.page-contact {
  --co-cut: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
  --co-cut-sm: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
}

.page-contact [hidden] {
  display: none !important;
}

/* ---------- 面包屑位置 ---------- */
.page-contact .crumbs-row {
  padding-top: clamp(14px, 3vw, 26px);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 5vw, 46px) 0 clamp(34px, 6vw, 72px);
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  z-index: 0;
  right: -12%;
  bottom: -34%;
  width: min(720px, 90%);
  height: 340px;
  background-image:
    linear-gradient(var(--paper-2) 1px, transparent 1px),
    linear-gradient(90deg, var(--paper-2) 1px, transparent 1px);
  background-size: 44px 44px;
  transform: skewY(-5deg) rotate(-1deg);
  opacity: .55;
  pointer-events: none;
}

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

.page-contact .contact-hero .eyebrow {
  color: var(--accent-2);
}

.page-contact .hero-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 4vw, 36px);
  margin-top: clamp(12px, 2vw, 20px);
}

.page-contact .hero-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(36px, 8vw, 74px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--text);
  margin: 0;
}

.page-contact .hero-title .hl {
  background-image: linear-gradient(transparent 62%, var(--marker) 62%, var(--marker) 92%, transparent 92%);
  padding: 0 .06em;
}

.page-contact .hero-side {
  border-top: 2px solid var(--accent);
  padding-top: 18px;
}

.page-contact .lede {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.8;
  color: var(--text);
  margin: 0;
}

.page-contact .hero-facts {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-contact .hero-facts li {
  display: flex;
  gap: 10px;
  align-items: baseline;
  font-size: 14px;
  color: var(--gray);
  border-bottom: 1px solid var(--paper-2);
  padding-bottom: 7px;
}

.page-contact .hero-facts .num {
  color: var(--accent);
}

/* ---------- 通用分区 ---------- */
.page-contact .contact-section {
  padding: clamp(40px, 7vw, 88px) 0;
}

.page-contact .sec-head {
  max-width: 46rem;
  margin-bottom: clamp(24px, 4vw, 42px);
}

.page-contact .sec-head .eyebrow {
  color: var(--accent-2);
}

.page-contact .sec-head .display-2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 4.4vw, 44px);
  line-height: 1.1;
  letter-spacing: -0.015em;
  color: var(--text);
  margin: 6px 0 0;
}

.page-contact .sec-lede {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.8;
  color: var(--gray);
  margin: 12px 0 0;
}

.page-contact .sec-head--dark .display-2 {
  color: var(--cream);
}

.page-contact .sec-head--dark .eyebrow {
  color: var(--cyan);
}

.page-contact .sec-head--dark .sec-lede {
  color: rgba(240, 230, 210, .76);
}

/* ---------- 方向选择：左轨 + 右台 ---------- */
.page-contact .dir-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

.page-contact .dir-rail {
  background: var(--ink);
  color: var(--cream);
  padding: 20px 18px 24px;
  clip-path: var(--co-cut);
}

.page-contact .dir-rail-title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0 0 14px;
}

.page-contact .dir-rail-list {
  display: grid;
  gap: 0;
}

.page-contact .dir-btn {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 10px;
  width: 100%;
  text-align: left;
  background: transparent;
  border: 0;
  border-top: 1px solid rgba(240, 230, 210, .18);
  color: var(--cream);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  line-height: 1.3;
  padding: 15px 12px 15px 16px;
  cursor: pointer;
  transition: background-color .18s var(--ease), color .18s var(--ease);
}

.page-contact .dir-btn:last-child {
  border-bottom: 1px solid rgba(240, 230, 210, .18);
}

.page-contact .dir-btn .num {
  color: rgba(240, 230, 210, .55);
  font-size: 13px;
}

.page-contact .dir-btn::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: transparent;
}

.page-contact .dir-btn:hover {
  color: var(--cyan);
}

.page-contact .dir-btn:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-contact .dir-btn[aria-pressed="true"],
.page-contact .dir-btn.is-active {
  background: var(--ink-2);
  color: var(--cream);
}

.page-contact .dir-btn[aria-pressed="true"]::before,
.page-contact .dir-btn.is-active::before {
  background: var(--accent);
}

.page-contact .dir-btn[aria-pressed="true"] .num,
.page-contact .dir-btn.is-active .num {
  color: var(--cyan);
}

.page-contact .dir-rail-note {
  font-size: 12.5px;
  line-height: 1.7;
  color: rgba(240, 230, 210, .62);
  margin: 18px 0 0;
}

.page-contact .dir-stage {
  display: grid;
  gap: 0;
}

.page-contact .dir-panel {
  background: var(--paper-3);
  clip-path: var(--co-cut);
  padding: clamp(20px, 3.4vw, 34px);
}

.page-contact .panel-index {
  font-size: 12.5px;
  letter-spacing: .08em;
  color: var(--accent-2);
  margin: 0;
}

.page-contact .panel-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 2.6vw, 28px);
  color: var(--text);
  margin: 8px 0 0;
}

.page-contact .panel-lede {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
  margin: 12px 0 0;
  max-width: 44rem;
}

.page-contact .panel-cols {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  margin-top: 24px;
}

.page-contact .col-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--gray);
  margin: 0 0 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--paper-2);
}

.page-contact .plain-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-contact .plain-list li {
  position: relative;
  padding-left: 16px;
  font-family: var(--font-body);
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--text);
}

.page-contact .plain-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 7px;
  height: 2px;
  background: var(--accent);
}

.page-contact .prep-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-contact .check {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 15.5px;
  line-height: 1.65;
  color: var(--text);
}

.page-contact .check input {
  appearance: none;
  -webkit-appearance: none;
  position: relative;
  flex: 0 0 auto;
  width: 17px;
  height: 17px;
  margin: 3px 0 0;
  background: var(--paper);
  border: 1.5px solid var(--gray);
  border-radius: 0;
  cursor: pointer;
}

.page-contact .check input:checked {
  background: var(--accent);
  border-color: var(--accent-2);
}

.page-contact .check input:checked::after {
  content: "";
  position: absolute;
  left: 4.5px;
  top: 1px;
  width: 5px;
  height: 9px;
  border-right: 2px solid var(--cream);
  border-bottom: 2px solid var(--cream);
  transform: rotate(40deg);
}

.page-contact .check input:focus-visible {
  outline: 2px solid var(--cyan-2);
  outline-offset: 2px;
}

.page-contact .check input:checked + span {
  color: var(--gray);
}

.page-contact .dir-figure {
  margin: clamp(28px, 5vw, 52px) 0 0;
  max-width: 1000px;
  margin-left: auto;
}

.page-contact .dir-figure img,
.page-contact .flow-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  background: var(--paper-3);
}

/* ---------- 流程带 ---------- */
.page-contact .flow-band {
  position: relative;
  background: var(--ink);
  color: var(--cream);
  overflow: hidden;
}

.page-contact .flow-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(-45deg, transparent 0 22px, rgba(31, 224, 196, .07) 22px 23px);
  pointer-events: none;
}

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

.page-contact .flow-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-contact .flow-step {
  position: relative;
  padding-top: 22px;
  border-top: 1px solid rgba(240, 230, 210, .24);
}

.page-contact .flow-step::before {
  content: "";
  position: absolute;
  top: -5px;
  left: 0;
  width: 9px;
  height: 9px;
  background: var(--cyan);
  transform: rotate(45deg);
}

.page-contact .step-no {
  font-size: 13px;
  color: var(--cyan);
  margin: 0;
}

.page-contact .step-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  color: var(--cream);
  margin: 8px 0 0;
}

.page-contact .step-text {
  font-family: var(--font-body);
  font-size: 15.5px;
  line-height: 1.75;
  color: rgba(240, 230, 210, .82);
  margin: 8px 0 0;
}

.page-contact .step-owner {
  margin: 12px 0 0;
}

.page-contact .flow-figure {
  margin: clamp(30px, 5vw, 56px) 0 0;
}

.page-contact .flow-figure .frame-caption {
  color: rgba(240, 230, 210, .7);
}

/* ---------- 联系方式档案卡 ---------- */
.page-contact .reach-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-contact .doc-card {
  position: relative;
  background: var(--paper);
  border-top: 4px solid var(--accent);
  clip-path: var(--co-cut-sm);
  padding: clamp(20px, 3vw, 28px);
}

.page-contact .doc-no {
  position: absolute;
  top: 14px;
  right: 16px;
  font-size: 12.5px;
  color: var(--paper-2);
  margin: 0;
}

.page-contact .doc-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--gray);
  margin: 0;
}

.page-contact .doc-value {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.6;
  color: var(--text);
  margin: 12px 0 0;
  word-break: break-word;
  overflow-wrap: anywhere;
}

.page-contact .doc-sub {
  font-size: 13px;
  line-height: 1.7;
  color: var(--gray);
  margin: 10px 0 0;
}

.page-contact .doc-card .copy-btn {
  margin-top: 16px;
}

.page-contact .reach-note {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.8;
  color: var(--gray);
  margin: clamp(20px, 3vw, 30px) 0 0;
  max-width: 46rem;
  padding-left: 14px;
  border-left: 3px solid var(--cyan-2);
}

.page-contact .reach-note a,
.page-contact .cta-text a,
.page-contact .co-tail a,
.page-contact .qa-body a {
  color: var(--cyan-2);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .reach-note a:hover,
.page-contact .cta-text a:hover,
.page-contact .co-tail a:hover,
.page-contact .qa-body a:hover {
  color: var(--accent-2);
}

/* ---------- 写邮件建议 ---------- */
.page-contact .tips-band {
  background: var(--paper-2);
  position: relative;
}

.page-contact .tips-band::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 10px;
  background: linear-gradient(-2deg, transparent 60%, var(--paper) 60%);
}

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

.page-contact .tips-list {
  list-style: none;
  counter-reset: tip;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
  max-width: 46rem;
}

.page-contact .tips-list li {
  counter-increment: tip;
  position: relative;
  padding-left: 48px;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
}

.page-contact .tips-list li::before {
  content: "0" counter(tip);
  position: absolute;
  left: 0;
  top: 1px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent-2);
  border: 1px solid var(--accent-2);
  padding: 2px 5px;
}

.page-contact .tips-list--cont li::before {
  content: "0" counter(tip);
}

.page-contact .mail-sample {
  display: inline-block;
  margin: 14px 0 18px 48px;
  padding: 12px 16px;
  background: var(--ink);
  color: var(--cyan);
  font-size: 14px;
  letter-spacing: .02em;
  clip-path: var(--co-cut-sm);
  max-width: calc(100% - 48px);
  word-break: break-word;
}

.page-contact .tips-foot {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.8;
  color: var(--gray);
  margin: 22px 0 0;
  max-width: 46rem;
}

/* ---------- 问答 ---------- */
.page-contact .qa-list {
  border-top: 1px solid var(--paper-2);
}

.page-contact .qa {
  border-bottom: 1px solid var(--paper-2);
}

.page-contact .qa > summary {
  list-style: none;
  cursor: pointer;
  position: relative;
  padding: 18px 42px 18px 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  line-height: 1.5;
  color: var(--text);
}

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

.page-contact .qa > summary::after {
  content: "+";
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--accent);
  line-height: 1;
}

.page-contact .qa[open] > summary::after {
  content: "–";
}

.page-contact .qa > summary:focus-visible {
  outline: 2px solid var(--cyan-2);
  outline-offset: 2px;
}

.page-contact .qa-body {
  padding: 0 0 20px;
  max-width: 46rem;
}

.page-contact .qa-body p {
  font-family: var(--font-body);
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--text);
  margin: 0;
}

/* ---------- 收尾 ---------- */
.page-contact .co-cta {
  margin-top: clamp(32px, 5vw, 54px);
  padding-top: clamp(24px, 3vw, 34px);
  border-top: 3px solid var(--ink);
  display: grid;
  gap: 18px;
  grid-template-columns: 1fr;
  align-items: center;
}

.page-contact .cta-text {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
  margin: 0;
}

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

.page-contact .co-tail {
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--gray);
  margin: 22px 0 0;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-contact .dir-stage {
    gap: 0;
  }

  .page-contact .panel-cols {
    grid-template-columns: 1fr 1fr;
    gap: 28px;
  }

  .page-contact .reach-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .flow-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 30px 26px;
  }

  .page-contact .co-cta {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: 24px;
  }
}

@media (min-width: 900px) {
  .page-contact .hero-side {
    border-top: 0;
    border-left: 2px solid var(--accent);
    padding-top: 0;
    padding-left: 22px;
  }

  .page-contact .hero-split {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, .85fr);
    align-items: end;
    gap: clamp(30px, 5vw, 70px);
  }

  .page-contact .dir-split {
    grid-template-columns: 264px minmax(0, 1fr);
    align-items: stretch;
  }

  .page-contact .dir-rail {
    padding: 26px 20px 30px;
  }

  .page-contact .dir-stage {
    min-width: 0;
  }

  .page-contact .dir-panel {
    margin-left: 22px;
  }

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

@media (min-width: 1024px) {
  .page-contact .flow-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0 28px;
  }

  .page-contact .flow-step::after {
    content: "";
    position: absolute;
    right: -15px;
    top: -1px;
    width: 30px;
    height: 2px;
    background: var(--accent);
    transform: rotate(14deg);
    transform-origin: right center;
    opacity: .8;
  }

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

@media (min-width: 1200px) {
  .page-contact .reach-row {
    margin-inline: -28px;
  }

  .page-contact .dir-figure {
    margin-right: -28px;
    margin-left: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .dir-btn,
  .page-contact .check input {
    transition: none;
  }
}