/* =========================================================
   深圳市金华信电子有限公司 · 官网样式
   ========================================================= */

:root {
  --ink: #070d18;
  --navy: #0b1526;
  --navy-2: #101f36;
  --paper: #f5f7fa;
  --white: #ffffff;
  --text: #1b2432;
  --text-soft: #55627a;
  --line: #e3e8f0;
  --cyan: #22d3ee;
  --blue: #2f6bff;
  --blue-dark: #1d4ed8;
  --gold: #f5a524;
  --radius: 14px;
  --radius-lg: 22px;
  --shadow-sm: 0 2px 8px rgba(11, 21, 38, .06);
  --shadow: 0 14px 40px rgba(11, 21, 38, .10);
  --shadow-lg: 0 28px 70px rgba(11, 21, 38, .18);
  --container: 1200px;
  --header-h: 72px;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.75;
  font-size: 16px;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }

a { color: var(--blue-dark); text-decoration: none; }
a:hover { color: var(--blue); }

h1, h2, h3, h4 {
  margin: 0 0 .5em;
  line-height: 1.3;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -.01em;
}

h1 { font-size: clamp(2rem, 4.4vw, 3.4rem); line-height: 1.2; }
h2 { font-size: clamp(1.5rem, 2.6vw, 2.25rem); }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1em; }

ul, ol { margin: 0 0 1em; padding-left: 1.2em; }

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

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

/* ---------- 顶部信息条 ---------- */
.topbar {
  background: var(--navy);
  color: #b9c7dd;
  font-size: .82rem;
  letter-spacing: .02em;
}
.topbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 38px;
  flex-wrap: wrap;
}
.topbar p { margin: 0; }
.topbar a { color: #dbe6f7; }
.topbar a:hover { color: var(--cyan); }
.topbar-links { display: flex; gap: 18px; align-items: center; }

/* ---------- 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
  transition: box-shadow .3s var(--ease);
}
.site-header.is-stuck { box-shadow: 0 8px 30px rgba(11, 21, 38, .08); }
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: var(--header-h);
}
.logo {
  display: flex;
  align-items: center;
  gap: 11px;
  color: var(--ink);
  flex-shrink: 0;
}
.logo:hover { color: var(--ink); }
.logo-mark { width: 40px; height: 40px; flex: 0 0 auto; }
.logo-text { display: flex; flex-direction: column; line-height: 1.15; }
.logo-text strong { font-size: 1.06rem; letter-spacing: .04em; }
.logo-text span {
  font-size: .66rem;
  letter-spacing: .16em;
  color: var(--text-soft);
  text-transform: uppercase;
}

.nav { display: flex; align-items: center; gap: 4px; }
.nav a {
  position: relative;
  display: inline-block;
  padding: 9px 14px;
  font-size: .95rem;
  color: #33415c;
  border-radius: 8px;
  transition: color .2s, background .2s;
}
.nav a:hover { color: var(--blue-dark); background: #f0f5ff; }
.nav a[aria-current="page"] { color: var(--blue-dark); font-weight: 600; }
.nav a[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 14px; right: 14px; bottom: 3px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--blue), var(--cyan));
}

.header-cta { display: flex; align-items: center; gap: 12px; }
.header-phone {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  text-align: right;
  font-size: .72rem;
  color: var(--text-soft);
}
.header-phone strong { font-size: .98rem; color: var(--ink); letter-spacing: .02em; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 10px;
  font-size: .95rem;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .2s var(--ease), box-shadow .2s, background .2s, color .2s;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: linear-gradient(120deg, var(--blue), #4d8bff);
  color: #fff;
  box-shadow: 0 10px 24px rgba(47, 107, 255, .28);
}
.btn-primary:hover { color: #fff; box-shadow: 0 14px 30px rgba(47, 107, 255, .38); }
.btn-ghost {
  background: rgba(255, 255, 255, .08);
  color: #fff;
  border-color: rgba(255, 255, 255, .35);
}
.btn-ghost:hover { background: rgba(255, 255, 255, .16); color: #fff; }
.btn-outline {
  background: #fff;
  color: var(--ink);
  border-color: var(--line);
}
.btn-outline:hover { border-color: var(--blue); color: var(--blue-dark); }

.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  cursor: pointer;
  padding: 0;
}
.nav-toggle span {
  display: block;
  width: 20px; height: 2px;
  margin: 4px auto;
  background: var(--ink);
  border-radius: 2px;
  transition: transform .25s, opacity .25s;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: #060c16;
  color: #eaf2ff;
  padding: clamp(64px, 9vw, 116px) 0 clamp(56px, 7vw, 96px);
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -2;
}
.hero-bg img {
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: .46;
  filter: saturate(.7) contrast(1.05);
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(900px 480px at 78% 18%, rgba(34, 211, 238, .18), transparent 65%),
    radial-gradient(700px 500px at 8% 82%, rgba(47, 107, 255, .22), transparent 60%),
    linear-gradient(180deg, rgba(6, 12, 22, .55) 0%, rgba(6, 12, 22, .86) 60%, #060c16 100%);
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
  gap: clamp(32px, 5vw, 64px);
  align-items: center;
}
.hero .eyebrow { color: var(--cyan); }
.hero h1 { color: #fff; margin-bottom: .35em; }
.hero h1 em {
  font-style: normal;
  background: linear-gradient(100deg, #7dd3fc, #22d3ee 45%, #a5b4fc);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-lead {
  font-size: clamp(1rem, 1.25vw, 1.13rem);
  color: #b7c7e0;
  max-width: 34em;
  margin-bottom: 1.6em;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 34px; }
.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  max-width: 560px;
}
.hero-stat {
  padding: 16px 18px;
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: 12px;
  background: rgba(255, 255, 255, .04);
}
.hero-stat b {
  display: block;
  font-size: 1.5rem;
  color: #fff;
  line-height: 1.2;
  letter-spacing: -.01em;
}
.hero-stat span { font-size: .78rem; color: #93a7c4; }

.hero-visual { position: relative; }
.hero-frame {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, .16);
  box-shadow: 0 40px 90px rgba(0, 0, 0, .45);
  aspect-ratio: 4 / 3.4;
}
.hero-frame img { width: 100%; height: 100%; object-fit: cover; }
.hero-frame::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 45%, rgba(6, 12, 22, .75));
}
.hero-badge {
  position: absolute;
  left: 16px; bottom: 16px;
  right: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: 12px;
  background: rgba(10, 20, 35, .72);
  border: 1px solid rgba(255, 255, 255, .14);
  backdrop-filter: blur(8px);
  font-size: .82rem;
  color: #cfe0f5;
}
.hero-badge .dot {
  width: 9px; height: 9px;
  border-radius: 50%;
  background: #34d399;
  box-shadow: 0 0 0 4px rgba(52, 211, 153, .18);
  flex: 0 0 auto;
}

/* ---------- 通用区块 ---------- */
.section { padding: clamp(56px, 7vw, 96px) 0; }
.section.tint { background: var(--paper); }
.section.dark { background: var(--navy); color: #c7d5ea; }
.section.dark h2, .section.dark h3 { color: #fff; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--blue-dark);
  margin-bottom: 14px;
}
.eyebrow::before {
  content: "";
  width: 26px; height: 2px;
  background: linear-gradient(90deg, var(--blue), var(--cyan));
  border-radius: 2px;
}
.section-head { max-width: 760px; margin-bottom: clamp(32px, 4vw, 52px); }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head.center .eyebrow { justify-content: center; }
.section-head p { color: var(--text-soft); margin-bottom: 0; font-size: 1.02rem; }
.section.dark .section-head p { color: #a9bdd8; }

/* ---------- 优势卡片 ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}
.feature {
  position: relative;
  padding: 28px 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s;
  overflow: hidden;
}
.feature::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 3px;
  background: linear-gradient(90deg, var(--blue), var(--cyan));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .35s var(--ease);
}
.feature:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: #cfdcf5; }
.feature:hover::after { transform: scaleX(1); }
.feature-icon {
  width: 46px; height: 46px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: linear-gradient(135deg, #eef4ff, #e6fbff);
  color: var(--blue-dark);
  margin-bottom: 18px;
}
.feature-icon svg { width: 24px; height: 24px; }
.feature h3 { margin-bottom: .45em; }
.feature p { margin: 0; color: var(--text-soft); font-size: .94rem; }

/* ---------- 产品 ---------- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}
.product-card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease), border-color .3s;
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: #cfdcf5; }
.product-media {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: #0d1a2b;
}
.product-media img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .6s var(--ease);
}
.product-card:hover .product-media img { transform: scale(1.06); }
.product-tag {
  position: absolute;
  top: 14px; left: 14px;
  padding: 4px 10px;
  border-radius: 6px;
  font-size: .72rem;
  letter-spacing: .06em;
  color: #dff6ff;
  background: rgba(6, 18, 32, .72);
  border: 1px solid rgba(255, 255, 255, .18);
  backdrop-filter: blur(6px);
}
.product-body { padding: 22px 22px 24px; display: flex; flex-direction: column; flex: 1; }
.product-body h3 { margin-bottom: .5em; }
.product-body p { color: var(--text-soft); font-size: .92rem; margin-bottom: 1.1em; }
.product-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}
.chip {
  padding: 4px 10px;
  border-radius: 999px;
  background: #f1f5fc;
  color: #445069;
  font-size: .74rem;
  border: 1px solid #e6ecf7;
}
.product-link {
  margin-top: auto;
  font-size: .9rem;
  font-weight: 600;
  color: var(--blue-dark);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.product-link:hover { gap: 10px; }

/* ---------- 关于 ---------- */
.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(32px, 5vw, 64px);
  align-items: center;
}
.about-media {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  aspect-ratio: 4 / 3.2;
}
.about-media img { width: 100%; height: 100%; object-fit: cover; }
.about-media .badge-card {
  position: absolute;
  right: 18px; bottom: 18px;
  padding: 14px 18px;
  border-radius: 12px;
  background: rgba(255, 255, 255, .94);
  box-shadow: var(--shadow);
  line-height: 1.3;
}
.badge-card b { display: block; font-size: 1.35rem; color: var(--ink); }
.badge-card span { font-size: .76rem; color: var(--text-soft); }

.about-copy p { color: var(--text-soft); }
.check-list { list-style: none; padding: 0; margin: 0 0 26px; }
.check-list li {
  position: relative;
  padding-left: 30px;
  margin-bottom: 12px;
  color: #33415c;
  font-size: .96rem;
}
.check-list li::before {
  content: "";
  position: absolute;
  left: 0; top: .45em;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: #e8f2ff url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%231d4ed8' stroke-width='3.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E") center/12px no-repeat;
}

/* ---------- 品牌 ---------- */
.brand-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 14px;
}
.brand-item {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 74px;
  padding: 10px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  font-weight: 700;
  font-size: .95rem;
  letter-spacing: .04em;
  color: #33415c;
  text-align: center;
  transition: border-color .25s, color .25s, transform .25s;
}
.brand-item:hover { border-color: var(--blue); color: var(--blue-dark); transform: translateY(-3px); }
.brand-item small { display: block; font-size: .68rem; font-weight: 500; color: #8b98ad; letter-spacing: .02em; }

/* ---------- 流程 ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
  counter-reset: step;
}
.step {
  position: relative;
  padding: 26px 22px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, .04);
  border: 1px solid rgba(255, 255, 255, .1);
}
.step::before {
  counter-increment: step;
  content: "0" counter(step);
  display: block;
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--cyan);
  letter-spacing: .04em;
  margin-bottom: 12px;
}
.step h3 { font-size: 1.02rem; margin-bottom: .4em; }
.step p { margin: 0; font-size: .9rem; color: #a9bdd8; }

/* ---------- 数据条 ---------- */
.stats-band {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
  padding: 36px clamp(20px, 4vw, 44px);
  border-radius: var(--radius-lg);
  background: linear-gradient(120deg, #0b1526, #12233d 60%, #0d2b40);
  color: #fff;
  box-shadow: var(--shadow-lg);
}
.stats-band div { text-align: center; }
.stats-band b {
  display: block;
  font-size: clamp(1.6rem, 3vw, 2.3rem);
  line-height: 1.1;
  background: linear-gradient(100deg, #fff, #7dd3fc);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stats-band span { font-size: .82rem; color: #9fb4d0; }

/* ---------- FAQ ---------- */
.faq { max-width: 860px; margin: 0 auto; }
.faq details {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0 20px;
  margin-bottom: 12px;
  transition: border-color .25s, box-shadow .25s;
}
.faq details[open] { border-color: #c6d8f7; box-shadow: var(--shadow-sm); }
.faq summary {
  list-style: none;
  cursor: pointer;
  padding: 18px 34px 18px 0;
  font-weight: 600;
  color: var(--ink);
  position: relative;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "";
  position: absolute;
  right: 4px; top: 50%;
  width: 10px; height: 10px;
  border-right: 2px solid #8496b1;
  border-bottom: 2px solid #8496b1;
  transform: translateY(-70%) rotate(45deg);
  transition: transform .25s;
}
.faq details[open] summary::after { transform: translateY(-30%) rotate(-135deg); }
.faq .faq-body { padding: 0 0 18px; color: var(--text-soft); font-size: .95rem; }
.faq .faq-body p:last-child { margin-bottom: 0; }

/* ---------- CTA ---------- */
.cta-band {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  padding: clamp(34px, 5vw, 56px);
  background:
    radial-gradient(600px 260px at 88% 10%, rgba(34, 211, 238, .25), transparent 70%),
    linear-gradient(120deg, #0a1424, #16305a);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}
.cta-band h2 { color: #fff; margin-bottom: .3em; }
.cta-band p { color: #b9cbe4; margin: 0; max-width: 46em; }
.cta-actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* ---------- 内页头 ---------- */
.page-hero {
  position: relative;
  padding: clamp(52px, 7vw, 88px) 0 clamp(44px, 6vw, 72px);
  background:
    radial-gradient(700px 320px at 82% 8%, rgba(34, 211, 238, .18), transparent 65%),
    linear-gradient(140deg, #08111f, #102038 65%, #0c2135);
  color: #fff;
  overflow: hidden;
}
.page-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, .045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .045) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(circle at 70% 20%, #000, transparent 78%);
  pointer-events: none;
}
.page-hero .container { position: relative; z-index: 1; }
.page-hero h1 { color: #fff; margin-bottom: .4em; }
.page-hero p { color: #b7c7e0; max-width: 52em; margin: 0; font-size: 1.02rem; }
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: .8rem;
  color: #8fa3c1;
  margin-bottom: 18px;
}
.breadcrumb a { color: #b8cbe6; }
.breadcrumb a:hover { color: var(--cyan); }
.breadcrumb span[aria-current] { color: #7f93b1; }

/* ---------- 内容排版 ---------- */
.prose { max-width: 820px; }
.prose h2 { margin-top: 1.6em; }
.prose h2:first-child { margin-top: 0; }
.prose p, .prose li { color: #3c4a63; }
.prose ul { padding-left: 1.3em; }
.prose ul li { margin-bottom: .4em; }

.info-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}
.info-card {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}
.info-card h3 { margin-bottom: .5em; }
.info-card p { color: var(--text-soft); margin-bottom: 0; font-size: .95rem; }
.info-card ul { margin: 0; padding-left: 1.1em; color: var(--text-soft); font-size: .95rem; }

/* ---------- 时间线 ---------- */
.timeline { position: relative; margin: 0; padding: 0 0 0 28px; list-style: none; }
.timeline::before {
  content: "";
  position: absolute;
  left: 7px; top: 8px; bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--blue), var(--cyan));
  opacity: .35;
}
.timeline li { position: relative; padding-bottom: 26px; }
.timeline li::before {
  content: "";
  position: absolute;
  left: -28px; top: 8px;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--blue);
}
.timeline b { display: block; color: var(--blue-dark); font-size: .88rem; letter-spacing: .04em; }
.timeline h3 { font-size: 1.02rem; margin: .2em 0 .3em; }
.timeline p { margin: 0; color: var(--text-soft); font-size: .93rem; }

/* ---------- 联系 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
}
.contact-list { list-style: none; padding: 0; margin: 0 0 28px; }
.contact-list li {
  display: flex;
  gap: 14px;
  padding: 16px 0;
  border-bottom: 1px dashed var(--line);
}
.contact-list li:last-child { border-bottom: 0; }
.contact-ico {
  flex: 0 0 auto;
  width: 40px; height: 40px;
  display: grid; place-items: center;
  border-radius: 10px;
  background: #eff5ff;
  color: var(--blue-dark);
}
.contact-ico svg { width: 20px; height: 20px; }
.contact-list b { display: block; font-size: .78rem; color: #8b98ad; font-weight: 500; letter-spacing: .06em; }
.contact-list a, .contact-list span { color: var(--ink); font-size: .98rem; word-break: break-all; }
.contact-list a:hover { color: var(--blue-dark); }

.form-card {
  padding: clamp(24px, 3vw, 36px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: #fff;
  box-shadow: var(--shadow-sm);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { margin-bottom: 16px; }
.field label { display: block; font-size: .85rem; font-weight: 600; margin-bottom: 6px; color: #33415c; }
.field label .req { color: #e5484d; }
.field input, .field textarea, .field select {
  width: 100%;
  padding: 11px 13px;
  border: 1px solid #d8e0ec;
  border-radius: 9px;
  font: inherit;
  font-size: .93rem;
  color: var(--text);
  background: #fff;
  transition: border-color .2s, box-shadow .2s;
}
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(47, 107, 255, .14);
}
.field textarea { resize: vertical; min-height: 110px; }
.form-note { font-size: .78rem; color: #8b98ad; margin-top: 10px; }
.form-msg {
  display: none;
  margin-top: 14px;
  padding: 12px 14px;
  border-radius: 9px;
  background: #ecfdf5;
  border: 1px solid #a7f3d0;
  color: #065f46;
  font-size: .88rem;
}
.form-msg.is-visible { display: block; }

.map-frame {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  background: #eef2f8;
}
.map-frame img { width: 100%; height: auto; }

/* ---------- 页脚 ---------- */
.site-footer {
  background: #060d18;
  color: #93a6c2;
  padding: clamp(48px, 6vw, 72px) 0 0;
  font-size: .92rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 44px;
}
.site-footer h3 {
  color: #fff;
  font-size: .95rem;
  letter-spacing: .08em;
  margin-bottom: 18px;
  text-transform: uppercase;
}
.site-footer a { color: #a9bdd8; }
.site-footer a:hover { color: var(--cyan); }
.footer-brand .logo { color: #fff; margin-bottom: 16px; }
.footer-brand .logo-text span { color: #7c8ea8; }
.footer-brand p { color: #8ea1bd; max-width: 30em; font-size: .9rem; }
.footer-links { list-style: none; padding: 0; margin: 0; }
.footer-links li { margin-bottom: 10px; }
.footer-contact { list-style: none; padding: 0; margin: 0; }
.footer-contact li { margin-bottom: 12px; display: flex; gap: 10px; align-items: flex-start; }
.footer-contact svg { width: 16px; height: 16px; margin-top: 4px; flex: 0 0 auto; color: var(--cyan); }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .08);
  padding: 18px 0 22px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  font-size: .82rem;
  color: #6f81a0;
}

/* ---------- 浮动联系 ---------- */
.float-contact {
  position: fixed;
  right: 18px; bottom: 22px;
  z-index: 50;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.float-contact a {
  width: 46px; height: 46px;
  display: grid; place-items: center;
  border-radius: 50%;
  background: #fff;
  color: var(--blue-dark);
  box-shadow: 0 8px 24px rgba(11, 21, 38, .18);
  border: 1px solid var(--line);
  transition: transform .2s, background .2s, color .2s;
}
.float-contact a:hover { transform: translateY(-3px); background: var(--blue); color: #fff; }
.float-contact svg { width: 21px; height: 21px; }

/* ---------- 动效 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
.reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  * { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .feature-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .product-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .brand-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .header-phone { display: none; }
}

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { max-width: 560px; }
  .about-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .nav {
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 14px 20px 22px;
    background: #fff;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 20px 40px rgba(11, 21, 38, .12);
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: opacity .25s, transform .25s;
    max-height: calc(100vh - var(--header-h) - 12px);
    overflow-y: auto;
  }
  .nav.is-open { opacity: 1; transform: none; pointer-events: auto; }
  .nav a { padding: 13px 12px; font-size: 1rem; border-bottom: 1px solid #f0f3f9; border-radius: 0; }
  .nav a[aria-current="page"]::after { display: none; }
  .nav-toggle { display: block; }
  .header-cta .btn { display: none; }
  .topbar-links { display: none; }
  .topbar .container { justify-content: center; }
}

@media (max-width: 640px) {
  body { font-size: 15.5px; }
  .container { padding: 0 18px; }
  .feature-grid, .product-grid, .brand-grid, .steps, .info-grid, .stats-band { grid-template-columns: 1fr; }
  .brand-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hero-stats { grid-template-columns: 1fr 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .cta-band { flex-direction: column; align-items: flex-start; }
  .float-contact { right: 12px; bottom: 14px; }
  .stats-band { gap: 26px; }
  .stats-band div { text-align: left; }
}