/* ============================================
   山东利明源贸易咨询有限公司 - 官网样式
   风格：简约大气，商务金色调
   ============================================ */

/* === 基础重置 === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  color: #1a1f2e;
  background: #fff;
  line-height: 1.7;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* === 设计变量 === */
:root {
  --yellow-900: #1a1508;
  --yellow-800: #29200a;
  --yellow-700: #4a3808;
  --yellow-600: #7a5c0a;
  --yellow-500: #b88a1a;
  --yellow-400: #d4a530;
  --yellow-300: #e0b84a;
  --yellow-100: #fef0b8;
  --yellow-50:  #fffaeb;

  --gray-900: #1a1f2e;
  --gray-700: #374151;
  --gray-500: #6b7280;
  --gray-300: #d1d5db;
  --gray-100: #f3f4f6;
  --gray-50:  #f8f9fa;

  --gold: #c9a227;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 20px;

  --shadow-sm: 0 1px 4px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);

  --nav-h: 72px;
  --transition: 0.25s ease;
}

/* === 布局 === */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.section { padding: 80px 0; }
.section-gray { background: var(--gray-50); }
.section-dark { background: var(--yellow-800); }

/* === 通用组件 === */
.section-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--yellow-500);
  background: var(--yellow-50);
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 16px;
}
.section-tag-white {
  color: rgba(255,255,255,0.9);
  background: rgba(255,255,255,0.15);
}
.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 56px;
}
.section-title {
  font-size: clamp(26px, 4vw, 36px);
  font-weight: 700;
  line-height: 1.3;
  color: var(--gray-900);
  margin-bottom: 16px;
}
.section-desc {
  font-size: 16px;
  color: var(--gray-500);
  line-height: 1.7;
}

/* === 按钮 === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  transition: all var(--transition);
  cursor: pointer;
  letter-spacing: 0.02em;
}
.btn-primary {
  background: var(--yellow-500);
  color: #fff;
}
.btn-primary:hover { background: var(--yellow-400); transform: translateY(-1px); }
.btn-outline {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255,255,255,0.6);
}
.btn-outline:hover { border-color: #fff; background: rgba(255,255,255,0.08); }
.btn-white {
  background: #fff;
  color: var(--yellow-600);
}
.btn-white:hover { background: var(--yellow-50); }
.btn-sm { padding: 10px 24px; font-size: 14px; }
.btn-full { width: 100%; }

/* === 导航栏 === */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-h);
  z-index: 1000;
  background: rgba(18, 14, 6, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.07);
  transition: all var(--transition);
}
.header.scrolled {
  background: rgba(18, 14, 6, 0.98);
  box-shadow: 0 2px 20px rgba(0,0,0,0.3);
}
.header .container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}
.logo-mark {
  width: 44px;
  height: 44px;
  background: var(--yellow-500);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 13px;
  border-radius: var(--radius-md);
  letter-spacing: 0.05em;
  flex-shrink: 0;
}
.logo-mark-sm {
  width: 32px;
  height: 32px;
  font-size: 10px;
}
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-name { font-size: 18px; font-weight: 700; color: #fff; }
.brand-sub { font-size: 11px; color: rgba(255,255,255,0.55); letter-spacing: 0.05em; }
.nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-link {
  font-size: 15px;
  color: rgba(255,255,255,0.75);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  position: relative;
}
.nav-link:hover { color: #fff; background: rgba(255,255,255,0.08); }
.nav-link.active { color: #fff; }
.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--yellow-300);
  border-radius: 2px;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: rgba(255,255,255,0.8);
  border-radius: 2px;
  transition: all var(--transition);
}

/* === Hero 区域 === */
.hero {
  min-height: 100vh;
  position: relative;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--yellow-900) 0%, var(--yellow-700) 50%, #1e1808 100%);
}
.hero-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 50%, rgba(184, 138, 26, 0.4) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(74, 56, 8, 0.3) 0%, transparent 40%);
}
.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    0deg, transparent, transparent 60px,
    rgba(255,255,255,0.015) 60px, rgba(255,255,255,0.015) 61px
  ),
  repeating-linear-gradient(
    90deg, transparent, transparent 80px,
    rgba(255,255,255,0.015) 80px, rgba(255,255,255,0.015) 81px
  );
}
.hero-content {
  position: relative;
  z-index: 2;
  padding-top: var(--nav-h);
  max-width: 720px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--yellow-300);
  background: rgba(184, 138, 26, 0.15);
  border: 1px solid rgba(184, 138, 26, 0.3);
  padding: 6px 16px;
  border-radius: 20px;
  margin-bottom: 24px;
  letter-spacing: 0.08em;
}
.hero-title {
  font-size: clamp(38px, 6vw, 64px);
  font-weight: 800;
  line-height: 1.15;
  color: #fff;
  margin-bottom: 24px;
  letter-spacing: -0.01em;
}
.hero-desc {
  font-size: 17px;
  color: rgba(255,255,255,0.7);
  line-height: 1.8;
  margin-bottom: 40px;
  max-width: 560px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.4);
  font-size: 11px;
  letter-spacing: 0.1em;
  z-index: 2;
  animation: scrollBounce 2s infinite;
}
.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, rgba(255,255,255,0.4), transparent);
}
@keyframes scrollBounce {
  0%, 100% { opacity: 0.4; transform: translateX(-50%) translateY(0); }
  50% { opacity: 0.7; transform: translateX(-50%) translateY(6px); }
}

/* === 统计数字 === */
.stats-section {
  background: var(--yellow-800);
  padding: 40px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}
.stat-item {
  text-align: center;
  padding: 24px 20px;
  border-right: 1px solid rgba(255,255,255,0.1);
}
.stat-item:last-child { border-right: none; }
.stat-number {
  font-size: 40px;
  font-weight: 800;
  color: #fff;
  line-height: 1;
  margin-bottom: 8px;
}
.stat-number span {
  font-size: 22px;
  color: var(--yellow-300);
}
.stat-label {
  font-size: 14px;
  color: rgba(255,255,255,0.55);
}

/* === 优势卡片 === */
.advantage-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.advantage-card {
  background: #fff;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all var(--transition);
}
.advantage-card:hover {
  border-color: var(--yellow-300);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.advantage-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: var(--yellow-50);
  margin-bottom: 20px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
.advantage-icon::before, .advantage-icon::after { content: ''; position: absolute; }

/* 数据库图标 */
.icon-db::before {
  width: 22px; height: 6px;
  border: 2px solid var(--yellow-500);
  border-radius: 3px;
  top: 12px;
}
.icon-db::after {
  width: 22px; height: 16px;
  border: 2px solid var(--yellow-500);
  border-top: none;
  border-radius: 0 0 3px 3px;
  top: 18px;
}

/* 图片图标 */
.icon-img::before {
  width: 24px; height: 18px;
  border: 2px solid var(--yellow-500);
  border-radius: 2px;
  top: 17px;
}
.icon-img::after {
  width: 8px; height: 8px;
  border: 2px solid var(--yellow-500);
  border-radius: 50%;
  top: 13px; left: 14px;
}

/* 报价图标 */
.icon-rq::before {
  width: 20px; height: 24px;
  border: 2px solid var(--yellow-500);
  border-radius: 2px;
  top: 14px;
}
.icon-rq::after {
  width: 10px; height: 2px;
  background: var(--yellow-500);
  top: 24px; left: 21px;
  box-shadow: 0 4px 0 var(--yellow-500), 0 8px 0 var(--yellow-500);
}

/* 实验室图标 */
.icon-lab::before {
  width: 10px; height: 22px;
  border: 2px solid var(--yellow-500);
  border-radius: 0 0 5px 5px;
  top: 14px; left: 21px;
}
.icon-lab::after {
  width: 16px; height: 2px;
  background: var(--yellow-500);
  top: 14px; left: 18px;
}

/* 客人图标 */
.icon-client::before {
  width: 16px; height: 16px;
  border: 2px solid var(--yellow-500);
  border-radius: 50%;
  top: 10px; left: 18px;
}
.icon-client::after {
  width: 22px; height: 10px;
  border: 2px solid var(--yellow-500);
  border-radius: 10px 10px 0 0;
  border-bottom: none;
  top: 28px; left: 15px;
}

/* 桥梁图标 */
.icon-bridge::before {
  width: 28px; height: 2px;
  background: var(--yellow-500);
  top: 26px; left: 12px;
  box-shadow: 0 -8px 0 var(--yellow-500);
}
.icon-bridge::after {
  width: 2px; height: 12px;
  background: var(--yellow-500);
  top: 18px; left: 25px;
  box-shadow: 10px 0 0 var(--yellow-500);
}

.advantage-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 10px;
}
.advantage-card p {
  font-size: 14px;
  color: var(--gray-500);
  line-height: 1.7;
}

/* === 流程步骤 === */
.process-flow {
  display: flex;
  align-items: flex-start;
  gap: 0;
  overflow-x: auto;
  padding-bottom: 8px;
}
.process-step {
  flex: 1;
  min-width: 160px;
  text-align: center;
  padding: 32px 20px;
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-300);
  transition: all var(--transition);
}
.process-step:hover {
  border-color: var(--yellow-400);
  box-shadow: var(--shadow-sm);
}
.step-num {
  font-size: 36px;
  font-weight: 800;
  color: var(--yellow-100);
  line-height: 1;
  margin-bottom: 12px;
}
.step-content h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 8px;
}
.step-content p {
  font-size: 13px;
  color: var(--gray-500);
  line-height: 1.6;
}
.process-arrow {
  flex-shrink: 0;
  width: 32px;
  height: 2px;
  background: var(--gray-300);
  margin-top: 60px;
  position: relative;
}
.process-arrow::after {
  content: '';
  position: absolute;
  right: -6px;
  top: -4px;
  width: 0;
  height: 0;
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
  border-left: 8px solid var(--gray-300);
}

/* === 行业标签 === */
.industry-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}
.industry-item {
  background: var(--yellow-50);
  border: 1px solid var(--yellow-100);
  color: var(--yellow-600);
  padding: 12px 28px;
  border-radius: 30px;
  font-size: 15px;
  font-weight: 500;
  transition: all var(--transition);
}
.industry-item:hover {
  background: var(--yellow-500);
  color: #fff;
  border-color: var(--yellow-500);
  transform: translateY(-2px);
}

/* === CTA === */
.cta-section {
  background: var(--yellow-600);
  padding: 80px 0;
}
.cta-content {
  text-align: center;
}
.cta-content h2 {
  font-size: 36px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}
.cta-content p {
  font-size: 17px;
  color: rgba(255,255,255,0.75);
  margin-bottom: 32px;
}

/* === 页脚 === */
.footer {
  background: var(--yellow-900);
  padding: 60px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  color: #fff;
  font-size: 16px;
  font-weight: 600;
}
.footer-brand p {
  font-size: 14px;
  color: rgba(255,255,255,0.45);
  line-height: 1.7;
}
.footer-links h5, .footer-contact h5 {
  font-size: 13px;
  font-weight: 600;
  color: rgba(255,255,255,0.8);
  letter-spacing: 0.05em;
  margin-bottom: 16px;
  text-transform: uppercase;
}
.footer-links ul li {
  margin-bottom: 10px;
}
.footer-links ul li a {
  font-size: 14px;
  color: rgba(255,255,255,0.45);
  transition: color var(--transition);
}
.footer-links ul li a:hover { color: rgba(255,255,255,0.85); }
.footer-contact p {
  font-size: 14px;
  color: rgba(255,255,255,0.45);
  margin-bottom: 8px;
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
}
.footer-bottom p {
  font-size: 13px;
  color: rgba(255,255,255,0.3);
}
.footer-bottom a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}
.footer-bottom a:hover,
.footer-bottom a:focus-visible {
  color: rgba(255,255,255,0.75);
  text-decoration: none;
}

/* === 页面 Hero（内页） === */
.page-hero {
  background: linear-gradient(135deg, var(--yellow-900) 0%, var(--yellow-700) 100%);
  padding: calc(var(--nav-h) + 60px) 0 80px;
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 70% 50%, rgba(184,138,26,0.4) 0%, transparent 60%);
}
.page-hero-content {
  position: relative;
  z-index: 2;
  max-width: 640px;
}
.page-hero-content h1 {
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 16px;
}
.page-hero-content p {
  font-size: 17px;
  color: rgba(255,255,255,0.7);
  line-height: 1.7;
}

/* === 关于我们页面 === */
.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.about-intro-text .section-tag { margin-bottom: 12px; }
.about-intro-text h2 {
  font-size: clamp(26px, 3.5vw, 36px);
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 20px;
  line-height: 1.3;
}
.about-intro-text p {
  font-size: 15px;
  color: var(--gray-500);
  line-height: 1.8;
  margin-bottom: 16px;
}
.about-values {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}
.value-tag {
  background: var(--yellow-50);
  color: var(--yellow-600);
  border: 1px solid var(--yellow-100);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
}
.about-intro-visual {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.visual-card {
  background: var(--gray-50);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  transition: all var(--transition);
}
.visual-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-sm); }
.visual-card-accent {
  background: var(--yellow-50);
  border-color: var(--yellow-100);
}
.visual-card-dark {
  background: var(--yellow-800);
  border-color: var(--yellow-700);
}
.visual-card-dark .vc-num { color: #fff; }
.visual-card-dark .vc-label { color: rgba(255,255,255,0.6); }
.vc-num {
  font-size: 36px;
  font-weight: 800;
  color: var(--yellow-600);
  line-height: 1;
  margin-bottom: 8px;
}
.vc-label {
  font-size: 13px;
  color: var(--gray-500);
}

/* 使命卡片 */
.mission-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.mission-card {
  background: #fff;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  text-align: center;
  transition: all var(--transition);
}
.mission-card:hover {
  border-color: var(--yellow-300);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.mission-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  margin: 0 auto 20px;
  position: relative;
}
.mission-icon-1 { background: #fff8e0; }
.mission-icon-2 { background: #e8f5e9; }
.mission-icon-3 { background: #fff3e0; }
.mission-icon::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 2px solid currentColor;
  opacity: 0.3;
}
.mission-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 12px;
}
.mission-card p {
  font-size: 14px;
  color: var(--gray-500);
  line-height: 1.7;
}

/* 团队特色 */
.team-features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.team-feature {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  padding: 28px;
  background: #fff;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
}
.team-feature:hover {
  border-color: var(--yellow-300);
  box-shadow: var(--shadow-sm);
}
.tf-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  flex-shrink: 0;
}
.tf-icon-1 { background: var(--yellow-50); }
.tf-icon-2 { background: #e8f5e9; }
.tf-icon-3 { background: #fff3e0; }
.tf-icon-4 { background: #fce4ec; }
.tf-content h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 8px;
}
.tf-content p {
  font-size: 14px;
  color: var(--gray-500);
  line-height: 1.7;
}

/* 时间轴 */
.timeline {
  position: relative;
  max-width: 720px;
  margin: 0 auto;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 80px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--gray-300);
}
.timeline-item {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  padding: 24px 0;
  position: relative;
}
.timeline-year {
  width: 64px;
  flex-shrink: 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--yellow-600);
  text-align: right;
  padding-top: 4px;
}
.timeline-dot {
  position: relative;
  flex-shrink: 0;
  margin-top: 8px;
}
.timeline-dot::before {
  content: '';
  display: block;
  width: 16px;
  height: 16px;
  background: var(--yellow-500);
  border-radius: 50%;
  border: 3px solid #fff;
  box-shadow: 0 0 0 2px var(--yellow-300);
}
.timeline-content {
  flex: 1;
  background: #fff;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-md);
  padding: 16px 20px;
}
.timeline-content h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 6px;
}
.timeline-content p {
  font-size: 14px;
  color: var(--gray-500);
  line-height: 1.6;
}

/* === 服务详情页 === */
.service-overview {
  text-align: center;
  max-width: 760px;
  margin: 0 auto;
  padding: 0 0 20px;
  border-bottom: 1px solid var(--gray-300);
}
.service-overview-text {
  font-size: 17px;
  color: var(--gray-700);
  line-height: 1.8;
}
.service-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.service-detail-reverse { direction: rtl; }
.service-detail-reverse > * { direction: ltr; }
.service-number {
  font-size: 60px;
  font-weight: 900;
  color: var(--gray-100);
  line-height: 1;
  margin-bottom: -8px;
}
.service-detail-content h2 {
  font-size: clamp(24px, 3.5vw, 34px);
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 16px;
  line-height: 1.3;
}
.service-lead {
  font-size: 16px;
  color: var(--yellow-600);
  font-weight: 500;
  line-height: 1.7;
  margin-bottom: 16px;
}
.service-detail-content > p:not(.service-lead) {
  font-size: 15px;
  color: var(--gray-500);
  line-height: 1.8;
  margin-bottom: 20px;
}
.service-features {
  margin-bottom: 28px;
}
.service-features li {
  font-size: 14px;
  color: var(--gray-700);
  padding: 8px 0 8px 24px;
  border-bottom: 1px solid var(--gray-100);
  position: relative;
}
.service-features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 14px;
  width: 10px;
  height: 10px;
  border: 2px solid var(--yellow-400);
  border-radius: 50%;
}
.service-visual {
  background: var(--yellow-50);
  border: 1px solid var(--yellow-100);
  border-radius: var(--radius-xl);
  padding: 48px 32px;
  text-align: center;
  min-height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.sv-inner { display: flex; flex-direction: column; align-items: center; gap: 16px; }
.sv-icon-large {
  width: 80px;
  height: 80px;
  background: var(--yellow-500);
  border-radius: var(--radius-lg);
  position: relative;
}
.sv-img-icon { background: #2e7d32; }
.sv-client-icon { background: #6a1b9a; }
.sv-rq-icon { background: #e65100; }
.sv-lab-icon { background: #b88a1a; }
.sv-label {
  font-size: 18px;
  font-weight: 700;
  color: var(--yellow-800);
}
.sv-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
}
.sv-tags span {
  background: #fff;
  border: 1px solid var(--yellow-100);
  color: var(--yellow-600);
  padding: 4px 14px;
  border-radius: 16px;
  font-size: 13px;
}

/* 服务价值 */
.value-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.value-box {
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-lg);
  padding: 28px 20px;
  text-align: center;
  transition: all var(--transition);
}
.value-box:hover {
  background: rgba(255,255,255,0.12);
  transform: translateY(-3px);
}
.vb-num {
  font-size: 18px;
  font-weight: 700;
  color: var(--yellow-300);
  margin-bottom: 10px;
}
.value-box p {
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  line-height: 1.6;
}

/* === 联系我们页面 === */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 64px;
  align-items: flex-start;
}
.contact-info .section-tag { margin-bottom: 12px; }
.contact-info h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 16px;
  line-height: 1.3;
}
.contact-intro {
  font-size: 15px;
  color: var(--gray-500);
  line-height: 1.8;
  margin-bottom: 32px;
}
.contact-items { display: flex; flex-direction: column; gap: 20px; margin-bottom: 28px; }
.contact-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.ci-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--yellow-50);
  border: 1px solid var(--yellow-100);
  flex-shrink: 0;
  position: relative;
}
.ci-label {
  font-size: 12px;
  color: var(--gray-500);
  margin-bottom: 2px;
}
.ci-value {
  font-size: 15px;
  font-weight: 600;
  color: var(--gray-900);
}
.contact-tip {
  display: flex;
  gap: 12px;
  align-items: center;
  background: var(--yellow-50);
  border: 1px solid var(--yellow-100);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  font-size: 14px;
  color: var(--yellow-700);
}
.ct-icon {
  width: 20px;
  height: 20px;
  background: var(--yellow-500);
  border-radius: 50%;
  flex-shrink: 0;
}

/* 联系表单 */
.contact-form-card {
  background: #fff;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-xl);
  padding: 40px;
  box-shadow: var(--shadow-md);
}
.contact-form-card h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 6px;
}
.form-desc {
  font-size: 14px;
  color: var(--gray-500);
  margin-bottom: 28px;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.form-group {
  display: flex;
  flex-direction: column;
  margin-bottom: 20px;
}
.form-group label {
  font-size: 14px;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 6px;
}
.required { color: #e53e3e; }
.form-group input,
.form-group select,
.form-group textarea {
  padding: 12px 14px;
  border: 1.5px solid var(--gray-300);
  border-radius: var(--radius-md);
  font-size: 14px;
  color: var(--gray-900);
  font-family: inherit;
  transition: border-color var(--transition);
  background: #fff;
  outline: none;
  width: 100%;
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--gray-300); }
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { border-color: var(--yellow-400); }
.form-group input.error,
.form-group select.error,
.form-group textarea.error { border-color: #e53e3e; }
.form-group textarea { resize: vertical; min-height: 120px; }
.form-error {
  font-size: 12px;
  color: #e53e3e;
  margin-top: 4px;
  display: none;
}
.form-error.show { display: block; }
.form-success {
  display: none;
  align-items: center;
  gap: 12px;
  background: #f0fff4;
  border: 1px solid #68d391;
  border-radius: var(--radius-md);
  padding: 16px 20px;
  font-size: 14px;
  color: #276749;
  margin-top: 16px;
}
.form-success.show { display: flex; }
.success-icon {
  width: 24px;
  height: 24px;
  background: #38a169;
  border-radius: 50%;
  flex-shrink: 0;
}

/* FAQ */
.faq-list {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-item {
  background: #fff;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition);
}
.faq-item[data-open="true"] { border-color: var(--yellow-300); }
.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  cursor: pointer;
  user-select: none;
}
.faq-question span {
  font-size: 15px;
  font-weight: 600;
  color: var(--gray-900);
}
.faq-arrow {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--gray-100);
  flex-shrink: 0;
  position: relative;
  transition: all var(--transition);
}
.faq-arrow::before, .faq-arrow::after {
  content: '';
  position: absolute;
  width: 8px;
  height: 1.5px;
  background: var(--gray-500);
  top: 50%;
  left: 50%;
  transition: all var(--transition);
}
.faq-arrow::before { transform: translate(-50%, -50%) rotate(45deg) translateX(-3px); }
.faq-arrow::after  { transform: translate(-50%, -50%) rotate(-45deg) translateX(3px); }
.faq-item[data-open="true"] .faq-arrow {
  background: var(--yellow-50);
}
.faq-item[data-open="true"] .faq-arrow::before { transform: translate(-50%, -50%) rotate(-45deg) translateX(-3px); }
.faq-item[data-open="true"] .faq-arrow::after  { transform: translate(-50%, -50%) rotate(45deg) translateX(3px); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 24px;
}
.faq-item[data-open="true"] .faq-answer {
  max-height: 200px;
  padding: 0 24px 20px;
}
.faq-answer p {
  font-size: 14px;
  color: var(--gray-500);
  line-height: 1.8;
}

/* 信任板块 */
.trust-section {
  text-align: center;
  padding: 24px 0;
}
.trust-section h3 {
  font-size: 24px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 10px;
}
.trust-section > p {
  font-size: 15px;
  color: var(--gray-500);
  margin-bottom: 32px;
}
.trust-badges {
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
}
.trust-badge {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--gray-50);
  border: 1px solid var(--gray-300);
  padding: 14px 24px;
  border-radius: 30px;
  font-size: 14px;
  font-weight: 600;
  color: var(--gray-700);
}
.tb-icon {
  width: 20px;
  height: 20px;
  border-radius: 50%;
}
.tb-check { background: #38a169; }
.tb-cert  { background: var(--yellow-500); }
.tb-shield{ background: #6b46c1; }
.tb-star  { background: var(--gold); }

/* === 响应式 === */
@media (max-width: 1024px) {
  .advantage-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-item:nth-child(2) { border-right: none; }
}

@media (max-width: 768px) {
  .nav { display: none; }
  .nav.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    background: rgba(18, 14, 6, 0.98);
    padding: 16px;
    gap: 4px;
    z-index: 999;
    border-top: 1px solid rgba(255,255,255,0.08);
  }
  .nav.open .nav-link {
    padding: 12px 16px;
    border-radius: var(--radius-md);
  }
  .nav-toggle { display: flex; }

  .hero-title { font-size: 36px; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; text-align: center; }

  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .advantage-grid { grid-template-columns: 1fr; }
  .process-flow { flex-direction: column; gap: 12px; }
  .process-arrow { width: 2px; height: 20px; margin: 0 auto; }
  .process-arrow::after {
    right: -4px;
    top: auto;
    bottom: -6px;
    border-top: 8px solid var(--gray-300);
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-bottom: none;
  }

  .about-intro { grid-template-columns: 1fr; gap: 40px; }
  .about-intro-visual { grid-template-columns: repeat(2, 1fr); }
  .mission-grid { grid-template-columns: 1fr; }
  .team-features { grid-template-columns: 1fr; }
  .timeline::before { left: 70px; }

  .service-detail { grid-template-columns: 1fr; gap: 40px; }
  .service-detail-reverse { direction: ltr; }
  .value-grid { grid-template-columns: repeat(2, 1fr); }

  .contact-layout { grid-template-columns: 1fr; gap: 40px; }
  .form-row { grid-template-columns: 1fr; }

  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
  .section { padding: 56px 0; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .hero-content { padding-top: calc(var(--nav-h) + 16px); }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .contact-form-card { padding: 24px 20px; }
  .value-grid { grid-template-columns: 1fr 1fr; }
}