:root {
    --bg-color: #e8e2d2;
    --card-bg: #f5f1e6;
    --text-main: #333333;
    --text-sub: #888888;
    --input-bg: #eae5d4;
    --tag-red-bg: #fae4e0;
    --tag-red-text: #e27c79;
    --tag-green-bg: #e5f2e8;
    --tag-green-text: #70b384;
    --btn-bg: #c4a882;
    --btn-hover: #b5976e;
    --btn-active: #a6895f;
    --border-dash: #e0dbce;
    --card-shadow: 0 8px 24px rgba(0, 0, 0, 0.03);
}

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    padding: 0;
    min-height: 100vh;
}

a {
    color: var(--btn-bg);
    text-decoration: none;
}

a:hover {
    opacity: 0.85;
}

code {
    padding: 2px 8px;
    background: var(--input-bg);
    border-radius: 8px;
    font-size: 13px;
    color: var(--text-main);
}

.shell {
    max-width: 720px;
    margin: 0 auto;
    padding: 30px 20px;
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    background: var(--card-bg);
    border-radius: 16px;
    box-shadow: var(--card-shadow);
    margin-bottom: 24px;
    border-bottom: 2px dashed var(--border-dash);
}

.brand {
    font-weight: 700;
    font-size: 18px;
    color: var(--text-main);
}

.topnav a {
    margin-left: 16px;
    font-size: 14px;
    color: var(--text-sub);
    font-weight: 500;
    transition: color 0.2s;
}

.topnav a:hover {
    color: var(--text-main);
}

.container {
    min-height: 60vh;
}

.card {
    background: var(--card-bg);
    padding: 28px;
    border-radius: 16px;
    box-shadow: var(--card-shadow);
    margin-bottom: 20px;
}

.card h2 {
    font-size: 22px;
    font-weight: bold;
    margin-bottom: 16px;
    color: var(--text-main);
}

.card h3 {
    font-size: 18px;
    font-weight: bold;
    margin-bottom: 14px;
    color: var(--text-main);
}

.card h4 {
    font-size: 16px;
    font-weight: bold;
    margin-bottom: 12px;
    color: var(--text-main);
}

.grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

.grid3 {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
}

.tag {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 8px;
    font-size: 12px;
    font-weight: 500;
    margin-right: 8px;
}

.tag.green {
    background-color: var(--tag-green-bg);
    color: var(--tag-green-text);
}

.tag.red {
    background-color: var(--tag-red-bg);
    color: var(--tag-red-text);
}

.form {
    display: grid;
    gap: 16px;
}

.form label {
    display: block;
    font-size: 14px;
    font-weight: bold;
    color: var(--text-main);
    margin-bottom: 6px;
}

.form input[type="text"],
.form input[type="email"],
.form input[type="password"],
.form input {
    width: 100%;
    background: var(--input-bg);
    border: 2px solid transparent;
    border-radius: 12px;
    padding: 12px 15px;
    font-size: 14px;
    color: var(--text-main);
    outline: none;
    transition: border-color 0.3s;
    margin-top: 6px;
}

.form input:focus {
    border-color: var(--tag-green-text);
}

.btn {
    display: inline-block;
    padding: 10px 18px;
    border: none;
    border-radius: 12px;
    background: var(--btn-bg);
    color: #fff;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: background 0.2s, opacity 0.2s;
    text-align: center;
    text-decoration: none;
}

.btn:hover {
    background: var(--btn-hover);
    opacity: 1;
}

.btn:active {
    background: var(--btn-active);
}

.btn.primary {
    background: var(--btn-bg);
    color: #fff;
    font-weight: bold;
    font-size: 15px;
    padding: 12px 20px;
}

.btn.primary:hover {
    background: var(--btn-hover);
}

.btn.highlight {
    background: var(--tag-green-text);
    color: #fff;
    font-weight: bold;
}

.btn.highlight:hover {
    background: #5fa073;
}

.btn.small {
    padding: 6px 12px;
    font-size: 12px;
    border-radius: 8px;
}

.btn.danger {
    background: var(--tag-red-text);
    color: #fff;
}

.btn.danger:hover {
    background: #c96b68;
}

.row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 12px;
}

.kv {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 14px;
    align-items: center;
    font-size: 14px;
}

.kv div:first-child {
    color: var(--text-sub);
    font-weight: 500;
}

.mini {
    padding: 16px;
    border-radius: 12px;
    text-align: center;
    background: var(--input-bg);
}

.mini .label {
    color: var(--text-sub);
    font-size: 12px;
}

.mini .big {
    font-size: 28px;
    font-weight: 800;
    margin-top: 6px;
    color: var(--text-main);
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.table th,
.table td {
    padding: 10px 12px;
    border-bottom: 1px dashed var(--border-dash);
    text-align: left;
}

.table th {
    color: var(--text-sub);
    font-weight: 600;
    font-size: 13px;
}

.table tr:hover {
    background: var(--input-bg);
}

.muted {
    color: var(--text-sub);
}

.small {
    font-size: 13px;
}

.code {
    padding: 14px 18px;
    background: var(--input-bg);
    color: var(--text-main);
    border-radius: 12px;
    white-space: pre-wrap;
    font-family: "SF Mono", "Fira Code", "Consolas", monospace;
    font-size: 13px;
    border: 2px dashed var(--border-dash);
}

pre.code {
    margin: 0;
}

.space {
    height: 20px;
}

.list {
    padding-left: 20px;
    line-height: 2;
    font-size: 14px;
    color: var(--text-main);
}

@media (max-width: 900px) {
    .grid3 {
        grid-template-columns: repeat(2, 1fr);
    }
    .topbar {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }
    .topnav a {
        margin: 0 8px;
    }
    .shell {
        padding: 16px 12px;
    }
}

@media (max-width: 500px) {
    .grid3 {
        grid-template-columns: 1fr 1fr;
    }
    .kv {
        grid-template-columns: 1fr;
    }
}
/* QQ Avatar */
.avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    vertical-align: middle;
    margin-right: 8px;
    object-fit: cover;
    background: var(--input-bg);
}