.page-contact {
  --pc-rail: 340px;
  --pc-cut: 14px;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  overflow: hidden;
  background: var(--ink-900);
  color: var(--paper);
  padding: clamp(30px, 5vw, 56px) 0 clamp(72px, 9vw, 124px);
}

.page-contact .contact-hero__slash {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 46%;
  background-image: repeating-linear-gradient(-45deg, rgba(242, 160, 61, .16) 0 2px, transparent 2px 14px);
  opacity: .6;
  pointer-events: none;
}

.page-contact .contact-hero__inner {
  position: relative;
  z-index: 1;
}

.page-contact .contact-hero .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: rgba(223, 227, 233, .62);
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-contact .contact-hero .crumbs a {
  color: rgba(252, 251, 248, .78);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s ease, border-color .18s ease;
}

.page-contact .contact-hero .crumbs a:hover,
.page-contact .contact-hero .crumbs a:focus-visible {
  color: var(--amber-500);
  border-bottom-color: var(--amber-500);
}

.page-contact .contact-hero .eyebrow,
.page-contact .contact-flow .eyebrow {
  color: var(--amber-500);
}

.page-contact .contact-hero h1 {
  margin: 14px 0 22px;
  max-width: 18em;
  font-family: var(--font-head);
  font-size: clamp(30px, 5.2vw, 54px);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-contact .contact-hero .lede {
  margin: 0;
  max-width: 44em;
  font-size: clamp(16px, 1.7vw, 19px);
  line-height: 1.85;
  color: rgba(252, 251, 248, .82);
}

.page-contact .contact-hero__facts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin: clamp(34px, 5vw, 52px) 0 0;
  padding-top: clamp(22px, 3vw, 30px);
  border-top: 1px solid rgba(223, 227, 233, .18);
}

@media (min-width: 720px) {
  .page-contact .contact-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 32px;
  }
}

.page-contact .hero-fact {
  min-width: 0;
}

.page-contact .hero-fact__k {
  display: block;
  margin: 0 0 7px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: rgba(223, 227, 233, .6);
}

.page-contact .hero-fact__v {
  margin: 0;
  font-size: clamp(16px, 1.8vw, 18px);
  font-weight: 700;
  line-height: 1.5;
  color: var(--amber-200);
}

/* ---------- 三个入口 ---------- */
.page-contact .contact-channels {
  background: var(--mist-050);
  border-bottom: 1px solid var(--mist-200);
  padding: clamp(44px, 6vw, 76px) 0 clamp(52px, 6.5vw, 88px);
}

.page-contact .ch-fig {
  margin: 0 0 clamp(30px, 4vw, 46px);
}

.page-contact .ch-fig img {
  display: block;
  width: 100%;
  height: auto;
  clip-path: polygon(0 0, calc(100% - var(--pc-cut)) 0, 100% var(--pc-cut), 100% 100%, var(--pc-cut) 100%, 0 calc(100% - var(--pc-cut)));
}

.page-contact .contact-channels__title {
  margin: 14px 0 14px;
  font-family: var(--font-head);
  font-size: clamp(23px, 3vw, 34px);
  font-weight: 800;
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--ink-900);
}

.page-contact .contact-channels__lede {
  margin: 0 0 clamp(26px, 3.5vw, 40px);
  max-width: 44em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-700);
}

.page-contact .ch-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

@media (min-width: 860px) {
  .page-contact .ch-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 26px;
  }
}

.page-contact .ch-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
  padding: 28px 24px 26px;
  background: var(--paper);
  border: 1px solid var(--mist-200);
  box-shadow: inset 0 4px 0 var(--amber-500);
  clip-path: polygon(var(--pc-cut) 0, 100% 0, 100% calc(100% - var(--pc-cut)), calc(100% - var(--pc-cut)) 100%, 0 100%, 0 var(--pc-cut));
  transition: border-color .18s ease, box-shadow .18s ease, transform .18s ease;
}

.page-contact .ch-card:hover,
.page-contact .ch-card:focus-within {
  border-color: var(--amber-500);
  box-shadow: inset 0 4px 0 var(--amber-500), 0 22px 40px -30px rgba(14, 27, 46, .55);
  transform: translateY(-2px);
}

.page-contact .ch-card__no {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--amber-500);
}

.page-contact .ch-card h3 {
  margin: 0;
  font-family: var(--font-head);
  font-size: 21px;
  font-weight: 800;
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--ink-900);
}

.page-contact .ch-card__use {
  position: relative;
  margin: 0;
  padding-left: 15px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: .02em;
  color: var(--ink-500);
}

.page-contact .ch-card__use::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 8px;
  height: 2px;
  background: var(--amber-500);
}

.page-contact .ch-card__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-700);
}

.page-contact .ch-card__addr {
  margin: 0;
  padding: 10px 12px;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: .01em;
  color: var(--ink-900);
  background: var(--mist-050);
  border-left: 3px solid var(--amber-500);
  word-break: break-all;
}

.page-contact .ch-card__acts {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: auto;
  padding-top: 6px;
}

.page-contact .pc-copy {
  appearance: none;
  -webkit-appearance: none;
  padding: 9px 13px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--ink-500);
  background: transparent;
  border: 1px dashed var(--mist-200);
  cursor: pointer;
  clip-path: polygon(6px 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%, 0 6px);
  transition: background .16s ease, color .16s ease, border-color .16s ease;
}

.page-contact .pc-copy:hover,
.page-contact .pc-copy:focus-visible {
  background: var(--amber-200);
  border-color: var(--amber-500);
  color: var(--ink-900);
}

.page-contact .pc-copy:focus-visible {
  outline: 2px solid var(--ink-500);
  outline-offset: 2px;
}

.page-contact .pc-copy::after {
  content: " 已复制";
  display: none;
  color: var(--green);
  font-weight: 700;
}

.page-contact .pc-copy[data-copied]::after {
  display: inline;
}

/* ---------- 正文两栏 ---------- */
.page-contact .contact-body {
  background: var(--paper);
  padding: var(--sp-section) 0;
}

.page-contact .contact-body__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(34px, 5vw, 52px);
}

@media (min-width: 980px) {
  .page-contact .contact-body__grid {
    grid-template-columns: minmax(0, 1fr) var(--pc-rail);
    gap: clamp(40px, 5vw, 64px);
    align-items: start;
  }
}

.page-contact .contact-body__main,
.page-contact .contact-body__rail {
  min-width: 0;
}

.page-contact .contact-body__rail {
  order: -1;
}

@media (min-width: 980px) {
  .page-contact .contact-body__rail {
    order: 0;
    position: sticky;
    top: 96px;
    align-self: start;
  }
}

.page-contact .pc-block + .pc-block {
  margin-top: clamp(40px, 5vw, 64px);
  padding-top: clamp(34px, 4.5vw, 54px);
  border-top: 1px solid var(--mist-200);
}

.page-contact .pc-block h2 {
  margin: 14px 0 16px;
  font-family: var(--font-head);
  font-size: clamp(22px, 2.6vw, 30px);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--ink-900);
}

.page-contact .pc-block > p {
  margin: 0 0 18px;
  max-width: 40em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-700);
}

/* 受理节奏 */
.page-contact .pc-timing {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  border-top: 1px solid var(--mist-200);
}

.page-contact .pc-timing li {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 18px 0;
  border-bottom: 1px solid var(--mist-200);
}

@media (min-width: 660px) {
  .page-contact .pc-timing li {
    grid-template-columns: 118px minmax(0, 1fr);
    gap: 26px;
    align-items: baseline;
  }
}

.page-contact .pc-timing__k {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--amber-500);
}

.page-contact .pc-timing__v {
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--ink-700);
}

/* 合作与媒体 */
.page-contact .pc-coop {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 24px;
}

.page-contact .pc-coop__item {
  padding: 18px 20px;
  background: var(--mist-050);
  border-left: 3px solid var(--amber-500);
}

.page-contact .pc-coop__item h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 800;
  letter-spacing: -0.005em;
  color: var(--ink-900);
}

.page-contact .pc-coop__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--ink-700);
}

/* 联系地址 */
.page-contact .pc-place {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  margin-top: 24px;
  padding: 24px 22px 26px;
  background: var(--ink-900);
  clip-path: polygon(var(--pc-cut) 0, 100% 0, 100% calc(100% - var(--pc-cut)), calc(100% - var(--pc-cut)) 100%, 0 100%, 0 var(--pc-cut));
}

@media (min-width: 700px) {
  .page-contact .pc-place {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 32px;
    align-items: center;
    padding: 26px 28px 28px;
  }
}

.page-contact .pc-place__map svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-contact .pc-map__grid line {
  stroke: rgba(223, 227, 233, .18);
  stroke-width: 1;
}

.page-contact .pc-map__route {
  fill: none;
  stroke: var(--amber-500);
  stroke-width: 2.4;
  stroke-linecap: round;
  stroke-dasharray: 7 7;
}

.page-contact .pc-map__dot {
  fill: var(--amber-500);
}

.page-contact .pc-map__ring {
  fill: none;
  stroke: var(--amber-500);
  stroke-width: 1.4;
  opacity: .55;
}

.page-contact .pc-place__label {
  margin: 0 0 9px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--amber-500);
}

.page-contact .pc-place__addr {
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-size: clamp(16px, 1.9vw, 20px);
  font-weight: 700;
  line-height: 1.6;
  color: var(--paper);
}

.page-contact .pc-place__note {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.82;
  color: rgba(252, 251, 248, .74);
}

/* ---------- 侧边检查清单 ---------- */
.page-contact .pc-checklist {
  padding: 28px 24px 28px;
  background: var(--mist-050);
  border: 1px solid var(--mist-200);
  box-shadow: inset 0 4px 0 var(--amber-500);
  clip-path: polygon(var(--pc-cut) 0, 100% 0, 100% calc(100% - var(--pc-cut)), calc(100% - var(--pc-cut)) 100%, 0 100%, 0 var(--pc-cut));
}

.page-contact .pc-checklist__title {
  margin: 12px 0 16px;
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 800;
  line-height: 1.42;
  letter-spacing: -0.01em;
  color: var(--ink-900);
}

.page-contact .pc-check {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-contact .pc-check__item {
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 12px 0;
  border-bottom: 1px solid var(--mist-200);
  cursor: pointer;
}

.page-contact .pc-check li:last-child .pc-check__item {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-contact .pc-check__box {
  appearance: none;
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  margin: 3px 0 0;
  display: grid;
  place-items: center;
  background: var(--paper);
  border: 1px solid var(--mist-500);
  cursor: pointer;
  clip-path: polygon(4px 0, 100% 0, 100% calc(100% - 4px), calc(100% - 4px) 100%, 0 100%, 0 4px);
  transition: background .15s ease, border-color .15s ease;
}

.page-contact .pc-check__box:checked {
  background: var(--amber-500);
  border-color: var(--amber-500);
}

.page-contact .pc-check__box:checked::after {
  content: "";
  width: 9px;
  height: 4px;
  border-left: 2px solid var(--ink-900);
  border-bottom: 2px solid var(--ink-900);
  transform: rotate(-45deg) translate(1px, -1px);
}

.page-contact .pc-check__box:focus-visible {
  outline: 2px solid var(--ink-500);
  outline-offset: 2px;
}

.page-contact .pc-check__label {
  display: block;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ink-900);
}

.page-contact .pc-check__hint {
  display: block;
  margin-top: 3px;
  font-size: 13.5px;
  line-height: 1.68;
  color: var(--ink-500);
}

.page-contact .pc-checklist__note {
  margin: 20px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--mist-200);
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--ink-500);
}

.page-contact .pc-checklist__note a {
  color: var(--ink-500);
  text-decoration: underline;
  text-decoration-color: var(--amber-500);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

.page-contact .pc-checklist__note a:hover,
.page-contact .pc-checklist__note a:focus-visible {
  color: var(--ink-900);
}

/* ---------- 四阶段 ---------- */
.page-contact .contact-flow {
  position: relative;
  overflow: hidden;
  background: var(--ink-900);
  color: var(--paper);
  padding: var(--sp-section) 0;
}

.page-contact .contact-flow::before {
  content: "";
  position: absolute;
  left: -8%;
  right: -8%;
  top: 58px;
  height: 1px;
  background: linear-gradient(to right, transparent, rgba(242, 160, 61, .45), transparent);
  pointer-events: none;
}

.page-contact .contact-flow .wrap {
  position: relative;
  z-index: 1;
}

.page-contact .contact-flow h2 {
  margin: 14px 0 18px;
  max-width: 20em;
  font-family: var(--font-head);
  font-size: clamp(24px, 3.4vw, 38px);
  font-weight: 900;
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-contact .contact-flow__lede {
  margin: 0 0 clamp(34px, 4.5vw, 48px);
  max-width: 42em;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(252, 251, 248, .76);
}

.page-contact .pc-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

@media (min-width: 900px) {
  .page-contact .pc-flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
  }
}

.page-contact .pc-flow__step {
  display: grid;
  gap: 11px;
  align-content: start;
  min-width: 0;
  padding: 24px 22px 26px;
  background: rgba(252, 251, 248, .05);
  border: 1px solid rgba(223, 227, 233, .15);
  clip-path: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
  transition: background .2s ease, border-color .2s ease;
}

.page-contact .pc-flow__step:hover {
  background: rgba(242, 160, 61, .09);
  border-color: rgba(242, 160, 61, .45);
}

.page-contact .pc-flow__num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--amber-500);
}

.page-contact .pc-flow__step h3 {
  margin: 0;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-contact .pc-flow__step p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.82;
  color: rgba(252, 251, 248, .74);
}

.page-contact .flow-fig {
  margin: clamp(36px, 5vw, 56px) auto 0;
  max-width: 620px;
}

.page-contact .flow-fig img {
  display: block;
  width: 100%;
  height: auto;
  clip-path: polygon(0 0, calc(100% - var(--pc-cut)) 0, 100% var(--pc-cut), 100% 100%, var(--pc-cut) 100%, 0 calc(100% - var(--pc-cut)));
}

.page-contact .flow-fig__cap {
  margin: 14px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  text-align: center;
  color: rgba(223, 227, 233, .58);
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-contact .ch-card,
  .page-contact .pc-copy,
  .page-contact .pc-flow__step,
  .page-contact .pc-check__box {
    transition: none;
  }
  .page-contact .ch-card:hover,
  .page-contact .ch-card:focus-within {
    transform: none;
  }
}