/* roulang page: index */
/* ========== 设计变量 ========== */
:root {
  --primary: #0F766E;
  --primary-dark: #115E59;
  --primary-light: #CCFBF1;
  --accent: #D97706;
  --accent-light: #FEF3C7;
  --bg-warm: #F8F6F3;
  --surface: #FFFFFF;
  --text-main: #1F2937;
  --text-muted: #6B7280;
  --border: #E5E7EB;
  --success: #10B981;
  --warning: #F59E0B;
  --danger: #EF4444;
  --dark-block: #1F2937;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --shadow-card: 0 1px 3px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.05);
  --shadow-hover: 0 8px 24px rgba(0,0,0,0.10);
  --shadow-hero: 0 12px 32px rgba(0,0,0,0.12);
  --container-w: 1200px;
  --transition: 0.25s ease;
  --header-top-h: 64px;
  --header-nav-h: 48px;
}

/* ========== Reset & Base ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text-main);
  background: var(--bg-warm);
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; transition: color var(--transition); }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, select, textarea { font-family: inherit; font-size: 1rem; }
.container {
  max-width: var(--container-w);
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}
.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 56px;
}
.section-head .tag-line {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary-dark);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 4px 14px;
  border-radius: 999px;
  letter-spacing: 0.5px;
  margin-bottom: 14px;
}
.section-head h2 {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-main);
  letter-spacing: -0.5px;
}
.section-head p {
  color: var(--text-muted);
  font-size: 0.9375rem;
  margin-top: 12px;
}

/* ========== 按钮 ========== */
.btn-primary,
.btn-accent,
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.9375rem;
  font-weight: 600;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  transition: all var(--transition);
  line-height: 1.4;
  border: 2px solid transparent;
  text-align: center;
  white-space: nowrap;
}
.btn-primary {
  background: var(--primary);
  color: #fff !important;
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(15,118,110,0.25);
}
.btn-primary:active {
  transform: translateY(0);
}
.btn-accent {
  background: var(--accent);
  color: #fff !important;
}
.btn-accent:hover {
  background: #b45309;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(217,119,6,0.25);
}
.btn-outline {
  background: transparent;
  border-color: var(--primary);
  color: var(--primary-dark) !important;
}
.btn-outline:hover {
  background: var(--primary-light);
  border-color: var(--primary);
}
.btn-outline-light {
  background: transparent;
  border-color: rgba(255,255,255,0.6);
  color: #fff !important;
}
.btn-outline-light:hover {
  background: rgba(255,255,255,0.12);
  border-color: #fff;
}
.btn-primary:focus-visible,
.btn-accent:focus-visible,
.btn-outline:focus-visible,
.btn-outline-light:focus-visible {
  outline: 3px solid rgba(15,118,110,0.35);
  outline-offset: 2px;
}

/* ========== 头部导航 ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--surface);
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}
.header-top {
  height: var(--header-top-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-icon {
  width: 38px;
  height: 38px;
  background: var(--primary);
  color: #fff;
  font-size: 1.25rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  letter-spacing: -1px;
  position: relative;
}
.logo-icon::after {
  content: '';
  position: absolute;
  bottom: 4px;
  right: 4px;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
}
.logo-text {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: 0.2px;
}
.header-tools {
  display: flex;
  align-items: center;
  gap: 16px;
}
.search-box {
  display: flex;
  align-items: center;
  background: var(--bg-warm);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 6px 6px 16px;
  width: 220px;
  transition: box-shadow var(--transition), border-color var(--transition);
}
.search-box input {
  border: none;
  outline: none;
  background: transparent;
  font-size: 0.875rem;
  color: var(--text-main);
  flex: 1;
  width: 100%;
}
.search-box button {
  width: 32px;
  height: 32px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8125rem;
  transition: background var(--transition);
}
.search-box button:hover { background: var(--primary-dark); }
.search-box:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(15,118,110,0.12);
}
.header-phone {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-main);
  font-weight: 600;
  font-size: 0.9375rem;
}
.header-phone i { color: var(--primary); font-size: 1.0625rem; }
.header-phone:hover { color: var(--primary); }
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 1.125rem;
  color: var(--text-main);
  background: var(--surface);
  align-items: center;
  justify-content: center;
  transition: border-color var(--transition), color var(--transition);
}
.nav-toggle:hover { color: var(--primary); border-color: var(--primary); }

.header-nav {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-top: 6px;
  padding-bottom: 6px;
}
.nav-link {
  padding: 7px 20px;
  border-radius: 999px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-main);
  border: 1px solid transparent;
  transition: all var(--transition);
}
.nav-link:hover {
  background: var(--primary-light);
  color: var(--primary-dark);
}
.nav-link.active {
  background: var(--primary-light);
  color: var(--primary-dark);
  font-weight: 600;
  box-shadow: inset 0 -2px 0 var(--primary);
}

/* ========== Hero ========== */
.hero {
  position: relative;
  background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
  color: #fff;
  padding: 100px 0 90px;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(15,23,42,0.82) 0%, rgba(31,41,55,0.55) 55%, rgba(31,41,55,0.25) 100%);
}
.hero-inner {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 60px;
}
.hero-content { flex: 1.1; }
.hero-content .hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.14);
  border: 1px solid rgba(255,255,255,0.2);
  backdrop-filter: blur(4px);
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 0.8125rem;
  color: #e2e8f0;
  margin-bottom: 22px;
}
.hero-content .hero-badge i { color: var(--accent); }
.hero-content h1 {
  font-size: clamp(2.5rem, 5vw, 3.4rem);
  font-weight: 700;
  line-height: 1.25;
  color: #fff;
  letter-spacing: -0.5px;
  margin-bottom: 18px;
}
.hero-content .hero-subtitle {
  font-size: 1.0625rem;
  color: #e2e8f0;
  max-width: 480px;
  line-height: 1.7;
  margin-bottom: 32px;
}
.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 42px;
}
.hero-stats-mini {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}
.hero-stats-mini .mini-item { 
  border-left: 2px solid var(--accent);
  padding-left: 14px;
}
.hero-stats-mini .mini-item strong {
  display: block;
  font-size: 1.375rem;
  font-weight: 700;
  line-height: 1.3;
  color: #fff;
  font-variant-numeric: tabular-nums;
}
.hero-stats-mini .mini-item span {
  font-size: 0.8125rem;
  color: #cbd5e1;
}
.hero-visual {
  flex: 0.9;
  position: relative;
  display: flex;
  justify-content: center;
}
.hero-chart-card {
  width: 100%;
  max-width: 380px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.16);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-lg);
  padding: 24px;
  position: relative;
  box-shadow: var(--shadow-hero);
}
.hero-chart-card .chart-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 18px;
}
.hero-chart-card .chart-head span {
  font-size: 0.875rem;
  color: #e2e8f0;
}
.trend-up {
  background: rgba(16,185,129,0.2);
  color: #34d399;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 0.8125rem;
  font-weight: 600;
}
.chart-bars {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  height: 130px;
  margin-top: 8px;
}
.chart-bars span {
  flex: 1;
  background: linear-gradient(to top, rgba(15,118,110,0.7), rgba(45,212,191,0.85));
  border-radius: 6px 6px 0 0;
  min-height: 12px;
  transition: height 0.4s ease;
}
.chart-bars span:hover { opacity: 0.85; }
.hero-float-card {
  position: absolute;
  bottom: -20px;
  left: -24px;
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-hover);
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 14px;
}
.hero-float-card .icon-circle {
  width: 38px;
  height: 38px;
  background: var(--accent-light);
  color: var(--accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}
.hero-float-card .float-txt span {
  font-size: 0.75rem;
  color: var(--text-muted);
}
.hero-float-card .float-txt strong {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-main);
  display: block;
  line-height: 1.2;
}

/* ========== 指标看板 ========== */
.metrics {
  background: var(--surface);
  padding: 70px 0;
  border-bottom: 1px solid var(--border);
}
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.metric-card {
  background: var(--bg-warm);
  border-radius: var(--radius-lg);
  padding: 26px 24px;
  border-bottom: 3px solid var(--primary);
  transition: transform var(--transition), box-shadow var(--transition);
}
.metric-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.metric-label {
  font-size: 0.8125rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 8px;
}
.metric-label .dot {
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
}
.metric-value {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
  margin-bottom: 6px;
}
.metric-value .unit {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-left: 2px;
}
.metric-trend {
  font-size: 0.8125rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}
.metric-trend .up { color: var(--success); font-weight: 600; }
.metric-trend .down { color: var(--danger); font-weight: 600; }

/* ========== 服务矩阵 ========== */
.services {
  padding: 90px 0;
  background: var(--bg-warm);
}
.services-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr 1fr;
  grid-auto-rows: minmax(210px, auto);
  gap: 24px;
}
.service-card {
  position: relative;
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition);
  overflow: hidden;
}
.service-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 24px;
  right: 24px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s ease;
}
.service-card:hover::after { transform: scaleX(1); }
.service-card:hover { box-shadow: var(--shadow-hover); border-color: var(--primary-light); }
.service-icon {
  width: 48px;
  height: 48px;
  background: var(--primary-light);
  color: var(--primary-dark);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.375rem;
  margin-bottom: 18px;
}
.service-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 8px;
}
.service-card p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.65;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.service-link {
  margin-top: 16px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.service-link i { transition: transform var(--transition); }
.service-link:hover { color: var(--primary-dark); }
.service-link:hover i { transform: translateX(4px); }
.service-card.large {
  grid-row: span 2;
  background: linear-gradient(135deg, #fdfcfb 0%, var(--primary-light) 130%);
  border-color: var(--primary-light);
}
.service-card.large .service-icon {
  background: var(--primary);
  color: #fff;
}
.service-card.large p {
  -webkit-line-clamp: 4;
  max-width: 420px;
}
.service-card.large .service-link {
  margin-top: auto;
}
.service-card.large::after {
  left: 32px;
  right: 32px;
}

/* ========== 结果对比 ========== */
.compare-section {
  position: relative;
  background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
  color: #fff;
  padding: 90px 0;
}
.compare-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(31,41,55,0.92);
}
.compare-section .container {
  position: relative;
  z-index: 2;
}
.compare-head {
  text-align: center;
  margin-bottom: 56px;
}
.compare-head h2 {
  font-size: 2rem;
  font-weight: 700;
  color: #fff;
}
.compare-head p {
  color: #94a3b8;
  margin-top: 10px;
}
.compare-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 32px;
  align-items: stretch;
}
.compare-col {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
}
.compare-col h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.compare-col h3 .fa-circle-check { color: #34d399; }
.compare-col h3 .fa-circle-xmark { color: #f87171; }
.compare-col ul li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px dashed rgba(255,255,255,0.08);
  font-size: 0.9375rem;
  color: #cbd5e1;
}
.compare-col ul li:last-child { border-bottom: none; }
.compare-col ul li i {
  margin-top: 5px;
  font-size: 0.8125rem;
}
.compare-col.old h3 { color: #94a3b8; }
.compare-col.new h3 { color: #34d399; }
.vs-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  background: var(--accent);
  color: #fff;
  font-weight: 800;
  font-size: 1.125rem;
  border-radius: 50%;
  box-shadow: 0 0 0 6px rgba(217,119,6,0.2);
  align-self: center;
}
.compare-cta {
  text-align: center;
  margin-top: 48px;
}

/* ========== 流程步骤 ========== */
.process {
  padding: 90px 0;
  background: var(--surface);
}
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.process-step {
  position: relative;
  background: var(--bg-warm);
  border-radius: var(--radius-lg);
  padding: 36px 24px 28px;
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
}
.process-step:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}
.step-num {
  width: 44px;
  height: 44px;
  background: var(--primary);
  color: #fff;
  font-weight: 700;
  font-size: 1.0625rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}
.process-step h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 8px;
}
.process-step p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
}
.step-line {
  position: absolute;
  top: 60px;
  right: -24px;
  width: 24px;
  height: 2px;
  background: var(--primary-light);
}

/* ========== 最新资讯 ========== */
.news {
  padding: 90px 0;
  background: var(--bg-warm);
}
.news-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.news-card {
  display: flex;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
}
.news-card:hover {
  box-shadow: var(--shadow-hover);
  border-color: var(--primary-light);
}
.news-thumb {
  width: 240px;
  flex-shrink: 0;
  overflow: hidden;
  position: relative;
}
.news-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 4 / 3;
  transition: transform 0.35s ease;
}
.news-card:hover .news-thumb img { transform: scale(1.03); }
.news-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  flex: 1;
}
.news-body h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 8px;
  line-height: 1.4;
  transition: color var(--transition);
}
.news-card:hover .news-body h3 { color: var(--primary); }
.news-body p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 12px;
}
.news-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.8125rem;
  color: var(--text-muted);
}
.badge {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary-dark);
  font-size: 0.75rem;
  font-weight: 500;
  padding: 2px 10px;
  border-radius: 999px;
}
.empty-state {
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  text-align: center;
  padding: 60px 24px;
  color: var(--text-muted);
}
.empty-state i {
  font-size: 2rem;
  color: var(--border);
  margin-bottom: 12px;
  display: block;
}
.empty-state p {
  font-size: 0.9375rem;
}

/* ========== FAQ ========== */
.faq {
  padding: 90px 0;
  background: var(--surface);
}
.faq-list {
  max-width: 820px;
  margin: 0 auto;
}
.faq-item {
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}
.faq-item:first-child { border-top: 1px solid var(--border); }
.faq-item.active { background: rgba(204,251,241,0.2); }
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 20px 8px;
  text-align: left;
  gap: 16px;
}
.faq-question .q-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-main);
  flex: 1;
}
.faq-question .q-icon {
  width: 30px;
  height: 30px;
  border: 1px solid var(--border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8125rem;
  color: var(--text-muted);
  flex-shrink: 0;
  transition: all 0.3s ease;
}
.faq-item.active .q-icon {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  transform: rotate(45deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 8px;
}
.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 8px 20px;
}
.faq-answer p {
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ========== 转化表单 ========== */
.contact-section {
  padding: 90px 0;
  background: var(--bg-warm);
}
.contact-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
  padding: 48px;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
}
.contact-card h2 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 10px;
}
.contact-card .contact-intro {
  color: var(--text-muted);
  margin-bottom: 28px;
  font-size: 0.9375rem;
}
.lead-form { display: flex; flex-direction: column; gap: 16px; }
.form-group label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-main);
  margin-bottom: 6px;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  height: 44px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0 14px;
  font-size: 0.9375rem;
  background: var(--surface);
  color: var(--text-main);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-group textarea {
  height: auto;
  padding: 12px 14px;
  resize: vertical;
  min-height: 100px;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(15,118,110,0.12);
}
.lead-form .btn-primary { width: 100%; height: 52px; margin-top: 6px; font-size: 1rem; }
.contact-info {
  background: var(--primary-light);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
  gap: 22px;
}
.contact-info h3 {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 4px;
}
.info-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}
.info-item i {
  width: 36px;
  height: 36px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9375rem;
  flex-shrink: 0;
}
.info-item .info-txt span {
  display: block;
  font-size: 0.8125rem;
  color: var(--primary-dark);
  opacity: 0.7;
}
.info-item .info-txt strong {
  font-size: 0.9375rem;
  color: var(--text-main);
  font-weight: 600;
}
.qr-placeholder {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: center;
  margin-top: 8px;
}
.qr-placeholder i {
  font-size: 2.5rem;
  color: var(--primary);
  margin-bottom: 6px;
  display: block;
}
.qr-placeholder span {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* ========== 页脚 ========== */
.site-footer {
  background: var(--dark-block);
  color: #cbd5e1;
  padding-top: 64px;
}
.footer-main {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
}
.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.footer-logo .logo-icon {
  width: 34px;
  height: 34px;
  font-size: 1.0625rem;
}
.footer-logo .logo-text {
  color: #fff;
  font-size: 1.125rem;
}
.footer-brand p {
  font-size: 0.875rem;
  line-height: 1.7;
  color: #94a3b8;
  max-width: 300px;
}
.footer-social {
  display: flex;
  gap: 10px;
  margin-top: 18px;
}
.footer-social a {
  width: 36px;
  height: 36px;
  border: 1px solid rgba(255,255,255,0.16);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9375rem;
  color: #94a3b8;
  transition: all var(--transition);
}
.footer-social a:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
.footer-col h4 {
  color: #fff;
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 18px;
}
.footer-col a,
.footer-col p {
  display: block;
  font-size: 0.875rem;
  color: #94a3b8;
  margin-bottom: 10px;
  transition: color var(--transition);
}
.footer-col a:hover { color: var(--primary-light); }
.footer-col p i {
  width: 20px;
  color: var(--primary-light);
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 20px 0;
  text-align: center;
  font-size: 0.8125rem;
  color: #94a3b8;
}

/* ========== 返回顶部 ========== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 44px;
  height: 44px;
  background: var(--primary);
  color: #fff;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  box-shadow: var(--shadow-hover);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
  z-index: 99;
}
.back-to-top.show {
  opacity: 1;
  visibility: visible;
}
.back-to-top:hover {
  background: var(--primary-dark);
  transform: translateY(-3px);
}

/* ========== 响应式 ========== */
@media (max-width: 1023px) {
  .services-grid {
    grid-template-columns: 1fr 1fr;
    grid-auto-rows: auto;
  }
  .service-card.large { grid-row: span 1; }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .metrics-grid { grid-template-columns: repeat(2, 1fr); }
  .compare-grid { grid-template-columns: 1fr; gap: 20px; }
  .vs-badge { width: 44px; height: 44px; }
  .footer-main {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .search-box { display: none; }
  .header-phone span { display: none; }
}

@media (max-width: 768px) {
  .header-top { height: auto; padding: 14px 20px; }
  .nav-toggle { display: flex; }
  .header-tools { gap: 8px; }
  .header-phone { font-size: 0.9375rem; }
  .header-nav {
    display: none;
    border-top: none;
    padding: 0 20px 16px;
  }
  .header-nav.open { display: block; }
  .nav-links {
    flex-direction: column;
    align-items: stretch;
    padding: 0;
    gap: 6px;
  }
  .nav-link { border-radius: var(--radius-md); text-align: center; }
  .hero { padding: 64px 0 60px; }
  .hero-inner { flex-direction: column; gap: 40px; }
  .hero-visual { display: none; }
  .hero-stats-mini { gap: 20px; }
  .services-grid { grid-template-columns: 1fr; }
  .section-head { margin-bottom: 36px; }
  .section-head h2 { font-size: 1.625rem; }
  .metrics-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .metric-value { font-size: 1.75rem; }
  .process-grid { grid-template-columns: 1fr; }
  .step-line { display: none; }
  .news-card { flex-direction: column; }
  .news-thumb { width: 100%; }
  .news-thumb img { aspect-ratio: 16 / 9; }
  .contact-card { grid-template-columns: 1fr; padding: 28px 20px; }
  .footer-main { grid-template-columns: 1fr; gap: 28px; }
  .footer-brand p { max-width: 100%; }
  .compare-grid { gap: 16px; }
  .compare-col { padding: 24px 20px; }
}

@media (max-width: 520px) {
  .hero-content h1 { font-size: 2rem; }
  .hero-cta { flex-direction: column; align-items: stretch; }
  .btn-primary, .btn-outline, .btn-accent { width: 100%; }
  .metrics-grid { grid-template-columns: 1fr 1fr; }
  .metric-card { padding: 18px 14px; }
  .footer-main { grid-template-columns: 1fr; }
  .back-to-top { bottom: 20px; right: 20px; }
}

/* roulang page: article */
:root {
            --primary: #0F766E;
            --primary-dark: #115E59;
            --primary-light: #CCFBF1;
            --accent: #D97706;
            --accent-light: #FEF3C7;
            --bg: #F8F6F3;
            --card: #FFFFFF;
            --text: #1F2937;
            --muted: #6B7280;
            --border: #E5E7EB;
            --success: #10B981;
            --warning: #F59E0B;
            --error: #EF4444;
            --dark-block: #1F2937;
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-input: 6px;
            --shadow-card: 0 1px 3px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.05);
            --shadow-card-hover: 0 8px 24px rgba(0,0,0,0.10);
            --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --transition: 0.25s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            font-size: 1rem;
            line-height: 1.75;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }

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

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            border: none;
            outline: none;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* ===== Header ===== */
        .site-header {
            background: var(--card);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 1px 6px rgba(0, 0, 0, 0.04);
        }

        .header-top {
            height: 64px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .logo-icon {
            width: 38px;
            height: 38px;
            background: var(--primary);
            color: #fff;
            font-size: 1.25rem;
            font-weight: 700;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 2px 8px rgba(15, 118, 110, 0.3);
        }

        .logo-text {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text);
            letter-spacing: 0.5px;
            position: relative;
        }

        .logo-text::after {
            content: "";
            width: 6px;
            height: 6px;
            background: var(--accent);
            border-radius: 50%;
            display: inline-block;
            margin-left: 4px;
            vertical-align: middle;
        }

        .header-tools {
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: 4px 6px 4px 16px;
            height: 38px;
            width: 220px;
            transition: border-color var(--transition);
        }

        .search-box:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.15);
        }

        .search-box input {
            flex: 1;
            background: transparent;
            font-size: 0.875rem;
            color: var(--text);
        }

        .search-box input::placeholder {
            color: var(--muted);
        }

        .search-box button {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: background var(--transition);
        }

        .search-box button:hover {
            background: var(--primary-dark);
        }

        .header-phone {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text);
            padding: 6px 14px;
            border-radius: 999px;
            background: var(--accent-light);
            transition: background var(--transition), color var(--transition);
        }

        .header-phone:hover {
            background: var(--accent);
            color: #fff;
        }

        .nav-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 8px;
            background: var(--primary-light);
            color: var(--primary-dark);
            font-size: 1.1rem;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            transition: background var(--transition);
        }

        .nav-toggle:hover {
            background: var(--primary);
            color: #fff;
        }

        .header-nav {
            border-top: 1px solid var(--border);
            background: var(--card);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            padding-top: 8px;
            padding-bottom: 8px;
            overflow-x: auto;
            scrollbar-width: none;
        }

        .nav-links::-webkit-scrollbar {
            display: none;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 6px 18px;
            border-radius: 999px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text);
            white-space: nowrap;
            transition: background var(--transition), color var(--transition);
        }

        .nav-link:hover {
            background: var(--primary-light);
            color: var(--primary-dark);
        }

        .nav-link.active {
            background: var(--primary-light);
            color: var(--primary-dark);
            font-weight: 600;
            box-shadow: inset 0 -2px 0 var(--primary);
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            padding: 18px 0;
            font-size: 0.85rem;
            color: var(--muted);
        }

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

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

        .breadcrumb .sep {
            margin: 0 8px;
            color: var(--border);
        }

        .breadcrumb .current {
            color: var(--text);
            font-weight: 500;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            max-width: 320px;
            display: inline-block;
            vertical-align: bottom;
        }

        /* ===== Article ===== */
        .article-wrapper {
            background: var(--card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 40px 48px;
            margin-bottom: 32px;
        }

        .article-header {
            margin-bottom: 32px;
            border-bottom: 1px solid var(--border);
            padding-bottom: 28px;
        }

        .article-title {
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            font-weight: 700;
            line-height: 1.3;
            color: var(--text);
            margin-bottom: 16px;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 0.875rem;
            color: var(--muted);
        }

        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .article-meta i {
            color: var(--primary);
        }

        .category-badge {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary-dark);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 2px 12px;
            border-radius: 999px;
            margin-left: 4px;
        }

        /* ===== Article Content ===== */
        .article-content {
            max-width: 720px;
            font-size: 1rem;
            line-height: 1.75;
            color: var(--text);
        }

        .article-content h2 {
            font-size: 1.5rem;
            font-weight: 700;
            margin: 32px 0 16px;
            padding-bottom: 8px;
            border-bottom: 1px solid var(--border);
            color: var(--text);
        }

        .article-content h3 {
            font-size: 1.2rem;
            font-weight: 600;
            margin: 24px 0 12px;
            color: var(--text);
        }

        .article-content p {
            margin-bottom: 16px;
        }

        .article-content ul,
        .article-content ol {
            margin: 0 0 16px 24px;
        }

        .article-content li {
            margin-bottom: 6px;
        }

        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-light);
            padding: 12px 20px;
            margin: 20px 0;
            border-radius: 0 8px 8px 0;
            color: var(--text);
            font-style: normal;
        }

        .article-content blockquote p {
            margin-bottom: 0;
        }

        .article-content img {
            border-radius: var(--radius-card);
            margin: 20px 0;
            box-shadow: var(--shadow-card);
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0;
            font-size: 0.9rem;
        }

        .article-content th {
            background: var(--primary-light);
            color: var(--primary-dark);
            text-align: left;
        }

        .article-content th,
        .article-content td {
            border: 1px solid var(--border);
            padding: 10px 14px;
        }

        .article-content code {
            background: var(--bg);
            padding: 2px 6px;
            border-radius: 4px;
            font-size: 0.85em;
            color: var(--primary-dark);
        }

        .article-content pre {
            background: var(--dark-block);
            color: #F9FAFB;
            padding: 20px;
            border-radius: 8px;
            overflow-x: auto;
            margin: 20px 0;
            line-height: 1.6;
        }

        .article-content pre code {
            background: transparent;
            color: inherit;
            padding: 0;
        }

        /* ===== Article Tags ===== */
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 36px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
        }

        .article-tags a {
            display: inline-block;
            background: var(--bg);
            color: var(--muted);
            font-size: 0.8rem;
            padding: 4px 12px;
            border-radius: 999px;
            border: 1px solid var(--border);
            transition: all var(--transition);
        }

        .article-tags a:hover {
            background: var(--primary-light);
            color: var(--primary-dark);
            border-color: var(--primary);
        }

        /* ===== Empty State ===== */
        .article-empty {
            text-align: center;
            padding: 60px 20px;
            background: var(--card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            margin-bottom: 32px;
        }

        .article-empty i {
            font-size: 3rem;
            color: var(--border);
            margin-bottom: 16px;
        }

        .article-empty p {
            color: var(--muted);
            font-size: 1.1rem;
            margin-bottom: 20px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            font-size: 0.95rem;
            padding: 10px 24px;
            border-radius: var(--radius-btn);
            cursor: pointer;
            border: none;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(15, 118, 110, 0.3);
        }

        .btn-primary:focus-visible,
        .btn-secondary:focus-visible,
        .nav-toggle:focus-visible,
        .search-box button:focus-visible {
            outline: 3px solid rgba(15, 118, 110, 0.3);
            outline-offset: 2px;
        }

        /* ===== Related ===== */
        .related-section {
            background: var(--card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 36px 48px;
            margin-bottom: 32px;
        }

        .related-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 24px;
        }

        .related-header h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text);
            position: relative;
            padding-left: 14px;
        }

        .related-header h3::before {
            content: "";
            position: absolute;
            left: 0;
            top: 2px;
            width: 4px;
            height: 22px;
            background: var(--primary);
            border-radius: 2px;
        }

        .related-link {
            font-size: 0.85rem;
            color: var(--muted);
        }

        .related-link i {
            transition: transform var(--transition);
        }

        .related-link:hover i {
            transform: translateX(4px);
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .related-card {
            background: var(--bg);
            border-radius: 10px;
            overflow: hidden;
            transition: transform var(--transition), box-shadow var(--transition);
            border: 1px solid var(--border);
        }

        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }

        .related-card .thumb {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--border);
        }

        .related-card .thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition);
        }

        .related-card:hover .thumb img {
            transform: scale(1.03);
        }

        .related-card .info {
            padding: 16px;
        }

        .related-card h4 {
            font-size: 0.95rem;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 8px;
            color: var(--text);
            transition: color var(--transition);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card:hover h4 {
            color: var(--primary);
        }

        .related-card .time {
            font-size: 0.8rem;
            color: var(--muted);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        /* ===== Back Button ===== */
        .back-wrap {
            text-align: center;
            margin-bottom: 48px;
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--primary);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 10px 24px;
            border-radius: var(--radius-btn);
            border: 2px solid var(--primary);
            cursor: pointer;
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }

        .btn-secondary:hover {
            background: var(--primary-light);
            color: var(--primary-dark);
            transform: translateY(-2px);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--dark-block);
            color: #D1D5DB;
            margin-top: 24px;
        }

        .footer-main {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-top: 56px;
            padding-bottom: 48px;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }

        .footer-logo .logo-icon {
            background: var(--accent);
            box-shadow: 0 2px 10px rgba(217, 119, 6, 0.3);
        }

        .footer-logo .logo-text {
            color: #F9FAFB;
            font-size: 1.15rem;
        }

        .footer-brand p {
            font-size: 0.9rem;
            color: #9CA3AF;
            line-height: 1.7;
            max-width: 320px;
            margin-bottom: 20px;
        }

        .footer-social {
            display: flex;
            gap: 12px;
        }

        .footer-social a {
            width: 36px;
            height: 36px;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #D1D5DB;
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }

        .footer-social a:hover {
            background: var(--accent);
            color: #fff;
            transform: translateY(-3px);
        }

        .footer-col h4 {
            color: #F9FAFB;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 16px;
            position: relative;
            padding-bottom: 8px;
        }

        .footer-col h4::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 24px;
            height: 2px;
            background: var(--accent);
        }

        .footer-col a {
            display: block;
            color: #9CA3AF;
            font-size: 0.9rem;
            padding: 4px 0;
            transition: color var(--transition), padding-left var(--transition);
        }

        .footer-col a:hover {
            color: var(--accent);
            padding-left: 6px;
        }

        .footer-col p {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            color: #9CA3AF;
            padding: 4px 0;
        }

        .footer-col p i {
            width: 18px;
            color: var(--accent);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0;
        }

        .footer-bottom .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
        }

        .footer-bottom p {
            font-size: 0.85rem;
            color: #6B7280;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1023px) {
            .search-box {
                width: 170px;
            }

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

            .footer-main {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 767px) {
            .search-box {
                display: none;
            }

            .header-phone span {
                display: none;
            }

            .header-phone {
                padding: 6px 10px;
            }

            .nav-toggle {
                display: flex;
            }

            .header-nav {
                display: none;
                border-top: 1px solid var(--border);
                box-shadow: 0 8px 20px rgba(0, 0, 0, 0.06);
            }

            .header-nav.open {
                display: block;
            }

            .nav-links {
                flex-direction: column;
                align-items: stretch;
                padding: 12px 20px;
                overflow-x: visible;
            }

            .nav-link {
                border-radius: 8px;
                padding: 10px 14px;
                white-space: normal;
            }

            .article-wrapper {
                padding: 24px 20px;
            }

            .article-title {
                font-size: 1.35rem;
            }

            .article-meta {
                gap: 8px;
                font-size: 0.8rem;
            }

            .related-section {
                padding: 24px 20px;
            }

            .related-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .footer-main {
                grid-template-columns: 1fr;
                gap: 28px;
                padding-top: 40px;
                padding-bottom: 32px;
            }

            .footer-bottom .container {
                justify-content: center;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .article-meta {
                flex-direction: column;
                gap: 6px;
            }

            .related-grid {
                grid-template-columns: 1fr;
            }

            .back-wrap .btn-secondary {
                width: 100%;
                justify-content: center;
            }
        }

/* roulang page: category1 */
:root {
  --primary: #0F766E;
  --primary-dark: #115E59;
  --primary-light: #CCFBF1;
  --accent: #D97706;
  --accent-light: #FEF3C7;
  --bg: #F8F6F3;
  --card-bg: #FFFFFF;
  --text-main: #1F2937;
  --text-muted: #6B7280;
  --border: #E5E7EB;
  --success: #10B981;
  --warning: #F59E0B;
  --error: #EF4444;
  --dark-block: #1F2937;
  --radius-card: 12px;
  --radius-btn: 8px;
  --radius-input: 6px;
  --shadow-card: 0 1px 3px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.05);
  --shadow-hover: 0 8px 24px rgba(0,0,0,0.10);
  --transition: all 0.25s ease;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: var(--bg);
  color: var(--text-main);
  line-height: 1.75;
  min-width: 320px;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: var(--transition); }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, select, textarea { font-family: inherit; font-size: 1rem; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: 600;
  padding: 12px 30px;
  border-radius: var(--radius-btn);
  transition: var(--transition);
  border: 1px solid transparent;
  gap: 8px;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(15,118,110,0.3); }
.btn-accent { background: var(--accent); color: #fff; }
.btn-accent:hover { background: #b45309; transform: translateY(-2px); box-shadow: 0 8px 20px rgba(217,119,6,0.3); }
.btn:focus-visible { outline: 3px solid rgba(15,118,110,0.3); outline-offset: 2px; }

/* ===== Header ===== */
.site-header {
  background: #fff;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}
.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.logo { display: flex; align-items: center; gap: 10px; }
.logo-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: var(--primary);
  color: #fff;
  font-weight: 700;
  font-size: 1.25rem;
  border-radius: 10px;
}
.logo-text {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: 0.5px;
}
.logo-text::after {
  content: "";
  display: inline-block;
  width: 5px;
  height: 5px;
  background: var(--accent);
  border-radius: 50%;
  margin-left: 6px;
  vertical-align: middle;
}
.header-tools { display: flex; align-items: center; gap: 16px; }
.search-box { position: relative; }
.search-box input {
  width: 200px;
  height: 38px;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0 40px 0 16px;
  font-size: 0.875rem;
  background: var(--bg);
  transition: var(--transition);
}
.search-box input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(15,118,110,0.2);
}
.search-box button {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 0.875rem;
}
.header-phone {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--primary-dark);
  font-weight: 600;
  font-size: 0.875rem;
}
.header-phone:hover { color: var(--primary); }
.nav-toggle {
  display: none;
  font-size: 1.25rem;
  color: var(--text-main);
  padding: 8px;
  border-radius: 8px;
}
.nav-toggle:hover { background: var(--bg); }

.header-nav { background: #fff; border-top: 1px solid var(--border); }
.nav-links { display: flex; align-items: center; gap: 8px; height: 48px; }
.nav-link {
  display: inline-flex;
  align-items: center;
  padding: 6px 22px;
  border-radius: 999px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-main);
  border: 1px solid transparent;
  white-space: nowrap;
}
.nav-link:hover {
  background: var(--primary-light);
  color: var(--primary-dark);
  border-color: rgba(15,118,110,0.15);
}
.nav-link.active {
  background: var(--primary-light);
  color: var(--primary-dark);
  font-weight: 600;
  border-color: rgba(15,118,110,0.15);
  box-shadow: inset 0 -2px 0 var(--primary);
}

/* ===== 分类横幅 ===== */
.cat-banner {
  position: relative;
  padding: 110px 0;
  background-size: cover;
  background-position: center;
}
.cat-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(31, 41, 55, 0.55);
}
.cat-banner .container {
  position: relative;
  z-index: 2;
  text-align: center;
}
.banner-tag {
  display: inline-block;
  padding: 6px 18px;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 999px;
  color: #fff;
  font-size: 0.8125rem;
  margin-bottom: 18px;
  letter-spacing: 0.5px;
}
.cat-banner h1 {
  color: #fff;
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 14px;
}
.cat-banner .banner-sub {
  color: rgba(255,255,255,0.92);
  font-size: 1.125rem;
  margin-bottom: 32px;
}

/* ===== 分类描述 ===== */
.intro-section { padding: 64px 0; }
.intro-card {
  max-width: 880px;
  margin: 0 auto;
  background: var(--card-bg);
  border-radius: var(--radius-card);
  padding: 40px 48px;
  text-align: center;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border);
}
.intro-card p {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text-main);
}

/* ===== 板块标题 ===== */
.section-head {
  text-align: center;
  margin-bottom: 48px;
}
.section-head .en-tag {
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 8px;
}
.section-head h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.3;
}
.section-head p {
  color: var(--text-muted);
  margin-top: 8px;
}
.section-head.light h2 { color: #fff; }
.section-head.light p { color: rgba(255,255,255,0.7); }
.section-head.light .en-tag { color: var(--accent); }

/* ===== 服务卡片 ===== */
.services-section { padding: 64px 0; background: #fff; }
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.service-card {
  background: var(--card-bg);
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.service-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
  border-color: rgba(15,118,110,0.25);
}
.service-card .cover-wrap {
  aspect-ratio: 16/9;
  overflow: hidden;
}
.service-card .cover-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.service-card:hover .cover-wrap img { transform: scale(1.04); }
.service-card .card-body {
  padding: 22px 24px 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.service-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 10px;
  line-height: 1.4;
}
.service-card p {
  color: var(--text-muted);
  font-size: 0.9375rem;
  line-height: 1.65;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  flex: 1;
}
.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary);
  font-weight: 500;
  font-size: 0.9375rem;
  margin-top: 16px;
}
.card-link:hover { color: var(--accent); gap: 10px; }

/* ===== 数据指标 ===== */
.stats-section {
  background: var(--dark-block);
  padding: 72px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}
.stat-item {
  padding: 8px 4px;
  border-left: 1px solid rgba(255,255,255,0.1);
}
.stat-item:first-child { border-left: none; }
.stat-tag {
  color: var(--accent);
  font-size: 0.875rem;
  letter-spacing: 1px;
  font-weight: 500;
}
.stat-number {
  color: #fff;
  font-size: 2.75rem;
  font-weight: 700;
  line-height: 1.2;
  margin: 10px 0 6px;
  font-variant-numeric: tabular-nums;
}
.stat-trend {
  color: rgba(255,255,255,0.65);
  font-size: 0.875rem;
}

/* ===== 流程 ===== */
.process-section { padding: 72px 0; background: #fff; }
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.process-item {
  background: var(--card-bg);
  border-radius: var(--radius-card);
  padding: 28px 24px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
  transition: var(--transition);
}
.process-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.step-num {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 16px;
  display: block;
}
.process-item h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-bottom: 10px;
}
.process-item p {
  color: var(--text-muted);
  font-size: 0.875rem;
  line-height: 1.6;
}

/* ===== FAQ ===== */
.faq-section { padding: 72px 0; }
.faq-list {
  max-width: 820px;
  margin: 0 auto;
}
.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  margin-bottom: 14px;
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: rgba(15,118,110,0.3); }
.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  font-size: 1rem;
  font-weight: 600;
  width: 100%;
  text-align: left;
  background: transparent;
  color: var(--text-main);
}
.faq-question:hover { color: var(--primary-dark); }
.faq-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  position: relative;
  margin-left: 16px;
}
.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  background: var(--primary);
  transition: all 0.3s ease;
  border-radius: 2px;
}
.faq-icon::before {
  width: 14px;
  height: 2px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
.faq-icon::after {
  width: 2px;
  height: 14px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
.faq-item.active .faq-icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
  opacity: 0;
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}
.faq-answer p {
  padding: 0 24px 20px;
  color: var(--text-muted);
  font-size: 0.9375rem;
  line-height: 1.7;
}
.faq-item.active .faq-answer { max-height: 260px; }

/* ===== CTA ===== */
.cta-section {
  padding: 72px 0;
  background: var(--primary);
  text-align: center;
}
.cta-section h2 {
  color: #fff;
  font-size: 1.875rem;
  font-weight: 700;
  margin-bottom: 12px;
}
.cta-section p {
  color: rgba(255,255,255,0.9);
  font-size: 1.0625rem;
  margin-bottom: 32px;
}
.cta-section .btn {
  min-width: 160px;
}

/* ===== Footer ===== */
.site-footer {
  background: #111827;
  color: #9CA3AF;
}
.footer-main {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  padding: 64px 0 40px;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.footer-logo .logo-icon {
  background: var(--primary);
  color: #fff;
}
.footer-logo .logo-text {
  color: #fff;
  font-size: 1.125rem;
}
.footer-brand p {
  margin-top: 16px;
  font-size: 0.875rem;
  line-height: 1.6;
  color: #9CA3AF;
}
.footer-social {
  margin-top: 20px;
  display: flex;
  gap: 12px;
}
.footer-social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  color: #fff;
  font-size: 0.9375rem;
}
.footer-social a:hover {
  background: var(--primary);
  transform: translateY(-2px);
}
.footer-col h4 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
}
.footer-col a {
  display: block;
  font-size: 0.875rem;
  color: #9CA3AF;
  padding: 4px 0;
}
.footer-col a:hover {
  color: var(--primary-light);
  padding-left: 4px;
}
.footer-col p {
  font-size: 0.875rem;
  color: #9CA3AF;
  margin-bottom: 6px;
}
.footer-col i {
  width: 20px;
  color: var(--primary);
  margin-right: 4px;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 20px 0;
}
.footer-bottom .container {
  display: flex;
  justify-content: center;
  font-size: 0.8125rem;
  color: #6B7280;
}

/* ===== 响应式 ===== */
@media (max-width: 1023px) {
  .search-box { display: none; }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .stat-item { border-left: none; border-bottom: 1px solid rgba(255,255,255,0.1); padding: 16px 8px; }
  .footer-main { grid-template-columns: repeat(2, 1fr); gap: 32px; }
  .nav-toggle { display: block; }
  .header-nav { display: none; }
  .header-nav.open { display: block; border-top: 1px solid var(--border); }
  .nav-links {
    height: auto;
    padding: 12px 20px;
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
  .nav-link { width: 100%; padding: 10px 16px; }
}

@media (max-width: 767px) {
  .header-top { height: auto; padding: 12px 0; }
  .header-phone span { display: none; }
  .header-phone i { font-size: 1.125rem; }
  .cat-banner { padding: 68px 0; }
  .cat-banner h1 { font-size: 1.75rem; }
  .cat-banner .banner-sub { font-size: 0.9375rem; }
  .intro-section { padding: 48px 0; }
  .intro-card { padding: 28px 22px; }
  .section-head { margin-bottom: 32px; }
  .section-head h2 { font-size: 1.5rem; }
  .services-section { padding: 48px 0; }
  .services-grid { grid-template-columns: 1fr; gap: 18px; }
  .stats-section { padding: 48px 0; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .stat-number { font-size: 2rem; }
  .process-section { padding: 48px 0; }
  .process-grid { grid-template-columns: 1fr; gap: 16px; }
  .faq-section { padding: 48px 0; }
  .faq-question { padding: 16px 18px; font-size: 0.9375rem; }
  .faq-answer p { padding: 0 18px 16px; font-size: 0.875rem; }
  .cta-section { padding: 48px 0; }
  .cta-section h2 { font-size: 1.375rem; }
  .cta-section p { font-size: 0.9375rem; }
  .footer-main { grid-template-columns: 1fr; padding: 48px 0 24px; gap: 28px; }
  .footer-bottom .container { flex-direction: column; text-align: center; }
}