.page-contact {
  --contact-gutter: clamp(1.25rem, 4vw, 2.5rem);
  --door-cut: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
  background:
    radial-gradient(circle at 12% 10%, rgba(123, 47, 247, .16), transparent 32%),
    radial-gradient(circle at 88% 6%, rgba(0, 212, 255, .12), transparent 30%),
    var(--dark-void);
  color: #e9e6df;
}

.page-contact .contact-shell {
  width: min(1120px, calc(100% - 2.5rem));
  margin-inline: auto;
}

/* ===== Hero ===== */
.page-contact .contact-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(1.5rem, 4vw, 3rem) 0 0;
  background:
    radial-gradient(circle at 86% 18%, rgba(0, 212, 255, .14), transparent 34%),
    radial-gradient(circle at 10% 28%, rgba(123, 47, 247, .18), transparent 30%),
    linear-gradient(155deg, #171a23 0%, #1b1f2b 58%, #272635 100%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 54px), 0 100%);
}

.page-contact .contact-hero__terrain {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: .5;
  pointer-events: none;
}

.page-contact .breadcrumb {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .55rem;
  margin: 0 0 2.25rem;
  font-size: .875rem;
  color: #8c91a0;
}

.page-contact .breadcrumb a {
  color: var(--desert-gold);
  text-decoration: none;
  font-weight: 500;
}

.page-contact .breadcrumb a:hover {
  color: var(--electric-blue);
}

.page-contact .contact-hero__crumb-sep {
  opacity: .45;
}

.page-contact .contact-hero__body {
  position: relative;
  z-index: 1;
  max-width: 900px;
  margin-inline: 0;
}

.page-contact .contact-hero__kicker {
  display: flex;
  align-items: center;
  gap: .6rem;
  margin: 0 0 1rem;
  font-family: var(--font-num);
  font-size: .85rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--live-amber);
}

.page-contact .contact-hero__kicker::before {
  content: "";
  width: 34px;
  height: 3px;
  background: linear-gradient(90deg, var(--desert-gold), var(--electric-blue));
}

.page-contact .contact-hero h1 {
  max-width: 860px;
  margin: 0 0 1.25rem;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2.1rem, 7vw, 4.4rem);
  line-height: 1.06;
  letter-spacing: .01em;
  color: #fff;
  transform: skewX(-3deg);
  transform-origin: left center;
}

.page-contact .contact-hero__lead {
  max-width: 640px;
  margin: 0 0 2.25rem;
  padding-left: 1.1rem;
  border-left: 3px solid var(--desert-gold);
  font-size: clamp(1rem, 2vw, 1.15rem);
  line-height: 1.8;
  color: #c4c8d2;
}

.page-contact .contact-hero__banner {
  position: relative;
  z-index: 0;
  margin-top: .5rem;
}

.page-contact .contact-hero__banner img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 1200 / 260;
  object-fit: cover;
  filter: saturate(.92) contrast(1.05);
}

/* ===== 章节头 ===== */
.page-contact .contact-section-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  column-gap: clamp(1rem, 3vw, 2rem);
  margin-bottom: 2.25rem;
  scroll-margin-top: 6rem;
}

.page-contact .contact-section-head__index {
  grid-row: span 2;
  font-family: var(--font-num);
  font-size: clamp(3rem, 10vw, 4.75rem);
  line-height: .9;
  color: var(--desert-gold);
}

.page-contact .contact-section-head h2 {
  align-self: end;
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.6rem, 5vw, 2.65rem);
  line-height: 1.12;
  color: #fff;
  transform: skewX(-3deg);
  transform-origin: left bottom;
}

.page-contact .contact-section-head__desc {
  grid-column: 2;
  margin: .35rem 0 0;
  font-size: 1rem;
  line-height: 1.65;
  color: #9aa0ad;
}

/* ===== 01 官方客服渠道 ===== */
.page-contact .contact-channels {
  padding: clamp(3rem, 8vw, 5.5rem) 0 1rem;
}

.page-contact .doors-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1fr;
  margin-top: 1rem;
}

.page-contact .door-card {
  position: relative;
  min-height: 320px;
  cursor: pointer;
  scroll-margin-top: 6rem;
}

.page-contact .door-card__inner {
  position: relative;
  width: 100%;
  height: 100%;
  min-height: 320px;
  transform-style: preserve-3d;
  transition: transform .7s cubic-bezier(.19, .65, .27, 1);
}

.page-contact .door-card:active .door-card__inner {
  transform: rotateY(180deg);
}

@media (hover: hover) {
  .page-contact .door-card:hover .door-card__inner,
  .page-contact .door-card:focus-within .door-card__inner {
    transform: rotateY(180deg);
  }
}

.page-contact .door-card__face {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .6rem;
  padding: 1.75rem 1.5rem;
  border-radius: 18px;
  overflow: hidden;
  text-align: center;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

.page-contact .door-card__glyph {
  font-family: var(--font-num);
  font-size: clamp(2.6rem, 6vw, 3.6rem);
  line-height: 1;
}

.page-contact .door-card__title {
  font-family: var(--font-head);
  font-size: 1.4rem;
  font-weight: 900;
  letter-spacing: .06em;
  color: #fff;
}

.page-contact .door-card__tag {
  font-size: .78rem;
  letter-spacing: .1em;
  color: rgba(255, 255, 255, .52);
}

.page-contact .door-card--mail .door-card__front {
  background: linear-gradient(165deg, #14202c 0%, #101822 60%);
  border: 1px solid rgba(0, 212, 255, .4);
  box-shadow: inset 0 0 40px rgba(0, 212, 255, .08);
  clip-path: var(--door-cut);
}

.page-contact .door-card--mail .door-card__front::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--electric-blue), var(--arena-purple));
}

.page-contact .door-card--mail .door-card__glyph {
  color: var(--electric-blue);
}

.page-contact .door-card--hotline .door-card__front {
  background: linear-gradient(160deg, #e8c77b 0%, #d4a74a 55%, #b98d36 100%);
  border: 1px solid rgba(212, 167, 74, .5);
  clip-path: var(--door-cut);
}

.page-contact .door-card--hotline .door-card__glyph,
.page-contact .door-card--hotline .door-card__title {
  color: #231a0c;
}

.page-contact .door-card--hotline .door-card__tag {
  color: rgba(35, 26, 12, .65);
}

.page-contact .door-card--hotline .door-card__front::after {
  content: "";
  position: absolute;
  inset: 12px;
  border: 2px solid rgba(18, 20, 28, .45);
  border-radius: 12px;
  opacity: 0;
  pointer-events: none;
}

@media (hover: hover) {
  .page-contact .door-card--hotline:hover .door-card__front::after {
    animation: page-contact-pulse 1.4s ease-out infinite;
  }
}

@keyframes page-contact-pulse {
  0%   { transform: scale(.97); opacity: .85; }
  70%  { transform: scale(1.07); opacity: 0; }
  100% { transform: scale(1.07); opacity: 0; }
}

.page-contact .door-card--letter .door-card__front {
  background: linear-gradient(165deg, #241d3f 0%, #1a1530 60%);
  border: 1px solid rgba(123, 47, 247, .5);
  box-shadow: inset 0 0 40px rgba(123, 47, 247, .1);
  clip-path: var(--door-cut);
}

.page-contact .door-card--letter .door-card__front::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--arena-purple), var(--electric-blue));
}

.page-contact .door-card--letter .door-card__glyph {
  color: #b794ff;
}

.page-contact .door-card__back {
  align-items: flex-start;
  justify-content: center;
  text-align: left;
  background: var(--sand-dune);
  border: 1px solid rgba(122, 107, 82, .25);
  color: #2a2d36;
  transform: rotateY(180deg);
}

.page-contact .door-card--mail .door-card__back {
  border-left: 4px solid var(--electric-blue);
}

.page-contact .door-card--hotline .door-card__back {
  border-left: 4px solid var(--desert-gold);
}

.page-contact .door-card--letter .door-card__back {
  border-left: 4px solid var(--arena-purple);
}

.page-contact .door-card__back::after {
  content: "";
  position: absolute;
  right: -28px;
  bottom: -28px;
  width: 110px;
  height: 110px;
  border: 22px solid rgba(212, 167, 74, .16);
  border-radius: 50%;
}

.page-contact .door-card__name {
  margin: 0 0 .35rem;
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--mountain-line);
}

.page-contact .door-card__value {
  max-width: 100%;
  font-family: var(--font-num);
  font-size: clamp(1.05rem, 2.2vw, 1.25rem);
  font-weight: 700;
  line-height: 1.4;
  color: #2b2114;
  word-break: break-all;
  text-decoration: underline;
  text-decoration-color: rgba(212, 167, 74, .6);
  text-underline-offset: 4px;
}

.page-contact .door-card__value--text {
  font-family: var(--font-body);
  font-size: 1.05rem;
  font-weight: 600;
  text-decoration: none;
}

.page-contact .door-card__desc {
  max-width: 34ch;
  margin: .6rem 0 0;
  font-size: .9rem;
  line-height: 1.65;
  color: #4a4f58;
}

.page-contact .contact-channels__tip {
  margin: 1.25rem 0 0;
  padding-left: .75rem;
  border-left: 2px solid var(--mountain-line);
  font-size: .85rem;
  line-height: 1.6;
  color: #8d93a3;
}

/* ===== 02 商务合作与函件 ===== */
.page-contact .contact-partner {
  position: relative;
  padding: clamp(3rem, 8vw, 5.5rem) 0;
  margin-top: clamp(1.5rem, 4vw, 3rem);
}

.page-contact .contact-partner::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 82% 12%, rgba(123, 47, 247, .14), transparent 32%),
    rgba(43, 46, 58, .34);
  clip-path: polygon(0 3%, 100% 0, 100% 97%, 0 100%);
  z-index: 0;
}

.page-contact .contact-partner > .contact-shell {
  position: relative;
  z-index: 1;
}

.page-contact .partner-layout {
  display: grid;
  gap: 1.75rem;
  align-items: center;
}

.page-contact .partner-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 600 / 220;
  object-fit: cover;
  border-radius: 14px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
}

.page-contact .partner-intro p {
  margin: 0 0 1rem;
  font-size: 1rem;
  line-height: 1.85;
  color: #c3c7d1;
}

.page-contact .partner-intro p:last-child {
  margin-bottom: 0;
}

.page-contact .partner-paths {
  display: grid;
  gap: 1rem;
  margin: 2rem 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .partner-path {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 1rem 1.1rem;
  padding: 1.35rem;
  background: var(--rock-gray);
  border-left: 3px solid var(--desert-gold);
  border-radius: 16px;
  box-shadow: 0 18px 40px rgba(0, 0, 0, .18);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
  transition: border-color .25s ease, transform .25s ease;
}

.page-contact .partner-path:hover {
  border-left-color: var(--electric-blue);
  transform: translateX(6px);
}

.page-contact .partner-path__num {
  font-family: var(--font-num);
  font-size: 2.1rem;
  line-height: 1;
  color: var(--desert-gold);
}

.page-contact .partner-path__body h3 {
  margin: 0 0 .45rem;
  font-family: var(--font-head);
  font-size: 1.05rem;
  font-weight: 900;
  color: #fff;
}

.page-contact .partner-path__body p {
  margin: 0;
  font-size: .9rem;
  line-height: 1.7;
  color: #aab0bc;
}

.page-contact .partner-letter {
  margin-top: 2rem;
  padding: 1.6rem 1.6rem 1.4rem;
  background: var(--sand-dune);
  border-radius: 18px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
  color: #2a2d36;
  scroll-margin-top: 6rem;
}

.page-contact .partner-letter h3 {
  margin: 0 0 .85rem;
  font-family: var(--font-head);
  font-size: 1.2rem;
  font-weight: 900;
  color: #241d12;
}

.page-contact .partner-letter p {
  margin: 0 0 .6rem;
  font-size: .92rem;
  line-height: 1.7;
  color: #484b52;
}

.page-contact .partner-letter a {
  color: #1f5f6b;
  word-break: break-all;
  text-decoration: underline;
  text-decoration-color: rgba(0, 212, 255, .6);
  text-underline-offset: 3px;
}

.page-contact .partner-letter__address {
  font-weight: 700;
  font-size: 1.05rem;
  color: #241d12;
}

.page-contact .partner-letter__note {
  margin-top: .85rem;
  padding-top: .8rem;
  border-top: 1px solid rgba(122, 107, 82, .4);
  font-size: .82rem;
  color: #6e5631;
}

/* ===== 03 常见联系场景 ===== */
.page-contact .contact-scenarios {
  padding: clamp(3rem, 8vw, 5.5rem) 0 0;
}

.page-contact .scenario-list {
  display: grid;
  gap: 1.1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .scenario-item {
  padding: 1.5rem 1.5rem 1.35rem;
  background: #1b1e28;
  border: 1px solid rgba(122, 107, 82, .22);
  border-left: 4px solid var(--desert-gold);
  border-radius: 0 14px 14px 0;
  transition: border-color .25s ease, transform .25s ease, background .25s ease;
}

.page-contact .scenario-item:hover {
  border-left-color: var(--electric-blue);
  background: #20232f;
  transform: translateX(5px);
}

.page-contact .scenario-item__badge {
  display: inline-block;
  margin-bottom: .85rem;
  padding: .28rem .68rem;
  border: 1px solid rgba(255, 190, 92, .45);
  border-radius: 999px;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--live-amber);
}

.page-contact .scenario-item h3 {
  margin: 0 0 .55rem;
  font-family: var(--font-head);
  font-size: 1.06rem;
  font-weight: 900;
  line-height: 1.45;
  color: #fff;
}

.page-contact .scenario-item p {
  margin: 0 0 .9rem;
  font-size: .92rem;
  line-height: 1.72;
  color: #b6bac4;
}

.page-contact .scenario-item p a {
  color: var(--electric-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .scenario-item__channel {
  display: inline-block;
  font-size: .85rem;
  font-weight: 700;
  color: var(--electric-blue);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: border-color .2s ease;
}

.page-contact .scenario-item__channel:hover {
  border-bottom-color: var(--electric-blue);
}

/* ===== 相关入口与返回顶部 ===== */
.page-contact .contact-related {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-block: clamp(2.5rem, 6vw, 4rem) clamp(3rem, 7vw, 5rem);
}

.page-contact .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .85rem 1.4rem;
  border-radius: 12px;
  font-family: var(--font-head);
  font-size: .92rem;
  font-weight: 900;
  letter-spacing: .05em;
  text-decoration: none;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}

.page-contact .btn:hover {
  transform: translateY(-3px);
}

.page-contact .btn-outline {
  background: transparent;
  border: 1px solid rgba(212, 167, 74, .65);
  color: var(--desert-gold);
}

.page-contact .btn-outline:hover {
  background: rgba(212, 167, 74, .12);
  box-shadow: 0 10px 30px rgba(212, 167, 74, .18);
}

.page-contact .btn-primary {
  background: linear-gradient(135deg, #e3be6d, var(--desert-gold) 60%, #b98d36);
  border: 1px solid rgba(212, 167, 74, .4);
  color: #241d12;
}

.page-contact .btn-primary:hover {
  box-shadow: 0 12px 32px rgba(212, 167, 74, .35);
}

.page-contact .scroll-top {
  padding: .5rem 1rem;
  border: 1px solid rgba(212, 167, 74, .5);
  border-radius: 8px;
  background: rgba(18, 20, 28, .6);
  color: var(--desert-gold);
  font-family: var(--font-body);
  font-size: .85rem;
  cursor: pointer;
  backdrop-filter: blur(6px);
}

/* ===== 响应式断点 ===== */
@media (min-width: 640px) {
  .page-contact .doors-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-contact .door-card--letter {
    grid-column: 1 / -1;
  }
}

@media (min-width: 760px) {
  .page-contact .scenario-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 860px) {
  .page-contact .partner-layout {
    grid-template-columns: .85fr 1.15fr;
    gap: 3rem;
  }
}

@media (min-width: 920px) {
  .page-contact .doors-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.75rem;
  }

  .page-contact .door-card--letter {
    grid-column: auto;
  }
}

/* 移动端与触屏设备：门板直接展开，保证信息可见 */
@media (hover: none), (max-width: 639px) {
  .page-contact .door-card,
  .page-contact .door-card__inner {
    min-height: 0;
  }

  .page-contact .door-card__inner {
    transform: none;
  }

  .page-contact .door-card__face {
    position: static;
    backface-visibility: visible;
    -webkit-backface-visibility: visible;
  }

  .page-contact .door-card__front {
    display: none;
  }

  .page-contact .door-card__back {
    transform: none;
  }
}

/* 减少动态效果偏好 */
@media (prefers-reduced-motion: reduce) {
  .page-contact *,
  .page-contact *::before,
  .page-contact *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }

  .page-contact .door-card__inner {
    transform: none;
  }

  .page-contact .door-card__face {
    position: static;
    backface-visibility: visible;
    -webkit-backface-visibility: visible;
  }

  .page-contact .door-card__front {
    display: none;
  }

  .page-contact .door-card__back {
    transform: none;
  }
}