/* ===== 手机端导航按钮 ===== */
.ydd_btn {
  width: 44px;
  height: 44px;
  position: relative;
  cursor: pointer;
  z-index: 1001;
  padding: 10px;
  margin-top: 8px;
  -webkit-tap-highlight-color: transparent;
  display: block;
}
.ydd_btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: #6B8E81;
  margin: 5px auto;
  transition: all 0.3s ease;
  border-radius: 1px;
}
.ydd_btn.active span { background: #fff; }
.ydd_btn.active .span01 {
  transform: rotate(45deg) translate(5px, 5px);
}
.ydd_btn.active .span02 {
  opacity: 0;
}
.ydd_btn.active .span03 {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ===== 手机端侧边栏菜单 ===== */
.sjdnav {
  position: fixed;
  top: 0;
  right: -80%;
  width: 80%;
  max-width: 320px;
  height: 100%;
  background: #fff;
  z-index: 1000;
  box-shadow: -2px 0 15px rgba(0,0,0,0.15);
  transition: right 0.35s ease;
  overflow-y: auto;
  padding-top: 60px;
  margin: 0;
  border: none;
}
.sjdnav.active { right: 0; }
.sjdnav ul {
  padding: 0;
  margin: 0;
  list-style: none;
}
.sjdnav ul li {
  border-bottom: 1px solid #f0f0f0;
  list-style: none;
  margin: 0;
  padding: 0;
}
.sjdnav ul li a {
  display: block;
  padding: 14px 20px;
  color: #2c3e50;
  text-decoration: none;
  font-size: 15px;
  transition: all 0.2s;
}
.sjdnav ul li a:hover,
.sjdnav ul li a:active {
  background: #f4f7f6;
  color: #6B8E81;
  padding-left: 25px;
}

/* ===== 遮罩层 ===== */
.nav-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.5);
  z-index: 999;
  display: none;
  opacity: 0;
  transition: opacity 0.3s;
}
.nav-overlay.active {
  display: block;
  opacity: 1;
}

@media (max-width: 768px) {
  .logo-box .sousuo { display: none !important; }
  .logo-box .phone { display: none !important; }
}