/**
 * 浙江银证特种胶带：门头钴蓝 + 白字标识的工业 B2B 官网皮肤。
 * 页面底使用微冷白与水平细线肌理，呼应厂房外墙压型板节奏；避免霓虹渐变与模板化卡片墙。
 */

:root {
  --rt-ink: #071326;
  --rt-ink-muted: #3d4d66;
  --rt-ink-soft: #5a6b82;
  --rt-paper: #f4f7fc;
  --rt-paper-2: #e9f0fa;
  --rt-surface: #fbfcff;
  --rt-brand: #1450c8;
  --rt-brand-deep: #0c3488;
  --rt-line: rgba(7, 19, 38, 0.1);
  --rt-shadow: 0 18px 48px rgba(8, 32, 88, 0.1);
  --rt-radius-lg: 12px;
  --rt-radius-md: 8px;
  --rt-radius-pill: 999px;
  --rt-font-sans: 'Noto Sans SC', 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
  --rt-font-display: 'Noto Serif SC', 'Noto Sans SC', 'PingFang SC', serif;
  --rt-max: 1200px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--rt-font-sans);
  color: var(--rt-ink);
  background-color: var(--rt-paper);
  background-image: radial-gradient(1000px 520px at 12% -8%, rgba(20, 80, 200, 0.07), transparent 58%),
    repeating-linear-gradient(180deg, transparent 0, transparent 5px, rgba(20, 80, 200, 0.035) 5px, rgba(20, 80, 200, 0.035) 6px),
    linear-gradient(180deg, var(--rt-paper) 0%, var(--rt-paper-2) 100%);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
}

.container {
  width: min(100% - 40px, var(--rt-max));
  margin-inline: auto;
}

/* —— 顶栏：品牌钴蓝底 + 白字 —— */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: linear-gradient(180deg, color-mix(in srgb, var(--rt-brand-deep) 94%, #000) 0%, var(--rt-brand-deep) 100%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow: 0 8px 28px rgba(4, 20, 60, 0.22);
}

.site-header__shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px 0;
  position: relative;
}

.brand-mark {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.brand {
  font-family: var(--rt-font-display);
  font-weight: 700;
  font-size: clamp(1rem, 2.2vw, 1.2rem);
  letter-spacing: 0.04em;
  color: #f2f6ff;
}

.brand-sub {
  font-size: 0.72rem;
  letter-spacing: 0.28em;
  color: rgba(242, 246, 255, 0.72);
  font-weight: 600;
  text-transform: none;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  justify-content: flex-end;
}

.nav a {
  font-size: 0.88rem;
  font-weight: 600;
  color: rgba(242, 246, 255, 0.82);
  text-decoration: none;
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.nav a:hover {
  color: #fff;
  border-bottom-color: rgba(255, 255, 255, 0.45);
}

.site-nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  border: none;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.12);
  cursor: pointer;
  flex-shrink: 0;
}

.site-nav-toggle:focus-visible {
  outline: 2px solid var(--rt-brand);
  outline-offset: 2px;
}

.site-nav-toggle__bar {
  display: block;
  width: 20px;
  height: 2px;
  margin: 0 auto;
  background: #f2f6ff;
  border-radius: 1px;
}

@media (max-width: 768px) {
  .site-nav-toggle {
    display: inline-flex;
  }

  .nav.nav--collapsible {
    display: none;
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    flex-wrap: nowrap;
    gap: 4px;
    padding: 12px 14px 14px;
    margin: 0;
    background: rgba(255, 255, 255, 0.98);
    border: 1px solid var(--rt-line);
    border-radius: var(--rt-radius-md);
    box-shadow: var(--rt-shadow);
    z-index: 80;
    justify-content: flex-start;
    max-height: min(72vh, 420px);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }

  .nav.nav--collapsible.is-open {
    display: flex;
  }

  .nav.nav--collapsible a {
    padding: 10px 12px;
    border-radius: 10px;
    border-bottom: 2px solid transparent;
  }

  .nav.nav--collapsible a:hover {
    background: rgba(20, 80, 200, 0.1);
    border-bottom-color: transparent;
  }

  body.site-nav-open {
    overflow: hidden;
  }
}

@media (min-width: 769px) {
  .site-nav-toggle {
    display: none !important;
  }

  .nav.nav--collapsible {
    display: flex !important;
  }
}

/* —— Hero —— */
.hero {
  position: relative;
  margin-top: 28px;
  border-radius: var(--rt-radius-lg);
  overflow: hidden;
  min-height: clamp(320px, 52vh, 520px);
  box-shadow: var(--rt-shadow);
}

.hero > img {
  width: 100%;
  height: 100%;
  min-height: clamp(320px, 52vh, 520px);
  object-fit: cover;
  filter: saturate(1.05) contrast(1.02);
}

.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(6, 18, 32, 0.72) 0%, rgba(6, 18, 32, 0.38) 48%, rgba(6, 18, 32, 0.55) 100%);
  pointer-events: none;
}

.hero-content {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: clamp(24px, 5vw, 48px);
  max-width: min(640px, 92%);
}

.hero-eyebrow {
  display: inline-flex;
  align-self: flex-start;
  padding: 6px 14px;
  border-radius: var(--rt-radius-pill);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: rgba(255, 255, 255, 0.95);
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.22);
  margin: 0 0 14px;
}

.hero h1 {
  font-family: var(--rt-font-display);
  font-weight: 700;
  font-size: clamp(1.55rem, 3.6vw, 2.35rem);
  line-height: 1.28;
  color: #fff;
  margin: 0 0 14px;
  text-shadow: 0 2px 24px rgba(0, 0, 0, 0.25);
}

.hero-content > p:not(.hero-eyebrow) {
  margin: 0 0 22px;
  color: rgba(255, 255, 255, 0.92);
  font-size: clamp(0.92rem, 1.6vw, 1.05rem);
  max-width: 52ch;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  cursor: pointer;
  font-family: inherit;
  font-weight: 700;
  font-size: 0.92rem;
  border-radius: var(--rt-radius-pill);
  padding: 12px 28px;
  border: 1px solid transparent;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: #fff;
  color: var(--rt-brand-deep);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.18);
}

.btn-primary:hover {
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.22);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.45);
  backdrop-filter: blur(6px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.16);
}

.btn-ghost {
  background: transparent;
  color: var(--rt-brand);
  border-color: rgba(20, 80, 200, 0.35);
}

/* —— 区块卡片 —— */
.card {
  margin-top: 28px;
  padding: clamp(32px, 5vw, 48px);
  background: var(--rt-surface);
  border: none;
  border-radius: var(--rt-radius-lg);
  box-shadow: 0 4px 40px rgba(0, 0, 0, 0.03);
}

.section-head {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 10px;
}

.section-kicker {
  align-self: flex-start;
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.22em;
  color: var(--rt-brand);
  background: rgba(20, 80, 200, 0.08);
  padding: 5px 12px;
  border-radius: var(--rt-radius-pill);
}

.title {
  font-family: var(--rt-font-display);
  font-size: clamp(1.25rem, 2.4vw, 1.55rem);
  font-weight: 700;
  margin: 0;
  color: var(--rt-ink);
}

.lede {
  margin: 10px 0 0;
  font-size: 0.98rem;
}

.muted {
  color: var(--rt-ink-muted);
  font-size: 0.92rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 18px;
}

.feature {
  padding: 18px 18px 20px;
  border-radius: var(--rt-radius-md);
  border: 1px solid var(--rt-line);
  background: linear-gradient(180deg, #fff, #faf8f5);
}

.feature__title {
  font-size: 1.02rem;
  margin: 0 0 8px;
  color: var(--rt-brand-deep);
}

/* —— 产品筛选与网格 —— */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 18px 0 14px;
}

.filter {
  cursor: pointer;
  font-family: inherit;
  font-weight: 700;
  font-size: 0.82rem;
  padding: 8px 16px;
  border-radius: var(--rt-radius-pill);
  border: 1px solid var(--rt-line);
  background: #fff;
  color: var(--rt-ink-muted);
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.filter.active {
  background: var(--rt-brand);
  color: #fff;
  border-color: var(--rt-brand);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 18px;
}

.product-tile {
  cursor: pointer;
  border-radius: var(--rt-radius-md);
  overflow: hidden;
  border: 1px solid var(--rt-line);
  background: color-mix(in srgb, var(--rt-surface) 96%, var(--rt-brand) 4%);
  transition: border-color 0.22s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.22s cubic-bezier(0.22, 1, 0.36, 1);
}

.product-tile:hover {
  box-shadow: 0 14px 36px rgba(8, 32, 88, 0.1);
  border-color: color-mix(in srgb, var(--rt-brand) 35%, var(--rt-line));
}

.product-tile img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  background: #0b1220;
}

.tile-body {
  padding: 16px 18px 18px;
}

.tile-body h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
  color: var(--rt-ink);
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.tag {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--rt-radius-pill);
  background: rgba(20, 80, 200, 0.1);
  color: var(--rt-brand);
}

/* —— 应用领域 —— */
.apps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin-top: 16px;
}

.apps-item {
  padding: 16px 18px;
  border-radius: var(--rt-radius-md);
  border: 1px solid var(--rt-line);
  background: #fff;
}

.apps-item h3 {
  margin: 0 0 8px;
  font-size: 1rem;
  color: var(--rt-brand-deep);
}

/* —— 证书 —— */
.certs .grid > div {
  text-align: center;
}

.cert-image {
  width: 100%;
  height: 160px;
  object-fit: cover;
  border-radius: var(--rt-radius-md);
  border: 1px solid var(--rt-line);
  cursor: zoom-in;
  transition: box-shadow 0.2s ease;
}

.cert-image:hover {
  box-shadow: var(--rt-shadow);
}

/* —— 联系 —— */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.form input,
.form textarea {
  font-family: inherit;
  font-size: 0.92rem;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--rt-line);
  background: #fdfcfa;
}

.form textarea {
  min-height: 120px;
  resize: vertical;
}

/* —— 流程 —— */
.flow-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin-top: 16px;
}

.flow-item {
  padding: 18px;
  border-radius: var(--rt-radius-md);
  border: 1px solid var(--rt-line);
  background: linear-gradient(180deg, #fff, #f8fafc);
}

.flow-step {
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  color: var(--rt-brand);
  margin-bottom: 8px;
}

.flow-item h3 {
  margin: 0 0 8px;
  font-size: 1rem;
}

/* —— 页脚 —— */
.footer {
  margin: 40px 0 56px;
  text-align: center;
  font-size: 0.82rem;
  color: var(--rt-ink-soft);
}

/* —— 悬浮 —— */
.floating-contact {
  position: fixed;
  right: 18px;
  bottom: 22px;
  z-index: 60;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.floating-contact button {
  cursor: pointer;
  font-family: inherit;
  font-weight: 700;
  font-size: 0.78rem;
  padding: 10px 14px;
  border-radius: 12px;
  border: 1px solid var(--rt-line);
  background: rgba(255, 255, 255, 0.92);
  color: var(--rt-brand-deep);
  box-shadow: var(--rt-shadow);
  backdrop-filter: blur(10px);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.floating-contact button:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 40px rgba(8, 24, 42, 0.12);
}

/* —— 弹层 —— */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(8, 18, 32, 0.55);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 80;
  padding: 24px;
}

.modal.show {
  display: flex;
}

.modal img {
  max-width: min(920px, 96vw);
  max-height: 86vh;
  border-radius: var(--rt-radius-lg);
  box-shadow: var(--rt-shadow);
}

.detail-modal-content {
  background: #fff;
  border-radius: var(--rt-radius-lg);
  padding: 22px 24px;
  max-width: 520px;
  width: 100%;
  max-height: 86vh;
  overflow: auto;
  border: 1px solid var(--rt-line);
}

.spec-table {
  margin-top: 12px;
  border: 1px solid var(--rt-line);
  border-radius: 12px;
  overflow: hidden;
}

.spec-row {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 12px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--rt-line);
  font-size: 0.88rem;
}

.spec-row:last-child {
  border-bottom: 0;
}

.spec-key {
  color: var(--rt-ink-soft);
  font-weight: 600;
}

/* —— Toast —— */
.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%) translateY(120%);
  z-index: 90;
  padding: 12px 20px;
  border-radius: var(--rt-radius-pill);
  background: var(--rt-ink);
  color: #fff;
  font-size: 0.88rem;
  font-weight: 600;
  opacity: 0;
  transition: opacity 0.25s ease, transform 0.25s ease;
  pointer-events: none;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.toast.error {
  background: #7c2d12;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .btn,
  .filter,
  .product-tile,
  .floating-contact button {
    transition: none;
  }
}

/**
 * 全站壳层：解除窄版 page-shell，与钴蓝顶栏、冷白内容区对齐。
 */
.page-shell {
  width: 100%;
  max-width: none;
  margin: 0;
  min-height: 100vh;
  background: transparent;
}

body {
  background-color: var(--rt-paper);
  background-image: radial-gradient(1000px 520px at 12% -8%, rgba(20, 80, 200, 0.07), transparent 58%),
    repeating-linear-gradient(180deg, transparent 0, transparent 5px, rgba(20, 80, 200, 0.035) 5px, rgba(20, 80, 200, 0.035) 6px),
    linear-gradient(180deg, var(--rt-paper) 0%, var(--rt-paper-2) 100%);
}

.brand-mark {
  flex-direction: row;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
  min-width: 0;
}

.brand-mark__text {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.brand-mark__logo {
  width: 44px;
  height: 44px;
  object-fit: contain;
  flex-shrink: 0;
}

/**
 * 顶栏内品牌字必须为浅色系（与深色导航底对比）。
 * 下方 `.brand-mark .brand` 仅用于非顶栏场景，勿覆盖顶栏可读性。
 */
.site-header .brand-mark .brand {
  color: #f2f6ff;
}

.site-header .brand-sub {
  color: rgba(242, 246, 255, 0.72);
}

.surface-muted {
  background: #f8f9fa;
  padding: clamp(32px, 4vw, 56px) 0;
  margin-top: 0;
}

.main-stack {
  padding-bottom: 72px;
}

.site-footer {
  border-top: 1px solid var(--rt-line);
  padding: 24px 0 40px;
  margin-top: 8px;
  text-align: center;
  font-size: 0.82rem;
  color: var(--rt-ink-soft);
  background: #fff;
}

.filters a.filter {
  text-decoration: none;
}

.filter.is-active {
  background: var(--rt-brand);
  color: #fff;
  border-color: var(--rt-brand);
}

.hero .btn-row a.btn {
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.grid a.product-tile {
  text-decoration: none;
  color: inherit;
}

.floating-contact a.floating-contact__link {
  cursor: pointer;
  font-family: inherit;
  font-weight: 700;
  font-size: 0.78rem;
  padding: 10px 14px;
  border-radius: 12px;
  border: 1px solid var(--rt-line);
  background: rgba(255, 255, 255, 0.92);
  color: var(--rt-brand-deep);
  box-shadow: var(--rt-shadow);
  backdrop-filter: blur(10px);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  text-decoration: none;
  text-align: center;
}

.floating-contact a.floating-contact__link:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 40px rgba(8, 24, 42, 0.12);
}

.site-footer__extra {
  margin: 0 0 8px;
  font-size: 0.88rem;
}

.site-footer__extra a {
  color: var(--rt-brand);
  font-weight: 600;
  text-decoration: none;
}

.site-footer__extra a:hover {
  text-decoration: underline;
}

.site-footer__sep {
  margin: 0 8px;
  color: var(--rt-ink-soft);
}

@media (max-width: 899px) {
  .rt-tabbar {
    display: flex;
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    transform: none;
    width: 100%;
    max-width: none;
    z-index: 55;
    margin: 0;
    padding: 8px 10px calc(8px + env(safe-area-inset-bottom, 0px));
    gap: 6px;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(14px);
    border-top: 1px solid var(--rt-line);
    box-shadow: 0 -10px 28px rgba(8, 24, 42, 0.07);
    justify-content: space-around;
  }

  .rt-tabbar__item {
    flex: 1;
    max-width: 20%;
    border-radius: 10px;
    font-size: 0.68rem;
    font-weight: 700;
    padding: 8px 2px;
    color: var(--rt-ink-muted);
    background: transparent;
    border: 1px solid transparent;
    text-decoration: none;
    text-align: center;
    line-height: 1.25;
  }

  .rt-tabbar__item--active {
    background: rgba(20, 80, 200, 0.12);
    color: var(--rt-brand);
    border-color: rgba(20, 80, 200, 0.22);
  }

  .rt-page-product {
    padding-bottom: calc(76px + env(safe-area-inset-bottom, 0px));
  }

  body:has(.rt-tabbar) .floating-contact {
    bottom: calc(56px + env(safe-area-inset-bottom, 0px));
  }
}

@media (min-width: 900px) {
  .rt-tabbar {
    display: none !important;
  }
}

.rt-wrap--stack {
  padding-top: 20px;
  padding-bottom: 48px;
}

.rt-content--premium {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--rt-ink-muted);
}

.rt-content--premium p {
  margin: 0 0 14px;
}

.rt-pager--premium {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin: 28px 0 12px;
}

.rt-search--premium {
  margin-top: 20px;
}

.rt-product-hero {
  display: grid;
  gap: 20px;
  grid-template-columns: 1fr;
  margin-bottom: 24px;
}

@media (min-width: 768px) {
  .rt-product-hero {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    align-items: start;
  }
}

.rt-product-hero .rt-cover {
  width: 100%;
  max-height: 360px;
  object-fit: cover;
  border-radius: var(--rt-radius-md);
  border: 1px solid var(--rt-line);
}

.rt-product-hero__meta .rt-detail-hero__title {
  margin: 0 0 10px;
  font-size: clamp(1.35rem, 2.5vw, 1.75rem);
  color: var(--rt-ink);
}

.rt-product-hero__meta .rt-detail-hero__desc,
.rt-product-hero__meta .rt-detail-hero__spec {
  margin: 0 0 8px;
  color: var(--rt-ink-soft);
  font-size: 0.92rem;
}

.rt-detail-wrap--premium .rt-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 24px 0 8px;
}

.rt-detail-wrap--premium .rt-actions .btn {
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.rt-about-body {
  padding-bottom: 48px;
}

/**
 * 公司简介页：研发 / 质量控制章节导航与卡片版式。
 */
.yz-about-toc {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0 22px;
}

.yz-about-toc__link {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border-radius: var(--rt-radius-pill);
  font-size: 0.84rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--rt-brand);
  border: 1px solid color-mix(in srgb, var(--rt-brand) 28%, var(--rt-line));
  background: #fff;
  transition: background 0.18s ease, border-color 0.18s ease;
}

.yz-about-toc__link:hover {
  background: color-mix(in srgb, var(--rt-brand) 8%, #fff);
  border-color: var(--rt-brand);
}

.yz-about-dual {
  display: grid;
  gap: 14px;
  margin: 12px 0 8px;
}

@media (min-width: 800px) {
  .yz-about-dual {
    grid-template-columns: 1fr 1fr;
    align-items: stretch;
  }
}

.yz-about-card {
  border-radius: var(--rt-radius-md);
  border: 1px solid var(--rt-line);
  padding: 16px 18px;
  background: var(--rt-surface);
  box-shadow: 0 6px 20px rgba(8, 24, 42, 0.04);
}

.yz-about-card__title {
  margin: 0 0 10px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--rt-ink);
}

.yz-about-card ul {
  margin: 0;
  padding-left: 1.15rem;
  color: var(--rt-ink-muted);
  font-size: 0.94rem;
  line-height: 1.7;
}

.yz-about-card li + li {
  margin-top: 6px;
}

.yz-about-grid-4 {
  display: grid;
  gap: 12px;
  margin: 12px 0 8px;
}

@media (min-width: 640px) {
  .yz-about-grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1000px) {
  .yz-about-grid-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.yz-about-tile {
  border-radius: var(--rt-radius-md);
  border: 1px solid var(--rt-line);
  padding: 14px 16px;
  background: #fff;
  min-height: 100%;
}

.yz-about-tile__title {
  margin: 0 0 8px;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--rt-ink);
}

.yz-about-tile p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.65;
  color: var(--rt-ink-muted);
}

.yz-geo-dl {
  margin: 12px 0 0;
  padding: 0;
  border-radius: var(--rt-radius-md);
  border: 1px solid var(--rt-line);
  background: #fff;
}

.yz-geo-dl dt {
  margin: 0;
  padding: 12px 14px 4px;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--rt-ink);
}

.yz-geo-dl dd {
  margin: 0;
  padding: 0 14px 12px;
  font-size: 0.86rem;
  line-height: 1.65;
  color: var(--rt-ink-muted);
  border-bottom: 1px solid var(--rt-line);
}

.yz-geo-dl dd:last-of-type {
  border-bottom: none;
}

#yz-about-tech,
#yz-about-rd,
#yz-about-quality,
#yz-about-geo-intent {
  scroll-margin-top: 88px;
}

/**
 * 内页全局统一：与首页同一套圆角、阴影、品牌色与桌面字号（覆盖 runtong.css 中基于 rpx 的缩放）。
 */
.rt-wrap,
.rt-wrap--stack {
  padding: clamp(16px, 2.5vw, 28px) 0 40px;
  min-height: auto;
}

.rt-detail-wrap {
  padding: clamp(16px, 2.5vw, 24px) 0 48px;
  min-height: auto;
  gap: 18px;
}

.rt-detail-wrap--premium {
  padding-bottom: 32px;
}

.rt-breadcrumb {
  font-size: 0.82rem;
  color: var(--rt-ink-soft);
  margin: 0 0 18px;
  line-height: 1.5;
}

.rt-breadcrumb__label {
  font-weight: 600;
  color: var(--rt-ink-muted);
}

.rt-breadcrumb a {
  color: var(--rt-brand);
  text-decoration: none;
  font-weight: 600;
}

.rt-breadcrumb a:hover {
  text-decoration: underline;
}

.rt-block-hero,
.rt-block-hero--slate,
.rt-block-hero--cert {
  border-radius: var(--rt-radius-lg);
  padding: clamp(20px, 3vw, 28px);
  box-shadow: var(--rt-shadow);
  background: linear-gradient(120deg, var(--rt-brand-deep) 0%, var(--rt-brand) 52%, #143d66 100%);
  margin-bottom: 8px;
}

.rt-block-hero__title {
  font-size: clamp(1.2rem, 2.4vw, 1.55rem);
  font-weight: 700;
}

.rt-block-hero__desc {
  font-size: 0.95rem;
  line-height: 1.65;
  max-width: 56ch;
}

.rt-detail-card {
  border-radius: var(--rt-radius-md);
  border: 1px solid var(--rt-line);
  box-shadow: 0 8px 28px rgba(8, 24, 42, 0.05);
  padding: clamp(18px, 2.2vw, 24px);
  background: var(--rt-surface);
}

.rt-detail-card__title,
.rt-contact-card__title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--rt-ink);
}

.rt-detail-card__text,
.rt-contact-card__text {
  font-size: 0.95rem;
  color: var(--rt-ink-muted);
  line-height: 1.75;
}

.rt-contact-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: 1fr;
}

@media (min-width: 880px) {
  .rt-contact-grid {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
}

/**
 * 联系页：左侧为 CMS 富文本（内层 p/ul），需覆盖 yinzheng.css 中基于 --rpx 的段落字号，
 * 否则在桌面宽屏下会异常放大，与右侧「企业信息」不一致。
 */
.rt-contact-grid .rt-detail-card .rt-contact-card__text {
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--rt-ink-muted);
}

.rt-contact-grid .rt-detail-card .rt-contact-card__text p,
.rt-contact-grid .rt-detail-card .rt-contact-card__text li {
  font-size: inherit;
  line-height: inherit;
  color: inherit;
}

.rt-contact-grid .rt-detail-card .rt-contact-card__text p {
  margin: 0 0 12px;
}

.rt-contact-grid .rt-detail-card .rt-contact-card__text p:last-child {
  margin-bottom: 0;
}

.rt-contact-grid .rt-detail-card .rt-contact-card__text ul,
.rt-contact-grid .rt-detail-card .rt-contact-card__text ol {
  margin: 0 0 12px;
  padding-left: 1.2rem;
  font-size: inherit;
}

.rt-news-card {
  border-radius: var(--rt-radius-md);
  border: 1px solid var(--rt-line);
  box-shadow: 0 8px 24px rgba(8, 24, 42, 0.04);
  padding: 18px 20px;
  text-decoration: none;
  color: inherit;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

a.rt-news-card:hover {
  box-shadow: var(--rt-shadow);
  transform: translateY(-2px);
}

.rt-news-card__category {
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  color: var(--rt-brand);
}

.rt-news-card__category::before {
  content: none;
}

.rt-news-card__title {
  font-size: 1.05rem;
  color: var(--rt-ink);
}

.rt-news-card__desc {
  font-size: 0.92rem;
  color: var(--rt-ink-muted);
}

.rt-news-card__date,
.rt-news-card__more {
  font-size: 0.82rem;
}

.rt-tabs {
  gap: 10px;
  margin: 18px 0 14px;
}

.rt-tabs__item {
  border-radius: var(--rt-radius-pill);
  padding: 9px 18px;
  font-size: 0.84rem;
  font-weight: 700;
  border: 1px solid var(--rt-line);
  background: #fff;
  color: var(--rt-ink-muted);
}

.rt-tabs__item--active {
  background: var(--rt-brand);
  border-color: var(--rt-brand);
  color: #fff;
}

.rt-tab-panels {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.rt-list {
  gap: 14px;
}

.rt-pager .rt-pager__btn,
.rt-pager--premium .rt-pager__btn {
  border-radius: var(--rt-radius-pill);
  padding: 8px 14px;
  font-size: 0.82rem;
  font-weight: 600;
  border: 1px solid var(--rt-line);
  color: var(--rt-brand);
  background: #fff;
  text-decoration: none;
}

.rt-pager .rt-pager__btn:hover {
  border-color: var(--rt-brand);
  background: rgba(20, 80, 200, 0.06);
}

.rt-pager .page-numbar a,
.rt-pager .page-numbar span {
  border-radius: var(--rt-radius-pill);
  min-width: 2.25rem;
  padding: 8px 12px;
  font-size: 0.82rem;
  border: 1px solid var(--rt-line);
  color: var(--rt-brand);
  background: #fff;
}

.rt-pager .page-numbar span.page-current,
.rt-pager .page-numbar .active {
  background: var(--rt-brand);
  color: #fff;
  border-color: var(--rt-brand);
}

.rt-search__input {
  min-height: 44px;
  border-radius: 12px;
  border: 1px solid var(--rt-line);
  font-size: 0.95rem;
  padding: 0 14px;
}

.rt-search__btn {
  border-radius: var(--rt-radius-pill);
  background: var(--rt-brand);
  color: #fff;
  font-weight: 700;
  font-size: 0.88rem;
  border: none;
  padding: 0 22px;
  cursor: pointer;
}

.rt-search__btn:hover {
  filter: brightness(1.05);
}

.rt-article-card {
  padding: clamp(22px, 3vw, 32px);
}

.rt-article-card__title {
  text-align: left;
  margin: 0 0 10px;
  font-size: clamp(1.25rem, 2.4vw, 1.55rem);
}

.rt-article-card__meta {
  margin: 0 0 20px;
  font-size: 0.88rem;
}

.rt-article-card__body img {
  max-width: 100%;
  height: auto;
  border-radius: var(--rt-radius-md);
}

.rt-apps-grid {
  margin-top: 8px;
}

.rt-app-tile {
  min-height: 140px;
}

.rt-app-tile .tile-body {
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}

.rt-app-tile__tag {
  margin: 0;
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  color: var(--rt-brand);
}

.rt-app-tile__cta {
  margin-top: auto;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--rt-brand);
}

.rt-msg-form label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--rt-ink-muted);
}

.rt-msg-form input,
.rt-msg-form textarea {
  font-family: inherit;
}

.rt-page-prolist .section-head .title {
  margin: 0;
}

/**
 * 产品详情：技术参数表（横向滚动）与多图图集。
 */
.yz-pro-intro {
  margin-bottom: 16px;
}

.yz-pro-intro p {
  margin: 0 0 12px;
}

.yz-table-scroll {
  margin: 12px 0 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: var(--rt-radius-md);
  border: 1px solid var(--rt-line);
  background: #fff;
}

.rt-spec-table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  font-size: 0.86rem;
  color: var(--rt-ink-muted);
}

.rt-spec-table th,
.rt-spec-table td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--rt-line);
  vertical-align: top;
}

.rt-spec-table thead th {
  background: color-mix(in srgb, var(--rt-brand) 8%, var(--rt-surface));
  color: var(--rt-ink);
  font-weight: 700;
  white-space: nowrap;
}

.rt-spec-table tbody th[scope='row'] {
  font-weight: 600;
  color: var(--rt-ink);
  white-space: nowrap;
  background: color-mix(in srgb, var(--rt-paper) 55%, #fff);
}

.rt-spec-table tbody tr:last-child th,
.rt-spec-table tbody tr:last-child td {
  border-bottom: none;
}

.yz-spec-footnote {
  margin: 10px 0 0;
  font-size: 0.82rem;
  color: var(--rt-ink-soft);
}

.rt-product-gallery__hint {
  margin: 0 0 12px;
  font-size: 0.86rem;
}

.rt-product-gallery__strip {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  padding-bottom: 6px;
  scroll-snap-type: x proximity;
}

.rt-product-gallery__item {
  flex: 0 0 auto;
  width: min(240px, 72vw);
  scroll-snap-align: start;
  border-radius: var(--rt-radius-md);
  border: 1px solid var(--rt-line);
  overflow: hidden;
  background: #fff;
  text-decoration: none;
  color: inherit;
  box-shadow: 0 6px 18px rgba(8, 24, 42, 0.06);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.rt-product-gallery__item:hover {
  box-shadow: 0 10px 26px rgba(8, 24, 42, 0.1);
  transform: translateY(-2px);
}

.rt-product-gallery__item img {
  display: block;
  width: 100%;
  height: 140px;
  object-fit: cover;
}

.rt-product-gallery__cap {
  display: block;
  padding: 8px 10px 10px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--rt-ink-muted);
  line-height: 1.35;
}