/* ========================================
   北京卓立世林企业管理有限公司 - 官网样式
   设计理念：简约大气、专业信赖
   ======================================== */

/* ===== CSS 变量 ===== */
:root {
  /* 主色调 - 深邃藏蓝，传递专业与信赖 */
  --color-primary: #0d2847;
  --color-primary-light: #1a3a5c;
  --color-primary-lighter: #2a4d72;
  --color-primary-dark: #061a30;

  /* 辅助色 - 金色，体现品质与价值 */
  --color-accent: #c8a45c;
  --color-accent-light: #d9b876;
  --color-accent-dark: #b08d45;

  /* 中性色 */
  --color-bg: #ffffff;
  --color-bg-alt: #f7f8fb;
  --color-bg-dark: #0a1f38;
  --color-text: #1a202c;
  --color-text-light: #5a6573;
  --color-text-lighter: #8896a6;
  --color-border: #e4e8ef;
  --color-white: #ffffff;

  /* 阴影 */
  --shadow-sm: 0 1px 3px rgba(13, 40, 71, 0.06);
  --shadow-md: 0 4px 16px rgba(13, 40, 71, 0.08);
  --shadow-lg: 0 8px 32px rgba(13, 40, 71, 0.12);
  --shadow-xl: 0 16px 48px rgba(13, 40, 71, 0.16);

  /* 圆角 */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  /* 过渡 */
  --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);

  /* 布局 */
  --container-width: 1200px;
  --nav-height: 96px;
}

/* ===== 基础重置 ===== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

ul, ol {
  list-style: none;
}

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

button {
  border: none;
  outline: none;
  cursor: pointer;
  font-family: inherit;
}

input, textarea, select {
  font-family: inherit;
  outline: none;
}

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

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 36px;
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  cursor: pointer;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-white);
}

.btn-primary:hover {
  background: var(--color-accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(200, 164, 92, 0.35);
}

.btn-outline {
  background: transparent;
  color: var(--color-white);
  border: 1.5px solid rgba(255, 255, 255, 0.5);
}

.btn-outline:hover {
  border-color: var(--color-white);
  background: rgba(255, 255, 255, 0.1);
}

.btn-dark {
  background: var(--color-primary);
  color: var(--color-white);
}

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

/* ===== 导航栏 ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  z-index: 1000;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, #061a30 0%, #0d2847 50%, #1a3a5c 100%);
  transition: var(--transition);
}

.navbar.scrolled {
  background: rgba(6, 26, 48, 0.98);
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(10px);
}

.navbar .container {
  max-width: none;
  width: 100%;
  margin: 0;
  padding: 0 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Logo */
.nav-logo {
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav-logo .logo-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent);
  border-radius: var(--radius-sm);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: -1px;
}

.nav-logo .logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}

.nav-logo .logo-text .name {
  font-size: 1.37rem;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: 1px;
  white-space: nowrap;
  text-align: left;
}


.navbar.scrolled .nav-logo .logo-text .name {
  color: var(--color-white);
}

.nav-logo .logo-text .sub {
  font-size: 0.7rem;
  color: rgba(255, 255, 255, 0.6);
  letter-spacing: 1px;
  text-transform: uppercase;
}

.navbar.scrolled .nav-logo .logo-text .sub {
  color: var(--color-text-lighter);
}

/* 导航菜单 */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 52px;
  margin-left: auto;
}

.nav-menu a {
  font-size: 1.02rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.85);
  position: relative;
  padding: 8px 0;
}

.navbar.scrolled .nav-menu a {
  color: rgba(255, 255, 255, 0.85);
}

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

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

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

.navbar.scrolled .nav-menu a:hover,
.navbar.scrolled .nav-menu a.active {
  color: var(--color-accent);
}

/* 移动端菜单按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  padding: 8px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-white);
  transition: var(--transition);
  border-radius: 2px;
}

.navbar.scrolled .nav-toggle span {
  background: var(--color-white);
}

/* ===== Hero 区域 ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, #061a30 0%, #0d2847 40%, #1a3a5c 100%);
  overflow: hidden;
}

/* Hero 装饰图案 */
.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image:
    radial-gradient(circle at 20% 80%, rgba(200, 164, 92, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(42, 77, 114, 0.4) 0%, transparent 50%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='60' viewBox='0 0 60 60'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.02'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  color: var(--color-white);
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
  padding: 120px 0 80px;
}

.hero-tagline {
  display: inline-block;
  padding: 8px 24px;
  background: rgba(200, 164, 92, 0.12);
  border: 1px solid rgba(200, 164, 92, 0.25);
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  color: var(--color-accent-light);
  margin-bottom: 48px;
  letter-spacing: 2px;
  text-transform: uppercase;
}

.hero h1 {
  font-size: 3.6rem;
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 36px;
  letter-spacing: 2px;
}

.hero h1 .highlight {
  color: var(--color-accent);
}

.hero-desc {
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.7);
  line-height: 2;
  margin-bottom: 52px;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  justify-content: center;
}

.hero-actions .btn {
  min-width: 160px;
  padding: 14px 36px;
  font-size: 1.05rem;
}

/* Hero 滚动提示 */
.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.8rem;
  letter-spacing: 2px;
  animation: bounce 2s infinite;
}

.hero-scroll .line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, transparent, rgba(255, 255, 255, 0.3));
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(10px); }
}

/* ===== 页面 Banner ===== */
.page-banner {
  position: relative;
  padding: 140px 0 80px;
  background: linear-gradient(135deg, #061a30 0%, #0d2847 50%, #1a3a5c 100%);
  text-align: center;
  overflow: hidden;
}

.page-banner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image:
    radial-gradient(circle at 30% 50%, rgba(200, 164, 92, 0.06) 0%, transparent 60%);
  pointer-events: none;
}

.page-banner h1 {
  position: relative;
  font-size: 2.6rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 16px;
  letter-spacing: 2px;
}

.page-banner .breadcrumb {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.55);
}

.page-banner .breadcrumb a:hover {
  color: var(--color-accent-light);
}

.page-banner .breadcrumb .separator {
  color: rgba(255, 255, 255, 0.3);
}

.section-first {
  padding-top: calc(var(--nav-height) + 60px);
}

/* ===== 通用 Section ===== */
.section {
  padding: 100px 0;
}

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

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-header .label {
  display: inline-block;
  font-size: 0.85rem;
  color: var(--color-accent);
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 16px;
  font-weight: 600;
}

.section-header h2 {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 16px;
  letter-spacing: 1px;
}

.section-header p {
  font-size: 1.05rem;
  color: var(--color-text-light);
  max-width: 600px;
  margin: 0 auto;
}

/* 标题装饰线 */
.section-header h2::after {
  content: '';
  display: block;
  width: 48px;
  height: 3px;
  background: var(--color-accent);
  margin: 20px auto 0;
  border-radius: 2px;
}

/* ===== 卡片网格 ===== */
.grid {
  display: grid;
  gap: 32px;
}

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

/* ===== 服务卡片 ===== */
.service-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  transition: var(--transition);
  border: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition);
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: transparent;
}

.service-card:hover::before {
  transform: scaleX(1);
}

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

.service-card:hover .icon {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
}

.service-card .icon svg {
  width: 28px;
  height: 28px;
  color: var(--color-white);
}

.service-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.service-card p {
  font-size: 0.95rem;
  color: var(--color-text-light);
  line-height: 1.8;
}

/* ===== 关于简介区域 ===== */
.about-brief {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-brief .text-content h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.about-brief .text-content .sub-label {
  font-size: 0.85rem;
  color: var(--color-accent);
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 12px;
  font-weight: 600;
}

.about-brief .text-content p {
  color: var(--color-text-light);
  margin-bottom: 16px;
  line-height: 1.9;
}

.about-brief .stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 32px;
}

.about-brief .stat-item .number {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
}

.about-brief .stat-item .label {
  font-size: 0.85rem;
  color: var(--color-text-light);
  margin-top: 6px;
}

/* 关于简介视觉区域 */
.about-visual {
  position: relative;
}

.about-visual .visual-card {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  border-radius: var(--radius-lg);
  padding: 48px;
  color: var(--color-white);
  position: relative;
  overflow: hidden;
}

.about-visual .visual-card::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -30%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(200, 164, 92, 0.15), transparent 70%);
  border-radius: 50%;
}

.about-visual .visual-card .quote-mark {
  font-size: 4rem;
  color: var(--color-accent);
  opacity: 0.4;
  line-height: 1;
  margin-bottom: 16px;
}

.about-visual .visual-card .quote-text {
  font-size: 1.2rem;
  line-height: 1.8;
  margin-bottom: 24px;
  position: relative;
}

.about-visual .visual-card .quote-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.about-visual .visual-card .quote-author .line {
  width: 32px;
  height: 2px;
  background: var(--color-accent);
}

.about-visual .visual-card .quote-author span {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.7);
}

/* ===== 为什么选择我们 ===== */
.feature-item {
  display: flex;
  gap: 20px;
  padding: 32px;
  border-radius: var(--radius-lg);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  transition: var(--transition);
}

.feature-item:hover {
  box-shadow: var(--shadow-lg);
  border-color: transparent;
  transform: translateY(-4px);
}

.feature-item .feature-icon {
  flex-shrink: 0;
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: rgba(200, 164, 92, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-item .feature-icon svg {
  width: 26px;
  height: 26px;
  color: var(--color-accent);
}

.feature-item h4 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.feature-item p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* ===== 数据统计区域 ===== */
.stats-section {
  background: linear-gradient(135deg, #061a30 0%, #0d2847 100%);
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}

.stats-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='40' height='40' viewBox='0 0 40 40'%3E%3Cg fill='%23ffffff' fill-opacity='0.015'%3E%3Cpath d='M0 0h20v20H0V0zm20 20h20v20H20V20z'/%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
}

.stats-grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}

.stats-grid .stat-item .number {
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
}

.stats-grid .stat-item .number .unit {
  font-size: 1.4rem;
}

.stats-grid .stat-item .label {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.65);
  margin-top: 12px;
  letter-spacing: 1px;
}

/* ===== CTA 区域 ===== */
.cta-section {
  position: relative;
  padding: 80px 0;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  text-align: center;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(200, 164, 92, 0.12), transparent 70%);
  border-radius: 50%;
}

.cta-section h2 {
  position: relative;
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 16px;
}

.cta-section p {
  position: relative;
  font-size: 1.05rem;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 32px;
}

.cta-section .btn {
  position: relative;
}

/* ===== 页脚 ===== */
.footer {
  background: var(--color-bg-dark);
  color: rgba(255, 255, 255, 0.6);
  padding: 72px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand .nav-logo {
  margin-bottom: 20px;
}

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.8;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 20px;
}

.footer-col ul li {
  margin-bottom: 12px;
}

.footer-col ul li a {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.55);
}

.footer-col ul li a:hover {
  color: var(--color-accent);
}

.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.55);
  margin-bottom: 14px;
  line-height: 1.7;
}

.footer-contact svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  margin-top: 3px;
  color: var(--color-accent);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.5);
}

.footer-bottom a:hover {
  color: var(--color-accent);
}

/* ===== 关于我们页面专用 ===== */
.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-intro .intro-text h2 {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 20px;
}

.about-intro .intro-text p {
  color: var(--color-text-light);
  margin-bottom: 16px;
  line-height: 1.9;
}

.about-intro .intro-text .highlight-box {
  background: var(--color-bg-alt);
  border-left: 3px solid var(--color-accent);
  padding: 20px 24px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 24px 0;
}

.about-intro .intro-text .highlight-box p {
  margin: 0;
  color: var(--color-text);
  font-size: 0.95rem;
}

.about-intro .intro-visual {
  position: relative;
}

.about-intro .intro-visual .img-placeholder {
  width: 100%;
  aspect-ratio: 4 / 3;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.about-intro .intro-visual .img-placeholder::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image:
    radial-gradient(circle at 70% 30%, rgba(200, 164, 92, 0.15), transparent 50%),
    radial-gradient(circle at 30% 70%, rgba(42, 77, 114, 0.3), transparent 50%);
}

.about-intro .intro-visual .img-placeholder .content {
  position: relative;
  text-align: center;
  color: var(--color-white);
  padding: 40px;
}

.about-intro .intro-visual .img-placeholder .content .big-text {
  font-size: 4rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.about-intro .intro-visual .img-placeholder .content .desc {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.7);
}

/* 浮动信息卡片 */
.about-intro .intro-visual .float-card {
  position: absolute;
  bottom: -24px;
  right: -24px;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  box-shadow: var(--shadow-xl);
  display: flex;
  align-items: center;
  gap: 16px;
}

.about-intro .intro-visual .float-card .icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(200, 164, 92, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.about-intro .intro-visual .float-card .icon svg {
  width: 24px;
  height: 24px;
  color: var(--color-accent);
}

.about-intro .intro-visual .float-card .info .title {
  font-size: 0.8rem;
  color: var(--color-text-lighter);
}

.about-intro .intro-visual .float-card .info .value {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-primary);
}

/* ===== 时间线 ===== */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding: 20px 0;
}

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

.timeline-item {
  position: relative;
  width: 50%;
  padding: 0 40px 48px;
}

.timeline-item:nth-child(odd) {
  left: 0;
  text-align: right;
}

.timeline-item:nth-child(even) {
  left: 50%;
}

.timeline-item .dot {
  position: absolute;
  top: 8px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 3px solid var(--color-bg);
  box-shadow: 0 0 0 3px rgba(200, 164, 92, 0.2);
}

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

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

.timeline-item .content {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  transition: var(--transition);
}

.timeline-item .content:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent);
}

.timeline-item .content .date {
  font-size: 0.85rem;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 8px;
}

.timeline-item .content h4 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.timeline-item .content p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* ===== 核心价值观 ===== */
.values-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.value-card {
  text-align: center;
  padding: 40px 24px;
  border-radius: var(--radius-lg);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  transition: var(--transition);
}

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

.value-card .icon-circle {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  transition: var(--transition);
}

.value-card:hover .icon-circle {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
}

.value-card .icon-circle svg {
  width: 30px;
  height: 30px;
  color: var(--color-white);
}

.value-card h4 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.value-card p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* ===== 服务详情（交替布局）===== */
.service-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  margin-bottom: 80px;
}

.service-detail:last-child {
  margin-bottom: 0;
}

.service-detail:nth-child(even) .service-detail-text {
  order: 2;
}

.service-detail-text .service-number {
  font-size: 3.5rem;
  font-weight: 700;
  color: var(--color-bg-alt);
  line-height: 1;
  margin-bottom: 16px;
  -webkit-text-stroke: 2px var(--color-border);
}

.service-detail-text .label {
  font-size: 0.85rem;
  color: var(--color-accent);
  letter-spacing: 2px;
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: 8px;
}

.service-detail-text h3 {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.service-detail-text > p {
  color: var(--color-text-light);
  line-height: 1.9;
  margin-bottom: 24px;
}

.service-detail-text ul {
  margin-bottom: 24px;
}

.service-detail-text ul li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 12px;
  color: var(--color-text-light);
  font-size: 0.95rem;
}

.service-detail-text ul li::before {
  content: '';
  flex-shrink: 0;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  margin-top: 10px;
}

.service-detail-visual {
  position: relative;
}

.service-detail-visual .visual-box {
  width: 100%;
  aspect-ratio: 5 / 4;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.service-detail-visual .visual-box svg {
  width: 60%;
  height: 60%;
  opacity: 0.9;
}

/* 服务流程 */
.process-flow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}

.process-step {
  text-align: center;
  position: relative;
}

.process-step .step-number {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--color-white);
  border: 2px solid var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-accent);
  margin: 0 auto 16px;
  transition: var(--transition);
  position: relative;
  z-index: 2;
}

.process-step:hover .step-number {
  background: var(--color-accent);
  color: var(--color-white);
  transform: scale(1.1);
}

.process-step h4 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.process-step p {
  font-size: 0.85rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

.process-step:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 28px;
  left: 60%;
  width: 80%;
  height: 2px;
  background: var(--color-border);
  z-index: 1;
}

/* ===== 联系我们页面 ===== */
.contact-info-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-bottom: 64px;
}

.contact-info-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  text-align: center;
  transition: var(--transition);
}

.contact-info-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: transparent;
  transform: translateY(-4px);
}

.contact-info-card .icon-circle {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: rgba(200, 164, 92, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}

.contact-info-card .icon-circle svg {
  width: 28px;
  height: 28px;
  color: var(--color-accent);
}

.contact-info-card h4 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.contact-info-card p {
  color: var(--color-text-light);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* 联系表单区域 */
.contact-form-section {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 64px;
  align-items: start;
}

.contact-form-info h2 {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.contact-form-info .sub-label {
  font-size: 0.85rem;
  color: var(--color-accent);
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 12px;
  font-weight: 600;
}

.contact-form-info p {
  color: var(--color-text-light);
  line-height: 1.9;
  margin-bottom: 24px;
}

.contact-form-info .info-list {
  margin-top: 32px;
}

.contact-form-info .info-list li {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 20px;
}

.contact-form-info .info-list .icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: rgba(200, 164, 92, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-form-info .info-list .icon svg {
  width: 20px;
  height: 20px;
  color: var(--color-accent);
}

.contact-form-info .info-list .text .label {
  font-size: 0.8rem;
  color: var(--color-text-lighter);
}

.contact-form-info .info-list .text .value {
  font-size: 0.95rem;
  color: var(--color-text);
  font-weight: 500;
}

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

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 8px;
}

.form-group label .required {
  color: #e53e3e;
  margin-left: 2px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  color: var(--color-text);
  background: var(--color-bg);
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(200, 164, 92, 0.1);
}

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

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-success {
  display: none;
  background: #f0fff4;
  border: 1px solid #9ae6b4;
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  color: #276749;
  font-size: 0.9rem;
  margin-bottom: 20px;
}

.form-success.show {
  display: block;
  animation: fadeInDown 0.4s ease;
}

/* ===== 地图区域 ===== */
.map-section {
  background: var(--color-bg-alt);
}

.map-placeholder {
  width: 100%;
  height: 400px;
  border-radius: var(--radius-lg);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

.map-placeholder iframe {
  width: 100%;
  height: 100%;
  border: none;
}

/* ===== 动画 ===== */
@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 滚动动画 */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }

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

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

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
  }

  .process-flow {
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
  }

  .process-step:not(:last-child)::after {
    display: none;
  }

  .nav-logo .logo-text .name {
    font-size: 0.84rem;
  }

  .nav-logo .logo-icon {
    width: 48px;
    height: 48px;
    font-size: 1.5rem;
  }
}

@media (max-width: 768px) {
  :root {
    --nav-height: 70px;
  }

  .navbar .container {
    padding: 0 8px;
  }

  .nav-logo {
    gap: 10px;
  }

  .nav-logo .logo-icon {
    width: 38px;
    height: 38px;
    font-size: 1.2rem;
  }

  .nav-logo .logo-text .name {
    font-size: 0.6rem;
    letter-spacing: 0;
  }

  .nav-menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    width: 100%;
    background: var(--color-white);
    flex-direction: column;
    padding: 24px;
    gap: 20px;
    box-shadow: var(--shadow-lg);
    transform: translateY(-150%);
    transition: var(--transition);
  }

  .nav-menu.active {
    transform: translateY(0);
  }

  .nav-menu a {
    color: var(--color-text);
  }

  .nav-toggle {
    display: flex;
  }

  .nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero-desc {
    font-size: 1rem;
  }

  .hero-content {
    padding: 80px 0 60px;
  }

  .section {
    padding: 60px 0;
  }

  .section-header h2 {
    font-size: 1.6rem;
  }

  .section-header {
    margin-bottom: 40px;
  }

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

  .about-brief,
  .about-intro,
  .service-detail,
  .contact-form-section {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .service-detail:nth-child(even) .service-detail-text {
    order: 0;
  }

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

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

  .process-flow {
    grid-template-columns: 1fr;
  }

  .contact-info-grid {
    grid-template-columns: 1fr;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .timeline::before {
    left: 20px;
  }

  .timeline-item {
    width: 100%;
    padding-left: 50px;
    padding-right: 0;
    text-align: left !important;
    left: 0 !important;
  }

  .timeline-item .dot {
    left: 13px !important;
    right: auto !important;
  }

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

  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }

  .page-banner h1 {
    font-size: 1.8rem;
  }

  .cta-section h2 {
    font-size: 1.6rem;
  }

  .about-intro .intro-visual .float-card {
    bottom: -20px;
    right: 20px;
    padding: 16px 20px;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero h1 {
    font-size: 1.7rem;
  }

  .hero-content {
    padding: 60px 0 40px;
  }

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

  .contact-form {
    padding: 24px;
  }

  .service-card {
    padding: 32px 24px;
  }
}