:root {
    --primary-color: #4a7c59;
    --secondary-color: #2c3e50;
    --bg-color: #f4f7f6;
    --text-color: #3b494c;
    --text-muted: #7f8c8d;
    --card-bg: #ffffff;
    --border-color: #e5eaea;
}

html, body {
    max-width: 100%;
    overflow-x: hidden;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    margin: 0;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
    box-sizing: border-box;
    width: 100%;
}

/* Compact top bar: nav + collapsible disclaimer */
.site-top {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
}

.site-top__inner {
    padding-top: 6px;
    padding-bottom: 6px;
}

.site-nav,
.site-nav > .container {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 4px 12px;
    min-height: 32px;
}

.site-nav > .container {
    width: 100%;
    padding-top: 6px;
    padding-bottom: 6px;
    box-sizing: border-box;
}

.site-top .site-nav > .container {
    padding-top: 0;
    padding-bottom: 0;
}

.site-nav .brand {
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--primary-color);
    text-decoration: none;
    white-space: nowrap;
    line-height: 1.2;
}

.site-nav__links,
.site-nav > .container > ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 2px 10px;
}

.site-nav__links a,
.site-nav > .container > ul a {
    color: var(--secondary-color);
    text-decoration: none;
    font-size: 0.78rem;
    line-height: 1.2;
    padding: 4px 0;
}

.site-nav__links a:hover,
.site-nav > .container > ul a:hover {
    color: var(--primary-color);
}

/* Policy / static pages: compact nav wrapper */
body:not(:has(.site-top)) > .site-nav {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
}

body:not(:has(.site-top)) .ad-wrap.ad-wrap--visible:first-of-type {
    margin-top: 10px;
}

.medical-disclaimer {
    margin: 4px 0 0;
    font-size: 0.72rem;
    color: var(--text-muted);
    line-height: 1.35;
}

.medical-disclaimer summary {
    cursor: pointer;
    user-select: none;
    list-style: none;
    display: inline-block;
}

.medical-disclaimer summary::-webkit-details-marker {
    display: none;
}

.medical-disclaimer summary::before {
    content: '▸ ';
    font-size: 0.65rem;
}

.medical-disclaimer[open] summary::before {
    content: '▾ ';
}

.medical-disclaimer p {
    margin: 6px 0 0;
    max-width: 720px;
}

.main-content {
    padding-top: 10px;
}

/* 默认不占位；仅 .ad-wrap--visible 时展示 */
.ad-wrap {
    display: none;
    margin: 0;
    max-width: 728px;
    text-align: center;
}

.ad-wrap.ad-wrap--visible {
    display: block;
    margin: 0 auto 20px;
}

.ad-wrap--header.ad-wrap--visible {
    margin-top: 0;
    margin-bottom: 16px;
}

.ad-label {
    display: block;
    font-size: 0.65rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.ad-container {
    min-height: 0;
    display: block;
    overflow: hidden;
    border-radius: 8px;
}

.ad-container .adsbygoogle {
    display: block;
    margin: 0 auto;
    min-height: 0;
}

.article-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
    padding-bottom: 40px;
    box-sizing: border-box;
    width: 100%;
}

.card {
    background: var(--card-bg);
    border-radius: 14px;
    overflow: hidden;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.03), 0 1px 3px rgba(0, 0, 0, 0.05);
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
    display: flex;
    flex-direction: column;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 20px rgba(44, 62, 80, 0.06), 0 4px 8px rgba(44, 62, 80, 0.04);
}

.card-image-wrap,
.detail-image-wrap {
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: #eef2f0;
    border-bottom: 1px solid var(--border-color);
}

.card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.95;
    transition: opacity 0.3s ease;
}

.card:hover img {
    opacity: 1;
}

.card-body {
    padding: 22px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.card-body h3 {
    margin: 0 0 10px 0;
    color: var(--secondary-color);
    font-size: 1.15rem;
    line-height: 1.45;
}

.card-body p {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.hidden {
    display: none !important;
}

.loading-text,
.load-error {
    text-align: center;
    color: var(--text-muted);
    padding: 2rem;
}

.detail-view {
    background: var(--card-bg);
    padding: 50px 60px;
    border-radius: 16px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.04);
    margin-bottom: 60px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    box-sizing: border-box;
    width: 100%;
}

#back-btn {
    background: var(--bg-color);
    color: var(--secondary-color);
    border: 1px solid var(--border-color);
    padding: 8px 18px;
    font-size: 0.85rem;
    border-radius: 25px;
    cursor: pointer;
    margin-bottom: 30px;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    font-weight: 500;
}

#back-btn:hover {
    background: var(--primary-color);
    color: #ffffff;
    border-color: var(--primary-color);
}

#detail-content {
    color: var(--text-color);
    word-wrap: break-word;
    overflow-wrap: break-word;
}

#detail-content h1 {
    color: var(--secondary-color);
    font-size: 1.75rem;
    line-height: 1.35;
    margin: 1rem 0 1.25rem;
}

#detail-content h2 {
    color: var(--secondary-color);
    margin-top: 1.8em;
    margin-bottom: 0.8em;
    font-size: 1.5rem;
    border-bottom: 2px solid #eef2f0;
    padding-bottom: 8px;
}

#detail-content p {
    margin-bottom: 1.5em;
    font-size: 1.05rem;
}

#detail-content ul,
#detail-content ol {
    margin-bottom: 1.5em;
    padding-left: 1.5em;
}

#detail-content li {
    margin-bottom: 0.6em;
}

#detail-content strong {
    color: var(--secondary-color);
    font-weight: 600;
}

.detail-image-wrap {
    border-radius: 12px;
    margin: 0 0 25px;
    border: none;
}

#detail-content img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

footer {
    text-align: center;
    padding: 30px 20px;
    color: var(--text-muted);
    font-size: 0.9rem;
    border-top: 1px solid var(--border-color);
    background-color: var(--card-bg);
    margin-top: 40px;
    box-sizing: border-box;
    width: 100%;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px 20px;
    margin-bottom: 16px;
}

.footer-links a {
    color: var(--secondary-color);
    text-decoration: none;
}

.footer-links a:hover {
    color: var(--primary-color);
}

/* Policy pages */
.policy-page main {
    background: var(--card-bg);
    padding: 40px 48px;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
    margin: 12px auto 48px;
    max-width: 800px;
}

.policy-page h1 {
    color: var(--primary-color);
    margin-top: 0;
}

.policy-page h2 {
    color: var(--secondary-color);
    font-size: 1.25rem;
    margin-top: 1.75em;
}

.policy-page p,
.policy-page li {
    font-size: 1rem;
}

@media (max-width: 850px) {
    .detail-view {
        padding: 35px;
    }
}

@media (max-width: 600px) {
    .container {
        padding: 0 15px;
    }

    .detail-view {
        padding: 24px 18px;
        border-radius: 12px;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
        margin-bottom: 30px;
    }

    .site-top__inner {
        padding-top: 5px;
        padding-bottom: 5px;
    }

    .site-nav .brand {
        font-size: 0.85rem;
    }

    .site-nav__links a {
        font-size: 0.74rem;
    }

    .article-grid {
        grid-template-columns: 1fr;
        gap: 18px;
    }

    .ad-wrap.ad-wrap--visible {
        max-width: 100%;
    }

    #detail-content h2 {
        font-size: 1.3rem;
    }

    .policy-page main {
        padding: 24px 18px;
    }
}