/* ============================================================
   贵阳IT上门服务 - 主样式表
   字体：思源黑体 + 系统字体回退
   主色调：深蓝科技感 + 橙色强调
   ============================================================ */

:root {
  --color-primary: #0d47a1;
  --color-primary-dark: #0a2e6e;
  --color-primary-light: #1565c0;
  --color-accent: #f57c00;
  --color-accent-light: #ff9800;
  --color-bg: #ffffff;
  --color-bg-gray: #f5f7fa;
  --color-bg-dark: #0d1b3e;
  --color-text: #1a1a2e;
  --color-text-muted: #5a6473;
  --color-border: #e0e7ef;
  --font-main: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
  --radius: 10px;
  --radius-lg: 16px;
  --shadow: 0 2px 16px rgba(13,71,161,0.08);
  --shadow-md: 0 4px 24px rgba(13,71,161,0.13);
  --transition: 0.22s ease;
  --container: 1180px;
  --header-h: 68px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-main);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  font-size: 16px;
}

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

/* ===== CONTAINER ===== */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== TOPBAR ===== */
.topbar {
  background: var(--color-primary-dark);
  color: #c5d8f7;
  font-size: 13px;
  padding: 7px 0;
}
.topbar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}
.topbar-phone a { color: #f9c74f; font-weight: 500; }

/* ===== HEADER ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 999;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-h);
  display: flex;
  align-items: center;
  transition: box-shadow var(--transition);
}
.header.scrolled { box-shadow: var(--shadow-md); }

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}
.logo-icon {
  font-size: 28px;
  color: var(--color-primary);
}
.logo-main {
  display: block;
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
}
.logo-sub {
  display: block;
  font-size: 11px;
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
}

.nav { display: flex; align-items: center; gap: 4px; }
.nav-link {
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: all var(--transition);
}
.nav-link:hover, .nav-link.active {
  color: var(--color-primary);
  background: #e8f0fd;
}
.nav-cta {
  background: var(--color-accent);
  color: white !important;
  padding: 8px 20px;
  border-radius: 8px;
  margin-left: 8px;
}
.nav-cta:hover { background: var(--color-accent-light); }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 6px 10px;
  font-size: 20px;
  cursor: pointer;
  color: var(--color-primary);
}

/* ===== HERO ===== */
.hero {
  position: relative;
  padding: 90px 0 80px;
  overflow: hidden;
  background: linear-gradient(135deg, #0d1b3e 0%, #0d47a1 60%, #1565c0 100%);
  min-height: 560px;
  display: flex;
  align-items: center;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 80% 20%, rgba(245,124,0,0.15) 0%, transparent 50%),
    radial-gradient(circle at 10% 80%, rgba(255,255,255,0.04) 0%, transparent 40%);
}
.hero-content {
  position: relative;
  z-index: 1;
  color: white;
}
.hero-badge {
  display: inline-block;
  background: rgba(245,124,0,0.18);
  border: 1px solid rgba(245,124,0,0.4);
  color: #ffc266;
  font-size: 13px;
  padding: 5px 16px;
  border-radius: 100px;
  margin-bottom: 24px;
  letter-spacing: 0.03em;
}
.hero h1 {
  font-size: clamp(32px, 5vw, 54px);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 20px;
}
.hero-highlight { color: #f9c74f; }
.hero-desc {
  font-size: 17px;
  color: rgba(255,255,255,0.82);
  line-height: 1.9;
  margin-bottom: 36px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 48px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  transition: all var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
}
.btn-primary { background: var(--color-accent); color: white; }
.btn-primary:hover { background: var(--color-accent-light); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(245,124,0,0.35); }
.btn-outline { border-color: rgba(255,255,255,0.5); color: white; }
.btn-outline:hover { background: rgba(255,255,255,0.1); border-color: white; }
.btn-outline-dark { border-color: var(--color-primary); color: var(--color-primary); }
.btn-outline-dark:hover { background: var(--color-primary); color: white; }
.btn-light { background: white; color: var(--color-primary); }
.btn-light:hover { background: #e8f0fd; }
.btn-outline-white { border-color: rgba(255,255,255,0.7); color: white; }
.btn-outline-white:hover { background: rgba(255,255,255,0.12); }
.btn-lg { padding: 14px 34px; font-size: 16px; }

.hero-stats {
  display: flex;
  align-items: center;
  gap: 0;
  flex-wrap: wrap;
  gap: 0;
}
.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0 24px;
}
.stat-item strong {
  font-size: 28px;
  font-weight: 700;
  color: #f9c74f;
  line-height: 1;
}
.stat-item span {
  font-size: 13px;
  color: rgba(255,255,255,0.7);
  margin-top: 4px;
}
.stat-divider {
  width: 1px;
  height: 40px;
  background: rgba(255,255,255,0.2);
}

/* ===== SECTIONS ===== */
.section { padding: 80px 0; }
.section-gray { background: var(--color-bg-gray); }
.section-dark { background: var(--color-bg-dark); }

.section-header { text-align: center; margin-bottom: 52px; }
.section-header h2 {
  font-size: clamp(24px, 3.5vw, 36px);
  font-weight: 700;
  color: var(--color-text);
  margin: 12px 0 14px;
}
.section-header p { color: var(--color-text-muted); font-size: 16px; }
.section-header.light h2 { color: white; }
.section-header.light p { color: rgba(255,255,255,0.7); }

.section-tag {
  display: inline-block;
  background: #e8f0fd;
  color: var(--color-primary);
  font-size: 13px;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 100px;
  letter-spacing: 0.04em;
}
.tag-light { background: rgba(255,255,255,0.12); color: #ffc266; }

/* ===== SERVICES GRID ===== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}
.service-card {
  background: white;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: all var(--transition);
  display: block;
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transform: scaleX(0);
  transition: transform var(--transition);
  transform-origin: left;
}
.service-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: transparent; }
.service-card:hover::before { transform: scaleX(1); }
.service-icon { font-size: 36px; margin-bottom: 16px; }
.service-card h3 { font-size: 20px; font-weight: 700; color: var(--color-text); margin-bottom: 10px; }
.service-card p { color: var(--color-text-muted); font-size: 14px; margin-bottom: 16px; }
.service-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 20px; }
.service-tags li {
  background: var(--color-bg-gray);
  color: var(--color-primary);
  font-size: 12px;
  padding: 3px 10px;
  border-radius: 100px;
  font-weight: 500;
}
.card-link { color: var(--color-primary); font-size: 13px; font-weight: 600; }
.service-card:hover .card-link { color: var(--color-accent); }

/* ===== OS GRID ===== */
.os-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
}
.os-card {
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  text-align: center;
  transition: all var(--transition);
  color: white;
}
.os-card:hover { background: rgba(255,255,255,0.12); transform: translateY(-3px); }
.os-logo { font-size: 36px; margin-bottom: 12px; }
.os-card h4 { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.os-card p { font-size: 13px; color: rgba(255,255,255,0.65); }

/* ===== AREAS GRID ===== */
.areas-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}
.area-card {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  background: white;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px 18px;
  transition: all var(--transition);
}
.area-card:hover { border-color: var(--color-primary); box-shadow: var(--shadow); transform: translateY(-2px); }
.area-icon { font-size: 22px; flex-shrink: 0; }
.area-card h4 { font-size: 16px; font-weight: 600; color: var(--color-text); margin-bottom: 4px; }
.area-card p { font-size: 13px; color: var(--color-text-muted); }

/* ===== WHY GRID ===== */
.why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}
.why-card {
  background: white;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: all var(--transition);
}
.why-card:hover { box-shadow: var(--shadow-md); border-color: var(--color-primary); }
.why-num {
  font-size: 38px;
  font-weight: 700;
  color: #d0dff7;
  line-height: 1;
  margin-bottom: 12px;
  font-variant-numeric: tabular-nums;
}
.why-card h4 { font-size: 17px; font-weight: 700; color: var(--color-text); margin-bottom: 8px; }
.why-card p { font-size: 14px; color: var(--color-text-muted); }

/* ===== CTA SECTION ===== */
.cta-section {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  padding: 64px 0;
}
.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}
.cta-inner h2 { font-size: 28px; font-weight: 700; color: white; margin-bottom: 8px; }
.cta-inner p { color: rgba(255,255,255,0.75); font-size: 15px; }
.cta-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* ===== FOOTER ===== */
.footer { background: #0d1b3e; color: rgba(255,255,255,0.75); padding: 64px 0 0; }
.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 48px;
}
.footer-logo { font-size: 20px; font-weight: 700; color: white; margin-bottom: 14px; }
.footer p { font-size: 14px; line-height: 1.8; }
.footer-col h5 { font-size: 15px; font-weight: 600; color: white; margin-bottom: 16px; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul a { font-size: 14px; color: rgba(255,255,255,0.65); transition: color var(--transition); }
.footer-col ul a:hover { color: #f9c74f; }
.footer-col p { margin-bottom: 8px; }
.footer-col a { color: rgba(255,255,255,0.65); }
.footer-col a:hover { color: #f9c74f; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 18px 0;
}
.footer-bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}
.footer-bottom p { font-size: 13px; color: rgba(255,255,255,0.45); }
.icp-info { font-size: 12px; }
.icp-info a { color: rgba(255,255,255,0.45); transition: color var(--transition); }
.icp-info a:hover { color: rgba(255,255,255,0.75); }

/* ===== PAGE HERO (子页) ===== */
.page-hero {
  background: linear-gradient(135deg, #0d1b3e 0%, #0d47a1 100%);
  padding: 60px 0 56px;
  color: white;
  text-align: center;
}
.page-hero h1 { font-size: clamp(26px, 4vw, 44px); font-weight: 700; margin-bottom: 14px; }
.page-hero p { font-size: 17px; color: rgba(255,255,255,0.78); max-width: 620px; margin: 0 auto; }
.breadcrumb { font-size: 13px; color: rgba(255,255,255,0.5); margin-bottom: 16px; }
.breadcrumb a { color: rgba(255,255,255,0.5); }
.breadcrumb a:hover { color: white; }

/* ===== SERVICE DETAIL PAGE ===== */
.service-detail {
  padding: 70px 0;
}
.service-detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
  margin-bottom: 60px;
}
.service-detail-grid.reverse { direction: rtl; }
.service-detail-grid.reverse > * { direction: ltr; }
.detail-visual {
  background: linear-gradient(135deg, var(--color-bg-gray) 0%, #e8f0fd 100%);
  border-radius: var(--radius-lg);
  height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 80px;
}
.detail-text h2 { font-size: 28px; font-weight: 700; color: var(--color-text); margin-bottom: 14px; }
.detail-text p { color: var(--color-text-muted); margin-bottom: 20px; font-size: 15px; }
.detail-list { list-style: none; }
.detail-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 8px 0;
  font-size: 15px;
  border-bottom: 1px solid var(--color-border);
}
.detail-list li::before {
  content: '✓';
  color: var(--color-accent);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 2px;
}

/* ===== AREAS PAGE ===== */
.area-detail-section { padding: 60px 0; }
.area-detail-section:nth-child(even) { background: var(--color-bg-gray); }
.area-detail { max-width: 900px; margin: 0 auto; }
.area-detail h2 {
  font-size: 26px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.area-detail p { color: var(--color-text-muted); margin-bottom: 20px; }
.area-service-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.area-service-tags span {
  background: #e8f0fd;
  color: var(--color-primary);
  font-size: 13px;
  padding: 5px 14px;
  border-radius: 100px;
  font-weight: 500;
}

/* ===== CONTACT PAGE ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  margin-top: 60px;
}
.contact-info h3 { font-size: 22px; font-weight: 700; margin-bottom: 24px; }
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 24px;
}
.contact-item-icon {
  width: 44px;
  height: 44px;
  background: #e8f0fd;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}
.contact-item h4 { font-size: 15px; font-weight: 600; margin-bottom: 4px; }
.contact-item p, .contact-item a { font-size: 15px; color: var(--color-text-muted); }
.contact-item a:hover { color: var(--color-primary); }

.contact-form {
  background: var(--color-bg-gray);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
}
.contact-form h3 { font-size: 22px; font-weight: 700; margin-bottom: 24px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 14px; font-weight: 500; color: var(--color-text); margin-bottom: 6px; }
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 15px;
  font-family: var(--font-main);
  color: var(--color-text);
  background: white;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(13,71,161,0.1);
}
.form-group textarea { resize: vertical; min-height: 100px; }
.form-submit {
  width: 100%;
  background: var(--color-primary);
  color: white;
  border: none;
  padding: 14px;
  border-radius: var(--radius);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font-main);
  transition: all var(--transition);
}
.form-submit:hover { background: var(--color-primary-light); transform: translateY(-1px); }

/* ===== ABOUT PAGE ===== */
.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  padding: 70px 0;
}
.about-img {
  background: linear-gradient(135deg, #e8f0fd 0%, #c5d8f7 100%);
  border-radius: var(--radius-lg);
  height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 80px;
}
.about-text h2 { font-size: 30px; font-weight: 700; margin-bottom: 16px; }
.about-text p { color: var(--color-text-muted); margin-bottom: 14px; font-size: 15px; }
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
  padding: 60px 0;
}
.team-card {
  background: white;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 30px 24px;
  text-align: center;
}
.team-avatar {
  width: 70px;
  height: 70px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  margin: 0 auto 16px;
}
.team-card h4 { font-size: 17px; font-weight: 600; margin-bottom: 6px; }
.team-card p { font-size: 13px; color: var(--color-text-muted); }

/* ===== 成功提示 ===== */
.success-msg {
  background: #e8f5e9;
  color: #2e7d32;
  border: 1px solid #a5d6a7;
  border-radius: var(--radius);
  padding: 14px 18px;
  font-size: 15px;
  margin-top: 12px;
  display: none;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .service-detail-grid { grid-template-columns: 1fr; gap: 32px; }
  .service-detail-grid.reverse { direction: ltr; }
  .contact-grid { grid-template-columns: 1fr; }
  .about-intro { grid-template-columns: 1fr; }
  .about-img { height: 220px; }
  .cta-inner { flex-direction: column; text-align: center; }
}

@media (max-width: 700px) {
  .nav { display: none; flex-direction: column; position: absolute; top: var(--header-h); left: 0; right: 0; background: white; border-bottom: 1px solid var(--color-border); padding: 12px 16px 16px; box-shadow: var(--shadow-md); gap: 2px; }
  .nav.open { display: flex; }
  .nav-link { border-radius: 8px; padding: 10px 14px; }
  .nav-toggle { display: block; }
  .header { position: sticky; }
  .footer-inner { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom-inner { flex-direction: column; text-align: center; }
  .topbar-inner { flex-direction: column; gap: 2px; text-align: center; }
  .hero { padding: 60px 0 56px; min-height: auto; }
  .stat-item { padding: 0 12px; }
  .stat-item strong { font-size: 22px; }
  .hero-stats { gap: 0; }
  .contact-form { padding: 24px 18px; }
}

@media (max-width: 480px) {
  .services-grid { grid-template-columns: 1fr; }
  .areas-grid { grid-template-columns: 1fr 1fr; }
  .hero-actions { flex-direction: column; }
  .cta-actions { flex-direction: column; align-items: stretch; text-align: center; }
}