:root {
  --catalog-ink: #171716;
  --catalog-paper: #f6f3ed;
  --catalog-white: #fff;
  --catalog-red: #9f2f47;
  --catalog-yellow: #d2a513;
  --catalog-muted: #6c6963;
  --catalog-line: rgba(23, 23, 22, .16);
}

.product-page { color: var(--catalog-ink); background: var(--catalog-paper); }
.product-page .site-header { color: var(--catalog-ink); border-bottom: 1px solid var(--catalog-line); background: rgba(255, 255, 255, .94); backdrop-filter: blur(18px); }
.product-page .site-header::before { display: none; }
.product-page .site-header.scrolled { background: rgba(255, 255, 255, .95); }

.brand-catalog { padding: clamp(8.5rem, 11vw, 11rem) var(--edge) clamp(5rem, 8vw, 8rem); }
.brand-catalog__head { display: grid; grid-template-columns: 1.35fr .65fr; gap: clamp(3rem, 8vw, 9rem); align-items: end; margin-bottom: clamp(3rem, 5vw, 5rem); }
.brand-catalog__breadcrumb { display: flex; gap: .65rem; margin-bottom: clamp(2.5rem, 5vw, 4.5rem); color: var(--catalog-muted); font-size: .72rem; letter-spacing: .12em; }
.brand-catalog__breadcrumb a { text-decoration: none; }
.brand-catalog__head > div:first-child > p { margin: 0 0 1.2rem; color: var(--catalog-red); font: 700 .7rem/1.4 Arial, sans-serif; letter-spacing: .23em; }
.brand-catalog h1 { max-width: 12em; margin: 0; font: 400 clamp(3.2rem, 5vw, 6.1rem)/1.03 STSong, "Noto Serif SC", serif; letter-spacing: -.065em; }
.brand-catalog h1 span { color: #77746d; }
.brand-catalog__intro { padding-top: 1.3rem; border-top: 1px solid var(--catalog-ink); }
.brand-catalog__intro strong { display: block; margin-bottom: 1rem; font: 400 clamp(1.25rem, 1.7vw, 1.7rem)/1.4 STSong, "Noto Serif SC", serif; }
.brand-catalog__intro p { margin: 0; color: var(--catalog-muted); font-size: .9rem; line-height: 2; }

.brand-card-grid { display: grid; grid-template-columns: 1fr; width: calc(100% + 2 * var(--edge)); margin-right: calc(var(--edge) * -1); margin-left: calc(var(--edge) * -1); gap: 0; }
.brand-card { position: relative; display: block; min-width: 0; min-height: 100svh; overflow: hidden; color: var(--catalog-ink); border-top: 1px solid rgba(255,255,255,.45); border-bottom: 1px solid rgba(23,23,22,.2); background: #d8d3c9; text-decoration: none; isolation: isolate; }
.brand-card--feature, .brand-card--wide { grid-column: auto; grid-row: auto; }
.brand-card__image { position: absolute; z-index: -2; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform .8s cubic-bezier(.2,.7,.2,1), filter .45s; }
.brand-card:nth-child(1) .brand-card__image { object-position: 47% center; }
.brand-card:nth-child(2) .brand-card__image { object-position: 42% center; }
.brand-card:nth-child(3) .brand-card__image { object-position: center; }
.brand-card:nth-child(4) .brand-card__image { object-position: center; }
.brand-card:nth-child(5) .brand-card__image { object-position: center; }
.brand-card__shade { position: absolute; z-index: -1; inset: 0; background: linear-gradient(180deg, rgba(12, 12, 11, .38), transparent 45%, rgba(12, 12, 11, .12)); }
.brand-card__meta { display: flex; justify-content: space-between; gap: 1rem; padding: 1.5rem 1.7rem; color: #fff; font-size: .64rem; font-weight: 700; letter-spacing: .15em; text-shadow: 0 1px 12px rgba(0,0,0,.42); }
.brand-card__panel { position: absolute; right: clamp(1rem, 2.5vw, 2.5rem); bottom: clamp(1rem, 2.5vw, 2.5rem); left: clamp(1rem, 2.5vw, 2.5rem); display: grid; grid-template-columns: minmax(10rem, .68fr) minmax(18rem, 1.25fr) auto; gap: clamp(1.5rem, 3vw, 4rem); align-items: center; min-height: 9.5rem; padding: 1.5rem clamp(1.4rem, 2.5vw, 2.5rem); border: 1px solid rgba(23,23,22,.14); background: rgba(255, 255, 255, .94); backdrop-filter: blur(18px); transition: background .3s, transform .35s; }
.brand-card__logo { display: flex; align-items: center; width: min(11rem, 100%); height: 4.2rem; }
.brand-card__logo img { width: 100%; max-height: 4rem; object-fit: contain; object-position: left center; }
.brand-card__logo--wide { width: min(13rem, 100%); }
.brand-card__logo--invert img { filter: invert(1); }
.brand-card__wordmark { display: flex; align-items: baseline; gap: .45rem; font: 800 clamp(1.5rem, 2.2vw, 2.5rem)/1 Arial, sans-serif; letter-spacing: -.045em; white-space: nowrap; }
.brand-card__wordmark b:last-child { color: var(--catalog-yellow); }
.brand-card__panel div { display: grid; align-content: center; gap: .7rem; }
.brand-card__panel strong { font: 400 clamp(1.45rem, 2vw, 2.15rem)/1.2 STSong, "Noto Serif SC", serif; letter-spacing: .015em; }
.brand-card__panel small { color: var(--catalog-muted); font-size: .75rem; line-height: 1.6; letter-spacing: .08em; }
.brand-card__enter { align-self: stretch; display: flex; justify-content: space-between; align-items: center; gap: 1.5rem; min-width: 9.5rem; padding-left: 1.5rem; border-left: 1px solid var(--catalog-line); font-size: .72rem; font-weight: 700; letter-spacing: .1em; white-space: nowrap; }
.brand-card__enter i { font: normal 1rem/1 Arial, sans-serif; transition: transform .25s; }
.brand-card:hover .brand-card__image { filter: saturate(1.08); transform: scale(1.035); }
.brand-card:hover .brand-card__panel { background: #fff; transform: translateY(-.3rem); }
.brand-card:hover .brand-card__enter { color: var(--catalog-red); }
.brand-card:hover .brand-card__enter i { transform: translateX(.35rem); }
.brand-card:focus-visible { outline: 3px solid var(--catalog-yellow); outline-offset: 3px; }

.brand-catalog__note { display: grid; grid-template-columns: auto minmax(15rem, 1fr) auto; gap: 1.5rem; align-items: baseline; margin-top: 1.5rem; padding: 1.3rem 0; border-top: 1px solid var(--catalog-line); border-bottom: 1px solid var(--catalog-line); }
.brand-catalog__note > span { color: var(--catalog-red); font-size: .67rem; font-weight: 700; letter-spacing: .14em; }
.brand-catalog__note p { max-width: 48rem; margin: 0; color: var(--catalog-muted); font-size: .76rem; line-height: 1.8; }
.brand-catalog__note a { font-size: .7rem; font-weight: 700; letter-spacing: .08em; text-decoration: none; white-space: nowrap; }
.brand-catalog__note i { margin-left: .7rem; font-style: normal; }

/* 产品选择模拟器 */
.simulator-page { overflow-x: hidden; }
.product-simulator { display: grid; grid-template-columns: minmax(25rem, 43%) minmax(35rem, 57%); min-height: 100svh; padding-top: 5.25rem; background: #fff; }
.simulator-visual { position: relative; min-height: calc(100svh - 5.25rem); overflow: hidden; color: #fff; background: #827968; }
.simulator-visual > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: 47% center; }
.simulator-visual__veil { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(13,13,12,.45), rgba(13,13,12,.08) 42%, rgba(13,13,12,.65)); }
.simulator-visual__content { position: relative; z-index: 1; display: grid; grid-template-rows: auto auto 1fr auto; min-height: 100%; padding: clamp(2rem, 4vw, 4.5rem); }
.simulator-breadcrumb { display: flex; gap: .65rem; color: rgba(255,255,255,.75); font-size: .68rem; letter-spacing: .12em; }
.simulator-breadcrumb a { text-decoration: none; }
.simulator-visual__kicker { margin: clamp(2rem, 5vh, 4.5rem) 0 0; font: 700 .68rem/1.4 Arial, sans-serif; letter-spacing: .23em; }
.simulator-visual__message { align-self: center; max-width: 40rem; }
.simulator-visual__message > span { display: block; margin-bottom: 1.25rem; color: #f0c43d; font-size: .66rem; font-weight: 700; letter-spacing: .15em; }
.simulator-visual__message h1 { margin: 0; font: 400 clamp(2.8rem, 4.6vw, 5.7rem)/1.05 STSong, "Noto Serif SC", serif; letter-spacing: -.06em; }
.simulator-visual__message p { max-width: 34rem; margin: 1.6rem 0 0; color: rgba(255,255,255,.84); font-size: .86rem; line-height: 1.9; }
.simulator-visual__content aside { display: grid; grid-template-columns: auto 1fr; gap: 1rem; align-items: baseline; padding-top: 1rem; border-top: 1px solid rgba(255,255,255,.4); font-size: .67rem; line-height: 1.7; }
.simulator-visual__content aside strong { color: #f0c43d; letter-spacing: .12em; white-space: nowrap; }
.simulator-visual__content aside span { color: rgba(255,255,255,.72); }

.simulator-workspace { display: grid; grid-template-rows: auto 1fr; min-width: 0; min-height: calc(100svh - 5.25rem); padding: clamp(1.5rem, 3vw, 3.5rem) clamp(1.5rem, 4.5vw, 5.5rem); background: var(--catalog-paper); }
.simulator-progress { display: grid; grid-template-columns: auto minmax(10rem, 1fr) auto; gap: 1.5rem; align-items: center; padding-bottom: 1.3rem; border-bottom: 1px solid var(--catalog-line); }
.simulator-progress > span { color: var(--catalog-red); font-size: .68rem; font-weight: 700; letter-spacing: .14em; white-space: nowrap; }
.simulator-progress ol { display: grid; grid-template-columns: repeat(5, 1fr); gap: .35rem; margin: 0; padding: 0; list-style: none; }
.simulator-progress li { height: 3px; background: rgba(23,23,22,.13); transition: background .25s; }
.simulator-progress li.is-active { background: var(--catalog-red); }
.simulator-progress li.is-complete { background: var(--catalog-ink); }
.simulator-progress button { padding: .35rem 0; border: 0; border-bottom: 1px solid transparent; color: var(--catalog-muted); background: transparent; font-size: .65rem; letter-spacing: .08em; cursor: pointer; }
.simulator-progress button:hover { color: var(--catalog-ink); border-bottom-color: currentColor; }
.simulator-stage { align-self: center; width: 100%; max-width: 58rem; margin: 0 auto; padding: clamp(2rem, 4vh, 4rem) 0 1rem; }
.simulator-form[hidden], .simulator-result[hidden] { display: none; }
.simulator-question { animation: simulatorIn .35s ease both; }
.simulator-question__head p { margin: 0 0 1rem; color: var(--catalog-red); font-size: .67rem; font-weight: 700; letter-spacing: .16em; }
.simulator-question__head h2 { margin: 0; font: 400 clamp(2.4rem, 3.8vw, 4.5rem)/1.08 STSong, "Noto Serif SC", serif; letter-spacing: -.055em; }
.simulator-question__head > span { display: block; margin-top: .9rem; color: var(--catalog-muted); font-size: .82rem; line-height: 1.7; }
.simulator-options { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); margin-top: 2rem; border-top: 1px solid var(--catalog-line); border-left: 1px solid var(--catalog-line); }
.simulator-option { position: relative; display: grid; grid-template-columns: auto 1fr auto; grid-template-rows: auto auto; gap: .55rem .9rem; min-height: 7.2rem; padding: 1.1rem; color: var(--catalog-ink); border: 0; border-right: 1px solid var(--catalog-line); border-bottom: 1px solid var(--catalog-line); background: rgba(255,255,255,.58); text-align: left; cursor: pointer; transition: color .22s, background .22s, transform .22s; }
.simulator-option:nth-child(5) { grid-column: 1 / -1; }
.simulator-option > span { color: var(--catalog-red); font: 700 .58rem/1.4 Arial, sans-serif; letter-spacing: .1em; }
.simulator-option strong { font: 400 1.12rem/1.3 STSong, "Noto Serif SC", serif; letter-spacing: .04em; }
.simulator-option small { grid-column: 2 / 4; color: var(--catalog-muted); font-size: .68rem; line-height: 1.55; }
.simulator-option i { color: var(--catalog-muted); font: normal .58rem/1.4 Arial, sans-serif; letter-spacing: .08em; }
.simulator-option:hover { z-index: 1; background: #fff; transform: translateY(-2px); }
.simulator-option.is-selected { z-index: 2; color: #fff; background: var(--catalog-red); box-shadow: 0 12px 30px rgba(128,34,55,.16); }
.simulator-option.is-selected > span, .simulator-option.is-selected small, .simulator-option.is-selected i { color: rgba(255,255,255,.82); }
.simulator-option:focus-visible { z-index: 3; outline: 2px solid var(--catalog-ink); outline-offset: -3px; }
.simulator-controls { display: flex; justify-content: space-between; gap: 1rem; margin-top: 1.5rem; }
.simulator-controls button { min-height: 3.2rem; padding: .8rem 1.2rem; border: 1px solid var(--catalog-ink); background: transparent; font-size: .7rem; font-weight: 700; letter-spacing: .1em; cursor: pointer; }
.simulator-controls button:disabled { opacity: .28; cursor: not-allowed; }
.simulator-controls .simulator-next { min-width: 11rem; color: #fff; background: var(--catalog-ink); }
.simulator-next span { margin-left: 1.6rem; }

.simulator-result { animation: simulatorIn .42s ease both; }
.simulator-result__label { display: flex; justify-content: space-between; gap: 1rem; align-items: baseline; color: var(--catalog-red); font-size: .66rem; font-weight: 700; letter-spacing: .14em; }
.simulator-result__label strong { color: var(--catalog-ink); font-size: .74rem; }
.simulator-result h2 { max-width: 12em; margin: 1.2rem 0 .8rem; font: 400 clamp(2.8rem, 4.6vw, 5.6rem)/1.05 STSong, "Noto Serif SC", serif; letter-spacing: -.06em; }
.simulator-result__scope { margin: 0; color: var(--catalog-muted); font-size: .9rem; line-height: 1.8; }
.simulator-result__summary { display: grid; grid-template-columns: repeat(5, 1fr); margin-top: 2rem; border-top: 1px solid var(--catalog-line); border-left: 1px solid var(--catalog-line); }
.simulator-result__summary span { display: grid; gap: .55rem; min-height: 5.2rem; padding: .9rem; border-right: 1px solid var(--catalog-line); border-bottom: 1px solid var(--catalog-line); font-size: .72rem; }
.simulator-result__summary small { color: var(--catalog-red); font-size: .56rem; line-height: 1.5; letter-spacing: .08em; }
.simulator-result__risk { margin-top: 1.5rem; padding: 1.2rem 1.4rem; border-left: 3px solid var(--catalog-red); background: rgba(159,47,71,.055); }
.simulator-result__risk h3 { margin: 0 0 .7rem; font-size: .72rem; letter-spacing: .1em; }
.simulator-result__risk ul { display: grid; gap: .45rem; margin: 0; padding-left: 1rem; color: var(--catalog-muted); font-size: .7rem; line-height: 1.65; }
.simulator-result__actions { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 1.5rem; }
.simulator-result__actions a { display: inline-flex; justify-content: space-between; gap: 2rem; padding: .9rem 1.1rem; border: 1px solid var(--catalog-ink); font-size: .7rem; font-weight: 700; letter-spacing: .08em; text-decoration: none; }
.simulator-result__actions a:first-child { color: #fff; background: var(--catalog-ink); }

/* 材料知识导航器 */
.surface-guide .simulator-progress ol { grid-template-columns: repeat(3, 1fr); }
.surface-guide .simulator-stage { max-width: 61rem; padding-top: clamp(1.6rem, 3vh, 3rem); }
.surface-guide .simulator-visual > img { transition: opacity .32s ease, transform .8s ease; }
.surface-guide .simulator-visual > img.is-changing { opacity: .25; transform: scale(1.025); }
.surface-guide__content { animation: simulatorIn .38s ease both; }
.guide-heading > p { margin: 0 0 .85rem; color: var(--catalog-red); font-size: .66rem; font-weight: 700; letter-spacing: .17em; }
.guide-heading h2 { margin: 0; font: 400 clamp(2.65rem, 3.9vw, 4.7rem)/1.06 STSong, "Noto Serif SC", serif; letter-spacing: -.06em; }
.guide-heading > span { display: block; margin-top: .8rem; color: var(--catalog-muted); font-size: .8rem; line-height: 1.75; }
.guide-heading > button,
.guide-answer > button { margin: 0 0 1.15rem; padding: .35rem 0; color: var(--catalog-muted); border: 0; border-bottom: 1px solid var(--catalog-line); background: transparent; font-size: .66rem; letter-spacing: .08em; cursor: pointer; }
.guide-heading > button:hover,
.guide-answer > button:hover { color: var(--catalog-red); border-bottom-color: currentColor; }

.guide-directions { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .7rem; margin-top: 1.8rem; }
.guide-direction { position: relative; display: grid; align-content: end; min-height: clamp(13.2rem, 27vh, 17rem); overflow: hidden; padding: 1.25rem; color: #fff; border: 0; background: #706d66; text-align: left; cursor: pointer; isolation: isolate; }
.guide-direction > img { position: absolute; z-index: -2; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform .65s cubic-bezier(.2,.7,.2,1), filter .35s; }
.guide-direction__shade { position: absolute; z-index: -1; inset: 0; background: linear-gradient(180deg, rgba(12,12,11,.08), rgba(12,12,11,.78)); }
.guide-direction__number { position: absolute; top: 1rem; left: 1.15rem; color: rgba(255,255,255,.8); font: 700 .6rem/1 Arial, sans-serif; letter-spacing: .12em; }
.guide-direction__body { display: grid; gap: .45rem; max-width: 27rem; }
.guide-direction__body small { font: 700 .58rem/1.4 Arial, sans-serif; letter-spacing: .16em; }
.guide-direction__body strong { font: 400 clamp(1.65rem, 2.3vw, 2.55rem)/1.05 STSong, "Noto Serif SC", serif; }
.guide-direction__body em { color: rgba(255,255,255,.78); font: normal .68rem/1.65 Arial, "Microsoft YaHei", sans-serif; }
.guide-direction > i { display: flex; justify-content: space-between; gap: 1rem; align-items: center; margin-top: .9rem; padding-top: .75rem; border-top: 1px solid rgba(255,255,255,.4); font: normal 700 .62rem/1.4 Arial, "Microsoft YaHei", sans-serif; letter-spacing: .08em; }
.guide-direction > i b { font-size: .9rem; transition: transform .25s; }
.guide-direction--compare { grid-column: 1 / -1; min-height: clamp(7.8rem, 15vh, 9.5rem); }
.guide-direction--compare > img { object-position: center 56%; }
.guide-direction--compare .guide-direction__body { padding-right: 8rem; }
.guide-direction:hover > img { filter: saturate(1.08); transform: scale(1.045); }
.guide-direction:hover > i b { transform: translateX(.35rem); }
.guide-direction:focus-visible { outline: 3px solid var(--catalog-yellow); outline-offset: 3px; }

.guide-heading--topics h2 { font-size: clamp(2.35rem, 3.5vw, 4.1rem); }
.guide-topics { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); margin-top: 1.6rem; border-top: 1px solid var(--catalog-line); border-left: 1px solid var(--catalog-line); }
.guide-topics button { position: relative; display: grid; grid-template-columns: auto 1fr auto; grid-template-rows: auto auto; gap: .45rem .8rem; min-height: 5.7rem; padding: .95rem; color: var(--catalog-ink); border: 0; border-right: 1px solid var(--catalog-line); border-bottom: 1px solid var(--catalog-line); background: rgba(255,255,255,.52); text-align: left; cursor: pointer; transition: background .2s, color .2s, transform .2s; }
.guide-topics button > span { color: var(--catalog-red); font: 700 .56rem/1.4 Arial, sans-serif; }
.guide-topics button strong { font: 400 1.02rem/1.35 STSong, "Noto Serif SC", serif; letter-spacing: .025em; }
.guide-topics button small { grid-column: 2 / 4; color: var(--catalog-muted); font-size: .65rem; line-height: 1.5; }
.guide-topics button i { align-self: start; color: var(--catalog-muted); font: normal .57rem/1.4 Arial, sans-serif; white-space: nowrap; }
.guide-topics button:hover { z-index: 1; color: #fff; background: var(--catalog-red); transform: translateY(-2px); }
.guide-topics button:hover > span,
.guide-topics button:hover small,
.guide-topics button:hover i { color: rgba(255,255,255,.82); }
.guide-topics button:focus-visible { z-index: 2; outline: 2px solid var(--catalog-ink); outline-offset: -3px; }

.guide-answer > p { margin: .6rem 0 1rem; color: var(--catalog-red); font-size: .64rem; font-weight: 700; letter-spacing: .17em; }
.guide-answer h2 { margin: 0; font: 400 clamp(2.8rem, 4.5vw, 5.3rem)/1.04 STSong, "Noto Serif SC", serif; letter-spacing: -.06em; }
.guide-answer > strong { display: block; max-width: 42rem; margin-top: .75rem; color: var(--catalog-muted); font-size: .8rem; font-weight: 400; line-height: 1.7; }
.guide-answer ol { display: grid; grid-template-columns: repeat(3, 1fr); margin: 1.8rem 0 0; padding: 0; border-top: 1px solid var(--catalog-line); border-left: 1px solid var(--catalog-line); list-style: none; }
.guide-answer li { display: grid; align-content: start; gap: .9rem; min-height: 11rem; padding: 1.1rem; border-right: 1px solid var(--catalog-line); border-bottom: 1px solid var(--catalog-line); background: rgba(255,255,255,.46); }
.guide-answer li > span { color: var(--catalog-red); font: 700 .58rem/1 Arial, sans-serif; letter-spacing: .1em; }
.guide-answer li p { margin: 0; color: #45433f; font-size: .74rem; line-height: 1.85; }
.guide-answer > aside { display: grid; grid-template-columns: auto 1fr; gap: 1.2rem; margin-top: 1rem; padding: .9rem 1rem; border-left: 3px solid var(--catalog-red); background: rgba(159,47,71,.055); font-size: .68rem; line-height: 1.7; }
.guide-answer > aside b { white-space: nowrap; }
.guide-answer > aside span { color: var(--catalog-muted); }
.guide-answer__actions { display: flex; flex-wrap: wrap; gap: .65rem; margin-top: 1rem; }
.guide-answer__actions button,
.guide-answer__actions a { padding: .8rem 1rem; color: var(--catalog-ink); border: 1px solid var(--catalog-ink); background: transparent; font-size: .66rem; font-weight: 700; letter-spacing: .07em; text-decoration: none; cursor: pointer; }
.guide-answer__actions button { color: #fff; background: var(--catalog-ink); }
.guide-answer__actions a span { margin-left: 1.3rem; }

/* 产品介绍入口 */
.product-introduction-page { scroll-padding-top: 5.25rem; }
.product-intro-hero { display: grid; grid-template-columns: 1.12fr .88fr; gap: clamp(3rem, 8vw, 9rem); min-height: 78svh; padding: clamp(9rem, 13vw, 13rem) var(--edge) clamp(5rem, 8vw, 8rem); border-bottom: 1px solid var(--catalog-line); background: var(--catalog-paper); }
.product-intro-hero > * { min-width: 0; }
.product-intro-hero > div:first-child { display: grid; align-content: space-between; }
.product-intro-hero > div:first-child nav { display: flex; gap: .65rem; color: var(--catalog-muted); font-size: .68rem; letter-spacing: .12em; }
.product-intro-hero > div:first-child nav a { text-decoration: none; }
.product-intro-hero > div:first-child > p { align-self: end; margin: clamp(3rem, 8vh, 7rem) 0 1.2rem; color: var(--catalog-red); font-size: .66rem; font-weight: 700; letter-spacing: .2em; }
.product-intro-hero h1 { align-self: end; max-width: 11em; margin: 0; font: 400 clamp(4rem, 6.5vw, 8rem)/.98 STSong, "Noto Serif SC", serif; letter-spacing: -.075em; }
.product-intro-hero h1 span { color: #74716b; }
.product-intro-hero__side { align-self: end; padding-top: 1.4rem; border-top: 1px solid var(--catalog-ink); }
.product-intro-hero__side > strong { display: block; font: 400 clamp(1.35rem, 1.8vw, 1.85rem)/1.45 STSong, "Noto Serif SC", serif; }
.product-intro-hero__side > p { max-width: 36rem; margin: 1rem 0 2rem; color: var(--catalog-muted); font-size: .8rem; line-height: 1.9; }
.product-intro-hero__side nav { border-top: 1px solid var(--catalog-line); }
.product-intro-hero__side nav a { display: grid; grid-template-columns: 2rem 1fr auto; gap: .8rem; align-items: center; padding: .9rem 0; border-bottom: 1px solid var(--catalog-line); font: 400 .86rem/1.4 STSong, "Noto Serif SC", serif; text-decoration: none; transition: color .2s, padding .2s; }
.product-intro-hero__side nav a::after { content: "↓"; font: 400 .75rem/1 Arial, sans-serif; }
.product-intro-hero__side nav a span { color: var(--catalog-red); font: 700 .57rem/1 Arial, sans-serif; letter-spacing: .08em; }
.product-intro-hero__side nav a:hover { padding-left: .45rem; color: var(--catalog-red); }

.product-family-list { background: #fff; }
.product-family { display: grid; grid-template-columns: minmax(19rem, 35%) minmax(0, 65%); gap: clamp(2rem, 4vw, 5rem); min-height: 74svh; padding: clamp(2rem, 4vw, 4.5rem); scroll-margin-top: 5.25rem; border-bottom: 1px solid var(--catalog-line); background: #fff; }
.product-family:nth-child(even) { background: #f1eee7; }
.product-family > figure { position: relative; align-self: center; width: 100%; min-height: 0; aspect-ratio: 4 / 5; overflow: hidden; margin: 0; background: #d4d0c8; }
.product-family > figure::after { position: absolute; inset: 0; background: linear-gradient(180deg, transparent 62%, rgba(13,13,12,.48)); content: ""; }
.product-family > figure img { width: 100%; height: 100%; object-fit: cover; transition: transform .8s cubic-bezier(.2,.7,.2,1); }
.product-family:hover > figure img { transform: scale(1.025); }
.product-family > figure figcaption { position: absolute; z-index: 1; right: 1.5rem; bottom: 1.4rem; left: 1.5rem; color: rgba(255,255,255,.86); font-size: .62rem; letter-spacing: .12em; }
.product-family--reverse { grid-template-columns: minmax(0, 65%) minmax(19rem, 35%); }
.product-family--reverse > figure { order: 2; }
.product-family__content { display: grid; grid-template-rows: 1fr auto auto; align-content: center; min-width: 0; padding: clamp(1rem, 2vw, 2.5rem) 0; background: transparent; }
.product-family__content header { align-self: end; max-width: 48rem; }
.product-family__content header > span { display: block; margin-bottom: 1.4rem; color: var(--catalog-red); font: 700 .64rem/1.4 Arial, sans-serif; letter-spacing: .18em; }
.product-family__wordmark { margin-bottom: 1.4rem; font: 800 clamp(1.8rem, 2.5vw, 3rem)/1 Arial, sans-serif; letter-spacing: -.045em; }
.product-family__wordmark b { color: var(--catalog-yellow); }
.product-family__logo { display: block; width: min(12rem, 48%); max-height: 3.2rem; margin-bottom: 1.5rem; object-fit: contain; object-position: left center; }
.product-family__logo--wide { width: min(17rem, 62%); }
.product-family__logo--durite { width: min(7rem, 32%); max-height: 4rem; }
.product-family__content h2 { margin: 0; font: 400 clamp(3.1rem, 5vw, 6.1rem)/1.02 STSong, "Noto Serif SC", serif; letter-spacing: -.07em; }
.product-family__content header > p { max-width: 42rem; margin: 1.2rem 0 0; color: var(--catalog-muted); font-size: .82rem; line-height: 1.9; }
.product-family__range { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: clamp(2.5rem, 5vh, 4.5rem); border-top: 1px solid var(--catalog-line); border-left: 1px solid var(--catalog-line); }
.product-family__range section { min-height: 9.5rem; padding: 1.2rem; border-right: 1px solid var(--catalog-line); border-bottom: 1px solid var(--catalog-line); background: rgba(255,255,255,.4); }
.product-family__range small { display: block; min-height: 1.5rem; color: var(--catalog-red); font: 700 .56rem/1.4 Arial, sans-serif; letter-spacing: .1em; }
.product-family__range strong { display: block; margin: .85rem 0 .65rem; font: 400 1.05rem/1.4 STSong, "Noto Serif SC", serif; }
.product-family__range p { margin: 0; color: var(--catalog-muted); font-size: .67rem; line-height: 1.75; }
.product-family__foot { display: flex; justify-content: space-between; gap: 2rem; align-items: center; padding-top: 1.3rem; }
.product-family__foot > span { max-width: 34rem; color: var(--catalog-muted); font-size: .66rem; line-height: 1.65; }
.product-family__foot a { flex: 0 0 auto; padding: .85rem 1rem; color: #fff; background: var(--catalog-ink); font-size: .64rem; font-weight: 700; letter-spacing: .07em; text-decoration: none; }
.product-family__foot i { margin-left: 1.4rem; font-style: normal; }

.product-intro-boundary { display: grid; grid-template-columns: auto 1fr auto; gap: clamp(1.5rem, 4vw, 5rem); align-items: center; padding: clamp(2rem, 4vw, 4rem) var(--edge); color: var(--catalog-ink); border-bottom: 1px solid var(--catalog-line); background: #fff; }
.product-intro-boundary > span { color: var(--catalog-red); font-size: .65rem; font-weight: 700; letter-spacing: .14em; white-space: nowrap; }
.product-intro-boundary p { max-width: 60rem; margin: 0; color: var(--catalog-muted); font-size: .73rem; line-height: 1.8; }
.product-intro-boundary a { padding-bottom: .35rem; border-bottom: 1px solid currentColor; font-size: .66rem; font-weight: 700; letter-spacing: .08em; text-decoration: none; white-space: nowrap; }
.product-intro-boundary i { margin-left: 1rem; font-style: normal; }

@keyframes simulatorIn { from { opacity: 0; transform: translateY(.7rem); } to { opacity: 1; transform: translateY(0); } }

.product-footer { color: var(--catalog-ink); border-top: 1px solid var(--catalog-line); background: #fff; }
.product-footer p { color: var(--catalog-ink); font-size: .79rem; opacity: .72; }
.product-footer .footer-links a { font-size: .78rem; }

@media (max-width: 1180px) {
  .brand-catalog__head { grid-template-columns: 1fr; gap: 2.5rem; }
  .brand-catalog h1 { max-width: 10em; }
  .brand-card-grid { grid-template-columns: 1fr; }
  .brand-card { min-height: 100svh; }
  .brand-card__panel { grid-template-columns: minmax(9rem, .55fr) 1fr auto; gap: 1.5rem; }
}

@media (max-width: 900px) {
  .brand-card__panel { grid-template-columns: 9rem 1fr; }
  .brand-card__enter { grid-column: 1 / -1; min-height: 2.7rem; padding: .7rem 0 0; border-top: 1px solid var(--catalog-line); border-left: 0; }
}

@media (max-width: 1000px) {
  .product-simulator { grid-template-columns: 1fr; padding-top: 4.7rem; }
  .simulator-visual { min-height: 52svh; }
  .simulator-visual__content { min-height: 52svh; }
  .simulator-visual__message { padding: 3rem 0; }
  .simulator-workspace { min-height: auto; }
  .product-intro-hero { grid-template-columns: 1fr; min-height: auto; }
  .product-intro-hero__side { align-self: auto; }
  .product-family,
  .product-family--reverse { grid-template-columns: 1fr; gap: 2.5rem; min-height: auto; padding: clamp(2rem, 6vw, 4rem); }
  .product-family > figure,
  .product-family--reverse > figure { order: 0; min-height: 0; aspect-ratio: 16 / 10; }
  .product-family__content { padding: 1rem 0; }
}

@media (max-width: 760px) {
  .product-page .site-header { min-height: 4.7rem; }
  .product-page .main-nav { color: #fff; }
  .brand-catalog { padding: 7.6rem 1rem 4rem; }
  .brand-catalog__head { margin-bottom: 2.5rem; }
  .brand-catalog__breadcrumb { margin-bottom: 2.5rem; }
  .brand-catalog h1 { font-size: clamp(2.8rem, 13vw, 4.5rem); }
  .brand-catalog__intro p { font-size: .84rem; }
  .brand-card-grid { grid-template-columns: 1fr; width: calc(100% + 2rem); margin-right: -1rem; margin-left: -1rem; gap: 0; }
  .brand-card, .brand-card--feature, .brand-card--wide { grid-column: 1; grid-row: auto; min-height: 100svh; }
  .brand-card__meta { padding: 1rem; }
  .brand-card__panel { right: .7rem; bottom: .7rem; left: .7rem; grid-template-columns: 1fr; grid-template-rows: 2.8rem auto auto; gap: .65rem; min-height: 13.5rem; padding: 1rem; }
  .brand-card__logo { height: 2.8rem; }
  .brand-card__logo img { max-height: 2.5rem; }
  .brand-card__wordmark { font-size: 1.6rem; }
  .brand-card__panel strong { font-size: 1.35rem; }
  .brand-card__panel small { font-size: .67rem; }
  .brand-card__enter { min-height: 2.4rem; }
  .brand-catalog__note { grid-template-columns: 1fr; gap: .7rem; }
  .brand-catalog__note a { white-space: normal; }
  .simulator-visual { min-height: 58svh; }
  .simulator-visual__content { min-height: 58svh; padding: 1.4rem 1rem 1.2rem; }
  .simulator-breadcrumb { display: none; }
  .simulator-visual__kicker { margin-top: 0; }
  .simulator-visual__message { align-self: end; padding: 2.4rem 0 1rem; }
  .simulator-visual__message h1 { font-size: clamp(2.55rem, 12vw, 4rem); }
  .simulator-visual__message p { font-size: .76rem; }
  .simulator-visual__content aside { display: none; }
  .simulator-workspace { padding: 1.2rem 1rem 2.5rem; }
  .simulator-progress { grid-template-columns: auto 1fr; gap: .8rem; }
  .simulator-progress button { grid-column: 1 / -1; justify-self: end; margin-top: -.4rem; }
  .simulator-stage { padding-top: 2.2rem; }
  .simulator-question__head h2 { font-size: clamp(2.2rem, 10vw, 3.4rem); }
  .simulator-options { grid-template-columns: 1fr; }
  .simulator-option, .simulator-option:nth-child(5) { grid-column: 1; min-height: 6.5rem; }
  .simulator-controls button { min-width: 0; }
  .simulator-controls .simulator-next { min-width: 9rem; }
  .simulator-result h2 { font-size: 3rem; }
  .simulator-result__summary { grid-template-columns: 1fr 1fr; }
  .simulator-result__actions { display: grid; }
  .guide-heading h2 { font-size: clamp(2.35rem, 10vw, 3.4rem); }
  .guide-directions { grid-template-columns: 1fr; }
  .guide-direction,
  .guide-direction--compare { grid-column: 1; min-height: 13rem; }
  .guide-direction--compare .guide-direction__body { padding-right: 0; }
  .guide-topics { grid-template-columns: 1fr; }
  .guide-topics button { min-height: 5.5rem; }
  .guide-answer h2 { font-size: 3.2rem; }
  .guide-answer ol { grid-template-columns: 1fr; }
  .guide-answer li { min-height: auto; }
  .guide-answer > aside { grid-template-columns: 1fr; gap: .35rem; }
  .guide-answer__actions { display: grid; }
  .product-intro-hero { padding: 7.8rem 1rem 4rem; }
  .product-intro-hero h1 { max-width: 100%; font-size: clamp(2.25rem, 9.4vw, 3.8rem); overflow-wrap: anywhere; }
  .product-intro-hero__side > p { overflow-wrap: anywhere; }
  .product-intro-hero__side { margin-top: 1rem; }
  .product-family { scroll-margin-top: 4.7rem; }
  .product-family { gap: 1.8rem; padding: 1rem 1rem 3rem; }
  .product-family > figure,
  .product-family--reverse > figure { min-height: 0; aspect-ratio: 4 / 3; }
  .product-family__content { padding: 1rem 0 0; }
  .product-family__content h2 { font-size: clamp(3rem, 14vw, 4.6rem); }
  .product-family__range { grid-template-columns: 1fr; }
  .product-family__range section { min-height: auto; }
  .product-family__foot { display: grid; gap: 1rem; }
  .product-family__foot a { text-align: center; }
  .product-intro-boundary { grid-template-columns: 1fr; padding: 2.2rem 1rem; gap: .8rem; }
  .product-intro-boundary a { justify-self: start; white-space: normal; }
}

@media (prefers-reduced-motion: reduce) { .brand-card__image, .brand-card__panel, .brand-card__enter i { transition: none; } }