.page-contact {
  --pc-sticky-gap: 110px;
  background: var(--paper);
  color: var(--ink);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  overflow: hidden;
  background: radial-gradient(120% 90% at 88% 0%, #16345c 0%, var(--blue-deep) 56%, var(--night) 100%);
  color: var(--white);
  padding: clamp(20px, 4vw, 34px) 0 clamp(64px, 9vw, 116px);
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  right: -16%;
  bottom: -46%;
  width: 62vw;
  height: 62vw;
  max-width: 720px;
  max-height: 720px;
  border-radius: 50%;
  background: radial-gradient(circle at 32% 32%, rgba(255, 107, 26, .22), transparent 62%);
  pointer-events: none;
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  left: -4%;
  right: -4%;
  bottom: -1px;
  height: clamp(38px, 6vw, 76px);
  background: var(--paper);
  clip-path: polygon(0 100%, 100% 0, 100% 100%);
  pointer-events: none;
}

.page-contact .contact-hero .breadcrumbs {
  position: relative;
  z-index: 1;
  margin-bottom: clamp(22px, 4vw, 38px);
}

.page-contact .contact-hero .breadcrumbs__link {
  color: var(--on-dark);
  text-decoration: none;
  transition: color .15s var(--ease);
}

.page-contact .contact-hero .breadcrumbs__link:hover {
  color: var(--orange-soft);
}

.page-contact .contact-hero .breadcrumbs__item [aria-current="page"] {
  color: var(--orange-soft);
}

.page-contact .contact-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(30px, 4vw, 46px);
  align-items: center;
}

.page-contact .contact-hero .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--teal);
}

.page-contact .contact-hero .display {
  margin: 0 0 18px;
  font-size: clamp(2.05rem, 5.4vw, 3.5rem);
  line-height: 1.1;
  letter-spacing: -.02em;
  font-weight: 900;
}

.page-contact .contact-hero .lede {
  margin: 0 0 clamp(22px, 3vw, 30px);
  max-width: 46ch;
  color: var(--on-dark);
  font-size: clamp(15.5px, 1.5vw, 17px);
  line-height: 1.78;
}

.page-contact .contact-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-contact .btn--ghost {
  border: 1px solid var(--hairline-dark);
  background: transparent;
  color: var(--white);
  transition: border-color .15s var(--ease), color .15s var(--ease);
}

.page-contact .btn--ghost:hover {
  border-color: var(--orange);
  color: var(--orange-soft);
}

.page-contact .contact-hero__figure {
  position: relative;
  margin: 0;
  border-radius: var(--r-xl);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, .16);
  background: var(--night);
  box-shadow: 0 30px 62px -42px rgba(0, 0, 0, .9);
}

.page-contact .contact-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 8 / 5;
  object-fit: cover;
}

/* ---------- 分屏：联系卡 + 通道 ---------- */
.page-contact .contact-split {
  position: relative;
}

.page-contact .contact-split__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-contact .contact-card {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 3.4vw, 38px);
  border-radius: var(--r-xl);
  background: linear-gradient(152deg, var(--blue-deep) 0%, var(--night) 100%);
  color: var(--white);
  box-shadow: var(--shadow-card);
}

.page-contact .contact-card::after {
  content: "";
  position: absolute;
  right: -32%;
  top: -30%;
  width: 78%;
  height: 78%;
  border-radius: 50%;
  background: radial-gradient(circle at 50% 50%, rgba(15, 191, 155, .16), transparent 66%);
  pointer-events: none;
}

.page-contact .contact-card__label {
  position: relative;
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--teal);
}

.page-contact .contact-card__title {
  position: relative;
  margin: 0;
  font-size: clamp(1.2rem, 2.2vw, 1.5rem);
  line-height: 1.35;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-contact .contact-card .contact-list {
  position: relative;
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-contact .contact-card .contact-list__item {
  display: grid;
  gap: 3px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--hairline-dark);
}

.page-contact .contact-card .contact-list__item:last-child {
  padding-bottom: 0;
  border-bottom: none;
}

.page-contact .contact-card .contact-list__label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--on-dark-soft);
}

.page-contact .contact-card__value {
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--white);
  overflow-wrap: anywhere;
}

.page-contact .contact-card__value.mono {
  font-family: var(--font-mono);
  font-size: 14.5px;
  letter-spacing: .01em;
}

.page-contact .contact-card__status {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 24px 0 0;
  padding: 8px 16px;
  border-radius: var(--r-pill);
  background: rgba(15, 191, 155, .14);
  border: 1px solid rgba(15, 191, 155, .42);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .02em;
  color: var(--mint);
}

.page-contact .contact-card__fine {
  position: relative;
  margin: 14px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--on-dark-soft);
}

.page-contact .contact-channels__head {
  margin-bottom: 20px;
}

.page-contact .contact-channels__head .h2 {
  margin: 0 0 8px;
}

.page-contact .contact-channels__sub {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--slate);
  max-width: 52ch;
}

.page-contact .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-contact .filter-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 22px;
  border-radius: var(--r-pill);
  border: 1px solid var(--hairline-strong);
  background: var(--white);
  color: var(--blue-deep);
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: background .18s var(--ease), border-color .18s var(--ease), color .18s var(--ease);
}

.page-contact .filter-btn:hover {
  border-color: var(--orange);
}

.page-contact .filter-btn[aria-pressed="true"] {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--night);
}

.page-contact .channel-items {
  display: grid;
  gap: 18px;
  margin-top: 22px;
}

.page-contact .channel-card {
  padding: clamp(20px, 3vw, 28px);
  border-radius: var(--r-lg);
  border: 1px solid var(--hairline);
  background: var(--white);
  box-shadow: var(--shadow-card);
  transition: transform .18s var(--ease), border-color .18s var(--ease);
}

.page-contact .channel-card:hover {
  transform: translateY(-4px);
  border-color: var(--orange);
}

.page-contact .channel-card__title {
  margin: 12px 0 8px;
  font-size: clamp(1.1rem, 2vw, 1.28rem);
  line-height: 1.35;
  letter-spacing: -.01em;
  color: var(--blue-deep);
}

.page-contact .channel-card__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--slate);
}

.page-contact .channel-card__facts {
  margin: 18px 0 0;
  display: grid;
  gap: 10px;
}

.page-contact .channel-card__fact {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding-top: 10px;
  border-top: 1px dashed var(--hairline);
}

.page-contact .channel-card__fact dt {
  font-size: 13px;
  color: var(--slate);
}

.page-contact .channel-card__fact dd {
  margin: 0;
  font-size: 14.5px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--blue-deep);
  overflow-wrap: anywhere;
}

.page-contact .channel-card__fact dd.mono {
  font-family: var(--font-mono);
  font-size: 13.5px;
  letter-spacing: .01em;
}

.page-contact .contact-channels__note {
  margin: 18px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--slate);
}

.page-contact .contact-channels__note a {
  color: var(--blue-deep);
  font-weight: 700;
  text-decoration-color: var(--orange);
  text-underline-offset: 3px;
}

/* ---------- 四步流程 ---------- */
.page-contact .contact-steps {
  position: relative;
  overflow: hidden;
  background: linear-gradient(162deg, var(--night) 0%, var(--blue-deep) 100%);
  color: var(--white);
}

.page-contact .contact-steps::before {
  content: "";
  position: absolute;
  left: -14%;
  bottom: -34%;
  width: 54vw;
  height: 54vw;
  max-width: 620px;
  max-height: 620px;
  border-radius: 50%;
  background: radial-gradient(circle at 50% 50%, rgba(255, 107, 26, .16), transparent 64%);
  pointer-events: none;
}

.page-contact .contact-steps__inner {
  position: relative;
  display: grid;
  gap: clamp(32px, 5vw, 56px);
  align-items: start;
}

.page-contact .contact-steps .eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--teal);
}

.page-contact .contact-steps .h2 {
  margin: 0 0 12px;
  color: var(--white);
}

.page-contact .contact-steps__lede {
  margin: 0 0 clamp(18px, 3vw, 28px);
  max-width: 52ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--on-dark);
}

.page-contact .steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}

.page-contact .step {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 16px;
  padding: 20px 0;
  border-top: 1px solid var(--hairline-dark);
}

.page-contact .step:first-child {
  border-top: none;
  padding-top: 4px;
}

.page-contact .step__num {
  position: relative;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: .02em;
  color: var(--orange);
}

.page-contact .step__num::after {
  content: "";
  position: absolute;
  left: 46%;
  top: calc(100% + 6px);
  width: 1px;
  height: 26px;
  background: linear-gradient(180deg, var(--orange), transparent);
  transform: rotate(14deg);
  transform-origin: top center;
}

.page-contact .step:last-child .step__num::after {
  display: none;
}

.page-contact .step__title {
  margin: 0 0 6px;
  font-size: 1.06rem;
  font-weight: 800;
  line-height: 1.4;
  color: var(--white);
}

.page-contact .step__text {
  margin: 0 0 10px;
  font-size: 14.8px;
  line-height: 1.78;
  color: var(--on-dark);
}

.page-contact .step__out {
  display: inline-block;
  padding-left: 10px;
  border-left: 2px solid var(--teal);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .02em;
  color: var(--mint);
}

.page-contact .contact-steps__figure {
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--hairline-dark);
  background: rgba(255, 255, 255, .05);
}

.page-contact .contact-steps__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

/* ---------- 材料清单 ---------- */
.page-contact .contact-materials {
  background: var(--mint);
  color: var(--ink);
}

.page-contact .contact-materials__inner {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.page-contact .contact-materials .eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: #0a6b58;
}

.page-contact .contact-materials .h2 {
  margin: 0 0 12px;
  color: var(--blue-deep);
}

.page-contact .contact-materials__copy p:last-child {
  margin: 0;
  max-width: 44ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: #14405a;
}

.page-contact .materials {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-contact .material {
  padding: 22px;
  border-radius: var(--r-lg);
  background: var(--white);
  border: 1px solid rgba(11, 31, 59, .08);
  box-shadow: var(--shadow-card);
  transition: transform .18s var(--ease), border-color .18s var(--ease);
}

.page-contact .material:hover {
  transform: translateY(-4px);
  border-color: var(--orange);
}

.page-contact .material h3 {
  margin: 12px 0 8px;
  font-size: 1.04rem;
  font-weight: 800;
  line-height: 1.4;
  color: var(--blue-deep);
}

.page-contact .material p {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink);
}

.page-contact .material__check {
  margin: 0;
  padding-top: 12px;
  border-top: 1px dashed var(--hairline);
  font-size: 13px;
  line-height: 1.65;
  color: var(--slate);
}

/* ---------- 维护时间轴 ---------- */
.page-contact .contact-timeline {
  background: var(--paper);
}

.page-contact .contact-timeline__head {
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-contact .contact-timeline__head .eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--orange);
}

.page-contact .contact-timeline__head .h2 {
  margin: 0 0 12px;
  color: var(--blue-deep);
}

.page-contact .contact-timeline__head p:last-child {
  margin: 0;
  max-width: 58ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--slate);
}

.page-contact .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-contact .timeline__item {
  position: relative;
  padding-left: 26px;
}

.page-contact .timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 0 4px rgba(15, 191, 155, .16);
}

.page-contact .timeline__item::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 36px;
  bottom: -20px;
  width: 2px;
  background: linear-gradient(180deg, var(--hairline-strong), transparent);
}

.page-contact .timeline__item:last-child::after {
  display: none;
}

.page-contact .timeline__item--now::before {
  background: var(--amber);
  box-shadow: 0 0 0 4px rgba(255, 209, 102, .3);
}

.page-contact .timeline__node {
  padding: 16px 18px;
  border-radius: var(--r-md);
  border: 1px solid var(--hairline);
  background: var(--white);
  transition: border-color .18s var(--ease);
}

.page-contact .timeline__node:hover {
  border-color: var(--orange);
}

.page-contact .timeline__node[open] {
  border-color: var(--orange);
}

.page-contact .timeline__node summary {
  list-style: none;
  cursor: pointer;
  display: grid;
  gap: 6px;
}

.page-contact .timeline__node summary::-webkit-details-marker {
  display: none;
}

.page-contact .timeline__when {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--slate);
}

.page-contact .timeline__item--now .timeline__when {
  color: #a06a00;
}

.page-contact .timeline__title {
  font-size: 15px;
  font-weight: 800;
  line-height: 1.45;
  color: var(--blue-deep);
}

.page-contact .timeline__text {
  margin: 12px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--hairline);
  font-size: 14px;
  line-height: 1.75;
  color: var(--slate);
}

/* ---------- 收束 ---------- */
.page-contact .contact-close {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, var(--blue-deep), var(--night));
  color: var(--white);
}

.page-contact .contact-close::before {
  content: "";
  position: absolute;
  right: -8%;
  top: -60%;
  width: 46vw;
  height: 46vw;
  max-width: 520px;
  max-height: 520px;
  border-radius: 50%;
  background: radial-gradient(circle at 50% 50%, rgba(255, 107, 26, .18), transparent 66%);
  pointer-events: none;
}

.page-contact .contact-close__inner {
  position: relative;
  max-width: 62ch;
}

.page-contact .contact-close .h2 {
  margin: 0 0 12px;
  color: var(--white);
}

.page-contact .contact-close p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--on-dark);
}

.page-contact .contact-close__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 30px);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-contact .materials {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
  }

  .page-contact .step {
    grid-template-columns: 68px minmax(0, 1fr);
    gap: 20px;
  }

  .page-contact .step__num {
    font-size: 32px;
  }
}

@media (min-width: 900px) {
  .page-contact .contact-hero__inner {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
  }

  .page-contact .contact-hero__figure img {
    aspect-ratio: 8 / 3;
  }

  .page-contact .contact-steps__inner {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
  }
}

@media (min-width: 960px) {
  .page-contact .contact-split__grid {
    grid-template-columns: minmax(0, 45fr) minmax(0, 55fr);
  }

  .page-contact .contact-card {
    position: sticky;
    top: var(--pc-sticky-gap);
  }

  .page-contact .contact-materials__inner {
    grid-template-columns: minmax(0, .68fr) minmax(0, 1.32fr);
  }

  .page-contact .materials {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .material:nth-child(2) {
    margin-top: 30px;
  }

  .page-contact .material:nth-child(3) {
    margin-top: 14px;
  }

  .page-contact .timeline {
    grid-auto-flow: column;
    grid-auto-columns: minmax(232px, 1fr);
    gap: 20px;
    overflow-x: auto;
    padding: 8px 4px 20px;
    scroll-snap-type: x proximity;
  }

  .page-contact .timeline__item {
    padding: 32px 0 0;
    scroll-snap-align: start;
  }

  .page-contact .timeline__item::before {
    left: 18px;
    top: 6px;
  }

  .page-contact .timeline__item::after {
    left: 32px;
    right: -20px;
    top: 10px;
    bottom: auto;
    width: auto;
    height: 2px;
    background: linear-gradient(90deg, var(--hairline-strong), transparent);
  }

  .page-contact .timeline__item:last-child::after {
    display: none;
  }

  .page-contact .timeline__node {
    height: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-card,
  .page-contact .material,
  .page-contact .filter-btn,
  .page-contact .timeline__node,
  .page-contact .btn--ghost {
    transition: none;
  }

  .page-contact .channel-card:hover,
  .page-contact .material:hover {
    transform: none;
  }
}
<<<END>>>