/* 7017-style editorial reading layout, isolated to Tieqi brand detail pages. */
.tieqi-brand-page {
  --tb-ink: #242b37; --tb-muted: #667182; --tb-accent: #bd480f;
  --tb-hover: #fff1e7; --tb-line: #e9edf3; --tb-surface: #f3f5f9;
  --tb-paper: #fff; --tb-prose: #39485c; --tb-anchor-offset: 104px;
  background: var(--tb-paper); color: var(--tb-ink);
}
.tieqi-brand-page .customize-width { max-width: 1900px; }
.tieqi-brand-page .sidebar-nav { width: 220px; }
.tieqi-brand-page.mini-sidebar .sidebar-nav { width: 60px; }
@media (min-width:768px) {
  .tieqi-brand-page .main-content { margin-left: 220px; }
  .tieqi-brand-page .main-content .page-header { left: 220px; }
  .tieqi-brand-page.mini-sidebar .main-content { margin-left: 60px; }
  .tieqi-brand-page.mini-sidebar .main-content .page-header { left: 60px; }
}
.tieqi-brand-page #content.tb-page {
  width: 100%; max-width: 1480px; margin: 0 auto; padding: 32px 32px 52px;
  font: 14px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;
  color: var(--tb-ink);
}
.tb-symbols { position: absolute; width: 0; height: 0; overflow: hidden; }
.tb-page *, .tb-page *::before, .tb-page *::after { box-sizing: border-box; }
.tb-page [hidden] { display: none !important; }
.tb-page a { color: inherit; text-decoration: none; touch-action: manipulation; }
.tb-page a:hover { color: var(--tb-accent); }
.tb-page button { font: inherit; cursor: pointer; touch-action: manipulation; }
.tb-page a:focus-visible, .tb-page button:focus-visible, .tb-page input:focus-visible, .tb-page summary:focus-visible, .tb-skip:focus-visible { outline: 2px solid var(--tb-accent); outline-offset: 4px; }
.tb-skip { position: fixed; top: -100px; left: 80px; z-index: 2000; padding: 12px 20px; background: #fff; color: #242b37; box-shadow: 0 2px 12px #0002; }
.tb-skip:focus { top: 12px; }
.tb-sr-only { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.tb-icon { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; flex-shrink: 0; }
.tb-reading-layout { display: grid; grid-template-columns: 160px minmax(0,1fr); gap: 28px; align-items: stretch; }
.tb-main-layout { display: grid; grid-template-columns: minmax(0,1fr) 208px; gap: 28px; align-items: start; min-width: 0; }
.tb-article, .tb-aside, .tb-hero-copy { min-width: 0; }
.tb-article { container-type: inline-size; }
.tb-outline { min-width: 0; position: relative; }
.tb-outline-inner { position: sticky; top: 96px; padding: 1px 0 12px; }
.tb-outline-inner summary { display: flex; align-items: center; gap: 9px; min-height: 44px; padding: 4px 10px; margin: 0 0 12px; list-style: none; cursor: pointer; color: var(--tb-ink); font-size: 14px; font-weight: 600; }
.tb-outline-inner summary::-webkit-details-marker { display: none; }
.tb-outline-inner summary > .tb-icon:first-child { color: var(--tb-muted); width: 16px; height: 16px; }
.tb-outline-chevron { width: 14px; height: 14px; margin-left: auto; transition: transform .18s ease; }
.tb-outline-inner[open] .tb-outline-chevron { transform: rotate(180deg); }
.tb-outline-current { display: none; }
.tb-outline-scroll { max-height: calc(100dvh - 180px); overflow-y: auto; overscroll-behavior: contain; scrollbar-width: thin; scrollbar-color: #d4dce9 transparent; padding: 0 6px 4px 0; }
.tb-outline-list, .tb-outline-list ol { list-style: none; margin: 0; padding: 0; }
.tb-outline-list { border-left: 1px solid var(--tb-line); }
.tb-outline-list li { margin: 0; padding: 0; }
.tb-outline-list a { position: relative; display: flex; align-items: center; min-height: 44px; padding: 10px 10px 10px 14px; border-radius: 0 5px 5px 0; color: var(--tb-muted); font-size: 14px; line-height: 1.55; overflow-wrap: anywhere; transition: background .18s ease,color .18s ease; }
.tb-outline-list a:hover { color: var(--tb-accent); background: var(--tb-surface); }
.tb-outline-list a.is-active { color: var(--tb-accent); background: var(--tb-hover); font-weight: 600; }
.tb-outline-list a.is-active::before { content: ''; position: absolute; left: -1px; top: 10px; bottom: 10px; width: 2px; background: var(--tb-accent); border-radius: 2px; }
.tb-outline-list ol a { padding-left: 24px; font-size: 13px; }
.tb-outline-list ol:empty { display: none; }
.tb-breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 24px; color: var(--tb-muted); font-size: 13px; line-height: 1.8; }
.tb-section { margin-top: 36px; scroll-margin-top: var(--tb-anchor-offset); }
.tb-profile { margin-top: 0; }
.tb-hero { display: grid; grid-template-columns: 200px minmax(0,1fr); gap: 26px; margin-bottom: 24px; position: relative; isolation: isolate; }
.tb-hero::before { content: ''; position: absolute; z-index: -1; pointer-events: none; left: 145px; top: -40px; width: 430px; max-width: calc(100% - 145px); height: 260px; background: radial-gradient(ellipse, #f28c5b09, transparent 70%); }
.tb-logo-panel { width: 200px; height: 200px; display: flex; flex-direction: column; justify-content: center; align-items: center; gap: 10px; background: #f1f4f9; border-radius: 5px; }
.tb-brand-logo { width: 98px; height: 98px; display: grid; place-items: center; border-radius: 8px; background: #fff; box-shadow: 0 4px 16px #37507808; }
.tb-brand-logo img { width: 98px; height: 98px; padding: 8px; object-fit: contain; display: block; border-radius: 8px; }
.tb-logo-tools { display: flex; align-items: center; justify-content: center; gap: 18px; }
.tb-page .tb-logo-stat, .tb-favorite { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 4px; min-width: 44px; min-height: 44px; color: var(--tb-muted); font-size: 12px; line-height: 1.2; }
.tb-favorite { padding: 0; border: 0; background: transparent; color: var(--tb-accent); }
.tb-favorite svg { width: 24px; height: 24px; padding: 3px; fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; background: #ffffffb3; border-radius: 50%; }
.tb-logo-stat .tb-icon { width: 24px; height: 24px; padding: 3px; background: #ffffffb3; border-radius: 50%; }
.tb-favorite[aria-pressed="true"] svg { fill: #ffdec7; }
.tb-hero-copy { padding: 6px 0; }
.tb-title-line { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.tb-title-line h1 { margin: 0; color: var(--tb-ink); font-size: 30px; line-height: 1.4; font-weight: 700; letter-spacing: -.3px; overflow-wrap: anywhere; }
.tb-brand-badge { padding: 3px 8px; border-radius: 4px; color: #98502a; background: #fbefe6; font-size: 12px; line-height: 1.5; }
.tb-brand-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 7px; margin-top: 9px; font-size: 13px; color: var(--tb-muted); }
.tb-page .tb-brand-meta a { color: #8b713f; }
.tb-page .tb-updated { color: var(--tb-muted); margin: 8px 0 0; font-size: 12px; }
.tb-updated time { font-variant-numeric: tabular-nums; }
.tb-page .tb-summary { color: #535f70; margin: 14px 0 18px; max-width: 760px; font-size: 15px; line-height: 1.85; overflow-wrap: anywhere; }
.tb-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 9px; }
.tb-button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 44px; padding: 10px 16px; border: 1px solid transparent; border-radius: 4px; font-size: 14px; line-height: 1.5; transition: background .18s ease,color .18s ease; }
.tb-page .tb-button-primary { background: var(--tb-accent); color: #fff; box-shadow: 0 3px 7px #bd480f22; }
.tb-page .tb-button-primary:hover { background: #983807; color: #fff; }
.tb-button .tb-icon, .tb-button svg { width: 14px; height: 14px; }
.tb-button svg { fill: none; stroke: currentColor; stroke-width: 1.6; }
.tb-button-secondary { background: #f0f2f6; color: #576270; }
.tb-button-secondary:hover { background: var(--tb-hover); color: var(--tb-accent); }
.tb-text-link { display: inline-flex; align-items: center; gap: 6px; padding: 8px; min-height: 44px; font-size: 14px; color: var(--tb-muted) !important; }
.tb-text-link:hover { color: var(--tb-accent) !important; }
.tb-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 24px; }
.tb-tags a { display: flex; align-items: center; gap: 4px; font-size: 12px; padding: 5px 9px; line-height: 1.6; background: #f4f5f7; color: var(--tb-muted); border-radius: 3px; }
.tb-tags strong { font-weight: 400; }
.tb-tags a:hover { background: var(--tb-hover); }
.tb-tabs { display: flex; flex-wrap: wrap; gap: 4px; border-bottom: 1px solid var(--tb-line); }
.tb-tabs a { min-height: 46px; padding: 12px 18px; display: inline-flex; align-items: center; justify-content: center; font-size: 14px; color: var(--tb-muted); border-radius: 4px 4px 0 0; }
.tb-tabs a.is-active { background: var(--tb-accent); color: #fff; box-shadow: 0 3px 9px #bd480f20; }
.tb-tabs a:hover:not(.is-active) { background: var(--tb-surface); color: var(--tb-accent); }
.tb-facts { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 12px 26px; margin: 0; padding: 20px 22px; border: 1px solid var(--tb-line); border-top: 0; border-radius: 0 0 4px 4px; font-size: 14px; line-height: 1.8; }
.tb-facts > div { display: flex; min-width: 0; align-items: baseline; gap: 7px; }
.tb-facts dt { flex: 0 0 5em; font-weight: 400; color: var(--tb-muted); white-space: nowrap; }
.tb-facts dt::after { content: '：'; }
.tb-facts dd { min-width: 0; margin: 0; overflow-wrap: anywhere; }
.tb-facts dd a { color: var(--tb-accent); }
.tb-section-heading { display: flex; align-items: center; justify-content: space-between; gap: 15px; margin-bottom: 18px; }
.tb-section-heading h2 { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; font-size: 20px; line-height: 1.55; font-weight: 700; color: var(--tb-ink); margin: 0; }
.tb-section-heading h2 > .tb-icon { width: 19px; height: 19px; color: var(--tb-accent); }
.tb-section-heading .tb-text-link { font-size: 13px; padding: 0; }
.tb-prose { max-width: 840px; font-size: 16px; line-height: 1.9; color: var(--tb-prose); overflow-wrap: anywhere; }
.tb-prose p { color: var(--tb-prose); margin: 0 0 18px; }
.tb-prose h3, .tb-prose h4 { line-height: 1.6; margin: 30px 0 14px; color: var(--tb-ink); font-weight: 650; scroll-margin-top: var(--tb-anchor-offset); }
.tb-prose h3 { font-size: 19px; }
.tb-prose h4 { font-size: 17px; }
.tb-prose h3:first-child { margin-top: 30px; }
.tb-prose img { max-width: 100%; height: auto; }
.tb-prose ul, .tb-prose ol { padding-left: 24px; margin-bottom: 20px; }
.tb-page .tb-section-description { font-size: 14px; line-height: 1.85; color: var(--tb-muted); margin: 0 0 18px; }
.tb-series-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 14px; }
.tb-series-card { display: flex; flex-direction: column; padding: 18px; min-width: 0; min-height: 116px; background: var(--tb-surface); border: 1px solid transparent; border-radius: 5px; transition: border-color .18s ease,background .18s ease; }
.tb-series-card:hover { background: var(--tb-hover); border-color: #efd8c9; }
.tb-series-top { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.tb-series-top strong { font-size: 16px; font-weight: 600; }
.tb-series-top > span { color: var(--tb-muted); }
.tb-series-types { font-size: 13px; color: var(--tb-muted); margin: 10px 0 6px; }
.tb-series-count { font-size: 12px; color: var(--tb-muted); margin-top: auto; }
.tb-model-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin: 0 0 18px; }
.tb-filter { display: flex; flex-wrap: wrap; gap: 8px; }
.tb-filter button { min-height: 44px; padding: 8px 12px; border: 1px solid var(--tb-line); border-radius: 4px; color: var(--tb-muted); background: var(--tb-paper); font-size: 13px; }
.tb-filter button:hover { border-color: var(--tb-accent); color: var(--tb-accent); }
.tb-filter button.is-active { background: var(--tb-hover); color: var(--tb-accent); border-color: #e8c4ae; font-weight: 600; }
.tb-filter-count { color: var(--tb-muted); font-size: 12px; }
.tb-page:not(.tb-enhanced) .tb-filter { display: none; }
.tb-model-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 16px; }
.tb-model-card { border: 1px solid var(--tb-line); border-radius: 5px; overflow: hidden; background: var(--tb-paper); transition: border-color .18s ease,box-shadow .18s ease; }
.tb-model-card:hover { border-color: #dfb69e; box-shadow: 0 4px 12px #19375810; }
.tb-model-image { aspect-ratio: 1.65; padding: 26px 12px 8px; background: var(--tb-surface); position: relative; }
.tb-model-image img { width: 100%; height: 100%; object-fit: contain; display: block; mix-blend-mode: multiply; }
.tb-model-kind { position: absolute; top: 10px; left: 12px; color: var(--tb-muted); font-size: 12px; }
.tb-model-body { padding: 14px 16px 0; }
.tb-model-brand { color: var(--tb-muted); font-size: 12px; }
.tb-model-body h3 { font-size: 18px; font-weight: 600; line-height: 1.5; color: var(--tb-ink); margin: 4px 0 10px; overflow-wrap: anywhere; }
.tb-model-card:hover h3 { color: var(--tb-accent); }
.tb-page .tb-model-price { font-size: 16px; font-weight: 600; color: var(--tb-accent); margin: 0 0 12px; font-variant-numeric: tabular-nums; }
.tb-model-price small { display: block; font-size: 11px; font-weight: 400; color: var(--tb-muted); margin-top: 3px; }
.tb-model-footer { display: flex; align-items: center; justify-content: space-between; gap: 8px; border-top: 1px solid var(--tb-line); padding: 12px 0; font-size: 12px; color: var(--tb-muted); }
.tb-model-footer > span:last-child { color: var(--tb-accent); }
.tb-page .tb-footnote { color: var(--tb-muted); font-size: 13px; line-height: 1.85; margin: 18px 0 0; }
.tb-empty { padding: 22px 20px; border: 1px solid var(--tb-line); border-radius: 5px; background: var(--tb-surface); color: var(--tb-muted); font-size: 14px; line-height: 1.9; }
.tb-empty a { color: var(--tb-accent); text-decoration: underline; }
.tb-wide-banner { position: relative; isolation: isolate; overflow: hidden; display: flex; align-items: center; justify-content: space-between; gap: 20px; width: 100%; min-height: 154px; margin-top: 36px; padding: 26px 30px; border-radius: 7px; color: #fff !important; background: linear-gradient(110deg,#34404a,#242931); }
.tb-wide-banner::before { content: ''; position: absolute; inset: 0; z-index: -1; background: radial-gradient(circle at 90% 150%,#e37d3c35,transparent 45%); }
.tb-banner-kicker { font-size: 12px; letter-spacing: 1px; color: #c3cdd5; }
.tb-wide-banner strong { display: block; font-size: 23px; line-height: 1.5; color: #ffb77a; margin: 7px 0 8px; }
.tb-page .tb-wide-banner p { color: #cad2da; margin: 0; font-size: 14px; line-height: 1.8; }
.tb-banner-bike { position: absolute; z-index: -1; right: 58px; width: 128px; height: 100px; fill: none; stroke: #f7bc8730; stroke-width: 1; }
.tb-banner-arrow { width: 32px; height: 32px; flex-shrink: 0; display: grid; place-items: center; border-radius: 50%; background: #e99553; color: #242931; font-size: 20px; }
.tb-news-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 14px; }
.tb-news-card { display: flex; flex-direction: column; justify-content: space-between; min-width: 0; min-height: 146px; background: var(--tb-surface); border: 1px solid transparent; border-radius: 5px; padding: 16px; transition: background .18s ease,border-color .18s ease; }
.tb-news-card:hover { background: var(--tb-hover); border-color: #efd8c9; }
.tb-news-category { color: var(--tb-accent); font-size: 12px; }
.tb-news-card h3 { font-size: 14px; line-height: 1.75; color: var(--tb-ink); font-weight: 600; margin: 8px 0 16px; }
.tb-news-card time { color: var(--tb-muted); font-size: 12px; margin-top: auto; }
.tb-sources { padding-top: 24px; border-top: 1px solid var(--tb-line); }
.tb-sources > p { color: var(--tb-prose); font-size: 15px; line-height: 1.9; }
.tb-source-link { display: inline-flex; align-items: center; gap: 8px; min-height: 44px; font-size: 14px; color: var(--tb-accent) !important; }
.tb-source-link:hover { text-decoration: underline; }
.tb-related-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 14px; }
.tb-related-brand { display: flex; align-items: center; gap: 10px; min-width: 0; min-height: 84px; padding: 12px; background: var(--tb-surface); border: 1px solid transparent; border-radius: 4px; }
.tb-related-brand:hover { background: var(--tb-hover); border-color: #efd8c9; }
.tb-related-brand img { width: 40px; height: 40px; flex-shrink: 0; object-fit: contain; background: #fff; border-radius: 5px; padding: 3px; }
.tb-related-brand > div { min-width: 0; flex: 1; }
.tb-related-brand h3 { font-size: 14px; font-weight: 600; line-height: 1.65; margin: 0 0 4px; color: var(--tb-ink); }
.tb-related-brand div > span { display: block; font-size: 12px; color: var(--tb-muted); }
.tb-related-brand > .tb-icon { width: 11px; height: 11px; color: var(--tb-muted); }
.tb-aside { padding-top: 33px; }
.tb-rail-section { margin-bottom: 28px; }
.tb-rail-section h2 { display: flex; align-items: center; justify-content: space-between; gap: 8px; font-size: 16px; font-weight: 700; color: var(--tb-ink); margin: 0 0 12px; }
.tb-rail-section h2 > a { font-size: 12px; font-weight: 400; color: var(--tb-muted); }
.tb-brand-links { list-style: none; margin: 0; padding: 0; }
.tb-brand-links a { display: flex; align-items: center; gap: 10px; min-height: 44px; padding: 9px 0; font-size: 14px; }
.tb-brand-links img { width: 24px; height: 24px; padding: 2px; object-fit: contain; flex-shrink: 0; background: #fff; border-radius: 3px; }
.tb-brand-links a > span { flex: 1; min-width: 0; }
.tb-brand-links .tb-icon { width: 11px; height: 11px; color: var(--tb-muted); }
.tb-topic { display: block; isolation: isolate; position: relative; overflow: hidden; min-height: 150px; margin-top: 12px; padding: 16px; border-radius: 6px; color: #fff !important; transition: box-shadow .18s ease; }
.tb-topic:hover { box-shadow: 0 5px 18px #10234b25; }
.tb-topic-kicker { font-size: 12px; }
.tb-topic strong { display: block; font-size: 22px; line-height: 1.5; margin: 9px 0 11px; font-weight: 700; }
.tb-topic-bottom { display: flex; align-items: center; justify-content: space-between; gap: 8px; font-size: 12px; }
.tb-topic-orange { background: linear-gradient(128deg,#c44f1b,#a73910); }
.tb-topic-orange::before { content: ''; position: absolute; z-index: -1; right: -65px; top: -10px; width: 210px; height: 210px; border: 1px solid #ffffff36; border-radius: 50%; box-shadow: 0 0 0 21px #ffffff08,0 0 0 42px #ffffff08; }
.tb-topic-dark { background: radial-gradient(ellipse at 100% 120%,#5c4b39,transparent 65%),#202d3e; }
.tb-topic-dark strong { color: #f5c294; }
.tb-topic-dark::before { content: ''; position: absolute; inset: 0; z-index: -1; opacity: .07; background-image: linear-gradient(#ffe0c0 1px,transparent 1px),linear-gradient(90deg,#ffe0c0 1px,transparent 1px); background-size: 24px 24px; }
.tb-status { position: fixed; left: 50%; bottom: 32px; transform: translateX(-50%); z-index: 1100; max-width: calc(100vw - 32px); padding: 12px 20px; border-radius: 5px; background: #252d37; color: #fff; font-size: 14px; line-height: 1.7; box-shadow: 0 4px 16px #0002; }
.tb-share-fallback { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; position: fixed; left: 50%; bottom: 96px; transform: translateX(-50%); z-index: 1100; width: min(500px,calc(100vw - 32px)); padding: 18px; background: var(--tb-paper); border: 1px solid var(--tb-line); border-radius: 5px; box-shadow: 0 4px 20px #0002; }
.tb-share-fallback label { flex-basis: 100%; color: var(--tb-ink); }
.tb-share-fallback input { flex: 1; min-width: 0; min-height: 44px; padding: 10px; font-size: 16px; color: var(--tb-ink); background: var(--tb-surface); border: 1px solid var(--tb-line); }
.tb-share-fallback button { min-height: 44px; padding: 8px 14px; border: 1px solid var(--tb-line); color: var(--tb-ink); background: var(--tb-surface); }
.io-black-mode .tieqi-brand-page { --tb-ink: #e4e8f0; --tb-muted: #a9b3c0; --tb-accent: #ffaf78; --tb-hover: #3a302b; --tb-line: #373e49; --tb-surface: #2b3039; --tb-paper: #1b222b; --tb-prose: #c4cedd; background: var(--tb-paper); color: var(--tb-ink); }
.io-black-mode .tb-logo-panel { background: #2a303c; }
.io-black-mode .tb-logo-stat .tb-icon, .io-black-mode .tb-favorite svg { background: #ffffff12; }
.io-black-mode .tb-brand-badge, .io-black-mode .tb-tags a { background: #393229; color: #efc6a9; }
.io-black-mode .tb-page .tb-summary { color: #b6c0cf; }
.io-black-mode .tb-page .tb-button-primary, .io-black-mode .tb-tabs a.is-active { background: #b8470f; color: #fff; }
.io-black-mode .tb-page .tb-button-primary:hover { background: #a43b09; }
.io-black-mode .tb-button-secondary { background: #353d4a; color: #c4cede; }
.io-black-mode .tb-model-image { background: #eff2f5; }
.io-black-mode .tb-model-kind { color: #596574; }
.io-black-mode .tieqi-brand-page .logo-light { display: inline-block !important; }
.io-black-mode .tieqi-brand-page .logo-expanded .logo-light, .io-black-mode .tieqi-brand-page .navbar-brand .logo-light, .io-black-mode .tieqi-brand-page .footer-logo .logo-light { background: #fff; border-radius: 4px; padding: 2px; }
@container(min-width:800px) { .tb-news-grid, .tb-related-grid { grid-template-columns: repeat(4,minmax(0,1fr)); } }
@container(max-width:590px) { .tb-facts { grid-template-columns: minmax(0,1fr); } }
@media(max-width:1199px) {
  .tieqi-brand-page #content.tb-page { padding: 28px 26px 44px; }
  .tb-reading-layout { grid-template-columns: 148px minmax(0,1fr); gap: 24px; }
  .tb-main-layout { grid-template-columns: minmax(0,1fr); }
  .tb-hero { gap: 22px; }
  .tb-aside { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 28px; padding-top: 36px; margin-top: 36px; border-top: 1px solid var(--tb-line); }
  .tb-rail-section { margin-bottom: 0; }
  .tb-model-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
}
@media(max-width:991px) {
  .tb-reading-layout { display: block; }
  .tb-outline { margin-bottom: 24px; }
  .tb-enhanced .tb-outline { position: sticky; top: 84px; z-index: 20; }
  .tb-outline-inner { position: static; padding: 0; border: 1px solid var(--tb-line); border-radius: 7px; background: var(--tb-paper); box-shadow: 0 3px 12px #253b6010; }
  .tb-outline-inner summary { margin: 0; padding: 10px 14px; min-height: 48px; }
  .tb-outline-current { display: block; flex: 1; min-width: 0; text-align: right; font-size: 12px; font-weight: 400; color: var(--tb-muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .tb-outline-chevron { margin-left: 0; }
  .tb-outline-scroll { max-height: min(55dvh,440px); margin: 0 12px 12px; padding-top: 6px; border-top: 1px solid var(--tb-line); }
  .tb-outline-list { border-left: 0; }
  .tb-outline-list a { border-radius: 4px; }
  .tb-outline-list a.is-active::before { left: 0; }
  .tieqi-brand-page { --tb-anchor-offset: 146px; }
  .tb-model-grid { grid-template-columns: repeat(3,minmax(0,1fr)); }
}
@media(max-width:575px) {
  .tieqi-brand-page #content.tb-page { padding: 20px 18px 36px; }
  .tb-breadcrumb { font-size: 12px; margin-bottom: 20px; }
  .tb-outline { margin-bottom: 22px; }
  .tb-hero { grid-template-columns: minmax(0,1fr); gap: 20px; margin-bottom: 20px; }
  .tb-hero::before { display: none; }
  .tb-logo-panel { width: 200px; height: 200px; justify-self: start; }
  .tb-hero-copy { padding-top: 2px; }
  .tb-title-line h1 { font-size: 26px; }
  .tb-brand-badge { font-size: 11px; padding: 2px 6px; }
  .tb-brand-meta { font-size: 12px; gap: 5px; margin-top: 8px; }
  .tb-page .tb-updated { font-size: 12px; }
  .tb-page .tb-summary { font-size: 16px; line-height: 1.85; margin: 12px 0; }
  .tb-actions { gap: 6px; }
  .tb-button { font-size: 13px; padding: 10px; gap: 5px; }
  .tb-text-link { font-size: 13px; padding: 6px; }
  .tb-tags { margin-bottom: 20px; gap: 5px; }
  .tb-tags a { padding: 5px 7px; }
  .tb-tabs { gap: 0; }
  .tb-tabs a { flex: 1; padding: 12px 9px; font-size: 13px; white-space: nowrap; }
  .tb-facts { padding: 17px 15px; gap: 10px; font-size: 14px; }
  .tb-section { margin-top: 30px; }
  .tb-profile { margin-top: 0; }
  .tb-section-heading { margin-bottom: 16px; gap: 8px; }
  .tb-section-heading h2 { font-size: 19px; gap: 6px; }
  .tb-section-heading .tb-text-link { font-size: 12px; }
  .tb-prose h3 { font-size: 18px; }
  .tb-series-grid, .tb-model-grid, .tb-news-grid, .tb-related-grid { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 10px; }
  .tb-series-card { padding: 14px 12px; }
  .tb-model-image { aspect-ratio: 1.3; padding: 26px 6px 8px; }
  .tb-model-body { padding: 12px 10px 0; }
  .tb-model-brand { font-size: 11px; }
  .tb-model-body h3 { font-size: 17px; }
  .tb-page .tb-model-price { font-size: 14px; }
  .tb-model-footer { flex-direction: column; align-items: start; font-size: 11px; gap: 5px; }
  .tb-news-card { padding: 14px 12px; min-height: 158px; }
  .tb-related-brand { padding: 12px 9px; gap: 8px; min-height: 88px; }
  .tb-related-brand img { width: 32px; height: 32px; }
  .tb-related-brand h3 { font-size: 13px; }
  .tb-related-brand div > span { font-size: 11px; }
  .tb-related-brand > .tb-icon { display: none; }
  .tb-wide-banner { min-height: 148px; padding: 20px; margin-top: 30px; gap: 12px; }
  .tb-wide-banner strong { font-size: 20px; }
  .tb-page .tb-wide-banner p { font-size: 13px; }
  .tb-banner-bike { right: 26px; }
  .tb-banner-arrow { width: 28px; height: 28px; }
  .tb-aside { display: block; padding-top: 30px; }
  .tb-aside .tb-rail-section:first-child { display: none; }
  .tb-topics { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 10px; }
  .tb-topics h2 { grid-column: 1 / -1; margin-bottom: 0; }
  .tb-topic { margin: 0; padding: 16px 12px; }
  .tb-topic strong { font-size: 18px; }
  .tb-topic-kicker, .tb-topic-bottom { font-size: 11px; }
  .tb-skip { left: 16px; }
}
@media(max-width:359px) { .tb-model-grid, .tb-series-grid, .tb-related-grid { grid-template-columns: minmax(0,1fr); } }
@media(prefers-reduced-motion:reduce) { .tb-page *, .tb-page *::before { transition: none !important; animation: none !important; scroll-behavior: auto !important; } }