:root {
  --ref-shadow-soft: 0 18px 42px rgba(7, 20, 34, 0.12);
  --ref-shadow-card: 0 12px 28px rgba(18, 43, 69, 0.08);
  --ref-shadow-hover: 0 18px 40px rgba(31, 92, 158, 0.14);
  --ref-border-subtle: rgba(255, 255, 255, 0.12);
  --ref-panel-dark: rgba(255, 255, 255, 0.06);
}

body {
  background:
    radial-gradient(circle at top, rgba(31, 92, 158, 0.06), transparent 24%),
    #f4f6f9;
  overflow-x: clip;
}

html {
  overflow-x: clip;
}

img,
video {
  max-width: 100%;
}

.media-img,
.media-video,
.media-card img,
.media-card video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-card.light img,
.photo-box.has-img img,
.product-tile img,
.detail-tile img {
  object-fit: contain;
}

.yiyi-nav,
.site-nav {
  backdrop-filter: saturate(140%) blur(10px);
}

.nav-logo-circle,
.nlc,
.brand-mark {
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.05);
}

.nav-brand,
.nbrand,
.brand-copy strong {
  text-shadow: 0 1px 0 rgba(0, 0, 0, 0.15);
}

.btn-primary,
.btn-p,
.btn-str,
.btn-fc-q,
.btn-nav-quote,
.btn-nq,
.btn-gold,
.btn-blue,
.btn-g,
.btn-b,
.btn-green,
.btn-green-lg,
.foot-btn-p,
.fbp {
  box-shadow: 0 12px 24px rgba(31, 92, 158, 0.18);
}

.btn-primary:hover,
.btn-p:hover,
.btn-str:hover,
.btn-fc-q:hover,
.btn-nav-quote:hover,
.btn-nq:hover,
.btn-gold:hover,
.btn-blue:hover,
.btn-g:hover,
.btn-b:hover,
.btn-green:hover,
.btn-green-lg:hover,
.foot-btn-p:hover,
.fbp:hover {
  transform: translateY(-1px);
}

.btn-outline-dark,
.btn-o,
.btn-outline,
.btn-ghost,
.btn-str-o,
.foot-btn-o,
.fbo {
  backdrop-filter: blur(6px);
}

.btn-primary,
.btn-p,
.btn-gold,
.btn-blue,
.btn-g,
.btn-b,
.btn-green,
.btn-green-lg,
.btn-nav-quote,
.foot-btn-p,
.btn-outline,
.btn-outline-dark,
.btn-ghost,
.btn-o,
.foot-btn-o {
  border-radius: 10px !important;
}

.page-hero,
.prod-hero,
.section-hero {
  position: relative;
  overflow: hidden;
}

.page-hero::before,
.prod-hero::before,
.section-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 80% 18%, rgba(74, 140, 200, 0.18), transparent 28%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.03), transparent 42%);
  pointer-events: none;
}

.page-hero-inner,
.ph-inner,
.hero-inner {
  position: relative;
  z-index: 1;
}

.hero-contact-cards .hcc,
.ph-stat,
.hero-panel,
.wa-chat,
.cm-card,
.contact-form,
.selector-wrap,
.faq-wrap,
.faq-card,
.cs-card,
.case-card,
.res-card,
.blog-card,
.post-card,
.article-card,
.feat-card,
.str-card,
.content-card,
.download-card,
.path-card,
.proof-card,
.country-card,
.faq-item {
  box-shadow: var(--ref-shadow-card);
}

.hero-contact-cards .hcc:hover,
.cm-card:hover,
.cs-card:hover,
.case-card:hover,
.res-card:hover,
.blog-card:hover,
.post-card:hover,
.article-card:hover,
.feat-card:hover,
.str-card:hover,
.content-card:hover,
.download-card:hover,
.path-card:hover,
.proof-card:hover,
.country-card:hover {
  box-shadow: var(--ref-shadow-hover);
}

.hcc,
.cm-card,
.contact-form,
.selector-wrap,
.faq-wrap,
.faq-card,
.cs-card,
.case-card,
.res-card,
.blog-card,
.post-card,
.article-card,
.content-card,
.feat-card,
.str-card,
.download-card,
.path-card,
.proof-card,
.country-card {
  border-color: rgba(31, 92, 158, 0.1);
}

.wa-chat {
  border: 1px solid rgba(18, 43, 69, 0.08);
}

.wa-head,
.wa-btn {
  box-shadow: 0 12px 24px rgba(37, 211, 102, 0.18);
}

.sticky-cta,
.cc-btn,
.cm-action,
.sr-contact,
.eeat-link,
.il-card,
.foot-btn-p,
.foot-btn-o {
  transition: transform 0.18s ease, box-shadow 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.sticky-cta:hover,
.cc-btn:hover,
.cm-action:hover,
.sr-contact:hover,
.eeat-link:hover,
.il-card:hover,
.foot-btn-p:hover,
.foot-btn-o:hover {
  transform: translateY(-1px);
}

.il-card,
.cm-card,
.contact-form,
.selector-wrap {
  border-radius: 18px !important;
}

.foot-btn-p,
.foot-btn-o {
  min-height: 42px;
  display: flex !important;
  align-items: center;
  justify-content: center;
}

.foot-grid,
.fg {
  gap: 36px !important;
}

.cm-card,
.contact-form,
.selector-wrap {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(247, 250, 253, 0.98));
}

.contact-form,
.selector-wrap {
  border: 1px solid rgba(31, 92, 158, 0.1) !important;
}

.cf-input,
.cf-select,
.cf-textarea,
input[type="text"],
input[type="email"],
input[type="tel"],
select,
textarea {
  border-radius: 10px !important;
  transition: border-color 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.cf-input:focus,
.cf-select:focus,
.cf-textarea:focus,
input[type="text"]:focus,
input[type="email"]:focus,
input[type="tel"]:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: rgba(31, 92, 158, 0.45) !important;
  box-shadow: 0 0 0 4px rgba(31, 92, 158, 0.08);
}

.sel-btn,
.faq-q,
.faq-trigger,
.qa-step,
.log-card,
.process-step {
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.sel-btn:hover,
.faq-q:hover,
.faq-trigger:hover,
.qa-step:hover,
.log-card:hover,
.process-step:hover {
  transform: translateY(-1px);
}

.faq-q,
.faq-trigger {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(247, 250, 253, 0.98));
}

.cta-row a[href*="contact.html"],
.cta-row a[href*="engineering-oem.html"],
.cta-row a[href*="replacement-review.html"],
.cta-row a[href*="belt-matching.html"] {
  box-shadow: 0 10px 24px rgba(18, 43, 69, 0.12);
}

.yiyi-footer,
.footer {
  position: relative;
  overflow: hidden;
}

.yiyi-footer::before,
.footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top right, rgba(74, 140, 200, 0.12), transparent 24%);
  pointer-events: none;
}

.foot-grid,
.fg,
.foot-bottom,
.fbot {
  position: relative;
  z-index: 1;
}

.foot-link,
.flink,
.foot-contact-a,
.fca {
  transition: color 0.18s ease, transform 0.18s ease;
}

.foot-link:hover,
.flink:hover,
.foot-contact-a:hover,
.fca:hover {
  transform: translateX(2px);
}

@media (max-width: 767px) {
  .wa-wrap {
    right: 16px;
    bottom: 16px;
  }

  .wa-chat {
    width: min(320px, calc(100vw - 32px));
  }

  .foot-grid,
  .fg {
    gap: 24px !important;
  }
}

/* Shared navigation compatibility layer for product pages using the newer mega-menu markup. */
.tb-inner {
  max-width: 1280px;
  height: 36px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.tb-left,
.tb-badges,
.tb-langs {
  display: flex;
  align-items: center;
  gap: 14px;
}

.tb-a,
.tb-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: rgba(255, 255, 255, 0.55);
  font-size: 12px;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
}

.tb-a:hover {
  color: rgba(255, 255, 255, 0.85);
}

.tb-sep {
  width: 1px;
  height: 14px;
  background: rgba(255, 255, 255, 0.15);
  flex: 0 0 auto;
}

.tb-dot {
  width: 5px;
  height: 5px;
  border-radius: 999px;
  background: #4A8CC8;
}

.tb-lang {
  border: 0;
  border-radius: 3px;
  padding: 4px 6px;
  background: transparent;
  color: rgba(255, 255, 255, 0.55);
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
}

.tb-lang.active {
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
}

.nav-inner {
  max-width: 1280px;
  height: 72px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.nav-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex: 0 0 auto;
}

.nav-brand {
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.nav-desktop {
  display: none;
  align-items: center;
  gap: 2px;
}

@media (min-width: 1180px) {
  .nav-desktop {
    display: flex;
  }
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 14px;
  flex: 0 0 auto;
}

.nd {
  position: relative;
}

.nd-btn,
.nav-link-simple {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 11px;
  color: rgba(255, 255, 255, 0.76);
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  border-radius: 6px;
  transition: color 0.18s ease, background 0.18s ease;
}

.nd-btn:hover,
.nav-link-simple:hover,
.nd:focus-within > .nd-btn {
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
}

.gold-btn {
  color: #C8922A;
}

.nd-chev {
  opacity: 0.65;
  flex: 0 0 auto;
}

.drop-panel {
  position: absolute;
  top: calc(100% + 16px);
  left: 0;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity 0.16s ease, transform 0.16s ease, visibility 0.16s ease;
}

.nd:hover > .drop-panel,
.nd:focus-within > .drop-panel {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
}

.drop-box {
  min-width: 240px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.10);
  border-radius: 0 0 12px 12px;
  background: #0D1B2A;
  box-shadow: 0 26px 70px rgba(0, 0, 0, 0.42);
}

.drop-gold-bar,
.drop-blue-bar {
  height: 3px;
  background: #C8922A;
}

.drop-blue-bar {
  background: #4A8CC8;
}

.drop-body {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.core-dl,
.dl {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 38px;
  padding: 9px 12px;
  color: rgba(255, 255, 255, 0.70);
  text-decoration: none;
  border-radius: 6px;
}

.core-dl:hover,
.dl:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.07);
}

.cdl-icon,
.dl-icon {
  width: 18px;
  text-align: center;
  flex: 0 0 auto;
}

.cdl-name,
.dl-label {
  font-size: 14px;
  font-weight: 600;
}

.cdl-sub {
  margin-left: 2px;
  color: rgba(255, 255, 255, 0.42);
  font-size: 12px;
}

.cdl-badge,
.dl-badge {
  color: #C8922A;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.mega-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(190px, 1fr));
  gap: 12px;
  min-width: 900px;
  padding: 18px;
}

.mega-head {
  margin: 0 0 8px;
  color: #4A8CC8;
  font-family: var(--fm, monospace);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.two-col {
  display: grid;
  grid-template-columns: repeat(2, minmax(210px, 1fr));
  gap: 14px;
  min-width: 520px;
  padding: 18px;
}

.eeat-card {
  display: block;
  margin-top: 12px;
  padding: 12px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.05);
  color: rgba(255, 255, 255, 0.76);
  text-decoration: none;
}

.eeat-k {
  color: #C8922A;
  font-family: var(--fm, monospace);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.eeat-title {
  display: block;
  margin-top: 6px;
  font-weight: 700;
}

.eeat-desc {
  display: block;
  margin-top: 4px;
  color: rgba(255, 255, 255, 0.45);
  font-size: 12px;
  line-height: 1.5;
}

.btn-nav-quote {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 8px;
  background: #2F66A6;
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

.mob-toggle {
  display: inline-flex;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.mob-toggle span {
  width: 26px;
  height: 2px;
  background: rgba(255, 255, 255, 0.72);
}

.mob-menu {
  display: none;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  background: #0D1B2A;
}

.mob-menu.open {
  display: block;
}

.mob-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 18px 2rem 24px;
}

.mob-link,
.mob-sub {
  display: block;
  padding: 11px 0;
  color: rgba(255, 255, 255, 0.78);
  text-decoration: none;
  font-weight: 600;
}

.mob-group {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.mob-group-title {
  margin: 8px 0;
  color: #C8922A;
  font-family: var(--fm, monospace);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.mob-sub {
  padding-left: 12px;
  color: rgba(255, 255, 255, 0.62);
  font-size: 14px;
}

@media (min-width: 1501px) {
  .mob-toggle {
    display: none;
  }
}

@media (max-width: 1500px) {
  .nav-desktop {
    display: none !important;
  }

  .mob-toggle {
    display: flex;
  }

  .nav-inner {
    padding: 0 1rem;
  }

  .btn-nav-quote {
    min-height: 40px;
    padding: 0 14px;
  }
}

@media (max-width: 900px) {
  .tb-inner {
    padding: 0 1rem;
  }

  .tb-badges,
  .tb-langs,
  .tb-sep {
    display: none;
  }
}

@media (max-width: 767px) {
  .btn-nav-quote {
    display: none !important;
  }
}

/* P1 trust evidence modules */
.trust-evidence-grid,
.video-proof-grid,
.download-center-grid,
.privacy-proof-grid {
  display: grid;
  gap: 18px;
}

.trust-evidence-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.video-proof-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.video-proof-grid.single {
  grid-template-columns: minmax(0, 1fr);
  max-width: 1060px;
}

.video-proof-grid.single .video-proof-card {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.65fr);
  align-items: stretch;
}

.video-proof-grid.single .video-proof-media {
  min-height: 360px;
}

.download-center-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.privacy-proof-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.trust-evidence-card,
.video-proof-card,
.download-center-card,
.privacy-proof-card {
  background: #fff;
  border: 1px solid rgba(31, 92, 158, 0.12);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: var(--ref-shadow-card);
}

.trust-evidence-card.dark,
.video-proof-card.dark,
.privacy-proof-card.dark {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.12);
}

.trust-evidence-media,
.video-proof-media {
  position: relative;
  aspect-ratio: 16 / 9;
  background: #dfe7f0;
  overflow: hidden;
}

.trust-evidence-media img,
.trust-evidence-media video,
.video-proof-media img,
.video-proof-media video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.trust-evidence-media::after,
.video-proof-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7, 15, 24, 0.02), rgba(7, 15, 24, 0.48));
  pointer-events: none;
}

.trust-evidence-badge,
.video-proof-badge,
.download-center-badge,
.privacy-proof-badge {
  display: inline-flex;
  width: fit-content;
  align-items: center;
  gap: 6px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #c8922a;
  background: rgba(200, 146, 42, 0.12);
  border: 1px solid rgba(200, 146, 42, 0.22);
  border-radius: 999px;
  padding: 5px 10px;
  margin-bottom: 12px;
}

.trust-evidence-body,
.video-proof-body,
.download-center-body,
.privacy-proof-body {
  padding: 20px;
}

.trust-evidence-body h3,
.video-proof-body h3,
.download-center-body h3,
.privacy-proof-body h3 {
  font-size: 18px;
  line-height: 1.25;
  color: #172235;
  margin: 0 0 10px;
}

.trust-evidence-card.dark h3,
.video-proof-card.dark h3,
.privacy-proof-card.dark h3 {
  color: #fff;
}

.trust-evidence-body p,
.video-proof-body p,
.download-center-body p,
.privacy-proof-body p {
  font-size: 14px;
  line-height: 1.7;
  color: #536173;
  margin: 0;
}

.trust-evidence-card.dark p,
.video-proof-card.dark p,
.privacy-proof-card.dark p {
  color: rgba(255, 255, 255, 0.68);
}

.trust-evidence-list,
.download-center-list,
.privacy-proof-list {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.trust-evidence-list li,
.download-center-list li,
.privacy-proof-list li {
  position: relative;
  padding-left: 18px;
  font-size: 13px;
  line-height: 1.55;
  color: #536173;
}

.trust-evidence-list li::before,
.download-center-list li::before,
.privacy-proof-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #4a8cc8;
}

.trust-evidence-card.dark li,
.privacy-proof-card.dark li {
  color: rgba(255, 255, 255, 0.68);
}

.proof-panorama {
  position: relative;
  overflow: hidden;
  border-radius: 18px;
  min-height: 380px;
  background: #0f1f35;
  border: 1px solid rgba(31, 92, 158, 0.12);
  box-shadow: var(--ref-shadow-soft);
}

.proof-panorama img,
.proof-panorama video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.proof-panorama::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(7, 18, 32, 0.86), rgba(7, 18, 32, 0.28));
}

.proof-panorama-content {
  position: relative;
  z-index: 1;
  max-width: 560px;
  padding: 42px;
  color: #fff;
}

.proof-panorama-content h2 {
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.08;
  margin: 0 0 16px;
}

.proof-panorama-content p {
  color: rgba(255, 255, 255, 0.72);
  line-height: 1.75;
  margin: 0;
}

.download-center-card {
  position: relative;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(246, 249, 252, 0.98)),
    repeating-linear-gradient(90deg, rgba(31, 92, 158, 0.04) 0 1px, transparent 1px 48px);
  border: 1px solid rgba(31, 92, 158, 0.22);
  border-radius: 8px;
  box-shadow: 0 18px 42px rgba(19, 43, 72, 0.12);
}

.download-center-card::before {
  content: attr(data-doc);
  display: flex;
  align-items: center;
  height: 38px;
  padding: 0 20px;
  background: linear-gradient(90deg, #10243d, #1f5c9e);
  border-bottom: 3px solid #c8922a;
  color: rgba(255, 255, 255, 0.9);
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
}

.download-center-card::after {
  content: "PDF";
  position: absolute;
  top: 48px;
  right: 18px;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  background: #eef4f9;
  border: 1px solid rgba(31, 92, 158, 0.22);
  color: #1f5c9e;
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.download-center-card .download-center-body {
  display: flex;
  min-height: 100%;
  flex-direction: column;
  padding: 24px 22px 22px;
}

.download-center-card .download-center-badge {
  border-radius: 2px;
  background: rgba(200, 146, 42, 0.10);
  border-color: rgba(200, 146, 42, 0.32);
  color: #9a6814;
}

.download-center-card .download-center-body h3 {
  max-width: calc(100% - 54px);
  font-size: 21px;
  line-height: 1.16;
  margin-bottom: 12px;
}

.download-center-card .download-center-body p {
  font-size: 15px;
  line-height: 1.65;
  color: #3e4d60;
}

.download-center-card .download-center-list {
  padding-top: 12px;
  margin-top: 16px;
  border-top: 1px solid rgba(31, 92, 158, 0.14);
}

.download-center-card .download-center-list li {
  font-size: 13.5px;
  color: #43546a;
}

.download-center-card .download-center-list li::before {
  top: 0.62em;
  width: 6px;
  height: 6px;
  background: #c8922a;
  border-radius: 0;
  transform: rotate(45deg);
}

.download-center-type {
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #1f5c9e;
  margin-top: auto;
  padding-top: 20px;
}

.download-center-type::before {
  content: "";
  width: 28px;
  height: 2px;
  background: #c8922a;
}

.download-center-action {
  margin-top: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 16px;
  border-radius: 4px;
  background: #1f5c9e;
  color: #fff;
  text-decoration: none;
  font-size: 13px;
  font-weight: 800;
  box-shadow: 0 10px 22px rgba(31, 92, 158, 0.22);
}

.download-center-action.secondary {
  margin-top: 10px;
  background: #fff;
  color: #1f5c9e;
  border: 1px solid rgba(31, 92, 158, 0.26);
  box-shadow: none;
}

#trust-evidence,
#factory-panorama-proof,
#manufacturing-video-proof,
#quality-proof-downloads,
#download-center,
#privacy-safe-case-proof,
#quality-documents,
#product-asset-system,
#raw-material-testing-library,
#quality-asset-proof,
#catalog-curation-system {
  scroll-margin-top: 118px;
}

.asset-proof-section {
  background: #f4f8fb;
  border-top: 1px solid rgba(31, 92, 158, 0.08);
  border-bottom: 1px solid rgba(31, 92, 158, 0.08);
  padding: 78px 0;
}

.asset-proof-section.dark {
  background: #0f2438;
  color: #eef4f9;
  border-color: rgba(255, 255, 255, 0.08);
}

.asset-proof-inner {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.asset-proof-head {
  max-width: 780px;
  margin-bottom: 32px;
}

.asset-proof-kicker {
  font-family: var(--font-mono, ui-monospace, SFMono-Regular, Menlo, monospace);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: #1f5c9e;
  margin-bottom: 10px;
}

.asset-proof-section.dark .asset-proof-kicker {
  color: #8dbce8;
}

.asset-proof-head h2 {
  margin: 0 0 12px;
  color: #122b45;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.08;
  letter-spacing: 0;
}

.asset-proof-section.dark .asset-proof-head h2 {
  color: #fff;
}

.asset-proof-head p {
  margin: 0;
  color: #5f6f7f;
  font-size: 15px;
  line-height: 1.75;
}

.asset-proof-section.dark .asset-proof-head p {
  color: #c7d6e5;
}

.asset-proof-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.asset-proof-card {
  background: #fff;
  border: 1px solid rgba(31, 92, 158, 0.1);
  border-radius: 8px;
  padding: 22px;
  box-shadow: 0 16px 34px rgba(13, 27, 46, 0.05);
}

.asset-proof-section.dark .asset-proof-card {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.12);
  box-shadow: none;
}

.asset-proof-number {
  display: block;
  color: #1f5c9e;
  font-size: 26px;
  font-weight: 800;
  line-height: 1;
  margin-bottom: 8px;
}

.asset-proof-section.dark .asset-proof-number {
  color: #8dbce8;
}

.asset-proof-card strong {
  display: block;
  color: #122b45;
  font-size: 15px;
  line-height: 1.35;
  margin-bottom: 8px;
}

.asset-proof-section.dark .asset-proof-card strong {
  color: #fff;
}

.asset-proof-card p {
  margin: 0;
  color: #667789;
  font-size: 13px;
  line-height: 1.65;
}

.asset-proof-section.dark .asset-proof-card p {
  color: #c7d6e5;
}

.asset-proof-rules {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.asset-proof-rule {
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.74);
  border: 1px solid rgba(31, 92, 158, 0.1);
  padding: 16px;
  color: #334b63;
  font-size: 13px;
  line-height: 1.6;
}

.asset-proof-rule b {
  display: block;
  color: #122b45;
  margin-bottom: 4px;
}

.asset-proof-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.asset-proof-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 18px;
  border-radius: 4px;
  background: #1f5c9e;
  color: #fff;
  text-decoration: none;
  font-size: 13px;
  font-weight: 800;
}

.asset-proof-link.secondary {
  background: #fff;
  color: #1f5c9e;
  border: 1px solid rgba(31, 92, 158, 0.18);
}

@media (max-width: 1100px) {
  .download-center-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .trust-evidence-grid,
  .video-proof-grid,
  .privacy-proof-grid,
  .asset-proof-grid,
  .asset-proof-rules {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .tb-left {
    display: none !important;
  }

  .two-col,
  .two-col.center,
  .two-col.center.rev {
    grid-template-columns: 1fr !important;
    width: 100% !important;
    max-width: 100% !important;
    min-width: 0 !important;
  }

  .two-col > *,
  .rm-photo,
  .rm-photo-lg,
  .rm-photo-md,
  .rm-photo-sm {
    min-width: 0 !important;
    max-width: 100% !important;
  }

  .replacement-steps-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    gap: 22px 10px !important;
  }

  .replacement-steps-grid > div:first-child {
    display: none !important;
  }

  .download-center-grid,
  .trust-evidence-grid,
  .video-proof-grid,
  .privacy-proof-grid,
  .asset-proof-grid,
  .asset-proof-rules {
    grid-template-columns: 1fr;
  }

  .video-proof-grid.single .video-proof-card {
    grid-template-columns: 1fr;
  }

  .video-proof-grid.single .video-proof-media {
    min-height: 0;
  }

  .proof-panorama {
    min-height: 460px;
  }

  .proof-panorama::after {
    background: linear-gradient(180deg, rgba(7, 18, 32, 0.28), rgba(7, 18, 32, 0.88));
  }

  .proof-panorama-content {
    padding: 28px;
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
  }
}

@media (max-width: 520px) {
  .nav-right {
    gap: 8px !important;
  }

  .mob-toggle {
    width: 38px !important;
  }
}

@media (max-width: 390px) {
  .btn-nav-quote {
    max-width: 132px;
  }
}

/* Release footer guardrails: keep brand, contact icons, and inquiry CTAs stable across all legacy pages. */
.yiyi-footer,
.footer,
footer.yiyi-footer {
  background: #0d1b2e !important;
  color: #fff !important;
}

.yiyi-footer .foot-grid,
.footer .foot-grid,
footer.yiyi-footer .foot-grid {
  align-items: start;
}

.yiyi-footer .foot-logo-row,
.footer .foot-logo-row,
footer.yiyi-footer .foot-logo-row {
  display: flex !important;
  flex-direction: column !important;
  align-items: flex-start !important;
  gap: 10px !important;
}

.yiyi-footer .foot-logo-img,
.footer .foot-logo-img,
footer.yiyi-footer .foot-logo-img {
  display: block !important;
  width: auto !important;
  height: 36px !important;
  max-width: 180px !important;
  max-height: 36px !important;
  object-fit: contain !important;
  filter: brightness(0) invert(1) !important;
  margin: 0 0 2px !important;
  flex: 0 0 auto !important;
}

.yiyi-footer .foot-brand,
.footer .foot-brand,
footer.yiyi-footer .foot-brand {
  color: #fff !important;
  font-size: 15px !important;
  line-height: 1.25 !important;
  letter-spacing: .08em !important;
}

.yiyi-footer .foot-about,
.yiyi-footer .foot-info-item,
.yiyi-footer .foot-copy,
.footer .foot-about,
.footer .foot-info-item,
.footer .foot-copy {
  color: rgba(255, 255, 255, .72) !important;
}

.yiyi-footer .foot-col-head,
.footer .foot-col-head {
  color: #fff !important;
}

.yiyi-footer .foot-link,
.yiyi-footer .foot-contact-a,
.footer .foot-link,
.footer .foot-contact-a {
  color: #9ab2ca !important;
  text-decoration: none !important;
}

.yiyi-footer .foot-link:hover,
.yiyi-footer .foot-contact-a:hover,
.footer .foot-link:hover,
.footer .foot-contact-a:hover {
  color: #fff !important;
}

.yiyi-footer .foot-link.gold,
.footer .foot-link.gold {
  color: #d4a24a !important;
}

.yiyi-footer .fi-icon,
.yiyi-footer .fca-icon,
.footer .fi-icon,
.footer .fca-icon {
  width: 14px !important;
  height: 14px !important;
  max-width: 14px !important;
  max-height: 14px !important;
  flex: 0 0 14px !important;
}

.yiyi-footer .foot-contact-a svg,
.footer .foot-contact-a svg {
  width: 14px !important;
  height: 14px !important;
  max-width: 14px !important;
  max-height: 14px !important;
}

.yiyi-footer .footer-inquiry-panel,
.footer .footer-inquiry-panel,
footer .footer-inquiry-panel {
  display: none !important;
}

.yiyi-footer .foot-info-item span.fi-icon,
.footer .foot-info-item span.fi-icon {
  width: 8px !important;
  height: 8px !important;
  max-width: 8px !important;
  max-height: 8px !important;
  flex: 0 0 8px !important;
  border-radius: 999px !important;
  background: #4A8CC8 !important;
  color: transparent !important;
  font-size: 0 !important;
  line-height: 0 !important;
  overflow: hidden !important;
}

.tb-langs .tb-lang,
.tblangs .tblang {
  display: none !important;
}

.tb-langs .tb-lang[onclick*="'en'"],
.tb-langs .tb-lang[onclick*="'de'"],
.tb-langs .tb-lang[onclick*="'es'"],
.tb-langs .tb-lang[onclick*="'pt'"],
.tblangs .tblang[onclick*="'en'"],
.tblangs .tblang[onclick*="'de'"],
.tblangs .tblang[onclick*="'es'"],
.tblangs .tblang[onclick*="'pt'"] {
  display: inline-flex !important;
}

@media (max-width: 767px) {
  .yiyi-footer,
  .footer,
  footer.yiyi-footer {
    padding-top: 40px !important;
  }

  .yiyi-footer .foot-logo-img,
  .footer .foot-logo-img,
  footer.yiyi-footer .foot-logo-img {
    height: 32px !important;
    max-height: 32px !important;
    max-width: 160px !important;
  }
}