/* =========================================================
   宁波云之甬智能科技有限公司 官网样式
   风格：简约大气 · 科技蓝
   ========================================================= */

:root {
  --blue-900: #042C53;
  --blue-800: #0C447C;
  --blue-700: #185FA5;
  --blue-600: #378ADD;
  --blue-500: #5B9BE8;
  --blue-100: #E6F1FB;
  --blue-50:  #F2F8FE;

  --gray-900: #1D2129;
  --gray-700: #4E5969;
  --gray-500: #86909C;
  --gray-300: #C9CDD4;
  --gray-100: #F2F3F5;

  --bg: #F7F8FA;
  --white: #FFFFFF;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --shadow-sm: 0 2px 8px rgba(4, 44, 83, 0.06);
  --shadow-md: 0 8px 24px rgba(4, 44, 83, 0.08);
  --shadow-lg: 0 16px 48px rgba(4, 44, 83, 0.12);

  --container: 1200px;
  --header-h: 64px;

  --font: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB",
          -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--gray-900);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ============ 通用排版 ============ */
.section { padding: 96px 0; }
.section--tint { background: var(--bg); }

.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 2px;
  color: var(--blue-700);
  background: var(--blue-100);
  padding: 4px 14px;
  border-radius: 999px;
  margin-bottom: 18px;
}

.section-title {
  font-size: 32px;
  font-weight: 600;
  color: var(--blue-900);
  letter-spacing: -0.5px;
  margin-bottom: 14px;
}

.section-sub {
  font-size: 16px;
  color: var(--gray-500);
  max-width: 640px;
  margin: 0 auto 56px;
  text-align: center;
}

.text-center { text-align: center; }

/* ============ 按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 500;
  padding: 12px 26px;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all .25s ease;
  white-space: nowrap;
}
.btn-primary { background: var(--blue-700); color: #fff; box-shadow: var(--shadow-sm); }
.btn-primary:hover { background: var(--blue-800); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn-ghost { background: transparent; color: var(--blue-700); border-color: var(--blue-500); }
.btn-ghost:hover { background: var(--blue-50); }
.btn-light { background: #fff; color: var(--blue-700); }
.btn-light:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn-outline-light { background: transparent; color: #fff; border-color: rgba(255,255,255,.6); }
.btn-outline-light:hover { background: rgba(255,255,255,.12); }
.btn-block { width: 100%; }

/* ============ 头部导航 ============ */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  background: rgba(255,255,255,.85);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid transparent;
  z-index: 1000;
  transition: all .3s ease;
}
.header.scrolled { border-color: var(--gray-100); box-shadow: var(--shadow-sm); }

.header .container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo { display: flex; align-items: center; gap: 10px; font-weight: 600; font-size: 18px; color: var(--blue-900); }
.logo .mark {
  width: 34px; height: 34px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--blue-600), var(--blue-800));
  display: grid; place-items: center;
  color: #fff; font-size: 16px; font-weight: 700;
}
.logo .en { color: var(--blue-600); font-size: 13px; font-weight: 500; letter-spacing: 1px; }
.logo-img { height: 34px; width: auto; border-radius: 8px; display: block; }

.nav { display: flex; align-items: center; gap: 6px; }
.nav a {
  position: relative;
  font-size: 15px;
  color: var(--gray-700);
  padding: 8px 14px;
  border-radius: 8px;
  transition: color .2s ease;
}
.nav a:hover { color: var(--blue-700); }
.nav a.active { color: var(--blue-700); font-weight: 500; }
.nav a.active::after {
  content: "";
  position: absolute;
  left: 14px; right: 14px; bottom: 0;
  height: 2px;
  background: var(--blue-600);
  border-radius: 2px;
}

.nav-cta { margin-left: 12px; }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 40px; height: 40px;
  border: none; background: transparent;
  cursor: pointer;
  align-items: center; justify-content: center;
}
.hamburger span {
  width: 22px; height: 2px;
  background: var(--blue-900);
  border-radius: 2px;
  transition: all .3s ease;
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============ Hero ============ */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  color: #fff;
  background: linear-gradient(135deg, #042C53 0%, #0C447C 45%, #185FA5 100%);
  overflow: hidden;
  padding-top: var(--header-h);
}
.hero::before {
  content: "";
  position: absolute; inset: 0;
  background:
    radial-gradient(540px 540px at 18% 28%, rgba(91,155,232,.45), transparent 60%),
    radial-gradient(480px 480px at 82% 72%, rgba(55,138,221,.40), transparent 60%),
    radial-gradient(360px 360px at 60% 12%, rgba(180,212,244,.30), transparent 60%);
  animation: floatGlow 14s ease-in-out infinite alternate;
}
.hero::after {
  content: "";
  position: absolute; inset: -2px;
  background-image:
    linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: radial-gradient(circle at 50% 40%, #000 30%, transparent 78%);
  animation: drift 30s linear infinite;
}
.hero .container { position: relative; z-index: 2; }
.hero-inner { max-width: 760px; }

.hero-tag {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 14px;
  color: #CDE3F7;
  background: rgba(255,255,255,.10);
  border: 1px solid rgba(255,255,255,.18);
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 26px;
  backdrop-filter: blur(4px);
}
.hero-tag .dot { width: 8px; height: 8px; border-radius: 50%; background: #6BE3A2; box-shadow: 0 0 0 4px rgba(107,227,162,.25); }

.hero h1 {
  font-size: 56px;
  line-height: 1.12;
  font-weight: 700;
  letter-spacing: -1px;
  margin-bottom: 22px;
}
.hero h1 .accent { color: #8FC3F7; }

.hero-typed {
  font-size: 20px;
  color: #D6E8FA;
  min-height: 30px;
  margin-bottom: 18px;
  font-weight: 400;
}
.hero-typed .cursor {
  display: inline-block;
  width: 2px; height: 20px;
  background: #8FC3F7;
  margin-left: 3px;
  vertical-align: middle;
  animation: blink 1s step-end infinite;
}

.hero p.lead {
  font-size: 17px;
  color: #CDE3F7;
  max-width: 600px;
  margin-bottom: 34px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.hero-scroll {
  position: absolute;
  left: 50%; bottom: 26px;
  transform: translateX(-50%);
  z-index: 2;
  color: rgba(255,255,255,.7);
  font-size: 12px;
  letter-spacing: 2px;
  display: flex; flex-direction: column; align-items: center; gap: 8px;
}
.hero-scroll .mouse {
  width: 22px; height: 36px;
  border: 1.5px solid rgba(255,255,255,.5);
  border-radius: 12px;
  position: relative;
}
.hero-scroll .mouse::before {
  content: "";
  position: absolute; top: 7px; left: 50%;
  width: 3px; height: 7px; border-radius: 2px;
  background: rgba(255,255,255,.8);
  transform: translateX(-50%);
  animation: scrollDot 1.8s ease-in-out infinite;
}

/* ============ 卡片网格 ============ */
.grid { display: grid; gap: 24px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  box-shadow: var(--shadow-sm);
  transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: var(--blue-100); }

.card .icon {
  width: 54px; height: 54px;
  border-radius: 14px;
  background: var(--blue-50);
  color: var(--blue-700);
  display: grid; place-items: center;
  margin-bottom: 20px;
}
.card .icon svg { width: 28px; height: 28px; }
.card h3 { font-size: 19px; font-weight: 600; color: var(--blue-900); margin-bottom: 10px; }
.card p { font-size: 15px; color: var(--gray-500); }

.card--feature { border-top: 3px solid var(--blue-600); }

/* ============ 数据实力 ============ */
.stats { background: var(--blue-900); color: #fff; }
.stats .section-title,
.stats .section-sub { color: #fff; }
.stats .section-sub { color: #AFC6E0; }
.stat-item { text-align: center; padding: 12px; }
.stat-item .num {
  font-size: 46px;
  font-weight: 700;
  line-height: 1;
  background: linear-gradient(135deg, #8FC3F7, #5B9BE8);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 10px;
}
.stat-item .label { font-size: 15px; color: #B9CFE8; }

/* ============ 案例 ============ */
.case-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--gray-100);
  background: var(--white);
  box-shadow: var(--shadow-sm);
  transition: transform .3s ease, box-shadow .3s ease;
}
.case-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.case-thumb {
  height: 180px;
  background: linear-gradient(135deg, var(--blue-600), var(--blue-800));
  position: relative;
  display: grid; place-items: center;
  color: rgba(255,255,255,.85);
}
.case-thumb::after {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.08) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: radial-gradient(circle at 70% 30%, #000, transparent 75%);
}
.case-thumb .glyph { font-size: 44px; font-weight: 700; color: rgba(255,255,255,.9); position: relative; z-index: 1; }
.case-body { padding: 22px 24px 26px; }
.case-body h3 { font-size: 18px; color: var(--blue-900); margin-bottom: 8px; }
.case-body p { font-size: 14px; color: var(--gray-500); margin-bottom: 14px; }
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  font-size: 12px;
  color: var(--blue-700);
  background: var(--blue-50);
  padding: 4px 10px;
  border-radius: 6px;
}

/* ============ 合作伙伴 ============ */
.logo-wall {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.logo-wall .logo-item {
  height: 84px;
  display: grid; place-items: center;
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-md);
  color: var(--gray-500);
  font-weight: 600;
  font-size: 15px;
  filter: grayscale(1);
  opacity: .75;
  transition: all .25s ease;
}
.logo-wall .logo-item:hover { filter: none; opacity: 1; color: var(--blue-700); border-color: var(--blue-100); }

/* ============ 内页 Banner ============ */
.page-banner {
  position: relative;
  padding: calc(var(--header-h) + 90px) 0 80px;
  background: linear-gradient(135deg, #042C53 0%, #0C447C 55%, #185FA5 100%);
  color: #fff;
  overflow: hidden;
}
.page-banner::before {
  content: "";
  position: absolute; inset: 0;
  background:
    radial-gradient(420px 420px at 85% 20%, rgba(91,155,232,.40), transparent 60%),
    radial-gradient(360px 360px at 10% 90%, rgba(55,138,221,.35), transparent 60%);
}
.page-banner .container { position: relative; z-index: 2; }
.page-banner h1 { font-size: 40px; font-weight: 700; letter-spacing: -0.5px; margin-bottom: 14px; }
.page-banner p { font-size: 17px; color: #CDE3F7; max-width: 640px; }
.breadcrumb { font-size: 13px; color: #9FBCDE; margin-bottom: 18px; }
.breadcrumb a:hover { color: #fff; }

/* ============ 关于我们 ============ */
.about-intro { display: grid; grid-template-columns: 1.1fr .9fr; gap: 56px; align-items: center; }
.about-intro h2 { font-size: 30px; color: var(--blue-900); font-weight: 600; margin-bottom: 18px; }
.about-intro p { font-size: 16px; color: var(--gray-700); margin-bottom: 16px; }
.about-visual {
  aspect-ratio: 4/3;
  border-radius: var(--radius-xl);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: var(--blue-900);
}
.about-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.value-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.value-card {
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-lg);
  padding: 30px 28px;
  box-shadow: var(--shadow-sm);
}
.value-card .vc-title { font-size: 19px; font-weight: 600; color: var(--blue-900); margin-bottom: 10px; display: flex; align-items: center; gap: 10px; }
.value-card .vc-title .badge { width: 30px; height: 30px; border-radius: 8px; background: var(--blue-50); color: var(--blue-700); display: grid; place-items: center; font-size: 15px; }
.value-card p { font-size: 15px; color: var(--gray-500); }

/* ============ 时间线 ============ */
.timeline { position: relative; max-width: 860px; margin: 0 auto; padding-left: 0; }
.timeline::before {
  content: "";
  position: absolute; left: 120px; top: 8px; bottom: 8px;
  width: 2px; background: var(--blue-100);
}
.tl-item { position: relative; display: grid; grid-template-columns: 120px 1fr; gap: 30px; padding: 18px 0; }
.tl-year { text-align: right; font-size: 20px; font-weight: 700; color: var(--blue-700); padding-top: 2px; }
.tl-body { position: relative; padding-left: 30px; }
.tl-body::before {
  content: "";
  position: absolute; left: -7px; top: 8px;
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--white); border: 3px solid var(--blue-600);
}
.tl-body h3 { font-size: 18px; color: var(--blue-900); margin-bottom: 6px; }
.tl-body p { font-size: 15px; color: var(--gray-500); }

/* ============ 团队 ============ */
.team-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.member { text-align: center; }
.member .avatar {
  width: 100%; aspect-ratio: 1; border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--blue-600), var(--blue-900));
  display: grid; place-items: center;
  color: #fff; font-size: 40px; font-weight: 700;
  margin-bottom: 16px;
}
.member h3 { font-size: 17px; color: var(--blue-900); }
.member .role { font-size: 14px; color: var(--blue-600); margin-bottom: 6px; }
.member .bio { font-size: 13px; color: var(--gray-500); }

/* ============ 产品服务 ============ */
.product-category { margin-bottom: 80px; }
.product-category:last-child { margin-bottom: 0; }
.cat-head { display: flex; align-items: center; gap: 16px; margin-bottom: 32px; }
.cat-head .cat-no {
  width: 48px; height: 48px; border-radius: 12px;
  background: var(--blue-700); color: #fff;
  display: grid; place-items: center; font-size: 20px; font-weight: 700;
}
.cat-head h2 { font-size: 26px; color: var(--blue-900); font-weight: 600; }
.cat-head p { font-size: 14px; color: var(--gray-500); }

.product-card {
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-lg);
  padding: 30px 28px;
  box-shadow: var(--shadow-sm);
  transition: transform .3s ease, box-shadow .3s ease;
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.product-card .p-icon {
  width: 50px; height: 50px; border-radius: 12px;
  background: var(--blue-50); color: var(--blue-700);
  display: grid; place-items: center; margin-bottom: 18px;
}
.product-card h3 { font-size: 19px; color: var(--blue-900); margin-bottom: 12px; }
.product-card .p-desc { font-size: 15px; color: var(--gray-700); margin-bottom: 18px; }
.p-block { margin-top: 16px; padding-top: 16px; border-top: 1px dashed var(--gray-100); }
.p-block .p-label {
  font-size: 13px; font-weight: 600; color: var(--blue-700);
  letter-spacing: 1px; margin-bottom: 8px; display: flex; align-items: center; gap: 6px;
}
.p-block ul li { font-size: 14px; color: var(--gray-500); padding-left: 18px; position: relative; margin-bottom: 6px; }
.p-block ul li::before { content: ""; position: absolute; left: 0; top: 9px; width: 6px; height: 6px; border-radius: 50%; background: var(--blue-500); }

/* 技术架构 */
.arch { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; align-items: stretch; }
.arch-step {
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-lg);
  padding: 26px 22px;
  text-align: center;
  position: relative;
}
.arch-step .step-no {
  width: 38px; height: 38px; margin: 0 auto 14px;
  border-radius: 50%; background: var(--blue-700); color: #fff;
  display: grid; place-items: center; font-weight: 700;
}
.arch-step h4 { font-size: 17px; color: var(--blue-900); margin-bottom: 8px; }
.arch-step p { font-size: 14px; color: var(--gray-500); }

/* ============ 联系我们 ============ */
.contact-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 40px; align-items: start; }
.contact-grid--solo { grid-template-columns: 1fr; max-width: 960px; margin: 0 auto; }
.info-card {
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-lg);
  padding: 40px 48px;
  box-shadow: var(--shadow-sm);
}
.info-item { display: flex; gap: 16px; padding: 18px 0; border-bottom: 1px solid var(--gray-100); }
.info-item:last-child { border-bottom: none; }
.info-item .i-icon {
  flex: 0 0 46px; width: 46px; height: 46px; border-radius: 12px;
  background: var(--blue-50); color: var(--blue-700);
  display: grid; place-items: center;
}
.info-item .i-text .i-label { font-size: 13px; color: var(--gray-500); }
.info-item .i-text .i-value,
.info-item .i-text .i-value a { font-size: 16px; color: var(--blue-900); font-weight: 500; text-decoration: none; }

.form-card {
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-lg);
  padding: 34px 30px;
  box-shadow: var(--shadow-sm);
}
.form-card h3 { font-size: 20px; color: var(--blue-900); margin-bottom: 22px; }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 14px; color: var(--gray-700); margin-bottom: 8px; }
.field label .req { color: #E24B4A; margin-left: 2px; }
.field input, .field textarea, .field select {
  width: 100%;
  font-family: var(--font);
  font-size: 15px;
  color: var(--gray-900);
  padding: 12px 14px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-sm);
  background: var(--white);
  transition: border-color .2s ease, box-shadow .2s ease;
}
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none;
  border-color: var(--blue-600);
  box-shadow: 0 0 0 3px rgba(55,138,221,.15);
}
.field textarea { resize: vertical; min-height: 110px; }
.field .error { display: none; font-size: 13px; color: #E24B4A; margin-top: 6px; }
.field.invalid input, .field.invalid textarea { border-color: #E24B4A; }
.field.invalid .error { display: block; }
.form-note { font-size: 13px; color: var(--gray-500); margin-top: 8px; }
.form-success {
  display: none;
  background: #EAF6EE; color: #2E7D4F;
  border: 1px solid #B7E2C4; border-radius: var(--radius-sm);
  padding: 14px 16px; font-size: 14px; margin-bottom: 16px;
}
.form-success.show { display: block; }

/* 地图 */
.map-wrap {
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  margin-top: 24px;
  background: var(--blue-50);
}
.map-wrap svg,
.map-wrap img { width: 100%; height: auto; display: block; }

/* ============ CTA 区 ============ */
.cta-band {
  background: linear-gradient(135deg, var(--blue-800), var(--blue-600));
  border-radius: var(--radius-xl);
  padding: 56px 48px;
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.cta-band::before {
  content: "";
  position: absolute; inset: 0;
  background:
    radial-gradient(300px 300px at 15% 20%, rgba(255,255,255,.16), transparent 60%),
    radial-gradient(300px 300px at 85% 80%, rgba(255,255,255,.14), transparent 60%);
}
.cta-band > * { position: relative; z-index: 2; }
.cta-band h2 { font-size: 30px; font-weight: 700; margin-bottom: 12px; }
.cta-band p { font-size: 16px; color: #D6E8FA; margin-bottom: 28px; }

/* ============ 页脚 ============ */
.footer {
  background: var(--blue-900);
  color: #B9CFE8;
  padding: 64px 0 28px;
}
.footer-top { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 44px; }
.footer .logo { color: #fff; margin-bottom: 16px; }
.footer .f-about { font-size: 14px; color: #9FB9D6; max-width: 420px; }
.footer h4 { font-size: 15px; color: #fff; font-weight: 600; margin-bottom: 18px; }
.footer ul li { margin-bottom: 10px; }
.footer ul li a { font-size: 14px; color: #9FB9D6; transition: color .2s ease; }
.footer ul li a:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.12);
  padding-top: 22px;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px;
  font-size: 13px; color: #7E9BBE;
}
.footer-bottom a { color: inherit; transition: color .2s ease; }
.footer-bottom a:hover { color: #fff; }

/* ============ 滚动淡入 ============ */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }

@keyframes floatGlow {
  0%   { transform: translate(0, 0) scale(1); }
  100% { transform: translate(40px, -30px) scale(1.15); }
}
@keyframes drift { from { background-position: 0 0; } to { background-position: 46px 46px; } }
@keyframes blink { 50% { opacity: 0; } }
@keyframes scrollDot { 0% { opacity: 0; transform: translate(-50%, 0); } 40% { opacity: 1; } 100% { opacity: 0; transform: translate(-50%, 12px); } }

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

/* ============ 响应式 ============ */
@media (max-width: 992px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .logo-wall { grid-template-columns: repeat(3, 1fr); }
  .arch { grid-template-columns: repeat(2, 1fr); }
  .about-intro { grid-template-columns: 1fr; gap: 32px; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 30px; }
  .value-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 44px; }
}

@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .section-title { font-size: 26px; }
  .hamburger { display: flex; }

  .nav {
    position: fixed;
    top: var(--header-h); left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    background: #fff;
    padding: 12px 24px 24px;
    border-bottom: 1px solid var(--gray-100);
    box-shadow: var(--shadow-md);
    gap: 4px;
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: all .25s ease;
  }
  .nav.open { transform: none; opacity: 1; pointer-events: auto; }
  .nav a { padding: 12px 8px; font-size: 16px; border-radius: 8px; }
  .nav a.active::after { display: none; }
  .nav-cta { margin: 8px 0 0; }
  .nav-cta .btn { width: 100%; }

  .hero { min-height: 86vh; }
  .hero h1 { font-size: 34px; }
  .hero-typed { font-size: 17px; }
  .hero p.lead { font-size: 15px; }
  .hero-actions .btn { flex: 1; }

  .grid-3, .grid-4, .grid-2 { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .logo-wall { grid-template-columns: repeat(2, 1fr); }
  .arch { grid-template-columns: 1fr; }

  .about-intro { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; }
  .cta-band { padding: 40px 22px; }
  .cta-band h2 { font-size: 24px; }
  .page-banner h1 { font-size: 30px; }

  .timeline::before { left: 8px; }
  .tl-item { grid-template-columns: 1fr; gap: 6px; padding-left: 30px; }
  .tl-year { text-align: left; }
  .tl-body { padding-left: 0; }
  .tl-body::before { left: -30px; }
}

/* ============ AIoT 设备服务页 ============ */
.cap-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.cap-card {
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-top: 3px solid var(--blue-600);
  border-radius: var(--radius-lg);
  padding: 30px 28px;
  box-shadow: var(--shadow-sm);
  transition: transform .3s ease, box-shadow .3s ease;
}
.cap-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.cap-card .c-icon { width: 52px; height: 52px; border-radius: 14px; background: var(--blue-50); color: var(--blue-700); display: grid; place-items: center; margin-bottom: 18px; }
.cap-card .c-icon svg { width: 27px; height: 27px; }
.cap-card h3 { font-size: 19px; color: var(--blue-900); margin-bottom: 10px; }
.cap-card p { font-size: 15px; color: var(--gray-500); }

.scene-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.scene-card {
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
}
.scene-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: var(--blue-100); }
.scene-card .s-icon { width: 50px; height: 50px; border-radius: 12px; background: var(--blue-50); color: var(--blue-700); display: grid; place-items: center; margin-bottom: 16px; }
.scene-card .s-icon svg { width: 26px; height: 26px; }
.scene-card h3 { font-size: 18px; color: var(--blue-900); margin-bottom: 10px; }
.scene-card p { font-size: 14px; color: var(--gray-500); }

.value-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.value-4 .v-item { text-align: center; padding: 30px 20px; background: var(--white); border: 1px solid var(--gray-100); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); }
.value-4 .v-num { font-size: 30px; font-weight: 700; color: var(--blue-700); margin-bottom: 8px; }
.value-4 .v-item h4 { font-size: 16px; color: var(--blue-900); margin-bottom: 8px; }
.value-4 .v-item p { font-size: 14px; color: var(--gray-500); }

/* ============ 合作案例 ============ */
.case-detail {
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  margin-bottom: 32px;
}
.case-detail:last-child { margin-bottom: 0; }
.case-head {
  display: flex; align-items: center; gap: 18px; flex-wrap: wrap;
  padding: 30px 36px;
  background: linear-gradient(135deg, var(--blue-800), var(--blue-600));
  color: #fff;
}
.case-head .c-no { width: 46px; height: 46px; border-radius: 12px; background: rgba(255,255,255,.18); display: grid; place-items: center; font-size: 18px; font-weight: 700; }
.case-head h2 { font-size: 24px; font-weight: 700; }
.case-head .c-tag { font-size: 13px; background: rgba(255,255,255,.16); padding: 4px 12px; border-radius: 999px; }
.case-head .c-sum { width: 100%; font-size: 15px; color: #D6E8FA; }
.case-body { padding: 8px 36px 32px; }
.case-row { display: grid; grid-template-columns: 150px 1fr; gap: 20px; padding: 20px 0; border-bottom: 1px solid var(--gray-100); }
.case-row:last-child { border-bottom: none; }
.case-row .c-label { font-size: 15px; font-weight: 600; color: var(--blue-700); display: flex; align-items: center; gap: 8px; }
.case-row .c-label .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--blue-500); }
.case-row .c-text { font-size: 15px; color: var(--gray-700); }
.case-row .c-text ul li { padding-left: 18px; position: relative; margin-bottom: 6px; }
.case-row .c-text ul li::before { content: ""; position: absolute; left: 0; top: 9px; width: 6px; height: 6px; border-radius: 50%; background: var(--blue-500); }
.case-row .c-metric { display: inline-block; font-size: 14px; font-weight: 600; color: var(--blue-700); background: var(--blue-50); padding: 3px 10px; border-radius: 6px; margin: 0 8px 8px 0; }

/* ============ 合作伙伴 ============ */
.partner-cat { margin-bottom: 56px; }
.partner-cat:last-child { margin-bottom: 0; }
.partner-cat .pc-head { display: flex; align-items: baseline; gap: 14px; margin-bottom: 26px; }
.partner-cat .pc-head h2 { font-size: 24px; color: var(--blue-900); font-weight: 600; }
.partner-cat .pc-head .pc-count { font-size: 14px; color: var(--gray-500); }
.partner-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.partner-card {
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-lg);
  padding: 26px 22px;
  box-shadow: var(--shadow-sm);
  transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
}
.partner-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: var(--blue-100); }
.partner-card .p-logo {
  height: 54px; display: flex; align-items: center; justify-content: center;
  font-size: 19px; font-weight: 700; color: var(--blue-700);
  background: var(--blue-50); border-radius: 12px; margin-bottom: 16px;
}
.partner-card h3 { font-size: 17px; color: var(--blue-900); margin-bottom: 6px; }
.partner-card .p-desc { font-size: 13px; color: var(--gray-500); margin-bottom: 14px; min-height: 34px; }
.partner-card .p-dir { font-size: 12px; color: var(--blue-700); background: var(--blue-50); padding: 4px 10px; border-radius: 6px; display: inline-block; }

/* ============ 联系我们优化 ============ */
.contact-hint { font-size: 14px; color: var(--gray-500); margin-bottom: 18px; }
.contact-channels { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 28px; }
.contact-channels .cc {
  text-align: center; padding: 22px 14px; background: var(--white);
  border: 1px solid var(--gray-100); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm);
}
.contact-channels .cc .cc-ico { width: 44px; height: 44px; border-radius: 12px; background: var(--blue-50); color: var(--blue-700); display: grid; place-items: center; margin: 0 auto 12px; }
.contact-channels .cc .cc-label { font-size: 13px; color: var(--gray-500); }
.contact-channels .cc .cc-val { font-size: 16px; color: var(--blue-900); font-weight: 600; }

/* ============ 响应式：新增组件 ============ */
@media (max-width: 992px) {
  .cap-grid, .scene-grid { grid-template-columns: repeat(2, 1fr); }
  .value-4 { grid-template-columns: repeat(2, 1fr); }
  .partner-grid { grid-template-columns: repeat(3, 1fr); }
  .contact-channels { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .cap-grid, .scene-grid, .value-4, .partner-grid { grid-template-columns: 1fr; }
  .case-row { grid-template-columns: 1fr; gap: 6px; }
  .case-head, .case-body { padding-left: 22px; padding-right: 22px; }
  .contact-channels { grid-template-columns: 1fr; }
}

/* ============ 首页案例预览卡片 ============ */
.case-tag { display: inline-block; font-size: 12px; font-weight: 600; color: var(--blue-700); background: var(--blue-50); padding: 3px 10px; border-radius: 999px; margin-bottom: 12px; }
.card .case-metrics { margin: 14px 0 12px; display: flex; flex-wrap: wrap; gap: 8px; }
.card .case-metrics span { font-size: 13px; font-weight: 600; color: var(--blue-700); background: var(--blue-50); padding: 4px 10px; border-radius: 6px; }
.card-link { display: inline-block; margin-top: 4px; font-size: 14px; font-weight: 600; color: var(--blue-700); text-decoration: none; }
.card-link:hover { text-decoration: underline; }