/* ==========================================
   正伟信息官网 — 全站样式
   设计风格：现代明亮专业风
   主色调：蓝白商务风
   ========================================== */

/* ===== 基础重置 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: #f8fafc;
  color: #1e293b;
  line-height: 1.6;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; transition: color .2s; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

/* ===== CSS 变量 ===== */
:root {
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --accent: #0891b2;
  --accent2: #7c3aed;
  --bg-light: #ffffff;
  --bg-card: #ffffff;
  --bg-card2: #f1f5f9;
  --border: #e2e8f0;
  --text: #1e293b;
  --text-muted: #64748b;
  --text-light: #475569;
  --radius: 12px;
  --radius-sm: 6px;
  --shadow: 0 2px 12px rgba(0,0,0,.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,.12);
  --gradient: linear-gradient(135deg, #2563eb, #0891b2);
}

/* ===== 容器 ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== 公用按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 24px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all .25s;
  border: none;
}
.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 2px 12px rgba(37,99,235,.25);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 4px 20px rgba(37,99,235,.35); }
.btn-outline {
  border: 1.5px solid #e2e8f0;
  color: #64748b;
  background: #fff;
}
.btn-outline:hover { border-color: #2563eb; color: #2563eb; background: #eff6ff; }
.btn-white { background: #fff; color: #1e293b; font-weight: 600; }
.btn-white:hover { background: #f8fafc; transform: translateY(-1px); }

/* ===== 公用区块头 ===== */
.section { padding: 60px 0; }
.section-header { text-align: center; margin-bottom: 40px; }
.section-tag {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 4px;
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  color: #2563eb;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .5px;
  margin-bottom: 12px;
}
.section-title {
  font-size: clamp(26px, 4vw, 32px);
  font-weight: 700;
  color: #1e293b;
  margin-bottom: 12px;
}
.section-desc {
  font-size: 15px;
  color: #64748b;
  line-height: 1.7;
  max-width: 600px;
  margin: 0 auto;
}

/* ===== 导航 ===== */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 10px 0;
  background: #fff;
  border-bottom: 1px solid #e2e8f0;
  transition: all .3s;
}
.header.scrolled {
  box-shadow: 0 2px 16px rgba(0,0,0,.06);
}
.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.logo {
  display: flex;
  align-items: center;
  font-size: 20px;
  font-weight: 700;
  color: #1e293b;
}
.logo img {
  height: 36px;
  width: auto;
  display: block;
}
.logo-icon { font-size: 24px; }
.logo-text { background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-link {
  padding: 8px 14px;
  border-radius: 6px;
  color: #64748b;
  font-size: 14px;
  font-weight: 500;
  transition: all .2s;
}
.nav-link:hover, .nav-link.active { color: #2563eb; background: #eff6ff; }
.nav-btn {
  padding: 8px 18px;
  border-radius: 6px;
  background: var(--gradient);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  margin-left: 8px;
  transition: all .2s;
}
.nav-btn:hover { opacity: .9; transform: translateY(-1px); }
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span { display: block; width: 24px; height: 2px; background: #1e293b; border-radius: 2px; transition: all .3s; }

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 75vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 80px 0 50px;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 60% at 80% 40%, rgba(37,99,235,.04) 0%, transparent 70%),
    radial-gradient(ellipse 50% 50% at 20% 70%, rgba(8,145,178,.03) 0%, transparent 60%);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 600px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 14px;
  border-radius: 4px;
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  color: #2563eb;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
}
.hero-badge::before { content: '●'; color: #2563eb; font-size: 10px; }
.hero-title {
  font-size: clamp(30px, 5vw, 44px);
  font-weight: 800;
  color: #1e293b;
  line-height: 1.2;
  margin-bottom: 16px;
  letter-spacing: -1px;
}
.hero-desc {
  font-size: 16px;
  color: #64748b;
  line-height: 1.7;
  margin-bottom: 24px;
  max-width: 520px;
}
.hero-btns { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 28px; }
.hero-stats {
  display: flex;
  align-items: center;
  gap: 20px;
}
.stat-num {
  font-size: 24px;
  font-weight: 800;
  color: #1e293b;
  line-height: 1;
}
.stat-num span { font-size: 14px; color: #2563eb; }
.stat-label { font-size: 12px; color: #64748b; margin-top: 4px; }
.stat-divider { width: 1px; height: 28px; background: #e2e8f0; }

/* Hero 右侧图形 */
.hero-graphic {
  position: absolute;
  right: -60px;
  top: 50%;
  transform: translateY(-50%);
  width: 380px;
  height: 380px;
  pointer-events: none;
}
.circle-1, .circle-2, .circle-3 {
  position: absolute;
  border-radius: 50%;
  border: 1px solid;
}
.circle-1 {
  width: 300px; height: 300px;
  border-color: rgba(37,99,235,.06);
  top: 40px; left: 40px;
  animation: spin 30s linear infinite;
}
.circle-2 {
  width: 220px; height: 220px;
  border-color: rgba(8,145,178,.05);
  top: 80px; left: 80px;
  animation: spin 25s linear infinite reverse;
}
.circle-3 {
  width: 160px; height: 160px;
  border-color: rgba(124,58,237,.04);
  top: 110px; left: 110px;
  animation: spin 20s linear infinite;
}
@keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }

/* 浮动卡片 */
.floating-card {
  position: absolute;
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 10px;
  padding: 10px 14px;
  box-shadow: 0 4px 16px rgba(0,0,0,.08);
  white-space: nowrap;
}
.fc-icon { font-size: 18px; }
.fc-text { font-size: 12px; color: #64748b; font-weight: 500; }
.card-1 { top: 80px; left: 60px; animation: float1 4s ease-in-out infinite; }
.card-2 { top: 220px; right: 20px; animation: float2 5s ease-in-out infinite; }
.card-3 { bottom: 100px; left: 80px; animation: float3 4.5s ease-in-out infinite; }
@keyframes float1 { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-10px)} }
@keyframes float2 { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-6px)} }
@keyframes float3 { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-12px)} }

/* ===== 产品区域 ===== */
.products-section { background: #fff; }
.products-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}
.product-card {
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 10px;
  padding: 24px;
  position: relative;
  transition: all .3s;
  overflow: hidden;
}
.product-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--gradient);
  transform: scaleX(0);
  transition: transform .3s;
  transform-origin: left;
}
.product-card:hover { transform: translateY(-3px); border-color: #bfdbfe; box-shadow: 0 8px 32px rgba(37,99,235,.12); }
.product-card:hover::before { transform: scaleX(1); }
.product-card.featured {
  background: linear-gradient(135deg, #fff 0%, #eff6ff 100%);
  border-color: #bfdbfe;
  grid-column: span 1;
}
.product-icon-wrap {
  width: 52px; height: 52px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}
.product-icon-wrap.blue { background: #eff6ff; color: #2563eb; }
.product-icon-wrap.green { background: #f0fdf4; color: #10b981; }
.product-icon-wrap.orange { background: #fffbeb; color: #f59e0b; }
.product-icon-wrap.purple { background: #faf5ff; color: #7c3aed; }
.product-badge {
  position: absolute;
  top: 14px; right: 14px;
  padding: 4px 10px;
  border-radius: 4px;
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  color: #2563eb;
  font-size: 11px;
  font-weight: 600;
}
.product-card h3 {
  font-size: 17px;
  font-weight: 700;
  color: #1e293b;
  margin-bottom: 8px;
}
.product-card p {
  color: #64748b;
  font-size: 13px;
  line-height: 1.6;
  margin-bottom: 14px;
}
.product-features {
  display: flex;
  flex-direction: column;
  gap: 5px;
  margin-bottom: 16px;
}
.product-features li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: #475569;
}
.check { color: #10b981; font-weight: 700; }
.product-link {
  color: #2563eb;
  font-size: 13px;
  font-weight: 600;
  transition: gap .2s;
}
.product-link:hover { gap: 4px; }

/* ===== 优势区域 ===== */
.adv-section { background: #f8fafc; }
.adv-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}
.adv-desc {
  color: #64748b;
  line-height: 1.7;
  margin-bottom: 24px;
  max-width: 480px;
}
.adv-list { display: flex; flex-direction: column; gap: 14px; }
.adv-item { display: flex; gap: 14px; }
.adv-num {
  flex-shrink: 0;
  width: 32px; height: 32px;
  border-radius: 6px;
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  color: #2563eb;
  margin-top: 2px;
}
.adv-content h4 { font-size: 15px; font-weight: 600; color: #1e293b; margin-bottom: 4px; }
.adv-content p { font-size: 13px; color: #64748b; line-height: 1.6; }

/* 右侧可视化卡片 */
.adv-visual { position: relative; padding: 14px; }
.adv-card-main {
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0,0,0,.06);
}
.acm-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  background: #f8fafc;
  border-bottom: 1px solid #e2e8f0;
  font-size: 12px;
  color: #64748b;
}
.acm-dot { width: 10px; height: 10px; border-radius: 50%; }
.acm-dot.green { background: #10b981; }
.acm-dot.yellow { background: #f59e0b; }
.acm-dot.red { background: #ef4444; }
.acm-header span { margin-left: 4px; }
.acm-body { padding: 14px; }
.acm-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 0;
  border-bottom: 1px solid #e2e8f0;
  font-size: 13px;
}
.acm-label { color: #64748b; }
.acm-value { font-weight: 700; }
.acm-value.blue { color: #2563eb; }
.acm-value.green { color: #10b981; }
.acm-value.orange { color: #f59e0b; }
.acm-progress {
  margin-top: 12px;
  height: 6px;
  background: #f1f5f9;
  border-radius: 3px;
  overflow: hidden;
}
.acm-progress-bar {
  height: 100%;
  background: var(--gradient);
  border-radius: 3px;
  transition: width 1s ease;
}
.acm-progress-label {
  font-size: 11px;
  color: #64748b;
  margin-top: 6px;
}
.acm-chart {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  margin-top: 16px;
  height: 70px;
}
.acm-bar {
  flex: 1;
  background: rgba(37,99,235,.12);
  border-radius: 4px 4px 0 0;
  position: relative;
  transition: background .3s;
}
.acm-bar.active { background: var(--gradient); }
.acm-bar span {
  position: absolute;
  bottom: -16px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 10px;
  color: #64748b;
  white-space: nowrap;
}
.adv-badge-1, .adv-badge-2 {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 8px;
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 8px 12px;
  box-shadow: 0 4px 16px rgba(0,0,0,.08);
}
.adv-badge-1 { top: -10px; right: -10px; }
.adv-badge-2 { bottom: -10px; left: -10px; }
.ab-icon { font-size: 20px; }
.ab-text { font-size: 11px; color: #64748b; line-height: 1.4; font-weight: 500; }

/* ===== 流程区域 ===== */
.process-section { background: #fff; }
.process-steps {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  flex-wrap: wrap;
}
.process-step {
  text-align: center;
  padding: 20px 16px;
  border-radius: 8px;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  flex: 1;
  min-width: 140px;
  max-width: 180px;
  position: relative;
}
.process-icon {
  width: 44px; height: 44px;
  border-radius: 10px;
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 12px;
  font-size: 20px;
  color: #2563eb;
}
.process-step h4 { font-size: 14px; font-weight: 600; color: #1e293b; margin-bottom: 6px; }
.process-step p { font-size: 12px; color: #64748b; line-height: 1.5; }
.process-arrow {
  color: #cbd5e1;
  font-size: 24px;
  margin: 0 8px;
}

/* ===== 底部 ===== */
.footer {
  background: #1e293b;
  color: #e2e8f0;
  padding: 60px 0 30px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-logo {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 16px;
}
.footer-desc {
  color: #94a3b8;
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 20px;
}
.footer-contact-item {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #94a3b8;
  font-size: 14px;
  margin-bottom: 10px;
}
.footer-contact-item span { flex-shrink: 0; }
.footer-col h5 {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 20px;
}
.footer-col a {
  display: block;
  color: #94a3b8;
  font-size: 14px;
  margin-bottom: 10px;
  transition: color .2s;
}
.footer-col a:hover { color: #3b82f6; }
.footer-bottom {
  border-top: 1px solid #334155;
  padding-top: 20px;
  text-align: center;
  color: #64748b;
  font-size: 13px;
}

/* ===== 产品详情页 ===== */
.pd-hero {
  padding: 100px 0 60px;
  background: linear-gradient(135deg, #fff 0%, #eff6ff 100%);
}
.pd-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}
.pd-visual {
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0,0,0,.06);
}
.pd-visual-inner {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.pd-tag {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  margin-bottom: 12px;
}
.pd-tag.blue { background: #eff6ff; border: 1px solid #bfdbfe; color: #2563eb; }
.pd-tag.green { background: #f0fdf4; border: 1px solid #bbf7d0; color: #10b981; }
.pd-tag.orange { background: #fffbeb; border: 1px solid #fde68a; color: #f59e0b; }
.pd-tag.purple { background: #faf5ff; border: 1px solid #e9d5ff; color: #7c3aed; }
.pd-text h2 { font-size: clamp(22px, 3vw, 28px); font-weight: 700; color: #1e293b; margin-bottom: 14px; }
.pd-text p { font-size: 14px; color: #64748b; line-height: 1.8; margin-bottom: 18px; }
.pd-features-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 20px;
}
.pd-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  padding: 10px;
}
.pd-feature-item .check { font-size: 12px; margin-top: 1px; flex-shrink: 0; }
.pd-feature-item span:last-child { font-size: 12px; color: #475569; }

/* ===== 关于我们 ===== */
.about-section { background: #f8fafc; }
.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}
.about-text h2 { font-size: clamp(26px, 4vw, 32px); font-weight: 700; color: #1e293b; margin-bottom: 16px; }
.about-text p { font-size: 15px; color: #64748b; line-height: 1.8; margin-bottom: 16px; }
.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 24px;
}
.stat-box {
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 16px;
  text-align: center;
}
.stat-box .num { font-size: 24px; font-weight: 800; color: #2563eb; }
.stat-box .label { font-size: 12px; color: #64748b; margin-top: 4px; }

/* 发展历程 */
.history-section { background: #fff; }
.timeline {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 2px;
  height: 100%;
  background: #e2e8f0;
}
.timeline-item {
  display: grid;
  grid-template-columns: 1fr 40px 1fr;
  gap: 20px;
  align-items: center;
  margin-bottom: 32px;
}
.timeline-item:nth-child(even) { direction: rtl; }
.timeline-item:nth-child(even) > * { direction: ltr; }
.timeline-year {
  font-size: 18px;
  font-weight: 700;
  color: #2563eb;
}
.timeline-dot {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid #2563eb;
  position: relative;
}
.timeline-content h4 { font-size: 15px; font-weight: 600; color: #1e293b; margin-bottom: 6px; }
.timeline-content p { font-size: 13px; color: #64748b; line-height: 1.6; }

/* ===== 下载专区 ===== */
.download-section { background: #f8fafc; }
.download-list { max-width: 900px; margin: 0 auto; }
.download-group {
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 20px;
}
.download-group-title {
  font-size: 16px;
  font-weight: 700;
  color: #1e293b;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid #e2e8f0;
}
.download-items {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 12px;
}
.download-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 14px;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  transition: all .2s;
}
.download-item:hover { background: #eff6ff; border-color: #bfdbfe; }
.download-info h5 { font-size: 14px; font-weight: 600; color: #1e293b; margin-bottom: 4px; }
.download-info p { font-size: 12px; color: #64748b; }
.download-btn {
  padding: 6px 14px;
  background: #2563eb;
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  border-radius: 4px;
  transition: all .2s;
}
.download-btn:hover { background: #1e40af; }

/* ===== 联系我们 ===== */
.contact-section { background: #fff; }
.contact-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}
.contact-info {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 10px;
  padding: 28px;
}
.contact-info h2 { font-size: clamp(22px, 4vw, 28px); font-weight: 700; color: #1e293b; margin-bottom: 24px; }
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 20px;
}
.contact-icon {
  width: 40px; height: 40px;
  border-radius: 8px;
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: #2563eb;
  flex-shrink: 0;
}
.contact-item h4 { font-size: 15px; font-weight: 600; color: #1e293b; margin-bottom: 4px; }
.contact-item p { font-size: 14px; color: #64748b; line-height: 1.6; }
.contact-qq {
  display: flex;
  gap: 10px;
  margin-top: 16px;
}
.qq-btn {
  flex: 1;
  padding: 10px 16px;
  background: #12b7f5;
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  border-radius: 6px;
  text-align: center;
  transition: all .2s;
}
.qq-btn:hover { background: #0a9fde; }

/* 联系信息列表样式 */
.contact-info-list {
  display: grid;
  gap: 20px;
}
.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 10px;
  padding: 20px;
}
.ci-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  flex-shrink: 0;
}
.ci-icon.blue { background: #eff6ff; }
.ci-icon.purple { background: #faf5ff; }
.ci-icon.orange { background: #fffbeb; }
.ci-icon.green { background: #f0fdf4; }
.ci-text {
  flex: 1;
  display: flex;
  flex-direction: column;
}
.ci-text h4 {
  font-size: 14px;
  font-weight: 600;
  color: #64748b;
  margin-bottom: 8px;
}
.ci-text a {
  font-size: 22px;
  font-weight: 700;
  color: #2563eb;
  text-decoration: none;
  transition: color .2s;
}
.ci-text a:hover { color: #1e40af; }

/* 服务时间 */
.service-time {
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  border-radius: 8px;
  padding: 16px;
  margin-top: 20px;
}
.service-time h4 { font-size: 14px; font-weight: 600; color: #166534; margin-bottom: 10px; }
.service-time p { font-size: 13px; color: #15803d; line-height: 1.6; margin-bottom: 6px; }

/* FAQ */
.faq-section { background: #f8fafc; }
.faq-grid {
  max-width: 800px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.faq-item {
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 18px;
}
.faq-item h4 { font-size: 14px; font-weight: 600; color: #1e293b; margin-bottom: 8px; }
.faq-item p { font-size: 13px; color: #64748b; line-height: 1.6; }

/* ===== 滚动淡入动画 ===== */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .6s ease, transform .6s ease;
}
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  .nav { display: none; }
  .hamburger { display: flex; }
  .nav.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #fff;
    padding: 16px;
    border-bottom: 1px solid #e2e8f0;
    gap: 8px;
  }
  .nav-btn { margin-left: 0; }
  .hero-content { max-width: 100%; }
  .hero-graphic { display: none; }
  .products-grid { grid-template-columns: 1fr; }
  .adv-wrap { grid-template-columns: 1fr; }
  .footer-content { grid-template-columns: 1fr; }
  .pd-content { grid-template-columns: 1fr; }
  .about-content { grid-template-columns: 1fr; }
  .contact-wrap { grid-template-columns: 1fr; }
  .timeline::before { left: 20px; }
  .timeline-item { grid-template-columns: 40px 1fr; gap: 16px; }
  .timeline-item:nth-child(even) { direction: ltr; }
  .timeline-year { display: none; }
  .faq-grid { grid-template-columns: 1fr; }
}