/* =========================================================
   逸搜官网 - 全局样式表
   浅色科技蓝风 · 纯静态自包含
   ========================================================= */

/* ---------- 设计令牌（浅色） ---------- */
:root {
  --bg-main: #f5f8fc;
  --bg-alt: #eaf1fa;
  --bg-white: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #f0f6ff;
  --bg-soft: #eef3fa;
  --primary: #1e6fff;
  --primary-dark: #0a4fd9;
  --primary-light: #2563eb;
  --accent: #0891b2;
  --accent-bright: #06b6d4;
  --accent-soft: rgba(8, 145, 178, 0.12);
  --text: #0f1f3d;
  --text-muted: #475569;
  --text-dim: #94a3b8;
  --border: #e2e8f0;
  --border-strong: #cbd5e1;
  --border-glow: rgba(30, 111, 255, 0.45);
  --shadow: 0 8px 24px rgba(15, 31, 61, 0.08);
  --shadow-card: 0 4px 18px rgba(15, 31, 61, 0.06);
  --shadow-glow: 0 12px 32px rgba(30, 111, 255, 0.18);
  --radius: 14px;
  --radius-lg: 22px;
  --max-w: 1200px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- 重置 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Microsoft YaHei",
    "PingFang SC", "Helvetica Neue", "Segoe UI", Arial, sans-serif;
  background: var(--bg-main);
  color: var(--text);
  line-height: 1.65;
  font-size: 16px;
  overflow-x: hidden;
  /* 整体背景：浅色 + 蓝色光晕 */
  background-image:
    radial-gradient(1100px 560px at 85% -8%, rgba(30, 111, 255, 0.12), transparent 60%),
    radial-gradient(900px 500px at -5% 5%, rgba(6, 182, 212, 0.10), transparent 55%),
    linear-gradient(180deg, #ffffff 0%, var(--bg-main) 100%);
  background-attachment: fixed;
}

a {
  color: inherit;
  text-decoration: none;
}

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

ul {
  list-style: none;
}

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

.section {
  padding: 96px 0;
  position: relative;
}

.section-alt {
  background: linear-gradient(180deg, transparent, rgba(234, 241, 250, 0.7), transparent);
}

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}

.eyebrow {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 2px;
  color: var(--primary);
  text-transform: uppercase;
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-white);
  margin-bottom: 18px;
  box-shadow: var(--shadow-card);
}

.section-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  letter-spacing: 1px;
  margin-bottom: 16px;
  color: var(--text);
  background: linear-gradient(90deg, var(--text) 0%, var(--primary) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-sub {
  color: var(--text-muted);
  font-size: 16px;
  line-height: 1.8;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease),
    background 0.25s var(--ease);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(90deg, var(--primary) 0%, var(--accent-bright) 100%);
  color: #fff;
  box-shadow: 0 8px 20px rgba(30, 111, 255, 0.32);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 28px rgba(6, 182, 212, 0.42);
}

.btn-ghost {
  background: var(--bg-white);
  color: var(--text);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-card);
}

.btn-ghost:hover {
  border-color: var(--border-glow);
  background: var(--bg-card-hover);
  color: var(--primary);
  transform: translateY(-3px);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 16px;
}

/* ---------- 顶部导航 ---------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 18px 0;
  transition: padding 0.3s var(--ease), background 0.3s var(--ease),
    border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
  border-bottom: 1px solid transparent;
}

.navbar.scrolled {
  padding: 12px 0;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(14px);
  border-bottom-color: var(--border);
  box-shadow: 0 4px 20px rgba(15, 31, 61, 0.06);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 1px;
}

.brand-logo {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--accent-bright));
  display: grid;
  place-items: center;
  color: #fff;
  font-weight: 900;
  font-size: 18px;
  box-shadow: 0 4px 14px rgba(30, 111, 255, 0.4);
}

.brand-name b {
  color: var(--primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-links a {
  position: relative;
  padding: 8px 16px;
  font-size: 15px;
  color: var(--text-muted);
  border-radius: 8px;
  transition: color 0.2s var(--ease);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--primary);
}

.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent-bright));
}

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

.nav-collapse {
  display: none;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
}

.nav-toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

/* Hero 几何网格背景 */
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(30, 111, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 111, 255, 0.08) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(circle at 50% 40%, #000 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(circle at 50% 40%, #000 0%, transparent 70%);
}

.hero-glow {
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.5;
}

.hero-glow.g1 {
  top: -120px;
  right: -80px;
  background: radial-gradient(circle, rgba(30, 111, 255, 0.4), transparent 70%);
  animation: float1 14s ease-in-out infinite;
}

.hero-glow.g2 {
  bottom: -160px;
  left: -100px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.32), transparent 70%);
  animation: float2 18s ease-in-out infinite;
}

@keyframes float1 {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(-30px, 40px); }
}
@keyframes float2 {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(40px, -30px); }
}

.hero-inner {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 860px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 16px;
  border-radius: 999px;
  background: var(--bg-white);
  border: 1px solid var(--border);
  color: var(--primary);
  font-size: 13px;
  margin-bottom: 26px;
  box-shadow: var(--shadow-card);
}

.hero-badge .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-bright);
  box-shadow: 0 0 10px var(--accent-bright);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero-title {
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: 2px;
  margin-bottom: 24px;
  color: var(--text);
}

.hero-title .grad {
  background: linear-gradient(90deg, var(--primary) 0%, var(--accent) 55%, var(--accent-bright) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-sub {
  font-size: clamp(16px, 2vw, 20px);
  color: var(--text-muted);
  line-height: 1.8;
  max-width: 640px;
  margin: 0 auto 38px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin-top: 64px;
  flex-wrap: wrap;
}

.hero-stat .num {
  font-size: 32px;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: 1px;
}

.hero-stat .lbl {
  font-size: 13px;
  color: var(--text-dim);
  margin-top: 4px;
}

/* ---------- 通用卡片 ---------- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-card);
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease),
    box-shadow 0.3s var(--ease), background 0.3s var(--ease);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, transparent, var(--border-glow), transparent);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.3s var(--ease);
}

.card:hover {
  transform: translateY(-8px);
  background: var(--bg-card-hover);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow);
}

.card:hover::before {
  opacity: 1;
}

/* ---------- 业务卡片网格 ---------- */
.biz-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.biz-icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  margin-bottom: 22px;
  background: linear-gradient(135deg, rgba(30, 111, 255, 0.14), rgba(6, 182, 212, 0.10));
  border: 1px solid var(--border);
}

.biz-icon svg {
  width: 32px;
  height: 32px;
  stroke: var(--primary);
  fill: none;
  stroke-width: 1.8;
}

.biz-title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text);
}

.biz-desc {
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 18px;
}

.biz-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  font-size: 12px;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(30, 111, 255, 0.10);
  color: var(--primary);
  border: 1px solid rgba(30, 111, 255, 0.18);
}

/* ---------- 数据统计区 ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.stat-item {
  text-align: center;
  padding: 32px 16px;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
}

.stat-num {
  font-size: clamp(32px, 4vw, 44px);
  font-weight: 800;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: 1px;
}

.stat-suffix {
  font-size: 20px;
  color: var(--primary);
  margin-left: 2px;
}

.stat-label {
  color: var(--text-muted);
  font-size: 14px;
  margin-top: 8px;
}

/* ---------- 优势区 ---------- */
.adv-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.adv-item {
  text-align: center;
  padding: 36px 24px;
}

.adv-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 18px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--primary), var(--accent-bright));
  box-shadow: 0 8px 20px rgba(30, 111, 255, 0.3);
}

.adv-icon svg {
  width: 28px;
  height: 28px;
  stroke: #fff;
  fill: none;
  stroke-width: 1.8;
}

.adv-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text);
}

.adv-desc {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.7;
}

/* ---------- CTA 行动区 ---------- */
.cta {
  text-align: center;
}

.cta-box {
  position: relative;
  padding: 64px 40px;
  border-radius: var(--radius-lg);
  background:
    radial-gradient(600px 300px at 50% 0%, rgba(6, 182, 212, 0.16), transparent 70%),
    linear-gradient(135deg, rgba(30, 111, 255, 0.10), rgba(234, 241, 250, 0.7));
  border: 1px solid var(--border);
  overflow: hidden;
}

.cta-box::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(30, 111, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 111, 255, 0.05) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(circle at 50% 50%, #000, transparent 75%);
  -webkit-mask-image: radial-gradient(circle at 50% 50%, #000, transparent 75%);
}

.cta-title {
  position: relative;
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 800;
  margin-bottom: 14px;
  color: var(--text);
}

.cta-sub {
  position: relative;
  color: var(--text-muted);
  margin-bottom: 30px;
  font-size: 16px;
}

.cta-actions {
  position: relative;
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ---------- 页脚 ---------- */
.footer {
  border-top: 1px solid var(--border);
  background: #ffffff;
  padding: 64px 0 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand .brand {
  margin-bottom: 16px;
}

.footer-about {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.8;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 18px;
  color: var(--text);
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col a {
  color: var(--text-muted);
  font-size: 14px;
  transition: color 0.2s var(--ease);
}

.footer-col a:hover {
  color: var(--primary);
}

.footer-contact li {
  color: var(--text-muted);
  font-size: 14px;
  margin-bottom: 10px;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.footer-contact svg {
  width: 16px;
  height: 16px;
  stroke: var(--primary);
  fill: none;
  stroke-width: 1.8;
  flex-shrink: 0;
  margin-top: 3px;
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  color: var(--text-dim);
  font-size: 13px;
}

.footer-bottom a {
  color: var(--text-dim);
}

.footer-bottom a:hover {
  color: var(--primary);
}

.icp {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.icp::before {
  content: "◆";
  color: var(--primary);
  font-size: 10px;
}

/* ---------- 页面顶部留白（非首页） ---------- */
.page-top {
  padding: 140px 0 60px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-top .hero-grid {
  opacity: 0.6;
}

.breadcrumb {
  display: flex;
  justify-content: center;
  gap: 8px;
  color: var(--text-dim);
  font-size: 13px;
  margin-bottom: 18px;
}

.breadcrumb a:hover {
  color: var(--primary);
}

.page-title {
  font-size: clamp(30px, 5vw, 48px);
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--text);
  background: linear-gradient(90deg, var(--text), var(--primary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-sub {
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 auto;
  font-size: 16px;
  line-height: 1.8;
}

/* ---------- 产品介绍页 ---------- */
.product-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  margin-bottom: 80px;
}

.product-block:nth-child(even) .product-visual {
  order: 2;
}

.product-block:last-child {
  margin-bottom: 0;
}

.product-visual {
  position: relative;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-lg);
  background:
    radial-gradient(400px 200px at 30% 20%, rgba(6, 182, 212, 0.2), transparent 60%),
    linear-gradient(135deg, rgba(30, 111, 255, 0.12), rgba(234, 241, 250, 0.7));
  border: 1px solid var(--border);
  display: grid;
  place-items: center;
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.product-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(30, 111, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 111, 255, 0.08) 1px, transparent 1px);
  background-size: 32px 32px;
}

.product-visual .pv-icon {
  position: relative;
  width: 120px;
  height: 120px;
  border-radius: 28px;
  background: linear-gradient(135deg, var(--primary), var(--accent-bright));
  display: grid;
  place-items: center;
  box-shadow: 0 20px 40px rgba(30, 111, 255, 0.4);
}

.product-visual .pv-icon svg {
  width: 64px;
  height: 64px;
  stroke: #fff;
  fill: none;
  stroke-width: 1.6;
}

.product-info .eyebrow {
  margin-bottom: 14px;
}

.product-info h3 {
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 800;
  margin-bottom: 14px;
  color: var(--text);
}

.product-info .lead {
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 22px;
}

.feature-list {
  display: grid;
  gap: 12px;
  margin-bottom: 24px;
}

.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: var(--text);
  font-size: 15px;
}

.feature-list .check {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent-soft);
  display: grid;
  place-items: center;
  margin-top: 2px;
}

.feature-list .check svg {
  width: 12px;
  height: 12px;
  stroke: var(--primary);
  fill: none;
  stroke-width: 3;
}

.product-meta {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.meta-item .meta-label {
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 4px;
}

.meta-item .meta-value {
  font-size: 14px;
  color: var(--text);
  font-weight: 600;
}

/* ---------- 客户案例页 ---------- */
.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.case-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease),
    box-shadow 0.3s var(--ease);
  display: flex;
  flex-direction: column;
}

.case-card:hover {
  transform: translateY(-8px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow);
}

.case-banner {
  position: relative;
  height: 160px;
  display: grid;
  place-items: center;
  overflow: hidden;
}

.case-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.18) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.18) 1px, transparent 1px);
  background-size: 24px 24px;
}

.case-emoji {
  position: relative;
  font-size: 52px;
  filter: drop-shadow(0 4px 10px rgba(30, 111, 255, 0.3));
}

.case-industry {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 2;
  font-size: 12px;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(255, 255, 255, 0.6);
  color: var(--primary);
  backdrop-filter: blur(6px);
  font-weight: 600;
}

.case-body {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.case-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text);
}

.case-desc {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 18px;
  flex: 1;
}

.case-result {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  color: var(--primary);
  font-size: 15px;
  font-weight: 700;
}

.case-result svg {
  width: 18px;
  height: 18px;
  stroke: var(--primary);
  fill: none;
  stroke-width: 2;
}

/* ---------- 联系我们页 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: stretch;
}

.contact-info {
  display: grid;
  gap: 18px;
}

.contact-card {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 22px 24px;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease),
    box-shadow 0.3s var(--ease);
}

.contact-card:hover {
  border-color: var(--border-glow);
  transform: translateX(6px);
  box-shadow: var(--shadow-glow);
}

.contact-card .cc-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--accent-bright));
  display: grid;
  place-items: center;
  box-shadow: 0 6px 16px rgba(30, 111, 255, 0.3);
}

.contact-card .cc-icon svg {
  width: 24px;
  height: 24px;
  stroke: #fff;
  fill: none;
  stroke-width: 1.8;
}

.cc-label {
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 2px;
}

.cc-value {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
}

/* 留言表单（仅前端展示） */
.contact-form {
  padding: 36px;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
}

.contact-form h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text);
}

.contact-form .form-note {
  color: var(--text-muted);
  font-size: 14px;
  margin-bottom: 24px;
}

.form-row {
  margin-bottom: 18px;
}

.form-row.two {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.form-row label {
  display: block;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.form-row input,
.form-row textarea,
.form-row select {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease),
    background 0.2s var(--ease);
}

.form-row input::placeholder,
.form-row textarea::placeholder {
  color: var(--text-dim);
}

.form-row input:focus,
.form-row textarea:focus,
.form-row select:focus {
  outline: none;
  border-color: var(--primary);
  background: var(--bg-white);
  box-shadow: 0 0 0 3px rgba(30, 111, 255, 0.15);
}

.form-row textarea {
  resize: vertical;
  min-height: 110px;
}

.form-submit {
  width: 100%;
  margin-top: 6px;
}

.form-toast {
  display: none;
  margin-top: 18px;
  padding: 14px 18px;
  border-radius: 10px;
  background: rgba(6, 182, 212, 0.12);
  border: 1px solid rgba(6, 182, 212, 0.35);
  color: var(--accent);
  font-size: 14px;
  text-align: center;
}

.form-toast.show {
  display: block;
  animation: fadeIn 0.4s var(--ease);
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* 地图占位 */
.map-block {
  margin-top: 40px;
  height: 280px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background:
    radial-gradient(500px 200px at 60% 40%, rgba(6, 182, 212, 0.14), transparent 70%),
    linear-gradient(135deg, rgba(30, 111, 255, 0.10), rgba(234, 241, 250, 0.7));
  display: grid;
  place-items: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.map-block::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(30, 111, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 111, 255, 0.08) 1px, transparent 1px);
  background-size: 40px 40px;
}

.map-pin {
  position: relative;
  text-align: center;
  color: var(--text-muted);
  font-size: 14px;
}

.map-pin .pin-dot {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--primary);
  margin: 0 auto 10px;
  box-shadow: 0 0 0 8px rgba(30, 111, 255, 0.2), 0 0 20px var(--primary);
  animation: pulse 2s infinite;
}

/* ---------- 滚动渐入动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.reveal.in {
  opacity: 1;
  transform: translateY(0);
}

.reveal.d1 { transition-delay: 0.08s; }
.reveal.d2 { transition-delay: 0.16s; }
.reveal.d3 { transition-delay: 0.24s; }
.reveal.d4 { transition-delay: 0.32s; }

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .biz-grid,
  .adv-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .stats {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .case-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .product-block {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .product-block:nth-child(even) .product-visual {
    order: 0;
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .section {
    padding: 64px 0;
  }
  .nav-links,
  .nav-cta {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
  /* 移动端下拉菜单 */
  .nav-collapse {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    padding: 16px 24px 24px;
    display: none;
    flex-direction: column;
    gap: 4px;
    box-shadow: 0 12px 24px rgba(15, 31, 61, 0.1);
  }
  .nav-collapse.open {
    display: flex;
  }
  .nav-collapse a {
    padding: 14px 12px;
    font-size: 16px;
    border-radius: 8px;
    color: var(--text-muted);
  }
  .nav-collapse a:hover,
  .nav-collapse a.active {
    color: var(--primary);
    background: var(--bg-soft);
  }
  .nav-collapse .btn {
    margin-top: 10px;
  }

  .hero-stats {
    gap: 28px;
  }
  .hero-stat .num {
    font-size: 26px;
  }
  .biz-grid,
  .adv-grid,
  .case-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  .form-row.two {
    grid-template-columns: 1fr;
  }
  .contact-form {
    padding: 26px;
  }
  .cta-box {
    padding: 40px 22px;
  }
}

@media (max-width: 420px) {
  .stats {
    grid-template-columns: 1fr;
  }
  .hero-actions .btn {
    width: 100%;
  }
}