body {
    font-family: 'Segoe UI', 'Microsoft YaHei', Arial, sans-serif;
    background: linear-gradient(120deg, #FFD600 0%, #009FE8 100%);
    color: #e6eaf3;
    margin: 0;
    padding: 0;
    min-height: 100vh;
}
nav {
    background: linear-gradient(90deg, rgba(255,214,0,0.92) 0%, rgba(0,159,232,0.92) 100%);
    padding: 16px 24px;
    box-shadow: 0 2px 8px #0002;
}
nav a {
    color: #23263a;
    margin-right: 18px;
    text-decoration: none;
    font-weight: 600;
    letter-spacing: 0.5px;
    transition: color 0.2s;
}
nav a:hover {
    color: #009FE8;
    text-shadow: 0 2px 8px #fff6;
}
.card {
    background: #f7f9fa;
    border-radius: 14px;
    box-shadow: 0 2px 16px #0002;
    padding: 32px 36px;
    margin: 36px auto;
    max-width: 1100px;
}
h2, h3, h4 {
    color: #009FE8;
    font-weight: 600;
}
form {
    margin: 18px 0 12px 0;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px;
}
input[type="text"], input[type="date"], select {
    background: #fff;
    color: #222;
    border: 1.5px solid #FFD600;
    border-radius: 5px;
    padding: 6px 10px;
    outline: none;
    font-size: 15px;
    margin-right: 6px;
    transition: border 0.2s;
}
input[type="text"]:focus, input[type="date"]:focus, select:focus {
    border-color: #009FE8;
}
button {
    background: linear-gradient(90deg, #FFD600 0%, #009FE8 100%);
    color: #181c2f;
    border: none;
    border-radius: 5px;
    padding: 7px 18px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 2px 8px #0002;
    transition: background 0.2s, color 0.2s;
}
button:hover {
    background: linear-gradient(90deg, #009FE8 0%, #FFD600 100%);
    color: #23263a;
}
table {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
    margin-bottom: 18px;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px #0002;
}
th, td {
    padding: 10px 12px;
    border-bottom: 1px solid #e5e7eb;
    text-align: left;
    color: #222;
}
th {
    background: #f5f7fa;
    color: #009FE8;
    font-weight: 600;
}
tr:hover {
    background: #f0f4f8;
}
pre {
    background: #f5f7fa;
    color: #222;
    border-radius: 6px;
    padding: 12px;
    font-size: 15px;
    margin: 10px 0;
    box-shadow: 0 1px 4px #0001;
}
ul, li, div {
    font-size: 15px;
    color: #222;
}
::-webkit-scrollbar {
    width: 8px;
    background: #e5e7eb;
}
::-webkit-scrollbar-thumb {
    background: #cfd8dc;
    border-radius: 4px;
}
.center-search {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 18px;
    margin-bottom: 0;
}
.card-center {
    margin-left: auto;
    margin-right: auto;
    float: none;
} 

/* 下拉菜单样式 */
.dropdown {
    position: relative;
}

.dropdown-toggle {
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 5px;
}

.dropdown-toggle i {
    font-size: 12px;
    transition: transform 0.2s;
}

.dropdown-toggle:hover i {
    transform: rotate(180deg);
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    min-width: 150px;
    z-index: 1000;
    margin-top: 5px;
}

.dropdown-menu.show {
    display: block;
}

.dropdown-item {
    display: block;
    padding: 10px 15px;
    color: #23263a;
    text-decoration: none;
    border-bottom: 1px solid #f0f0f0;
    transition: background-color 0.2s;
}

.dropdown-item:last-child {
    border-bottom: none;
}

.dropdown-item:hover {
    background-color: #f8f9fa;
    color: #009FE8;
}

/* 确保下拉菜单在导航栏中正确显示 */
nav .dropdown {
    display: inline-block;
    vertical-align: middle;
}

nav .dropdown-toggle {
    color: #23263a;
    margin-right: 18px;
    text-decoration: none;
    font-weight: 600;
    letter-spacing: 0.5px;
    transition: color 0.2s;
}

nav .dropdown-toggle:hover {
    color: #009FE8;
    text-shadow: 0 2px 8px #fff6;
}