/* 内页通用样式:错误页(404/500) + 帮助中心,与站点主题(DuMate)保持一致 */

.page-wrap {
    background: #f7f9fc;
    min-height: calc(100vh - 108px);
    padding: 48px 16px 72px;
}

.page-container {
    max-width: 1100px;
    margin: 0 auto;
}

/* ---------- 错误页 ---------- */
.error-card {
    max-width: 720px;
    margin: 0 auto;
    padding: 64px 24px 56px;
    background: #fff;
    border-radius: 24px;
    text-align: center;
    box-shadow: 0 8px 32px rgba(16, 19, 26, .06);
}

.error-code {
    font-size: 96px;
    font-weight: 800;
    line-height: 1;
    letter-spacing: -2px;
    background: linear-gradient(135deg, #1677ff, #5c61ff);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.error-title {
    margin: 22px 0 10px;
    font-size: 26px;
    font-weight: 600;
    color: #10131a;
}

.error-desc {
    max-width: 520px;
    margin: 0 auto 30px;
    font-size: 15px;
    line-height: 1.8;
    color: #495366;
}

.error-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
}

.btn-primary,
.btn-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 40px;
    padding: 0 24px;
    border-radius: 20px;
    font-size: 15px;
    font-weight: 500;
    text-decoration: none;
    transition: background .2s, color .2s, border-color .2s;
}

.btn-primary {
    color: #fff;
    background: #000;
}

.btn-primary:hover {
    background: #4d4d4d;
}

.btn-ghost {
    color: #10131a;
    background: #fff;
    border: 1px solid #10131a;
}

.btn-ghost:hover {
    color: #818999;
    border-color: #818999;
}

.error-links {
    margin: 30px 0 0;
    font-size: 14px;
    color: #818999;
}

.error-links a {
    color: #495366;
    text-decoration: none;
}

.error-links a:hover {
    color: #1677ff;
}

/* ---------- 帮助中心 ---------- */
.page-hero {
    padding: 8px 0 4px;
    text-align: center;
}

.page-hero h1 {
    margin: 0 0 10px;
    font-size: 32px;
    font-weight: 700;
    color: #10131a;
}

.page-hero p {
    margin: 0 0 22px;
    font-size: 14px;
    color: #818999;
}

.doc-search {
    max-width: 440px;
    margin: 0 auto;
}

.doc-search input {
    width: 100%;
    height: 44px;
    padding: 0 20px;
    font-size: 14px;
    color: #10131a;
    background: #fff;
    border: 1px solid #e5e6eb;
    border-radius: 22px;
    outline: none;
    transition: border-color .2s, box-shadow .2s;
    -webkit-appearance: none;
}

.doc-search input::placeholder {
    color: #a9aeb8;
}

.doc-search input:focus {
    border-color: #1677ff;
    box-shadow: 0 0 0 3px rgba(22, 119, 255, .12);
}

.doc-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 20px;
    margin-top: 32px;
}

.doc-section {
    padding: 20px 22px;
    background: #fff;
    border-radius: 18px;
    box-shadow: 0 4px 18px rgba(16, 19, 26, .05);
}

.doc-section h2 {
    margin: 0 0 12px;
    padding-bottom: 10px;
    font-size: 16px;
    font-weight: 600;
    color: #10131a;
    border-bottom: 1px solid #f0f2f5;
}

.doc-section h3 {
    margin: 14px 0 4px;
    font-size: 13px;
    font-weight: 600;
    color: #818999;
}

.doc-section a {
    display: block;
    padding: 5px 0;
    font-size: 14px;
    line-height: 1.6;
    color: #495366;
    text-decoration: none;
}

.doc-section a:hover {
    color: #1677ff;
}

.doc-empty {
    margin: 40px 0;
    font-size: 14px;
    color: #818999;
    text-align: center;
}

@media (max-width: 640px) {
    .page-wrap {
        padding: 28px 12px 48px;
    }

    .error-card {
        padding: 44px 18px 40px;
        border-radius: 18px;
    }

    .error-code {
        font-size: 72px;
    }

    .error-title {
        font-size: 22px;
    }

    .page-hero h1 {
        font-size: 26px;
    }
}