:root {
    --bg: #f5f3f0;
    --bg-accent: #fff7ed;
    --surface: #ffffff;
    --surface-muted: #f1f5f9;
    --text: #1f2937;
    --text-muted: #6b7280;
    --primary: #ff6b35;
    --primary-dark: #e85a24;
    --border: #e5e7eb;
    --shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
}

[data-theme='dark'] {
    --bg: #0f172a;
    --bg-accent: #111827;
    --surface: #111827;
    --surface-muted: #1f2937;
    --text: #e5e7eb;
    --text-muted: #9ca3af;
    --primary: #f59e0b;
    --primary-dark: #d97706;
    --border: #334155;
    --shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Alibaba PuHuiTi 2.0", "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--text);
    background: radial-gradient(circle at top right, var(--bg-accent), var(--bg)) fixed;
}

a {
    color: inherit;
    text-decoration: none;
}

.app-shell {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 40px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 10;
}

.brand-link {
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand-logo {
    height: 36px;
}

.brand-text {
    font-size: 20px;
    font-weight: 700;
}

.topnav {
    display: flex;
    gap: 20px;
    font-weight: 500;
}

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

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

.theme-toggle {
    border: 1px solid var(--border);
    background: var(--surface-muted);
    padding: 8px 12px;
    border-radius: 999px;
    cursor: pointer;
}

.app-body {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 24px;
    padding: 24px 40px 60px;
}

.sidebar {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 20px;
    box-shadow: var(--shadow);
    height: fit-content;
    position: sticky;
    top: 90px;
}

.sidebar-title {
    font-weight: 600;
    margin-bottom: 12px;
}

.category-group {
    margin-bottom: 10px;
    border-bottom: 1px dashed var(--border);
    padding-bottom: 8px;
}

.category-group summary {
    display: flex;
    justify-content: space-between;
    cursor: pointer;
    font-weight: 600;
}

.category-group .icon {
    margin-right: 6px;
}

.category-group ul {
    list-style: none;
    padding-left: 0;
    margin: 10px 0 0;
}

.category-group li {
    margin-bottom: 6px;
}

.category-group a {
    color: var(--text-muted);
    display: flex;
    justify-content: space-between;
}

.content {
    min-width: 0;
}

.home-hero {
    background: var(--surface);
    border-radius: 24px;
    padding: 32px;
    box-shadow: var(--shadow);
    display: grid;
    gap: 20px;
    margin-bottom: 24px;
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 20px;
}

.detail-section {
    margin-bottom: 20px;
}

.rich-text {
    line-height: 1.7;
    color: var(--text-muted);
}

.cover-image {
    width: 100%;
    border-radius: 12px;
}

.search-bar {
    display: flex;
    gap: 12px;
}

.search-bar input {
    flex: 1;
    padding: 12px 14px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: var(--surface-muted);
}

.search-bar button,
.primary-button {
    background: var(--primary);
    color: #fff;
    border: none;
    padding: 12px 18px;
    border-radius: 12px;
    cursor: pointer;
    font-weight: 600;
}

.filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 16px;
}

.filter-bar input,
.filter-bar select {
    padding: 10px 12px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--surface-muted);
}

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

.section {
    margin: 32px 0;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
}

.product-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.2s ease;
}

.product-card:hover {
    transform: translateY(-4px);
}

.product-card-media {
    height: 120px;
    background: var(--surface-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.product-card-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-card-placeholder {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary);
}

.sponsor-badge {
    position: absolute;
    top: 8px;
    right: 8px;
    background: var(--primary);
    color: #fff;
    font-size: 12px;
    padding: 4px 8px;
    border-radius: 999px;
}

.product-card-body {
    padding: 12px;
}

.product-card-title {
    font-weight: 600;
    margin-bottom: 6px;
}

.product-card-summary {
    color: var(--text-muted);
    font-size: 13px;
}

.category-block {
    margin-bottom: 28px;
}

.category-block-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.view-toggle {
    display: inline-flex;
    gap: 10px;
    margin-bottom: 16px;
}

.view-toggle a {
    padding: 6px 12px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: var(--surface-muted);
    font-size: 13px;
}

.view-toggle a.active {
    background: var(--primary);
    color: #fff;
    border-color: transparent;
}

.more-panel {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--surface);
    border: 1px dashed var(--border);
    padding: 12px 16px;
    border-radius: 12px;
    margin-bottom: 16px;
}

.more-link {
    color: var(--primary);
    font-weight: 600;
}

.article-summary {
    color: var(--text-muted);
    font-size: 13px;
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 16px;
}

.category-card {
    background: var(--surface);
    padding: 16px;
    border-radius: 16px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}

.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.tag-chip {
    padding: 6px 12px;
    background: var(--surface-muted);
    border-radius: 999px;
    font-size: 13px;
}

.detail-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 24px;
}

.detail-card {
    background: var(--surface);
    padding: 16px;
    border-radius: 16px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    margin-bottom: 16px;
}

.meta-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
}

.media-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 12px;
}

.media-grid img {
    width: 100%;
    border-radius: 12px;
}

.article-list {
    display: grid;
    gap: 16px;
}

.article-item {
    background: var(--surface);
    padding: 16px;
    border-radius: 16px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}

.article-title {
    font-weight: 600;
    margin-bottom: 6px;
}

.article-meta {
    color: var(--text-muted);
    font-size: 13px;
    display: flex;
    gap: 10px;
}

.notice {
    padding: 12px;
    border-radius: 12px;
    margin-bottom: 12px;
}

.notice.success {
    background: #dcfce7;
    color: #166534;
}

.notice.error {
    background: #fee2e2;
    color: #991b1b;
}

.comment-form {
    display: grid;
    gap: 12px;
    margin-bottom: 20px;
}

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

.comment-form input,
.comment-form textarea,
.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 10px 12px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--surface-muted);
}

.captcha-row {
    align-items: center;
}

.captcha-image {
    height: 44px;
    border-radius: 10px;
    border: 1px solid var(--border);
    cursor: pointer;
}

.comment-item {
    border-bottom: 1px dashed var(--border);
    padding: 12px 0;
}

.comment-actions {
    margin-top: 6px;
}

.like-button {
    background: var(--surface-muted);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 4px 10px;
    cursor: pointer;
}

.comment-reply {
    margin-top: 6px;
    color: var(--text-muted);
}

.footer {
    margin-top: auto;
    padding: 20px 40px;
    background: var(--surface);
    border-top: 1px solid var(--border);
}

.footer-inner {
    display: flex;
    gap: 16px;
    color: var(--text-muted);
    flex-wrap: wrap;
}

.footer-links a {
    margin-right: 10px;
    color: var(--text-muted);
    font-size: 13px;
}

.pagination {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 20px;
}

.pagination .page {
    padding: 6px 12px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--surface);
    font-size: 13px;
}

.pagination .page.active {
    background: var(--primary);
    color: #fff;
    border-color: transparent;
}

.pagination .page.disabled {
    color: var(--text-muted);
}

@media (max-width: 960px) {
    .app-body {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: static;
    }

    .detail-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .topbar {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .topnav {
        flex-wrap: wrap;
    }

    .app-body {
        padding: 16px;
    }
}