* {
    margin: 0;
    padding: 0;
}
.page_default {
    text-align: center;
    width: 99%;
    height: auto;
    margin: 0 auto;
}
.default_top_img {
    width: 100%;
    height: auto;
    margin: 0 auto;
}
.default_top_img img {
    width: 100%;
    height: 500px;
    object-fit: fill;
}
.default_menu {
    text-align: center;
    width: auto;
    height: 35px;
    line-height: 1.8;
    color: #00ff4c;
    transform: translateY(-35px);
}

.default_menu ul {
    display: flex;
    justify-content: center;
    gap: 6px;
}

.default_menu li {
    width: 90px;
    height: 35px;
    list-style-type: none;
    /* 高透水晶深蓝渐变，玻璃通透分层 */
    background: linear-gradient(180deg, rgba(12, 65, 130, 0.75), rgba(4, 32, 70, 0.85));
    border: 1px solid rgba(0, 210, 255, 0.55);
    border-radius: 18px;
    /* 多层立体阴影：底层投影+内部顶部高光+内部底部暗调 */
    box-shadow: 
        0 4px 12px rgba(0, 90, 180, 0.45),
        0 0 6px rgba(0, 170, 255, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.22),
        inset 0 -1px 0 rgba(0, 0, 0, 0.25);
    transition: all 0.3s cubic-bezier(0.2, 0, 0.2, 1);
    backdrop-filter: blur(2px);
}

/* 第四个菜单加宽不变 */
.default_menu li:nth-child(7) {
    width: 120px;
}

/* 首项深色水晶基底 */
.default_menu li:first-child {
    background: linear-gradient(180deg, rgba(6, 35, 70, 0.8), rgba(2, 18, 40, 0.9));
    border-color: rgba(0, 190, 255, 0.4);
}

/* Hover 水晶上浮+霓虹扩散光效，科技感拉满 */
.default_menu li:hover {
    transform: translateY(-3px) scale(1.03);
    border-color: rgba(0, 230, 255, 0.9);
    box-shadow: 
        0 7px 18px rgba(0, 130, 240, 0.55),
        0 0 16px rgba(0, 200, 255, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.3),
        inset 0 -1px 0 rgba(0, 0, 0, 0.15);
}

.default_menu a {
    font-size: 18px;
    letter-spacing: 4pt;
    color: #d0f0ff;
    text-decoration: none;
    /* 多层文字辉光 */
    text-shadow: 
        0 0 3px rgba(0, 200, 255, 0.6),
        0 0 6px rgba(0, 160, 255, 0.3);
    display: block;
    height: 100%;
    line-height: 35px;
    transition: all 0.3s ease;
}

.default_menu li:hover a {
    color: #ffffff;
    text-shadow: 
        0 0 6px rgba(0, 220, 255, 0.9),
        0 0 12px rgba(0, 190, 255, 0.6),
        0 0 18px rgba(0, 150, 255, 0.35);
}

/* 搜索框区域美化，和菜单风格统一 */
.search {
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 45px 0;
    width: 100%;
    transform: translateY(10px);
}

.search input[type="text"] {
    width: 48%;
    height: 45px;
    line-height: 45px;
    font-size: 18px;
    border-right: none;
    background: linear-gradient(180deg, #f0f8ff, #e6f3ff);
    border-radius: 24px 0 0 24px;
    border: 1px solid rgba(0, 120, 200, 0.3);
    padding: 0 15px;
    letter-spacing: 2px;
    box-sizing: border-box;
    box-shadow: inset 0 1px 3px rgba(0, 60, 120, 0.1);
    transition: all 0.2s;
}

.search input[type="text"]:focus {
    background: linear-gradient(180deg, #e0f0ff, #d1e8ff);
    border-color: rgba(0, 180, 255, 0.6);
    outline: none;
    box-shadow: 0 0 8px rgba(0, 160, 255, 0.3),
                inset 0 1px 3px rgba(0, 60, 120, 0.15);
}

.search button {
    height: 45px;
    padding: 0 22px;
    font-size: 18px;
    color: #ffffff;
    border: 1px solid rgba(0, 120, 200, 0.3);
    border-left: none;
    border-radius: 0 18px 18px 0;
    cursor: pointer;
    box-sizing: border-box;
    background: linear-gradient(180deg, #0a4b96, #073670);
    box-shadow: 0 2px 6px rgba(0, 80, 160, 0.3);
    transition: all 0.25s ease;
    text-shadow: 0 0 3px rgba(0, 180, 255, 0.5);
}

.search button:hover {
    background: linear-gradient(180deg, #0c5aa8, #084280);
    box-shadow: 0 4px 10px rgba(0, 120, 220, 0.4);
    transform: translateY(-1px);
}