html,
body{
    margin: 0;
    padding: 0;
    font-family: 'Meiryo';
}
ul{
    margin: 0;
    padding: 0;
}
@keyframes shake {
    0%, 45%, 55%, 100% { transform: translateX(0); }
    50% { transform: translateX(-5px); } 
    52% { transform: translateX(5px); }
    54% { transform: translateX(-2px); }
    56% { transform: translateX(0); }
  }
@media screen and (width > 750px) {
    .ideas_page{
        margin-top: 150px;
        padding-bottom: 150px;
    }
    .ideas_page h1{
        text-align: center;margin-bottom: 50px;
    }
    .Community_ideas_content{
        display: flex;
        align-items: flex-start;
        justify-content: center;
        gap: 50px;
        flex-wrap: wrap;
    }
    .Community_ideas_content .item{
        width: 23%;
        border-radius: 10px;
        overflow: hidden;
        box-shadow: 2px 4px 12px #00000018;
        cursor: pointer;
        transition: transform 0.2s ease, box-shadow 0.2s ease, border 0.2s ease;
        padding-bottom: 20px;
    }
    .Community_ideas_content .item:hover{
        box-shadow: 2px 4px 12px #00000025;
        transform: translateY(-2px);
    }
    .Community_ideas_content .item img{
        width: 100%;
    }
    .Community_ideas_content .item .text{
        padding: 10px 20px;
    }
    .Community_ideas_content .item .text p{
        margin: 0;
    }
    .Community_ideas_content .item .text .title{
        font-weight: 600;
        margin-bottom: 10px;
    }
    .Community_ideas_content .item .text .dec{
        font-size: 14px;
        margin-bottom: 10px;
        display: -webkit-box;
        -webkit-line-clamp: 3;
        -webkit-box-orient: vertical;
        overflow: hidden;
        text-overflow: ellipsis;
        color: #00000095;
    }
    .Community_ideas_content .item .text .name,.Community_ideas_content .item .text .time{
        text-align: right;
        margin-right: 5%;
        font-size: 13px;
        color: #00000085;
        margin-bottom: 8px;
    }

    .menu_top{
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        z-index: 2;
       }
       .menu_top ul{
        background: linear-gradient(
        to bottom,
        #00000060 0%,
        #00000060 70%,
        rgba(0, 0, 0, 0.1) 100%
        );
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 20px;
        padding: 20px 0;
        width: 100%;
        margin: 0 auto;
       }
       .menu_top ul li{
        color: #ffffff;
        list-style: none;
        padding:10px 20px;
        position: relative;
        border-radius: 8px;
       }
       .menu_top ul li a{
        color: #ffffff;
        text-decoration: none;
       }
       .menu_top ul li:hover{
        background: #2e2e2e;
       }
       .menu_top ul li:hover a{
        color: #ffffff !important;
       }
       .menu_top.active,.menu_top.active ul{
        background: #ffffff !important;
       }
       .menu_top.active a{
        color: #000000 !important;
       }
       .go_url.black{
        margin: 30px auto 0;
        background: #000000;
        display: block;
        padding: 20px 30px;
        color: #ffffff;
        font-size: 24px;
        text-align: center;
        border-radius: 20px;
        width: 10%;
    }
    .go_url.black:hover{
        background: #00000085;
        color: #ffffff;
    }
    .menu_top{
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        z-index: 2;
       }
       .menu_top ul{
        background: linear-gradient(
        to bottom,
        #00000060 0%,
        #00000060 70%,
        rgba(0, 0, 0, 0.1) 100%
        );
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 20px;
        padding: 20px 0;
        width: 20%;
        margin: 0 auto;
       }
       .menu_top ul li{
        color: #ffffff;
        list-style: none;
        padding:10px 20px;
       }
       .menu_top ul li a{
        color: #ffffff;
        text-decoration: none;
       }
       .menu_top ul li:hover{
        background: #2e2e2e;
        border-radius: 8px;
       }
       .menu_top ul li:hover a{
        color: #ffffff !important;
       }
       .chat_window{
        position: fixed;
        bottom: 30px;
        right: 30px;
        padding: 10px 30px;
        background: #000000;
        color: #ffffff;
        border-radius: 20px;
        border:1px solid #999;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 20px;
        cursor: pointer;
       }
       .chat_window img{
        width: 80px;
        border-radius: 50%;
       }
       .chat_window p{margin: 0 0 5px;}
       .chat_window:hover{
        background: #ffffff;
        color: #000000;
       }
}
@media screen and (width < 750px) {
    .ideas_page{
        margin-top: 100px;
        padding:0 20px 50px;
    }
    .ideas_page h1{
        font-size: 32px;
        text-align: center;margin-bottom: 25px;
    }
    .Community_ideas_content .item{
        border-radius: 10px;
        overflow: hidden;
        box-shadow: 2px 4px 12px #00000018;
        cursor: pointer;
        transition: transform 0.2s ease, box-shadow 0.2s ease, border 0.2s ease;
        padding-bottom: 20px;
        margin-bottom: 20px;
    }
    .Community_ideas_content .item img{
        width: 100%;
    }
    .Community_ideas_content .item .text{
        padding: 10px 20px;
    }
    .Community_ideas_content .item .text p{
        margin: 0;
    }
    .Community_ideas_content .item .text .title{
        font-weight: 600;
        margin-bottom: 10px;
    }
    .Community_ideas_content .item .text .dec{
        font-size: 14px;
        margin-bottom: 10px;
        display: -webkit-box;
        -webkit-line-clamp: 4;
        -webkit-box-orient: vertical;
        overflow: hidden;
        text-overflow: ellipsis;
        color: #00000095;
    }
    .Community_ideas_content .item .text .name,.Community_ideas_content .item .text .time{
        text-align: right;
        margin-right: 5%;
        font-size: 13px;
        color: #00000085;
        margin-bottom: 8px;
    }
    .go_url.black{
        margin: 40px auto 0;
        background: #000000;
        display: block;
        padding: 10px 15px;
        color: #ffffff;
        font-size: 15px;
        text-align: center;
        border-radius: 20px;
        width: 50%;
    }
    .menu_top{
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        z-index: 9999;
       }
       .menu_top ul{
        background: linear-gradient(
        to bottom,
        #00000060 0%,
        #00000060 70%,
        rgba(0, 0, 0, 0.1) 100%
        );
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 20px;
        padding: 10px 0;
        width: 100%;
        margin: 0 auto;
       }
       .menu_top ul li{
        color: #ffffff;
        list-style: none;
       }
       .menu_top ul li a{
        color: #ffffff;
        text-decoration: none;
       }
       .menu_top.active,.menu_top.active ul{
        background: #ffffff !important;
       }
       .menu_top.active a{
        color: #000000 !important;
       }
       .chat_window{
        position: fixed;
        bottom: 15%;
        right: 20px;
        padding: 10px;
        background: #000000;
        color: #ffffff;
        border-radius: 20px;
        border:1px solid #999;
        z-index: 3;
        text-align: center;
        cursor: pointer;
        animation: shake 10s linear infinite;
       }
       .chat_window img{
        width: 40px;
        border-radius: 50%;
       }
       .chat_window p{margin: 0 0 5px;font-size: 12px;}
       .chat_bottom_go_url{font-size: 12px;}
}