@CHARSET "UTF-8";
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Inter", "Microsoft Yahei", PingFang SC, sans-serif;
  image-rendering: crisp-edges;
}
html {
  scroll-behavior: smooth;
}
a {
  text-decoration: none;
  color: inherit;
}
ul {
  list-style: none;
}
img {
  max-width: 100%;
  display: block;
}

:root {
  --main-blue: #0A3256;
  --light-gold: #C8A86A;
  --text-dark: #202936;
  --text-gray: #64748B;
  --bg-light: #F8FAFD;
  --border-line: #E2E8F0;
  --card-bg: #102b50;
  --case-border: #0A3256;
  --hover-red: #f53f3f;
  --gray-disabled: #c2c9d6;
}
body {
  background: #ffffff;
  color: var(--text-dark);
  line-height: 1.8;
  font-size: 16px;
  font-weight: 400;
}
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
  overflow-x: clip;
}

header {
  position: sticky;
  top: 0;
  background: #ffffff;
  border-bottom: 1px solid var(--border-line);
  z-index: 999;
}
.nav-wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 72px;
}
.logo {
  display: flex;
  align-items: center;
}
.logo-img {
  height: 46px;
}
.nav-list {
  display: flex;
  gap: 26px;
}
.nav-list li a {
  font-size: 16px;
  font-weight: 500;
  color: var(--text-gray);
  padding: 8px 0;
  position: relative;
  transition: 0.25s ease;
}
.nav-list li a:hover,
.nav-list li a.active {
  color: var(--main-blue);
  font-weight: 700;
}
.nav-list li a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--light-gold);
  transition: 0.25s ease;
}
.nav-list li a:hover::after,
.nav-list li a.active::after {
  width: 100%;
}

.banner {
  width: 100vw;
  height: 600px;
  margin-left: calc(50% - 50vw);
  position: relative;
  background: var(--main-blue) url("../images/banner.jpg") center/cover no-repeat;
}
.banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(8, 30, 52, 0.6);
}
.banner-content {
  position: relative;
  z-index: 2;
  color: #fff;
  padding-top: 60px;
}
.banner-content h1 {
  font-size: 48px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 16px;
  text-shadow: 0 2px 12px rgba(0,0,0,0.2);
}
.banner-content p {
  font-size: 18px;
  font-weight: 300;
  opacity: 0.9;
  max-width: 700px;
  margin-bottom: 30px;
}
.banner-btn {
  padding: 14px 38px;
  background: #fff;
  color: var(--main-blue);
  font-weight: 600;
  display: inline-block;
  border-radius: 2px;
  transition: 0.3s;
}
.banner-btn:hover {
  background: var(--light-gold);
  color: #fff;
}
.banner-erji {
  width: 100vw;
  height: 200px;
  margin-left: calc(50% - 50vw);
  position: relative;
  background: var(--main-blue) url("../images/banner2.jpg") center/cover no-repeat;
}
.banner-erji-content {
  position: relative;
  z-index: 2;
  color: #fff;
}
.banner-erji::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(8, 30, 52, 0.4);
}
section {
  padding: 60px 0;
}
.bg-light {
  background: var(--bg-light);
}
.sec-title {
  margin-bottom: 44px;
}
.sec-title h2 {
  font-size: 32px;
  font-weight: 700;
  color: var(--main-blue);
  margin-bottom: 8px;
}
.sec-title .line {
  width: 64px;
  height: 3px;
  background: var(--light-gold);
  margin-bottom: 12px;
}
.sec-title p {
  color: var(--text-gray);
  font-size: 15px;
}

#copyright, #cases {
  padding-top: 55px;
  padding-bottom: 5px;
}
#copyright .sec-title, #cases .sec-title {
  margin-bottom: 5px;
}

.scroll-wrap {
  width: 100%;
  position: relative;
  overflow: visible;
  display: flex;
  align-items: center;
  padding: 0 60px;
}
#copyright .scroll-wrap {
  height: 520px;
}
#cases .scroll-wrap {
  height: 580px;
}

.scroll-btn {
  position: absolute;
  top: 30px;
  bottom: 90px;
  width: 40px;
  height: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  border-radius: 0;
  font-size: 48px;
  color: var(--main-blue);
  cursor: pointer;
  z-index: 100;
  transition: 0.2s ease;
  line-height: 1;
}
.prev-copyright, .prev-case {
  left: 0;
}
.next-copyright, .next-case {
  right: 0;
}
.scroll-btn:disabled {
  color: var(--gray-disabled);
  cursor: not-allowed;
}
.scroll-btn:not(:disabled):hover {
  color: var(--light-gold);
  transform: scale(1.15);
}

.copyright-scroll-box {
  width: 100%;
  height: 480px;
  overflow-x: hidden;
  overflow-y: visible;
}
.copyright-track {
  height: 420px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.copyright-img {
  width: 400px;
  height: 280px;
  flex-shrink: 0;
  background-size: cover;
  background-position: center;
  cursor: pointer;
  z-index: 1;
  transition: transform 0.3s ease;
}
.copyright-img:hover {
  transform: scale(1.45);
  z-index: 99;
}

.case-scroll-box {
  width: 100%;
  height: 550px;
  overflow-x: hidden;
  overflow-y: hidden;
}
.case-track {
  height: 500px;
  display: flex;
  align-items: center;
  gap: 20px;
}
.case-img {
  width: 480px;
  height: 360px;
  flex-shrink: 0;
  background-size: 100% 100%;
  background-position: center;
  background-repeat: no-repeat;
  border: 3px solid var(--main-blue);
  cursor: pointer;
  z-index: 1;
  transition: transform 0.3s ease, border-color 0.3s ease;
}
.case-img:hover {
  transform: scale(1.4); 
  border-color: var(--main-blue);
  z-index: 99;
}

.about-text, .founder-box {
  margin: 0 auto;
}
.about-text {
  color: var(--text-gray);
  font-size: 16px;
}
.about-text p {
  margin-bottom: 16px;
}
.about-text strong {
  color: var(--main-blue);
  font-weight: 600;
}

.founder-box {
  display: flex;
  gap: 42px;
  align-items: center;
  flex-wrap: wrap;
}
.founder-img {
  width: 400px;
  height: 400px;
  background: #E9EEF6;
  flex-shrink: 0;
  border-radius: 4px;
  background-image: url("../images/default-founder.jpg");
  background-size: cover;
  background-position: center;
}
.founder-text {
  flex: 1;
  min-width: 300px;
}
.founder-text h3 {
  font-size: 24px;
  color: var(--main-blue);
  font-weight: 700;
  margin-bottom: 10px;
}
.founder-text .tag {
  color: var(--light-gold);
  font-weight: 500;
  margin-bottom: 18px;
}
.founder-text p {
  color: var(--text-gray);
  margin-bottom: 12px;
}


.culture-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.culture-card {
  background: var(--card-bg);
  border-radius: 4px;
  display: flex;
  padding: 28px 28px;
  color: var(--light-gold);
  gap: 24px;
}

.culture-card-title {
  flex-shrink: 0;
  width: 160px;
  border-right: 1px solid rgba(200, 168, 106, 0.3);
  padding-right: 24px;
  display: flex;
  align-items: center;
  justify-content: center; 
  min-height: 100%;
  text-align: center;
}
.culture-card-title h3 {
  font-size: 30px;
  font-weight: 700;
  margin-bottom: 6px;
}
.culture-card-title .en-name {
  font-size: 18px;
  font-weight: 400;
  opacity: 0.85;
}

.culture-card-desc {
  flex: 1.3;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  min-height: 100%;
  padding: 10px 0 10px 12px; 
}
.culture-card-desc p {
  font-size: 20px;
  line-height: 2.2;
  margin: 0;
  padding: 0;
  width: 100%;
}
.culture-card-desc b {
  color: #ffffff;
  font-weight: 400;
}

.product-wrap {
  display: flex;
  flex-direction: column;
  gap: 48px;
}
.product-section-title {
  font-size: 28px;
  color: var(--main-blue);
  font-weight: 700;
  margin-bottom: 24px;
  position: relative;
  padding-left: 16px;
}
.product-section-title .en-sub {
  font-size: 18px;
  font-weight: 400;
  color: var(--text-gray);
  margin-left: 10px;
}
.product-section-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 4px;
  height: 24px;
  background: var(--card-bg);
}
.product-card-grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.product-card-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.product-dark-card {
  background: var(--card-bg);
  border-radius: 6px;
  position: relative;
  overflow: hidden;
  transition: 0.3s ease;
}
.product-dark-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 28px rgba(10, 50, 86, 0.15);
}
.card-hover-mask {
  position: absolute;
  inset: 0;
  background-color: rgba(230, 238, 245,0.9);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 14px;
  padding: 20px 18px;
  width: 100%;
  color: var(--main-blue);
  text-align: center;
  transform: translateY(-100%);
  opacity: 0;
  transition: all 0.32s ease;
}
.product-dark-card:hover .card-hover-mask {
  transform: translateY(0);
  opacity: 1;
}
.card-hover-mask p:first-child {
  font-size: 34px;
  font-weight: 700;
  line-height: 1.6;
  text-align: center;
  width: 100%;
}
.card-hover-mask p:last-child {
  font-size: 16px;
  line-height: 1.6;
  text-align: center;
  width: 100%;
}
.card-hover-mask p:nth-child(2) {
  font-size: 16px;
  text-align: center;
  width: 100%;
}
.card-img-box {
  width: 100%;
  height: 180px;
  background: #c5d4e8;
  background-size: cover;
  background-position: center;
}
.card-label-bar {
  width: 100%;
  padding: 12px;
  font-size: 20px;
  font-weight: 700;
  background: rgba(0,0,0,0.4); 
  text-align: center;
  letter-spacing: 1px;
  color: #fff;
  font-synthesis: none;
  text-shadow: 0 1px 3px rgba(0,0,0,0.6);
}

.scene-wall {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.scene-item {
  width: 100%;
  height: 240px;
  background-size: cover;
  background-position: center;
  cursor: pointer;
  transition: transform 0.3s ease;
}
.scene-item:hover {
  transform: scale(1.05);
}


#advantage .sec-title {
  margin-bottom: 44px;
}
.advantage-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.advantage-card {
  background: var(--card-bg);
  border-radius: 4px;
  display: flex;
  padding: 18px 22px;
  color: var(--light-gold);
  gap: 20px;
}
.adv-head-wrap {
  flex-shrink: 0;
  width: 180px;
  border-right: 1px solid rgba(200, 168, 106, 0.3);
  padding-right: 10px;
  display: flex;
  align-items: center;
  justify-content: center; 
  min-height: 100%;
  text-align: center;
}
.adv-head h3 {
  font-size: 28px;
  font-weight: 700;
  margin: 0;
}

.adv-desc {
  flex: 1.3;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  min-height: 100%;
  padding: 16px 0 16px 12px;
}
.adv-desc p {
  font-size: 18px;
  line-height: 1.8;
  margin: 0;
  padding: 0;
  width: 100%;
  color: #ffffff;
}

.contact-wrap {
  font-size: 17px;
  line-height: 2;
}
.contact-info strong {
  color: var(--main-blue);
}
.contact-center-box {
  width: 100%;
  display: flex;
  justify-content: center;
}
.contact-info {
  max-width: 900px;
  width: 100%;
  text-align: left;
}
.contact-info p {
  margin-bottom: 14px;
  font-size: 17px;
}
#map-container {
  margin-top: 32px;
  width: 100%;
}
#map-container iframe {
  width: 100%;
  max-width: 900px;
  height: 420px;
  display: block;
}
footer {
  padding: 40px 0;
  background: var(--card-bg);
  color: #fff;
  text-align: center;
  font-size: 14px;
}
footer p {
  margin-bottom: 8px;
}
footer a {
  color: var(--light-gold);
  margin: 0 8px;
}

@media screen and (max-width:768px) {
.nav-wrap {
    flex-direction:column;
    height:auto;
    padding:12px 0;
    gap:12px;
  }
  .nav-list {
    flex-wrap:wrap;
    justify-content:center;
    row-gap:8px;
  }  
.culture-grid {
    grid-template-columns: 1fr;
  }
  .culture-card {
    flex-direction: column;
    text-align: center;
    gap:16px;
    padding:20px;
  }
  .culture-card-title {
    width: 100%;
    border-right: none;
    border-bottom:1px solid rgba(200, 168, 106, 0.3);
    padding-right:0;
    padding-bottom:12px;
  }
  .culture-card-title h3 {
    font-size:24px;
  }
  .culture-card-desc {
    padding:0;
    justify-content:center;
  }
  .culture-card-desc p {
    font-size:16px;
    text-align:center;
  }
}