.breadcrumb { display: flex; flex-wrap: wrap; gap: 10px; padding: 26px 0; color: var(--color-muted); font-size: .8rem; }
.breadcrumb a { color: var(--color-primary); font-weight: 800; }
.article-hero { padding: 58px 0 76px; background: var(--color-soft); }
.article-hero__grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(360px, .95fr); gap: clamp(44px, 8vw, 118px); align-items: center; }
.article-hero h1 { max-width: 720px; margin-bottom: 20px; font-size: clamp(2.8rem, 5.1vw, 4.9rem); }
.article-hero__copy > p:not(.eyebrow) { max-width: 670px; margin-bottom: 22px; color: var(--color-muted); font-size: 1.1rem; }
.article-meta { display: flex; flex-wrap: wrap; gap: 9px; color: var(--color-muted); font-size: .78rem; font-weight: 700; }
.quick-reference { display: grid; grid-template-columns: 155px 1fr; min-height: 300px; overflow: hidden; border-radius: var(--radius-large); background: var(--color-primary); box-shadow: var(--shadow); }
.quick-reference > img { width: 100%; height: 100%; object-fit: cover; }
.quick-reference > div { padding: 28px; color: #fff; }
.quick-reference .eyebrow { color: #c5dce8; }
.quick-reference h2 { margin-bottom: 17px; font-size: 1.55rem; letter-spacing: -.025em; }
.quick-reference dl { display: grid; margin: 0; }
.quick-reference dl div { display: grid; grid-template-columns: .85fr 1.15fr; gap: 16px; padding: 9px 0; border-top: 1px solid rgba(255, 255, 255, .18); }
.quick-reference dt { color: #c5dce8; font-size: .72rem; font-weight: 700; }
.quick-reference dd { margin: 0; font-size: .78rem; font-weight: 800; }
.article-layout { display: grid; grid-template-columns: 180px minmax(0, 920px); gap: clamp(42px, 7vw, 100px); align-items: start; }
.article-reading { min-width: 0; padding: 90px 0 112px; }
.article-toc { position: sticky; top: 110px; display: grid; gap: 8px; height: fit-content; margin-top: 94px; padding-left: 16px; border-left: 1px solid var(--color-line); font-size: .78rem; }
.article-toc p { margin: 0 0 4px; color: var(--color-primary); font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.article-toc a { color: var(--color-muted); }
.article-toc a:hover { color: var(--color-primary); }
.article-section { padding-bottom: 92px; }
.article-page .section-reveal { opacity: 1; transform: none; }
/* Product-only image replacements for the article. */
.article-page img[src$="specifications.jpg"] { content: url("../../../images/article/article-1/stock/stock-black-stone.jpg"); }
.article-page img[src$="earbuds-comparison.jpg"] { content: url("../../../images/article/article-1/stock/stock-table.jpg"); }
.article-page img[src$="open-ear-earbuds.jpg"] { content: url("../../../images/article/article-1/stock/stock-white-case.jpg"); }
.article-page img[src$="anc-earbuds.jpg"] { content: url("../../../images/article/article-1/stock/stock-neon-case.jpg"); }
.article-page img[src$="use-cases.jpg"] { content: url("../../../images/article/article-1/stock/stock-mono-case.jpg"); }
.article-page img[src$="choosing-earbuds.jpg"] { content: url("../../../images/article/article-1/stock/stock-top-view.jpg"); }
.article-page img[src$="wholesale-earbuds.jpg"] { content: url("../../../images/article/article-1/stock/stock-display.jpg"); }
.article-page img[src$="earbuds-faq.jpg"] { content: url("../../../images/article/article-1/stock/stock-case-detail.jpg"); }
.article-page img[src$="hero-earbuds-studio-v2.jpg"] { content: url("../../../images/article/article-1/stock/stock-dramatic.jpg"); }
.article-page img[src$="buyer-discussion.jpg"] { content: url("../../../images/article/article-1/stock/stock-dark-case.jpg"); }
.article-page img[src$="sourcing-review.jpg"] { content: url("../../../images/article/article-1/stock/stock-hand-case.jpg"); }
.article-page img[src$="sports-earbuds.jpg"] { content: url("../../../images/article/article-1/stock/stock-tray.jpg"); }
.article-page img[src$="enc-call-earbuds.jpg"] { content: url("../../../images/article/article-1/stock/stock-wood.jpg"); }
.article-page img[src$="oem-customization.jpg"] { content: url("../../../images/article/article-1/stock/stock-case.jpg"); }
.article-page img[src$="open-ear-source.jpg"] { content: url("../../../images/article/article-1/stock/stock-minimal.jpg"); }
.article-page img[src$="anc-wireless-earbuds-source.jpg"] { content: url("../../../images/article/article-1/stock/stock-phone-case.jpg"); }
.article-page img[src$="quality-control.jpg"] { content: url("../../../images/article/article-1/stock/stock-warm.jpg"); }
.article-section h2, .related-articles h2 { margin-bottom: 20px; font-size: clamp(2.2rem, 4vw, 3.45rem); }
.article-section p { color: var(--color-muted); }
.article-overview { display: grid; grid-template-columns: .87fr 1.13fr; gap: clamp(32px, 6vw, 76px); align-items: center; }
.article-overview figure { height: 370px; margin: 0; overflow: hidden; border-radius: var(--radius-large); box-shadow: var(--shadow); }
.article-overview figure img { height: 100%; object-fit: cover; }
.article-overview ul { display: grid; gap: 9px; margin: 24px 0 0; padding-left: 20px; color: var(--color-text); font-size: .88rem; }
.article-prose { max-width: 790px; margin: 0 auto; }
.article-prose > h2:not(:first-of-type) { margin-top: 66px; }
.article-prose > p, .article-prose li { color: var(--color-muted); font-size: 1rem; }
.article-prose h3 { margin: 34px 0 9px; font-size: 1.22rem; }
.article-prose ol { display: grid; gap: 12px; padding-left: 23px; }
.article-prose li::marker { color: var(--color-primary); font-weight: 800; }
.article-figure { margin: 30px 0; overflow: hidden; border-radius: var(--radius-large); background: #eaf1f4; box-shadow: var(--shadow); }
.article-figure img { width: 100%; max-height: 380px; object-fit: contain; }
.article-figure--wide img { height: 330px; max-height: none; object-fit: cover; }
.article-table { overflow-x: auto; margin: 28px 0 10px; border: 1px solid var(--color-line); border-radius: 14px; }
.article-table table { width: 100%; min-width: 510px; border-collapse: collapse; font-size: .82rem; }
.article-table th, .article-table td { padding: 14px 16px; border-bottom: 1px solid var(--color-line); text-align: left; }
.article-table thead { color: #fff; background: var(--color-primary); }
.article-table tbody th { color: var(--color-text); }
.article-table tbody td { color: var(--color-muted); }
.article-faq { padding: 42px; border-radius: 30px; background: var(--color-soft); }
.article-faq__heading { display: grid; grid-template-columns: 180px 1fr; gap: 30px; align-items: center; }
.article-faq__heading > img { height: 170px; border-radius: var(--radius-medium); object-fit: cover; }
.article-faq__heading p { margin-bottom: 0; }
.faq-list { margin-top: 34px; border-top: 1px solid var(--color-line); }
.faq-list details { border-bottom: 1px solid var(--color-line); }
.faq-list summary { position: relative; padding: 20px 38px 20px 0; color: var(--color-text); cursor: pointer; font-size: .97rem; font-weight: 800; list-style: none; }
.faq-list summary::after { position: absolute; right: 0; content: '+'; color: var(--color-primary); font-size: 1.35rem; font-weight: 400; }
.faq-list details[open] summary::after { content: '−'; }
.faq-list details p { padding-bottom: 19px; margin-bottom: 0; font-size: .9rem; }
.article-summary { display: grid; grid-template-columns: .9fr 1.1fr; overflow: hidden; padding: 0; border-radius: 30px; color: #fff; background: var(--color-primary-dark); }
.article-summary > img { height: 100%; min-height: 360px; object-fit: cover; }
.article-summary > div { padding: clamp(34px, 5vw, 66px); }
.article-summary .eyebrow { color: #d5e6ee; }
.article-summary h2 { margin-bottom: 18px; }
.article-summary p { color: #d5e6ee; }
.article-summary .button { margin-top: 10px; border-color: #fff; color: var(--color-primary); background: #fff; }
.article-inquiry { display: grid; grid-template-columns: .9fr 1.1fr; gap: clamp(30px, 6vw, 76px); padding: 44px; border-radius: 30px; background: var(--color-soft); }
.article-inquiry > div > img { height: 180px; margin-top: 25px; border-radius: var(--radius-medium); object-fit: cover; }
.article-form { display: grid; gap: 14px; align-content: start; padding: 28px; border-radius: var(--radius-large); background: #fff; box-shadow: var(--shadow); }
.article-form label { display: grid; gap: 6px; font-size: .78rem; font-weight: 800; }
.article-form input, .article-form textarea { width: 100%; padding: 11px 12px; border: 1px solid var(--color-line); border-radius: 10px; color: var(--color-text); resize: vertical; }
.article-form input:focus, .article-form textarea:focus { border-color: var(--color-primary); outline: 3px solid rgba(39, 73, 97, .12); }
.article-footer { display: flex; gap: 15px; align-items: center; padding: 20px 0 34px; border-bottom: 1px solid var(--color-line); }
.article-footer img { width: 68px; height: 68px; border-radius: 50%; object-fit: cover; }
.article-footer p { display: flex; flex-wrap: wrap; gap: 8px; margin: 0; color: var(--color-muted); font-size: .8rem; }
.related-articles { padding-top: 66px; }
.related-articles__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.related-card { display: flex; flex-direction: column; min-height: 350px; overflow: hidden; border-radius: var(--radius-large); background: var(--color-soft); transition: transform .25s ease, box-shadow .25s ease; }
.related-card:hover { box-shadow: var(--shadow); transform: translateY(-5px); }
.related-card img { height: 155px; object-fit: cover; }
.related-card > span, .related-card h3, .related-card p { margin-left: 20px; margin-right: 20px; }
.related-card > span { margin-top: 19px; color: var(--color-primary); font-size: .68rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.related-card h3 { margin-top: 7px; margin-bottom: 9px; font-size: 1.1rem; }
.related-card p { margin-bottom: 20px; color: var(--color-muted); font-size: .8rem; }
@media (max-width: 1040px) { .article-layout { grid-template-columns: 1fr; } .article-toc { display: none; } }
@media (max-width: 800px) { .article-hero__grid, .article-overview, .article-summary, .article-inquiry { grid-template-columns: 1fr; } .article-hero { padding: 48px 0 60px; } .article-overview figure { height: 300px; } .article-summary > img { min-height: 250px; } .article-reading { padding-top: 64px; } }
@media (max-width: 620px) { .breadcrumb { padding: 18px 0; } .article-hero h1 { font-size: clamp(3rem, 14vw, 4.4rem); } .quick-reference { grid-template-columns: 1fr; } .quick-reference > img { height: 165px; } .article-section { padding-bottom: 70px; } .article-faq, .article-inquiry { padding: 22px; border-radius: 22px; } .article-faq__heading { grid-template-columns: 1fr; gap: 22px; } .article-faq__heading > img { height: 210px; } .article-inquiry > div { padding: 18px; } .article-form { padding: 22px; } .related-articles { padding-top: 48px; } .related-articles__grid { grid-template-columns: 1fr; } }

/* HaiPai long-form buyer guide
   A calmer editorial rhythm inspired by established electrical trade journals,
   while retaining HaiPai's blue system and model-first sourcing language. */
.article-page--guide { color: #142d31; background: #fff; }
.article-page--guide .article-hero { padding: clamp(34px, 5vw, 66px) 0 58px; border-bottom: 1px solid #dce5ea; background: linear-gradient(180deg, #f7fbfe 0%, #fff 100%); }
.article-page--guide .article-hero__grid { grid-template-columns: minmax(0, 1fr); gap: 34px; width: min(1040px, calc(100% - 40px)); }
.article-page--guide .article-hero__copy { max-width: 880px; }
.article-page--guide .article-hero h1 { max-width: 860px; margin: 12px 0 18px; color: #102d31; font-size: clamp(2.45rem, 4.2vw, 4.15rem); line-height: 1.02; }
.article-page--guide .article-hero__copy > p:not(.eyebrow) { max-width: 790px; color: #526971; font-size: 1.08rem; line-height: 1.72; }
.article-page--guide .article-meta { gap: 12px; padding-top: 4px; color: #667b83; font-size: .82rem; }
.article-page--guide .quick-reference { grid-template-columns: minmax(260px, .76fr) minmax(0, 1.24fr); min-height: 0; border: 1px solid #c8d9e6; border-radius: 18px; background: #073a61; box-shadow: 0 14px 40px rgba(5, 55, 94, .12); }
.article-page--guide .quick-reference > img { min-height: 320px; object-fit: cover; }
.article-page--guide .quick-reference > div { padding: clamp(26px, 4vw, 44px); }
.article-page--guide .quick-reference h2 { font-size: clamp(1.65rem, 2.5vw, 2.25rem); }
.article-page--guide .quick-reference dl div { grid-template-columns: minmax(110px, .7fr) minmax(0, 1.3fr); padding: 11px 0; }
.article-page--guide .quick-reference dt { color: #9fd2ff; font-size: .72rem; }
.article-page--guide .quick-reference dd { font-size: .86rem; line-height: 1.45; }
.article-page--guide .article-layout { grid-template-columns: 205px minmax(0, 760px); justify-content: center; gap: clamp(42px, 6vw, 82px); width: min(1120px, calc(100% - 40px)); }
.article-page--guide .article-toc { top: 92px; gap: 10px; margin-top: 64px; padding: 18px 0 18px 18px; border-left: 2px solid #d6e2e9; line-height: 1.35; }
.article-page--guide .article-toc a { padding-block: 2px; font-size: .79rem; }
.article-page--guide .article-reading { padding: 64px 0 100px; }
.article-page--guide .article-section { padding-bottom: 64px; margin-bottom: 64px; border-bottom: 1px solid #e1e9ee; }
.article-page--guide .article-section h2,
.article-page--guide .related-articles h2 { margin-bottom: 18px; color: #102d31; font-size: clamp(1.8rem, 3.1vw, 2.65rem); line-height: 1.13; }
.article-page--guide .article-section h3 { color: #173b42; font-size: 1.18rem; line-height: 1.3; }
.article-page--guide .article-section p,
.article-page--guide .article-prose > p,
.article-page--guide .article-prose li { color: #4d646c; font-size: 1rem; line-height: 1.78; }
.article-page--guide .article-overview { grid-template-columns: 1fr; gap: 28px; }
.article-page--guide .article-overview figure { order: 2; height: min(400px, 45vw); min-height: 260px; border-radius: 16px; box-shadow: none; }
.article-page--guide .article-overview > div { order: 1; }
.article-page--guide .article-overview ul { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px 30px; padding: 18px 22px 18px 40px; border-left: 3px solid #045ebf; background: #f2f7fb; }
.article-page--guide .article-prose { max-width: 760px; }
.article-page--guide .article-prose > h2:not(:first-of-type) { margin-top: 72px; padding-top: 6px; }
.article-page--guide .article-figure { margin: 26px 0 30px; border: 1px solid #dce5ea; border-radius: 16px; background: #f4f7f9; box-shadow: none; }
.article-page--guide .article-figure img,
.article-page--guide .article-figure--wide img { height: clamp(230px, 32vw, 350px); object-fit: cover; }
.article-page--guide blockquote { margin: 28px 0; padding: 18px 22px; border-left: 4px solid #045ebf; color: #163d49; background: #eef6fc; font-size: .95rem; line-height: 1.65; }
.article-page--guide .article-table { margin: 28px 0; border-color: #ccdbe4; border-radius: 12px; background: #fff; }
.article-page--guide .article-table table { font-size: .86rem; line-height: 1.45; }
.article-page--guide .article-table th,
.article-page--guide .article-table td { padding: 14px 16px; }
.article-page--guide .article-table thead { background: #045ebf; }
.article-page--guide .article-table tbody tr:nth-child(even) { background: #f6f9fb; }
.article-page--guide .article-faq { padding: clamp(26px, 4vw, 42px); border: 1px solid #d7e3ea; border-radius: 18px; background: #f6f9fb; }
.article-page--guide .article-faq__heading { grid-template-columns: 150px 1fr; }
.article-page--guide .article-faq__heading > img { height: 145px; border-radius: 12px; }
.article-page--guide .faq-list summary { padding: 18px 38px 18px 0; }
.article-page--guide .article-summary { grid-template-columns: .78fr 1.22fr; border-radius: 18px; background: #082f4b; }
.article-page--guide .article-summary > img { min-height: 340px; }
.article-page--guide .article-summary p,
.article-page--guide .article-summary li { color: #d8e8f3; }
.article-page--guide .article-inquiry { gap: 42px; padding: clamp(26px, 4vw, 42px); border: 1px solid #d6e2e9; border-radius: 18px; background: #f2f7fb; }
.article-page--guide .article-form { border: 1px solid #d7e3ea; border-radius: 14px; box-shadow: none; }
.article-page--guide .related-articles__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.article-page--guide .related-card { min-height: 330px; border: 1px solid #d8e3e9; border-radius: 14px; background: #fff; }

@media (max-width: 1040px) {
  .article-page--guide .article-layout { grid-template-columns: minmax(0, 760px); }
  .article-page--guide .article-toc { display: flex; position: static; gap: 8px; overflow-x: auto; margin: 30px 0 0; padding: 0 0 14px; border: 0; border-bottom: 1px solid #dbe5eb; scrollbar-width: thin; }
  .article-page--guide .article-toc p,
  .article-page--guide .article-toc a { flex: 0 0 auto; }
  .article-page--guide .article-toc a { padding: 8px 12px; border: 1px solid #d6e2e9; border-radius: 999px; background: #fff; }
  .article-page--guide .article-reading { padding-top: 36px; }
}

@media (max-width: 620px) {
  body.article-guide-body .contact-rail,
  body.article-guide-body .language-widget,
  body.article-guide-body .back-to-top { display: none !important; }
  .article-page--guide .article-hero { padding: 24px 0 38px; }
  .article-page--guide .article-hero__grid,
  .article-page--guide .article-layout { width: min(100% - 32px, 1120px); }
  .article-page--guide .article-hero h1 { margin-top: 10px; font-size: clamp(1.8rem, 9.2vw, 2.35rem); line-height: 1.06; }
  .article-page--guide .article-hero__copy > p:not(.eyebrow) { font-size: .98rem; line-height: 1.62; }
  .article-page--guide .quick-reference { grid-template-columns: 1fr; border-radius: 14px; }
  .article-page--guide .quick-reference > img { height: 190px; min-height: 190px; }
  .article-page--guide .quick-reference > div { padding: 22px 20px 24px; }
  .article-page--guide .quick-reference dl div { grid-template-columns: 1fr; gap: 4px; }
  .article-page--guide .article-reading { padding: 28px 0 72px; }
  .article-page--guide .article-section { padding-bottom: 48px; margin-bottom: 48px; }
  .article-page--guide .article-overview ul { grid-template-columns: 1fr; }
  .article-page--guide .article-overview figure { height: 235px; min-height: 0; }
  .article-page--guide .article-figure img,
  .article-page--guide .article-figure--wide img { height: 220px; }
  .article-page--guide .article-faq__heading,
  .article-page--guide .article-summary,
  .article-page--guide .article-inquiry { grid-template-columns: 1fr; }
  .article-page--guide .article-faq__heading > img { height: 190px; }
  .article-page--guide .article-summary > img { min-height: 220px; }
  .article-page--guide .article-summary > div { padding: 28px 22px 32px; }
  .article-page--guide .article-inquiry { padding: 22px; }
  .article-page--guide .article-inquiry > div { padding: 0; }
  .article-page--guide .article-form { padding: 20px; }
  .article-page--guide .related-articles__grid { grid-template-columns: 1fr; }
}