body {
   font-family: 'Noto Sans SC', sans-serif;
   color: #333;
   background-color: #f8f9fa;
   line-height: 1.6;
   font-size: 16px;
 }

 .header {
   background-color: #fff;
   box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
   position: fixed;
   top: 0;
   left: 0;
   right: 0;
   z-index: 1000;
   transition: all 0.3s ease;
 }

 .banner {
   background: linear-gradient(rgba(0, 0, 0, 0), rgba(0, 0, 0, 0)), url('//css.ccement.com/zhuanti/ccs2022/pc/images/fenghui-2026-banner.jpg');
   background-size: cover;
   background-position: center;
   color: white;
   padding: 120px 0 80px;
   margin-top: 70px;
   position: relative;
 }

 .section {
   padding: 80px 0;
   position: relative;
 }

 .section::after {
   content: '';
   position: absolute;
   bottom: 0;
   left: 10%;
   width: 80%;
   height: 1px;
   background: linear-gradient(to right, transparent, #e74c3c, transparent);
 }

 .section-title {
   position: relative;
   margin-bottom: 40px;
   padding-bottom: 20px;
   font-weight: 700;
   color: #333;
   font-size: 2.5rem;
   text-align: center;
 }

 .section-title::after {
   content: '';
   position: absolute;
   bottom: 0;
   left: 50%;
   transform: translateX(-50%);
   width: 100px;
   height: 4px;
   background: linear-gradient(to right, #e74c3c, #f39c12);
   border-radius: 2px;
 }

 .highlight {
   color: #e74c3c;
   font-weight: 600;
 }

 .btn-primary {
   background: linear-gradient(135deg, #e74c3c, #c0392b);
   color: white;
   padding: 14px 35px;
   border-radius: 30px;
   font-weight: 600;
   transition: all 0.3s ease;
   display: inline-block;
   box-shadow: 0 4px 15px rgba(231, 76, 60, 0.2);
   position: relative;
   overflow: hidden;
 }

 .btn-primary::before {
   content: '';
   position: absolute;
   top: 0;
   left: -100%;
   width: 100%;
   height: 100%;
   background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
   transition: all 0.6s ease;
 }

 .btn-primary:hover {
   transform: translateY(-3px);
   box-shadow: 0 8px 25px rgba(231, 76, 60, 0.4);
 }

 .btn-primary:hover::before {
   left: 100%;
 }

 .card {
   background-color: white;
   border-radius: 12px;
   box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
   padding: 30px;
   transition: all 0.4s ease;
   margin-bottom: 30px;
   color: #333;
   position: relative;
   overflow: hidden;
 }

 .card::before {
   content: '';
   position: absolute;
   top: 0;
   left: 0;
   width: 100%;
   height: 5px;
   background: linear-gradient(to right, #e74c3c, #f39c12);
 }

 .card:hover {
   transform: translateY(-8px);
   box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
 }

 .footer {
   background-color: #0F2441;
   color: white;
   padding: 80px 0 40px;
   position: relative;
   overflow: hidden;
 }

 .footer::before {
   content: '';
   position: absolute;
   top: 0;
   left: 0;
   right: 0;
   height: 1px;
   background-color: #e74c3c;
 }

 .footer-link:hover {
   color: #FFC4B3;
 }

 .footer-title {
   font-size: 20px;
   font-weight: 600;
   margin-bottom: 25px;
   color: white;
   position: relative;
   padding-bottom: 15px;
 }

 .footer-title::after {
   content: '';
   position: absolute;
   bottom: 0;
   left: 0;
   width: 50px;
   height: 3px;
   background: linear-gradient(to right, #e74c3c, #f39c12);
 }

 .footer-link {
   color: #adb5bd;
   transition: all 0.3s ease;
   display: block;
   margin-bottom: 12px;
   position: relative;
   padding-left: 20px;
 }

 .footer-link::before {
   content: '→';
   position: absolute;
   left: 0;
   color: #e74c3c;
   transition: all 0.3s ease;
 }

 .footer-link:hover {
   color: white;
   padding-left: 25px;
 }

 .footer-link:hover::before {
   left: 5px;
 }

 .copyright {
   text-align: center;
   padding-top: 40px;
   margin-top: 40px;
   border-top: 1px solid rgba(255, 255, 255, 0.1);
   color: #adb5bd;
   font-size: 14px;
 }

 .nav-link {
   position: relative;
   color: #333;
   font-weight: 500;
   transition: all 0.3s ease;
   padding: 8px 0px;
   border-radius: 4px;
 }

 .nav-link:hover {
   color: #e74c3c;
   background-color: rgba(231, 76, 60, 0.05);
 }

 .nav-link::after {
   content: '';
   position: absolute;
   bottom: -2px;
   left: 50%;
   transform: translateX(-50%);
   width: 0;
   height: 2px;
   background: linear-gradient(to right, #e74c3c, #f39c12);
   transition: all 0.3s ease;
 }

 .nav-link:hover::after {
   width: 80%;
 }

 .back-to-top {
   position: fixed;
   bottom: 30px;
   right: 30px;
   width: 50px;
   height: 50px;
   border-radius: 50%;
   background: linear-gradient(135deg, #e74c3c, #c0392b);
   color: white;
   display: flex;
   align-items: center;
   justify-content: center;
   cursor: pointer;
   opacity: 0;
   visibility: hidden;
   transition: all 0.3s ease;
   box-shadow: 0 4px 15px rgba(231, 76, 60, 0.3);
   z-index: 999;
 }

 .back-to-top.visible {
   opacity: 1;
   visibility: visible;
 }

 .back-to-top:hover {
   transform: translateY(-5px);
   box-shadow: 0 8px 25px rgba(231, 76, 60, 0.4);
 }

 @media (min-width: 769px) {
   .mobile-menu-btn {
     display: none;
   }
 }

 @media (max-width: 768px) {
   .header {
     padding: 10px 0;
   }

   .banner {
     padding: 120px 0 80px;
     margin-top: 60px;
   }

   .section {
     padding: 60px 0;
   }

   .section-title {
     font-size: 2rem;
     margin-bottom: 40px;
   }

   .nav-menu {
     position: fixed;
     top: 70px;
     left: 0;
     right: 0;
     background-color: white;
     box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
     padding: 20px;
     transform: translateY(-150%);
     transition: all 0.3s ease;
     z-index: 999;
     max-height: 80vh;
     overflow-y: auto;
   }

   .nav-menu.active {
     transform: translateY(0);
   }

   .nav-link {
     display: block;
     margin-bottom: 15px;
     padding: 10px 15px;
   }

   .btn-primary,
   .btn-outline {
     display: block;
     width: 100%;
     text-align: center;
     margin-bottom: 15px;
     padding: 14px 20px;
   }

   .card {
     padding: 25px;
   }

   /* 隐藏移动端菜单按钮 */
   .mobile-menu-btn {
     display: none !important;
   }

   /* 移动端隐藏footer */
   .footer {
     display: none;
   }
 }

 @media (max-width: 480px) {
   .banner {
     padding: 100px 0 60px;
   }

   .section {
     padding: 40px 0;
   }

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

   .card {
     padding: 20px;
   }
 }

 /* 下载页面特有样式 */
 .download-section {
   background-color: white;
   border-radius: 15px;
   padding: 40px;
   box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
   margin-bottom: 40px;
 }

 .login-form {
   display: flex;
   gap: 15px;
   margin-bottom: 40px;
   align-items: center;
   flex-wrap: wrap;
 }

 .login-input {
   flex: 1;
   min-width: 300px;
   padding: 14px 20px;
   border: 2px solid #e9ecef;
   border-radius: 30px;
   font-size: 16px;
   transition: all 0.3s ease;
 }

 .login-input:focus {
   outline: none;
   border-color: #e74c3c;
   box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.1);
 }

 .news-grid {
   display: grid;
   /* grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); */
   grid-template-columns: repeat(1, 1fr);
   gap: 20px;
 }

 .news-item {
   border-bottom: 1px solid #e9ecef;
   position: relative;
   transition: all 0.3s ease;
 }

 .news-item:hover {
   padding-left: 10px;
   color: #e74c3c;
 }

 .news-item::before {
   content: '•';
   color: #e74c3c;
   font-weight: bold;
   margin-right: 10px;
 }

 .hot-badge {
   display: inline-block;
   background: linear-gradient(135deg, #ff6b6b, #ee5a24);
   color: white;
   padding: 2px 8px;
   border-radius: 10px;
   font-size: 12px;
   font-weight: bold;
   margin-left: 8px;
   animation: pulse 2s infinite;
   vertical-align: middle;
 }

 @keyframes pulse {
   0% {
     transform: scale(1);
     opacity: 1;
   }

   50% {
     transform: scale(1.1);
     opacity: 0.8;
   }

   100% {
     transform: scale(1);
     opacity: 1;
   }
 }

 .news-column {
   background-color: #f8f9fa;
   border-radius: 10px;
   padding: 20px;
 }

 .column-title {
   font-size: 18px;
   font-weight: 600;
   margin-bottom: 20px;
   color: #333;
   position: relative;
   padding-bottom: 10px;
 }

 .column-title::after {
   content: '';
   position: absolute;
   bottom: 0;
   left: 0;
   width: 40px;
   height: 3px;
   background: linear-gradient(to right, #e74c3c, #f39c12);
 }

@media (min-width: 980px) {
  .news-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}