/* ==========================================================================
   苏州库纳森暖通设备工程有限公司 · 官网样式
   纯静态站点，无外部依赖（不加载任何 CDN / 在线字体）
   ========================================================================== */

/* ---------- 设计变量 ---------- */
:root {
  --navy:      #0A2540;
  --navy-600:  #10365F;
  --navy-400:  #1B4E82;
  --blue:      #1667D6;
  --blue-400:  #3D8BF2;
  --cyan:      #13A8B8;

  --ink:       #16202C;
  --body:      #4A5A6B;
  --muted:     #7B8A99;
  --line:      #E4EAF1;
  --soft:      #F4F8FC;
  --white:     #FFFFFF;

  --radius:    10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 3px rgba(10, 37, 64, .06), 0 1px 2px rgba(10, 37, 64, .04);
  --shadow:    0 4px 20px rgba(10, 37, 64, .07);
  --shadow-lg: 0 16px 44px rgba(10, 37, 64, .12);

  --container: 1200px;
  --header-h:  72px;

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

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

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 16px); }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--body);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  margin: 0 0 .6em;
  color: var(--ink);
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: -.01em;
}

h1 { font-size: clamp(1.85rem, 4.4vw, 3rem); }
h2 { font-size: clamp(1.5rem, 2.8vw, 2.15rem); }
h3 { font-size: clamp(1.15rem, 1.7vw, 1.35rem); }

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

a { color: var(--blue); text-decoration: none; transition: color .18s ease; }
a:hover { color: var(--blue-400); }

img { max-width: 100%; height: auto; display: block; }
ul { margin: 0; padding: 0; list-style: none; }

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

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

.section { padding: clamp(56px, 8vw, 96px) 0; }
.section--soft { background: var(--soft); }
.section--navy { background: var(--navy); color: #C9D8E8; }
.section--navy h2, .section--navy h3 { color: #fff; }

.grid { display: grid; gap: 24px; }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

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

/* ---------- 区块标题 ---------- */
.section-head { max-width: 720px; margin: 0 auto clamp(36px, 5vw, 56px); text-align: center; }
.section-head--left { margin-left: 0; text-align: left; }

.eyebrow {
  display: inline-block;
  margin-bottom: 14px;
  padding: 5px 14px;
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--blue);
  background: rgba(22, 103, 214, .08);
  border-radius: 100px;
}
.section--navy .eyebrow { color: #7FC4FF; background: rgba(127, 196, 255, .12); }

.section-head p { font-size: 1.05rem; color: var(--muted); }
.section--navy .section-head p { color: #9FB6CC; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 13px 28px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-size: .97rem;
  font-weight: 600;
  font-family: inherit;
  line-height: 1.4;
  cursor: pointer;
  transition: all .2s ease;
  white-space: nowrap;
}
.btn svg { width: 17px; height: 17px; flex-shrink: 0; }

.btn--primary { background: var(--blue); color: #fff; box-shadow: 0 4px 14px rgba(22, 103, 214, .3); }
.btn--primary:hover { background: #1259BC; color: #fff; transform: translateY(-1px); box-shadow: 0 8px 22px rgba(22, 103, 214, .38); }

.btn--ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn--ghost:hover { border-color: var(--blue); color: var(--blue); }

.btn--light { background: rgba(255, 255, 255, .12); color: #fff; border-color: rgba(255, 255, 255, .3); backdrop-filter: blur(6px); }
.btn--light:hover { background: #fff; color: var(--navy); }

.btn--white { background: #fff; color: var(--navy); }
.btn--white:hover { background: #EAF2FC; color: var(--navy); transform: translateY(-1px); }

.btn--sm { padding: 9px 18px; font-size: .9rem; }

/* ---------- 顶部信息条 ---------- */
.topbar {
  background: var(--navy);
  color: #A9C0D8;
  font-size: .85rem;
  border-bottom: 1px solid rgba(255, 255, 255, .07);
}
.topbar .container { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 38px; }
.topbar a { color: #A9C0D8; }
.topbar a:hover { color: #fff; }
.topbar-list { display: flex; gap: 22px; flex-wrap: wrap; }
.topbar-list li { display: flex; align-items: center; gap: 6px; }
.topbar-list svg { width: 14px; height: 14px; opacity: .75; }
.topbar-tag { color: #7FC4FF; font-weight: 600; letter-spacing: .04em; }

/* ---------- 导航 ---------- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, .95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  transition: box-shadow .25s ease;
}
.header.is-stuck { box-shadow: 0 2px 16px rgba(10, 37, 64, .08); }

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: var(--header-h);
}

.logo { display: flex; align-items: center; gap: 12px; }
.logo:hover { color: inherit; }

.logo-mark {
  width: 40px; height: 40px;
  flex-shrink: 0;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--navy) 0%, var(--blue) 100%);
  display: grid;
  place-items: center;
  color: #fff;
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -.02em;
}

.logo-text { line-height: 1.25; }
.logo-cn { display: block; font-size: 1.02rem; font-weight: 700; color: var(--ink); letter-spacing: .01em; }
.logo-en { display: block; font-size: .68rem; font-weight: 600; color: var(--muted); letter-spacing: .16em; text-transform: uppercase; }

.nav { display: flex; align-items: center; gap: 4px; }
.nav a {
  position: relative;
  padding: 9px 15px;
  border-radius: 7px;
  font-size: .95rem;
  font-weight: 500;
  color: var(--body);
  transition: all .18s ease;
}
.nav a:hover { color: var(--blue); background: var(--soft); }
.nav a.is-active { color: var(--blue); font-weight: 600; }
.nav a.is-active::after {
  content: '';
  position: absolute;
  left: 15px; right: 15px; bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: var(--blue);
}

.header-cta { display: flex; align-items: center; gap: 12px; }

.nav-toggle {
  display: none;
  width: 42px; height: 42px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  width: 18px; height: 2px;
  margin: 4px auto;
  border-radius: 2px;
  background: var(--ink);
  transition: all .25s ease;
}
.nav-toggle.is-open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ---------- 首页主视觉 ---------- */
.hero {
  position: relative;
  overflow: hidden;
  background: var(--navy);
  color: #D6E4F2;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background: url('../images/image1.png') center / cover no-repeat;
  opacity: .38;
}
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(10, 37, 64, .96) 0%, rgba(10, 37, 64, .82) 45%, rgba(16, 54, 95, .55) 100%);
}
.hero .container { position: relative; z-index: 2; }

.hero-inner {
  padding: clamp(64px, 9vw, 118px) 0 clamp(48px, 6vw, 76px);
  max-width: 730px;
}
.hero h1 { color: #fff; margin-bottom: 20px; }
.hero h1 .accent { color: #7FC4FF; }
.hero-lead { font-size: clamp(1rem, 1.35vw, 1.12rem); color: #B9CDE2; margin-bottom: 32px; max-width: 620px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.hero-facts {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: rgba(255, 255, 255, .1);
  border-top: 1px solid rgba(255, 255, 255, .12);
}
.hero-facts li {
  padding: 26px 24px;
  background: rgba(10, 37, 64, .5);
}
.hero-facts strong {
  display: block;
  font-size: clamp(1.3rem, 2.2vw, 1.75rem);
  font-weight: 700;
  color: #fff;
  line-height: 1.2;
}
.hero-facts span { font-size: .85rem; color: #9FB6CC; }

/* ---------- 页面头（内页） ---------- */
.page-hero {
  position: relative;
  padding: clamp(52px, 7vw, 84px) 0 clamp(46px, 6vw, 68px);
  background: linear-gradient(120deg, var(--navy) 0%, var(--navy-400) 100%);
  color: #B9CDE2;
  overflow: hidden;
}
.page-hero::after {
  content: '';
  position: absolute;
  top: -140px; right: -80px;
  width: 460px; height: 460px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(61, 139, 242, .28) 0%, transparent 68%);
}
.page-hero .container { position: relative; z-index: 2; }
.page-hero h1 { color: #fff; margin-bottom: 12px; }
.page-hero p { max-width: 680px; margin: 0; font-size: 1.03rem; }

.breadcrumb { display: flex; gap: 8px; font-size: .88rem; color: #8AA6C0; margin-bottom: 14px; }
.breadcrumb a { color: #8AA6C0; }
.breadcrumb a:hover { color: #fff; }
.breadcrumb span { opacity: .5; }

/* ---------- 卡片 ---------- */
.card {
  padding: 30px 26px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: all .22s ease;
}
.card:hover { border-color: rgba(22, 103, 214, .35); box-shadow: var(--shadow); transform: translateY(-3px); }
.card h3 { margin-bottom: 10px; }
.card p { font-size: .94rem; margin: 0; }

.card-icon {
  width: 48px; height: 48px;
  margin-bottom: 18px;
  border-radius: 11px;
  display: grid;
  place-items: center;
  background: rgba(22, 103, 214, .09);
  color: var(--blue);
}
.card-icon svg { width: 24px; height: 24px; }

/* ---------- 产品卡（带图） ---------- */
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }

.product-card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all .25s ease;
}
.product-card:hover { border-color: rgba(22, 103, 214, .35); box-shadow: var(--shadow-lg); transform: translateY(-4px); }

.product-media {
  position: relative;
  aspect-ratio: 4 / 3;
  background: var(--soft);
  overflow: hidden;
}
.product-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.product-card:hover .product-media img { transform: scale(1.05); }

.product-badge {
  position: absolute;
  top: 14px; left: 14px;
  padding: 4px 11px;
  border-radius: 100px;
  font-size: .75rem;
  font-weight: 600;
  color: #fff;
  background: rgba(10, 37, 64, .78);
  backdrop-filter: blur(4px);
}

.product-body { padding: 24px 24px 26px; display: flex; flex-direction: column; flex: 1; }
.product-body h3 { margin-bottom: 8px; }
.product-body > p { font-size: .93rem; margin-bottom: 16px; }

.spec-list { margin-bottom: 20px; border-top: 1px solid var(--line); }
.spec-list li {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 9px 0;
  border-bottom: 1px solid var(--line);
  font-size: .88rem;
}
.spec-list dt, .spec-list .k { color: var(--muted); flex-shrink: 0; }
.spec-list .v { color: var(--ink); font-weight: 600; text-align: right; }

.product-body .btn { margin-top: auto; align-self: flex-start; }

/* ---------- 规格参数表 ---------- */
.spec-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .92rem;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.spec-table caption {
  padding: 14px 18px;
  text-align: left;
  font-weight: 700;
  color: #fff;
  background: var(--navy);
  font-size: .97rem;
}
.spec-table th, .spec-table td {
  padding: 12px 18px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
.spec-table tr:last-child th, .spec-table tr:last-child td { border-bottom: 0; }
.spec-table th {
  width: 34%;
  font-weight: 500;
  color: var(--muted);
  background: var(--soft);
  white-space: nowrap;
}
.spec-table td { color: var(--ink); font-weight: 600; }

/* ---------- 产品详情块 ---------- */
.product-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
}
.product-detail + .product-detail { margin-top: clamp(48px, 6vw, 80px); }
.product-detail--flip .detail-media { order: 2; }

.detail-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--soft);
}
.detail-media img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }

.detail-tag {
  display: inline-block;
  margin-bottom: 12px;
  padding: 4px 12px;
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--cyan);
  background: rgba(19, 168, 184, .1);
  border-radius: 100px;
}
.detail-body h3 { font-size: clamp(1.3rem, 2.2vw, 1.65rem); margin-bottom: 14px; }
.detail-body > p { margin-bottom: 22px; }

/* ---------- 特性列表 ---------- */
.feature-list { display: grid; gap: 14px; margin-bottom: 24px; }
.feature-list li { display: flex; gap: 12px; font-size: .94rem; align-items: flex-start; }
.feature-list svg {
  width: 20px; height: 20px;
  flex-shrink: 0;
  margin-top: 3px;
  color: var(--blue);
}

/* ---------- 数据条 ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
.stats li { padding: 26px 16px; }
.stats strong {
  display: block;
  font-size: clamp(1.7rem, 3.4vw, 2.5rem);
  font-weight: 800;
  color: var(--blue);
  line-height: 1.15;
  letter-spacing: -.02em;
}
.section--navy .stats strong { color: #7FC4FF; }
.stats span { font-size: .9rem; color: var(--muted); }
.section--navy .stats span { color: #9FB6CC; }

/* ---------- 客户 logo ---------- */
.logo-wall {
  display: grid;
  place-items: center;
  padding: 32px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}
.logo-wall img { max-width: 780px; width: 100%; }

/* ---------- 客户名称标签 ---------- */
.client-tags { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.client-tags li {
  padding: 9px 20px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 100px;
  font-size: .92rem;
  font-weight: 600;
  color: var(--ink);
}

/* ---------- 图文高亮块 ---------- */
.highlight {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(28px, 5vw, 64px);
  align-items: center;
}
.highlight-media { border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--line); }
.highlight-media img { width: 100%; }

/* ---------- 行动号召条 ---------- */
.cta-band {
  position: relative;
  padding: clamp(48px, 6vw, 72px) 0;
  background: linear-gradient(120deg, var(--navy) 0%, var(--navy-400) 100%);
  color: #B9CDE2;
  overflow: hidden;
}
.cta-band::after {
  content: '';
  position: absolute;
  bottom: -180px; left: -100px;
  width: 480px; height: 480px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(61, 139, 242, .3) 0%, transparent 68%);
}
.cta-band .container { position: relative; z-index: 2; }
.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}
.cta-inner h2 { color: #fff; margin-bottom: 8px; }
.cta-inner p { margin: 0; max-width: 560px; }
.cta-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- 联系信息卡 ---------- */
.contact-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.contact-card {
  padding: 32px 28px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all .22s ease;
}
.contact-card:hover { box-shadow: var(--shadow); border-color: rgba(22, 103, 214, .3); }
.contact-card .card-icon { margin: 0 auto 16px; }
.contact-card h3 { font-size: 1.05rem; margin-bottom: 8px; }
.contact-card .value { font-size: 1.12rem; font-weight: 700; color: var(--ink); line-height: 1.5; }
.contact-card .value--phone { font-size: 1.5rem; color: var(--blue); letter-spacing: .01em; }
.contact-card .hint { margin-top: 10px; font-size: .87rem; color: var(--muted); }

/* ---------- 表单 ---------- */
.form-wrap {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: clamp(28px, 4vw, 52px);
  align-items: start;
}
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field { display: flex; flex-direction: column; gap: 7px; }
.field--full { grid-column: 1 / -1; }
.field label { font-size: .9rem; font-weight: 600; color: var(--ink); }
.field .req { color: #D64545; }

.field input, .field textarea, .field select {
  padding: 12px 15px;
  font-family: inherit;
  font-size: .95rem;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  transition: border-color .18s ease, box-shadow .18s ease;
  width: 100%;
}
.field textarea { resize: vertical; min-height: 118px; }
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(22, 103, 214, .12);
}
.field input.is-error, .field textarea.is-error { border-color: #D64545; }
.field .err { font-size: .8rem; color: #D64545; display: none; }
.field .err.is-show { display: block; }

.form-note {
  margin-top: 16px;
  padding: 14px 18px;
  border-radius: 8px;
  font-size: .9rem;
  display: none;
}
.form-note.is-show { display: block; }
.form-note--ok { background: rgba(19, 168, 184, .1); color: #0E7C88; border: 1px solid rgba(19, 168, 184, .25); }
.form-note--err { background: rgba(214, 69, 69, .08); color: #B03030; border: 1px solid rgba(214, 69, 69, .22); }

/* ---- 侧栏：为什么联系我们 ---- */
.aside-card {
  padding: 30px 28px;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}
.aside-card h3 { font-size: 1.08rem; margin-bottom: 18px; }
.aside-card .feature-list { margin-bottom: 0; }
.aside-card .feature-list li { font-size: .92rem; }

/* ---------- 地图/地址块 ---------- */
.address-block {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  flex-wrap: wrap;
  padding: clamp(28px, 4vw, 42px);
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}
.address-block h3 { margin-bottom: 6px; }
.address-block p { margin: 0; color: var(--body); }

/* ---------- 产品页锚点导航 ---------- */
.subnav {
  position: sticky;
  top: var(--header-h);
  z-index: 60;
  background: rgba(255, 255, 255, .96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.subnav .container { display: flex; gap: 6px; overflow-x: auto; padding-top: 10px; padding-bottom: 10px; }
.subnav a {
  flex-shrink: 0;
  padding: 9px 18px;
  border-radius: 100px;
  font-size: .92rem;
  font-weight: 600;
  color: var(--body);
  border: 1px solid transparent;
  transition: all .18s ease;
}
.subnav a:hover { color: var(--blue); background: var(--soft); border-color: var(--line); }

/* ---------- 分类标题 ---------- */
.cat-head {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: clamp(32px, 4vw, 48px);
  padding-bottom: 20px;
  border-bottom: 2px solid var(--line);
}
.cat-head .cat-num {
  flex-shrink: 0;
  width: 46px; height: 46px;
  display: grid;
  place-items: center;
  border-radius: 11px;
  background: var(--navy);
  color: #fff;
  font-size: 1.1rem;
  font-weight: 800;
}
.cat-head h2 { margin: 0 0 4px; }
.cat-head p { margin: 0; font-size: .95rem; color: var(--muted); }

/* ---------- 图集 ---------- */
.gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.gallery figure {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: #fff;
}
.gallery img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.gallery figcaption { padding: 13px 16px; font-size: .88rem; color: var(--muted); }

/* ---------- 无图产品块 ---------- */
.spec-only {
  max-width: 760px;
  margin: 0 auto;
}
.spec-only .detail-tag { margin-bottom: 12px; }
.spec-only h3 { margin-bottom: 10px; }
.spec-only > p { margin-bottom: 22px; }

/* ---------- 页脚 ---------- */
.footer { background: var(--navy); color: #93AAC2; font-size: .92rem; }
.footer-top {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.3fr;
  gap: 40px;
  padding: clamp(48px, 6vw, 72px) 0 44px;
}
.footer h4 { font-size: .95rem; color: #fff; margin-bottom: 18px; letter-spacing: .02em; }
.footer .logo-cn { color: #fff; }
.footer .logo-en { color: #7C93AC; }
.footer .logo { margin-bottom: 18px; }
.footer-about p { color: #8CA3BB; margin-bottom: 18px; line-height: 1.8; }

.footer-links li { margin-bottom: 11px; }
.footer-links a { color: #93AAC2; }
.footer-links a:hover { color: #fff; }

.footer-contact li { display: flex; gap: 10px; margin-bottom: 14px; line-height: 1.65; }
.footer-contact svg { width: 16px; height: 16px; flex-shrink: 0; margin-top: 5px; color: #7FC4FF; }
.footer-contact a { color: #93AAC2; }
.footer-contact a:hover { color: #fff; }

.footer-bottom {
  padding: 22px 0;
  border-top: 1px solid rgba(255, 255, 255, .1);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: .85rem;
  color: #7C93AC;
}
.footer-bottom p { margin: 0; }

/* ---------- 悬浮联系按钮 ---------- */
.float-contact {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 90;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.float-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  border-radius: 100px;
  background: var(--blue);
  color: #fff;
  font-size: .92rem;
  font-weight: 600;
  box-shadow: 0 8px 24px rgba(22, 103, 214, .35);
  transition: all .2s ease;
}
.float-btn:hover { background: #1259BC; color: #fff; transform: translateY(-2px); }
.float-btn svg { width: 17px; height: 17px; }
.float-btn--ghost { background: #fff; color: var(--navy); box-shadow: 0 8px 24px rgba(10, 37, 64, .16); }
.float-btn--ghost:hover { background: var(--soft); color: var(--navy); }

/* ---------- 滚动出现动画 ---------- */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .65s ease, transform .65s ease; }
.reveal.is-visible { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-cards { grid-template-columns: 1fr; }
  .form-wrap { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 32px; }
  .topbar-list { gap: 16px; }
}

@media (max-width: 860px) {
  .nav {
    position: absolute;
    top: 100%; left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 12px 16px 18px;
    background: #fff;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 16px 32px rgba(10, 37, 64, .1);
    display: none;
  }
  .nav.is-open { display: flex; }
  .nav a { padding: 12px 14px; border-radius: 8px; }
  .nav a.is-active::after { display: none; }
  .nav a.is-active { background: var(--soft); }

  .nav-toggle { display: block; }
  .header-cta .btn { display: none; }

  .hero-facts { grid-template-columns: repeat(2, 1fr); }
  .product-detail, .highlight { grid-template-columns: 1fr; }
  .product-detail--flip .detail-media { order: 0; }
  .grid--3, .grid--2 { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); gap: 8px; }
  .spec-table th { width: 40%; }
  .gallery { grid-template-columns: repeat(2, 1fr); }
  .subnav { top: var(--header-h); }
}

@media (max-width: 560px) {
  .container { padding: 0 18px; }
  .topbar-tag { display: none; }
  .topbar .container { justify-content: center; }
  .product-grid { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; }
  .hero-actions .btn, .cta-actions .btn { width: 100%; justify-content: center; }
  .float-contact { right: 14px; bottom: 14px; }
  .float-btn span { display: none; }
  .float-btn { padding: 14px; }
  .spec-table { font-size: .86rem; }
  .spec-table th, .spec-table td { padding: 10px 12px; }
  .client-tags li { font-size: .85rem; padding: 7px 15px; }
  .gallery { grid-template-columns: 1fr; }
  .cat-head { gap: 12px; }
  .cat-head .cat-num { width: 40px; height: 40px; font-size: 1rem; }
}

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

/* ---------- 打印 ---------- */
@media print {
  .header, .topbar, .float-contact, .cta-band, .footer { display: none; }
  body { color: #000; }
}