/* ===== 合生玄科技 PPT 直出网站样式 ===== */
:root {
  --primary: #0d402e;
  --primary-dark: #0a2e20;
  --primary-light: #1a6b4d;
  --accent: #d4af37;
  --text-light: rgba(255, 255, 255, 0.9);
  --text-muted: rgba(255, 255, 255, 0.65);
  --bg-section: #f8f9fa;
  --bg-section-alt: #ffffff;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.12);
}

* {
  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", sans-serif;
  color: #333;
  line-height: 1.6;
  background: #fff;
}

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

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

/* ===== 顶部导航 ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 70px;
  background: rgba(13, 64, 46, 0.98);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 1000;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
}

.header-inner {
  max-width: 1600px;
  height: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.logo img,
.logo picture {
  height: 42px;
  width: auto;
  display: flex;
  align-items: center;
}

.logo-text {
  color: #fff;
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}

.logo-cn {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.logo-en {
  font-size: 11px;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.75);
  letter-spacing: 0.3px;
  white-space: nowrap;
}

.main-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  gap: 4px;
  list-style: none;
}

.nav-list a {
  color: var(--text-light);
  font-size: 14px;
  padding: 8px 12px;
  border-radius: 4px;
  transition: all 0.25s ease;
  white-space: nowrap;
}

.nav-list a:hover,
.nav-list a.active {
  color: #fff;
  background: rgba(255, 255, 255, 0.15);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 26px;
  cursor: pointer;
  padding: 8px;
}

/* ===== 幻灯片区域 ===== */
main {
  padding-top: 70px;
}

.slide-section {
  height: calc(100vh - 70px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 0;
  background: #013728;
  overflow: hidden;
}

.slide-container {
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.slide-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ===== 底部页脚 ===== */
.site-footer {
  background: var(--primary-dark);
  color: var(--text-light);
  padding: 48px 24px 24px;
  font-size: 14px;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 32px;
}

.footer-info p {
  margin-bottom: 8px;
}

.footer-info strong {
  color: #fff;
  font-size: 16px;
}

.footer-beian {
  text-align: right;
}

.footer-beian p {
  margin-bottom: 8px;
}

.footer-beian a {
  color: #7dd3c0;
  transition: color 0.2s;
}

.footer-beian a:hover {
  color: #fff;
  text-decoration: underline;
}

.footer-copyright {
  grid-column: 1 / -1;
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-muted);
}

/* ===== 右上角悬浮电话 ===== */
.phone-float {
  position: fixed;
  top: 80px;
  right: 20px;
  bottom: auto;
  z-index: 999;
  background: var(--primary-light);
  color: #fff;
  padding: 10px 20px;
  border-radius: 50px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
  font-weight: 600;
  font-size: 15px;
  transition: transform 0.2s, background 0.2s;
}

.phone-float:hover {
  transform: translateY(-2px);
  background: var(--primary);
}

.phone-float a {
  color: #fff;
}

/* ===== 幻灯片页码指示器 ===== */
.slide-dots {
  position: fixed;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 998;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.slide-dots a {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(13, 64, 46, 0.25);
  transition: all 0.25s;
}

.slide-dots a.active,
.slide-dots a:hover {
  background: var(--primary-light);
  transform: scale(1.3);
}

/* ===== 响应式适配 ===== */
@media (max-width: 1200px) {
  .nav-list a {
    font-size: 13px;
    padding: 7px 10px;
  }

  .logo-cn {
    font-size: 15px;
  }

  .logo-en {
    font-size: 10px;
  }
}

@media (max-width: 992px) {
  .menu-toggle {
    display: block;
  }

  .nav-list {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: rgba(13, 64, 46, 0.98);
    backdrop-filter: blur(12px);
    flex-direction: column;
    padding: 16px 24px 24px;
    gap: 0;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    max-height: calc(100vh - 70px);
    overflow-y: auto;
  }

  .nav-list.open {
    display: flex;
  }

  .nav-list li {
    width: 100%;
  }

  .nav-list a {
    display: block;
    padding: 12px 16px;
    font-size: 15px;
    border-radius: 6px;
  }

  .slide-dots {
    display: none;
  }

  /* 手机/平板端：用 contain 保证幻灯片内容完整可见 */
  .slide-container img {
    object-fit: contain;
  }

  .phone-float {
    top: 80px;
    right: 16px;
    padding: 9px 16px;
    font-size: 14px;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer-beian {
    text-align: center;
  }
}

@media (max-width: 576px) {
  .site-header {
    height: 60px;
  }

  .header-inner {
    padding: 0 16px;
  }

  .logo img {
    height: 36px;
  }

  .logo-cn {
    font-size: 14px;
  }

  .logo-en {
    font-size: 9px;
  }

  main {
    padding-top: 60px;
  }

  .slide-section {
    height: calc(100vh - 60px);
  }

  .phone-float {
    top: 70px;
    right: 12px;
    padding: 8px 14px;
    font-size: 13px;
  }

  .site-footer {
    padding: 32px 16px 20px;
    font-size: 13px;
  }
}

/* 手机横屏：比例接近16:9，恢复 cover 铺满 */
@media (max-width: 992px) and (orientation: landscape) {
  .slide-container img {
    object-fit: cover;
  }
}