/* banner样式 */
    /* ===== Banner 图片背景样式 ===== */
.mh-bannerx {
  position: relative;
  width: 100%;
  height: 650px; /* 保持原高度 */
  overflow: hidden;
}

.mh-bannerx-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  z-index: 1;
  transform: scale(1.05);
  transition: transform 6s ease;
}
.mh-bannerx:hover .mh-bannerx-bg {
  transform: scale(1.1);
}

/* 遮罩层 */
.mh-bannerx-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom right,
    rgba(0, 20, 60, 0.45),
    rgba(0, 0, 0, 0.35)
  );
  z-index: 2;
}

/* 内容区 */
.mh-bannerx-content {
  position: relative;
  z-index: 3;
  text-align: center;
  color: #fff;
  top: 50%;
  transform: translateY(-50%);
  padding: 0 20px;
}

.mh-bannerx-title {
  font-size: clamp(30px, 4.5vw, 56px);
  font-weight: 800;
  margin-bottom: 18px;
  line-height: 1.3;
  letter-spacing: 1px;
}

.mh-bannerx-subtitle {
  font-size: clamp(15px, 1.8vw, 20px);
  margin-bottom: 30px;
  line-height: 1.6;
  opacity: 0.9;
}

/* 按钮 */
.mh-bannerx-btn {
  background: linear-gradient(90deg, #0077ff, #00c6ff);
  color: #fff;
  padding: 12px 36px;
  border-radius: 30px;
  font-weight: 600;
  font-size: 16px;
  text-decoration: none;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(0, 123, 255, 0.3);
}
.mh-bannerx-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 25px rgba(0, 123, 255, 0.45);
}

/* 响应式 */
@media (max-width: 768px) {
  .mh-bannerx {
    height: 480px;
  }
  .mh-bannerx-title {
    font-size: 26px;
  }
  .mh-bannerx-subtitle {
    font-size: 14px;
  }
  .mh-bannerx-btn {
    padding: 10px 26px;
    font-size: 14px;
  }
}
/* banner样式结束 */
        /* ========== 通用样式 ========== */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: "Microsoft YaHei", sans-serif;
            line-height: 1.6;
            color: #333;
        }
        
        /* 通用按钮样式 */
        .common-btn {
            background: linear-gradient(90deg, #0056b3, #0077ff);
            color: #fff;
            border: none;
            padding: 10px 26px;
            border-radius: 25px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 3px 10px rgba(0, 86, 179, 0.3);
            display: inline-block;
            text-decoration: none;
            text-align: center;
        }
        
        .common-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 18px rgba(0, 86, 179, 0.4);
        }
        
        /* 通用卡片样式 */
        .common-card {
            background: #fff;
            border-radius: 14px;
            box-shadow: 0 6px 15px rgba(0, 0, 0, 0.08);
            transition: all 0.35s ease;
            overflow: hidden;
        }
        
        .common-card:hover {
            transform: translateY(-6px);
            box-shadow: 0 12px 25px rgba(0, 86, 179, 0.15);
        }
        
        /* 通用标题样式 */
        .section-title {
            font-size: 34px;
            font-weight: 800;
            color: #0a1f44;
            margin-bottom: 10px;
        }
        
        .section-subtitle {
            font-size: 15px;
            color: #2b8bff;
            font-weight: 600;
            letter-spacing: 1.2px;
            margin-bottom: 18px;
        }
        
        .section-desc {
            color: #444;
            font-size: 16px;
            line-height: 1.7;
            margin-bottom: 60px;
        }
        
        /* 通用容器样式 */
        .section-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            text-align: center;
        }
        
        /* 通用弹窗样式 */
        .wechat-modal {
            display: none;
            position: fixed;
            inset: 0;
            z-index: 9999;
            background: rgba(255, 255, 255, 0.3);
            backdrop-filter: blur(6px);
            justify-content: center;
            align-items: center;
            /* animation: fadeIn 0.3s ease; */
        }
        
        .wechat-box {
            position: relative;
            background: rgba(255, 255, 255, 0.92);
            border: 1px solid rgba(0, 123, 255, 0.3);
            box-shadow: 0 0 20px rgba(0, 123, 255, 0.2);
            border-radius: 12px;
            padding: 30px 40px;
            text-align: center;
            width: 320px;
        }
        
        .wechat-close {
            position: absolute;
            top: 10px;
            right: 18px;
            font-size: 24px;
            color: #666;
            cursor: pointer;
            transition: 0.3s;
        }
        
        .wechat-close:hover {
            color: #007bff;
        }
        
        .wechat-title {
            font-size: 20px;
            color: #084d8c;
            margin-bottom: 10px;
        }
        
        .wechat-tip {
            color: #333;
            font-size: 14px;
            margin-bottom: 15px;
        }
        
        .wechat-qrcode img {
            width: 180px;
            border-radius: 6px;
            border: 1px solid rgba(0, 0, 0, 0.1);
        }
        
        @keyframes fadeIn {
            from { opacity: 0; transform: scale(0.9); }
            to { opacity: 1; transform: scale(1); }
        }
        
        /* ========== 模块1：B2B视频制作服务 ========== */
        .mhb2b-section {
            padding: 50px 20px;
            background: linear-gradient(180deg, #ffffff 0%, #f7f9fc 100%);
        }
        
        .mhb2b-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        
        .mhb2b-card {
            background: #fff;
            border-radius: 14px;
            padding: 45px 28px;
            transition: all 0.35s ease;
            box-shadow: 0 4px 20px rgba(0,0,0,0.06);
            border-top: 3px solid transparent;
        }
        
        .mhb2b-card:hover {
            border-top: 3px solid #2b8bff;
            transform: translateY(-8px);
            box-shadow: 0 10px 30px rgba(43,139,255,0.15);
        }
        
        .mhb2b-icon {
            width: 68px;
            height: 68px;
            background: linear-gradient(135deg, #e6f0ff, #f2f7ff);
            border-radius: 14px;
            margin: 0 auto 22px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .mhb2b-icon img {
            width: 38px;
            height: 38px;
            filter: invert(32%) sepia(94%) saturate(512%) hue-rotate(192deg) brightness(93%) contrast(92%);
        }
        
        .mhb2b-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: #0b2345;
            margin-bottom: 14px;
        }
        
        .mhb2b-card p {
            font-size: 15px;
            color: #555;
            line-height: 1.7;
            padding: 0 4px;
        }
        
        /* ========== 模块2：短视频制作套餐 ========== */
        .mhpkg-section {
            background: #f5f6f8;
            padding: 50px 20px;
        }
        
        .mhpkg-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        
        .mhpkg-card {
            background: #fff;
            border-radius: 14px;
            padding: 40px 30px;
            text-align: left;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            transition: all 0.3s ease;
        }
        
        .mhpkg-card:hover {
            transform: translateY(-6px);
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
        }
        
        .mhpkg-card h3 {
            font-size: 20px;
            font-weight: 700;
            color: #0b2345;
            margin-bottom: 10px;
        }
        
        .mhpkg-tagline {
            font-size: 15px;
            color: #666;
            margin-bottom: 18px;
            line-height: 1.5;
        }
        
        .mhpkg-card ul {
            list-style: none;
            padding-left: 0;
            margin-bottom: 25px;
        }
        
        .mhpkg-card ul li {
            position: relative;
            padding-left: 20px;
            font-size: 15px;
            color: #333;
            margin-bottom: 10px;
        }
        
        .mhpkg-card ul li::before {
            content: "✓";
            position: absolute;
            left: 0;
            color: #0077ff;
            font-weight: 700;
        }
        
        /* ========== 模块3：服务保障 ========== */
        .mhsvc-section {
            background: linear-gradient(180deg, #ffffff 0%, #f7faff 100%);
            padding: 50px 20px;
        }
        
        .mhsvc-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
        }
        
        .mhsvc-card {
            background: #fff;
            border-radius: 16px;
            padding: 50px 30px 45px;
            box-shadow: 0 6px 25px rgba(0, 0, 0, 0.06);
            border: 1px solid rgba(0, 119, 255, 0.08);
            transition: all 0.35s ease;
            position: relative;
            overflow: hidden;
        }
        
        .mhsvc-card::before {
            content: "";
            position: absolute;
            inset: 0;
            border-radius: 16px;
            border: 2px solid transparent;
            background: linear-gradient(135deg, rgba(0,119,255,0.4), rgba(0,119,255,0.1)) border-box;
            -webkit-mask: 
                linear-gradient(#fff 0 0) padding-box, 
                linear-gradient(#fff 0 0);
            -webkit-mask-composite: xor;
            mask-composite: exclude;
            opacity: 0;
            transition: opacity 0.35s ease;
        }
        
        .mhsvc-card:hover::before {
            opacity: 1;
        }
        
        .mhsvc-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 12px 35px rgba(0, 119, 255, 0.15);
        }
        
        .mhsvc-icon {
            width: 78px;
            height: 78px;
            background: radial-gradient(circle at 30% 30%, #e8f2ff, #f3f7ff);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            transition: all 0.4s ease;
            box-shadow: inset 0 0 10px rgba(0, 119, 255, 0.08);
        }
        
        .mhsvc-card:hover .mhsvc-icon {
            transform: scale(1.1);
            box-shadow: 0 0 20px rgba(0, 119, 255, 0.35), inset 0 0 12px rgba(0, 119, 255, 0.15);
            background: radial-gradient(circle at 40% 40%, #d9ecff, #eaf3ff);
        }
        
        .mhsvc-icon img {
            width: 36px;
            height: 36px;
            filter: invert(35%) sepia(90%) saturate(450%) hue-rotate(195deg) brightness(95%) contrast(92%);
        }
        
        .mhsvc-card h3 {
            font-size: 20px;
            font-weight: 700;
            color: #0b2345;
            margin-bottom: 14px;
        }
        
        .mhsvc-card p {
            font-size: 15px;
            color: #555;
            line-height: 1.7;
        }
        
        /* ========== 模块4：我们的核心优势 ========== */
        .mhadv-section {
            background: linear-gradient(180deg, #f7faff 0%, #eef4ff 100%);
            padding: 50px 20px;
        }
        
        .mhadv-head {
            text-align: center;
            margin-bottom: 60px;
        }
        
        .mhadv-body {
            display: flex;
            align-items: stretch;
            justify-content: space-between;
            gap: 60px;
        }
        
        .mhadv-text {
            flex: 1.1;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        
        .mhadv-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        
        .mhadv-item {
            display: flex;
            align-items: flex-start;
            gap: 18px;
            background: #fff;
            border-radius: 14px;
            padding: 18px 20px;
            box-shadow: 0 4px 18px rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
        }
        
        .mhadv-item:hover {
            transform: translateX(6px);
            box-shadow: 0 8px 25px rgba(0, 86, 179, 0.15);
        }
        
        .mhadv-item img {
            width: 26px;
            height: 26px;
            margin-top: 4px;
            filter: invert(35%) sepia(95%) saturate(450%) hue-rotate(190deg) brightness(95%) contrast(90%);
        }
        
        .mhadv-item h4 {
            font-size: 17px;
            font-weight: 700;
            color: #0b2345;
            margin-bottom: 4px;
        }
        
        .mhadv-item p {
            font-size: 15px;
            color: #555;
            line-height: 1.6;
        }
        
        .mhadv-media {
            flex: 1;
            position: relative;
            border-radius: 14px;
            overflow: hidden;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .mhadv-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
            filter: brightness(1.05);
        }
        
        .mhadv-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to bottom right, rgba(0, 86, 179, 0.25), rgba(0, 0, 0, 0.2));
        }
        
        /* ========== 响应式布局 ========== */
        @media (max-width: 992px) {
            .mhb2b-grid, .mhsvc-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .mhpkg-grid {
                grid-template-columns: 1fr;
            }
            
            .mhpkg-card {
                text-align: center;
            }
            
            .mhpkg-card ul li {
                text-align: left;
                display: inline-block;
            }
            
            .mhadv-body {
                flex-direction: column-reverse;
                align-items: stretch;
                gap: 40px;
            }
            
            .mhadv-media {
                width: 100%;
                height: 340px;
            }
            
            .section-title {
                font-size: 26px;
            }
        }
        
        @media (max-width: 576px) {
            .mhb2b-grid, .mhsvc-grid {
                grid-template-columns: 1fr;
            }
            
            .mhb2b-card, .mhsvc-card {
                padding: 35px 20px;
            }
        }
        /* =========================================================
   📱 优化模块1「B2B企业视频制作」与模块3「服务保障」
   移动端卡片比例 & 内边距调整
========================================================= */
@media (max-width: 768px) {

  /* 模块1：适用于B2B企业的视频制作 */
  .mhb2b-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px; /* 调整间距 */
    padding: 0 8px; /* 整体靠近屏幕边缘 */
  }

  .mhb2b-card {
    padding: 20px 10px; /* 收紧内边距 */
    text-align: center;
    border-radius: 12px;
  }

  .mhb2b-card h3 {
    font-size: 15px;
    margin-bottom: 8px;
  }

  .mhb2b-card p {
    font-size: 13px;
    line-height: 1.5;
  }

  /* 最后一个卡片居中显示 */
  .mhb2b-card:last-child:nth-child(odd) {
    grid-column: 1 / -1;
    width: 86%;
    margin: 0 auto;
  }

  /* 模块3：服务保障 */
  .mhsvc-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
    padding: 0 8px;
  }

  .mhsvc-card {
    padding: 22px 12px;
    text-align: center;
    border-radius: 12px;
  }

  .mhsvc-card h3 {
    font-size: 15px;
    margin-bottom: 8px;
  }

  .mhsvc-card p {
    font-size: 13px;
    line-height: 1.5;
  }

  /* 最后一个独占整行 */
  .mhsvc-card:last-child:nth-child(odd) {
    grid-column: 1 / -1;
    width: 86%;
    margin: 0 auto;
  }
}