/* ==========================================================================
   广州拟合圆科技有限公司 · 官网样式
   浅色清爽风，配色取自公司 Logo 的蓝色阶
   ========================================================================== */

:root {
  /* ---- 品牌色阶（取自 Logo：亮青 → 深蓝）---- */
  --navy-900: #0F3057;
  --navy-800: #143C68;
  --navy-700: #1A518A;   /* Logo 深蓝 */
  --blue-700: #1A6EA5;   /* Logo 中蓝 */
  --blue-600: #1B90C2;   /* Logo 主蓝 */
  --blue-500: #28A6D6;
  --blue-400: #4FBEE6;
  --blue-300: #8AD6F2;
  --blue-200: #B9E5F8;
  --blue-100: #D8EEFA;
  --blue-50: #EDF7FD;
  --cyan-500: #19B2E0;   /* Logo 亮青 */
  --cyan-400: #4FC9EC;
  --amber-500: #F2A33C;  /* Logo 橙色点缀 */

  /* ---- 中性色 ---- */
  --ink: #14385E;        /* 标题：偏蓝的深色，比纯黑柔和 */
  --body: #4C6B86;
  --muted: #7C97AC;
  --line: #DDECF6;
  --line-soft: #EDF5FB;
  --white: #FFFFFF;
  --bg-soft: #F5FAFD;
  --bg-tint: #EAF5FC;

  /* ---- 排版 ---- */
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-num: "SF Mono", "JetBrains Mono", Consolas, "Liberation Mono", monospace;

  /* ---- 尺寸 ---- */
  --container: 1200px;
  --gutter: 24px;
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 18px;
  --header-h: 74px;

  --shadow-sm: 0 1px 2px rgba(26, 81, 138, .05), 0 2px 10px rgba(26, 81, 138, .05);
  --shadow: 0 4px 14px rgba(26, 81, 138, .07), 0 14px 34px rgba(26, 81, 138, .06);
  --shadow-lg: 0 10px 34px rgba(26, 81, 138, .1), 0 30px 64px rgba(26, 81, 138, .08);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.78;
  color: var(--body);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  margin: 0;
  color: var(--ink);
  font-weight: 700;
  line-height: 1.32;
  letter-spacing: -.01em;
}

h1 { font-size: clamp(30px, 4.2vw, 50px); line-height: 1.2; }
h2 { font-size: clamp(24px, 2.8vw, 35px); }
h3 { font-size: clamp(18px, 1.5vw, 21px); }
h4 { font-size: 17px; }

p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

a { color: var(--blue-600); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--blue-500); }

img, svg { max-width: 100%; display: block; }
img { height: auto; }

ul, ol { margin: 0; padding: 0; list-style: none; }

:focus-visible {
  outline: 3px solid var(--blue-400);
  outline-offset: 2px;
  border-radius: 4px;
}

/* --------------------------------------------------------------- 布局工具 */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding: clamp(58px, 7vw, 106px) 0; }
.section--soft { background: var(--bg-soft); }
.section--tight { padding: clamp(42px, 5vw, 66px) 0; }

/* 浅色强调区块：淡蓝底，替代原来的深色区块 */
.section--tint {
  background:
    linear-gradient(180deg, var(--bg-tint) 0%, var(--bg-soft) 100%);
}

/* 淡蓝网格底纹 */
.section--grid {
  background-color: var(--bg-soft);
  background-image:
    linear-gradient(rgba(27, 144, 194, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(27, 144, 194, .05) 1px, transparent 1px);
  background-size: 46px 46px;
}

/* --------------------------------------------------------------- 章节标题 */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--blue-600);
  margin-bottom: 14px;
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  border-radius: 2px;
  background: var(--cyan-500);
}

.section-head { max-width: 760px; margin-bottom: clamp(34px, 4vw, 54px); }
.section-head--center { margin-inline: auto; text-align: center; }
.section-head--center .eyebrow { justify-content: center; }
.section-head p {
  margin-top: 16px;
  font-size: 17px;
  color: var(--muted);
}

/* 区块下方的补充说明（例如适用范围后面的选型提示） */
.section-note {
  margin: clamp(26px, 3vw, 38px) 0 0;
  padding: 16px 20px;
  border-left: 3px solid var(--blue-300);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: #fff;
  font-size: 14.5px;
  color: var(--muted);
}

/* --------------------------------------------------------------- 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  white-space: nowrap;
  transition: transform .18s ease, box-shadow .2s ease,
    background-color .2s ease, border-color .2s ease, color .2s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background: linear-gradient(135deg, var(--blue-600), var(--blue-500));
  color: #fff;
  box-shadow: 0 6px 18px rgba(27, 144, 194, .26);
}
.btn--primary:hover {
  color: #fff;
  box-shadow: 0 10px 26px rgba(27, 144, 194, .34);
  filter: brightness(1.05);
}

/* 次要按钮：浅底描边，适配浅色页面 */
.btn--ghost {
  background: #fff;
  color: var(--blue-600);
  border-color: var(--blue-200);
  box-shadow: var(--shadow-sm);
}
.btn--ghost:hover {
  background: var(--blue-50);
  border-color: var(--blue-400);
  color: var(--blue-700);
}

.btn--outline {
  background: transparent;
  color: var(--blue-600);
  border-color: var(--blue-200);
}
.btn--outline:hover {
  border-color: var(--blue-400);
  background: var(--blue-50);
  color: var(--blue-700);
}

.btn--lg { padding: 15px 32px; font-size: 16px; }

.btn-row { display: flex; flex-wrap: wrap; gap: 14px; }

.arrow { width: 16px; height: 16px; flex: none; }

/* --------------------------------------------------------------- 顶部信息条 */
.topbar {
  background: var(--blue-50);
  border-bottom: 1px solid var(--line);
  color: var(--body);
  font-size: 13px;
  line-height: 1;
}
.topbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 40px;
  padding-block: 9px;
}
.topbar__list { display: flex; flex-wrap: wrap; gap: 22px; }
.topbar__item { display: inline-flex; align-items: center; gap: 7px; }
.topbar__item svg { width: 14px; height: 14px; color: var(--blue-600); }
.topbar a { color: var(--body); font-weight: 500; }
.topbar a:hover { color: var(--blue-600); }
.topbar__tag {
  color: var(--blue-700);
  font-weight: 600;
  letter-spacing: .04em;
}

/* --------------------------------------------------------------- 导航 */
.header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(255, 255, 255, .93);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line-soft);
  transition: box-shadow .25s ease, border-color .25s ease;
}
.header.is-stuck {
  box-shadow: 0 2px 22px rgba(26, 81, 138, .08);
  border-bottom-color: var(--line);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: var(--header-h);
}

/* Logo（用的是公司正式 Logo 图片）*/
.logo {
  display: inline-flex;
  align-items: center;
  flex: none;
}
.logo__img {
  height: 46px;
  width: auto;
}
.logo:hover .logo__img { opacity: .88; }

/* 兼容旧的文字式 logo 结构（内页如需可用）*/
.logo__mark { width: 38px; height: 38px; flex: none; }
.logo__text { display: flex; flex-direction: column; line-height: 1.15; margin-left: 11px; }
.logo__name { font-size: 17px; font-weight: 700; letter-spacing: .02em; color: var(--ink); }
.logo__sub {
  font-size: 10px; font-weight: 600; letter-spacing: .16em;
  color: var(--blue-600); text-transform: uppercase;
}

/* 主导航 */
.nav { display: flex; align-items: center; gap: 4px; }
.nav__link {
  position: relative;
  padding: 10px 15px;
  font-size: 15px;
  font-weight: 500;
  color: var(--body);
  border-radius: var(--radius-sm);
  transition: color .2s ease, background-color .2s ease;
}
.nav__link:hover { color: var(--blue-600); background: var(--blue-50); }
.nav__link.is-active { color: var(--blue-600); font-weight: 600; }
.nav__link.is-active::after {
  content: "";
  position: absolute;
  left: 15px;
  right: 15px;
  bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--blue-600), var(--cyan-500));
}

.header__cta { flex: none; }
.header__actions { display: flex; align-items: center; gap: 12px; }

/* 语言切换 */
.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 3px;
  flex: none;
  border: 1px solid var(--line);
  border-radius: 100px;
  background: var(--blue-50);
}
.lang-switch__item {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 42px;
  padding: 6px 10px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  line-height: 1;
  color: var(--muted);
  transition: background-color .2s ease, color .2s ease;
}
a.lang-switch__item:hover { color: var(--blue-600); background: #fff; }
.lang-switch__item.is-active {
  background: #fff;
  color: var(--blue-700);
  box-shadow: var(--shadow-sm);
}

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fff;
  cursor: pointer;
  position: relative;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  position: absolute;
  left: 50%;
  width: 18px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transform: translateX(-50%);
  transition: transform .25s ease, opacity .2s ease;
}
.nav-toggle span { top: 50%; margin-top: -1px; }
.nav-toggle span::before { content: ""; top: -6px; }
.nav-toggle span::after { content: ""; top: 6px; }
.nav-toggle[aria-expanded="true"] span { background: transparent; }
.nav-toggle[aria-expanded="true"] span::before { transform: translate(-50%, 6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span::after { transform: translate(-50%, -6px) rotate(-45deg); }

/* --------------------------------------------------------------- 首页主视觉 */
.hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(900px 460px at 88% -6%, rgba(79, 201, 236, .28), transparent 62%),
    radial-gradient(760px 420px at 4% 6%, rgba(27, 144, 194, .12), transparent 66%),
    linear-gradient(180deg, #F2FAFE 0%, #FFFFFF 78%);
}
.hero::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 1px;
  background: var(--line-soft);
}
.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 1fr);
  gap: clamp(32px, 4.5vw, 64px);
  align-items: center;
  padding: clamp(56px, 7vw, 96px) 0 clamp(44px, 5vw, 72px);
}
.hero__inner { max-width: 620px; }
.hero h1 { color: var(--ink); }
.hero__lead {
  margin-top: 22px;
  font-size: clamp(16px, 1.3vw, 18px);
  line-height: 1.9;
  color: var(--body);
}
.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 7px 16px 7px 12px;
  margin-bottom: 24px;
  border: 1px solid var(--blue-200);
  border-radius: 100px;
  background: rgba(255, 255, 255, .82);
  box-shadow: var(--shadow-sm);
  font-size: 13px;
  font-weight: 500;
  color: var(--blue-700);
  letter-spacing: .02em;
}
.hero__badge::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan-500);
  box-shadow: 0 0 0 4px rgba(25, 178, 224, .18);
}
.hero .btn-row { margin-top: 34px; }

.hero__visual { position: relative; }
.hero__visual img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  object-position: center 44%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}
/* 图片左下的浮动数据卡，呼应系统界面 */
.hero__visual::after {
  content: "";
  position: absolute;
  inset: auto 0 -14px 0;
  height: 40%;
  border-radius: 50%;
  background: radial-gradient(closest-side, rgba(27, 144, 194, .12), transparent);
  z-index: -1;
}

/* 主视觉下方的实时参数条 */
.metrics {
  position: relative;
  background: #fff;
  border-top: 1px solid var(--line-soft);
}
.metrics__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line-soft);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line-soft);
  margin-top: -1px;
}
.metrics__item {
  background: #fff;
  padding: 22px 24px;
}
.metrics__label {
  display: block;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 7px;
}
.metrics__value {
  font-family: var(--font-num);
  font-size: clamp(20px, 2vw, 26px);
  font-weight: 600;
  color: var(--blue-700);
  letter-spacing: -.02em;
}
.metrics__unit {
  font-size: 13px;
  font-weight: 500;
  color: var(--cyan-500);
  margin-left: 5px;
}
.metrics__note {
  margin: 0;
  padding: 13px 0 0;
  font-size: 12.5px;
  color: var(--muted);
}

/* --------------------------------------------------------------- 卡片 */
.grid { display: grid; gap: 22px; }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 30px 26px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.card:hover {
  transform: translateY(-3px);
  border-color: var(--blue-200);
  box-shadow: var(--shadow);
}
.card__icon {
  display: grid;
  place-items: center;
  width: 50px;
  height: 50px;
  margin-bottom: 20px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--blue-50), var(--bg-tint));
  color: var(--blue-600);
}
.card__icon svg { width: 24px; height: 24px; }
.card h3 { margin-bottom: 10px; }
.card p { font-size: 15px; color: var(--muted); }

.card--accent::before {
  content: "";
  position: absolute;
  top: 0;
  left: 26px;
  width: 42px;
  height: 3px;
  border-radius: 0 0 3px 3px;
  background: linear-gradient(90deg, var(--blue-600), var(--cyan-500));
}

/* 编号卡片 */
.card__num {
  font-family: var(--font-num);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--blue-400);
  margin-bottom: 14px;
}

/* --------------------------------------------------------------- 图文分栏 */
.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: center;
}
.split--reverse { grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); }
.split--reverse .split__media { order: 2; }

.split__media { position: relative; }
.split__media img {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

/* 悬浮数据卡 */
.float-card {
  position: absolute;
  right: -18px;
  bottom: -26px;
  min-width: 208px;
  padding: 18px 20px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
}
.float-card__label {
  font-size: 12px;
  color: var(--muted);
  letter-spacing: .06em;
  margin-bottom: 8px;
}
.float-card__value {
  font-family: var(--font-num);
  font-size: 24px;
  font-weight: 700;
  color: var(--blue-700);
  line-height: 1.2;
}
.float-card__value small {
  font-size: 13px;
  font-weight: 500;
  color: var(--muted);
  margin-left: 4px;
}
.float-card__bar {
  margin-top: 12px;
  height: 5px;
  border-radius: 3px;
  background: var(--blue-50);
  overflow: hidden;
}
.float-card__bar i {
  display: block;
  height: 100%;
  width: 68%;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--blue-500), var(--cyan-500));
}

/* 要点列表 */
.checklist { display: grid; gap: 14px; margin-top: 26px; }
.checklist li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  font-size: 15px;
}
.checklist svg {
  flex: none;
  width: 20px;
  height: 20px;
  margin-top: 3px;
  color: var(--cyan-500);
}
.checklist strong { color: var(--ink); font-weight: 600; }

/* --------------------------------------------------------------- 参数表 */
.spec-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.spec-table caption {
  caption-side: top;
  text-align: left;
  padding: 0 0 14px;
  font-size: 14px;
  color: var(--muted);
}
.spec-table th,
.spec-table td {
  padding: 14px 18px;
  text-align: left;
  border-bottom: 1px solid var(--line-soft);
}
.spec-table thead th {
  background: var(--blue-50);
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
}
.spec-table tbody tr:last-child th,
.spec-table tbody tr:last-child td { border-bottom: none; }
.spec-table tbody th {
  font-weight: 500;
  color: var(--body);
  width: 38%;
}
.spec-table td {
  font-family: var(--font-num);
  color: var(--blue-700);
  font-weight: 600;
}

/* --------------------------------------------------------------- 应用场景卡 */
.scene {
  position: relative;
  display: block;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--blue-100);
  color: #fff;
  box-shadow: var(--shadow-sm);
  transition: transform .28s ease, box-shadow .28s ease;
}
.scene:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); color: #fff; }
.scene img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  transition: transform .5s ease;
}
.scene--wide img { aspect-ratio: 16 / 9; }
.scene:hover img { transform: scale(1.04); }
.scene__body {
  position: absolute;
  inset: auto 0 0 0;
  padding: 44px 22px 20px;
  background: linear-gradient(0deg, rgba(15, 48, 87, .92) 12%, rgba(15, 48, 87, .5) 58%, transparent 100%);
}
.scene__body h3 { color: #fff; font-size: 18px; margin-bottom: 6px; }
.scene__body p {
  font-size: 14px;
  color: rgba(255, 255, 255, .82);
  margin: 0;
}
.scene__tag {
  display: inline-block;
  padding: 3px 11px;
  margin-bottom: 10px;
  border-radius: 100px;
  background: rgba(79, 201, 236, .28);
  border: 1px solid rgba(138, 214, 242, .55);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .04em;
  color: #fff;
}

/* --------------------------------------------------------------- 步骤流程 */
.steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 22px;
  counter-reset: step;
}
.step {
  position: relative;
  padding-top: 30px;
  border-top: 2px solid var(--line);
}
.step::before {
  counter-increment: step;
  content: "0" counter(step);
  position: absolute;
  top: -2px;
  left: 0;
  padding-top: 30px;
  font-family: var(--font-num);
  font-size: 13px;
  font-weight: 700;
  color: var(--blue-500);
  letter-spacing: .06em;
  transform: translateY(-100%);
}
.step h3 { font-size: 17px; margin-bottom: 8px; }
.step p { font-size: 14px; color: var(--muted); }

/* --------------------------------------------------------------- CTA 条 */
.cta {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(720px 320px at 90% 10%, rgba(79, 201, 236, .3), transparent 66%),
    radial-gradient(620px 300px at 2% 96%, rgba(27, 144, 194, .14), transparent 70%),
    linear-gradient(135deg, #EAF6FD 0%, #F6FBFE 100%);
  border-top: 1px solid var(--line-soft);
}
.cta__inner {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  padding: clamp(46px, 5vw, 72px) 0;
}
.cta h2 { max-width: 620px; }
.cta p { margin-top: 12px; color: var(--body); max-width: 560px; }

/* CTA 里的电话：作为次要信息跟在正文后面，
   不要做成按钮——一个孤零零的号码当按钮很突兀 */
.cta__contact {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 18px;
  font-size: 15px;
  color: var(--muted);
}
.cta__contact svg { width: 17px; height: 17px; color: var(--blue-500); flex: none; }
.cta__contact a { font-weight: 600; color: var(--blue-700); }
.cta__contact a:hover { color: var(--blue-600); }

/* --------------------------------------------------------------- 页头（内页） */
.pagehead {
  position: relative;
  padding: clamp(48px, 6vw, 88px) 0;
  background:
    radial-gradient(760px 340px at 84% -10%, rgba(79, 201, 236, .3), transparent 64%),
    linear-gradient(180deg, #EFF8FD 0%, #F8FCFE 100%);
  border-bottom: 1px solid var(--line-soft);
  overflow: hidden;
}
.pagehead::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(27, 144, 194, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(27, 144, 194, .05) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: linear-gradient(180deg, #000 0%, transparent 90%);
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 90%);
}
.pagehead__inner { position: relative; }
.pagehead h1 { font-size: clamp(26px, 3.3vw, 40px); }
.pagehead p { margin-top: 16px; max-width: 720px; font-size: 17px; color: var(--body); }

/* 面包屑 */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  font-size: 13px;
  color: var(--muted);
}
.breadcrumb a { color: var(--blue-600); }
.breadcrumb a:hover { color: var(--blue-700); }
.breadcrumb span[aria-current] { color: var(--muted); }

/* --------------------------------------------------------------- 关于我们 */
.about-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: clamp(32px, 5vw, 68px);
  align-items: center;
}
.about-hero img { border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); }

.info-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.info-list__item { background: #fff; padding: 22px 24px; }
.info-list__label {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 7px;
  letter-spacing: .04em;
}
.info-list__value {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  word-break: break-word;
}
.info-list__value--num { font-family: var(--font-num); letter-spacing: .01em; }

/* --------------------------------------------------------------- 联系页 */
.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
}

.contact-cards { display: grid; gap: 16px; }
.contact-card {
  display: flex;
  gap: 16px;
  padding: 22px 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color .2s ease, box-shadow .2s ease;
}
.contact-card:hover { border-color: var(--blue-200); box-shadow: var(--shadow-sm); }
.contact-card__icon {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  flex: none;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--blue-50), var(--bg-tint));
  color: var(--blue-600);
}
.contact-card__icon svg { width: 22px; height: 22px; }
.contact-card__label {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 5px;
}
.contact-card__value {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.6;
}
.contact-card__value--num { font-family: var(--font-num); }
.contact-card__value a { color: var(--ink); }
.contact-card__value a:hover { color: var(--blue-600); }

/* 二维码 */
.qr-panel {
  padding: 28px 26px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.qr-panel h3 { margin-bottom: 6px; }
.qr-panel > p { font-size: 14px; color: var(--muted); }
.qr-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-top: 22px;
}
.qr-item { text-align: center; }
.qr-item img {
  width: 100%;
  max-width: 168px;
  margin: 0 auto 12px;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fff;
}
.qr-item span {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
}
.qr-item small { display: block; font-size: 12px; color: var(--muted); }

/* 地图占位 */
.map-frame {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-soft);
}
.map-placeholder {
  display: grid;
  place-items: center;
  gap: 14px;
  padding: 40px 24px;
  text-align: center;
  background:
    linear-gradient(rgba(27, 144, 194, .06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(27, 144, 194, .06) 1px, transparent 1px);
  background-size: 32px 32px;
}
.map-placeholder svg { width: 34px; height: 34px; color: var(--blue-500); }
.map-placeholder p { margin: 0; font-size: 15px; color: var(--body); }
.map-placeholder strong { color: var(--ink); font-size: 16px; }
.map-placeholder__addr { font-size: 14px; color: var(--muted); }

/* ------------------------------------------------------------ 宽幅横幅图 */
.wide-banner {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: var(--blue-100);
}
.wide-banner img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  object-position: center 55%;
}
.wide-banner__caption {
  position: absolute;
  inset: auto 0 0 0;
  padding: 64px 30px 26px;
  background: linear-gradient(0deg, rgba(15, 48, 87, .92) 10%, rgba(15, 48, 87, .48) 56%, transparent 100%);
  color: #fff;
}
.wide-banner__caption h3 { color: #fff; font-size: clamp(18px, 2vw, 24px); margin-bottom: 6px; }
.wide-banner__caption p { margin: 0; font-size: 15px; color: rgba(255, 255, 255, .84); }

/* --------------------------------------------------------------- 常见问答 */
.faq { display: grid; gap: 12px; max-width: 900px; margin-inline: auto; }
.faq__item {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.faq__item[open] { border-color: var(--blue-200); box-shadow: var(--shadow-sm); }
.faq__item summary {
  position: relative;
  padding: 20px 58px 20px 24px;
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}
.faq__item summary::-webkit-details-marker { display: none; }
.faq__item summary::after {
  content: "";
  position: absolute;
  right: 24px;
  top: 50%;
  width: 11px;
  height: 11px;
  border-right: 2px solid var(--blue-600);
  border-bottom: 2px solid var(--blue-600);
  transform: translateY(-70%) rotate(45deg);
  transition: transform .25s ease;
}
.faq__item[open] summary::after { transform: translateY(-30%) rotate(-135deg); }
.faq__item summary:hover { color: var(--blue-700); }
.faq__body {
  padding: 0 24px 22px;
  font-size: 15px;
  color: var(--muted);
}
.faq__body p:last-child { margin-bottom: 0; }

/* --------------------------------------------------------------- 页脚 */
.footer {
  background: linear-gradient(180deg, var(--bg-soft) 0%, #EDF6FC 100%);
  border-top: 1px solid var(--line);
  color: var(--body);
  font-size: 14px;
  padding-top: clamp(48px, 5vw, 70px);
}
.footer__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) repeat(2, minmax(0, 1fr)) minmax(0, 1.2fr);
  gap: 36px;
  padding-bottom: 44px;
}
.footer h4 {
  color: var(--ink);
  font-size: 15px;
  margin-bottom: 18px;
  letter-spacing: .02em;
}
.footer a { color: var(--body); }
.footer a:hover { color: var(--blue-600); }
.footer__brand { }
.footer__desc { margin-top: 18px; max-width: 340px; line-height: 1.8; color: var(--muted); }
.footer__list { display: grid; gap: 11px; }
.footer__list li { display: flex; gap: 9px; align-items: flex-start; line-height: 1.7; }
.footer__list svg {
  flex: none;
  width: 15px;
  height: 15px;
  margin-top: 5px;
  color: var(--blue-500);
}
.footer__qr { display: flex; gap: 14px; margin-top: 18px; }
.footer__qr figure { margin: 0; }
.footer__qr img {
  width: 96px;
  height: 96px;
  padding: 5px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}
.footer__qr figcaption {
  margin-top: 8px;
  font-size: 12px;
  text-align: center;
  color: var(--muted);
}

.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 22px 0;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--muted);
}
.footer__bottom a { color: var(--muted); }
.footer__bottom a:hover { color: var(--blue-600); }
.footer__legal { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; }

/* --------------------------------------------------------------- 滚动动画 */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .7s cubic-bezier(.22, .61, .36, 1),
    transform .7s cubic-bezier(.22, .61, .36, 1);
  will-change: opacity, transform;
}
.reveal.is-visible { opacity: 1; transform: none; }

/* --------------------------------------------------------------- 响应式 */
@media (max-width: 1080px) {
  .footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 32px; }
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 30px; }
  .hero__grid { grid-template-columns: minmax(0, 1fr) minmax(0, .95fr); }
}

@media (max-width: 900px) {
  :root { --header-h: 64px; }

  .nav-toggle { display: block; }

  .nav {
    /* 相对页头定位：top:100% 永远贴着页头下沿。
       不要用 calc(header高度 + 顶栏高度) 硬编码——顶栏在窄屏会折行变高。 */
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 14px var(--gutter) 22px;
    background: #fff;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 18px 30px rgba(26, 81, 138, .12);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: opacity .22s ease, transform .22s ease, visibility .22s;
    max-height: 74vh;
    overflow-y: auto;
  }
  .nav.is-open { opacity: 1; visibility: visible; transform: none; }
  .nav__link { padding: 13px 14px; font-size: 16px; }
  .nav__link.is-active::after { display: none; }
  .nav__link.is-active { background: var(--blue-50); }
  .header__cta { display: none; }

  .topbar__list { gap: 14px; font-size: 12px; }
  .topbar__inner { justify-content: center; }
  .topbar__tag { display: none; }

  .hero__grid { grid-template-columns: minmax(0, 1fr); gap: 32px; }
  .hero__inner { max-width: none; }
  .metrics__grid { grid-template-columns: repeat(2, 1fr); }

  .split,
  .split--reverse,
  .about-hero,
  .contact-grid { grid-template-columns: minmax(0, 1fr); }
  .split--reverse .split__media { order: 0; }
  .float-card { right: 12px; bottom: -20px; }

  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .section-head { max-width: none; }
  .cta__inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 620px) {
  :root { --gutter: 18px; }

  body { font-size: 15px; }

  .grid--2,
  .grid--3,
  .grid--4,
  .steps,
  .info-list,
  .qr-list { grid-template-columns: minmax(0, 1fr); }

  .metrics__grid { grid-template-columns: repeat(2, 1fr); }
  .metrics__item { padding: 16px 14px; }
  .metrics__value { font-size: 19px; }

  .card { padding: 24px 20px; }
  .footer__grid { grid-template-columns: minmax(0, 1fr); }
  .footer__bottom { flex-direction: column; align-items: flex-start; }
  .float-card { position: static; margin-top: 16px; right: auto; bottom: auto; }
  .btn-row .btn { width: 100%; }
  .spec-table th,
  .spec-table td { padding: 12px 14px; font-size: 14px; }
  .logo__img { height: 38px; }
}

/* --------------------------------------------------------------- 可访问性 */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: -60px;
  left: 12px;
  z-index: 100;
  padding: 10px 18px;
  background: var(--blue-600);
  color: #fff;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  transition: top .2s ease;
}
.skip-link:focus { top: 0; color: #fff; }

@media print {
  .header, .topbar, .nav-toggle, .cta, .footer__qr { display: none; }
  body { color: #000; }
}


/* ==========================================================================
   技术文章（/news/ 栏目）
   --------------------------------------------------------------------------
   正文宽度刻意收窄到 780px：中文长文的舒适阅读行宽约 30–40 字，
   铺满 1200px 会让人读两行就串行，跳出率反而高。
   ========================================================================== */
.article { max-width: 780px; margin: 0 auto; }

.article__meta {
  display: flex; flex-wrap: wrap; gap: 6px 18px;
  margin: 0 0 22px; font-size: 13px; color: var(--muted);
}
.article__meta b { color: var(--blue-700); font-weight: 600; }

.article__lead {
  margin: 0 0 34px; padding: 20px 24px;
  font-size: 17px; line-height: 1.85; color: var(--ink);
  background: var(--blue-50);
  border-left: 3px solid var(--blue-600);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.article h2 {
  margin: 46px 0 16px; padding-top: 10px;
  font-size: 23px; line-height: 1.45; color: var(--ink);
}
.article h2:first-of-type { margin-top: 0; }
.article h3 { margin: 28px 0 12px; font-size: 18px; color: var(--navy-700); }
.article p { margin: 0 0 18px; line-height: 1.9; }
.article ul, .article ol { margin: 0 0 20px; padding-left: 24px; }
.article li { margin-bottom: 10px; line-height: 1.85; }
.article strong { color: var(--ink); font-weight: 600; }
/* 正文里的链接才用蓝色下划线样式。
   必须显式排除 .btn：文章末尾的行动号召按钮也是 <a>，
   而 .article a 的特异度 (0,1,1) 高于 .btn--primary 的 (0,1,0)，
   不排除的话按钮文字会被染成蓝色，在蓝底上几乎看不见。*/
.article a:not(.btn) { color: var(--blue-600); text-decoration: underline; text-underline-offset: 3px; }
.article a:not(.btn):hover { color: var(--navy-700); }
.article code {
  font-family: var(--font-num); font-size: .92em;
  background: var(--blue-50); padding: 2px 6px; border-radius: 4px;
}

.article table { width: 100%; margin: 0 0 24px; border-collapse: collapse; font-size: 15px; }
.article th, .article td { padding: 11px 14px; border: 1px solid var(--line); text-align: left; }
.article th { background: var(--blue-50); color: var(--ink); font-weight: 600; white-space: nowrap; }
.article table caption { caption-side: bottom; padding-top: 10px; font-size: 13px; color: var(--muted); text-align: left; }

/* 提示框：用来放注意/经验这类旁注，不打断正文节奏 */
.article__note {
  margin: 0 0 24px; padding: 16px 20px;
  background: #FFF9F0; border: 1px solid #F6E2C4;
  border-radius: var(--radius); font-size: 15px; line-height: 1.85;
}
.article__note b { color: #8A5A12; }

.article__cta {
  margin: 44px 0 0; padding: 28px 30px;
  background: linear-gradient(135deg, var(--blue-50), var(--bg-tint));
  border: 1px solid var(--line); border-radius: var(--radius-lg);
  text-align: center;
}
.article__cta h2 { margin: 0 0 10px; font-size: 20px; }
.article__cta p { margin: 0 0 20px; color: var(--body); font-size: 15px; }

/* ---- 文章列表（/news/ 栏目首页）---- */
.post-list { display: grid; gap: 18px; }
.post-card {
  display: block; padding: 26px 28px;
  background: var(--white); border: 1px solid var(--line);
  border-radius: var(--radius); text-decoration: none;
  transition: border-color .2s, box-shadow .2s, transform .2s;
}
.post-card:hover { border-color: var(--blue-300); box-shadow: var(--shadow); transform: translateY(-2px); }
.post-card h2 { margin: 0 0 10px; font-size: 19px; line-height: 1.5; color: var(--ink); }
.post-card p { margin: 0 0 14px; font-size: 15px; line-height: 1.8; color: var(--body); }
.post-card__meta { display: flex; flex-wrap: wrap; gap: 6px 16px; font-size: 13px; color: var(--muted); }
.post-card__tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 12px; }
.post-card__tags span {
  padding: 2px 10px; font-size: 12px; color: var(--blue-700);
  background: var(--blue-50); border-radius: 20px;
}

@media (max-width: 620px) {
  .article__lead { padding: 16px 18px; font-size: 16px; }
  .article h2 { font-size: 20px; margin-top: 36px; }
  .article__cta { padding: 22px 20px; }
  .post-card { padding: 20px; }
}

/* --------------------------------------------------------------- 技术参数页 */
/* 内容来自客户提供的技术参数说明书（docx 转换生成）。
   表格很多，所以表格单独做了横向滚动容器——窄屏上表格不会被压变形。 */
.spec-body { max-width: 920px; }
.spec-body h2 { margin-top: 46px; }
.spec-body h2:first-child { margin-top: 0; }
.spec-body h3 { margin-top: 30px; }
.spec-body p { margin: 10px 0; line-height: 1.75; }

.table-wrap { overflow-x: auto; margin: 18px 0 28px; -webkit-overflow-scrolling: touch; }

/* 文档里以「注：」开头的补充说明，弱化显示，避免和专业参数抢注意力 */
.spec-note { font-size: 13px; color: var(--muted); line-height: 1.7; }

.spec-download {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  align-items: center;
  justify-content: space-between;
}
.spec-download h2 { font-size: 22px; margin: 0 0 6px; }
.spec-download p { margin: 0; color: var(--muted); max-width: 560px; }
.spec-download__btn { flex: 0 0 auto; }

.spec-figure { margin: 0 0 24px; }
.spec-figure img {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}
.spec-figure figcaption {
  margin-top: 12px;
  font-size: 13px;
  color: var(--muted);
  text-align: center;
}

.spec-contact { margin-top: 20px; font-size: 15px; }

@media (max-width: 720px) {
  .spec-download { flex-direction: column; align-items: flex-start; }
}

/* --------------------------------------------------------------- 在线询价表单 */
.enquire {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: start;
}
.enquire__intro h2 { margin: 10px 0 14px; }
.enquire__intro p { color: var(--muted); line-height: 1.8; }
.enquire__points { margin: 20px 0 0; padding: 0; list-style: none; }
.enquire__points li {
  position: relative;
  padding-left: 24px;
  margin: 8px 0;
  font-size: 14px;
  color: var(--muted);
}
.enquire__points li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 8px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan-500);
}

.enquire__form {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: clamp(24px, 3vw, 40px);
}
.field { margin-bottom: 18px; }
.field label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 8px;
}
.field input {
  width: 100%;
  padding: 13px 15px;
  font-size: 15px;
  font-family: inherit;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color .18s, box-shadow .18s;
}
.field input:focus {
  outline: none;
  border-color: var(--blue-600);
  box-shadow: 0 0 0 3px rgba(27, 144, 194, .12);
}
/* 蜜罐：真人看不见，机器人会填 */
.field--hp {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}
.enquire__form .btn { width: 100%; margin-top: 6px; }
.enquire__msg { margin: 14px 0 0; font-size: 14px; min-height: 20px; }
.enquire__msg.is-ok { color: #17864a; }
.enquire__msg.is-error { color: #c0392b; }
.enquire__note { margin: 10px 0 0; font-size: 13px; color: var(--muted); }

@media (max-width: 860px) {
  .enquire { grid-template-columns: 1fr; }
}

/* 首页 H1 拆成两段：主词在上、口号在下。
   H1 标签里因此含住「米重控制系统」这个主词，但视觉上仍是一句顺话。 */
.hero__h1-sub {
  display: block;
  margin-top: .18em;
  font-size: .52em;
  font-weight: 500;
  letter-spacing: .01em;
  opacity: .92;
}