/* ==========================================================================
   江苏锡信工程检测有限公司 - 主样式表
   ========================================================================== */

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

:root {
  /* Brand colors based on logo */
  --color-primary: #1E5BA8;
  --color-primary-dark: #15407A;
  --color-primary-light: #2C7BC4;
  --color-orange: #E89339;
  --color-orange-light: #F5B05C;
  --color-green: #4A8B3F;
  --color-green-light: #6BB85F;

  /* Neutrals */
  --color-bg: #ffffff;
  --color-bg-alt: #F5F7FA;
  --color-bg-dark: #0F2942;
  --color-text: #2C3E50;
  --color-text-light: #6B7C8C;
  --color-border: #E1E7ED;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(15, 41, 66, 0.06);
  --shadow-md: 0 8px 24px rgba(15, 41, 66, 0.10);
  --shadow-lg: 0 16px 48px rgba(15, 41, 66, 0.14);

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
               "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  --font-num: "SF Pro Display", -apple-system, BlinkMacSystemFont, sans-serif;

  /* Layout */
  --container-max: 1200px;
  --header-height: 72px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;

  /* Motion */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --transition: 0.3s var(--ease-out);
}

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

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-primary-light); }

h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-text);
}

h1 { font-size: clamp(2rem, 4.5vw, 3.2rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); letter-spacing: -0.01em; }
h3 { font-size: 1.25rem; }
p  { margin-bottom: 1em; }

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

/* ---------- Header & Navigation ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid transparent;
  z-index: 100;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.site-header.scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--color-text);
  font-weight: 700;
}

.brand-logo {
  width: 44px;
  height: auto;
  flex-shrink: 0;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-text .name {
  font-size: 17px;
  color: var(--color-primary);
  letter-spacing: 0.02em;
}

.brand-text .sub {
  font-size: 11px;
  color: var(--color-text-light);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav a {
  position: relative;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  padding: 6px 0;
  transition: color var(--transition);
}

.nav a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition);
}

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

.nav a.active::after,
.nav a:hover::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  background: none;
  border: 0;
  width: 40px;
  height: 40px;
  cursor: pointer;
  color: var(--color-text);
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  margin: 5px auto;
  background: currentColor;
  transition: transform var(--transition), opacity var(--transition);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 0;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: #fff;
  box-shadow: 0 4px 14px rgba(30, 91, 168, 0.32);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(30, 91, 168, 0.4);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary);
  color: #fff;
}

.btn-orange {
  background: linear-gradient(135deg, var(--color-orange), var(--color-orange-light));
  color: #fff;
  box-shadow: 0 4px 14px rgba(232, 147, 57, 0.32);
}

.btn-orange:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(232, 147, 57, 0.4);
  color: #fff;
}

/* ---------- Sections ---------- */
section {
  padding: 80px 0;
}

.section-alt {
  background: var(--color-bg-alt);
}

.section-dark {
  background: var(--color-bg-dark);
  color: #fff;
}

.section-dark h2,
.section-dark h3 { color: #fff; }

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-header .eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--color-orange);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-header h2 {
  margin-bottom: 16px;
}

.section-header p {
  color: var(--color-text-light);
  max-width: 640px;
  margin: 0 auto;
  font-size: 17px;
}

/* ---------- Hero (Home) ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-height);
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(15, 41, 66, 0.92), rgba(30, 91, 168, 0.85)),
    radial-gradient(circle at 80% 20%, rgba(232, 147, 57, 0.18), transparent 40%),
    radial-gradient(circle at 20% 80%, rgba(74, 139, 63, 0.15), transparent 40%);
  color: #fff;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.hero-content h1 {
  color: #fff;
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  line-height: 1.15;
  margin-bottom: 24px;
}

.hero-content .lead {
  font-size: 18px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 36px;
  max-width: 540px;
}

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

.hero-actions .btn-outline {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.6);
}

.hero-actions .btn-outline:hover {
  background: #fff;
  color: var(--color-primary);
  border-color: #fff;
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-logo {
  width: 320px;
  max-width: 100%;
  background: #fff;
  padding: 32px;
  border-radius: 24px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.25);
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

/* Hero stats strip */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 64px;
  padding-top: 48px;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
}

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

.stat-num {
  font-family: var(--font-num);
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 700;
  color: var(--color-orange-light);
  line-height: 1;
}

.stat-num .plus {
  color: #fff;
  margin-left: 2px;
}

.stat-label {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
  margin-top: 8px;
  letter-spacing: 0.05em;
}

/* ---------- Page Header (inner pages) ---------- */
.page-header {
  padding-top: calc(var(--header-height) + 80px);
  padding-bottom: 80px;
  background:
    linear-gradient(135deg, rgba(15, 41, 66, 0.92), rgba(30, 91, 168, 0.85));
  color: #fff;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-header::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 100%, rgba(232, 147, 57, 0.15), transparent 60%);
  pointer-events: none;
}

.page-header h1 {
  color: #fff;
  margin-bottom: 12px;
  position: relative;
}

.page-header p {
  color: rgba(255, 255, 255, 0.8);
  font-size: 17px;
  max-width: 640px;
  margin: 0 auto;
  position: relative;
}

.breadcrumb {
  display: flex;
  justify-content: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 16px;
  position: relative;
}

.breadcrumb a { color: rgba(255, 255, 255, 0.7); }
.breadcrumb a:hover { color: #fff; }

/* ---------- Cards & Grids ---------- */
.grid {
  display: grid;
  gap: 32px;
}

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

.card {
  background: #fff;
  padding: 32px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.card-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 20px;
}

.card-orange .card-icon { background: linear-gradient(135deg, var(--color-orange), var(--color-orange-light)); }
.card-green .card-icon  { background: linear-gradient(135deg, var(--color-green), var(--color-green-light)); }

.card h3 {
  margin-bottom: 12px;
  font-size: 18px;
}

.card p {
  color: var(--color-text-light);
  font-size: 15px;
  margin: 0;
}

/* ---------- Stats (alt section) ---------- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  margin-top: 48px;
}

.stat-card {
  text-align: center;
  padding: 32px 16px;
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  transition: transform var(--transition);
}

.stat-card:hover {
  transform: translateY(-4px);
}

.stat-card .num {
  font-family: var(--font-num);
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 8px;
}

.stat-card .num.orange { color: var(--color-orange); }
.stat-card .num.green  { color: var(--color-green); }

.stat-card .label {
  font-size: 14px;
  color: var(--color-text-light);
}

/* ---------- Timeline (About) ---------- */
.timeline {
  position: relative;
  max-width: 720px;
  margin: 0 auto;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
  transform: translateX(-50%);
}

.timeline-item {
  position: relative;
  width: 50%;
  padding: 24px 40px;
}

.timeline-item:nth-child(odd) {
  align-self: flex-start;
  text-align: right;
}

.timeline-item:nth-child(even) {
  align-self: flex-end;
  margin-left: auto;
  text-align: left;
}

.timeline-item::before {
  content: "";
  position: absolute;
  top: 32px;
  width: 14px;
  height: 14px;
  background: var(--color-primary);
  border: 3px solid #fff;
  border-radius: 50%;
  box-shadow: 0 0 0 3px var(--color-primary);
}

.timeline-item:nth-child(odd)::before { right: -7px; }
.timeline-item:nth-child(even)::before { left: -7px; }

.timeline-item .year {
  font-family: var(--font-num);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.timeline-item .desc {
  color: var(--color-text-light);
  font-size: 15px;
}

/* ---------- Organization Chart ---------- */
.org-chart {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 40px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.org-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  padding: 20px 24px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: 16px;
  transition: transform var(--transition);
}

.org-card:hover { transform: translateX(4px); }

.org-card .icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-bg-alt);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.org-card h4 {
  font-size: 16px;
  margin-bottom: 2px;
}

.org-card p {
  margin: 0;
  font-size: 13px;
  color: var(--color-text-light);
}

/* ---------- Service List (Services page) ---------- */
.service-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.service-item {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 28px;
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  transition: all var(--transition);
}

.service-item:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.service-item:nth-child(3n+2) { border-left-color: var(--color-orange); }
.service-item:nth-child(3n+3) { border-left-color: var(--color-green); }

.service-item h3 {
  font-size: 18px;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.service-item h3::before {
  content: "▸";
  color: var(--color-primary);
  font-size: 16px;
}

.service-item:nth-child(3n+2) h3::before { color: var(--color-orange); }
.service-item:nth-child(3n+3) h3::before { color: var(--color-green); }

.service-item p {
  color: var(--color-text-light);
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
}

/* ---------- Qualification / Credentials ---------- */
.cred-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.cred-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 32px;
  border: 1px solid var(--color-border);
  display: flex;
  gap: 20px;
  align-items: flex-start;
  transition: all var(--transition);
}

.cred-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
}

.cred-card .badge {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  flex-shrink: 0;
}

.cred-card h3 {
  margin-bottom: 8px;
  font-size: 17px;
}

.cred-card .cert-no {
  font-family: var(--font-num);
  font-size: 13px;
  color: var(--color-orange);
  background: rgba(232, 147, 57, 0.08);
  padding: 2px 10px;
  border-radius: 12px;
  display: inline-block;
  margin-bottom: 8px;
  letter-spacing: 0.02em;
}

.cred-card p {
  margin: 0;
  font-size: 14px;
  color: var(--color-text-light);
}

/* ---------- Team ---------- */
.team-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.team-card {
  background: #fff;
  padding: 24px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  text-align: center;
  transition: transform var(--transition);
}

.team-card:hover { transform: translateY(-4px); }

.team-card .avatar {
  width: 72px;
  height: 72px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  font-weight: 700;
}

.team-card h4 {
  font-size: 16px;
  margin-bottom: 4px;
}

.team-card p {
  font-size: 13px;
  color: var(--color-text-light);
  margin: 0;
}

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 56px;
  align-items: flex-start;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-card {
  display: flex;
  gap: 20px;
  padding: 24px;
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  align-items: flex-start;
}

.contact-card .icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 18px;
}

.contact-card h4 {
  font-size: 15px;
  margin-bottom: 6px;
  color: var(--color-text-light);
  font-weight: 500;
}

.contact-card p {
  margin: 0;
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text);
}

.contact-form {
  background: #fff;
  padding: 40px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.contact-form .form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--color-text);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  font-size: 15px;
  font-family: inherit;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg-alt);
  transition: border-color var(--transition), background var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-primary);
  background: #fff;
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-success {
  display: none;
  padding: 16px;
  background: rgba(74, 139, 63, 0.1);
  border: 1px solid var(--color-green);
  color: var(--color-green);
  border-radius: var(--radius-md);
  margin-top: 16px;
  font-weight: 500;
}

.form-success.show { display: block; }

/* ---------- Map placeholder ---------- */
.map-placeholder {
  margin-top: 32px;
  height: 280px;
  border-radius: var(--radius-lg);
  background:
    linear-gradient(135deg, rgba(30, 91, 168, 0.05), rgba(74, 139, 63, 0.05)),
    repeating-linear-gradient(45deg, transparent, transparent 24px, rgba(30, 91, 168, 0.04) 24px, rgba(30, 91, 168, 0.04) 48px);
  border: 1px dashed var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.map-pin {
  width: 48px;
  height: 48px;
  background: var(--color-primary);
  border-radius: 50% 50% 50% 0;
  transform: rotate(-45deg);
  position: relative;
  animation: bounce 2s ease-in-out infinite;
}

.map-pin::after {
  content: "";
  width: 18px;
  height: 18px;
  background: #fff;
  border-radius: 50%;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

@keyframes bounce {
  0%, 100% { transform: rotate(-45deg) translateY(0); }
  50% { transform: rotate(-45deg) translateY(-12px); }
}

.map-label {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: #fff;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  font-weight: 600;
  font-size: 14px;
}

/* ---------- Tencent Map Container ---------- */
#mapContainer {
  margin-top: 32px;
  width: 100%;
  height: 400px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
}

#mapAddress {
  margin-top: 12px;
  text-align: center;
  color: var(--color-text-light);
  font-size: 14px;
  font-weight: 600;
}

/* ---------- Footer ---------- */
.site-footer {
  background: #0a1d2e;
  color: rgba(255, 255, 255, 0.7);
  padding: 64px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand .brand-logo { width: 56px; height: auto; }
.footer-brand .brand-text .name { color: #fff; }
.footer-brand .brand-text .sub { color: rgba(255, 255, 255, 0.5); }
.footer-brand p {
  margin-top: 16px;
  font-size: 14px;
  line-height: 1.7;
  max-width: 320px;
}

.footer-col h5 {
  font-size: 14px;
  color: #fff;
  margin-bottom: 20px;
  font-weight: 600;
  letter-spacing: 0.05em;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
  transition: color var(--transition);
}

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

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- Footer WeChat Section ---------- */
.footer-wechat {
  display: flex;
  gap: 16px;
  align-items: center;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-wechat-qr {
  width: 84px;
  height: auto;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  background: #fff;
  padding: 4px;
}

.footer-wechat-text {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.6;
}

.footer-wechat-text strong {
  display: block;
  color: #fff;
  font-size: 14px;
  margin-bottom: 4px;
}

.footer-wechat-text .wechat-name {
  color: #07C160;
  font-weight: 600;
}

/* ---------- Floating WeChat Button ---------- */
.float-wechat {
  position: fixed;
  right: 24px;
  bottom: 32px;
  z-index: 200;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 12px;
}

.float-wechat-btn {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, #07C160, #06AD56);
  color: #fff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(7, 193, 96, 0.4);
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
}

.float-wechat-btn:hover {
  transform: scale(1.08);
  box-shadow: 0 6px 28px rgba(7, 193, 96, 0.5);
}

.float-wechat-btn svg {
  width: 30px;
  height: 30px;
}

.float-wechat-btn::before {
  content: "";
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 2px solid #07C160;
  opacity: 0;
  animation: pulse-ring 2.5s ease-out infinite;
}

@keyframes pulse-ring {
  0% { transform: scale(1); opacity: 0.6; }
  100% { transform: scale(1.5); opacity: 0; }
}

.float-wechat-label {
  background: #fff;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  color: #07C160;
  box-shadow: var(--shadow-md);
  white-space: nowrap;
  opacity: 0;
  transform: translateX(10px);
  transition: opacity var(--transition), transform var(--transition);
  pointer-events: none;
}

.float-wechat:hover .float-wechat-label {
  opacity: 1;
  transform: translateX(0);
}

/* ---------- WeChat QR Popup ---------- */
.wechat-popup {
  position: fixed;
  right: 24px;
  bottom: 104px;
  z-index: 201;
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: 0 16px 56px rgba(15, 41, 66, 0.25);
  padding: 24px;
  width: 240px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px) scale(0.95);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
}

.wechat-popup.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.wechat-popup-close {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 28px;
  height: 28px;
  border: none;
  background: var(--color-bg-alt);
  border-radius: 50%;
  cursor: pointer;
  font-size: 16px;
  color: var(--color-text-light);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), color var(--transition);
}

.wechat-popup-close:hover {
  background: #e8eaed;
  color: var(--color-text);
}

.wechat-popup img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
}

.wechat-popup h4 {
  text-align: center;
  margin: 16px 0 4px;
  font-size: 16px;
  color: var(--color-text);
}

.wechat-popup p {
  text-align: center;
  margin: 0;
  font-size: 13px;
  color: var(--color-text-light);
}

.wechat-popup-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 200;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition);
}

.wechat-popup-overlay.show {
  opacity: 1;
  visibility: visible;
}

/* ---------- Contact Page WeChat Card ---------- */
.contact-wechat-card {
  display: flex;
  gap: 24px;
  padding: 28px;
  background: linear-gradient(135deg, rgba(7, 193, 96, 0.05), rgba(7, 193, 96, 0.02));
  border-radius: var(--radius-lg);
  border: 1px solid rgba(7, 193, 96, 0.2);
  align-items: center;
  margin-top: 24px;
}

.contact-wechat-card .qr-wrap {
  flex-shrink: 0;
  width: 140px;
  height: auto;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.contact-wechat-card .qr-wrap img {
  width: 100%;
  height: auto;
  display: block;
}

.contact-wechat-card .info h4 {
  font-size: 18px;
  margin-bottom: 8px;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: 8px;
}

.contact-wechat-card .info h4 .ic {
  width: 28px;
  height: 28px;
  color: #07C160;
  flex-shrink: 0;
}

.contact-wechat-card .info .account-name {
  font-size: 15px;
  color: #07C160;
  font-weight: 600;
  margin-bottom: 8px;
}

.contact-wechat-card .info p {
  font-size: 14px;
  color: var(--color-text-light);
  margin: 0;
  line-height: 1.7;
}

/* ---------- Animations on scroll ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}

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

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  section { padding: 64px 0; }

  .hero { min-height: auto; padding: 120px 0 64px; }
  .hero-inner { grid-template-columns: 1fr; gap: 48px; }
  .hero-visual { order: -1; }
  .hero-logo { width: 200px; }

  .hero-stats { grid-template-columns: repeat(2, 1fr); margin-top: 48px; padding-top: 32px; }

  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .cred-grid, .service-list { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 32px; }
  .contact-form { padding: 28px; }
  .form-row { grid-template-columns: 1fr; }

  .nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 16px 24px 24px;
    border-bottom: 1px solid var(--color-border);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition), opacity var(--transition);
  }

  .nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav a {
    width: 100%;
    padding: 12px 0;
    border-bottom: 1px solid var(--color-border);
  }

  .nav a:last-child { border-bottom: 0; }

  .nav-toggle { display: block; }
  .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); }

  .timeline::before { left: 24px; }
  .timeline-item { width: 100%; padding-left: 56px; padding-right: 16px; text-align: left !important; }
  .timeline-item:nth-child(odd) { align-self: stretch; }
  .timeline-item:nth-child(even) { margin-left: 0; }
  .timeline-item::before { left: 17px !important; right: auto !important; }

  .org-chart { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .container { padding: 0 16px; }
  .header-inner { padding: 0 16px; }
  .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: 1fr 1fr; }
  .hero-actions .btn { width: 100%; }
  .footer-bottom { flex-direction: column; text-align: center; }

  /* WeChat: footer QR smaller on mobile */
  .footer-wechat { gap: 12px; }
  .footer-wechat-qr { width: 68px; }

  /* Map: shorter on mobile */
  #mapContainer { height: 280px; }

  /* WeChat: contact card stacked on mobile */
  .contact-wechat-card { flex-direction: column; text-align: center; }
  .contact-wechat-card .qr-wrap { width: 120px; }
  .contact-wechat-card .info h4 { justify-content: center; }

  /* WeChat: popup centered on mobile */
  .wechat-popup {
    right: 50%;
    transform: translate(50%, 12px) scale(0.95);
    bottom: auto;
    top: 50%;
    margin-top: -150px;
  }
  .wechat-popup.show {
    transform: translate(50%, 0) scale(1);
  }

  /* WeChat: float button smaller on mobile */
  .float-wechat-btn { width: 50px; height: 50px; }
  .float-wechat-btn svg { width: 26px; height: 26px; }
  .float-wechat { right: 16px; bottom: 24px; }
}