/* TUOHAI styles 2/4: product cards, breadcrumb, specification list, news list, article, FAQ, contact, CTA band and footer. */

/* ---------- Product cards and filters ---------- */
.filter-bar { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 30px; }
.filter-btn {
    min-height: 40px; padding: 0 16px;
    border: 1px solid var(--color-border); border-radius: 999px;
    background: var(--color-surface); color: var(--color-text-secondary);
    font-family: var(--font-body); font-size: 14px; font-weight: 600; cursor: pointer;
    transition: background-color 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}
.filter-btn:hover { border-color: var(--color-primary); color: var(--color-primary); }
.filter-btn[aria-pressed="true"] { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }
.filter-empty { color: var(--color-text-secondary); font-size: 15px; }
.product-grid { display: grid; gap: 24px; grid-template-columns: repeat(3, 1fr); }
.product-card {
    display: flex; flex-direction: column; overflow: hidden;
    background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg);
    transition: border-color 0.18s ease;
}
.product-card:hover { border-color: var(--color-primary); }
/* One identical 4:3 frame for every cover, so all cards line up, and the cover fills that frame
   edge to edge — no empty strip is left beside or under a picture. A file whose own shape is not
   4:3 is trimmed to the frame, so cover images are produced at 4:3. The frame clips its own
   content: it is a flex item, and a flex item never shrinks below its content, so without this the
   picture's own height would decide the frame height and the cards would come out different sizes. */
.product-media { display: block; aspect-ratio: 4 / 3; min-height: 0; overflow: hidden; background: var(--color-primary-light); }
.product-media a { display: block; width: 100%; height: 100%; }
.product-media img { display: block; width: 100%; height: 100%; object-fit: cover; }
.product-body { display: flex; flex-direction: column; gap: 10px; padding: 20px 22px 24px; flex: 1; }
.product-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
    display: inline-flex; align-items: center;
    padding: 4px 10px; border-radius: 999px;
    background: var(--color-primary-light); color: var(--color-primary);
    font-size: 12px; font-weight: 600; letter-spacing: 0.02em;
}
.product-name { margin: 0; font-size: 19px; }
.product-name a { color: var(--color-text); }
.product-name a:hover { color: var(--color-primary); text-decoration: none; }
.product-desc { margin: 0; color: var(--color-text-secondary); font-size: 15px; }
.product-body .card-link { margin-top: auto; }

/* ---------- Breadcrumb ---------- */
.breadcrumb { padding-top: 20px; font-size: 14px; }
.breadcrumb ol { display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; list-style: none; color: var(--color-text-secondary); }
.breadcrumb li { display: flex; align-items: center; gap: 8px; margin: 0; }
.breadcrumb li + li::before { content: "/"; color: var(--color-border); }
.breadcrumb a { color: var(--color-text-secondary); }
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb [aria-current="page"] { color: var(--color-text); font-weight: 500; }
/* On a phone the trail stays on one line: the crumbs that lead here keep their width, and the
   current page is shortened with an ellipsis. A long article or product name can then no longer
   push the separator onto a line of its own and break the trail into three rows. */
@media (max-width: 640px) {
    .breadcrumb ol { flex-wrap: nowrap; }
    .breadcrumb li { flex: none; min-width: 0; }
    .breadcrumb li + li::before { flex: none; }
    .breadcrumb li:last-child { flex: 0 1 auto; }
    .breadcrumb li:last-child > a, .breadcrumb li:last-child > span { display: block; overflow: hidden; min-width: 0; text-overflow: ellipsis; white-space: nowrap; }
}

/* ---------- Specification list ---------- */
.spec-list { margin: 0; border-top: 1px solid var(--color-border); }
.spec-row { display: grid; grid-template-columns: minmax(120px, 160px) 1fr; gap: 12px; padding: 12px 0; border-bottom: 1px solid var(--color-border); }
.spec-row dt { margin: 0; color: var(--color-text-secondary); font-size: 14px; font-weight: 500; }
.spec-row dd { margin: 0; font-size: 15px; }

/* ---------- News list template ---------- */
/* Only the cover, the title and "Read article" lead to the article; the rest of the card is plain
   text, so a click on the excerpt, the topic or the date goes nowhere. The lift on hover stays with
   the cover link, because that is where a cover click belongs. */
.news-lead { display: grid; gap: clamp(20px, 3vw, 40px); grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr); align-items: center; padding-bottom: clamp(26px, 3vw, 40px); border-bottom: 1px solid var(--color-border); }
.news-lead-media { margin: 0; overflow: hidden; border-radius: var(--radius-lg); background: var(--color-primary-light); }
.news-lead-media a, .news-row-media a { display: block; }
.news-lead-media img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; transition: transform 0.25s ease; }
.news-lead-media a:hover img { transform: scale(1.02); }
.news-lead-title { margin: 10px 0 12px; font-size: clamp(24px, 2.8vw, 36px); }
.news-lead-title a { color: var(--color-text); }
.news-lead-title a:hover { color: var(--color-primary); }
.news-rows { display: grid; }
.news-row { display: grid; gap: clamp(16px, 2.4vw, 28px); grid-template-columns: 232px minmax(0, 1fr); align-items: center; padding-block: clamp(20px, 2.6vw, 28px); border-bottom: 1px solid var(--color-border); }
.news-row-media { margin: 0; overflow: hidden; border-radius: var(--radius-md); background: var(--color-primary-light); }
.news-row-media img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; transition: transform 0.25s ease; }
.news-row-media a:hover img { transform: scale(1.02); }
.news-row-title { margin: 0 0 8px; font-size: clamp(18px, 1.9vw, 21px); }
.news-row-title a { color: var(--color-text); }
.news-row-title a:hover { color: var(--color-primary); }
.news-lead:focus-within, .news-row:focus-within { outline: 2px solid var(--color-primary); outline-offset: 4px; }
.news-meta { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; color: var(--color-text-secondary); font-size: 13.5px; }
.news-excerpt { margin: 0 0 10px; color: var(--color-text-secondary); font-size: 15px; }
.news-more { display: inline-flex; align-items: center; gap: 6px; color: var(--color-primary); font-size: 14.5px; font-weight: 600; }
.news-more::after { content: "\2192"; }
@media (max-width: 820px) {
    .news-lead { grid-template-columns: 1fr; align-items: start; }
    .news-row { grid-template-columns: 1fr; align-items: start; }
    .news-row-media img { aspect-ratio: 16 / 9; }
}

/* ---------- Article (reading first) ---------- */
.article { max-width: 780px; }
.article-head { max-width: 780px; }
.article-title { margin: 12px 0 14px; font-size: clamp(28px, 3.2vw, 40px); }
.article-meta { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; color: var(--color-text-secondary); font-size: 14.5px; margin-bottom: 0; }
.article-byline { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; margin-top: 4px; color: var(--color-text-secondary); font-size: 14px; }
/* The lead picture keeps the same room below it as above it, so the body text never sits flush
   against the image. */
.article-lead { margin: clamp(22px, 3vw, 34px) 0; }
.article-lead img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; border-radius: var(--radius-lg); }
/* The body of an article is one rich-text field rendered as HTML, so the styles below cover whatever
   an editor can produce: headings, paragraphs, lists, tables, pictures and quotes. Nothing here
   depends on class names the editor cannot write. */
.article-body { max-width: 740px; font-size: 17.5px; line-height: 1.75; }
.article-body > *:first-child { margin-top: 0; }
.article-body > *:last-child { margin-bottom: 0; }
.article-body p { margin: 0 0 1.2em; }
.article-body h2 { margin: 1.7em 0 0.6em; font-size: clamp(23px, 2.5vw, 28px); scroll-margin-top: 104px; }
.article-body h3 { margin: 1.45em 0 0.5em; font-size: 20px; scroll-margin-top: 104px; }
.article-body h4 { margin: 1.3em 0 0.5em; font-size: 18px; }
.article-body ul, .article-body ol { padding-left: 1.3em; margin-bottom: 1.2em; }
.article-body li { margin-bottom: 0.5em; }
.article-body strong { color: var(--color-text); }
.article-body a { font-weight: 600; }
.article-body blockquote { margin: 0 0 1.2em; padding: 4px 0 4px 18px; border-left: 3px solid var(--color-primary); color: var(--color-text-secondary); }
.article-body img { display: block; width: 100%; height: auto; border-radius: var(--radius-lg); }
.article-body figure { margin: 1.7em 0; }
.article-body figure img { margin: 0; }
.article-body figure figcaption { padding-top: 9px; color: var(--color-text-secondary); font-size: 13.5px; }
.article-body table { width: 100%; margin: 1.7em 0; border: 1px solid var(--color-border); border-radius: var(--radius-lg); border-collapse: collapse; overflow: hidden; font-size: 15.5px; }
.article-body th, .article-body td { padding: 12px 16px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--color-border); }
.article-body thead th { background: var(--color-primary-light); font-family: var(--font-heading); font-weight: 600; }
.article-body tbody tr:last-child th, .article-body tbody tr:last-child td { border-bottom: 0; }
@media (max-width: 640px) {
    .article-body { font-size: 16.5px; }
    .article-body table { font-size: 14.5px; }
    .article-body th, .article-body td { padding: 10px 12px; }
}

/* ---------- FAQ ---------- */
.faq-list { max-width: 880px; border-top: 1px solid var(--color-border); }
.faq-item { border-bottom: 1px solid var(--color-border); }
.faq-item summary {
    display: flex; align-items: center; justify-content: space-between; gap: 16px;
    padding: 20px 4px;
    font-size: 17px; font-weight: 600; color: var(--color-text); cursor: pointer;
    list-style: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; flex: none; font-size: 22px; font-weight: 400; line-height: 1; color: var(--color-primary); }
.faq-item[open] summary::after { content: "\2013"; }
.faq-item summary:hover { color: var(--color-primary); }
.faq-body { max-width: 740px; padding: 0 4px 22px; color: var(--color-text-secondary); }
.faq-item[open] > summary { color: var(--color-primary); }
.faq-item summary:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }
.faq-search { max-width: 660px; }
.faq-simple { max-width: 900px; border-top: 1px solid var(--color-border); }
.faq-simple .faq-item summary { gap: 16px; padding: 22px 4px; }
.faq-mark { flex: none; display: inline-flex; align-items: center; justify-content: center; width: 26px; height: 26px; border-radius: 50%; font-size: 12.5px; font-weight: 700; }
.faq-mark-q { background: var(--color-primary-light); color: var(--color-primary); }
.faq-mark-a { background: var(--color-bg); color: var(--color-text-secondary); border: 1px solid var(--color-border); }
.faq-q { display: flex; gap: 12px; align-items: flex-start; }
.faq-a { display: flex; gap: 12px; align-items: flex-start; max-width: 760px; padding: 0 4px 22px; color: var(--color-text-secondary); }
.faq-a p { margin: 0; }
.faq-topic { display: inline-block; margin-bottom: 6px; font-size: 12px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: var(--color-text-secondary); }

/* ---------- Contact ---------- */
.contact-grid { display: grid; gap: clamp(24px, 4vw, 56px); grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr); align-items: start; }
.contact-form {
    padding: clamp(22px, 3vw, 36px);
    background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg);
}
.form-grid { display: grid; gap: 16px; grid-template-columns: 1fr 1fr; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field--full { grid-column: 1 / -1; }
.field label { font-size: 14px; font-weight: 600; }
.field .req { color: var(--color-error); }
.input, .select, .textarea {
    width: 100%; padding: 12px 14px;
    border: 1px solid var(--color-border); border-radius: var(--radius-md);
    background: var(--color-surface); color: var(--color-text);
    font-family: var(--font-body); font-size: 15px;
}
.input:focus, .select:focus, .textarea:focus { outline: 2px solid var(--color-primary); outline-offset: 1px; border-color: var(--color-primary); }
.textarea { min-height: 140px; resize: vertical; }
.field-hint { color: var(--color-text-secondary); font-size: 13px; }
.form-note { margin: 16px 0 0; color: var(--color-text-secondary); font-size: 13.5px; }
.form-status {
    display: none;
    margin: 16px 0 0; padding: 12px 16px;
    border-radius: var(--radius-md);
    background: var(--color-primary-light); color: var(--color-text); font-size: 14px;
}
.form-status.is-visible { display: block; }
.checkbox-field { display: flex; gap: 10px; align-items: flex-start; font-size: 14px; color: var(--color-text-secondary); }
.checkbox-field input { margin-top: 4px; }
.contact-card {
    display: grid; gap: 20px;
    padding: clamp(22px, 3vw, 30px);
    background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg);
}
.contact-item { display: grid; gap: 4px; }
.contact-item .label { font-size: 12.5px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--color-text-secondary); }
.contact-item a, .contact-item span { font-size: 16px; }
.contact-item a { color: var(--color-text); }
.contact-item a:hover { color: var(--color-primary); }

/* ---------- CTA band ---------- */
.cta-band {
    display: flex; flex-wrap: wrap; gap: 20px; align-items: center; justify-content: space-between;
    padding: clamp(28px, 4vw, 48px);
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%); color: #fff;
}
.cta-band h2, .cta-band h3 { margin: 0 0 6px; color: #fff; }
.cta-band p { margin: 0; max-width: 560px; color: rgba(255, 255, 255, 0.86); }
.cta-band-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.cta-band--media { display: grid; grid-template-columns: minmax(0, 190px) minmax(0, 1fr) auto; align-items: center; gap: clamp(20px, 3vw, 40px); }
.cta-band--media .cta-media { margin: 0; overflow: hidden; border-radius: var(--radius-lg); }
/* The band picture keeps its own 3:2 shape, so the view is shown whole and still fills the frame
   edge to edge; swap the file and only this number moves. */
.cta-band--media .cta-media img { width: 100%; aspect-ratio: 3 / 2; object-fit: cover; }
.cta-band--media .cta-copy { display: grid; gap: 8px; }
.cta-band--media h2 { margin-bottom: 0; }
.cta-band--media .cta-band-actions { justify-content: flex-end; }
@media (max-width: 860px) {
    .cta-band--media { grid-template-columns: 1fr; }
    .cta-band--media .cta-copy { order: 1; }
    .cta-band--media .cta-band-actions { order: 2; justify-content: flex-start; }
    .cta-band--media .cta-media { order: 3; max-width: 320px; }
}

/* ---------- Footer ---------- */
.site-footer { background: var(--color-footer-bg); color: var(--color-footer-text); border-top: 1px solid var(--color-border); }
.footer-main { display: grid; gap: 36px; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; padding-block: clamp(40px, 6vw, 72px); }
.footer-brand { display: inline-flex; align-items: center; margin-bottom: 18px; }
.footer-brand:hover { text-decoration: none; }
.footer-brand img { display: block; height: 42px; width: auto; }
.footer-intro { max-width: 340px; margin: 0 0 14px; color: var(--color-footer-muted); font-size: 14.5px; }
.footer-title { margin: 0 0 14px; font-size: 12.5px; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-footer-text); }
.footer-links { display: grid; gap: 10px; margin: 0; padding: 0; list-style: none; }
.footer-links li { margin: 0; }
.footer-links a { color: var(--color-footer-muted); font-size: 14.5px; }
.footer-links a:hover { color: var(--color-primary); }
.footer-contact { display: grid; gap: 10px; }
.footer-contact a, .footer-contact span { color: var(--color-footer-text); font-size: 14.5px; }
.footer-contact a:hover { color: var(--color-primary); }
/* The standing welcome line sits under the contact details, quieter than the links above it. */
.footer-note { margin: 4px 0 0; color: var(--color-footer-muted); font-size: 13.5px; }
.footer-bottom {
    display: flex; flex-wrap: wrap; gap: 12px; align-items: center; justify-content: space-between;
    padding-block: 18px;
    border-top: 1px solid var(--color-border);
    color: var(--color-footer-muted); font-size: 13.5px;
}
.footer-legal { display: flex; flex-wrap: wrap; gap: 18px; }
.footer-legal a { color: var(--color-footer-muted); }
.footer-legal a:hover { color: var(--color-primary); }