/* 本地字体声明 */
@font-face {
  font-family: 'Source Han Serif SC';
  src: url('fonts/SourceHanSerifSC-Regular.otf') format('opentype');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Source Han Serif SC';
  src: url('fonts/SourceHanSerifSC-Medium.otf') format('opentype');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Source Han Serif SC';
  src: url('fonts/SourceHanSerifSC-Bold.otf') format('opentype');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* 响应式图片 - 高清质量 */
img {
  max-width: 100%;
  height: auto;
  display: block;
  image-rendering: -webkit-optimize-contrast;
  image-rendering: crisp-edges;
  image-rendering: high-quality;
  image-rendering: optimize-quality;
  -webkit-backface-visibility: hidden;
  -webkit-transform: translateZ(0);
  transform: translateZ(0);
  width: 100%;
  object-fit: cover;
}

/* 响应式文字大小 */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-size: clamp(1.2rem, 4vw, 3rem);
  line-height: 1.2;
}

p,
span,
div,
a {
  font-size: clamp(0.9rem, 2.5vw, 1.1rem);
  line-height: 1.6;
}

/* 响应式容器 */
.container,
.content,
.section {
  width: 100%;
  max-width: 100vw;
  padding: clamp(1rem, 5vw, 3rem);
  box-sizing: border-box;
}

/* 响应式背景图片 - 高清质量 */
[style*="background-image"],
[style*="background: url"] {
  background-size: cover !important;
  background-position: center !important;
  background-repeat: no-repeat !important;
  image-rendering: -webkit-optimize-contrast;
  image-rendering: crisp-edges;
  image-rendering: high-quality;
  image-rendering: optimize-quality;
  -webkit-backface-visibility: hidden;
  -webkit-transform: translateZ(0);
  transform: translateZ(0);
}

/* 响应式背景容器 - 高清质量 */
.hero-image,
.contact-image,
.service-image,
.about-image,
.afloat-image,
.energy-hero-image,
.case-study-image,
.energy-devices-image,
.certificate-image {
  background-size: cover !important;
  background-position: center !important;
  background-repeat: no-repeat !important;
  background-attachment: scroll !important;
  image-rendering: -webkit-optimize-contrast;
  image-rendering: crisp-edges;
  image-rendering: high-quality;
  image-rendering: optimize-quality;
  -webkit-backface-visibility: hidden;
  -webkit-transform: translateZ(0);
  transform: translateZ(0);
}

/* 基于视口单位的响应式背景 */
@media (max-width: 1024px) {

  .hero-image,
  .contact-image,
  .about-image,
  .afloat-image {
    background-size: 110% !important;
  }
}

@media (max-width: 768px) {

  .hero-image,
  .contact-image,
  .about-image,
  .afloat-image {
    background-size: 120% !important;
  }
}

@media (max-width: 480px) {

  .hero-image,
  .contact-image,
  .about-image,
  .afloat-image {
    background-size: 130% !important;
  }
}

/* 基于字体大小的响应式背景调整 */
@media (min-resolution: 2dppx) {

  .hero-image,
  .contact-image,
  .about-image,
  .afloat-image {
    background-size: 105% !important;
  }
}

/* 高分辨率屏幕优化 */
@media (min-width: 1920px) {

  .hero-image,
  .contact-image,
  .about-image,
  .afloat-image {
    background-size: 95% !important;
  }
}

/* 超宽屏优化 */
@media (min-width: 2560px) {
  body {
    font-size: clamp(16px, 1.5vw, 20px);
  }

  h1,
  h2,
  h3,
  h4,
  h5,
  h6 {
    font-size: clamp(1.5rem, 3vw, 4rem);
  }

  .hero-image,
  .contact-image,
  .about-image,
  .afloat-image {
    background-size: 90% !important;
  }
}

/* 超小屏幕优化 */
@media (max-width: 320px) {
  body {
    font-size: 12px;
  }

  h1,
  h2,
  h3,
  h4,
  h5,
  h6 {
    font-size: 1rem;
  }

  .container,
  .content,
  .section {
    padding: 0.5rem;
  }
}

body {
  font-family: 'Source Han Serif SC', serif;
  background-color: #2a2a2a;
  color: white;
  line-height: 1.6;
  font-size: clamp(14px, 2.5vw, 18px);
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: #000000;
  padding: 1rem 0;
  z-index: 1000;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  height: 112px;
  box-sizing: border-box;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 2rem;
  height: 100%;
}

.nav-logo a {
  text-decoration: none;
  display: inline-block;
}

.nav-logo-image {
  height: 72px;
  width: auto;
  object-fit: contain;
  filter: brightness(0) invert(1);
  transition: opacity 0.3s ease;
}

.nav-logo a:hover .nav-logo-image {
  opacity: 0.8;
}

.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-link {
  color: #ffffff;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: color 0.3s ease;
}

.nav-link:hover {
  color: #4a9eff;
}

/* Hero Section */
.hero {
  margin-top: 112px;
  height: 80vh;
  display: flex;
  align-items: center;
  position: relative;
}

.hero-content {
  width: 100%;
  height: 100%;
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  align-items: center;
}

.hero-image {
  height: 100%;
  position: relative;
  overflow: hidden;
}

.hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-text {
  background-color: #000;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
}

.hero-title {
  position: relative;
  left: -220px;
  top: -84px;
  font-size: 34px;
  font-weight: 700;
  text-align: center;
  line-height: 1.3;
  color: white;
}

/* Clients Section */
.clients-section {
  background-color: #2a2a2a;
  padding: 80px 0;
}

.clients-content {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  padding: 0 20px;
}

.clients-image {
  height: 400px;
  border-radius: 10px;
  overflow: hidden;
}

.clients-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.clients-text {
  padding: 40px;
}

.clients-title {
  font-size: 1.8rem;
  font-weight: 700;
  color: white;
  margin-bottom: 20px;
  line-height: 1.3;
}

.clients-description {
  font-size: 1rem;
  color: white;
  line-height: 1.8;
}

/* Partnership Section */
.partnership-section {
  position: relative;
  min-height: 900px;
  overflow: hidden;
}

.partnership-bg {
  position: absolute;
  top: 100px;
  left: 0;
  width: 100%;
  height: calc(100% - 100px);
  object-fit: cover;
  z-index: 1;
}

.partnership-content {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  min-height: 900px;
  padding: 40px 20px;
  text-align: center;
}

.partnership-text {
  font-size: 1.2rem;
  color: #2a2a2a;
  font-weight: 500;
  text-shadow: none;
  max-width: none;
  line-height: 1.6;
  background-color: white;
  padding: 20px 0;
  width: 100vw;
  margin-left: calc(-50vw + 50%);
  margin-right: calc(-50vw + 50%);
  text-align: center;
}

/* Contact Section */
.contact-section {
  padding: 6rem 0;
  background-color: #2a2a2a;
  position: relative;
}

.contact-section::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, transparent, #ffffff, transparent);
}

.contact-section::after {
  content: '';
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, transparent, #ffffff, transparent);
}

.contact-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.contact-title {
  font-family: 'Source Han Serif SC', serif;
  font-size: 2rem;
  font-weight: 700;
  color: #ffffff;
  text-align: center;
  margin-bottom: 1rem;
  line-height: 1.3;
}

.contact-divider {
  width: 60px;
  height: 2px;
  background: #ffffff;
  margin: 0 auto 3rem auto;
}

.contact-content {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 2rem;
  align-items: center;
}

.contact-left {
  position: relative;
}

.contact-image {
  position: relative;
  border-radius: 0;
  overflow: hidden;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
}


.contact-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(0, 0, 0, 0.7) 0%, rgba(0, 0, 0, 0.3) 100%);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 2rem;
}

.contact-services {
  text-align: center;
  color: #ffffff;
  margin-bottom: 2rem;
}

.contact-services p {
  font-size: 1.1rem;
  color: #ffffff;
  margin-bottom: 0.5rem;
  line-height: 1.6;
}

.contact-logo {
  margin-top: 7rem;
}

.logo-image {
  max-width: 280px;
  max-height: 112px;
  object-fit: contain;
  filter: brightness(0) invert(1);
  display: block;
  margin: 0 auto;
}

.contact-right {
  padding: 2rem 2rem 2rem 6rem;
}

.contact-info {
  margin-bottom: 2rem;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.contact-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: #ffffff;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 0.25rem;
}

.contact-icon {
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: #ffffff;
  flex-shrink: 0;
  border: 2px solid #ffffff;
  border-radius: 50%;
}

.contact-item span {
  color: #ffffff;
  font-size: 1.1rem;
  font-weight: 500;
  line-height: 1.4;
}

.contact-footer {
  color: #ffffff;
  font-size: 0.8rem;
  font-weight: 500;
  white-space: nowrap;
  text-align: center;
  padding: 1.5rem;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Image Styles */
img {
  border: none;
  outline: none;
}

/* Responsive Design */
@media (max-width: 1024px) {

  .hero-content,
  .clients-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .nav-links {
    flex-direction: column;
    gap: 15px;
  }

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

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

  .nav-container {
    flex-direction: column;
    gap: 1rem;
  }

  .contact-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .contact-title {
    font-size: 1.8rem;
  }

  .contact-image img {
    height: 350px;
  }

  .contact-overlay {
    padding: 1.5rem;
  }

  .contact-services p {
    font-size: 1rem;
  }

  .logo-image {
    max-width: 210px;
    max-height: 84px;
  }

  .contact-right {
    padding: 1rem;
  }

  .contact-item {
    gap: 0.8rem;
    margin-bottom: 1.5rem;
  }

  .contact-icon {
    width: 35px;
    height: 35px;
    font-size: 1rem;
    border: 2px solid #ffffff;
    border-radius: 50%;
  }

  .contact-footer {
    font-size: 0.7rem;
  }
}

@media (max-width: 768px) {
  .contact-container {
    padding: 0 1rem;
  }

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

  .contact-image img {
    height: 300px;
  }

  .contact-overlay {
    padding: 1rem;
  }

  .contact-services p {
    font-size: 0.9rem;
  }

  .logo-image {
    max-width: 168px;
    max-height: 72px;
  }

  .contact-right {
    padding: 1rem;
  }

  .contact-item {
    gap: 0.5rem;
    margin-bottom: 1rem;
  }

  .contact-icon {
    width: 30px;
    height: 30px;
    font-size: 0.9rem;
    border: 2px solid #ffffff;
    border-radius: 50%;
  }

  .contact-footer {
    font-size: 0.6rem;
  }
}