body {
    margin: 0;
    background: #f5f7fb;
    color: #1f2937;
    font-family: Arial, "Microsoft YaHei", sans-serif;
}

.shell {
    max-width: 1040px;
    margin: 0 auto;
    padding: 32px 20px;
}

.panel, .card {
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    padding: 18px;
    box-shadow: 0 1px 2px rgba(15, 23, 42, .04);
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 12px;
    margin: 18px 0;
}

.card strong {
    display: block;
    font-size: 28px;
}

label {
    display: block;
    margin: 12px 0;
}

input, textarea {
    display: block;
    width: 100%;
    box-sizing: border-box;
    margin-top: 6px;
    padding: 10px;
    border: 1px solid #d1d5db;
    border-radius: 6px;
}

textarea {
    resize: vertical;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 12px;
}

.form-grid button, .form-grid textarea {
    grid-column: 1 / -1;
}

.inline input {
    display: inline-block;
    width: auto;
    margin-right: 8px;
}

button {
    padding: 9px 14px;
    border: 0;
    border-radius: 6px;
    background: #2563eb;
    color: #fff;
    cursor: pointer;
}

.topbar {
    text-align: right;
}

.error {
    color: #b91c1c;
}

.notice {
    padding: 10px 12px;
    background: #ecfdf5;
    color: #047857;
    border: 1px solid #a7f3d0;
    border-radius: 6px;
}