) {
  :root { --gut: 26px; --sec-y: 84px; }
  .ftr__main { grid-template-columns: 1.4fr 1fr 1fr; gap: 40px 32px; }
  .ftr__col--contact { grid-column: 1 / -1; }
  .hero__art { max-width: 640px; }
  .prod-grid { grid-template-columns: repeat(2, 1fr); }
  .flow { grid-template-columns: repeat(3, 1fr); }
  .flow__node:nth-child(3n)::after { display: none; }
  .certs { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 1040px) {
  .nav, .hdr__cta { display: none; }
  .burger { display: block; }
  .split { grid-template-columns: 1fr; gap: 40px; }
  .split--aside { grid-template-columns: 1fr; }
  .sticky { position: static; }
  .metrics { grid-template-columns: repeat(2, 1fr); }
  .cta__inner { grid-template-columns: 1fr; gap: 30px; }
  .post { grid-template-columns: 110px 1fr; gap: 22px; }
  .post__go { display: none; }
}

@media (max-width: 860px) {
  :root { --sec-y: 68px; --nav-h: 66px; }
  .topbar { display: none; }
  /* 小屏页头高度收紧，名牌 LOGO 同步缩小以免顶出 */
  .brand__logo { height: 28px; }
  .brand__cn { margin-top: 5px; letter-spacing: .1em; }
  .g-3, .g-4, .g-5 { grid-template-columns: repeat(2, 1fr); }
  .sec-head { margin-bottom: 40px; }
  .page-hero { padding-block: 54px 48px; }
  .page-hero .watermark { display: none; }
  .card__body, .card--pad { padding: 26px 24px 28px; }
  .prod__body { padding: 20px 22px 22px; }
  .article { font-size: 1rem; }
}

@media (max-width: 680px) {
  :root { --gut: 18px; --sec-y: 56px; }
  body { font-size: 15px; }
  .g-2, .g-3, .g-4, .g-5 { grid-template-columns: 1fr; }
  .prod-grid, .metrics, .certs { grid-template-columns: 1fr; }
  .flow { grid-template-columns: 1fr; }
  .flow__node::after { display: none; }
  .hero__facts { grid-template-columns: 1fr; }
  .hero__fact { padding: 16px 18px; }
  .form__row { grid-template-columns: 1fr; }
  .post { grid-template-columns: 1fr; gap: 12px; }
  .post__date { display: flex; align-items: baseline; gap: 10px; }
  .post__date b { font-size: 1.125rem; }
  .ftr__main { grid-template-columns: 1fr; gap: 34px; padding-block: 48px 40px; }
  .cta__inner { padding-block: 48px; }
  .cta__acts .btn { width: 100%; }
  .hero__acts .btn { width: 100%; }
  .btn { padding: 0 22px; }
  .totop { right: 16px; bottom: 16px; }
  .marquee__item { padding: 16px 22px; font-size: .8125rem; }
  .tl { padding-left: 24px; }
  .tl__item::before { left: -24px; }
  .acc__a p { padding-right: 20px; }
  .spec-table { font-size: .8125rem; }
  .spec-table th, .spec-table td { padding: 11px 10px; }
  .spec-table tbody th { width: 42%; }
  /* 窄屏下多列参数表改为可横向滚动，避免撑破容器被裁切 */
  .spec-table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior-x: contain;
  }
  .spec-table caption { position: sticky; left: 0; }
  .wrap--wide { --gut: 18px; }
}

/* -------------------------------------------------- 11 动效与无障碍 */
.js .reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .7s cubic-bezier(.22, .61, .36, 1), transform .7s cubic-bezier(.22, .61, .36, 1);
  transition-delay: var(--d, 0ms);
}
.js .reveal.is-in { opacity: 1; transform: none; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
.btn:focus-visible {
  outline: none;
  box-shadow: inset 0 0 0 2px var(--accent), 0 0 0 3px rgba(0, 84, 200, .28);
}
.sr {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .js .reveal { opacity: 1; transform: none; }
}

@media print {
  .hdr, .topbar, .drawer, .scrim, .totop, .cta, .ftr__bar, .hero__art { display: none !important; }
  body { background: #fff; color: #000; }
  .band, .band--light, .band--dark, .hero, .page-hero, .cta, .ftr {
    background: #fff !important;
    color: #000 !important;
  }
  .watermark { display: none !important; }
  .card, .prod { border-color: #ccc; }
}