/* Resource articles in the udpackaging.com (东哥) blog layout (/blog/pet-strapping-guide/), 2026-10-23.
   Three columns on desktop: sticky guide map | article | sticky product card. Orange accent instead of their green. */

.page-article-ud { background: #fff; }
.ar-page { padding: 44px 0 0; font-family: "Mulish", system-ui, sans-serif; color: var(--ud-body); }
.ar-wrap { width: 100%; max-width: 1440px; margin-inline: auto; padding-inline: 30px; }
.ar-grid { display: grid; grid-template-columns: 258px minmax(0, 1fr) 300px; gap: 40px; align-items: start; }

/* ── left: guide map ── */
.ar-map { position: sticky; top: 104px; }
.ar-map-box { max-height: calc(100vh - 128px); overflow: auto; padding: 22px 18px 18px 20px; background: #fff; border: 1px solid var(--ud-line); border-left: 4px solid var(--ud-accent); box-shadow: 0 14px 34px rgba(0, 24, 48, .07); scrollbar-width: thin; }
.ar-map-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; margin-bottom: 16px; }
.ar-map-tag { display: inline-block; margin: 0 0 8px; padding: 3px 8px; border: 1px solid rgba(226, 97, 26, .45); background: var(--ud-accent-soft); color: var(--ud-accent-text); font-size: 11px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
.ar-map-title { margin: 0; font-size: 18px; font-weight: 800; line-height: 1.25; color: var(--ud-title); }
.ar-map-toggle { flex: none; padding: 5px 10px; border: 1px solid #c9d6e2; background: #f3f7fb; color: var(--ud-navy); font-size: 11px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; cursor: pointer; }
.ar-map-toggle:hover { border-color: var(--ud-accent); color: var(--ud-accent-text); }
.ar-map.is-collapsed .ar-map-list { display: none; }
.ar-map-list { display: grid; gap: 8px; margin: 0; padding: 0; list-style: none; }
.ar-map-item > a { display: flex; gap: 10px; align-items: flex-start; padding: 10px 10px; border: 1px solid var(--ud-line); background: #f8fafc; font-size: 14px; font-weight: 700; line-height: 1.35; color: var(--ud-title); text-decoration: none; transition: background-color .2s, border-color .2s, box-shadow .2s; }
.ar-map-item > a:hover { border-color: #cbd8e4; background: #fff; }
.ar-map-n { flex: none; min-width: 28px; padding: 2px 0; border: 1px solid #c9d6e2; background: #fff; font-size: 11px; font-weight: 700; text-align: center; color: var(--ud-navy); }
.ar-map-item.is-active > a { border-color: rgba(226, 97, 26, .55); border-left: 3px solid var(--ud-accent); background: #fff7f2; box-shadow: 0 6px 16px rgba(226, 97, 26, .12); }
.ar-map-item.is-active .ar-map-n { border-color: var(--ud-accent); background: var(--ud-accent); color: #fff; }
.ar-map-subs { display: none; margin: 8px 0 4px 16px; padding: 0; list-style: none; }
.ar-map-item.is-active .ar-map-subs { display: grid; gap: 6px; }
.ar-map-subs a { position: relative; display: block; padding-left: 16px; font-size: 13px; line-height: 1.4; color: var(--ud-body); text-decoration: none; }
.ar-map-subs a::before { content: ""; position: absolute; left: 0; top: .45em; width: 7px; height: 7px; border: 1.5px solid var(--ud-accent); }
.ar-map-subs a:hover { color: var(--ud-accent-text); }

/* ── middle: article ── */
.ar-main { min-width: 0; }
.ar-kicker { display: flex; align-items: center; gap: 10px; margin: 0 0 14px; font-size: 13px; font-weight: 700; letter-spacing: .16em; text-transform: uppercase; color: var(--ud-accent-text); }
.ar-h1 { margin: 0; font-size: clamp(32px, 2.7vw, 42px); font-weight: 900; line-height: 1.2; letter-spacing: -.01em; color: var(--ud-title); }
.ar-meta { display: flex; flex-wrap: wrap; gap: 10px; margin: 18px 0 0; font-size: 14px; font-weight: 600; letter-spacing: .04em; text-transform: uppercase; color: var(--ud-muted); }

.ar-source { margin: 8px 0 0; font-size: 14px; font-style: italic; color: var(--ud-muted); }
.ar-cover { position: relative; display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); align-items: center; min-height: 340px; margin: 30px 0 34px; padding: 40px 40px 56px; overflow: hidden; background: linear-gradient(135deg, #f4f7fa 0%, #e9eff5 100%); border: 1px solid var(--ud-line); }
.ar-cover-grid { position: absolute; inset: 0; background-image: linear-gradient(rgba(0, 24, 48, .05) 1px, transparent 1px), linear-gradient(90deg, rgba(0, 24, 48, .05) 1px, transparent 1px); background-size: 40px 40px; -webkit-mask-image: radial-gradient(ellipse 70% 80% at 75% 50%, #000, transparent 80%); mask-image: radial-gradient(ellipse 70% 80% at 75% 50%, #000, transparent 80%); }
.ar-cover-copy { position: relative; z-index: 1; }
.ar-cover-kicker { margin: 0 0 12px; font-size: 14px; font-weight: 700; letter-spacing: .2em; text-transform: uppercase; color: var(--ud-navy); }
.ar-cover-title { margin: 0; font-size: clamp(34px, 3.2vw, 50px); font-weight: 900; line-height: 1.02; letter-spacing: -.01em; text-transform: uppercase; color: var(--ud-navy); }
.ar-cover-rule { display: block; width: 180px; height: 3px; margin: 20px 0 16px; background: var(--ud-accent); }
.ar-cover-sub { max-width: 420px; margin: 0; font-size: 16px; line-height: 1.55; color: var(--ud-body); }
.ar-cover-img { position: relative; z-index: 1; justify-self: center; width: 100%; max-width: 300px; height: auto; max-height: 300px; object-fit: contain; filter: drop-shadow(0 22px 26px rgba(0, 24, 48, .22)); }
.fx .ar-cover-img { animation: arFloat 6s ease-in-out infinite; }
@keyframes arFloat { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }
.ar-cover-band { position: absolute; left: 0; bottom: 0; padding: 9px 26px 9px 40px; background: var(--ud-accent); color: #fff; font-size: 13px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; clip-path: polygon(0 0, 100% 0, calc(100% - 18px) 100%, 0 100%); }

.ar-lead { margin-bottom: 8px; }
.ar-lead-p { margin: 0 0 22px; font-size: 20px; line-height: 1.75; color: var(--ud-ink); }
.ar-p { margin: 0 0 20px; font-size: 18px; line-height: 1.8; color: var(--ud-body); }
.ar-main a:not(.ud-btn):not(.ar-pn-item) { color: var(--ud-accent-text); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; }
.ar-main a:not(.ud-btn):not(.ar-pn-item):hover { color: var(--ud-accent); }
.ar-p-next { padding: 14px 18px 14px 20px; border-left: 3px solid var(--ud-navy); background: #f5f8fb; font-size: 16.5px; line-height: 1.7; }
.ar-p-cond { padding: 14px 18px 14px 20px; border-left: 3px solid var(--ud-accent); background: #fff7f2; font-size: 16.5px; line-height: 1.7; }

.ar-sec { scroll-margin-top: 110px; padding-top: 34px; }
.ar-h2 { margin: 0 0 18px; font-size: clamp(26px, 2.1vw, 32px); font-weight: 900; line-height: 1.25; color: var(--ud-title); }
.ar-h3 { margin: 26px 0 12px; font-size: 21px; font-weight: 800; color: var(--ud-title); }

.ar-note { margin: 4px 0 24px; padding: 22px 26px; background: #f2f4f6; border-left: 5px solid var(--ud-accent); }
.ar-note p { margin: 0; font-size: 17.5px; line-height: 1.75; color: var(--ud-ink); }

.ar-list { margin: 0 0 24px; padding: 0; list-style: none; display: grid; gap: 10px; }
.ar-list li { position: relative; padding-left: 26px; font-size: 17.5px; line-height: 1.7; color: var(--ud-body); }
.ar-list li::before { content: ""; position: absolute; left: 4px; top: .62em; width: 8px; height: 8px; background: var(--ud-accent); transform: rotate(45deg); }
.ar-steps { margin: 0 0 24px; padding: 0; list-style: none; display: grid; gap: 10px; }
.ar-steps li { padding: 14px 18px 14px 20px; background: #f8fafc; border: 1px solid var(--ud-line); border-left: 3px solid var(--ud-navy); font-size: 17px; line-height: 1.65; color: var(--ud-body); }

/* tables: navy header, white rows, light zebra (udpackaging spec tables) */
.ar-table { margin: 6px 0 26px; }
.ar-table-cap { display: flex; align-items: baseline; gap: 10px; margin: 0 0 10px; font-size: 14.5px; font-weight: 700; line-height: 1.45; color: var(--ud-title); }
.ar-table-tag { flex: none; padding: 2px 8px; background: var(--ud-navy); color: #fff; font-size: 11px; letter-spacing: .14em; text-transform: uppercase; }
.ar-table-scroll { overflow-x: auto; border: 1px solid #dbe3ea; box-shadow: 0 10px 26px rgba(0, 24, 48, .06); }
.ar-table table { width: 100%; border-collapse: collapse; font-size: 15.5px; line-height: 1.55; }
.ar-table-dense table { font-size: 14.5px; }
.ar-table-dense thead th, .ar-table-dense tbody th, .ar-table-dense tbody td { padding: 12px 11px; }
.ar-table-wide table { min-width: 880px; }
.ar-table-wide .ar-table-scroll { background: linear-gradient(90deg, #fff 30%, rgba(255, 255, 255, 0)), linear-gradient(90deg, rgba(255, 255, 255, 0), #fff 70%) 100% 0, radial-gradient(farthest-side at 100% 50%, rgba(0, 24, 48, .18), transparent) 100% 0; background-repeat: no-repeat; background-size: 40px 100%, 40px 100%, 14px 100%; background-attachment: local, local, scroll; }
.ar-table thead th { padding: 14px 14px; background: var(--ud-navy); color: #fff; font-weight: 700; text-align: left; vertical-align: bottom; border-right: 1px solid rgba(255, 255, 255, .12); }
.ar-table tbody th, .ar-table tbody td { padding: 13px 14px; text-align: left; vertical-align: top; border-top: 1px solid #e3e9ef; border-right: 1px solid #eef2f6; }
.ar-table tbody th { font-weight: 700; color: var(--ud-title); }
.ar-table tbody td { color: var(--ud-body); }
.ar-table tbody tr:nth-child(even) { background: #f6f8fa; }
.ar-table tbody tr:hover { background: #fff7f2; }

.ar-cta { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 22px; margin: 8px 0 26px; }
.ar-cta-note { margin: 0; max-width: 520px; font-size: 15px; line-height: 1.6; color: var(--ud-muted); }

/* direct answer box */
.ar-answer { margin-top: 30px; padding: 28px 30px 10px; background: #f2f4f6; border-left: 5px solid var(--ud-accent); }
.ar-answer-h { margin: 0 0 14px; font-size: 20px; font-weight: 800; color: var(--ud-title); }
.ar-answer .ar-p { font-size: 19px; color: var(--ud-ink); }

/* FAQ */
.ar-qa-list { display: grid; gap: 0; margin: 4px 0 22px; border-top: 1px solid var(--ud-line); }
.ar-qa { scroll-margin-top: 110px; padding: 22px 0 6px; border-bottom: 1px solid var(--ud-line); }
.ar-q { display: flex; gap: 14px; align-items: baseline; margin: 0 0 12px; font-size: 20px; font-weight: 800; line-height: 1.4; color: var(--ud-title); }
.ar-q-n { flex: none; padding: 2px 7px; background: var(--ud-accent-soft); color: var(--ud-accent-text); font-size: 12px; font-weight: 700; }
.ar-a { padding-left: 46px; }
.ar-a .ar-p { font-size: 17px; }

/* scope panel (udpackaging "About this analysis") */
.ar-scope { margin-top: 40px; padding: 30px 32px 12px; background: #f5f8fa; border-top: 4px solid var(--ud-navy); }
.ar-scope-tag { margin: 0 0 6px; font-size: 12px; font-weight: 700; letter-spacing: .18em; text-transform: uppercase; color: var(--ud-accent-text); }
.ar-scope-h { margin: 0 0 14px; font-size: 26px; font-weight: 900; color: var(--ud-title); }
.ar-scope .ar-p { font-size: 17px; }
.ar-scope-st { margin: 0 0 20px; padding-top: 14px; border-top: 1px solid #dfe6ec; font-size: 15px; line-height: 1.65; color: var(--ud-muted); }

/* closing enquiry box */
.ar-enquiry { position: relative; isolation: isolate; overflow: hidden; margin: 44px 0 0; padding: 38px 36px 40px; background: var(--ud-navy); }
.ar-enquiry-h { position: relative; margin: 0 0 12px; font-size: clamp(26px, 2.2vw, 34px); font-weight: 900; line-height: 1.25; color: #fff; }
.ar-enquiry-p { position: relative; margin: 0 0 26px; font-size: 18px; line-height: 1.65; color: var(--ud-on-dark); }

/* previous / next */
.ar-pn { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin: 40px 0 0; padding: 26px 0 50px; border-top: 1px solid var(--ud-line); }
.ar-pn-item { display: flex; align-items: center; gap: 16px; text-decoration: none; }
.ar-pn-next { justify-content: flex-end; text-align: right; }
.ar-pn-item img { flex: none; width: 72px; height: 72px; object-fit: contain; border-radius: 50%; background: #eef3f7; padding: 6px; }
.ar-pn-label { display: block; margin-bottom: 4px; font-size: 12px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--ud-muted); }
.ar-pn-name { font-size: 17px; font-weight: 700; line-height: 1.4; color: var(--ud-title); }
.ar-pn-item:hover .ar-pn-name { color: var(--ud-accent-text); }

/* ── right: product card ── */
.ar-side { position: sticky; top: 104px; }
.ar-card { padding: 16px 16px 18px; background: linear-gradient(160deg, #0a2a4a 0%, var(--ud-navy) 60%, #000f1f 100%); color: #fff; box-shadow: 0 22px 46px rgba(0, 24, 48, .28); }
.ar-card-img { display: flex; align-items: center; justify-content: center; height: 128px; margin-bottom: 14px; background: linear-gradient(140deg, #f6f8fa, #e6edf3); }
.ar-card-img img { width: auto; max-width: 80%; max-height: 116px; object-fit: contain; }
.ar-card-tag { display: inline-block; margin: 0 0 10px; padding: 3px 8px; border: 1px solid rgba(255, 255, 255, .25); background: rgba(255, 255, 255, .08); font-size: 11px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: #ffb58a; }
.ar-card-title { margin: 0 0 8px; font-size: 21px; font-weight: 900; line-height: 1.22; color: #fff; }
.ar-card-desc { margin: 0 0 14px; font-size: 14px; line-height: 1.55; color: var(--ud-on-dark); }
.ar-card-data { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin: 0 0 14px; }
.ar-card-data div { padding: 10px 10px; border: 1px solid rgba(255, 255, 255, .14); background: rgba(255, 255, 255, .05); }
.ar-card-data dt { margin: 0 0 3px; font-size: 10.5px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: #9fb3c8; }
.ar-card-data dd { margin: 0; font-size: 14px; font-weight: 800; line-height: 1.3; color: #fff; }
.ar-card-links { display: grid; gap: 6px; margin: 0 0 16px; padding: 12px 12px; list-style: none; border: 1px solid rgba(255, 255, 255, .14); }
.ar-card-links a { font-size: 14px; font-weight: 700; color: #fff; text-decoration: none; }
.ar-card-links a:hover { color: #ffb58a; }
.ar-card-btn { display: block; padding: 14px 12px; background: #fff; color: var(--ud-navy); font-size: 14px; font-weight: 800; letter-spacing: .06em; text-align: center; text-transform: uppercase; text-decoration: none; transition: background-color .2s, color .2s; }
.ar-card-btn:hover { background: var(--ud-accent); color: #fff; }

/* ── more resources (udpackaging "Trending now") ── */
.ar-more { padding: 40px 0 46px; background: #eef3f6; }
.ar-more-h { margin: 0 0 22px; font-size: 20px; font-weight: 800; color: var(--ud-title); }
.ar-more-list { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 26px; margin: 0; padding: 0; list-style: none; }
.ar-more-item a { display: flex; align-items: center; gap: 16px; text-decoration: none; }
.ar-more-img { flex: none; display: flex; align-items: center; justify-content: center; width: 72px; height: 72px; border-radius: 50%; background: #fff; box-shadow: 0 6px 16px rgba(0, 24, 48, .08); }
.ar-more-img img { max-width: 56px; max-height: 56px; object-fit: contain; }
.ar-more-kicker { display: block; margin-bottom: 4px; font-size: 11px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--ud-accent-text); }
.ar-more-name { font-size: 17px; font-weight: 600; line-height: 1.4; color: var(--ud-title); }
.ar-more-item a:hover .ar-more-name { color: var(--ud-accent-text); }

/* narrower screens: the product card drops below, the guide map sits above the article (phone layout comes later) */
@media (max-width: 1280px) { .ar-grid { grid-template-columns: 240px minmax(0, 1fr); } .ar-side { position: static; grid-column: 2; } }
@media (max-width: 1000px) {
  .ar-grid { grid-template-columns: 1fr; }
  .ar-map, .ar-side { position: static; grid-column: auto; }
  .ar-map-box { max-height: none; }
  .ar-cover { grid-template-columns: 1fr; }
  .ar-cover-img { max-width: 220px; margin-top: 20px; }
  .ar-more-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) { .ar-wrap { padding-inline: 16px; } .ar-a { padding-left: 0; } .ar-pn { grid-template-columns: 1fr; } .ar-more-list { grid-template-columns: 1fr; } .ar-cover { padding: 28px 22px 52px; } }