:root {
  --primary-color: #a56752; /* 提取自图片的铜红色 */
  --text-dark: #333333;
  --text-light: #666666;
  --bg-light: #eeeae6; /* 米色背景 */
  --bg-dark: #1a1b20; /* 底部深色背景 */
  --white: #ffffff;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font-family: 'Helvetica Neue', Helvetica, Arial, 'PingFang SC', sans-serif;
  color: var(--text-dark);
  background-color: #eeeae6;
  line-height: 1.6;
}
a {
  text-decoration: none;
  color: inherit;
  transition: 0.3s;
}
ul {
  list-style: none;
}
img {
  max-width: 100%;
  display: block;
}

/* ================= 通用组件/布局 ================= */
.container {
  max-width: 1360px;
  margin: 0 auto;
  padding: 0 20px;
}
.section-padding {
  padding: 80px 0;
  overflow: hidden;
}
.text-center {
  text-align: center;
}
.text-light {
  color: var(--text-light);
}
.margin-top-50 {
  margin-top: 50px;
}

/* 按钮样式 & 悬停动画 */
.btn {
  margin-top: 30px;
  display: inline-block;
  padding: 10px 30px;
  border: 1px solid var(--primary-color);
  color: var(--primary-color);
  background: transparent;
  cursor: pointer;
  font-size: 14px;
  position: relative;
  overflow: hidden;
  transition: all 0.4s ease;
}
.btn:hover {
  background: var(--primary-color);
  color: var(--white);
  padding-right: 40px;
}
.btn::after {
  content: '→';
  position: absolute;
  right: 25px;
  opacity: 1;
  transition: 0.4s;
}
.btn:hover::after {
  right: 10px;
  opacity: 1;
}

/* 标题样式 */
.section-box {
  padding: 80px 0;
  display: flex;
}
.section-title {
  flex: 1;
  margin-bottom: 50px;
}
.section-title h2 {
  font-size: 32px;
  color: var(--white);
  margin-bottom: 0px;
}
.section-title.dark h2 {
  color: var(--text-dark);
}

/* ================= 头部 Header ================= */
header {
  background-color: #eeeae6;
  height: 90px;
  display: flex;
  align-items: center;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  position: sticky;
  top: 0;
  z-index: 1000;
}
.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}
.logo img {
  height: 41px;
  width: 345px;
}
.header_right {
  /* flex: 1; */
  display: flex;
  align-items: center;
}
.nav-menu {
  margin-right: 102px;
  width: 540px;
  color: #201f26;
  font-size: 17px;
  gap: unset;
  display: flex;
  justify-content: space-between;
}

.nav-menu li a {
  font-size: 17px;
  line-height: 30px;
}
.nav-menu li a:hover,
.nav-menu li a.active {
  color: var(--primary-color);
}

.nav-menu li a.active {
  color: var(--primary-color);
  position: relative;
}

.nav-menu li a.active::after {
  content: ' ';
  width: 68px;
  height: 1px;
  background-color: #9e5248;
  position: absolute;
  bottom: -5px;
  transform: translateX(-50%);
  left: 50%;
  /* bottom: 15px; */
}

.header-tools {
  justify-content: center;
  gap: 34px;
}

.header-tools-right {
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 36px;
  color: #201f26;
  font-size: 16px;
}
.mobile-toggle {
  display: none;
  font-size: 24px;
  cursor: pointer;
}

/* ================= 轮播图 Swiper ================= */
.swiper-container {
  width: 100%;
  height: 600px;
}
.swiper-slide {
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  justify-content: flex-start;
} /* 首页文本靠左 */
.overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.3);
}
.hero-text {
  color: #fff;
  text-align: left;
  z-index: 2;
  padding-left: 20px;
}
.hero-text h2 {
  font-size: 48px;
  margin-bottom: 20px;
}

/* ================= 首页特定样式 ================= */
.index-intro-section {
  display: flex;
  gap: 40px;
  flex-wrap: wrap;
  align-items: center;
  padding-bottom: 60px;
}
.image-collage {
  flex: 1;
  display: flex;
  gap: 10px;
  height: 400px;
  min-width: 300px;
}
.collage-item {
  flex: 1;
  background-size: cover;
  background-position: center;
}
.item-1 {
  margin-top: 50px;
}
.item-2 {
  margin-bottom: 50px;
}
.item-3 {
  margin-top: 20px;
}
.intro-text-block {
  flex: 1;
  min-width: 300px;
}
.intro-text-block h2 {
  font-size: 36px;
  margin-bottom: 20px;
}

/* 我们的服务 */
.service-cards-row {
  display: flex;
  justify-content: center;
  gap: 56px;
  flex-wrap: wrap;
  padding-bottom: 100px;
}
.service-card {
  border: 1px solid rgba(255, 255, 255, 0.3);
  padding: 75px 0 85px;
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  flex: 1;
  min-width: 300px;
  border-radius: 80px 0 80px 0;
  color: var(--white);
  background: rgba(255, 255, 255, 0.1);
  font-size: 20px;
  transition: transform 0.3s ease;
}
.service-card:hover {
  transform: translateY(-5px);
}
.service-card img {
  width: 80px;
  margin-bottom: 50px;
}
.service-card h3 {
  margin-bottom: 5px;
}
.service-card-sub {
  margin-top: 5px;
  font-weight: 100;
  font-size: 18px;
}
.service-card ul {
  margin-top: 20px;
  font-size: 16px;
  list-style: disc;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* 品牌理念 (首页) */
.index-philosophy-section {
  display: flex;
  align-items: center;
  gap: 50px;
  flex-wrap: wrap-reverse;
}
.philosophy-text {
  flex: 1;
  min-width: 300px;
}
.philosophy-text h2 {
  font-size: 32px;
  margin-bottom: 20px;
}
.philosophy-img {
  flex: 1;
  min-width: 300px;
}
.philosophy-img img {
  width: 100%;
  border-radius: 5px;
  height: 450px;
  object-fit: cover;
}

/* ================= 关于我们特定样式 ================= */
.company-profile-text {
  flex: 2;
}
.company-profile-text p {
  text-align: justify;
  color: var(--text-light);
}
.city-image-block {
  width: 100vw;
  height: 500px;
  width: 100px;
}
.city-image-block img {
  width: 100%;
  position: absolute;
  left: 0;
  height: 500px;
  object-fit: cover;
}

.culture-section-bg {
  background: #f9f9f9;
}
.culture-grid {
  display: flex;
  gap: 50px;
  flex-wrap: wrap;
}
.culture-title-col {
  flex: 1;
}
.culture-title-col h3 {
  font-size: 30px;
  margin-bottom: 20px;
}
.culture-content-col {
  flex: 2;
}
.culture-content-col h4 {
  color: var(--primary-color);
  margin-top: 30px;
  font-size: 24px;
}

.concept-team-row {
  display: flex;
  gap: 39px;
  flex-wrap: wrap;
}
.concept-team-card {
  flex: 1;
  border-radius: 20px;
  height: 300px;
  background: var(--white);
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
  min-width: 300px;
  overflow: hidden;
  background-size: cover;
  background-position: center;
  text-align: justify;
}
.concept-team-card div {
  background-image: linear-gradient(180deg, rgba(255, 255, 255, 1) 15%, rgba(0, 0, 0, 0) 100%);
  height: 100%;
  padding: 30px 35px;
}
.concept-team-card h3 {
  padding-bottom: 20px;
  position: relative;
  font-size: 24px;
}
.concept-team-card h3::after {
  content: '';
  position: absolute;
  transform: translateX(-50%);
  left: 50%;
  bottom: 15px;
  width: 30px;
  height: 3px;
  background: var(--primary-color);
}

/* ================= 通用内容布局 (贸易/投资/咨询) ================= */
.content-hero-banner {
  height: 300px;
  background-size: cover;
  background-position: center;
}
.content-h2 {
  margin-bottom: 30px;
  font-size: 24px;
}
.contact_nav.container {
  padding: 21px 0;
  font-size: 16px;
  display: flex;
  justify-content: space-between;
}
.line_box {
  position: absolute;
  left: 0;
  width: 100vw;
  height: 1px;
  background-color: #d6cfc8;
}
.anchor_a {
  margin-left: 15px;
}
.anchor_a:hover {
  color: var(--primary-color);
}

/* 左右图文结构 (用于贸易、投资、咨询页) */
.zigzag-section {
  display: flex;
  align-items: flex-end;
  margin-bottom: 60px;
}
.zigzag-section:nth-child(odd) {
  flex-direction: row-reverse;
}
.zigzag-img {
  width: 55%;
  height: 400px;
  margin-right: -5%;
}
.zigzag-section:nth-child(odd) .zigzag-img {
  margin-right: 0;
  margin-left: -5%;
}
.zigzag-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.zigzag-content {
  width: 50%;
  position: relative;
  padding: 60px;
  background: #e7e4df;
  height: 300px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.zigzag-content h3 {
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.zigzag-content h3 img {
  width: 35px;
  height: 35px;
}
.zigzag-content ul li {
  margin-bottom: 10px;
  position: relative;
  padding-left: 15px;
  font-size: 14px;
  color: var(--text-light);
}
.zigzag-content ul li::before {
  content: '•';
  color: var(--primary-color);
  position: absolute;
  left: 0;
  font-size: 24px;
  line-height: 1em;
}
.zigzag-content p {
  font-size: 14px;
  color: var(--text-light);
}

/* ================= 联系我们特定样式 ================= */
.contact-spacer {
  max-height: 500px;
}
.contact-spacer img {
  width: 100%;
  max-height: 500px;
  object-fit: cover;
}
.contact-card-wrap {
  margin: 0 auto;
}
.contact-card {
  background-size: 100% 100%;
  background: rgba(0, 0, 0, 0.6);
  color: var(--white);
  padding: 40px;
  text-align: center;
  border-radius: 10px;
  width: 100%;
}
.contact-card h2 {
  margin-bottom: 20px;
}
.contact-card p {
  margin-bottom: 10px;
}

.map-container {
  position: relative;
  width: 100%;
  max-width: 1000px;
  margin: 50px auto;
}
.world-map-img {
  width: 100%;
}
.map-pin {
  position: absolute;
  color: #cc0000;
  font-size: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  cursor: pointer;
  transition: transform 0.2s ease;
}
.map-pin:hover {
  transform: scale(1.2);
  z-index: 5;
}
.map-pin span {
  font-size: 12px;
  color: #333;
  margin-bottom: 5px;
  font-weight: bold;
  background: rgba(255, 255, 255, 0.8);
  padding: 2px 5px;
  border-radius: 3px;
  white-space: nowrap;
}
/* 简单的定位示例 (需根据实际地图图片调整百分比) */
.pin-ny {
  top: 35%;
  left: 25%;
}
.pin-sh {
  top: 45%;
  left: 75%;
}
.pin-ist {
  top: 40%;
  left: 55%;
}

/* ================= 底部 Footer ================= */
footer {
  color: #ccc;
  font-size: 13px;
  height: 420px;
  background-color: #201f26;
  padding-top: 82px;
}
.footer-grid {
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  display: flex;
  justify-content: space-between;
  margin-bottom: 81px;
}
.footer-col h4 {
  color: #fff;
  font-size: 18px;
  margin-bottom: 30px;
}
.footer-col ul li {
  margin-bottom: 10px;
  font-size: 16px;
  color: #ffffff;
}
.footer-col ul li a:hover {
  color: var(--primary-color);
}
.copyright {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid #eeeae6;
  padding-top: 20px;
  color: #ffffff;
  font-size: 16px;
}
.socials a {
  color: #ccc;
  margin-left: 10px;
}
.socials a:hover {
  color: var(--primary-color);
}

/* ================= 响应式适配 (Mobile) ================= */
@media (max-width: 768px) {
  .header-inner {
    position: relative;
  }
  .mobile-toggle {
    display: block;
  }
  .nav-menu {
    position: absolute;
    top: 80px;
    width: 150px;
    left: 0;
    /* width: 100%; */
    background: #fff;
    flex-direction: column;
    gap: 0;
    display: none;
    border-top: 1px solid #eee;
  }
  .nav-menu.active {
    display: flex;
  }
  .nav-menu li a {
    display: block;
    padding: 15px 20px;
    border-bottom: 1px solid #f5f5f5;
  }

  .swiper-container {
    height: 350px;
  }
  .hero-text h2 {
    font-size: 28px;
  }

  .index-intro-section,
  .index-philosophy-section,
  .culture-grid,
  .concept-team-row {
    flex-direction: column;
  }
  .image-collage {
    height: 300px;
    flex: none;
  }
  .collage-item {
    margin: 0 !important;
  }

  .service-cards-row {
    gap: 20px;
  }
  .service-card {
    width: 100%;
  }

  .company-profile-text {
    margin-left: 0;
  }

  .city-image-block {
    height: 300px;
  }
  .city-image-block img {
    height: 300px;
  }

  .concept-team-card {
    flex: none;
  }

  .zigzag-section,
  .zigzag-section:nth-child(odd) {
    flex-direction: column;
    height: auto;
    margin-bottom: 30px;
  }
  .zigzag-img,
  .zigzag-content {
    flex: none;
    width: 100%;
    height: auto;
    margin-right: 0;
  }
  .zigzag-content {
    padding: 30px;
  }
  .content-h2 {
    margin-top: 30px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .copyright {
    flex-direction: column;
    gap: 10px;
    text-align: center;
  }

  .philosophy-img img {
    height: 300px;
  }

  .section-box {
    padding: 30px;
    flex-direction: column;
  }
  .section-title h2 {
    font-size: 24px;
  }
  .company-profile-text p {
    font-size: 14px;
  }

  .contact_nav.container {
    padding: 15px 6px;
  }
}