:root {
  --paper: #f6f6f4;
  --white: #fff;
  --ink: #171716;
  --muted: #6f6d67;
  --line: #deddd8;
  --orange: #ee4c2a;
  --display: "Source Han Serif SC", "Noto Serif CJK SC", "Songti SC", SimSun, serif;
  --body: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", sans-serif;
  --utility: "DIN Alternate", "Arial Narrow", Arial, sans-serif;
  --content-max: 1050px;
  --header-max: var(--content-max);
  --page: min(var(--content-max), calc(100vw - 48px));
  --content-gutter: max(24px, calc((100vw - var(--content-max)) / 2));
  --ease: cubic-bezier(.22,.75,.18,1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: var(--body);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
body.menu-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
img { display: block; width: 100%; }
button { color: inherit; font: inherit; }
[hidden] { display: none !important; }
:focus-visible { outline: 2px solid var(--orange); outline-offset: 4px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr) 110px;
  align-items: center;
  width: var(--page);
  max-width: var(--content-max);
  min-height: 104px;
  margin: 0 auto;
  padding: 0;
  border-bottom: 1px solid rgba(23,23,22,.12);
  background: transparent;
  backdrop-filter: blur(16px);
}
.site-header::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: 0;
  right: 50%;
  bottom: 0;
  left: 50%;
  margin-right: -50vw;
  margin-left: -50vw;
  border-bottom: 1px solid rgba(23,23,22,.08);
  background: rgba(255,255,255,.96);
  box-shadow: 0 4px 16px rgba(23,23,22,.06);
  backdrop-filter: blur(16px);
}
.brand { display: inline-flex; align-items: center; gap: 12px; width: max-content; font-weight: 600; }
.brand-image-link {
  width: 190px;
  max-width: 22vw;
  height: 62px;
  overflow: hidden;
}
.brand-logo {
  display: block;
  width: auto;
  max-width: 100%;
  height: 58px;
  object-fit: contain;
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  aspect-ratio: 1;
  border: 1px solid;
  font-family: var(--display);
  font-size: 19px;
  transform: rotate(-5deg);
}
.main-nav {
  display: flex;
  justify-content: center;
  gap: clamp(34px,3.2vw,58px);
  color: #55534f;
  font-size: 17px;
  font-weight: 400;
  letter-spacing: .01em;
}
.main-nav a, .header-contact {
  position: relative;
  padding: 38px 0 34px;
  color: #55534f;
  transition: color .24s var(--ease);
}
.main-nav a::after, .header-contact::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 24px;
  left: 0;
  height: 2.5px;
  border-radius: 2px;
  background: var(--orange, #ee4c2a);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform .28s var(--ease), background-color .24s ease;
}
.main-nav a:hover, .header-contact:hover {
  color: var(--orange, #ee4c2a);
}
.main-nav a:hover::after, .header-contact:hover::after {
  transform: scaleX(1);
  background: var(--orange, #ee4c2a);
}
.main-nav a[aria-current="page"],
.main-nav a.is-active,
.main-nav a.active {
  color: var(--orange, #ee4c2a);
  font-weight: 500;
}
.main-nav a[aria-current="page"]::after,
.main-nav a.is-active::after,
.main-nav a.active::after {
  transform: scaleX(1);
  background: var(--orange, #ee4c2a);
}
.header-contact { justify-self: end; font-size: 17px; font-weight: 700; }
.menu-button { display: none; width: 42px; height: 42px; border: 1px solid var(--line); background: transparent; }
.menu-button span, .menu-button::before, .menu-button::after {
  display: block;
  width: 17px;
  height: 1px;
  margin: 5px auto;
  background: currentColor;
  content: "";
}

.page-hero {
  display: grid;
  grid-template-columns: minmax(0,1.16fr) minmax(360px,.62fr);
  min-height: 490px;
  border-bottom: 1px solid var(--line);
  background: var(--white);
}
.page-hero-copy { display: flex; flex-direction: column; justify-content: center; padding: clamp(70px,8vw,120px) var(--content-gutter); padding-right: 8vw; }
.eyebrow { margin: 0; color: var(--orange); font-family: var(--utility); font-size: 11px; letter-spacing: .2em; }
.page-hero h1 {
  max-width: 900px;
  margin: 22px 0 30px;
  font-family: var(--display);
  font-size: clamp(58px,8vw,122px);
  font-weight: 400;
  line-height: .95;
  letter-spacing: -.06em;
}
.page-hero-copy > p:last-child { max-width: 700px; margin: 0; color: var(--muted); font-size: 18px; }
.page-hero-media { position: relative; min-height: 490px; margin: 28px 28px 28px 0; overflow: hidden; background: var(--paper); }
.page-hero-media img { height: 100%; object-fit: cover; }
.page-hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg,transparent 50%,rgba(10,10,10,.45));
}
.page-hero-media::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  z-index: 2;
  width: 7px;
  height: 34%;
  background: var(--orange);
}
.page-hero-media span {
  position: absolute;
  right: 28px;
  bottom: 24px;
  z-index: 1;
  color: #fff;
  font-family: var(--utility);
  font-size: 11px;
  letter-spacing: .18em;
}

.page-tabs {
  position: relative;
  z-index: 3;
  display: flex;
  width: var(--page);
  margin: -1px auto 0;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  border-left: 1px solid var(--line);
  background: #fff;
}
.page-tabs a,
.page-tabs span {
  display: flex;
  flex: 1;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  padding: 0 24px;
  border-right: 1px solid var(--line);
  font-size: 14px;
}
.page-tabs a:last-child,
.page-tabs span:last-child { border-right: 0; }
.page-tabs small { color: var(--orange); font-family: var(--utility); letter-spacing: .1em; }
.page-tabs a { transition: color .24s var(--ease), background .24s var(--ease); }
.page-tabs a:hover { color: #fff; background: var(--orange); }
.page-tabs a:hover small { color: #fff; }

.section { width: var(--page); margin: 0 auto; padding: clamp(82px,10vw,150px) 0; }
.section-head {
  display: grid;
  grid-template-columns: minmax(0,1fr) minmax(280px,.54fr);
  gap: 60px;
  align-items: end;
  margin-bottom: clamp(48px,7vw,90px);
}
.section-head h2 {
  max-width: 920px;
  margin: 15px 0 0;
  font-family: var(--display);
  font-size: clamp(40px,5.7vw,82px);
  font-weight: 400;
  line-height: 1.08;
  letter-spacing: -.045em;
}
.section-head > p { margin: 0; color: var(--muted); }
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  width: max-content;
  padding-bottom: 6px;
  border-bottom: 1px solid;
  font-weight: 600;
}

.family {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0,1.08fr) minmax(360px,.72fr);
  min-height: 590px;
  margin-bottom: 28px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--white);
}
.family:nth-child(even) { grid-template-columns: minmax(360px,.72fr) minmax(0,1.08fr); }
.family:nth-child(even) .family-image { order: 2; }
.family-image img { height: 100%; object-fit: cover; transition: transform .8s var(--ease); }
.family:hover .family-image img { transform: scale(1.025); }
.family-copy { display: flex; flex-direction: column; justify-content: end; padding: clamp(42px,6vw,92px); }
.family-code { color: var(--orange); font-family: var(--utility); font-size: 11px; letter-spacing: .18em; }
.family h2 { margin: 20px 0 12px; font-family: var(--display); font-size: clamp(48px,6vw,88px); font-weight: 400; line-height: 1; }
.family-copy > p { max-width: 560px; margin: 0 0 32px; color: var(--muted); }
.tag-list { display: flex; flex-wrap: wrap; gap: 10px; margin: 0 0 38px; padding: 0; list-style: none; }
.tag-list li { padding: 7px 12px; border: 1px solid var(--line); font-size: 13px; }

.case-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 22px; }
.case-card { border: 1px solid var(--line); background: var(--white); transition: transform .28s var(--ease), border-color .28s var(--ease); }
.case-card:hover { transform: translateY(-6px); border-color: rgba(238,76,42,.5); }
.case-card img { aspect-ratio: 4/3; object-fit: cover; }
.case-copy { padding: 26px 26px 34px; }
.case-copy span, .article-meta { color: var(--orange); font-family: var(--utility); font-size: 11px; letter-spacing: .14em; }
.case-copy h2 { margin: 12px 0 8px; font-family: var(--display); font-size: 29px; font-weight: 400; line-height: 1.25; }
.case-copy p { margin: 0; color: var(--muted); font-size: 14px; }

.article-list { border-top: 1px solid var(--line); }
.article-row {
  display: grid;
  grid-template-columns: 140px minmax(0,1fr) auto;
  gap: 32px;
  align-items: center;
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}
.article-row img { aspect-ratio: 4/3; object-fit: cover; }
.article-row h2 { margin: 7px 0 4px; font-family: var(--display); font-size: clamp(23px,2.4vw,38px); font-weight: 400; line-height: 1.25; }
.article-row p { margin: 0; color: var(--muted); }
.article-row > span { font-size: 28px; }

.feature-story {
  display: grid;
  grid-template-columns: minmax(0,1.15fr) minmax(320px,.7fr);
  min-height: 470px;
  margin-bottom: 68px;
  border: 1px solid var(--line);
  background: var(--paper);
}
.feature-story-image { position: relative; overflow: hidden; }
.feature-story-image img { height: 100%; object-fit: cover; transition: transform .7s var(--ease); }
.feature-story:hover .feature-story-image img { transform: scale(1.025); }
.feature-story-copy { display: flex; flex-direction: column; justify-content: center; padding: clamp(34px,5vw,72px); }
.feature-story-copy h2 { margin: 18px 0 20px; font-family: var(--display); font-size: clamp(34px,4vw,60px); font-weight: 400; line-height: 1.14; }
.feature-story-copy p { margin: 0 0 30px; color: var(--muted); }

.about-lead { display: grid; grid-template-columns: minmax(0,1fr) minmax(320px,.55fr); gap: 70px; }
.about-lead h2 { margin: 0; font-family: var(--display); font-size: clamp(48px,7vw,98px); font-weight: 400; line-height: 1.08; letter-spacing: -.05em; }
.about-lead-copy { padding-top: 16px; }
.about-lead-copy p { margin: 0 0 24px; color: var(--muted); font-size: 17px; }
.about-values { display: grid; grid-template-columns: repeat(3,1fr); margin-top: 80px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.value-card { min-height: 260px; padding: 32px; border-right: 1px solid var(--line); }
.value-card:last-child { border-right: 0; }
.value-card span { color: var(--orange); font-family: var(--utility); font-size: 11px; letter-spacing: .16em; }
.value-card h3 { margin: 58px 0 12px; font-family: var(--display); font-size: 32px; font-weight: 400; }
.value-card p { margin: 0; color: var(--muted); }
.about-collage {
  display: grid;
  grid-template-columns: 1.2fr .72fr .72fr;
  gap: 18px;
  margin-top: 80px;
}
.about-collage figure { position: relative; min-height: 310px; margin: 0; overflow: hidden; background: var(--paper); }
.about-collage figure:first-child { min-height: 500px; grid-row: span 2; }
.about-collage img { height: 100%; object-fit: cover; }
.about-collage figcaption {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  padding: 18px 20px;
  color: #fff;
  background: linear-gradient(transparent,rgba(0,0,0,.68));
  font-size: 13px;
}
.scene-grid { display: grid; grid-template-columns: repeat(4,1fr); border: 1px solid var(--line); }
.scene-item { min-height: 150px; padding: 26px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.scene-item:nth-child(4n) { border-right: 0; }
.scene-item:nth-child(n+5) { border-bottom: 0; }
.scene-item span { display: block; margin-bottom: 34px; color: var(--orange); font-family: var(--utility); font-size: 11px; letter-spacing: .15em; }
.scene-item strong { font-size: 18px; }

.site-footer { padding: 44px 0 0; color: #ffffff; background: var(--orange, #ee4c2a); }
.footer-grid { display: grid; grid-template-columns: auto 1fr auto; gap: clamp(36px, 5vw, 76px); width: var(--page); margin: 0 auto; padding-bottom: 30px; align-items: center; }
.footer-brand { display: flex; align-items: center; }
.brand-logo-footer {
  width: auto;
  height: 108px;
  max-width: 135px;
  object-fit: contain;
  display: block;
}
.footer-nav { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 22px; margin-bottom: 16px; }
.footer-nav a { color: #ffffff; font-size: 14.5px; font-weight: 500; text-decoration: none; transition: opacity .22s var(--ease); }
.footer-nav a:hover { opacity: .8; }
.footer-contact { color: rgba(255,255,255,.88); }
.footer-contact p { margin: 4px 0; font-size: 13px; line-height: 1.6; }
.footer-contact span { display: inline-block; width: 44px; color: rgba(255,255,255,.95); font-weight: 500; }
.footer-qr { display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; }
.footer-qr-image { display: block; width: 92px; height: 92px; object-fit: contain; background: #fff; border-radius: 4px; padding: 4px; }
.footer-qr p { margin: 8px 0 0; color: rgba(255,255,255,.9); font-size: 12px; }
.footer-bottom-wrap { width: 100%; border-top: 1px solid rgba(255,255,255,.22); padding: 16px 0 18px; }
.footer-bottom { display: flex; justify-content: space-between; width: var(--page); margin: 0 auto; border-top: 0; padding-top: 0; color: rgba(255,255,255,.75); font-size: 12px; }
.footer-bottom a { color: inherit; transition: color .22s var(--ease); }
.footer-bottom a:hover { color: #fff; }
.footer-records { display: inline-flex; flex-wrap: wrap; gap: 10px; align-items: center; justify-content: flex-end; }
.footer-records i { color: rgba(255,255,255,.4); font-style: normal; }
.contact-dock { position: fixed; right: 24px; bottom: 30px; z-index: 60; display: flex; flex-direction: column; align-items: flex-end; gap: 14px; background: transparent !important; box-shadow: none !important; border: 0 none !important; }
.contact-trigger { display: flex; align-items: center; justify-content: center; width: 50px; height: 50px; border-radius: 50%; border: 0; background: #fff; box-shadow: 0 4px 18px rgba(0,0,0,0.08); cursor: pointer; }
.contact-trigger svg { width: 22px; height: 22px; }
.contact-item { position: relative; border: 0; }
.contact-popover {
  position: absolute;
  right: 58px;
  top: 50%;
  min-width: 210px;
  padding: 16px 18px;
  background: #fff;
  box-shadow: 0 10px 35px rgba(0,0,0,.14);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-50%) translateX(8px);
  transition: .2s ease;
}
.contact-popover span { display: block; color: var(--muted); font-size: 13px; }
.contact-qr-image { display: block; width: 132px; height: 132px; object-fit: contain; background: #fff; }
.contact-item.is-open .contact-popover, .contact-item:hover .contact-popover { opacity: 1; visibility: visible; transform: translateY(-50%); }

/* Compact directory pages */
.simple-title {
  width: var(--page);
  margin: 0 auto;
  padding: clamp(72px, 7vw, 108px) 0 clamp(50px, 5vw, 70px);
  text-align: center;
}
.simple-title h1 {
  margin: 0 0 9px;
  font-size: clamp(42px, 4.25vw, 58px);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -.035em;
}
.simple-title .eyebrow {
  color: var(--orange);
  font-size: 11px;
  letter-spacing: .34em;
}
.simple-title > p:last-child {
  max-width: 720px;
  margin: 24px auto 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.9;
}
.directory-section {
  width: var(--page);
  margin: 0 auto;
  padding: 0 0 clamp(92px, 8vw, 126px);
}
.directory-section.tinted {
  width: 100%;
  padding: clamp(62px, 6vw, 82px) var(--content-gutter) clamp(92px, 8vw, 126px);
  background: var(--paper);
}
.catalog-layout {
  display: grid;
  grid-template-columns: 248px minmax(0, 1fr);
  gap: clamp(46px, 5vw, 72px);
  align-items: start;
}
.catalog-nav {
  position: sticky;
  top: 112px;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}
.catalog-nav-head { padding: 0 0 24px; border-bottom: 1px solid var(--ink); }
.catalog-nav-head h2 { margin: 0 0 7px; font-size: 34px; line-height: 1.2; }
.catalog-nav-head span { color: var(--orange); font-family: var(--utility); font-size: 12px; letter-spacing: .28em; }
.catalog-nav a {
  display: flex;
  justify-content: space-between;
  padding: 18px 8px;
  border-bottom: 1px solid var(--line);
  font-size: 17px;
  transition: padding .25s var(--ease), color .25s var(--ease);
}
.catalog-nav a:last-child { border-bottom: 0; }
.catalog-nav a::after { content: "↗"; color: var(--orange); opacity: 0; }
.catalog-nav a:hover { padding-left: 18px; color: var(--orange); }
.catalog-nav a:hover::after { opacity: 1; }
.category-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px 22px;
}
.category-grid-full {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}
.category-card {
  min-width: 0;
  padding: 14px 14px 24px;
  background: var(--white);
  transition: transform .28s var(--ease), box-shadow .28s var(--ease);
}
.category-card:hover { transform: translateY(-4px); box-shadow: 0 14px 38px rgba(23,23,22,.07); }
.category-image { overflow: hidden; background: #e9e8e3; }
.category-card img {
  aspect-ratio: 1 / 1;
  object-fit: cover;
  transition: transform .55s var(--ease);
}
.category-card:hover img { transform: scale(1.025); }
.category-card h2 { margin: 18px 4px 7px; font-size: 22px; font-weight: 500; line-height: 1.35; }
.category-card p { min-height: 44px; margin: 0 4px; color: var(--muted); font-size: 13px; line-height: 1.7; }
.category-card .category-code { display: block; margin: 16px 4px 0; color: var(--orange); font-family: var(--utility); font-size: 10px; letter-spacing: .14em; }
.products-page .category-grid {
  grid-template-columns: 1fr;
  gap: 34px;
}
.category-section {
  scroll-margin-top: 112px;
  display: grid;
  grid-template-columns: minmax(260px, 320px) minmax(0, 1fr);
  background: var(--white);
  border: 1px solid var(--line);
}
.category-section-media {
  grid-row: 1 / span 2;
  overflow: hidden;
  background: #eceae4;
}
.category-section-media img {
  width: 100%;
  height: 100%;
  min-height: 340px;
  object-fit: cover;
}
.category-section-head {
  padding: 34px 36px 24px;
}
.category-section-head .category-code {
  display: block;
  margin-bottom: 18px;
  color: var(--orange);
  font-family: var(--utility);
  font-size: 10px;
  letter-spacing: .14em;
}
.category-section-head h2 {
  margin: 0 0 12px;
  font-size: clamp(28px, 3vw, 40px);
  line-height: 1.12;
  font-weight: 500;
}
.category-section-head p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}
.product-slot-grid {
  grid-column: 2;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line);
}
.product-slot {
  min-height: 152px;
  padding: 24px 28px 26px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.product-slot:nth-child(2n) { border-right: 0; }
.product-slot span {
  display: block;
  margin-bottom: 22px;
  color: var(--orange);
  font-family: var(--utility);
  font-size: 10px;
  letter-spacing: .18em;
}
.product-slot h3 {
  margin: 0 0 10px;
  font-size: 22px;
  line-height: 1.35;
  font-weight: 500;
}
.product-slot p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}

.products-page .category-grid {
  display: block;
}
.product-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  margin-bottom: 34px;
}
.product-condition {
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 46px;
  color: var(--ink);
  font-size: 15px;
}
.product-condition[hidden] {
  display: none;
}
.product-condition span {
  color: var(--ink);
  font-weight: 500;
}
.product-condition em {
  color: var(--muted);
  font-style: normal;
}
.condition-chip {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  min-height: 46px;
  padding: 0 18px;
  border: 1px solid var(--line);
  background: #fff;
  cursor: pointer;
  transition: border-color .22s var(--ease), color .22s var(--ease);
}
.condition-chip:hover {
  border-color: var(--orange);
  color: var(--orange);
}
.condition-chip strong {
  font-weight: 500;
}
.condition-chip i {
  color: #aaa7a0;
  font-style: normal;
  font-size: 21px;
  line-height: 1;
}
.product-search {
  position: relative;
  display: block;
  width: min(340px, 100%);
}
.product-search input {
  width: 100%;
  height: 48px;
  padding: 0 54px 0 18px;
  border: 1px solid var(--line);
  border-radius: 0;
  background: #fff;
  color: var(--ink);
  font: inherit;
  font-size: 14px;
}
.product-search input::placeholder {
  color: #96938c;
}
.product-search svg {
  position: absolute;
  top: 50%;
  right: 18px;
  width: 22px;
  height: 22px;
  stroke-width: 2.4;
  transform: translateY(-50%);
  pointer-events: none;
}
.product-list-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px 22px;
}
.product-list-card {
  display: block;
  text-decoration: none;
  color: inherit;
  min-width: 0;
  padding: 18px 18px 28px;
  background: var(--white);
  text-align: center;
  transition: transform .28s var(--ease), box-shadow .28s var(--ease);
}
.product-list-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 38px rgba(23,23,22,.07);
}
.product-list-image {
  display: grid;
  place-items: center;
  aspect-ratio: 1 / 1;
  overflow: hidden;
  background: #ecebe6;
}
.product-list-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .55s var(--ease);
}
.product-list-card:hover .product-list-image img {
  transform: scale(1.025);
}
.product-list-card h2 {
  margin: 22px 0 0;
  font-size: 16px;
  font-weight: 400;
  line-height: 1.35;
}
.product-empty {
  margin: 40px 0 0;
  padding: 40px 24px;
  border: 1px dashed var(--line);
  color: var(--muted);
  background: #fff;
  text-align: center;
}
.catalog-nav a.is-active {
  padding-left: 18px;
  color: var(--orange);
}
.catalog-nav a.is-active::after {
  opacity: 1;
}

.simple-case-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(42px, 4vw, 64px) clamp(22px, 2.4vw, 34px);
}
.simple-case-card { min-width: 0; }
.simple-case-card .case-image { overflow: hidden; background: #ecebe6; aspect-ratio: 1 / 1; }
.simple-case-card img { width: 100%; height: 100%; object-fit: cover; transition: transform .55s var(--ease); }
.simple-case-card:hover img { transform: scale(1.025); }
.simple-case-card h2 { margin: 18px 0 8px; font-size: 18px; font-weight: 500; line-height: 1.35; }
.simple-case-card .case-series { display: block; margin-bottom: 10px; color: var(--orange); font-size: 13px; font-weight: 500; letter-spacing: .04em; }
.simple-case-card .case-subtitle { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.85; }

.compact-article-list { border-top: 1px solid var(--line); }
.compact-article {
  display: grid;
  grid-template-columns: 270px minmax(0, 1fr) 118px;
  gap: clamp(26px, 3.5vw, 48px);
  align-items: center;
  padding: 34px 0;
  border-bottom: 1px solid var(--line);
}
.compact-article-image { overflow: hidden; background: #ecebe6; }
.compact-article img { aspect-ratio: 1.55 / 1; object-fit: cover; transition: transform .55s var(--ease); }
.compact-article:hover img { transform: scale(1.025); }
.compact-article h2 { margin: 0 0 10px; font-size: clamp(21px, 2vw, 29px); font-weight: 500; line-height: 1.42; }
.compact-article p { margin: 0; color: var(--muted); font-size: 13px; }
.compact-article time { align-self: start; padding-top: 6px; color: #9a9891; font-size: 14px; text-align: right; }
.compact-article .article-meta { display: block; margin-bottom: 12px; }

.about-summary {
  display: grid;
  grid-template-columns: minmax(360px, .78fr) minmax(0, 1.22fr);
  gap: clamp(48px, 7vw, 94px);
  align-items: center;
}
.about-summary-visual { position: relative; min-height: 430px; overflow: hidden; }
.about-summary-visual img { position: absolute; inset: 0; height: 100%; object-fit: cover; }
.about-summary-copy h2 { margin: 0 0 24px; font-family: var(--body); font-size: clamp(40px, 4.2vw, 58px); font-weight: 500; line-height: 1.16; letter-spacing: -.035em; }
.about-summary-copy p { max-width: 720px; margin: 0 0 18px; color: var(--muted); font-size: 15px; }
.about-facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 58px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.about-fact { min-height: 190px; padding: 28px 28px 32px; border-right: 1px solid var(--line); }
.about-fact:last-child { border-right: 0; }
.about-fact span { color: var(--orange); font-family: var(--utility); font-size: 11px; letter-spacing: .14em; }
.about-fact h3 { margin: 26px 0 8px; font-size: 22px; font-weight: 500; }
.about-fact p { margin: 0; color: var(--muted); font-size: 14px; }
.section.partner-section {
  width: 100%;
  margin: 0;
  padding: clamp(72px, 7vw, 96px) 0 clamp(92px, 8vw, 126px);
  background: var(--paper);
}
.partner-head {
  display: flex;
  justify-content: space-between;
  gap: 50px;
  align-items: end;
  width: var(--page);
  margin: 0 auto 50px;
}
.partner-head h2 { margin: 8px 0 0; font-size: clamp(34px, 3.7vw, 50px); font-weight: 500; }
.partner-head > p { max-width: 520px; margin: 0; color: var(--muted); }
.partner-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  width: var(--page);
  margin: 0 auto;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.partner-slot {
  display: grid;
  min-height: 138px;
  padding: 24px;
  place-items: center;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: #fff;
  text-align: center;
}
.partner-slot strong { font-family: var(--utility); font-size: 18px; letter-spacing: .12em; }
.partner-slot span { display: block; margin-top: 8px; color: var(--muted); font-size: 12px; }
.partner-slot img { display: block; width: min(150px, 72%); max-height: 64px; margin: 0 auto; object-fit: contain; filter: grayscale(1); opacity: .78; transition: filter .25s ease, opacity .25s ease; }
.partner-slot:hover img { filter: grayscale(0); opacity: 1; }
.partner-empty { grid-column: 1 / -1; padding: 44px 24px; border: 1px dashed var(--line); color: var(--muted); text-align: center; font-size: 14px; }

@media (max-width: 980px) {
  .site-header { grid-template-columns: 1fr auto; }
  .header-contact { display: none; }
  .menu-button { display: block; justify-self: end; }
  .main-nav {
    position: fixed;
    inset: 76px 0 auto;
    display: none;
    flex-direction: column;
    gap: 0;
    padding: 30px 36px;
    color: var(--ink);
    background: var(--paper);
    border-bottom: 1px solid var(--line);
  }
  .main-nav.is-open { display: flex; }
  .main-nav a { padding: 15px 0; border-bottom: 1px solid var(--line); }
  .main-nav a::after { display: none; }
  .page-hero { grid-template-columns: 1fr; }
  .page-hero-copy { min-height: 430px; padding: 90px 36px 60px; }
  .page-hero-media { min-height: 420px; margin: 0 36px 36px; }
  .page-tabs { overflow-x: auto; }
  .page-tabs a, .page-tabs span { flex: 0 0 220px; }
  .section-head, .about-lead { grid-template-columns: 1fr; }
  .family, .family:nth-child(even) { grid-template-columns: 1fr; }
  .family:nth-child(even) .family-image { order: initial; }
  .family-image img { max-height: 540px; }
  .case-grid { grid-template-columns: 1fr 1fr; }
  .feature-story { grid-template-columns: 1fr; }
  .feature-story-image { min-height: 420px; }
  .about-values { grid-template-columns: 1fr; }
  .value-card { border-right: 0; border-bottom: 1px solid var(--line); }
  .value-card:last-child { border-bottom: 0; }
  .scene-grid { grid-template-columns: repeat(2,1fr); }
  .scene-item:nth-child(2n) { border-right: 0; }
  .scene-item:nth-child(-n+6) { border-bottom: 1px solid var(--line); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-qr { display: none; }
  .about-collage { grid-template-columns: 1fr 1fr; }
  .about-collage figure:first-child { grid-column: 1 / -1; grid-row: auto; }
  .catalog-layout { grid-template-columns: 1fr; }
  .catalog-nav { position: static; display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line); }
  .catalog-nav-head { grid-column: 1 / -1; padding: 24px; }
  .catalog-nav a { padding: 18px; border-right: 1px solid var(--line); border-bottom: 0; }
  .category-grid, .simple-case-grid { grid-template-columns: repeat(2, 1fr); }
  .products-page .category-grid { grid-template-columns: 1fr; }
  .product-list-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .category-section { grid-template-columns: 1fr; }
  .category-section-media { grid-row: auto; }
  .category-section-media img { min-height: 260px; aspect-ratio: 1.9 / 1; }
  .product-slot-grid { grid-column: auto; }
  .compact-article { grid-template-columns: 220px minmax(0, 1fr); }
  .compact-article time { display: none; }
  .about-summary { grid-template-columns: 1fr; }
  .about-summary-visual { min-height: 520px; }
  .partner-head { display: block; }
  .partner-head > p { margin-top: 18px; }
  .partner-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 620px) {
  :root { --page: calc(100vw - 32px); --content-gutter: 16px; }
  .site-header { width: 100%; min-height: 66px; padding: 0 16px; }
  .brand-image-link { width: 142px; max-width: 58vw; height: 40px; }
  .brand-logo { height: 36px; }
  .main-nav { inset: 66px 0 auto; padding: 20px 16px; }
  .page-hero-copy { min-height: 360px; padding: 68px 16px 42px; }
  .page-hero h1 { font-size: clamp(52px,16vw,78px); }
  .page-hero-media { min-height: 330px; margin: 0 16px 16px; }
  .page-tabs { width: calc(100vw - 32px); }
  .page-tabs a, .page-tabs span { flex-basis: 172px; min-height: 62px; padding: 0 16px; }
  .section { padding: 76px 0; }
  .family { min-height: 0; }
  .family-copy { padding: 38px 24px 48px; }
  .case-grid { grid-template-columns: 1fr; }
  .article-row { grid-template-columns: 92px minmax(0,1fr); gap: 18px; }
  .article-row > span { display: none; }
  .article-row p { display: none; }
  .feature-story { min-height: 0; margin-bottom: 48px; }
  .feature-story-image { min-height: 280px; }
  .feature-story-copy { padding: 32px 24px 38px; }
  .about-collage { grid-template-columns: 1fr; margin-top: 48px; }
  .about-collage figure,
  .about-collage figure:first-child { min-height: 300px; grid-column: auto; }
  .simple-title { padding: 54px 0 42px; }
  .simple-title h1 { font-size: 38px; }
  .simple-title > p:last-child { margin-top: 18px; font-size: 13px; }
  .directory-section.tinted { padding-right: 16px; padding-left: 16px; }
  .catalog-nav { display: block; }
  .catalog-nav-head { padding: 0 0 22px; }
  .catalog-nav a { padding: 15px 4px; border-right: 0; border-bottom: 1px solid var(--line); }
  .category-grid, .simple-case-grid { grid-template-columns: 1fr; }
  .category-card { padding: 12px 12px 22px; }
  .category-card img { aspect-ratio: 1.18 / 1; }
  .category-section-head { padding: 28px 24px 20px; }
  .product-slot-grid { grid-template-columns: 1fr; }
  .product-slot { min-height: 130px; padding: 22px 24px; border-right: 0; }
  .compact-article { grid-template-columns: 110px minmax(0, 1fr); gap: 18px; padding: 26px 0; }
  .compact-article h2 { margin-bottom: 0; font-size: 18px; }
  .compact-article p, .compact-article .article-meta { display: none; }
  .about-summary-visual { min-height: 340px; }
  .about-facts { grid-template-columns: 1fr; }
  .about-fact { border-right: 0; border-bottom: 1px solid var(--line); }
  .about-fact:last-child { border-bottom: 0; }
  .partner-grid { grid-template-columns: 1fr 1fr; }
  .partner-slot { min-height: 120px; padding: 16px 10px; }
  .scene-item { min-height: 118px; padding: 18px; }
  .scene-item strong { font-size: 15px; }
  .product-toolbar {
    align-items: stretch;
    flex-direction: column;
    gap: 14px;
    margin-bottom: 24px;
  }
  .product-condition {
    min-height: 0;
    font-size: 14px;
  }
  .product-search {
    width: 100%;
  }
  .product-list-grid {
    grid-template-columns: 1fr;
    gap: 18px;
  }
  .product-list-card {
    padding: 12px 12px 24px;
  }
  .product-list-card h2 {
    margin-top: 18px;
    font-size: 16px;
  }
  .site-footer { padding: 58px 16px 18px; }
  .footer-grid { grid-template-columns: 1fr; gap: 40px; }
  .footer-bottom { display: block; }
  .footer-bottom span { display: block; }
  .footer-records { display: flex; justify-content: flex-start; margin-top: 8px; }
  .contact-dock { right: 12px; bottom: 12px; }
}

/* ==========================================================================
   Category Topic Banners & Topic Pillar Landing Pages
   ========================================================================== */
.category-topic-banner-wrap {
  margin-bottom: 28px;
}
.category-topic-banner-wrap[hidden] {
  display: none !important;
}
.category-topic-banner {
  display: none;
  position: relative;
  width: 100%;
  aspect-ratio: 2.35 / 1;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.08);
  text-decoration: none;
  background-color: #1a1a1a;
  transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.28s cubic-bezier(0.16, 1, 0.3, 1);
}
.category-topic-banner.is-active {
  display: block;
}
.category-topic-banner[hidden] {
  display: none !important;
}
.category-topic-banner:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.16);
}
.category-topic-banner-media {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.category-topic-banner-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}
.category-topic-banner:hover .category-topic-banner-media img {
  transform: scale(1.03);
}
.category-topic-banner-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(15, 15, 15, 0.1) 0%, rgba(15, 15, 15, 0.35) 100%);
}
.category-topic-banner-content {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 24px 32px;
  color: #fff;
  z-index: 1;
}
.category-topic-banner-tag {
  display: none !important;
}
.category-topic-banner-title {
  font-family: var(--display, "Noto Serif SC", "Songti SC", "SimSun", serif);
  font-size: clamp(26px, 3.6vw, 42px);
  font-weight: 700;
  color: #ffffff;
  margin: 0 0 10px 0;
  letter-spacing: 0.1em;
  text-shadow: 
    0 0 16px rgba(0, 0, 0, 0.75),
    0 2px 8px rgba(0, 0, 0, 0.9),
    0 0 32px rgba(60, 35, 15, 0.85),
    0 0 55px rgba(40, 20, 10, 0.75),
    0 0 80px rgba(20, 10, 5, 0.6);
  position: relative;
  z-index: 2;
}

[data-topic-banner="ice"] .category-topic-banner-title {
  text-shadow: 
    0 0 16px rgba(0, 0, 0, 0.75),
    0 2px 8px rgba(0, 0, 0, 0.9),
    0 0 32px rgba(60, 35, 15, 0.85),
    0 0 55px rgba(40, 20, 10, 0.75),
    0 0 80px rgba(20, 10, 5, 0.6);
}

[data-topic-banner="bake"] .category-topic-banner-title {
  text-shadow: 
    0 0 14px rgba(0, 0, 0, 0.7),
    0 2px 8px rgba(0, 0, 0, 0.9),
    0 0 30px rgba(45, 40, 30, 0.9),
    0 0 55px rgba(35, 28, 20, 0.8),
    0 0 80px rgba(20, 16, 12, 0.6);
}

[data-topic-banner="candy"] .category-topic-banner-title {
  text-shadow: 
    0 0 14px rgba(0, 0, 0, 0.7),
    0 2px 8px rgba(0, 0, 0, 0.9),
    0 0 30px rgba(25, 48, 72, 0.9),
    0 0 55px rgba(16, 35, 55, 0.8),
    0 0 80px rgba(10, 22, 38, 0.6);
}

/* 典雅国风细分割线 */
.category-topic-banner-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  max-width: 320px;
  margin: 0 auto 10px;
  color: rgba(255, 255, 255, 0.88);
}

.banner-divider-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.8));
}

.category-topic-banner-divider .banner-divider-line:last-child {
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.8), transparent);
}

.banner-divider-dot {
  width: 3.5px;
  height: 3.5px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 0 6px rgba(255, 255, 255, 0.7);
}

.banner-divider-mascot {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  min-width: 22px;
  max-width: 22px;
  filter: drop-shadow(0 1px 4px rgba(0, 0, 0, 0.6));
  flex-shrink: 0;
}

.banner-divider-mascot img,
.banner-mascot-icon {
  width: 22px !important;
  height: 22px !important;
  max-width: 22px !important;
  max-height: 22px !important;
  object-fit: contain !important;
  display: block !important;
}

.category-topic-banner-desc {
  font-size: clamp(13.5px, 1.45vw, 16px);
  font-weight: 500;
  color: rgba(255, 255, 255, 0.96);
  letter-spacing: 0.16em;
  margin: 0 0 18px 0;
  line-height: 1.5;
  text-shadow: 0 1px 6px rgba(0, 0, 0, 0.75), 0 0 14px rgba(0, 0, 0, 0.5);
}

.category-topic-banner-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 16px 8px 24px;
  background: linear-gradient(135deg, #ff6c38 0%, #ee4c2a 100%);
  color: #ffffff;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.04em;
  border-radius: 999px;
  box-shadow: 0 6px 20px rgba(238, 76, 42, 0.45), 0 0 0 1px rgba(255, 255, 255, 0.35) inset;
  transition: transform 0.25s ease, box-shadow 0.25s ease, filter 0.25s ease;
  text-decoration: none;
}

.category-topic-banner-btn .btn-divider {
  opacity: 0.55;
  font-size: 13px;
  font-weight: 300;
  margin: 0 1px;
}

.category-topic-banner-btn .btn-arrow-circle {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #ffffff;
  color: #ee4c2a;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
  transition: transform 0.25s ease;
  flex-shrink: 0;
}

.category-topic-banner-btn .btn-arrow-circle svg {
  width: 14px;
  height: 14px;
  transition: transform 0.25s ease;
}

.category-topic-banner:hover .category-topic-banner-btn {
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 8px 26px rgba(238, 76, 42, 0.55), 0 0 0 1px rgba(255, 255, 255, 0.5) inset;
  filter: brightness(1.04);
}

.category-topic-banner:hover .category-topic-banner-btn .btn-arrow-circle svg {
  transform: translateX(2px);
}

/* Topic Hub Pages Styling */
.topic-page .page-breadcrumbs {
  max-width: 1200px;
  margin: 20px auto 0;
  padding: 0 24px;
  font-size: 14px;
  color: #777;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.topic-page .page-breadcrumbs a {
  color: #555;
  text-decoration: none;
  transition: color 0.2s;
}
.topic-page .page-breadcrumbs a:hover {
  color: #ee4c2a;
}
.topic-page .page-breadcrumbs span {
  color: #aaa;
}
.topic-page .page-breadcrumbs .current {
  color: #222;
  font-weight: 500;
}

.topic-hero {
  position: relative;
  max-width: 1200px;
  margin: 16px auto 48px;
  padding: 0 24px;
}
.topic-hero-card {
  position: relative;
  width: 100%;
  aspect-ratio: 2.35 / 1;
  min-height: 280px;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  background-color: #1c1a19;
}
.topic-hero-media {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.topic-hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.topic-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(20, 18, 18, 0.85) 0%, rgba(20, 18, 18, 0.5) 50%, rgba(20, 18, 18, 0.8) 100%);
}
.topic-hero-content {
  position: relative;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(24px, 5vw, 48px);
  color: #fff;
  z-index: 1;
}
.topic-hero-tag {
  display: inline-block;
  align-self: flex-start;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1em;
  padding: 4px 14px;
  background: #ee4c2a;
  border-radius: 999px;
  margin-bottom: 14px;
}
.topic-hero-title {
  font-size: clamp(26px, 4vw, 42px);
  font-weight: 800;
  letter-spacing: 0.02em;
  margin: 0 0 14px 0;
  color: #ffffff;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
}
.topic-hero-desc {
  font-size: clamp(14px, 1.6vw, 17px);
  line-height: 1.6;
  max-width: 780px;
  color: rgba(255, 255, 255, 0.92);
  margin: 0 0 20px 0;
}
.topic-hero-badges {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.topic-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 8px;
  color: #ffffff;
}

.topic-section {
  max-width: 1200px;
  margin: 0 auto 60px;
  padding: 0 24px;
}
.topic-section-header {
  margin-bottom: 30px;
}
.topic-section-eyebrow {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #ee4c2a;
  margin-bottom: 6px;
}
.topic-section-title {
  font-size: clamp(22px, 2.5vw, 28px);
  font-weight: 700;
  color: #171716;
  margin: 0 0 8px 0;
}
.topic-section-desc {
  font-size: 15px;
  color: #666;
  margin: 0;
  line-height: 1.5;
}

.topic-product-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}
.topic-product-card {
  display: flex;
  flex-direction: column;
  background: #ffffff;
  border: 1px solid #e8e7e3;
  border-radius: 12px;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
}
.topic-product-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.08);
  border-color: #d1cfc7;
}
.topic-product-image {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  background: #f8f8f7;
  overflow: hidden;
}
.topic-product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.topic-product-card:hover .topic-product-image img {
  transform: scale(1.04);
}
.topic-product-body {
  padding: 18px 20px 22px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}
.topic-product-body h3 {
  font-size: 17px;
  font-weight: 600;
  color: #171716;
  margin: 0 0 8px 0;
}
.topic-product-body p {
  font-size: 13px;
  color: #777;
  line-height: 1.5;
  margin: 0 0 14px 0;
  flex-grow: 1;
}
.topic-product-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: #999;
  border-top: 1px dashed #eee;
  padding-top: 12px;
}
.topic-product-meta .moq {
  color: #ee4c2a;
  font-weight: 600;
}

.topic-case-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}
.topic-case-card {
  display: flex;
  flex-direction: column;
  background: #ffffff;
  border: 1px solid #e8e7e3;
  border-radius: 12px;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
}
.topic-case-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.08);
  border-color: #d1cfc7;
}
.topic-case-image {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  background: #f2f1ed;
  overflow: hidden;
}
.topic-case-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.topic-case-card:hover .topic-case-image img {
  transform: scale(1.04);
}
.topic-case-body {
  padding: 18px 20px 22px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}
.topic-case-body h3 {
  font-size: 17px;
  font-weight: 600;
  color: #171716;
  margin: 0 0 8px 0;
}
.topic-case-body p {
  font-size: 13px;
  color: #666;
  line-height: 1.5;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.topic-enc-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}
.topic-enc-card {
  display: flex;
  background: #ffffff;
  border: 1px solid #e8e7e3;
  border-radius: 12px;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
}
.topic-enc-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.06);
  border-color: #ee4c2a;
}
.topic-enc-image {
  width: 180px;
  min-width: 180px;
  background: #f8f8f7;
  overflow: hidden;
}
.topic-enc-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.topic-enc-body {
  padding: 20px 22px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  flex-grow: 1;
}
.topic-enc-body h3 {
  font-size: 16px;
  font-weight: 600;
  color: #171716;
  margin: 0 0 8px 0;
  transition: color 0.2s;
}
.topic-enc-card:hover .topic-enc-body h3 {
  color: #ee4c2a;
}
.topic-enc-body p {
  font-size: 13px;
  color: #666;
  line-height: 1.5;
  margin: 0 0 10px 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.topic-enc-body .read-more {
  font-size: 13px;
  font-weight: 600;
  color: #ee4c2a;
}

.topic-cta-box {
  background: linear-gradient(135deg, #2b2827 0%, #171514 100%);
  border-radius: 16px;
  padding: 44px 48px;
  color: #ffffff;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 32px;
  flex-wrap: wrap;
}
.topic-cta-text h3 {
  font-size: clamp(20px, 2.5vw, 26px);
  font-weight: 700;
  margin: 0 0 10px 0;
}
.topic-cta-text p {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.85);
  margin: 0 0 20px 0;
  max-width: 580px;
}
.topic-cta-contacts {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  font-size: 15px;
}
.topic-cta-contact-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #ffffff;
}
.topic-cta-contact-item strong {
  color: #ee4c2a;
}
.topic-cta-qr {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  background: rgba(255, 255, 255, 0.1);
  padding: 16px;
  border-radius: 12px;
  backdrop-filter: blur(6px);
}
.topic-cta-qr img {
  width: 110px;
  height: 110px;
  border-radius: 6px;
  background: #fff;
  padding: 4px;
  margin-bottom: 8px;
}
.topic-cta-qr span {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.8);
}

/* Topic Specs Matrix (4项核心定制参数决策矩阵) */
.topic-specs-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}
.topic-spec-card {
  background: #ffffff;
  border: 1px solid #e8e7e3;
  border-radius: 12px;
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
  position: relative;
  overflow: hidden;
}
.topic-spec-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, #ee4c2a 0%, #ff8a65 100%);
  opacity: 0.85;
}
.topic-spec-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
  border-color: #ee4c2a;
}
.topic-spec-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}
.topic-spec-icon {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  background: rgba(238, 76, 42, 0.1);
  color: #ee4c2a;
  flex-shrink: 0;
}
.topic-spec-icon svg {
  width: 16px;
  height: 16px;
}
.topic-spec-label {
  font-size: 13px;
  color: #777;
  font-weight: 600;
  letter-spacing: 0.05em;
}
.topic-spec-value {
  font-size: 18px;
  font-weight: 700;
  color: #171716;
  margin: 0 0 8px 0;
  line-height: 1.3;
}
.topic-spec-desc {
  font-size: 13px;
  color: #666;
  line-height: 1.5;
  margin: 0;
}

/* Topic FAQ Accordion (专栏专属高频 Q&A 折叠栏) */
.topic-faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.topic-faq-item {
  background: #ffffff;
  border: 1px solid #e8e7e3;
  border-radius: 12px;
  overflow: hidden;
  transition: border-color 0.25s, box-shadow 0.25s;
}
.topic-faq-item[open] {
  border-color: #ee4c2a;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.05);
}
.topic-faq-question {
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 600;
  color: #171716;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  user-select: none;
  list-style: none;
  transition: color 0.2s;
}
.topic-faq-question::-webkit-details-marker {
  display: none;
}
.topic-faq-question:hover {
  color: #ee4c2a;
}
.topic-faq-icon {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: #f4f3ef;
  color: #888;
  flex-shrink: 0;
  transition: transform 0.25s ease, background-color 0.25s, color 0.25s;
}
.topic-faq-icon svg {
  width: 14px;
  height: 14px;
  transition: transform 0.25s;
}
.topic-faq-item[open] .topic-faq-icon {
  background: #ee4c2a;
  color: #ffffff;
  transform: rotate(180deg);
}
.topic-faq-answer {
  padding: 0 24px 22px;
  font-size: 14px;
  color: #555;
  line-height: 1.7;
  border-top: 1px dashed #f0eeea;
  margin-top: -4px;
  padding-top: 16px;
}
.topic-faq-answer p {
  margin: 0;
}

@media (max-width: 992px) {
  .topic-specs-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .topic-product-grid, .topic-case-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .topic-enc-grid {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 768px) {
  .topic-specs-grid {
    grid-template-columns: 1fr;
  }
  .topic-spec-card {
    padding: 18px 16px;
  }
  .topic-faq-question {
    padding: 16px 18px;
    font-size: 15px;
  }
  .topic-faq-answer {
    padding: 0 18px 18px;
    padding-top: 14px;
  }
  .category-topic-banner {
    aspect-ratio: auto;
    min-height: 150px;
  }
  .category-topic-banner-content {
    padding: 16px;
  }
  .category-topic-banner-desc {
    display: none;
  }
  .topic-hero-card {
    aspect-ratio: auto;
    min-height: 240px;
  }
  .topic-hero-content {
    padding: 28px 20px;
  }
  .topic-hero-desc {
    font-size: 14px;
  }
  .topic-product-grid, .topic-case-grid {
    grid-template-columns: 1fr;
  }
  .topic-enc-card {
    flex-direction: column;
  }
  .topic-enc-image {
    width: 100%;
    min-width: 0;
    height: 180px;
  }
  .topic-cta-box {
    padding: 30px 24px;
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}