/* 品牌合作：默认单行业；浅色 Logo 底板；可靠翻牌（不用易穿帮的 3D backface） */
.ymh-partners {
  --yp-ink: #10151c;
  --yp-muted: rgba(16, 21, 28, .58);
  --yp-line: rgba(16, 21, 28, .12);
  --yp-signal: #c8192e;
  --yp-plate: #f7f5f1;
  display: grid;
  gap: 18px;
}

.ymh-partners__head { max-width: 720px; }

.ymh-partners__kicker {
  margin: 0 0 10px;
  color: var(--yp-muted);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.ymh-partners__head h2 {
  margin: 0;
  color: var(--yp-ink);
  font-size: clamp(26px, 3.6vw, 38px);
  line-height: 1.15;
  letter-spacing: -.02em;
}

.ymh-partners__head p {
  margin: 10px 0 0;
  color: var(--yp-muted);
  font-size: 14px;
  line-height: 1.7;
}

.ymh-partners__filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.ymh-partners__filters button {
  min-height: 34px;
  padding: 0 14px;
  border: 1px solid var(--yp-line);
  border-radius: 999px;
  background: transparent;
  color: var(--yp-muted);
  font: 650 13px/1 inherit;
  cursor: pointer;
  transition: .2s ease;
}

.ymh-partners__filters button:hover,
.ymh-partners__filters button.is-active {
  color: #fff;
  border-color: var(--yp-signal);
  background: var(--yp-signal);
  box-shadow: 0 10px 22px rgba(200, 25, 46, .22);
}

.ymh-partners__grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 12px;
}

.ymh-partners__flip {
  appearance: none;
  -webkit-appearance: none;
  border: 0;
  padding: 0;
  margin: 0;
  background: transparent;
  cursor: pointer;
  height: 92px;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity .35s ease, transform .35s ease;
  transition-delay: calc(var(--delay, 0) * 28ms);
}

.ymh-partners__flip.is-in {
  opacity: 1;
  transform: translateY(0);
}

.ymh-partners__flip[hidden] { display: none !important; }

.ymh-partners__flip-inner {
  position: relative;
  display: grid;
  width: 100%;
  height: 100%;
  border-radius: 16px;
}

.ymh-partners__face {
  grid-area: 1 / 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px;
  border-radius: 16px;
  transition: opacity .35s ease, transform .35s cubic-bezier(.2, .8, .2, 1);
}

.ymh-partners__face--front {
  z-index: 2;
  opacity: 1;
  transform: rotateY(0deg);
  border: 1px solid rgba(16, 21, 28, .06);
  background: transparent;
}

.ymh-partners__logo-plate {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  padding: 12px 14px;
  border-radius: 14px;
  background: var(--yp-plate);
  box-shadow: 0 8px 20px rgba(16, 21, 28, .05);
  transition: transform .25s ease, box-shadow .25s ease;
}

.ymh-partners__flip:hover .ymh-partners__logo-plate {
  transform: translateY(-2px);
  box-shadow: 0 14px 30px rgba(16, 21, 28, .1);
}

.ymh-partners__logo-plate img {
  display: block !important;
  width: auto !important;
  height: auto !important;
  max-width: 100% !important;
  max-height: 44px !important;
  object-fit: contain !important;
  object-position: center;
  opacity: 1 !important;
  visibility: visible !important;
  filter: none;
}

.ymh-partners__face--back {
  z-index: 1;
  flex-direction: column;
  gap: 6px;
  opacity: 0;
  transform: rotateY(-95deg);
  pointer-events: none;
  background: linear-gradient(145deg, #1c1016, #121820);
  border: 1px solid rgba(255, 255, 255, .1);
  color: #fff7f2;
}

.ymh-partners__face--back b {
  font-size: 14px;
  font-weight: 700;
}

.ymh-partners__flip.is-flipped .ymh-partners__face--front {
  opacity: 0;
  transform: rotateY(95deg);
  pointer-events: none;
  z-index: 1;
}

.ymh-partners__flip.is-flipped .ymh-partners__face--back {
  opacity: 1;
  transform: rotateY(0deg);
  pointer-events: auto;
  z-index: 2;
}

.ymh-partners__flip.is-flipped:hover .ymh-partners__logo-plate {
  transform: none;
}

/* 首页深色区块 */
.ymh-partners--home {
  --yp-ink: #fff7f2;
  --yp-muted: rgba(255, 244, 238, .62);
  --yp-line: rgba(255, 255, 255, .16);
  --yp-plate: #ffffff;
}

.ymh-partners--home .ymh-partners__face--front {
  border-color: transparent;
}

@media (max-width: 1100px) {
  .ymh-partners__grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (max-width: 720px) {
  .ymh-partners__grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
  .ymh-partners__flip { height: 78px; }
  .ymh-partners__logo-plate { padding: 10px; border-radius: 12px; }
  .ymh-partners__logo-plate img { max-height: 36px !important; }
  .ymh-partners__filters {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }
  .ymh-partners__filters::-webkit-scrollbar { display: none; }
  .ymh-partners__filters button { flex: 0 0 auto; }
}

@media (max-width: 420px) {
  .ymh-partners__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (hover: none) {
  .ymh-partners__flip:hover .ymh-partners__logo-plate { transform: none; }
}

@media (prefers-reduced-motion: reduce) {
  .ymh-partners__face,
  .ymh-partners__flip { transition: none; }
}