/* ===== 基础重置与变量 ===== */
:root {
  --primary: #0d5c48;
  --primary-dark: #094233;
  --primary-light: #e8f3ef;
  --accent: #a61c1c;
  --accent-light: #fef2f2;
  --dark: #1c1c1c;
  --text: #333333;
  --text-muted: #6b7280;
  --bg: #ffffff;
  --bg-light: #f8f9fa;
  --border: #e5e7eb;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
  --radius: 8px;
  --transition: 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  color: var(--text);
  line-height: 1.7;
  background: var(--bg);
}

a {
  text-decoration: none;
  color: inherit;
}

ul {
  list-style: none;
}

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

.container {
  width: 92%;
  max-width: 1200px;
  margin: 0 auto;
}

.section {
  padding: 80px 0;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--dark);
  text-align: center;
  margin-bottom: 12px;
  letter-spacing: 1px;
}

.section-subtitle {
  text-align: center;
  color: var(--text-muted);
  font-size: 1rem;
  margin-bottom: 48px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 32px;
  border-radius: 4px;
  font-weight: 500;
  font-size: 0.95rem;
  transition: var(--transition);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}

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

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--primary);
}

.btn-outline:hover {
  background: var(--primary);
  color: #fff;
}

.btn-accent {
  background: var(--accent);
  color: #fff;
}

.btn-accent:hover {
  background: #8a1818;
}

/* ===== 头部导航 ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

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

.logo img {
  height: 48px;
  width: auto;
}

.logo-text {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--dark);
  line-height: 1.3;
  max-width: 340px;
  white-space: nowrap;
}

.nav ul {
  display: flex;
  gap: 36px;
}

.nav a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text);
  position: relative;
  padding: 6px 0;
}

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

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

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

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--dark);
  transition: var(--transition);
}

/* ===== Hero 首页大图 ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
  color: #fff;
  text-align: center;
  padding-top: 72px;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%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");
  opacity: 0.4;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  padding: 0 20px;
}

.hero-subtitle {
  font-size: 1rem;
  letter-spacing: 4px;
  text-transform: uppercase;
  opacity: 0.9;
  margin-bottom: 20px;
}

.hero-title {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 20px;
  line-height: 1.3;
}

.hero-desc {
  font-size: 1.2rem;
  opacity: 0.9;
  margin-bottom: 40px;
  line-height: 1.8;
}

.hero-btns {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-btns .btn-outline {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.6);
}

.hero-btns .btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

/* ===== 首页简介 ===== */
.intro {
  background: var(--bg);
}

.intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.intro-content h2 {
  font-size: 2rem;
  color: var(--dark);
  margin-bottom: 20px;
}

.intro-content p {
  color: var(--text-muted);
  margin-bottom: 16px;
  text-align: justify;
}

.intro-img {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  background: var(--primary-light);
  min-height: 360px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.intro-img img {
  width: 70%;
  height: auto;
  opacity: 0.95;
}

/* ===== 数据亮点 ===== */
.stats {
  background: var(--primary);
  color: #fff;
  padding: 60px 0;
}

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

.stat-item h3 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.stat-item p {
  font-size: 0.95rem;
  opacity: 0.9;
}

/* ===== 服务预览 ===== */
.services-preview {
  background: var(--bg-light);
}

.service-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border-top: 3px solid var(--primary);
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.1);
}

.service-card .icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--primary);
  margin-bottom: 20px;
}

.service-card h3 {
  font-size: 1.2rem;
  margin-bottom: 12px;
  color: var(--dark);
}

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

/* ===== 典型案例 ===== */
.cases-preview {
  background: var(--bg);
}

.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.case-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  min-height: 260px;
  background-size: cover;
  background-position: center;
  background-color: var(--primary);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 24px;
  color: #fff;
  transition: var(--transition);
}

/* 暗色遮罩覆盖层 */
.case-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.15) 0%, rgba(0, 0, 0, 0.7) 100%);
  z-index: 0;
  border-radius: var(--radius);
}

.case-card span,
.case-card h3 {
  position: relative;
  z-index: 1;
}

.case-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.12);
}

.case-card span {
  font-size: 0.8rem;
  letter-spacing: 1px;
  opacity: 0.8;
  margin-bottom: 6px;
}

.case-card h3 {
  font-size: 1.1rem;
  line-height: 1.5;
}

/* ===== 页面横幅 ===== */
.page-banner {
  position: relative;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
  color: #fff;
  padding: 140px 0 70px;
  text-align: center;
  margin-top: 72px;
}

.page-banner h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.page-banner p {
  opacity: 0.9;
  letter-spacing: 2px;
}

/* ===== 关于我们页面 ===== */
.about-content {
  background: var(--bg);
}

.about-block {
  margin-bottom: 60px;
}

.about-block:last-child {
  margin-bottom: 0;
}

.about-block h2 {
  font-size: 1.7rem;
  color: var(--dark);
  margin-bottom: 20px;
  padding-left: 16px;
  border-left: 4px solid var(--primary);
}

.about-block p {
  color: var(--text-muted);
  margin-bottom: 16px;
  text-align: justify;
}

.qualifications-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.qual-item {
  background: var(--bg-light);
  border-radius: var(--radius);
  padding: 20px 24px;
  border-left: 4px solid var(--accent);
  font-weight: 500;
  color: var(--dark);
}

.partners-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.partner-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 12px;
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: var(--transition);
}

.partner-item:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
}

/* ===== 服务页面 ===== */
.services-detail {
  background: var(--bg);
}

.service-detail-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-bottom: 80px;
}

.service-detail-item:nth-child(even) {
  direction: rtl;
}

.service-detail-item:nth-child(even) > * {
  direction: ltr;
}

.service-detail-item h3 {
  font-size: 1.6rem;
  color: var(--dark);
  margin-bottom: 16px;
}

.service-detail-item p {
  color: var(--text-muted);
  margin-bottom: 16px;
  text-align: justify;
}

.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.service-tag {
  background: var(--primary-light);
  color: var(--primary);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.85rem;
}

.service-img {
  background: var(--primary-light);
  border-radius: var(--radius);
  min-height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 4rem;
  box-shadow: var(--shadow);
}

.cases-section {
  background: var(--bg-light);
}

.cases-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.case-item {
  background: #fff;
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  border-left: 4px solid var(--primary);
  transition: var(--transition);
}

.case-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.1);
}

.case-item h4 {
  font-size: 1.1rem;
  color: var(--dark);
  margin-bottom: 12px;
}

.case-item p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

.case-item .meta {
  margin-top: 12px;
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 500;
}

/* ===== 联系页面 ===== */
.contact-section {
  background: var(--bg-light);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
}

/* 联系页面新布局 */
.contact-layout {
  display: grid;
  grid-template-columns: 1.4fr 0.6fr;
  gap: 48px;
  align-items: start;
}

.contact-main {
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 2px 24px rgba(0, 0, 0, 0.05);
  overflow: hidden;
}

.contact-row {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 28px 36px;
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

.contact-row:last-child {
  border-bottom: none;
}

.contact-row:hover {
  background: var(--primary-light);
}

.contact-row-highlight {
  background: linear-gradient(135deg, var(--primary-light), #f0faf7);
}

.contact-row-highlight:hover {
  background: linear-gradient(135deg, #d4ede4, #e6f5ef);
}

.contact-icon-circle {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
}

.contact-row-highlight .contact-icon-circle {
  background: var(--primary);
  color: #fff;
  font-size: 1.3rem;
}

.contact-text {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.contact-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.contact-value {
  font-size: 1.05rem;
  color: var(--dark);
  font-weight: 500;
}

.contact-phone {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
  letter-spacing: 1px;
  transition: var(--transition);
}

.contact-phone:hover {
  color: var(--primary-dark);
}

/* 右侧区域 */
.contact-side {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-qr-card {
  background: #fff;
  border-radius: 12px;
  padding: 32px 24px;
  text-align: center;
  box-shadow: 0 2px 24px rgba(0, 0, 0, 0.05);
}

.contact-qr-card img {
  width: 140px;
  height: auto;
  margin: 0 auto 16px;
  border-radius: 8px;
  border: 1px solid var(--border);
}

.contact-qr-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.contact-tip {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  border-radius: 12px;
  padding: 28px 24px;
  text-align: center;
  font-size: 0.95rem;
  line-height: 1.8;
  box-shadow: 0 4px 20px rgba(13, 92, 72, 0.25);
}

.contact-info h2 {
  font-size: 1.6rem;
  color: var(--dark);
  margin-bottom: 24px;
}

.contact-info-item {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
}

.contact-info-item .icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.contact-info-item h4 {
  font-size: 1rem;
  color: var(--dark);
  margin-bottom: 4px;
}

.contact-info-item p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.contact-form {
  background: var(--bg-light);
  border-radius: var(--radius);
  padding: 36px;
  box-shadow: var(--shadow);
}

.form-group {
  margin-bottom: 20px;
}

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

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-family: inherit;
  transition: var(--transition);
  background: #fff;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(13, 92, 72, 0.1);
}

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

/* ===== CTA ===== */
.cta {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
  color: #fff;
  text-align: center;
  padding: 80px 0;
}

.cta h2 {
  font-size: 2rem;
  margin-bottom: 16px;
}

.cta p {
  opacity: 0.9;
  margin-bottom: 32px;
  font-size: 1.1rem;
}

/* ===== 页脚 ===== */
.footer {
  background: var(--dark);
  color: rgba(255, 255, 255, 0.8);
  padding: 60px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 36px;
  margin-bottom: 40px;
}

.footer-brand img {
  height: 56px;
  width: auto;
  margin-bottom: 16px;
  background: #fff;
  padding: 4px;
  border-radius: 4px;
}

.footer-brand p {
  font-size: 0.95rem;
  line-height: 1.8;
  opacity: 0.8;
}

.footer h4 {
  color: #fff;
  font-size: 1rem;
  margin-bottom: 20px;
  letter-spacing: 1px;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  opacity: 0.8;
  transition: var(--transition);
  font-size: 0.95rem;
}

.footer-links a:hover {
  opacity: 1;
  color: #fff;
  padding-left: 4px;
}

.footer-contact li {
  margin-bottom: 10px;
  font-size: 0.95rem;
  opacity: 0.8;
}

.footer-qrcode {
  text-align: left;
}

.footer-qrcode img {
  width: 120px;
  height: auto;
  border-radius: 4px;
  border: 4px solid rgba(255, 255, 255, 0.2);
  margin-bottom: 8px;
  background: #fff;
}

.footer-qrcode h4 {
  text-align: left;
}

.footer-qrcode p {
  font-size: 0.85rem;
  opacity: 0.7;
  text-align: left;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  text-align: center;
  font-size: 0.85rem;
  opacity: 0.6;
}

/* ===== 响应式 ===== */
@media (max-width: 992px) {
  .intro-grid,
  .service-detail-item,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

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

  .contact-side {
    flex-direction: row;
    gap: 24px;
  }

  .contact-qr-card,
  .contact-tip {
    flex: 1;
  }

  .service-detail-item:nth-child(even) {
    direction: ltr;
  }

  .service-img {
    min-height: 220px;
  }

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

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

@media (max-width: 768px) {
  .nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--border);
    padding: 16px 0;
    transform: translateY(-150%);
    transition: var(--transition);
    z-index: 999;
  }

  .nav.open {
    transform: translateY(0);
  }

  .nav ul {
    flex-direction: column;
    align-items: center;
    gap: 16px;
  }

  .mobile-menu-btn {
    display: flex;
  }

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

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

  .service-cards,
  .cases-grid,
  .cases-list,
  .qualifications-grid,
  .partners-grid {
    grid-template-columns: 1fr;
  }

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

  .contact-side {
    flex-direction: column;
  }

  .contact-row {
    padding: 22px 24px;
  }

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

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

@media (max-width: 480px) {
  .section {
    padding: 60px 0;
  }

  .section-title {
    font-size: 1.5rem;
  }

  .logo-text {
    display: none;
  }

  .hero-title {
    font-size: 1.6rem;
  }

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